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The atmel-isc will use the common symbols inside the atmel-isc-base Future driver will also use the same symbols and redefine different aspects, for a different version of the ISC. This is done to avoid complete code duplication by creating a totally different driver for the new variant of the ISC. Signed-off-by: Eugen Hristev --- Hello Hans and Sakari, I did minor changes in this versions according to your reviews. Regarding the old checkpatch issues, the patch 2/2 of this series addresses those. Regarding Sakari's review, I will come up with a follow-up patch. This patch is just a split, so, it keeps the original code as it is now in the media_tree.git . Once the split is done I can do changes to fix up the minor issues in separate patches, to not mix up things. Thanks ! Eugen Changes in v4: - Removed Songjun's e-mail address as it's no longer valid. Only kept his name Changes in v3: - Fixed up the externs, moved to header file - moved the module parameters to atmel-isc-base.c Changes in v2: - renamed atmel-isc.c to atmel-sama5d2-isc.c as sama5d2 is the SoC that includes this hardware block. The module will still be named atmel-isc.ko - removed ifdef around definition of ATMEL_ISC_NAME - moved external declarations in the specific files, this was breaking module loading MAINTAINERS | 4 +- drivers/media/platform/atmel/Makefile | 4 +- drivers/media/platform/atmel/atmel-isc-base.c | 2153 ++++++++++++++++++ drivers/media/platform/atmel/atmel-isc.c | 2634 ---------------------- drivers/media/platform/atmel/atmel-isc.h | 208 ++ drivers/media/platform/atmel/atmel-sama5d2-isc.c | 344 +++ 6 files changed, 2711 insertions(+), 2636 deletions(-) create mode 100644 drivers/media/platform/atmel/atmel-isc-base.c delete mode 100644 drivers/media/platform/atmel/atmel-isc.c create mode 100644 drivers/media/platform/atmel/atmel-isc.h create mode 100644 drivers/media/platform/atmel/atmel-sama5d2-isc.c diff --git a/MAINTAINERS b/MAINTAINERS index 5cfbea4..3dc8289 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10270,7 +10270,9 @@ MICROCHIP ISC DRIVER M: Eugen Hristev L: linux-media@vger.kernel.org S: Supported -F: drivers/media/platform/atmel/atmel-isc.c +F: drivers/media/platform/atmel/atmel-sama5d2-isc.c +F: drivers/media/platform/atmel/atmel-isc.h +F: drivers/media/platform/atmel/atmel-isc-base.c F: drivers/media/platform/atmel/atmel-isc-regs.h F: Documentation/devicetree/bindings/media/atmel-isc.txt diff --git a/drivers/media/platform/atmel/Makefile b/drivers/media/platform/atmel/Makefile index 27000d0..9462736 100644 --- a/drivers/media/platform/atmel/Makefile +++ b/drivers/media/platform/atmel/Makefile @@ -1,2 +1,4 @@ -obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o +atmel-isc-objs = atmel-sama5d2-isc.o atmel-isc-base.o + obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o +obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c new file mode 100644 index 0000000..ab328e6 --- /dev/null +++ b/drivers/media/platform/atmel/atmel-isc-base.c @@ -0,0 +1,2153 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Microchip Image Sensor Controller (ISC) common driver base + * + * Copyright (C) 2016-2019 Microchip Technology, Inc. + * + * Author: Songjun Wu + * Author: Eugen Hristev + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "atmel-isc-regs.h" +#include "atmel-isc.h" + +unsigned int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "debug level (0-2)"); + +unsigned int sensor_preferred = 1; +module_param(sensor_preferred, uint, 0644); +MODULE_PARM_DESC(sensor_preferred, + "Sensor is preferred to output the specified format (1-on 0-off), default 1"); + +/* This is a list of the formats that the ISC can *output* */ +struct isc_format controller_formats[] = { + { + .fourcc = V4L2_PIX_FMT_ARGB444, + }, + { + .fourcc = V4L2_PIX_FMT_ARGB555, + }, + { + .fourcc = V4L2_PIX_FMT_RGB565, + }, + { + .fourcc = V4L2_PIX_FMT_ABGR32, + }, + { + .fourcc = V4L2_PIX_FMT_XBGR32, + }, + { + .fourcc = V4L2_PIX_FMT_YUV420, + }, + { + .fourcc = V4L2_PIX_FMT_YUYV, + }, + { + .fourcc = V4L2_PIX_FMT_YUV422P, + }, + { + .fourcc = V4L2_PIX_FMT_GREY, + }, +}; + +/* This is a list of formats that the ISC can receive as *input* */ +struct isc_format formats_list[] = { + { + .fourcc = V4L2_PIX_FMT_SBGGR8, + .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, + .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, + .cfa_baycfg = ISC_BAY_CFG_BGBG, + }, + { + .fourcc = V4L2_PIX_FMT_SGBRG8, + .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8, + .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, + .cfa_baycfg = ISC_BAY_CFG_GBGB, + }, + { + .fourcc = V4L2_PIX_FMT_SGRBG8, + .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8, + .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, + .cfa_baycfg = ISC_BAY_CFG_GRGR, + }, + { + .fourcc = V4L2_PIX_FMT_SRGGB8, + .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8, + .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, + .cfa_baycfg = ISC_BAY_CFG_RGRG, + }, + { + .fourcc = V4L2_PIX_FMT_SBGGR10, + .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10, + .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, + .cfa_baycfg = ISC_BAY_CFG_RGRG, + }, + { + .fourcc = V4L2_PIX_FMT_SGBRG10, + .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10, + .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, + .cfa_baycfg = ISC_BAY_CFG_GBGB, + }, + { + .fourcc = V4L2_PIX_FMT_SGRBG10, + .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10, + .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, + .cfa_baycfg = ISC_BAY_CFG_GRGR, + }, + { + .fourcc = V4L2_PIX_FMT_SRGGB10, + .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10, + .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, + .cfa_baycfg = ISC_BAY_CFG_RGRG, + }, + { + .fourcc = V4L2_PIX_FMT_SBGGR12, + .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12, + .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, + .cfa_baycfg = ISC_BAY_CFG_BGBG, + }, + { + .fourcc = V4L2_PIX_FMT_SGBRG12, + .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12, + .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, + .cfa_baycfg = ISC_BAY_CFG_GBGB, + }, + { + .fourcc = V4L2_PIX_FMT_SGRBG12, + .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12, + .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, + .cfa_baycfg = ISC_BAY_CFG_GRGR, + }, + { + .fourcc = V4L2_PIX_FMT_SRGGB12, + .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12, + .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, + .cfa_baycfg = ISC_BAY_CFG_RGRG, + }, + { + .fourcc = V4L2_PIX_FMT_GREY, + .mbus_code = MEDIA_BUS_FMT_Y8_1X8, + .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, + }, + { + .fourcc = V4L2_PIX_FMT_YUYV, + .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, + .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, + }, + { + .fourcc = V4L2_PIX_FMT_RGB565, + .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE, + .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, + }, +}; + +/* Gamma table with gamma 1/2.2 */ +const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES] = { + /* 0 --> gamma 1/1.8 */ + { 0x65, 0x66002F, 0x950025, 0xBB0020, 0xDB001D, 0xF8001A, + 0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012, + 0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F, + 0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E, + 0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C, + 0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B, + 0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A, + 0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A, + 0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A, + 0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009, + 0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 }, + + /* 1 --> gamma 1/2 */ + { 0x7F, 0x800034, 0xB50028, 0xDE0021, 0x100001E, 0x11E001B, + 0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013, + 0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F, + 0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D, + 0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B, + 0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A, + 0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A, + 0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009, + 0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009, + 0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009, + 0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 }, + + /* 2 --> gamma 1/2.2 */ + { 0x99, 0x9B0038, 0xD4002A, 0xFF0023, 0x122001F, 0x141001B, + 0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012, + 0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F, + 0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C, + 0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B, + 0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A, + 0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009, + 0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009, + 0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008, + 0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007, + 0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 }, +}; + +#define ISC_IS_FORMAT_RAW(mbus_code) \ + (((mbus_code) & 0xf000) == 0x3000) + +static inline void isc_update_awb_ctrls(struct isc_device *isc) +{ + struct isc_ctrls *ctrls = &isc->ctrls; + + regmap_write(isc->regmap, ISC_WB_O_RGR, + (ISC_WB_O_ZERO_VAL - (ctrls->offset[ISC_HIS_CFG_MODE_R])) | + ((ISC_WB_O_ZERO_VAL - ctrls->offset[ISC_HIS_CFG_MODE_GR]) << 16)); + regmap_write(isc->regmap, ISC_WB_O_BGB, + (ISC_WB_O_ZERO_VAL - (ctrls->offset[ISC_HIS_CFG_MODE_B])) | + ((ISC_WB_O_ZERO_VAL - ctrls->offset[ISC_HIS_CFG_MODE_GB]) << 16)); + regmap_write(isc->regmap, ISC_WB_G_RGR, + ctrls->gain[ISC_HIS_CFG_MODE_R] | + (ctrls->gain[ISC_HIS_CFG_MODE_GR] << 16)); + regmap_write(isc->regmap, ISC_WB_G_BGB, + ctrls->gain[ISC_HIS_CFG_MODE_B] | + (ctrls->gain[ISC_HIS_CFG_MODE_GB] << 16)); +} + +static inline void isc_reset_awb_ctrls(struct isc_device *isc) +{ + int c; + + for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) { + /* gains have a fixed point at 9 decimals */ + isc->ctrls.gain[c] = 1 << 9; + /* offsets are in 2's complements, the value + * will be substracted from ISC_WB_O_ZERO_VAL to obtain + * 2's complement of a value between 0 and + * ISC_WB_O_ZERO_VAL >> 1 + */ + isc->ctrls.offset[c] = ISC_WB_O_ZERO_VAL; + } +} + +static int isc_wait_clk_stable(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + struct regmap *regmap = isc_clk->regmap; + unsigned long timeout = jiffies + usecs_to_jiffies(1000); + unsigned int status; + + while (time_before(jiffies, timeout)) { + regmap_read(regmap, ISC_CLKSR, &status); + if (!(status & ISC_CLKSR_SIP)) + return 0; + + usleep_range(10, 250); + } + + return -ETIMEDOUT; +} + +static int isc_clk_prepare(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + + if (isc_clk->id == ISC_ISPCK) + pm_runtime_get_sync(isc_clk->dev); + + return isc_wait_clk_stable(hw); +} + +static void isc_clk_unprepare(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + + isc_wait_clk_stable(hw); + + if (isc_clk->id == ISC_ISPCK) + pm_runtime_put_sync(isc_clk->dev); +} + +static int isc_clk_enable(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + u32 id = isc_clk->id; + struct regmap *regmap = isc_clk->regmap; + unsigned long flags; + unsigned int status; + + dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n", + __func__, isc_clk->div, isc_clk->parent_id); + + spin_lock_irqsave(&isc_clk->lock, flags); + regmap_update_bits(regmap, ISC_CLKCFG, + ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id), + (isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) | + (isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id))); + + regmap_write(regmap, ISC_CLKEN, ISC_CLK(id)); + spin_unlock_irqrestore(&isc_clk->lock, flags); + + regmap_read(regmap, ISC_CLKSR, &status); + if (status & ISC_CLK(id)) + return 0; + else + return -EINVAL; +} + +static void isc_clk_disable(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + u32 id = isc_clk->id; + unsigned long flags; + + spin_lock_irqsave(&isc_clk->lock, flags); + regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id)); + spin_unlock_irqrestore(&isc_clk->lock, flags); +} + +static int isc_clk_is_enabled(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + u32 status; + + if (isc_clk->id == ISC_ISPCK) + pm_runtime_get_sync(isc_clk->dev); + + regmap_read(isc_clk->regmap, ISC_CLKSR, &status); + + if (isc_clk->id == ISC_ISPCK) + pm_runtime_put_sync(isc_clk->dev); + + return status & ISC_CLK(isc_clk->id) ? 1 : 0; +} + +static unsigned long +isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + + return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1); +} + +static int isc_clk_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + long best_rate = -EINVAL; + int best_diff = -1; + unsigned int i, div; + + for (i = 0; i < clk_hw_get_num_parents(hw); i++) { + struct clk_hw *parent; + unsigned long parent_rate; + + parent = clk_hw_get_parent_by_index(hw, i); + if (!parent) + continue; + + parent_rate = clk_hw_get_rate(parent); + if (!parent_rate) + continue; + + for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) { + unsigned long rate; + int diff; + + rate = DIV_ROUND_CLOSEST(parent_rate, div); + diff = abs(req->rate - rate); + + if (best_diff < 0 || best_diff > diff) { + best_rate = rate; + best_diff = diff; + req->best_parent_rate = parent_rate; + req->best_parent_hw = parent; + } + + if (!best_diff || rate < req->rate) + break; + } + + if (!best_diff) + break; + } + + dev_dbg(isc_clk->dev, + "ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n", + __func__, best_rate, + __clk_get_name((req->best_parent_hw)->clk), + req->best_parent_rate); + + if (best_rate < 0) + return best_rate; + + req->rate = best_rate; + + return 0; +} + +static int isc_clk_set_parent(struct clk_hw *hw, u8 index) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + + if (index >= clk_hw_get_num_parents(hw)) + return -EINVAL; + + isc_clk->parent_id = index; + + return 0; +} + +static u8 isc_clk_get_parent(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + + return isc_clk->parent_id; +} + +static int isc_clk_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + u32 div; + + if (!rate) + return -EINVAL; + + div = DIV_ROUND_CLOSEST(parent_rate, rate); + if (div > (ISC_CLK_MAX_DIV + 1) || !div) + return -EINVAL; + + isc_clk->div = div - 1; + + return 0; +} + +static const struct clk_ops isc_clk_ops = { + .prepare = isc_clk_prepare, + .unprepare = isc_clk_unprepare, + .enable = isc_clk_enable, + .disable = isc_clk_disable, + .is_enabled = isc_clk_is_enabled, + .recalc_rate = isc_clk_recalc_rate, + .determine_rate = isc_clk_determine_rate, + .set_parent = isc_clk_set_parent, + .get_parent = isc_clk_get_parent, + .set_rate = isc_clk_set_rate, +}; + +static int isc_clk_register(struct isc_device *isc, unsigned int id) +{ + struct regmap *regmap = isc->regmap; + struct device_node *np = isc->dev->of_node; + struct isc_clk *isc_clk; + struct clk_init_data init; + const char *clk_name = np->name; + const char *parent_names[3]; + int num_parents; + + num_parents = of_clk_get_parent_count(np); + if (num_parents < 1 || num_parents > 3) + return -EINVAL; + + if (num_parents > 2 && id == ISC_ISPCK) + num_parents = 2; + + of_clk_parent_fill(np, parent_names, num_parents); + + if (id == ISC_MCK) + of_property_read_string(np, "clock-output-names", &clk_name); + else + clk_name = "isc-ispck"; + + init.parent_names = parent_names; + init.num_parents = num_parents; + init.name = clk_name; + init.ops = &isc_clk_ops; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; + + isc_clk = &isc->isc_clks[id]; + isc_clk->hw.init = &init; + isc_clk->regmap = regmap; + isc_clk->id = id; + isc_clk->dev = isc->dev; + spin_lock_init(&isc_clk->lock); + + isc_clk->clk = clk_register(isc->dev, &isc_clk->hw); + if (IS_ERR(isc_clk->clk)) { + dev_err(isc->dev, "%s: clock register fail\n", clk_name); + return PTR_ERR(isc_clk->clk); + } else if (id == ISC_MCK) + of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk); + + return 0; +} + +int isc_clk_init(struct isc_device *isc) +{ + unsigned int i; + int ret; + + for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) + isc->isc_clks[i].clk = ERR_PTR(-EINVAL); + + for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) { + ret = isc_clk_register(isc, i); + if (ret) + return ret; + } + + return 0; +} + +void isc_clk_cleanup(struct isc_device *isc) +{ + unsigned int i; + + of_clk_del_provider(isc->dev->of_node); + + for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) { + struct isc_clk *isc_clk = &isc->isc_clks[i]; + + if (!IS_ERR(isc_clk->clk)) + clk_unregister(isc_clk->clk); + } +} + +static int isc_queue_setup(struct vb2_queue *vq, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], struct device *alloc_devs[]) +{ + struct isc_device *isc = vb2_get_drv_priv(vq); + unsigned int size = isc->fmt.fmt.pix.sizeimage; + + if (*nplanes) + return sizes[0] < size ? -EINVAL : 0; + + *nplanes = 1; + sizes[0] = size; + + return 0; +} + +static int isc_buffer_prepare(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue); + unsigned long size = isc->fmt.fmt.pix.sizeimage; + + if (vb2_plane_size(vb, 0) < size) { + v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, size); + + vbuf->field = isc->fmt.fmt.pix.field; + + return 0; +} + +static void isc_start_dma(struct isc_device *isc) +{ + struct regmap *regmap = isc->regmap; + u32 sizeimage = isc->fmt.fmt.pix.sizeimage; + u32 dctrl_dview; + dma_addr_t addr0; + u32 h, w; + + h = isc->fmt.fmt.pix.height; + w = isc->fmt.fmt.pix.width; + + /* + * In case the sensor is not RAW, it will output a pixel (12-16 bits) + * with two samples on the ISC Data bus (which is 8-12) + * ISC will count each sample, so, we need to multiply these values + * by two, to get the real number of samples for the required pixels. + */ + if (!ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) { + h <<= 1; + w <<= 1; + } + + /* + * We limit the column/row count that the ISC will output according + * to the configured resolution that we want. + * This will avoid the situation where the sensor is misconfigured, + * sending more data, and the ISC will just take it and DMA to memory, + * causing corruption. + */ + regmap_write(regmap, ISC_PFE_CFG1, + (ISC_PFE_CFG1_COLMIN(0) & ISC_PFE_CFG1_COLMIN_MASK) | + (ISC_PFE_CFG1_COLMAX(w - 1) & ISC_PFE_CFG1_COLMAX_MASK)); + + regmap_write(regmap, ISC_PFE_CFG2, + (ISC_PFE_CFG2_ROWMIN(0) & ISC_PFE_CFG2_ROWMIN_MASK) | + (ISC_PFE_CFG2_ROWMAX(h - 1) & ISC_PFE_CFG2_ROWMAX_MASK)); + + regmap_update_bits(regmap, ISC_PFE_CFG0, + ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN, + ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN); + + addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0); + regmap_write(regmap, ISC_DAD0, addr0); + + switch (isc->config.fourcc) { + case V4L2_PIX_FMT_YUV420: + regmap_write(regmap, ISC_DAD1, addr0 + (sizeimage * 2) / 3); + regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 5) / 6); + break; + case V4L2_PIX_FMT_YUV422P: + regmap_write(regmap, ISC_DAD1, addr0 + sizeimage / 2); + regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 3) / 4); + break; + default: + break; + } + + dctrl_dview = isc->config.dctrl_dview; + + regmap_write(regmap, ISC_DCTRL, dctrl_dview | ISC_DCTRL_IE_IS); + spin_lock(&isc->awb_lock); + regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE); + spin_unlock(&isc->awb_lock); +} + +static void isc_set_pipeline(struct isc_device *isc, u32 pipeline) +{ + struct regmap *regmap = isc->regmap; + struct isc_ctrls *ctrls = &isc->ctrls; + u32 val, bay_cfg; + const u32 *gamma; + unsigned int i; + + /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */ + for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) { + val = pipeline & BIT(i) ? 1 : 0; + regmap_field_write(isc->pipeline[i], val); + } + + if (!pipeline) + return; + + bay_cfg = isc->config.sd_format->cfa_baycfg; + + if (ctrls->awb == ISC_WB_NONE) + isc_reset_awb_ctrls(isc); + + regmap_write(regmap, ISC_WB_CFG, bay_cfg); + isc_update_awb_ctrls(isc); + + regmap_write(regmap, ISC_CFA_CFG, bay_cfg | ISC_CFA_CFG_EITPOL); + + gamma = &isc_gamma_table[ctrls->gamma_index][0]; + regmap_bulk_write(regmap, ISC_GAM_BENTRY, gamma, GAMMA_ENTRIES); + regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES); + regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES); + + /* Convert RGB to YUV */ + regmap_write(regmap, ISC_CSC_YR_YG, 0x42 | (0x81 << 16)); + regmap_write(regmap, ISC_CSC_YB_OY, 0x19 | (0x10 << 16)); + regmap_write(regmap, ISC_CSC_CBR_CBG, 0xFDA | (0xFB6 << 16)); + regmap_write(regmap, ISC_CSC_CBB_OCB, 0x70 | (0x80 << 16)); + regmap_write(regmap, ISC_CSC_CRR_CRG, 0x70 | (0xFA2 << 16)); + regmap_write(regmap, ISC_CSC_CRB_OCR, 0xFEE | (0x80 << 16)); + + regmap_write(regmap, ISC_CBC_BRIGHT, ctrls->brightness); + regmap_write(regmap, ISC_CBC_CONTRAST, ctrls->contrast); +} + +static int isc_update_profile(struct isc_device *isc) +{ + struct regmap *regmap = isc->regmap; + u32 sr; + int counter = 100; + + regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO); + + regmap_read(regmap, ISC_CTRLSR, &sr); + while ((sr & ISC_CTRL_UPPRO) && counter--) { + usleep_range(1000, 2000); + regmap_read(regmap, ISC_CTRLSR, &sr); + } + + if (counter < 0) { + v4l2_warn(&isc->v4l2_dev, "Time out to update profile\n"); + return -ETIMEDOUT; + } + + return 0; +} + +static void isc_set_histogram(struct isc_device *isc, bool enable) +{ + struct regmap *regmap = isc->regmap; + struct isc_ctrls *ctrls = &isc->ctrls; + + if (enable) { + regmap_write(regmap, ISC_HIS_CFG, + ISC_HIS_CFG_MODE_GR | + (isc->config.sd_format->cfa_baycfg + << ISC_HIS_CFG_BAYSEL_SHIFT) | + ISC_HIS_CFG_RAR); + regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_EN); + regmap_write(regmap, ISC_INTEN, ISC_INT_HISDONE); + ctrls->hist_id = ISC_HIS_CFG_MODE_GR; + isc_update_profile(isc); + regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ); + + ctrls->hist_stat = HIST_ENABLED; + } else { + regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE); + regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_DIS); + + ctrls->hist_stat = HIST_DISABLED; + } +} + +static int isc_configure(struct isc_device *isc) +{ + struct regmap *regmap = isc->regmap; + u32 pfe_cfg0, rlp_mode, dcfg, mask, pipeline; + struct isc_subdev_entity *subdev = isc->current_subdev; + + pfe_cfg0 = isc->config.sd_format->pfe_cfg0_bps; + rlp_mode = isc->config.rlp_cfg_mode; + pipeline = isc->config.bits_pipeline; + + dcfg = isc->config.dcfg_imode | + ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8; + + pfe_cfg0 |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE; + mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW | + ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW | + ISC_PFE_CFG0_MODE_MASK | ISC_PFE_CFG0_CCIR_CRC | + ISC_PFE_CFG0_CCIR656; + + regmap_update_bits(regmap, ISC_PFE_CFG0, mask, pfe_cfg0); + + regmap_update_bits(regmap, ISC_RLP_CFG, ISC_RLP_CFG_MODE_MASK, + rlp_mode); + + regmap_write(regmap, ISC_DCFG, dcfg); + + /* Set the pipeline */ + isc_set_pipeline(isc, pipeline); + + /* + * The current implemented histogram is available for RAW R, B, GB, GR + * channels. We need to check if sensor is outputting RAW BAYER + */ + if (isc->ctrls.awb && + ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) + isc_set_histogram(isc, true); + else + isc_set_histogram(isc, false); + + /* Update profile */ + return isc_update_profile(isc); +} + +static int isc_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct isc_device *isc = vb2_get_drv_priv(vq); + struct regmap *regmap = isc->regmap; + struct isc_buffer *buf; + unsigned long flags; + int ret; + + /* Enable stream on the sub device */ + ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1); + if (ret && ret != -ENOIOCTLCMD) { + v4l2_err(&isc->v4l2_dev, "stream on failed in subdev %d\n", + ret); + goto err_start_stream; + } + + pm_runtime_get_sync(isc->dev); + + ret = isc_configure(isc); + if (unlikely(ret)) + goto err_configure; + + /* Enable DMA interrupt */ + regmap_write(regmap, ISC_INTEN, ISC_INT_DDONE); + + spin_lock_irqsave(&isc->dma_queue_lock, flags); + + isc->sequence = 0; + isc->stop = false; + reinit_completion(&isc->comp); + + isc->cur_frm = list_first_entry(&isc->dma_queue, + struct isc_buffer, list); + list_del(&isc->cur_frm->list); + + isc_start_dma(isc); + + spin_unlock_irqrestore(&isc->dma_queue_lock, flags); + + /* if we streaming from RAW, we can do one-shot white balance adj */ + if (ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) + v4l2_ctrl_activate(isc->do_wb_ctrl, true); + + return 0; + +err_configure: + pm_runtime_put_sync(isc->dev); + + v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0); + +err_start_stream: + spin_lock_irqsave(&isc->dma_queue_lock, flags); + list_for_each_entry(buf, &isc->dma_queue, list) + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); + INIT_LIST_HEAD(&isc->dma_queue); + spin_unlock_irqrestore(&isc->dma_queue_lock, flags); + + return ret; +} + +static void isc_stop_streaming(struct vb2_queue *vq) +{ + struct isc_device *isc = vb2_get_drv_priv(vq); + unsigned long flags; + struct isc_buffer *buf; + int ret; + + v4l2_ctrl_activate(isc->do_wb_ctrl, false); + + isc->stop = true; + + /* Wait until the end of the current frame */ + if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ)) + v4l2_err(&isc->v4l2_dev, + "Timeout waiting for end of the capture\n"); + + /* Disable DMA interrupt */ + regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE); + + pm_runtime_put_sync(isc->dev); + + /* Disable stream on the sub device */ + ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0); + if (ret && ret != -ENOIOCTLCMD) + v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n"); + + /* Release all active buffers */ + spin_lock_irqsave(&isc->dma_queue_lock, flags); + if (unlikely(isc->cur_frm)) { + vb2_buffer_done(&isc->cur_frm->vb.vb2_buf, + VB2_BUF_STATE_ERROR); + isc->cur_frm = NULL; + } + list_for_each_entry(buf, &isc->dma_queue, list) + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + INIT_LIST_HEAD(&isc->dma_queue); + spin_unlock_irqrestore(&isc->dma_queue_lock, flags); +} + +static void isc_buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb); + struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue); + unsigned long flags; + + spin_lock_irqsave(&isc->dma_queue_lock, flags); + if (!isc->cur_frm && list_empty(&isc->dma_queue) && + vb2_is_streaming(vb->vb2_queue)) { + isc->cur_frm = buf; + isc_start_dma(isc); + } else + list_add_tail(&buf->list, &isc->dma_queue); + spin_unlock_irqrestore(&isc->dma_queue_lock, flags); +} + +static struct isc_format *find_format_by_fourcc(struct isc_device *isc, + unsigned int fourcc) +{ + unsigned int num_formats = isc->num_user_formats; + struct isc_format *fmt; + unsigned int i; + + for (i = 0; i < num_formats; i++) { + fmt = isc->user_formats[i]; + if (fmt->fourcc == fourcc) + return fmt; + } + + return NULL; +} + +static const struct vb2_ops isc_vb2_ops = { + .queue_setup = isc_queue_setup, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .buf_prepare = isc_buffer_prepare, + .start_streaming = isc_start_streaming, + .stop_streaming = isc_stop_streaming, + .buf_queue = isc_buffer_queue, +}; + +static int isc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct isc_device *isc = video_drvdata(file); + + strscpy(cap->driver, ATMEL_ISC_NAME, sizeof(cap->driver)); + strscpy(cap->card, "Atmel Image Sensor Controller", sizeof(cap->card)); + snprintf(cap->bus_info, sizeof(cap->bus_info), + "platform:%s", isc->v4l2_dev.name); + + return 0; +} + +static int isc_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + u32 index = f->index; + u32 i, supported_index; + + if (index < ARRAY_SIZE(controller_formats)) { + f->pixelformat = controller_formats[index].fourcc; + return 0; + } + + index -= ARRAY_SIZE(controller_formats); + + i = 0; + supported_index = 0; + + for (i = 0; i < ARRAY_SIZE(formats_list); i++) { + if (!ISC_IS_FORMAT_RAW(formats_list[i].mbus_code) || + !formats_list[i].sd_support) + continue; + if (supported_index == index) { + f->pixelformat = formats_list[i].fourcc; + return 0; + } + supported_index++; + } + + return -EINVAL; +} + +static int isc_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct isc_device *isc = video_drvdata(file); + + *fmt = isc->fmt; + + return 0; +} + +/* + * Checks the current configured format, if ISC can output it, + * considering which type of format the ISC receives from the sensor + */ +static int isc_try_validate_formats(struct isc_device *isc) +{ + int ret; + bool bayer = false, yuv = false, rgb = false, grey = false; + + /* all formats supported by the RLP module are OK */ + switch (isc->try_config.fourcc) { + case V4L2_PIX_FMT_SBGGR8: + case V4L2_PIX_FMT_SGBRG8: + case V4L2_PIX_FMT_SGRBG8: + case V4L2_PIX_FMT_SRGGB8: + case V4L2_PIX_FMT_SBGGR10: + case V4L2_PIX_FMT_SGBRG10: + case V4L2_PIX_FMT_SGRBG10: + case V4L2_PIX_FMT_SRGGB10: + case V4L2_PIX_FMT_SBGGR12: + case V4L2_PIX_FMT_SGBRG12: + case V4L2_PIX_FMT_SGRBG12: + case V4L2_PIX_FMT_SRGGB12: + ret = 0; + bayer = true; + break; + + case V4L2_PIX_FMT_YUV420: + case V4L2_PIX_FMT_YUV422P: + case V4L2_PIX_FMT_YUYV: + ret = 0; + yuv = true; + break; + + case V4L2_PIX_FMT_RGB565: + case V4L2_PIX_FMT_ABGR32: + case V4L2_PIX_FMT_XBGR32: + case V4L2_PIX_FMT_ARGB444: + case V4L2_PIX_FMT_ARGB555: + ret = 0; + rgb = true; + break; + case V4L2_PIX_FMT_GREY: + ret = 0; + grey = true; + break; + default: + /* any other different formats are not supported */ + ret = -EINVAL; + } + + /* we cannot output RAW/Grey if we do not receive RAW */ + if ((bayer || grey) && + !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) + return -EINVAL; + + v4l2_dbg(1, debug, &isc->v4l2_dev, + "Format validation, requested rgb=%u, yuv=%u, grey=%u, bayer=%u\n", + rgb, yuv, grey, bayer); + + return ret; +} + +/* + * Configures the RLP and DMA modules, depending on the output format + * configured for the ISC. + * If direct_dump == true, just dump raw data 8 bits. + */ +static int isc_try_configure_rlp_dma(struct isc_device *isc, bool direct_dump) +{ + if (direct_dump) { + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 16; + return 0; + } + + switch (isc->try_config.fourcc) { + case V4L2_PIX_FMT_SBGGR8: + case V4L2_PIX_FMT_SGBRG8: + case V4L2_PIX_FMT_SGRBG8: + case V4L2_PIX_FMT_SRGGB8: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 8; + break; + case V4L2_PIX_FMT_SBGGR10: + case V4L2_PIX_FMT_SGBRG10: + case V4L2_PIX_FMT_SGRBG10: + case V4L2_PIX_FMT_SRGGB10: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 16; + break; + case V4L2_PIX_FMT_SBGGR12: + case V4L2_PIX_FMT_SGBRG12: + case V4L2_PIX_FMT_SGRBG12: + case V4L2_PIX_FMT_SRGGB12: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 16; + break; + case V4L2_PIX_FMT_RGB565: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_RGB565; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 16; + break; + case V4L2_PIX_FMT_ARGB444: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB444; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 16; + break; + case V4L2_PIX_FMT_ARGB555: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB555; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 16; + break; + case V4L2_PIX_FMT_ABGR32: + case V4L2_PIX_FMT_XBGR32: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB32; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 32; + break; + case V4L2_PIX_FMT_YUV420: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC420P; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR; + isc->try_config.bpp = 12; + break; + case V4L2_PIX_FMT_YUV422P: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC422P; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR; + isc->try_config.bpp = 16; + break; + case V4L2_PIX_FMT_YUYV: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 16; + break; + case V4L2_PIX_FMT_GREY: + isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY8; + isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; + isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; + isc->try_config.bpp = 8; + break; + default: + return -EINVAL; + } + return 0; +} + +/* + * Configuring pipeline modules, depending on which format the ISC outputs + * and considering which format it has as input from the sensor. + */ +static int isc_try_configure_pipeline(struct isc_device *isc) +{ + switch (isc->try_config.fourcc) { + case V4L2_PIX_FMT_RGB565: + case V4L2_PIX_FMT_ARGB555: + case V4L2_PIX_FMT_ARGB444: + case V4L2_PIX_FMT_ABGR32: + case V4L2_PIX_FMT_XBGR32: + /* if sensor format is RAW, we convert inside ISC */ + if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { + isc->try_config.bits_pipeline = CFA_ENABLE | + WB_ENABLE | GAM_ENABLES; + } else { + isc->try_config.bits_pipeline = 0x0; + } + break; + case V4L2_PIX_FMT_YUV420: + /* if sensor format is RAW, we convert inside ISC */ + if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { + isc->try_config.bits_pipeline = CFA_ENABLE | + CSC_ENABLE | WB_ENABLE | GAM_ENABLES | + SUB420_ENABLE | SUB422_ENABLE | CBC_ENABLE; + } else { + isc->try_config.bits_pipeline = 0x0; + } + break; + case V4L2_PIX_FMT_YUV422P: + /* if sensor format is RAW, we convert inside ISC */ + if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { + isc->try_config.bits_pipeline = CFA_ENABLE | + CSC_ENABLE | WB_ENABLE | GAM_ENABLES | + SUB422_ENABLE | CBC_ENABLE; + } else { + isc->try_config.bits_pipeline = 0x0; + } + break; + case V4L2_PIX_FMT_YUYV: + /* if sensor format is RAW, we convert inside ISC */ + if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { + isc->try_config.bits_pipeline = CFA_ENABLE | + CSC_ENABLE | WB_ENABLE | GAM_ENABLES | + SUB422_ENABLE | CBC_ENABLE; + } else { + isc->try_config.bits_pipeline = 0x0; + } + break; + case V4L2_PIX_FMT_GREY: + if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { + /* if sensor format is RAW, we convert inside ISC */ + isc->try_config.bits_pipeline = CFA_ENABLE | + CSC_ENABLE | WB_ENABLE | GAM_ENABLES | + CBC_ENABLE; + } else { + isc->try_config.bits_pipeline = 0x0; + } + break; + default: + isc->try_config.bits_pipeline = 0x0; + } + return 0; +} + +static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f, + u32 *code) +{ + int i; + struct isc_format *sd_fmt = NULL, *direct_fmt = NULL; + struct v4l2_pix_format *pixfmt = &f->fmt.pix; + struct v4l2_subdev_pad_config pad_cfg; + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_TRY, + }; + u32 mbus_code; + int ret; + bool rlp_dma_direct_dump = false; + + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + /* Step 1: find a RAW format that is supported */ + for (i = 0; i < isc->num_user_formats; i++) { + if (ISC_IS_FORMAT_RAW(isc->user_formats[i]->mbus_code)) { + sd_fmt = isc->user_formats[i]; + break; + } + } + /* Step 2: We can continue with this RAW format, or we can look + * for better: maybe sensor supports directly what we need. + */ + direct_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat); + + /* Step 3: We have both. We decide given the module parameter which + * one to use. + */ + if (direct_fmt && sd_fmt && sensor_preferred) + sd_fmt = direct_fmt; + + /* Step 4: we do not have RAW but we have a direct format. Use it. */ + if (direct_fmt && !sd_fmt) + sd_fmt = direct_fmt; + + /* Step 5: if we are using a direct format, we need to package + * everything as 8 bit data and just dump it + */ + if (sd_fmt == direct_fmt) + rlp_dma_direct_dump = true; + + /* Step 6: We have no format. This can happen if the userspace + * requests some weird/invalid format. + * In this case, default to whatever we have + */ + if (!sd_fmt && !direct_fmt) { + sd_fmt = isc->user_formats[isc->num_user_formats - 1]; + v4l2_dbg(1, debug, &isc->v4l2_dev, + "Sensor not supporting %.4s, using %.4s\n", + (char *)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc); + } + + if (!sd_fmt) { + ret = -EINVAL; + goto isc_try_fmt_err; + } + + /* Step 7: Print out what we decided for debugging */ + v4l2_dbg(1, debug, &isc->v4l2_dev, + "Preferring to have sensor using format %.4s\n", + (char *)&sd_fmt->fourcc); + + /* Step 8: at this moment we decided which format the subdev will use */ + isc->try_config.sd_format = sd_fmt; + + /* Limit to Atmel ISC hardware capabilities */ + if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH) + pixfmt->width = ISC_MAX_SUPPORT_WIDTH; + if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT) + pixfmt->height = ISC_MAX_SUPPORT_HEIGHT; + + /* + * The mbus format is the one the subdev outputs. + * The pixels will be transferred in this format Sensor -> ISC + */ + mbus_code = sd_fmt->mbus_code; + + /* + * Validate formats. If the required format is not OK, default to raw. + */ + + isc->try_config.fourcc = pixfmt->pixelformat; + + if (isc_try_validate_formats(isc)) { + pixfmt->pixelformat = isc->try_config.fourcc = sd_fmt->fourcc; + /* Re-try to validate the new format */ + ret = isc_try_validate_formats(isc); + if (ret) + goto isc_try_fmt_err; + } + + ret = isc_try_configure_rlp_dma(isc, rlp_dma_direct_dump); + if (ret) + goto isc_try_fmt_err; + + ret = isc_try_configure_pipeline(isc); + if (ret) + goto isc_try_fmt_err; + + v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code); + ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt, + &pad_cfg, &format); + if (ret < 0) + goto isc_try_fmt_subdev_err; + + v4l2_fill_pix_format(pixfmt, &format.format); + + pixfmt->field = V4L2_FIELD_NONE; + pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3; + pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; + + if (code) + *code = mbus_code; + + return 0; + +isc_try_fmt_err: + v4l2_err(&isc->v4l2_dev, "Could not find any possible format for a working pipeline\n"); +isc_try_fmt_subdev_err: + memset(&isc->try_config, 0, sizeof(isc->try_config)); + + return ret; +} + +static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f) +{ + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + u32 mbus_code = 0; + int ret; + + ret = isc_try_fmt(isc, f, &mbus_code); + if (ret) + return ret; + + v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code); + ret = v4l2_subdev_call(isc->current_subdev->sd, pad, + set_fmt, NULL, &format); + if (ret < 0) + return ret; + + isc->fmt = *f; + + if (isc->try_config.sd_format && isc->config.sd_format && + isc->try_config.sd_format != isc->config.sd_format) { + isc->ctrls.hist_stat = HIST_INIT; + isc_reset_awb_ctrls(isc); + } + /* make the try configuration active */ + isc->config = isc->try_config; + + v4l2_dbg(1, debug, &isc->v4l2_dev, "New ISC configuration in place\n"); + + return 0; +} + +static int isc_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct isc_device *isc = video_drvdata(file); + + if (vb2_is_streaming(&isc->vb2_vidq)) + return -EBUSY; + + return isc_set_fmt(isc, f); +} + +static int isc_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct isc_device *isc = video_drvdata(file); + + return isc_try_fmt(isc, f, NULL); +} + +static int isc_enum_input(struct file *file, void *priv, + struct v4l2_input *inp) +{ + if (inp->index != 0) + return -EINVAL; + + inp->type = V4L2_INPUT_TYPE_CAMERA; + inp->std = 0; + strscpy(inp->name, "Camera", sizeof(inp->name)); + + return 0; +} + +static int isc_g_input(struct file *file, void *priv, unsigned int *i) +{ + *i = 0; + + return 0; +} + +static int isc_s_input(struct file *file, void *priv, unsigned int i) +{ + if (i > 0) + return -EINVAL; + + return 0; +} + +static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct isc_device *isc = video_drvdata(file); + + return v4l2_g_parm_cap(video_devdata(file), isc->current_subdev->sd, a); +} + +static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct isc_device *isc = video_drvdata(file); + + return v4l2_s_parm_cap(video_devdata(file), isc->current_subdev->sd, a); +} + +static int isc_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *fsize) +{ + struct isc_device *isc = video_drvdata(file); + struct v4l2_subdev_frame_size_enum fse = { + .index = fsize->index, + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + int ret = -EINVAL; + int i; + + for (i = 0; i < isc->num_user_formats; i++) + if (isc->user_formats[i]->fourcc == fsize->pixel_format) + ret = 0; + + for (i = 0; i < ARRAY_SIZE(controller_formats); i++) + if (controller_formats[i].fourcc == fsize->pixel_format) + ret = 0; + + if (ret) + return ret; + + ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size, + NULL, &fse); + if (ret) + return ret; + + fse.code = isc->config.sd_format->mbus_code; + + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + fsize->discrete.width = fse.max_width; + fsize->discrete.height = fse.max_height; + + return 0; +} + +static int isc_enum_frameintervals(struct file *file, void *fh, + struct v4l2_frmivalenum *fival) +{ + struct isc_device *isc = video_drvdata(file); + struct v4l2_subdev_frame_interval_enum fie = { + .index = fival->index, + .width = fival->width, + .height = fival->height, + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + int ret = -EINVAL; + int i; + + for (i = 0; i < isc->num_user_formats; i++) + if (isc->user_formats[i]->fourcc == fival->pixel_format) + ret = 0; + + for (i = 0; i < ARRAY_SIZE(controller_formats); i++) + if (controller_formats[i].fourcc == fival->pixel_format) + ret = 0; + + if (ret) + return ret; + + ret = v4l2_subdev_call(isc->current_subdev->sd, pad, + enum_frame_interval, NULL, &fie); + if (ret) + return ret; + + fie.code = isc->config.sd_format->mbus_code; + fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; + fival->discrete = fie.interval; + + return 0; +} + +static const struct v4l2_ioctl_ops isc_ioctl_ops = { + .vidioc_querycap = isc_querycap, + .vidioc_enum_fmt_vid_cap = isc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = isc_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = isc_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = isc_try_fmt_vid_cap, + + .vidioc_enum_input = isc_enum_input, + .vidioc_g_input = isc_g_input, + .vidioc_s_input = isc_s_input, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + + .vidioc_g_parm = isc_g_parm, + .vidioc_s_parm = isc_s_parm, + .vidioc_enum_framesizes = isc_enum_framesizes, + .vidioc_enum_frameintervals = isc_enum_frameintervals, + + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static int isc_open(struct file *file) +{ + struct isc_device *isc = video_drvdata(file); + struct v4l2_subdev *sd = isc->current_subdev->sd; + int ret; + + if (mutex_lock_interruptible(&isc->lock)) + return -ERESTARTSYS; + + ret = v4l2_fh_open(file); + if (ret < 0) + goto unlock; + + if (!v4l2_fh_is_singular_file(file)) + goto unlock; + + ret = v4l2_subdev_call(sd, core, s_power, 1); + if (ret < 0 && ret != -ENOIOCTLCMD) { + v4l2_fh_release(file); + goto unlock; + } + + ret = isc_set_fmt(isc, &isc->fmt); + if (ret) { + v4l2_subdev_call(sd, core, s_power, 0); + v4l2_fh_release(file); + } + +unlock: + mutex_unlock(&isc->lock); + return ret; +} + +static int isc_release(struct file *file) +{ + struct isc_device *isc = video_drvdata(file); + struct v4l2_subdev *sd = isc->current_subdev->sd; + bool fh_singular; + int ret; + + mutex_lock(&isc->lock); + + fh_singular = v4l2_fh_is_singular_file(file); + + ret = _vb2_fop_release(file, NULL); + + if (fh_singular) + v4l2_subdev_call(sd, core, s_power, 0); + + mutex_unlock(&isc->lock); + + return ret; +} + +static const struct v4l2_file_operations isc_fops = { + .owner = THIS_MODULE, + .open = isc_open, + .release = isc_release, + .unlocked_ioctl = video_ioctl2, + .read = vb2_fop_read, + .mmap = vb2_fop_mmap, + .poll = vb2_fop_poll, +}; + +irqreturn_t isc_interrupt(int irq, void *dev_id) +{ + struct isc_device *isc = (struct isc_device *)dev_id; + struct regmap *regmap = isc->regmap; + u32 isc_intsr, isc_intmask, pending; + irqreturn_t ret = IRQ_NONE; + + regmap_read(regmap, ISC_INTSR, &isc_intsr); + regmap_read(regmap, ISC_INTMASK, &isc_intmask); + + pending = isc_intsr & isc_intmask; + + if (likely(pending & ISC_INT_DDONE)) { + spin_lock(&isc->dma_queue_lock); + if (isc->cur_frm) { + struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb; + struct vb2_buffer *vb = &vbuf->vb2_buf; + + vb->timestamp = ktime_get_ns(); + vbuf->sequence = isc->sequence++; + vb2_buffer_done(vb, VB2_BUF_STATE_DONE); + isc->cur_frm = NULL; + } + + if (!list_empty(&isc->dma_queue) && !isc->stop) { + isc->cur_frm = list_first_entry(&isc->dma_queue, + struct isc_buffer, list); + list_del(&isc->cur_frm->list); + + isc_start_dma(isc); + } + + if (isc->stop) + complete(&isc->comp); + + ret = IRQ_HANDLED; + spin_unlock(&isc->dma_queue_lock); + } + + if (pending & ISC_INT_HISDONE) { + schedule_work(&isc->awb_work); + ret = IRQ_HANDLED; + } + + return ret; +} + +static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max) +{ + struct regmap *regmap = isc->regmap; + struct isc_ctrls *ctrls = &isc->ctrls; + u32 *hist_count = &ctrls->hist_count[ctrls->hist_id]; + u32 *hist_entry = &ctrls->hist_entry[0]; + u32 i; + + *min = 0; + *max = HIST_ENTRIES; + + regmap_bulk_read(regmap, ISC_HIS_ENTRY, hist_entry, HIST_ENTRIES); + + *hist_count = 0; + /* + * we deliberately ignore the end of the histogram, + * the most white pixels + */ + for (i = 1; i < HIST_ENTRIES; i++) { + if (*hist_entry && !*min) + *min = i; + if (*hist_entry) + *max = i; + *hist_count += i * (*hist_entry++); + } + + if (!*min) + *min = 1; +} + +static void isc_wb_update(struct isc_ctrls *ctrls) +{ + u32 *hist_count = &ctrls->hist_count[0]; + u32 c, offset[4]; + u64 avg = 0; + /* We compute two gains, stretch gain and grey world gain */ + u32 s_gain[4], gw_gain[4]; + + /* + * According to Grey World, we need to set gains for R/B to normalize + * them towards the green channel. + * Thus we want to keep Green as fixed and adjust only Red/Blue + * Compute the average of the both green channels first + */ + avg = (u64)hist_count[ISC_HIS_CFG_MODE_GR] + + (u64)hist_count[ISC_HIS_CFG_MODE_GB]; + avg >>= 1; + + /* Green histogram is null, nothing to do */ + if (!avg) + return; + + for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) { + /* + * the color offset is the minimum value of the histogram. + * we stretch this color to the full range by substracting + * this value from the color component. + */ + offset[c] = ctrls->hist_minmax[c][HIST_MIN_INDEX]; + /* + * The offset is always at least 1. If the offset is 1, we do + * not need to adjust it, so our result must be zero. + * the offset is computed in a histogram on 9 bits (0..512) + * but the offset in register is based on + * 12 bits pipeline (0..4096). + * we need to shift with the 3 bits that the histogram is + * ignoring + */ + ctrls->offset[c] = (offset[c] - 1) << 3; + + /* the offset is then taken and converted to 2's complements */ + if (!ctrls->offset[c]) + ctrls->offset[c] = ISC_WB_O_ZERO_VAL; + + /* + * the stretch gain is the total number of histogram bins + * divided by the actual range of color component (Max - Min) + * If we compute gain like this, the actual color component + * will be stretched to the full histogram. + * We need to shift 9 bits for precision, we have 9 bits for + * decimals + */ + s_gain[c] = (HIST_ENTRIES << 9) / + (ctrls->hist_minmax[c][HIST_MAX_INDEX] - + ctrls->hist_minmax[c][HIST_MIN_INDEX] + 1); + + /* + * Now we have to compute the gain w.r.t. the average. + * Add/lose gain to the component towards the average. + * If it happens that the component is zero, use the + * fixed point value : 1.0 gain. + */ + if (hist_count[c]) + gw_gain[c] = div_u64(avg << 9, hist_count[c]); + else + gw_gain[c] = 1 << 9; + + /* multiply both gains and adjust for decimals */ + ctrls->gain[c] = s_gain[c] * gw_gain[c]; + ctrls->gain[c] >>= 9; + } +} + +static void isc_awb_work(struct work_struct *w) +{ + struct isc_device *isc = + container_of(w, struct isc_device, awb_work); + struct regmap *regmap = isc->regmap; + struct isc_ctrls *ctrls = &isc->ctrls; + u32 hist_id = ctrls->hist_id; + u32 baysel; + unsigned long flags; + u32 min, max; + + /* streaming is not active anymore */ + if (isc->stop) + return; + + if (ctrls->hist_stat != HIST_ENABLED) + return; + + isc_hist_count(isc, &min, &max); + ctrls->hist_minmax[hist_id][HIST_MIN_INDEX] = min; + ctrls->hist_minmax[hist_id][HIST_MAX_INDEX] = max; + + if (hist_id != ISC_HIS_CFG_MODE_B) { + hist_id++; + } else { + isc_wb_update(ctrls); + hist_id = ISC_HIS_CFG_MODE_GR; + } + + ctrls->hist_id = hist_id; + baysel = isc->config.sd_format->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT; + + /* if no more auto white balance, reset controls. */ + if (ctrls->awb == ISC_WB_NONE) + isc_reset_awb_ctrls(isc); + + pm_runtime_get_sync(isc->dev); + + /* + * only update if we have all the required histograms and controls + * if awb has been disabled, we need to reset registers as well. + */ + if (hist_id == ISC_HIS_CFG_MODE_GR || ctrls->awb == ISC_WB_NONE) { + /* + * It may happen that DMA Done IRQ will trigger while we are + * updating white balance registers here. + * In that case, only parts of the controls have been updated. + * We can avoid that by locking the section. + */ + spin_lock_irqsave(&isc->awb_lock, flags); + isc_update_awb_ctrls(isc); + spin_unlock_irqrestore(&isc->awb_lock, flags); + + /* + * if we are doing just the one time white balance adjustment, + * we are basically done. + */ + if (ctrls->awb == ISC_WB_ONETIME) { + v4l2_info(&isc->v4l2_dev, + "Completed one time white-balance adjustment.\n"); + ctrls->awb = ISC_WB_NONE; + } + } + regmap_write(regmap, ISC_HIS_CFG, hist_id | baysel | ISC_HIS_CFG_RAR); + isc_update_profile(isc); + /* if awb has been disabled, we don't need to start another histogram */ + if (ctrls->awb) + regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ); + + pm_runtime_put_sync(isc->dev); +} + +static int isc_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct isc_device *isc = container_of(ctrl->handler, + struct isc_device, ctrls.handler); + struct isc_ctrls *ctrls = &isc->ctrls; + + if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) + return 0; + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + ctrls->brightness = ctrl->val & ISC_CBC_BRIGHT_MASK; + break; + case V4L2_CID_CONTRAST: + ctrls->contrast = ctrl->val & ISC_CBC_CONTRAST_MASK; + break; + case V4L2_CID_GAMMA: + ctrls->gamma_index = ctrl->val; + break; + case V4L2_CID_AUTO_WHITE_BALANCE: + if (ctrl->val == 1) + ctrls->awb = ISC_WB_AUTO; + else + ctrls->awb = ISC_WB_NONE; + + /* we did not configure ISC yet */ + if (!isc->config.sd_format) + break; + + if (ctrls->hist_stat != HIST_ENABLED) + isc_reset_awb_ctrls(isc); + + if (isc->ctrls.awb == ISC_WB_AUTO && + vb2_is_streaming(&isc->vb2_vidq) && + ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) + isc_set_histogram(isc, true); + + break; + case V4L2_CID_DO_WHITE_BALANCE: + /* if AWB is enabled, do nothing */ + if (ctrls->awb == ISC_WB_AUTO) + return 0; + + ctrls->awb = ISC_WB_ONETIME; + isc_set_histogram(isc, true); + v4l2_dbg(1, debug, &isc->v4l2_dev, + "One time white-balance started.\n"); + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct v4l2_ctrl_ops isc_ctrl_ops = { + .s_ctrl = isc_s_ctrl, +}; + +static int isc_ctrl_init(struct isc_device *isc) +{ + const struct v4l2_ctrl_ops *ops = &isc_ctrl_ops; + struct isc_ctrls *ctrls = &isc->ctrls; + struct v4l2_ctrl_handler *hdl = &ctrls->handler; + int ret; + + ctrls->hist_stat = HIST_INIT; + isc_reset_awb_ctrls(isc); + + ret = v4l2_ctrl_handler_init(hdl, 5); + if (ret < 0) + return ret; + + ctrls->brightness = 0; + ctrls->contrast = 256; + + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0); + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256); + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, GAMMA_MAX, 1, 2); + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); + + /* do_white_balance is a button, so min,max,step,default are ignored */ + isc->do_wb_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_DO_WHITE_BALANCE, + 0, 0, 0, 0); + + v4l2_ctrl_activate(isc->do_wb_ctrl, false); + + v4l2_ctrl_handler_setup(hdl); + + return 0; +} + +static int isc_async_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct isc_device *isc = container_of(notifier->v4l2_dev, + struct isc_device, v4l2_dev); + struct isc_subdev_entity *subdev_entity = + container_of(notifier, struct isc_subdev_entity, notifier); + + if (video_is_registered(&isc->video_dev)) { + v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n"); + return -EBUSY; + } + + subdev_entity->sd = subdev; + + return 0; +} + +static void isc_async_unbind(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct isc_device *isc = container_of(notifier->v4l2_dev, + struct isc_device, v4l2_dev); + cancel_work_sync(&isc->awb_work); + video_unregister_device(&isc->video_dev); + v4l2_ctrl_handler_free(&isc->ctrls.handler); +} + +static struct isc_format *find_format_by_code(unsigned int code, int *index) +{ + struct isc_format *fmt = &formats_list[0]; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(formats_list); i++) { + if (fmt->mbus_code == code) { + *index = i; + return fmt; + } + + fmt++; + } + + return NULL; +} + +static int isc_formats_init(struct isc_device *isc) +{ + struct isc_format *fmt; + struct v4l2_subdev *subdev = isc->current_subdev->sd; + unsigned int num_fmts, i, j; + u32 list_size = ARRAY_SIZE(formats_list); + struct v4l2_subdev_mbus_code_enum mbus_code = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + + num_fmts = 0; + while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, + NULL, &mbus_code)) { + mbus_code.index++; + + fmt = find_format_by_code(mbus_code.code, &i); + if (!fmt) { + v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n", + mbus_code.code); + continue; + } + + fmt->sd_support = true; + num_fmts++; + } + + if (!num_fmts) + return -ENXIO; + + isc->num_user_formats = num_fmts; + isc->user_formats = devm_kcalloc(isc->dev, + num_fmts, sizeof(*isc->user_formats), + GFP_KERNEL); + if (!isc->user_formats) + return -ENOMEM; + + fmt = &formats_list[0]; + for (i = 0, j = 0; i < list_size; i++) { + if (fmt->sd_support) + isc->user_formats[j++] = fmt; + fmt++; + } + + return 0; +} + +static int isc_set_default_fmt(struct isc_device *isc) +{ + struct v4l2_format f = { + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .fmt.pix = { + .width = VGA_WIDTH, + .height = VGA_HEIGHT, + .field = V4L2_FIELD_NONE, + .pixelformat = isc->user_formats[0]->fourcc, + }, + }; + int ret; + + ret = isc_try_fmt(isc, &f, NULL); + if (ret) + return ret; + + isc->fmt = f; + return 0; +} + +static int isc_async_complete(struct v4l2_async_notifier *notifier) +{ + struct isc_device *isc = container_of(notifier->v4l2_dev, + struct isc_device, v4l2_dev); + struct video_device *vdev = &isc->video_dev; + struct vb2_queue *q = &isc->vb2_vidq; + int ret; + + INIT_WORK(&isc->awb_work, isc_awb_work); + + ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev); + if (ret < 0) { + v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n"); + return ret; + } + + isc->current_subdev = container_of(notifier, + struct isc_subdev_entity, notifier); + mutex_init(&isc->lock); + init_completion(&isc->comp); + + /* Initialize videobuf2 queue */ + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; + q->drv_priv = isc; + q->buf_struct_size = sizeof(struct isc_buffer); + q->ops = &isc_vb2_ops; + q->mem_ops = &vb2_dma_contig_memops; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->lock = &isc->lock; + q->min_buffers_needed = 1; + q->dev = isc->dev; + + ret = vb2_queue_init(q); + if (ret < 0) { + v4l2_err(&isc->v4l2_dev, + "vb2_queue_init() failed: %d\n", ret); + return ret; + } + + /* Init video dma queues */ + INIT_LIST_HEAD(&isc->dma_queue); + spin_lock_init(&isc->dma_queue_lock); + spin_lock_init(&isc->awb_lock); + + ret = isc_formats_init(isc); + if (ret < 0) { + v4l2_err(&isc->v4l2_dev, + "Init format failed: %d\n", ret); + return ret; + } + + ret = isc_set_default_fmt(isc); + if (ret) { + v4l2_err(&isc->v4l2_dev, "Could not set default format\n"); + return ret; + } + + ret = isc_ctrl_init(isc); + if (ret) { + v4l2_err(&isc->v4l2_dev, "Init isc ctrols failed: %d\n", ret); + return ret; + } + + /* Register video device */ + strscpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name)); + vdev->release = video_device_release_empty; + vdev->fops = &isc_fops; + vdev->ioctl_ops = &isc_ioctl_ops; + vdev->v4l2_dev = &isc->v4l2_dev; + vdev->vfl_dir = VFL_DIR_RX; + vdev->queue = q; + vdev->lock = &isc->lock; + vdev->ctrl_handler = &isc->ctrls.handler; + vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE; + video_set_drvdata(vdev, isc); + + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + v4l2_err(&isc->v4l2_dev, + "video_register_device failed: %d\n", ret); + return ret; + } + + return 0; +} + +const struct v4l2_async_notifier_operations isc_async_ops = { + .bound = isc_async_bound, + .unbind = isc_async_unbind, + .complete = isc_async_complete, +}; + +void isc_subdev_cleanup(struct isc_device *isc) +{ + struct isc_subdev_entity *subdev_entity; + + list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { + v4l2_async_notifier_unregister(&subdev_entity->notifier); + v4l2_async_notifier_cleanup(&subdev_entity->notifier); + } + + INIT_LIST_HEAD(&isc->subdev_entities); +} + +int isc_pipeline_init(struct isc_device *isc) +{ + struct device *dev = isc->dev; + struct regmap *regmap = isc->regmap; + struct regmap_field *regs; + unsigned int i; + + /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */ + const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = { + REG_FIELD(ISC_WB_CTRL, 0, 0), + REG_FIELD(ISC_CFA_CTRL, 0, 0), + REG_FIELD(ISC_CC_CTRL, 0, 0), + REG_FIELD(ISC_GAM_CTRL, 0, 0), + REG_FIELD(ISC_GAM_CTRL, 1, 1), + REG_FIELD(ISC_GAM_CTRL, 2, 2), + REG_FIELD(ISC_GAM_CTRL, 3, 3), + REG_FIELD(ISC_CSC_CTRL, 0, 0), + REG_FIELD(ISC_CBC_CTRL, 0, 0), + REG_FIELD(ISC_SUB422_CTRL, 0, 0), + REG_FIELD(ISC_SUB420_CTRL, 0, 0), + }; + + for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) { + regs = devm_regmap_field_alloc(dev, regmap, regfields[i]); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + isc->pipeline[i] = regs; + } + + return 0; +} + +/* regmap configuration */ +#define ATMEL_ISC_REG_MAX 0xbfc +const struct regmap_config isc_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = ATMEL_ISC_REG_MAX, +}; + diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c deleted file mode 100644 index da3b441..0000000 --- a/drivers/media/platform/atmel/atmel-isc.c +++ /dev/null @@ -1,2634 +0,0 @@ -/* - * Atmel Image Sensor Controller (ISC) driver - * - * Copyright (C) 2016 Atmel - * - * Author: Songjun Wu - * - * This program is free software; you may redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA - * - * ISC video pipeline integrates the following submodules: - * PFE: Parallel Front End to sample the camera sensor input stream - * WB: Programmable white balance in the Bayer domain - * CFA: Color filter array interpolation module - * CC: Programmable color correction - * GAM: Gamma correction - * CSC: Programmable color space conversion - * CBC: Contrast and Brightness control - * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling - * RLP: This module performs rounding, range limiting - * and packing of the incoming data - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include - -#include "atmel-isc-regs.h" - -#define ATMEL_ISC_NAME "atmel_isc" - -#define ISC_MAX_SUPPORT_WIDTH 2592 -#define ISC_MAX_SUPPORT_HEIGHT 1944 - -#define ISC_CLK_MAX_DIV 255 - -enum isc_clk_id { - ISC_ISPCK = 0, - ISC_MCK = 1, -}; - -struct isc_clk { - struct clk_hw hw; - struct clk *clk; - struct regmap *regmap; - spinlock_t lock; - u8 id; - u8 parent_id; - u32 div; - struct device *dev; -}; - -#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw) - -struct isc_buffer { - struct vb2_v4l2_buffer vb; - struct list_head list; -}; - -struct isc_subdev_entity { - struct v4l2_subdev *sd; - struct v4l2_async_subdev *asd; - struct v4l2_async_notifier notifier; - - u32 pfe_cfg0; - - struct list_head list; -}; - -/* - * struct isc_format - ISC media bus format information - This structure represents the interface between the ISC - and the sensor. It's the input format received by - the ISC. - * @fourcc: Fourcc code for this format - * @mbus_code: V4L2 media bus format code. - * @cfa_baycfg: If this format is RAW BAYER, indicate the type of bayer. - this is either BGBG, RGRG, etc. - * @pfe_cfg0_bps: Number of hardware data lines connected to the ISC - */ - -struct isc_format { - u32 fourcc; - u32 mbus_code; - u32 cfa_baycfg; - - bool sd_support; - u32 pfe_cfg0_bps; -}; - -/* Pipeline bitmap */ -#define WB_ENABLE BIT(0) -#define CFA_ENABLE BIT(1) -#define CC_ENABLE BIT(2) -#define GAM_ENABLE BIT(3) -#define GAM_BENABLE BIT(4) -#define GAM_GENABLE BIT(5) -#define GAM_RENABLE BIT(6) -#define CSC_ENABLE BIT(7) -#define CBC_ENABLE BIT(8) -#define SUB422_ENABLE BIT(9) -#define SUB420_ENABLE BIT(10) - -#define GAM_ENABLES (GAM_RENABLE | GAM_GENABLE | GAM_BENABLE | GAM_ENABLE) - -/* - * struct fmt_config - ISC format configuration and internal pipeline - This structure represents the internal configuration - of the ISC. - It also holds the format that ISC will present to v4l2. - * @sd_format: Pointer to an isc_format struct that holds the sensor - configuration. - * @fourcc: Fourcc code for this format. - * @bpp: Bytes per pixel in the current format. - * @rlp_cfg_mode: Configuration of the RLP (rounding, limiting packaging) - * @dcfg_imode: Configuration of the input of the DMA module - * @dctrl_dview: Configuration of the output of the DMA module - * @bits_pipeline: Configuration of the pipeline, which modules are enabled - */ -struct fmt_config { - struct isc_format *sd_format; - - u32 fourcc; - u8 bpp; - - u32 rlp_cfg_mode; - u32 dcfg_imode; - u32 dctrl_dview; - - u32 bits_pipeline; -}; - -#define HIST_ENTRIES 512 -#define HIST_BAYER (ISC_HIS_CFG_MODE_B + 1) - -enum{ - HIST_INIT = 0, - HIST_ENABLED, - HIST_DISABLED, -}; - -struct isc_ctrls { - struct v4l2_ctrl_handler handler; - - u32 brightness; - u32 contrast; - u8 gamma_index; -#define ISC_WB_NONE 0 -#define ISC_WB_AUTO 1 -#define ISC_WB_ONETIME 2 - u8 awb; - - /* one for each component : GR, R, GB, B */ - u32 gain[HIST_BAYER]; - u32 offset[HIST_BAYER]; - - u32 hist_entry[HIST_ENTRIES]; - u32 hist_count[HIST_BAYER]; - u8 hist_id; - u8 hist_stat; -#define HIST_MIN_INDEX 0 -#define HIST_MAX_INDEX 1 - u32 hist_minmax[HIST_BAYER][2]; -}; - -#define ISC_PIPE_LINE_NODE_NUM 11 - -struct isc_device { - struct regmap *regmap; - struct clk *hclock; - struct clk *ispck; - struct isc_clk isc_clks[2]; - - struct device *dev; - struct v4l2_device v4l2_dev; - struct video_device video_dev; - - struct vb2_queue vb2_vidq; - spinlock_t dma_queue_lock; - struct list_head dma_queue; - struct isc_buffer *cur_frm; - unsigned int sequence; - bool stop; - struct completion comp; - - struct v4l2_format fmt; - struct isc_format **user_formats; - unsigned int num_user_formats; - - struct fmt_config config; - struct fmt_config try_config; - - struct isc_ctrls ctrls; - struct v4l2_ctrl *do_wb_ctrl; - struct work_struct awb_work; - - struct mutex lock; - spinlock_t awb_lock; - - struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM]; - - struct isc_subdev_entity *current_subdev; - struct list_head subdev_entities; -}; - -/* This is a list of the formats that the ISC can *output* */ -static struct isc_format controller_formats[] = { - { - .fourcc = V4L2_PIX_FMT_ARGB444, - }, - { - .fourcc = V4L2_PIX_FMT_ARGB555, - }, - { - .fourcc = V4L2_PIX_FMT_RGB565, - }, - { - .fourcc = V4L2_PIX_FMT_ABGR32, - }, - { - .fourcc = V4L2_PIX_FMT_XBGR32, - }, - { - .fourcc = V4L2_PIX_FMT_YUV420, - }, - { - .fourcc = V4L2_PIX_FMT_YUYV, - }, - { - .fourcc = V4L2_PIX_FMT_YUV422P, - }, - { - .fourcc = V4L2_PIX_FMT_GREY, - }, -}; - -/* This is a list of formats that the ISC can receive as *input* */ -static struct isc_format formats_list[] = { - { - .fourcc = V4L2_PIX_FMT_SBGGR8, - .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, - .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, - .cfa_baycfg = ISC_BAY_CFG_BGBG, - }, - { - .fourcc = V4L2_PIX_FMT_SGBRG8, - .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8, - .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, - .cfa_baycfg = ISC_BAY_CFG_GBGB, - }, - { - .fourcc = V4L2_PIX_FMT_SGRBG8, - .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8, - .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, - .cfa_baycfg = ISC_BAY_CFG_GRGR, - }, - { - .fourcc = V4L2_PIX_FMT_SRGGB8, - .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8, - .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, - .cfa_baycfg = ISC_BAY_CFG_RGRG, - }, - { - .fourcc = V4L2_PIX_FMT_SBGGR10, - .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10, - .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, - .cfa_baycfg = ISC_BAY_CFG_RGRG, - }, - { - .fourcc = V4L2_PIX_FMT_SGBRG10, - .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10, - .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, - .cfa_baycfg = ISC_BAY_CFG_GBGB, - }, - { - .fourcc = V4L2_PIX_FMT_SGRBG10, - .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10, - .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, - .cfa_baycfg = ISC_BAY_CFG_GRGR, - }, - { - .fourcc = V4L2_PIX_FMT_SRGGB10, - .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10, - .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, - .cfa_baycfg = ISC_BAY_CFG_RGRG, - }, - { - .fourcc = V4L2_PIX_FMT_SBGGR12, - .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12, - .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, - .cfa_baycfg = ISC_BAY_CFG_BGBG, - }, - { - .fourcc = V4L2_PIX_FMT_SGBRG12, - .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12, - .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, - .cfa_baycfg = ISC_BAY_CFG_GBGB, - }, - { - .fourcc = V4L2_PIX_FMT_SGRBG12, - .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12, - .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, - .cfa_baycfg = ISC_BAY_CFG_GRGR, - }, - { - .fourcc = V4L2_PIX_FMT_SRGGB12, - .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12, - .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, - .cfa_baycfg = ISC_BAY_CFG_RGRG, - }, - { - .fourcc = V4L2_PIX_FMT_GREY, - .mbus_code = MEDIA_BUS_FMT_Y8_1X8, - .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, - }, - { - .fourcc = V4L2_PIX_FMT_YUYV, - .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, - .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, - }, - { - .fourcc = V4L2_PIX_FMT_RGB565, - .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE, - .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, - }, -}; - -#define GAMMA_MAX 2 -#define GAMMA_ENTRIES 64 - -/* Gamma table with gamma 1/2.2 */ -static const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES] = { - /* 0 --> gamma 1/1.8 */ - { 0x65, 0x66002F, 0x950025, 0xBB0020, 0xDB001D, 0xF8001A, - 0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012, - 0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F, - 0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E, - 0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C, - 0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B, - 0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A, - 0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A, - 0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A, - 0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009, - 0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 }, - - /* 1 --> gamma 1/2 */ - { 0x7F, 0x800034, 0xB50028, 0xDE0021, 0x100001E, 0x11E001B, - 0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013, - 0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F, - 0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D, - 0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B, - 0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A, - 0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A, - 0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009, - 0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009, - 0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009, - 0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 }, - - /* 2 --> gamma 1/2.2 */ - { 0x99, 0x9B0038, 0xD4002A, 0xFF0023, 0x122001F, 0x141001B, - 0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012, - 0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F, - 0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C, - 0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B, - 0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A, - 0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009, - 0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009, - 0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008, - 0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007, - 0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 }, -}; - -#define ISC_IS_FORMAT_RAW(mbus_code) \ - (((mbus_code) & 0xf000) == 0x3000) - -static unsigned int debug; -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "debug level (0-2)"); - -static unsigned int sensor_preferred = 1; -module_param(sensor_preferred, uint, 0644); -MODULE_PARM_DESC(sensor_preferred, - "Sensor is preferred to output the specified format (1-on 0-off), default 1"); - -static inline void isc_update_awb_ctrls(struct isc_device *isc) -{ - struct isc_ctrls *ctrls = &isc->ctrls; - - regmap_write(isc->regmap, ISC_WB_O_RGR, - (ISC_WB_O_ZERO_VAL - (ctrls->offset[ISC_HIS_CFG_MODE_R])) | - ((ISC_WB_O_ZERO_VAL - ctrls->offset[ISC_HIS_CFG_MODE_GR]) << 16)); - regmap_write(isc->regmap, ISC_WB_O_BGB, - (ISC_WB_O_ZERO_VAL - (ctrls->offset[ISC_HIS_CFG_MODE_B])) | - ((ISC_WB_O_ZERO_VAL - ctrls->offset[ISC_HIS_CFG_MODE_GB]) << 16)); - regmap_write(isc->regmap, ISC_WB_G_RGR, - ctrls->gain[ISC_HIS_CFG_MODE_R] | - (ctrls->gain[ISC_HIS_CFG_MODE_GR] << 16)); - regmap_write(isc->regmap, ISC_WB_G_BGB, - ctrls->gain[ISC_HIS_CFG_MODE_B] | - (ctrls->gain[ISC_HIS_CFG_MODE_GB] << 16)); -} - -static inline void isc_reset_awb_ctrls(struct isc_device *isc) -{ - int c; - - for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) { - /* gains have a fixed point at 9 decimals */ - isc->ctrls.gain[c] = 1 << 9; - /* offsets are in 2's complements, the value - * will be substracted from ISC_WB_O_ZERO_VAL to obtain - * 2's complement of a value between 0 and - * ISC_WB_O_ZERO_VAL >> 1 - */ - isc->ctrls.offset[c] = ISC_WB_O_ZERO_VAL; - } -} - -static int isc_wait_clk_stable(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - struct regmap *regmap = isc_clk->regmap; - unsigned long timeout = jiffies + usecs_to_jiffies(1000); - unsigned int status; - - while (time_before(jiffies, timeout)) { - regmap_read(regmap, ISC_CLKSR, &status); - if (!(status & ISC_CLKSR_SIP)) - return 0; - - usleep_range(10, 250); - } - - return -ETIMEDOUT; -} - -static int isc_clk_prepare(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - - if (isc_clk->id == ISC_ISPCK) - pm_runtime_get_sync(isc_clk->dev); - - return isc_wait_clk_stable(hw); -} - -static void isc_clk_unprepare(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - - isc_wait_clk_stable(hw); - - if (isc_clk->id == ISC_ISPCK) - pm_runtime_put_sync(isc_clk->dev); -} - -static int isc_clk_enable(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - u32 id = isc_clk->id; - struct regmap *regmap = isc_clk->regmap; - unsigned long flags; - unsigned int status; - - dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n", - __func__, isc_clk->div, isc_clk->parent_id); - - spin_lock_irqsave(&isc_clk->lock, flags); - regmap_update_bits(regmap, ISC_CLKCFG, - ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id), - (isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) | - (isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id))); - - regmap_write(regmap, ISC_CLKEN, ISC_CLK(id)); - spin_unlock_irqrestore(&isc_clk->lock, flags); - - regmap_read(regmap, ISC_CLKSR, &status); - if (status & ISC_CLK(id)) - return 0; - else - return -EINVAL; -} - -static void isc_clk_disable(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - u32 id = isc_clk->id; - unsigned long flags; - - spin_lock_irqsave(&isc_clk->lock, flags); - regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id)); - spin_unlock_irqrestore(&isc_clk->lock, flags); -} - -static int isc_clk_is_enabled(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - u32 status; - - if (isc_clk->id == ISC_ISPCK) - pm_runtime_get_sync(isc_clk->dev); - - regmap_read(isc_clk->regmap, ISC_CLKSR, &status); - - if (isc_clk->id == ISC_ISPCK) - pm_runtime_put_sync(isc_clk->dev); - - return status & ISC_CLK(isc_clk->id) ? 1 : 0; -} - -static unsigned long -isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - - return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1); -} - -static int isc_clk_determine_rate(struct clk_hw *hw, - struct clk_rate_request *req) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - long best_rate = -EINVAL; - int best_diff = -1; - unsigned int i, div; - - for (i = 0; i < clk_hw_get_num_parents(hw); i++) { - struct clk_hw *parent; - unsigned long parent_rate; - - parent = clk_hw_get_parent_by_index(hw, i); - if (!parent) - continue; - - parent_rate = clk_hw_get_rate(parent); - if (!parent_rate) - continue; - - for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) { - unsigned long rate; - int diff; - - rate = DIV_ROUND_CLOSEST(parent_rate, div); - diff = abs(req->rate - rate); - - if (best_diff < 0 || best_diff > diff) { - best_rate = rate; - best_diff = diff; - req->best_parent_rate = parent_rate; - req->best_parent_hw = parent; - } - - if (!best_diff || rate < req->rate) - break; - } - - if (!best_diff) - break; - } - - dev_dbg(isc_clk->dev, - "ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n", - __func__, best_rate, - __clk_get_name((req->best_parent_hw)->clk), - req->best_parent_rate); - - if (best_rate < 0) - return best_rate; - - req->rate = best_rate; - - return 0; -} - -static int isc_clk_set_parent(struct clk_hw *hw, u8 index) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - - if (index >= clk_hw_get_num_parents(hw)) - return -EINVAL; - - isc_clk->parent_id = index; - - return 0; -} - -static u8 isc_clk_get_parent(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - - return isc_clk->parent_id; -} - -static int isc_clk_set_rate(struct clk_hw *hw, - unsigned long rate, - unsigned long parent_rate) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - u32 div; - - if (!rate) - return -EINVAL; - - div = DIV_ROUND_CLOSEST(parent_rate, rate); - if (div > (ISC_CLK_MAX_DIV + 1) || !div) - return -EINVAL; - - isc_clk->div = div - 1; - - return 0; -} - -static const struct clk_ops isc_clk_ops = { - .prepare = isc_clk_prepare, - .unprepare = isc_clk_unprepare, - .enable = isc_clk_enable, - .disable = isc_clk_disable, - .is_enabled = isc_clk_is_enabled, - .recalc_rate = isc_clk_recalc_rate, - .determine_rate = isc_clk_determine_rate, - .set_parent = isc_clk_set_parent, - .get_parent = isc_clk_get_parent, - .set_rate = isc_clk_set_rate, -}; - -static int isc_clk_register(struct isc_device *isc, unsigned int id) -{ - struct regmap *regmap = isc->regmap; - struct device_node *np = isc->dev->of_node; - struct isc_clk *isc_clk; - struct clk_init_data init; - const char *clk_name = np->name; - const char *parent_names[3]; - int num_parents; - - num_parents = of_clk_get_parent_count(np); - if (num_parents < 1 || num_parents > 3) - return -EINVAL; - - if (num_parents > 2 && id == ISC_ISPCK) - num_parents = 2; - - of_clk_parent_fill(np, parent_names, num_parents); - - if (id == ISC_MCK) - of_property_read_string(np, "clock-output-names", &clk_name); - else - clk_name = "isc-ispck"; - - init.parent_names = parent_names; - init.num_parents = num_parents; - init.name = clk_name; - init.ops = &isc_clk_ops; - init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; - - isc_clk = &isc->isc_clks[id]; - isc_clk->hw.init = &init; - isc_clk->regmap = regmap; - isc_clk->id = id; - isc_clk->dev = isc->dev; - spin_lock_init(&isc_clk->lock); - - isc_clk->clk = clk_register(isc->dev, &isc_clk->hw); - if (IS_ERR(isc_clk->clk)) { - dev_err(isc->dev, "%s: clock register fail\n", clk_name); - return PTR_ERR(isc_clk->clk); - } else if (id == ISC_MCK) - of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk); - - return 0; -} - -static int isc_clk_init(struct isc_device *isc) -{ - unsigned int i; - int ret; - - for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) - isc->isc_clks[i].clk = ERR_PTR(-EINVAL); - - for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) { - ret = isc_clk_register(isc, i); - if (ret) - return ret; - } - - return 0; -} - -static void isc_clk_cleanup(struct isc_device *isc) -{ - unsigned int i; - - of_clk_del_provider(isc->dev->of_node); - - for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) { - struct isc_clk *isc_clk = &isc->isc_clks[i]; - - if (!IS_ERR(isc_clk->clk)) - clk_unregister(isc_clk->clk); - } -} - -static int isc_queue_setup(struct vb2_queue *vq, - unsigned int *nbuffers, unsigned int *nplanes, - unsigned int sizes[], struct device *alloc_devs[]) -{ - struct isc_device *isc = vb2_get_drv_priv(vq); - unsigned int size = isc->fmt.fmt.pix.sizeimage; - - if (*nplanes) - return sizes[0] < size ? -EINVAL : 0; - - *nplanes = 1; - sizes[0] = size; - - return 0; -} - -static int isc_buffer_prepare(struct vb2_buffer *vb) -{ - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); - struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue); - unsigned long size = isc->fmt.fmt.pix.sizeimage; - - if (vb2_plane_size(vb, 0) < size) { - v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n", - vb2_plane_size(vb, 0), size); - return -EINVAL; - } - - vb2_set_plane_payload(vb, 0, size); - - vbuf->field = isc->fmt.fmt.pix.field; - - return 0; -} - -static void isc_start_dma(struct isc_device *isc) -{ - struct regmap *regmap = isc->regmap; - u32 sizeimage = isc->fmt.fmt.pix.sizeimage; - u32 dctrl_dview; - dma_addr_t addr0; - u32 h, w; - - h = isc->fmt.fmt.pix.height; - w = isc->fmt.fmt.pix.width; - - /* - * In case the sensor is not RAW, it will output a pixel (12-16 bits) - * with two samples on the ISC Data bus (which is 8-12) - * ISC will count each sample, so, we need to multiply these values - * by two, to get the real number of samples for the required pixels. - */ - if (!ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) { - h <<= 1; - w <<= 1; - } - - /* - * We limit the column/row count that the ISC will output according - * to the configured resolution that we want. - * This will avoid the situation where the sensor is misconfigured, - * sending more data, and the ISC will just take it and DMA to memory, - * causing corruption. - */ - regmap_write(regmap, ISC_PFE_CFG1, - (ISC_PFE_CFG1_COLMIN(0) & ISC_PFE_CFG1_COLMIN_MASK) | - (ISC_PFE_CFG1_COLMAX(w - 1) & ISC_PFE_CFG1_COLMAX_MASK)); - - regmap_write(regmap, ISC_PFE_CFG2, - (ISC_PFE_CFG2_ROWMIN(0) & ISC_PFE_CFG2_ROWMIN_MASK) | - (ISC_PFE_CFG2_ROWMAX(h - 1) & ISC_PFE_CFG2_ROWMAX_MASK)); - - regmap_update_bits(regmap, ISC_PFE_CFG0, - ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN, - ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN); - - addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0); - regmap_write(regmap, ISC_DAD0, addr0); - - switch (isc->config.fourcc) { - case V4L2_PIX_FMT_YUV420: - regmap_write(regmap, ISC_DAD1, addr0 + (sizeimage * 2) / 3); - regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 5) / 6); - break; - case V4L2_PIX_FMT_YUV422P: - regmap_write(regmap, ISC_DAD1, addr0 + sizeimage / 2); - regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 3) / 4); - break; - default: - break; - } - - dctrl_dview = isc->config.dctrl_dview; - - regmap_write(regmap, ISC_DCTRL, dctrl_dview | ISC_DCTRL_IE_IS); - spin_lock(&isc->awb_lock); - regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE); - spin_unlock(&isc->awb_lock); -} - -static void isc_set_pipeline(struct isc_device *isc, u32 pipeline) -{ - struct regmap *regmap = isc->regmap; - struct isc_ctrls *ctrls = &isc->ctrls; - u32 val, bay_cfg; - const u32 *gamma; - unsigned int i; - - /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */ - for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) { - val = pipeline & BIT(i) ? 1 : 0; - regmap_field_write(isc->pipeline[i], val); - } - - if (!pipeline) - return; - - bay_cfg = isc->config.sd_format->cfa_baycfg; - - if (ctrls->awb == ISC_WB_NONE) - isc_reset_awb_ctrls(isc); - - regmap_write(regmap, ISC_WB_CFG, bay_cfg); - isc_update_awb_ctrls(isc); - - regmap_write(regmap, ISC_CFA_CFG, bay_cfg | ISC_CFA_CFG_EITPOL); - - gamma = &isc_gamma_table[ctrls->gamma_index][0]; - regmap_bulk_write(regmap, ISC_GAM_BENTRY, gamma, GAMMA_ENTRIES); - regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES); - regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES); - - /* Convert RGB to YUV */ - regmap_write(regmap, ISC_CSC_YR_YG, 0x42 | (0x81 << 16)); - regmap_write(regmap, ISC_CSC_YB_OY, 0x19 | (0x10 << 16)); - regmap_write(regmap, ISC_CSC_CBR_CBG, 0xFDA | (0xFB6 << 16)); - regmap_write(regmap, ISC_CSC_CBB_OCB, 0x70 | (0x80 << 16)); - regmap_write(regmap, ISC_CSC_CRR_CRG, 0x70 | (0xFA2 << 16)); - regmap_write(regmap, ISC_CSC_CRB_OCR, 0xFEE | (0x80 << 16)); - - regmap_write(regmap, ISC_CBC_BRIGHT, ctrls->brightness); - regmap_write(regmap, ISC_CBC_CONTRAST, ctrls->contrast); -} - -static int isc_update_profile(struct isc_device *isc) -{ - struct regmap *regmap = isc->regmap; - u32 sr; - int counter = 100; - - regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO); - - regmap_read(regmap, ISC_CTRLSR, &sr); - while ((sr & ISC_CTRL_UPPRO) && counter--) { - usleep_range(1000, 2000); - regmap_read(regmap, ISC_CTRLSR, &sr); - } - - if (counter < 0) { - v4l2_warn(&isc->v4l2_dev, "Time out to update profile\n"); - return -ETIMEDOUT; - } - - return 0; -} - -static void isc_set_histogram(struct isc_device *isc, bool enable) -{ - struct regmap *regmap = isc->regmap; - struct isc_ctrls *ctrls = &isc->ctrls; - - if (enable) { - regmap_write(regmap, ISC_HIS_CFG, - ISC_HIS_CFG_MODE_GR | - (isc->config.sd_format->cfa_baycfg - << ISC_HIS_CFG_BAYSEL_SHIFT) | - ISC_HIS_CFG_RAR); - regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_EN); - regmap_write(regmap, ISC_INTEN, ISC_INT_HISDONE); - ctrls->hist_id = ISC_HIS_CFG_MODE_GR; - isc_update_profile(isc); - regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ); - - ctrls->hist_stat = HIST_ENABLED; - } else { - regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE); - regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_DIS); - - ctrls->hist_stat = HIST_DISABLED; - } -} - -static int isc_configure(struct isc_device *isc) -{ - struct regmap *regmap = isc->regmap; - u32 pfe_cfg0, rlp_mode, dcfg, mask, pipeline; - struct isc_subdev_entity *subdev = isc->current_subdev; - - pfe_cfg0 = isc->config.sd_format->pfe_cfg0_bps; - rlp_mode = isc->config.rlp_cfg_mode; - pipeline = isc->config.bits_pipeline; - - dcfg = isc->config.dcfg_imode | - ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8; - - pfe_cfg0 |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE; - mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW | - ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW | - ISC_PFE_CFG0_MODE_MASK | ISC_PFE_CFG0_CCIR_CRC | - ISC_PFE_CFG0_CCIR656; - - regmap_update_bits(regmap, ISC_PFE_CFG0, mask, pfe_cfg0); - - regmap_update_bits(regmap, ISC_RLP_CFG, ISC_RLP_CFG_MODE_MASK, - rlp_mode); - - regmap_write(regmap, ISC_DCFG, dcfg); - - /* Set the pipeline */ - isc_set_pipeline(isc, pipeline); - - /* - * The current implemented histogram is available for RAW R, B, GB, GR - * channels. We need to check if sensor is outputting RAW BAYER - */ - if (isc->ctrls.awb && - ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) - isc_set_histogram(isc, true); - else - isc_set_histogram(isc, false); - - /* Update profile */ - return isc_update_profile(isc); -} - -static int isc_start_streaming(struct vb2_queue *vq, unsigned int count) -{ - struct isc_device *isc = vb2_get_drv_priv(vq); - struct regmap *regmap = isc->regmap; - struct isc_buffer *buf; - unsigned long flags; - int ret; - - /* Enable stream on the sub device */ - ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1); - if (ret && ret != -ENOIOCTLCMD) { - v4l2_err(&isc->v4l2_dev, "stream on failed in subdev %d\n", - ret); - goto err_start_stream; - } - - pm_runtime_get_sync(isc->dev); - - ret = isc_configure(isc); - if (unlikely(ret)) - goto err_configure; - - /* Enable DMA interrupt */ - regmap_write(regmap, ISC_INTEN, ISC_INT_DDONE); - - spin_lock_irqsave(&isc->dma_queue_lock, flags); - - isc->sequence = 0; - isc->stop = false; - reinit_completion(&isc->comp); - - isc->cur_frm = list_first_entry(&isc->dma_queue, - struct isc_buffer, list); - list_del(&isc->cur_frm->list); - - isc_start_dma(isc); - - spin_unlock_irqrestore(&isc->dma_queue_lock, flags); - - /* if we streaming from RAW, we can do one-shot white balance adj */ - if (ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) - v4l2_ctrl_activate(isc->do_wb_ctrl, true); - - return 0; - -err_configure: - pm_runtime_put_sync(isc->dev); - - v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0); - -err_start_stream: - spin_lock_irqsave(&isc->dma_queue_lock, flags); - list_for_each_entry(buf, &isc->dma_queue, list) - vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); - INIT_LIST_HEAD(&isc->dma_queue); - spin_unlock_irqrestore(&isc->dma_queue_lock, flags); - - return ret; -} - -static void isc_stop_streaming(struct vb2_queue *vq) -{ - struct isc_device *isc = vb2_get_drv_priv(vq); - unsigned long flags; - struct isc_buffer *buf; - int ret; - - v4l2_ctrl_activate(isc->do_wb_ctrl, false); - - isc->stop = true; - - /* Wait until the end of the current frame */ - if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ)) - v4l2_err(&isc->v4l2_dev, - "Timeout waiting for end of the capture\n"); - - /* Disable DMA interrupt */ - regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE); - - pm_runtime_put_sync(isc->dev); - - /* Disable stream on the sub device */ - ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0); - if (ret && ret != -ENOIOCTLCMD) - v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n"); - - /* Release all active buffers */ - spin_lock_irqsave(&isc->dma_queue_lock, flags); - if (unlikely(isc->cur_frm)) { - vb2_buffer_done(&isc->cur_frm->vb.vb2_buf, - VB2_BUF_STATE_ERROR); - isc->cur_frm = NULL; - } - list_for_each_entry(buf, &isc->dma_queue, list) - vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); - INIT_LIST_HEAD(&isc->dma_queue); - spin_unlock_irqrestore(&isc->dma_queue_lock, flags); -} - -static void isc_buffer_queue(struct vb2_buffer *vb) -{ - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); - struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb); - struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue); - unsigned long flags; - - spin_lock_irqsave(&isc->dma_queue_lock, flags); - if (!isc->cur_frm && list_empty(&isc->dma_queue) && - vb2_is_streaming(vb->vb2_queue)) { - isc->cur_frm = buf; - isc_start_dma(isc); - } else - list_add_tail(&buf->list, &isc->dma_queue); - spin_unlock_irqrestore(&isc->dma_queue_lock, flags); -} - -static struct isc_format *find_format_by_fourcc(struct isc_device *isc, - unsigned int fourcc) -{ - unsigned int num_formats = isc->num_user_formats; - struct isc_format *fmt; - unsigned int i; - - for (i = 0; i < num_formats; i++) { - fmt = isc->user_formats[i]; - if (fmt->fourcc == fourcc) - return fmt; - } - - return NULL; -} - -static const struct vb2_ops isc_vb2_ops = { - .queue_setup = isc_queue_setup, - .wait_prepare = vb2_ops_wait_prepare, - .wait_finish = vb2_ops_wait_finish, - .buf_prepare = isc_buffer_prepare, - .start_streaming = isc_start_streaming, - .stop_streaming = isc_stop_streaming, - .buf_queue = isc_buffer_queue, -}; - -static int isc_querycap(struct file *file, void *priv, - struct v4l2_capability *cap) -{ - struct isc_device *isc = video_drvdata(file); - - strscpy(cap->driver, ATMEL_ISC_NAME, sizeof(cap->driver)); - strscpy(cap->card, "Atmel Image Sensor Controller", sizeof(cap->card)); - snprintf(cap->bus_info, sizeof(cap->bus_info), - "platform:%s", isc->v4l2_dev.name); - - return 0; -} - -static int isc_enum_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_fmtdesc *f) -{ - u32 index = f->index; - u32 i, supported_index; - - if (index < ARRAY_SIZE(controller_formats)) { - f->pixelformat = controller_formats[index].fourcc; - return 0; - } - - index -= ARRAY_SIZE(controller_formats); - - i = 0; - supported_index = 0; - - for (i = 0; i < ARRAY_SIZE(formats_list); i++) { - if (!ISC_IS_FORMAT_RAW(formats_list[i].mbus_code) || - !formats_list[i].sd_support) - continue; - if (supported_index == index) { - f->pixelformat = formats_list[i].fourcc; - return 0; - } - supported_index++; - } - - return -EINVAL; -} - -static int isc_g_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_format *fmt) -{ - struct isc_device *isc = video_drvdata(file); - - *fmt = isc->fmt; - - return 0; -} - -/* - * Checks the current configured format, if ISC can output it, - * considering which type of format the ISC receives from the sensor - */ -static int isc_try_validate_formats(struct isc_device *isc) -{ - int ret; - bool bayer = false, yuv = false, rgb = false, grey = false; - - /* all formats supported by the RLP module are OK */ - switch (isc->try_config.fourcc) { - case V4L2_PIX_FMT_SBGGR8: - case V4L2_PIX_FMT_SGBRG8: - case V4L2_PIX_FMT_SGRBG8: - case V4L2_PIX_FMT_SRGGB8: - case V4L2_PIX_FMT_SBGGR10: - case V4L2_PIX_FMT_SGBRG10: - case V4L2_PIX_FMT_SGRBG10: - case V4L2_PIX_FMT_SRGGB10: - case V4L2_PIX_FMT_SBGGR12: - case V4L2_PIX_FMT_SGBRG12: - case V4L2_PIX_FMT_SGRBG12: - case V4L2_PIX_FMT_SRGGB12: - ret = 0; - bayer = true; - break; - - case V4L2_PIX_FMT_YUV420: - case V4L2_PIX_FMT_YUV422P: - case V4L2_PIX_FMT_YUYV: - ret = 0; - yuv = true; - break; - - case V4L2_PIX_FMT_RGB565: - case V4L2_PIX_FMT_ABGR32: - case V4L2_PIX_FMT_XBGR32: - case V4L2_PIX_FMT_ARGB444: - case V4L2_PIX_FMT_ARGB555: - ret = 0; - rgb = true; - break; - case V4L2_PIX_FMT_GREY: - ret = 0; - grey = true; - break; - default: - /* any other different formats are not supported */ - ret = -EINVAL; - } - - /* we cannot output RAW/Grey if we do not receive RAW */ - if ((bayer || grey) && - !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) - return -EINVAL; - - v4l2_dbg(1, debug, &isc->v4l2_dev, - "Format validation, requested rgb=%u, yuv=%u, grey=%u, bayer=%u\n", - rgb, yuv, grey, bayer); - - return ret; -} - -/* - * Configures the RLP and DMA modules, depending on the output format - * configured for the ISC. - * If direct_dump == true, just dump raw data 8 bits. - */ -static int isc_try_configure_rlp_dma(struct isc_device *isc, bool direct_dump) -{ - if (direct_dump) { - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 16; - return 0; - } - - switch (isc->try_config.fourcc) { - case V4L2_PIX_FMT_SBGGR8: - case V4L2_PIX_FMT_SGBRG8: - case V4L2_PIX_FMT_SGRBG8: - case V4L2_PIX_FMT_SRGGB8: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 8; - break; - case V4L2_PIX_FMT_SBGGR10: - case V4L2_PIX_FMT_SGBRG10: - case V4L2_PIX_FMT_SGRBG10: - case V4L2_PIX_FMT_SRGGB10: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 16; - break; - case V4L2_PIX_FMT_SBGGR12: - case V4L2_PIX_FMT_SGBRG12: - case V4L2_PIX_FMT_SGRBG12: - case V4L2_PIX_FMT_SRGGB12: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 16; - break; - case V4L2_PIX_FMT_RGB565: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_RGB565; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 16; - break; - case V4L2_PIX_FMT_ARGB444: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB444; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 16; - break; - case V4L2_PIX_FMT_ARGB555: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB555; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 16; - break; - case V4L2_PIX_FMT_ABGR32: - case V4L2_PIX_FMT_XBGR32: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB32; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 32; - break; - case V4L2_PIX_FMT_YUV420: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC420P; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR; - isc->try_config.bpp = 12; - break; - case V4L2_PIX_FMT_YUV422P: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC422P; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR; - isc->try_config.bpp = 16; - break; - case V4L2_PIX_FMT_YUYV: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 16; - break; - case V4L2_PIX_FMT_GREY: - isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY8; - isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; - isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - isc->try_config.bpp = 8; - break; - default: - return -EINVAL; - } - return 0; -} - -/* - * Configuring pipeline modules, depending on which format the ISC outputs - * and considering which format it has as input from the sensor. - */ -static int isc_try_configure_pipeline(struct isc_device *isc) -{ - switch (isc->try_config.fourcc) { - case V4L2_PIX_FMT_RGB565: - case V4L2_PIX_FMT_ARGB555: - case V4L2_PIX_FMT_ARGB444: - case V4L2_PIX_FMT_ABGR32: - case V4L2_PIX_FMT_XBGR32: - /* if sensor format is RAW, we convert inside ISC */ - if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { - isc->try_config.bits_pipeline = CFA_ENABLE | - WB_ENABLE | GAM_ENABLES; - } else { - isc->try_config.bits_pipeline = 0x0; - } - break; - case V4L2_PIX_FMT_YUV420: - /* if sensor format is RAW, we convert inside ISC */ - if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { - isc->try_config.bits_pipeline = CFA_ENABLE | - CSC_ENABLE | WB_ENABLE | GAM_ENABLES | - SUB420_ENABLE | SUB422_ENABLE | CBC_ENABLE; - } else { - isc->try_config.bits_pipeline = 0x0; - } - break; - case V4L2_PIX_FMT_YUV422P: - /* if sensor format is RAW, we convert inside ISC */ - if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { - isc->try_config.bits_pipeline = CFA_ENABLE | - CSC_ENABLE | WB_ENABLE | GAM_ENABLES | - SUB422_ENABLE | CBC_ENABLE; - } else { - isc->try_config.bits_pipeline = 0x0; - } - break; - case V4L2_PIX_FMT_YUYV: - /* if sensor format is RAW, we convert inside ISC */ - if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { - isc->try_config.bits_pipeline = CFA_ENABLE | - CSC_ENABLE | WB_ENABLE | GAM_ENABLES | - SUB422_ENABLE | CBC_ENABLE; - } else { - isc->try_config.bits_pipeline = 0x0; - } - break; - case V4L2_PIX_FMT_GREY: - if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { - /* if sensor format is RAW, we convert inside ISC */ - isc->try_config.bits_pipeline = CFA_ENABLE | - CSC_ENABLE | WB_ENABLE | GAM_ENABLES | - CBC_ENABLE; - } else { - isc->try_config.bits_pipeline = 0x0; - } - break; - default: - isc->try_config.bits_pipeline = 0x0; - } - return 0; -} - -static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f, - u32 *code) -{ - int i; - struct isc_format *sd_fmt = NULL, *direct_fmt = NULL; - struct v4l2_pix_format *pixfmt = &f->fmt.pix; - struct v4l2_subdev_pad_config pad_cfg; - struct v4l2_subdev_format format = { - .which = V4L2_SUBDEV_FORMAT_TRY, - }; - u32 mbus_code; - int ret; - bool rlp_dma_direct_dump = false; - - if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) - return -EINVAL; - - /* Step 1: find a RAW format that is supported */ - for (i = 0; i < isc->num_user_formats; i++) { - if (ISC_IS_FORMAT_RAW(isc->user_formats[i]->mbus_code)) { - sd_fmt = isc->user_formats[i]; - break; - } - } - /* Step 2: We can continue with this RAW format, or we can look - * for better: maybe sensor supports directly what we need. - */ - direct_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat); - - /* Step 3: We have both. We decide given the module parameter which - * one to use. - */ - if (direct_fmt && sd_fmt && sensor_preferred) - sd_fmt = direct_fmt; - - /* Step 4: we do not have RAW but we have a direct format. Use it. */ - if (direct_fmt && !sd_fmt) - sd_fmt = direct_fmt; - - /* Step 5: if we are using a direct format, we need to package - * everything as 8 bit data and just dump it - */ - if (sd_fmt == direct_fmt) - rlp_dma_direct_dump = true; - - /* Step 6: We have no format. This can happen if the userspace - * requests some weird/invalid format. - * In this case, default to whatever we have - */ - if (!sd_fmt && !direct_fmt) { - sd_fmt = isc->user_formats[isc->num_user_formats - 1]; - v4l2_dbg(1, debug, &isc->v4l2_dev, - "Sensor not supporting %.4s, using %.4s\n", - (char *)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc); - } - - if (!sd_fmt) { - ret = -EINVAL; - goto isc_try_fmt_err; - } - - /* Step 7: Print out what we decided for debugging */ - v4l2_dbg(1, debug, &isc->v4l2_dev, - "Preferring to have sensor using format %.4s\n", - (char *)&sd_fmt->fourcc); - - /* Step 8: at this moment we decided which format the subdev will use */ - isc->try_config.sd_format = sd_fmt; - - /* Limit to Atmel ISC hardware capabilities */ - if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH) - pixfmt->width = ISC_MAX_SUPPORT_WIDTH; - if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT) - pixfmt->height = ISC_MAX_SUPPORT_HEIGHT; - - /* - * The mbus format is the one the subdev outputs. - * The pixels will be transferred in this format Sensor -> ISC - */ - mbus_code = sd_fmt->mbus_code; - - /* - * Validate formats. If the required format is not OK, default to raw. - */ - - isc->try_config.fourcc = pixfmt->pixelformat; - - if (isc_try_validate_formats(isc)) { - pixfmt->pixelformat = isc->try_config.fourcc = sd_fmt->fourcc; - /* Re-try to validate the new format */ - ret = isc_try_validate_formats(isc); - if (ret) - goto isc_try_fmt_err; - } - - ret = isc_try_configure_rlp_dma(isc, rlp_dma_direct_dump); - if (ret) - goto isc_try_fmt_err; - - ret = isc_try_configure_pipeline(isc); - if (ret) - goto isc_try_fmt_err; - - v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code); - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt, - &pad_cfg, &format); - if (ret < 0) - goto isc_try_fmt_subdev_err; - - v4l2_fill_pix_format(pixfmt, &format.format); - - pixfmt->field = V4L2_FIELD_NONE; - pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3; - pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; - - if (code) - *code = mbus_code; - - return 0; - -isc_try_fmt_err: - v4l2_err(&isc->v4l2_dev, "Could not find any possible format for a working pipeline\n"); -isc_try_fmt_subdev_err: - memset(&isc->try_config, 0, sizeof(isc->try_config)); - - return ret; -} - -static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f) -{ - struct v4l2_subdev_format format = { - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - u32 mbus_code = 0; - int ret; - - ret = isc_try_fmt(isc, f, &mbus_code); - if (ret) - return ret; - - v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code); - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, - set_fmt, NULL, &format); - if (ret < 0) - return ret; - - isc->fmt = *f; - - if (isc->try_config.sd_format && isc->config.sd_format && - isc->try_config.sd_format != isc->config.sd_format) { - isc->ctrls.hist_stat = HIST_INIT; - isc_reset_awb_ctrls(isc); - } - /* make the try configuration active */ - isc->config = isc->try_config; - - v4l2_dbg(1, debug, &isc->v4l2_dev, "New ISC configuration in place\n"); - - return 0; -} - -static int isc_s_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_format *f) -{ - struct isc_device *isc = video_drvdata(file); - - if (vb2_is_streaming(&isc->vb2_vidq)) - return -EBUSY; - - return isc_set_fmt(isc, f); -} - -static int isc_try_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_format *f) -{ - struct isc_device *isc = video_drvdata(file); - - return isc_try_fmt(isc, f, NULL); -} - -static int isc_enum_input(struct file *file, void *priv, - struct v4l2_input *inp) -{ - if (inp->index != 0) - return -EINVAL; - - inp->type = V4L2_INPUT_TYPE_CAMERA; - inp->std = 0; - strscpy(inp->name, "Camera", sizeof(inp->name)); - - return 0; -} - -static int isc_g_input(struct file *file, void *priv, unsigned int *i) -{ - *i = 0; - - return 0; -} - -static int isc_s_input(struct file *file, void *priv, unsigned int i) -{ - if (i > 0) - return -EINVAL; - - return 0; -} - -static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) -{ - struct isc_device *isc = video_drvdata(file); - - return v4l2_g_parm_cap(video_devdata(file), isc->current_subdev->sd, a); -} - -static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) -{ - struct isc_device *isc = video_drvdata(file); - - return v4l2_s_parm_cap(video_devdata(file), isc->current_subdev->sd, a); -} - -static int isc_enum_framesizes(struct file *file, void *fh, - struct v4l2_frmsizeenum *fsize) -{ - struct isc_device *isc = video_drvdata(file); - struct v4l2_subdev_frame_size_enum fse = { - .index = fsize->index, - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - int ret = -EINVAL; - int i; - - for (i = 0; i < isc->num_user_formats; i++) - if (isc->user_formats[i]->fourcc == fsize->pixel_format) - ret = 0; - - for (i = 0; i < ARRAY_SIZE(controller_formats); i++) - if (controller_formats[i].fourcc == fsize->pixel_format) - ret = 0; - - if (ret) - return ret; - - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size, - NULL, &fse); - if (ret) - return ret; - - fse.code = isc->config.sd_format->mbus_code; - - fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; - fsize->discrete.width = fse.max_width; - fsize->discrete.height = fse.max_height; - - return 0; -} - -static int isc_enum_frameintervals(struct file *file, void *fh, - struct v4l2_frmivalenum *fival) -{ - struct isc_device *isc = video_drvdata(file); - struct v4l2_subdev_frame_interval_enum fie = { - .index = fival->index, - .width = fival->width, - .height = fival->height, - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - int ret = -EINVAL; - int i; - - for (i = 0; i < isc->num_user_formats; i++) - if (isc->user_formats[i]->fourcc == fival->pixel_format) - ret = 0; - - for (i = 0; i < ARRAY_SIZE(controller_formats); i++) - if (controller_formats[i].fourcc == fival->pixel_format) - ret = 0; - - if (ret) - return ret; - - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, - enum_frame_interval, NULL, &fie); - if (ret) - return ret; - - fie.code = isc->config.sd_format->mbus_code; - fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; - fival->discrete = fie.interval; - - return 0; -} - -static const struct v4l2_ioctl_ops isc_ioctl_ops = { - .vidioc_querycap = isc_querycap, - .vidioc_enum_fmt_vid_cap = isc_enum_fmt_vid_cap, - .vidioc_g_fmt_vid_cap = isc_g_fmt_vid_cap, - .vidioc_s_fmt_vid_cap = isc_s_fmt_vid_cap, - .vidioc_try_fmt_vid_cap = isc_try_fmt_vid_cap, - - .vidioc_enum_input = isc_enum_input, - .vidioc_g_input = isc_g_input, - .vidioc_s_input = isc_s_input, - - .vidioc_reqbufs = vb2_ioctl_reqbufs, - .vidioc_querybuf = vb2_ioctl_querybuf, - .vidioc_qbuf = vb2_ioctl_qbuf, - .vidioc_expbuf = vb2_ioctl_expbuf, - .vidioc_dqbuf = vb2_ioctl_dqbuf, - .vidioc_create_bufs = vb2_ioctl_create_bufs, - .vidioc_prepare_buf = vb2_ioctl_prepare_buf, - .vidioc_streamon = vb2_ioctl_streamon, - .vidioc_streamoff = vb2_ioctl_streamoff, - - .vidioc_g_parm = isc_g_parm, - .vidioc_s_parm = isc_s_parm, - .vidioc_enum_framesizes = isc_enum_framesizes, - .vidioc_enum_frameintervals = isc_enum_frameintervals, - - .vidioc_log_status = v4l2_ctrl_log_status, - .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, - .vidioc_unsubscribe_event = v4l2_event_unsubscribe, -}; - -static int isc_open(struct file *file) -{ - struct isc_device *isc = video_drvdata(file); - struct v4l2_subdev *sd = isc->current_subdev->sd; - int ret; - - if (mutex_lock_interruptible(&isc->lock)) - return -ERESTARTSYS; - - ret = v4l2_fh_open(file); - if (ret < 0) - goto unlock; - - if (!v4l2_fh_is_singular_file(file)) - goto unlock; - - ret = v4l2_subdev_call(sd, core, s_power, 1); - if (ret < 0 && ret != -ENOIOCTLCMD) { - v4l2_fh_release(file); - goto unlock; - } - - ret = isc_set_fmt(isc, &isc->fmt); - if (ret) { - v4l2_subdev_call(sd, core, s_power, 0); - v4l2_fh_release(file); - } - -unlock: - mutex_unlock(&isc->lock); - return ret; -} - -static int isc_release(struct file *file) -{ - struct isc_device *isc = video_drvdata(file); - struct v4l2_subdev *sd = isc->current_subdev->sd; - bool fh_singular; - int ret; - - mutex_lock(&isc->lock); - - fh_singular = v4l2_fh_is_singular_file(file); - - ret = _vb2_fop_release(file, NULL); - - if (fh_singular) - v4l2_subdev_call(sd, core, s_power, 0); - - mutex_unlock(&isc->lock); - - return ret; -} - -static const struct v4l2_file_operations isc_fops = { - .owner = THIS_MODULE, - .open = isc_open, - .release = isc_release, - .unlocked_ioctl = video_ioctl2, - .read = vb2_fop_read, - .mmap = vb2_fop_mmap, - .poll = vb2_fop_poll, -}; - -static irqreturn_t isc_interrupt(int irq, void *dev_id) -{ - struct isc_device *isc = (struct isc_device *)dev_id; - struct regmap *regmap = isc->regmap; - u32 isc_intsr, isc_intmask, pending; - irqreturn_t ret = IRQ_NONE; - - regmap_read(regmap, ISC_INTSR, &isc_intsr); - regmap_read(regmap, ISC_INTMASK, &isc_intmask); - - pending = isc_intsr & isc_intmask; - - if (likely(pending & ISC_INT_DDONE)) { - spin_lock(&isc->dma_queue_lock); - if (isc->cur_frm) { - struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb; - struct vb2_buffer *vb = &vbuf->vb2_buf; - - vb->timestamp = ktime_get_ns(); - vbuf->sequence = isc->sequence++; - vb2_buffer_done(vb, VB2_BUF_STATE_DONE); - isc->cur_frm = NULL; - } - - if (!list_empty(&isc->dma_queue) && !isc->stop) { - isc->cur_frm = list_first_entry(&isc->dma_queue, - struct isc_buffer, list); - list_del(&isc->cur_frm->list); - - isc_start_dma(isc); - } - - if (isc->stop) - complete(&isc->comp); - - ret = IRQ_HANDLED; - spin_unlock(&isc->dma_queue_lock); - } - - if (pending & ISC_INT_HISDONE) { - schedule_work(&isc->awb_work); - ret = IRQ_HANDLED; - } - - return ret; -} - -static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max) -{ - struct regmap *regmap = isc->regmap; - struct isc_ctrls *ctrls = &isc->ctrls; - u32 *hist_count = &ctrls->hist_count[ctrls->hist_id]; - u32 *hist_entry = &ctrls->hist_entry[0]; - u32 i; - - *min = 0; - *max = HIST_ENTRIES; - - regmap_bulk_read(regmap, ISC_HIS_ENTRY, hist_entry, HIST_ENTRIES); - - *hist_count = 0; - /* - * we deliberately ignore the end of the histogram, - * the most white pixels - */ - for (i = 1; i < HIST_ENTRIES; i++) { - if (*hist_entry && !*min) - *min = i; - if (*hist_entry) - *max = i; - *hist_count += i * (*hist_entry++); - } - - if (!*min) - *min = 1; -} - -static void isc_wb_update(struct isc_ctrls *ctrls) -{ - u32 *hist_count = &ctrls->hist_count[0]; - u32 c, offset[4]; - u64 avg = 0; - /* We compute two gains, stretch gain and grey world gain */ - u32 s_gain[4], gw_gain[4]; - - /* - * According to Grey World, we need to set gains for R/B to normalize - * them towards the green channel. - * Thus we want to keep Green as fixed and adjust only Red/Blue - * Compute the average of the both green channels first - */ - avg = (u64)hist_count[ISC_HIS_CFG_MODE_GR] + - (u64)hist_count[ISC_HIS_CFG_MODE_GB]; - avg >>= 1; - - /* Green histogram is null, nothing to do */ - if (!avg) - return; - - for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) { - /* - * the color offset is the minimum value of the histogram. - * we stretch this color to the full range by substracting - * this value from the color component. - */ - offset[c] = ctrls->hist_minmax[c][HIST_MIN_INDEX]; - /* - * The offset is always at least 1. If the offset is 1, we do - * not need to adjust it, so our result must be zero. - * the offset is computed in a histogram on 9 bits (0..512) - * but the offset in register is based on - * 12 bits pipeline (0..4096). - * we need to shift with the 3 bits that the histogram is - * ignoring - */ - ctrls->offset[c] = (offset[c] - 1) << 3; - - /* the offset is then taken and converted to 2's complements */ - if (!ctrls->offset[c]) - ctrls->offset[c] = ISC_WB_O_ZERO_VAL; - - /* - * the stretch gain is the total number of histogram bins - * divided by the actual range of color component (Max - Min) - * If we compute gain like this, the actual color component - * will be stretched to the full histogram. - * We need to shift 9 bits for precision, we have 9 bits for - * decimals - */ - s_gain[c] = (HIST_ENTRIES << 9) / - (ctrls->hist_minmax[c][HIST_MAX_INDEX] - - ctrls->hist_minmax[c][HIST_MIN_INDEX] + 1); - - /* - * Now we have to compute the gain w.r.t. the average. - * Add/lose gain to the component towards the average. - * If it happens that the component is zero, use the - * fixed point value : 1.0 gain. - */ - if (hist_count[c]) - gw_gain[c] = div_u64(avg << 9, hist_count[c]); - else - gw_gain[c] = 1 << 9; - - /* multiply both gains and adjust for decimals */ - ctrls->gain[c] = s_gain[c] * gw_gain[c]; - ctrls->gain[c] >>= 9; - } -} - -static void isc_awb_work(struct work_struct *w) -{ - struct isc_device *isc = - container_of(w, struct isc_device, awb_work); - struct regmap *regmap = isc->regmap; - struct isc_ctrls *ctrls = &isc->ctrls; - u32 hist_id = ctrls->hist_id; - u32 baysel; - unsigned long flags; - u32 min, max; - - /* streaming is not active anymore */ - if (isc->stop) - return; - - if (ctrls->hist_stat != HIST_ENABLED) - return; - - isc_hist_count(isc, &min, &max); - ctrls->hist_minmax[hist_id][HIST_MIN_INDEX] = min; - ctrls->hist_minmax[hist_id][HIST_MAX_INDEX] = max; - - if (hist_id != ISC_HIS_CFG_MODE_B) { - hist_id++; - } else { - isc_wb_update(ctrls); - hist_id = ISC_HIS_CFG_MODE_GR; - } - - ctrls->hist_id = hist_id; - baysel = isc->config.sd_format->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT; - - /* if no more auto white balance, reset controls. */ - if (ctrls->awb == ISC_WB_NONE) - isc_reset_awb_ctrls(isc); - - pm_runtime_get_sync(isc->dev); - - /* - * only update if we have all the required histograms and controls - * if awb has been disabled, we need to reset registers as well. - */ - if (hist_id == ISC_HIS_CFG_MODE_GR || ctrls->awb == ISC_WB_NONE) { - /* - * It may happen that DMA Done IRQ will trigger while we are - * updating white balance registers here. - * In that case, only parts of the controls have been updated. - * We can avoid that by locking the section. - */ - spin_lock_irqsave(&isc->awb_lock, flags); - isc_update_awb_ctrls(isc); - spin_unlock_irqrestore(&isc->awb_lock, flags); - - /* - * if we are doing just the one time white balance adjustment, - * we are basically done. - */ - if (ctrls->awb == ISC_WB_ONETIME) { - v4l2_info(&isc->v4l2_dev, - "Completed one time white-balance adjustment.\n"); - ctrls->awb = ISC_WB_NONE; - } - } - regmap_write(regmap, ISC_HIS_CFG, hist_id | baysel | ISC_HIS_CFG_RAR); - isc_update_profile(isc); - /* if awb has been disabled, we don't need to start another histogram */ - if (ctrls->awb) - regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ); - - pm_runtime_put_sync(isc->dev); -} - -static int isc_s_ctrl(struct v4l2_ctrl *ctrl) -{ - struct isc_device *isc = container_of(ctrl->handler, - struct isc_device, ctrls.handler); - struct isc_ctrls *ctrls = &isc->ctrls; - - if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) - return 0; - - switch (ctrl->id) { - case V4L2_CID_BRIGHTNESS: - ctrls->brightness = ctrl->val & ISC_CBC_BRIGHT_MASK; - break; - case V4L2_CID_CONTRAST: - ctrls->contrast = ctrl->val & ISC_CBC_CONTRAST_MASK; - break; - case V4L2_CID_GAMMA: - ctrls->gamma_index = ctrl->val; - break; - case V4L2_CID_AUTO_WHITE_BALANCE: - if (ctrl->val == 1) - ctrls->awb = ISC_WB_AUTO; - else - ctrls->awb = ISC_WB_NONE; - - /* we did not configure ISC yet */ - if (!isc->config.sd_format) - break; - - if (ctrls->hist_stat != HIST_ENABLED) - isc_reset_awb_ctrls(isc); - - if (isc->ctrls.awb == ISC_WB_AUTO && - vb2_is_streaming(&isc->vb2_vidq) && - ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) - isc_set_histogram(isc, true); - - break; - case V4L2_CID_DO_WHITE_BALANCE: - /* if AWB is enabled, do nothing */ - if (ctrls->awb == ISC_WB_AUTO) - return 0; - - ctrls->awb = ISC_WB_ONETIME; - isc_set_histogram(isc, true); - v4l2_dbg(1, debug, &isc->v4l2_dev, - "One time white-balance started.\n"); - break; - default: - return -EINVAL; - } - - return 0; -} - -static const struct v4l2_ctrl_ops isc_ctrl_ops = { - .s_ctrl = isc_s_ctrl, -}; - -static int isc_ctrl_init(struct isc_device *isc) -{ - const struct v4l2_ctrl_ops *ops = &isc_ctrl_ops; - struct isc_ctrls *ctrls = &isc->ctrls; - struct v4l2_ctrl_handler *hdl = &ctrls->handler; - int ret; - - ctrls->hist_stat = HIST_INIT; - isc_reset_awb_ctrls(isc); - - ret = v4l2_ctrl_handler_init(hdl, 5); - if (ret < 0) - return ret; - - ctrls->brightness = 0; - ctrls->contrast = 256; - - v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0); - v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256); - v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, GAMMA_MAX, 1, 2); - v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); - - /* do_white_balance is a button, so min,max,step,default are ignored */ - isc->do_wb_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_DO_WHITE_BALANCE, - 0, 0, 0, 0); - - v4l2_ctrl_activate(isc->do_wb_ctrl, false); - - v4l2_ctrl_handler_setup(hdl); - - return 0; -} - -static int isc_async_bound(struct v4l2_async_notifier *notifier, - struct v4l2_subdev *subdev, - struct v4l2_async_subdev *asd) -{ - struct isc_device *isc = container_of(notifier->v4l2_dev, - struct isc_device, v4l2_dev); - struct isc_subdev_entity *subdev_entity = - container_of(notifier, struct isc_subdev_entity, notifier); - - if (video_is_registered(&isc->video_dev)) { - v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n"); - return -EBUSY; - } - - subdev_entity->sd = subdev; - - return 0; -} - -static void isc_async_unbind(struct v4l2_async_notifier *notifier, - struct v4l2_subdev *subdev, - struct v4l2_async_subdev *asd) -{ - struct isc_device *isc = container_of(notifier->v4l2_dev, - struct isc_device, v4l2_dev); - cancel_work_sync(&isc->awb_work); - video_unregister_device(&isc->video_dev); - v4l2_ctrl_handler_free(&isc->ctrls.handler); -} - -static struct isc_format *find_format_by_code(unsigned int code, int *index) -{ - struct isc_format *fmt = &formats_list[0]; - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(formats_list); i++) { - if (fmt->mbus_code == code) { - *index = i; - return fmt; - } - - fmt++; - } - - return NULL; -} - -static int isc_formats_init(struct isc_device *isc) -{ - struct isc_format *fmt; - struct v4l2_subdev *subdev = isc->current_subdev->sd; - unsigned int num_fmts, i, j; - u32 list_size = ARRAY_SIZE(formats_list); - struct v4l2_subdev_mbus_code_enum mbus_code = { - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - - num_fmts = 0; - while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, - NULL, &mbus_code)) { - mbus_code.index++; - - fmt = find_format_by_code(mbus_code.code, &i); - if (!fmt) { - v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n", - mbus_code.code); - continue; - } - - fmt->sd_support = true; - num_fmts++; - } - - if (!num_fmts) - return -ENXIO; - - isc->num_user_formats = num_fmts; - isc->user_formats = devm_kcalloc(isc->dev, - num_fmts, sizeof(*isc->user_formats), - GFP_KERNEL); - if (!isc->user_formats) - return -ENOMEM; - - fmt = &formats_list[0]; - for (i = 0, j = 0; i < list_size; i++) { - if (fmt->sd_support) - isc->user_formats[j++] = fmt; - fmt++; - } - - return 0; -} - -static int isc_set_default_fmt(struct isc_device *isc) -{ - struct v4l2_format f = { - .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, - .fmt.pix = { - .width = VGA_WIDTH, - .height = VGA_HEIGHT, - .field = V4L2_FIELD_NONE, - .pixelformat = isc->user_formats[0]->fourcc, - }, - }; - int ret; - - ret = isc_try_fmt(isc, &f, NULL); - if (ret) - return ret; - - isc->fmt = f; - return 0; -} - -static int isc_async_complete(struct v4l2_async_notifier *notifier) -{ - struct isc_device *isc = container_of(notifier->v4l2_dev, - struct isc_device, v4l2_dev); - struct video_device *vdev = &isc->video_dev; - struct vb2_queue *q = &isc->vb2_vidq; - int ret; - - INIT_WORK(&isc->awb_work, isc_awb_work); - - ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev); - if (ret < 0) { - v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n"); - return ret; - } - - isc->current_subdev = container_of(notifier, - struct isc_subdev_entity, notifier); - mutex_init(&isc->lock); - init_completion(&isc->comp); - - /* Initialize videobuf2 queue */ - q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; - q->drv_priv = isc; - q->buf_struct_size = sizeof(struct isc_buffer); - q->ops = &isc_vb2_ops; - q->mem_ops = &vb2_dma_contig_memops; - q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; - q->lock = &isc->lock; - q->min_buffers_needed = 1; - q->dev = isc->dev; - - ret = vb2_queue_init(q); - if (ret < 0) { - v4l2_err(&isc->v4l2_dev, - "vb2_queue_init() failed: %d\n", ret); - return ret; - } - - /* Init video dma queues */ - INIT_LIST_HEAD(&isc->dma_queue); - spin_lock_init(&isc->dma_queue_lock); - spin_lock_init(&isc->awb_lock); - - ret = isc_formats_init(isc); - if (ret < 0) { - v4l2_err(&isc->v4l2_dev, - "Init format failed: %d\n", ret); - return ret; - } - - ret = isc_set_default_fmt(isc); - if (ret) { - v4l2_err(&isc->v4l2_dev, "Could not set default format\n"); - return ret; - } - - ret = isc_ctrl_init(isc); - if (ret) { - v4l2_err(&isc->v4l2_dev, "Init isc ctrols failed: %d\n", ret); - return ret; - } - - /* Register video device */ - strscpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name)); - vdev->release = video_device_release_empty; - vdev->fops = &isc_fops; - vdev->ioctl_ops = &isc_ioctl_ops; - vdev->v4l2_dev = &isc->v4l2_dev; - vdev->vfl_dir = VFL_DIR_RX; - vdev->queue = q; - vdev->lock = &isc->lock; - vdev->ctrl_handler = &isc->ctrls.handler; - vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE; - video_set_drvdata(vdev, isc); - - ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); - if (ret < 0) { - v4l2_err(&isc->v4l2_dev, - "video_register_device failed: %d\n", ret); - return ret; - } - - return 0; -} - -static const struct v4l2_async_notifier_operations isc_async_ops = { - .bound = isc_async_bound, - .unbind = isc_async_unbind, - .complete = isc_async_complete, -}; - -static void isc_subdev_cleanup(struct isc_device *isc) -{ - struct isc_subdev_entity *subdev_entity; - - list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { - v4l2_async_notifier_unregister(&subdev_entity->notifier); - v4l2_async_notifier_cleanup(&subdev_entity->notifier); - } - - INIT_LIST_HEAD(&isc->subdev_entities); -} - -static int isc_pipeline_init(struct isc_device *isc) -{ - struct device *dev = isc->dev; - struct regmap *regmap = isc->regmap; - struct regmap_field *regs; - unsigned int i; - - /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */ - const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = { - REG_FIELD(ISC_WB_CTRL, 0, 0), - REG_FIELD(ISC_CFA_CTRL, 0, 0), - REG_FIELD(ISC_CC_CTRL, 0, 0), - REG_FIELD(ISC_GAM_CTRL, 0, 0), - REG_FIELD(ISC_GAM_CTRL, 1, 1), - REG_FIELD(ISC_GAM_CTRL, 2, 2), - REG_FIELD(ISC_GAM_CTRL, 3, 3), - REG_FIELD(ISC_CSC_CTRL, 0, 0), - REG_FIELD(ISC_CBC_CTRL, 0, 0), - REG_FIELD(ISC_SUB422_CTRL, 0, 0), - REG_FIELD(ISC_SUB420_CTRL, 0, 0), - }; - - for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) { - regs = devm_regmap_field_alloc(dev, regmap, regfields[i]); - if (IS_ERR(regs)) - return PTR_ERR(regs); - - isc->pipeline[i] = regs; - } - - return 0; -} - -static int isc_parse_dt(struct device *dev, struct isc_device *isc) -{ - struct device_node *np = dev->of_node; - struct device_node *epn = NULL, *rem; - struct isc_subdev_entity *subdev_entity; - unsigned int flags; - int ret; - - INIT_LIST_HEAD(&isc->subdev_entities); - - while (1) { - struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 }; - - epn = of_graph_get_next_endpoint(np, epn); - if (!epn) - return 0; - - rem = of_graph_get_remote_port_parent(epn); - if (!rem) { - dev_notice(dev, "Remote device at %pOF not found\n", - epn); - continue; - } - - ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn), - &v4l2_epn); - if (ret) { - of_node_put(rem); - ret = -EINVAL; - dev_err(dev, "Could not parse the endpoint\n"); - break; - } - - subdev_entity = devm_kzalloc(dev, - sizeof(*subdev_entity), GFP_KERNEL); - if (!subdev_entity) { - of_node_put(rem); - ret = -ENOMEM; - break; - } - - /* asd will be freed by the subsystem once it's added to the - * notifier list - */ - subdev_entity->asd = kzalloc(sizeof(*subdev_entity->asd), - GFP_KERNEL); - if (!subdev_entity->asd) { - of_node_put(rem); - ret = -ENOMEM; - break; - } - - flags = v4l2_epn.bus.parallel.flags; - - if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) - subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW; - - if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) - subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW; - - if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) - subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW; - - if (v4l2_epn.bus_type == V4L2_MBUS_BT656) - subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC | - ISC_PFE_CFG0_CCIR656; - - subdev_entity->asd->match_type = V4L2_ASYNC_MATCH_FWNODE; - subdev_entity->asd->match.fwnode = - of_fwnode_handle(rem); - list_add_tail(&subdev_entity->list, &isc->subdev_entities); - } - - of_node_put(epn); - return ret; -} - -/* regmap configuration */ -#define ATMEL_ISC_REG_MAX 0xbfc -static const struct regmap_config isc_regmap_config = { - .reg_bits = 32, - .reg_stride = 4, - .val_bits = 32, - .max_register = ATMEL_ISC_REG_MAX, -}; - -static int atmel_isc_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct isc_device *isc; - struct resource *res; - void __iomem *io_base; - struct isc_subdev_entity *subdev_entity; - int irq; - int ret; - - isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL); - if (!isc) - return -ENOMEM; - - platform_set_drvdata(pdev, isc); - isc->dev = dev; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - io_base = devm_ioremap_resource(dev, res); - if (IS_ERR(io_base)) - return PTR_ERR(io_base); - - isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config); - if (IS_ERR(isc->regmap)) { - ret = PTR_ERR(isc->regmap); - dev_err(dev, "failed to init register map: %d\n", ret); - return ret; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - ret = irq; - dev_err(dev, "failed to get irq: %d\n", ret); - return ret; - } - - ret = devm_request_irq(dev, irq, isc_interrupt, 0, - ATMEL_ISC_NAME, isc); - if (ret < 0) { - dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n", - irq, ret); - return ret; - } - - ret = isc_pipeline_init(isc); - if (ret) - return ret; - - isc->hclock = devm_clk_get(dev, "hclock"); - if (IS_ERR(isc->hclock)) { - ret = PTR_ERR(isc->hclock); - dev_err(dev, "failed to get hclock: %d\n", ret); - return ret; - } - - ret = clk_prepare_enable(isc->hclock); - if (ret) { - dev_err(dev, "failed to enable hclock: %d\n", ret); - return ret; - } - - ret = isc_clk_init(isc); - if (ret) { - dev_err(dev, "failed to init isc clock: %d\n", ret); - goto unprepare_hclk; - } - - isc->ispck = isc->isc_clks[ISC_ISPCK].clk; - - ret = clk_prepare_enable(isc->ispck); - if (ret) { - dev_err(dev, "failed to enable ispck: %d\n", ret); - goto unprepare_hclk; - } - - /* ispck should be greater or equal to hclock */ - ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock)); - if (ret) { - dev_err(dev, "failed to set ispck rate: %d\n", ret); - goto unprepare_clk; - } - - ret = v4l2_device_register(dev, &isc->v4l2_dev); - if (ret) { - dev_err(dev, "unable to register v4l2 device.\n"); - goto unprepare_clk; - } - - ret = isc_parse_dt(dev, isc); - if (ret) { - dev_err(dev, "fail to parse device tree\n"); - goto unregister_v4l2_device; - } - - if (list_empty(&isc->subdev_entities)) { - dev_err(dev, "no subdev found\n"); - ret = -ENODEV; - goto unregister_v4l2_device; - } - - list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { - v4l2_async_notifier_init(&subdev_entity->notifier); - - ret = v4l2_async_notifier_add_subdev(&subdev_entity->notifier, - subdev_entity->asd); - if (ret) { - fwnode_handle_put(subdev_entity->asd->match.fwnode); - kfree(subdev_entity->asd); - goto cleanup_subdev; - } - - subdev_entity->notifier.ops = &isc_async_ops; - - ret = v4l2_async_notifier_register(&isc->v4l2_dev, - &subdev_entity->notifier); - if (ret) { - dev_err(dev, "fail to register async notifier\n"); - goto cleanup_subdev; - } - - if (video_is_registered(&isc->video_dev)) - break; - } - - pm_runtime_set_active(dev); - pm_runtime_enable(dev); - pm_request_idle(dev); - - return 0; - -cleanup_subdev: - isc_subdev_cleanup(isc); - -unregister_v4l2_device: - v4l2_device_unregister(&isc->v4l2_dev); - -unprepare_clk: - clk_disable_unprepare(isc->ispck); -unprepare_hclk: - clk_disable_unprepare(isc->hclock); - - isc_clk_cleanup(isc); - - return ret; -} - -static int atmel_isc_remove(struct platform_device *pdev) -{ - struct isc_device *isc = platform_get_drvdata(pdev); - - pm_runtime_disable(&pdev->dev); - clk_disable_unprepare(isc->ispck); - clk_disable_unprepare(isc->hclock); - - isc_subdev_cleanup(isc); - - v4l2_device_unregister(&isc->v4l2_dev); - - isc_clk_cleanup(isc); - - return 0; -} - -static int __maybe_unused isc_runtime_suspend(struct device *dev) -{ - struct isc_device *isc = dev_get_drvdata(dev); - - clk_disable_unprepare(isc->ispck); - clk_disable_unprepare(isc->hclock); - - return 0; -} - -static int __maybe_unused isc_runtime_resume(struct device *dev) -{ - struct isc_device *isc = dev_get_drvdata(dev); - int ret; - - ret = clk_prepare_enable(isc->hclock); - if (ret) - return ret; - - return clk_prepare_enable(isc->ispck); -} - -static const struct dev_pm_ops atmel_isc_dev_pm_ops = { - SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL) -}; - -static const struct of_device_id atmel_isc_of_match[] = { - { .compatible = "atmel,sama5d2-isc" }, - { } -}; -MODULE_DEVICE_TABLE(of, atmel_isc_of_match); - -static struct platform_driver atmel_isc_driver = { - .probe = atmel_isc_probe, - .remove = atmel_isc_remove, - .driver = { - .name = ATMEL_ISC_NAME, - .pm = &atmel_isc_dev_pm_ops, - .of_match_table = of_match_ptr(atmel_isc_of_match), - }, -}; - -module_platform_driver(atmel_isc_driver); - -MODULE_AUTHOR("Songjun Wu "); -MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC"); -MODULE_LICENSE("GPL v2"); -MODULE_SUPPORTED_DEVICE("video"); diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h new file mode 100644 index 0000000..f633e10 --- /dev/null +++ b/drivers/media/platform/atmel/atmel-isc.h @@ -0,0 +1,208 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Microchip Image Sensor Controller (ISC) driver header file + * + * Copyright (C) 2016-2019 Microchip Technology, Inc. + * + * Author: Songjun Wu + * Author: Eugen Hristev + * + */ +#ifndef _ATMEL_ISC_H_ + +#define ISC_MAX_SUPPORT_WIDTH 2592 +#define ISC_MAX_SUPPORT_HEIGHT 1944 + +#define ISC_CLK_MAX_DIV 255 + +enum isc_clk_id { + ISC_ISPCK = 0, + ISC_MCK = 1, +}; + +struct isc_clk { + struct clk_hw hw; + struct clk *clk; + struct regmap *regmap; + spinlock_t lock; + u8 id; + u8 parent_id; + u32 div; + struct device *dev; +}; + +#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw) + +struct isc_buffer { + struct vb2_v4l2_buffer vb; + struct list_head list; +}; + +struct isc_subdev_entity { + struct v4l2_subdev *sd; + struct v4l2_async_subdev *asd; + struct v4l2_async_notifier notifier; + + u32 pfe_cfg0; + + struct list_head list; +}; + +/* + * struct isc_format - ISC media bus format information + This structure represents the interface between the ISC + and the sensor. It's the input format received by + the ISC. + * @fourcc: Fourcc code for this format + * @mbus_code: V4L2 media bus format code. + * @cfa_baycfg: If this format is RAW BAYER, indicate the type of bayer. + this is either BGBG, RGRG, etc. + * @pfe_cfg0_bps: Number of hardware data lines connected to the ISC + */ + +struct isc_format { + u32 fourcc; + u32 mbus_code; + u32 cfa_baycfg; + + bool sd_support; + u32 pfe_cfg0_bps; +}; + +/* Pipeline bitmap */ +#define WB_ENABLE BIT(0) +#define CFA_ENABLE BIT(1) +#define CC_ENABLE BIT(2) +#define GAM_ENABLE BIT(3) +#define GAM_BENABLE BIT(4) +#define GAM_GENABLE BIT(5) +#define GAM_RENABLE BIT(6) +#define CSC_ENABLE BIT(7) +#define CBC_ENABLE BIT(8) +#define SUB422_ENABLE BIT(9) +#define SUB420_ENABLE BIT(10) + +#define GAM_ENABLES (GAM_RENABLE | GAM_GENABLE | GAM_BENABLE | GAM_ENABLE) + +/* + * struct fmt_config - ISC format configuration and internal pipeline + This structure represents the internal configuration + of the ISC. + It also holds the format that ISC will present to v4l2. + * @sd_format: Pointer to an isc_format struct that holds the sensor + configuration. + * @fourcc: Fourcc code for this format. + * @bpp: Bytes per pixel in the current format. + * @rlp_cfg_mode: Configuration of the RLP (rounding, limiting packaging) + * @dcfg_imode: Configuration of the input of the DMA module + * @dctrl_dview: Configuration of the output of the DMA module + * @bits_pipeline: Configuration of the pipeline, which modules are enabled + */ +struct fmt_config { + struct isc_format *sd_format; + + u32 fourcc; + u8 bpp; + + u32 rlp_cfg_mode; + u32 dcfg_imode; + u32 dctrl_dview; + + u32 bits_pipeline; +}; + +#define HIST_ENTRIES 512 +#define HIST_BAYER (ISC_HIS_CFG_MODE_B + 1) + +enum{ + HIST_INIT = 0, + HIST_ENABLED, + HIST_DISABLED, +}; + +struct isc_ctrls { + struct v4l2_ctrl_handler handler; + + u32 brightness; + u32 contrast; + u8 gamma_index; +#define ISC_WB_NONE 0 +#define ISC_WB_AUTO 1 +#define ISC_WB_ONETIME 2 + u8 awb; + + /* one for each component : GR, R, GB, B */ + u32 gain[HIST_BAYER]; + u32 offset[HIST_BAYER]; + + u32 hist_entry[HIST_ENTRIES]; + u32 hist_count[HIST_BAYER]; + u8 hist_id; + u8 hist_stat; +#define HIST_MIN_INDEX 0 +#define HIST_MAX_INDEX 1 + u32 hist_minmax[HIST_BAYER][2]; +}; + +#define ISC_PIPE_LINE_NODE_NUM 11 + +struct isc_device { + struct regmap *regmap; + struct clk *hclock; + struct clk *ispck; + struct isc_clk isc_clks[2]; + + struct device *dev; + struct v4l2_device v4l2_dev; + struct video_device video_dev; + + struct vb2_queue vb2_vidq; + spinlock_t dma_queue_lock; + struct list_head dma_queue; + struct isc_buffer *cur_frm; + unsigned int sequence; + bool stop; + struct completion comp; + + struct v4l2_format fmt; + struct isc_format **user_formats; + unsigned int num_user_formats; + + struct fmt_config config; + struct fmt_config try_config; + + struct isc_ctrls ctrls; + struct v4l2_ctrl *do_wb_ctrl; + struct work_struct awb_work; + + struct mutex lock; + spinlock_t awb_lock; + + struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM]; + + struct isc_subdev_entity *current_subdev; + struct list_head subdev_entities; +}; + +#define GAMMA_MAX 2 +#define GAMMA_ENTRIES 64 + +#define ATMEL_ISC_NAME "atmel-isc" + +/* module parameters */ +extern unsigned int debug; +extern unsigned int sensor_preferred; + +extern struct isc_format formats_list[]; +extern struct isc_format controller_formats[]; +extern const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES]; +extern const struct regmap_config isc_regmap_config; +extern const struct v4l2_async_notifier_operations isc_async_ops; + +irqreturn_t isc_interrupt(int irq, void *dev_id); +int isc_pipeline_init(struct isc_device *isc); +int isc_clk_init(struct isc_device *isc); +void isc_subdev_cleanup(struct isc_device *isc); +void isc_clk_cleanup(struct isc_device *isc); + +#endif diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c new file mode 100644 index 0000000..93fb839 --- /dev/null +++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c @@ -0,0 +1,344 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Microchip Image Sensor Controller (ISC) driver + * + * Copyright (C) 2016-2019 Microchip Technology, Inc. + * + * Author: Songjun Wu + * Author: Eugen Hristev + * + * + * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA + * + * ISC video pipeline integrates the following submodules: + * PFE: Parallel Front End to sample the camera sensor input stream + * WB: Programmable white balance in the Bayer domain + * CFA: Color filter array interpolation module + * CC: Programmable color correction + * GAM: Gamma correction + * CSC: Programmable color space conversion + * CBC: Contrast and Brightness control + * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling + * RLP: This module performs rounding, range limiting + * and packing of the incoming data + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "atmel-isc-regs.h" +#include "atmel-isc.h" + +#define ISC_MAX_SUPPORT_WIDTH 2592 +#define ISC_MAX_SUPPORT_HEIGHT 1944 + +#define ISC_CLK_MAX_DIV 255 + +static int isc_parse_dt(struct device *dev, struct isc_device *isc) +{ + struct device_node *np = dev->of_node; + struct device_node *epn = NULL, *rem; + struct isc_subdev_entity *subdev_entity; + unsigned int flags; + int ret; + + INIT_LIST_HEAD(&isc->subdev_entities); + + while (1) { + struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 }; + + epn = of_graph_get_next_endpoint(np, epn); + if (!epn) + return 0; + + rem = of_graph_get_remote_port_parent(epn); + if (!rem) { + dev_notice(dev, "Remote device at %pOF not found\n", + epn); + continue; + } + + ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn), + &v4l2_epn); + if (ret) { + of_node_put(rem); + ret = -EINVAL; + dev_err(dev, "Could not parse the endpoint\n"); + break; + } + + subdev_entity = devm_kzalloc(dev, + sizeof(*subdev_entity), GFP_KERNEL); + if (!subdev_entity) { + of_node_put(rem); + ret = -ENOMEM; + break; + } + + /* asd will be freed by the subsystem once it's added to the + * notifier list + */ + subdev_entity->asd = kzalloc(sizeof(*subdev_entity->asd), + GFP_KERNEL); + if (!subdev_entity->asd) { + of_node_put(rem); + ret = -ENOMEM; + break; + } + + flags = v4l2_epn.bus.parallel.flags; + + if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) + subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW; + + if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) + subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW; + + if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) + subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW; + + if (v4l2_epn.bus_type == V4L2_MBUS_BT656) + subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC | + ISC_PFE_CFG0_CCIR656; + + subdev_entity->asd->match_type = V4L2_ASYNC_MATCH_FWNODE; + subdev_entity->asd->match.fwnode = + of_fwnode_handle(rem); + list_add_tail(&subdev_entity->list, &isc->subdev_entities); + } + + of_node_put(epn); + return ret; +} + +static int atmel_isc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct isc_device *isc; + struct resource *res; + void __iomem *io_base; + struct isc_subdev_entity *subdev_entity; + int irq; + int ret; + + isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL); + if (!isc) + return -ENOMEM; + + platform_set_drvdata(pdev, isc); + isc->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + io_base = devm_ioremap_resource(dev, res); + if (IS_ERR(io_base)) + return PTR_ERR(io_base); + + isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config); + if (IS_ERR(isc->regmap)) { + ret = PTR_ERR(isc->regmap); + dev_err(dev, "failed to init register map: %d\n", ret); + return ret; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + ret = irq; + dev_err(dev, "failed to get irq: %d\n", ret); + return ret; + } + + ret = devm_request_irq(dev, irq, isc_interrupt, 0, + ATMEL_ISC_NAME, isc); + if (ret < 0) { + dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n", + irq, ret); + return ret; + } + + ret = isc_pipeline_init(isc); + if (ret) + return ret; + + isc->hclock = devm_clk_get(dev, "hclock"); + if (IS_ERR(isc->hclock)) { + ret = PTR_ERR(isc->hclock); + dev_err(dev, "failed to get hclock: %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(isc->hclock); + if (ret) { + dev_err(dev, "failed to enable hclock: %d\n", ret); + return ret; + } + + ret = isc_clk_init(isc); + if (ret) { + dev_err(dev, "failed to init isc clock: %d\n", ret); + goto unprepare_hclk; + } + + isc->ispck = isc->isc_clks[ISC_ISPCK].clk; + + ret = clk_prepare_enable(isc->ispck); + if (ret) { + dev_err(dev, "failed to enable ispck: %d\n", ret); + goto unprepare_hclk; + } + + /* ispck should be greater or equal to hclock */ + ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock)); + if (ret) { + dev_err(dev, "failed to set ispck rate: %d\n", ret); + goto unprepare_clk; + } + + ret = v4l2_device_register(dev, &isc->v4l2_dev); + if (ret) { + dev_err(dev, "unable to register v4l2 device.\n"); + goto unprepare_clk; + } + + ret = isc_parse_dt(dev, isc); + if (ret) { + dev_err(dev, "fail to parse device tree\n"); + goto unregister_v4l2_device; + } + + if (list_empty(&isc->subdev_entities)) { + dev_err(dev, "no subdev found\n"); + ret = -ENODEV; + goto unregister_v4l2_device; + } + + list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { + v4l2_async_notifier_init(&subdev_entity->notifier); + + ret = v4l2_async_notifier_add_subdev(&subdev_entity->notifier, + subdev_entity->asd); + if (ret) { + fwnode_handle_put(subdev_entity->asd->match.fwnode); + kfree(subdev_entity->asd); + goto cleanup_subdev; + } + + subdev_entity->notifier.ops = &isc_async_ops; + + ret = v4l2_async_notifier_register(&isc->v4l2_dev, + &subdev_entity->notifier); + if (ret) { + dev_err(dev, "fail to register async notifier\n"); + goto cleanup_subdev; + } + + if (video_is_registered(&isc->video_dev)) + break; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_request_idle(dev); + + return 0; + +cleanup_subdev: + isc_subdev_cleanup(isc); + +unregister_v4l2_device: + v4l2_device_unregister(&isc->v4l2_dev); + +unprepare_clk: + clk_disable_unprepare(isc->ispck); +unprepare_hclk: + clk_disable_unprepare(isc->hclock); + + isc_clk_cleanup(isc); + + return ret; +} + +static int atmel_isc_remove(struct platform_device *pdev) +{ + struct isc_device *isc = platform_get_drvdata(pdev); + + pm_runtime_disable(&pdev->dev); + clk_disable_unprepare(isc->ispck); + clk_disable_unprepare(isc->hclock); + + isc_subdev_cleanup(isc); + + v4l2_device_unregister(&isc->v4l2_dev); + + isc_clk_cleanup(isc); + + return 0; +} + +static int __maybe_unused isc_runtime_suspend(struct device *dev) +{ + struct isc_device *isc = dev_get_drvdata(dev); + + clk_disable_unprepare(isc->ispck); + clk_disable_unprepare(isc->hclock); + + return 0; +} + +static int __maybe_unused isc_runtime_resume(struct device *dev) +{ + struct isc_device *isc = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(isc->hclock); + if (ret) + return ret; + + return clk_prepare_enable(isc->ispck); +} + +static const struct dev_pm_ops atmel_isc_dev_pm_ops = { + SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL) +}; + +static const struct of_device_id atmel_isc_of_match[] = { + { .compatible = "atmel,sama5d2-isc" }, + { } +}; +MODULE_DEVICE_TABLE(of, atmel_isc_of_match); + +static struct platform_driver atmel_isc_driver = { + .probe = atmel_isc_probe, + .remove = atmel_isc_remove, + .driver = { + .name = ATMEL_ISC_NAME, + .pm = &atmel_isc_dev_pm_ops, + .of_match_table = of_match_ptr(atmel_isc_of_match), + }, +}; + +module_platform_driver(atmel_isc_driver); + +MODULE_AUTHOR("Songjun Wu"); +MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC"); +MODULE_LICENSE("GPL v2"); +MODULE_SUPPORTED_DEVICE("video"); From patchwork Mon Jun 10 07:33:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eugen Hristev X-Patchwork-Id: 10984207 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 585501850 for ; Mon, 10 Jun 2019 07:33:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 44E6E28812 for ; Mon, 10 Jun 2019 07:33:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 38A8D28816; Mon, 10 Jun 2019 07:33:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A288C287EA for ; 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Fixed them by renaming, realigning and adding struct comments Signed-off-by: Eugen Hristev --- Changes in v4: - s/sync/serialize as requested by Sakari Changes in v3: - new patch, addresses the checkpatch issues that Hans asked to fix drivers/media/platform/atmel/atmel-isc.h | 51 +++++++++++++++++++++--- drivers/media/platform/atmel/atmel-sama5d2-isc.c | 4 +- 2 files changed, 48 insertions(+), 7 deletions(-) diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h index f633e10..5be5b09 100644 --- a/drivers/media/platform/atmel/atmel-isc.h +++ b/drivers/media/platform/atmel/atmel-isc.h @@ -24,14 +24,14 @@ struct isc_clk { struct clk_hw hw; struct clk *clk; struct regmap *regmap; - spinlock_t lock; + spinlock_t lock; /* serialize access to clock registers */ u8 id; u8 parent_id; u32 div; struct device *dev; }; -#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw) +#define to_isc_clk(v) container_of(v, struct isc_clk, hw) struct isc_buffer { struct vb2_v4l2_buffer vb; @@ -146,6 +146,47 @@ struct isc_ctrls { #define ISC_PIPE_LINE_NODE_NUM 11 +/* + * struct isc_device - ISC device driver data/config struct + * @regmap: Register map + * @hclock: Hclock clock input (refer datasheet) + * @ispck: iscpck clock (refer datasheet) + * @isc_clks: ISC clocks + * + * @dev: Registered device driver + * @v4l2_dev: v4l2 registered device + * @video_dev: registered video device + * + * @vb2_vidq: video buffer 2 video queue + * @dma_queue_lock: lock to serialize the dma buffer queue + * @dma_queue: the queue for dma buffers + * @cur_frm: current isc frame/buffer + * @sequence: current frame number + * @stop: true if isc is not streaming, false if streaming + * @comp: completion reference that signals frame completion + * + * @fmt: current v42l format + * @user_formats: list of formats that are supported and agreed with sd + * @num_user_formats: how many formats are in user_formats + * + * @config: current ISC format configuration + * @try_config: the current ISC try format , not yet activated + * + * @ctrls: holds information about ISC controls + * @do_wb_ctrl: control regarding the DO_WHITE_BALANCE button + * @awb_work: workqueue reference for autowhitebalance histogram + * analysis + * + * @lock: lock for serializing userspace file operations + * with ISC operations + * @awb_lock: lock for serializing awb work queue operations + * with DMA/buffer operations + * + * @pipeline: configuration of the ISC pipeline + * + * @current_subdev: current subdevice: the sensor + * @subdev_entities: list of subdevice entitites + */ struct isc_device { struct regmap *regmap; struct clk *hclock; @@ -157,7 +198,7 @@ struct isc_device { struct video_device video_dev; struct vb2_queue vb2_vidq; - spinlock_t dma_queue_lock; + spinlock_t dma_queue_lock; /* serialize access to dma queue */ struct list_head dma_queue; struct isc_buffer *cur_frm; unsigned int sequence; @@ -175,8 +216,8 @@ struct isc_device { struct v4l2_ctrl *do_wb_ctrl; struct work_struct awb_work; - struct mutex lock; - spinlock_t awb_lock; + struct mutex lock; /* serialize access to file operations */ + spinlock_t awb_lock; /* serialize access to DMA buffers from awb work queue */ struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM]; diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c index 93fb839..127e79c 100644 --- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c +++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c @@ -87,8 +87,8 @@ static int isc_parse_dt(struct device *dev, struct isc_device *isc) break; } - subdev_entity = devm_kzalloc(dev, - sizeof(*subdev_entity), GFP_KERNEL); + subdev_entity = devm_kzalloc(dev, sizeof(*subdev_entity), + GFP_KERNEL); if (!subdev_entity) { of_node_put(rem); ret = -ENOMEM;