| Message ID | 1461590572-4027-8-git-send-email-maxime.ripard@free-electrons.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Mon, 25 Apr 2016 15:22:48 +0200 Maxime Ripard <maxime.ripard@free-electrons.com> wrote: > Some Allwinner SoCs have an IP called the TV encoder that is used to output > composite and VGA signals. In such a case, we need to use the second TCON > channel. > > Add support for that TV encoder. > > Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> > --- > drivers/gpu/drm/sun4i/Makefile | 2 + > drivers/gpu/drm/sun4i/sun4i_tv.c | 621 +++++++++++++++++++++++++++++++++++++++ > 2 files changed, 623 insertions(+) > create mode 100644 drivers/gpu/drm/sun4i/sun4i_tv.c > > diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile > index 74f804b88ff5..58cd55149827 100644 > --- a/drivers/gpu/drm/sun4i/Makefile > +++ b/drivers/gpu/drm/sun4i/Makefile > @@ -9,3 +9,5 @@ sun4i-tcon-y += sun4i_dotclock.o > > obj-$(CONFIG_DRM_SUN4I) += sun4i-drm.o sun4i-tcon.o > obj-$(CONFIG_DRM_SUN4I) += sun4i_backend.o > + > +obj-$(CONFIG_DRM_SUN4I) += sun4i_tv.o > diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c > new file mode 100644 > index 000000000000..78634dfc0f77 > --- /dev/null > +++ b/drivers/gpu/drm/sun4i/sun4i_tv.c > @@ -0,0 +1,621 @@ > +/* > + * Copyright (C) 2015 Free Electrons > + * Copyright (C) 2015 NextThing Co > + * > + * Maxime Ripard <maxime.ripard@free-electrons.com> > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + */ > + > +#include <linux/clk.h> > +#include <linux/component.h> > +#include <linux/of_address.h> > +#include <linux/regmap.h> > +#include <linux/reset.h> > + > +#include <drm/drmP.h> > +#include <drm/drm_atomic_helper.h> > +#include <drm/drm_crtc_helper.h> > +#include <drm/drm_panel.h> > + > +#include "sun4i_backend.h" > +#include "sun4i_drv.h" > +#include "sun4i_tcon.h" > + > +#define SUN4I_TVE_EN_REG 0x000 > +#define SUN4I_TVE_EN_DAC_MAP_MASK GENMASK(19, 4) > +#define SUN4I_TVE_EN_DAC_MAP(dac, out) (((out) & 0xf) << (dac + 1) * 4) > +#define SUN4I_TVE_EN_ENABLE BIT(0) > + > +#define SUN4I_TVE_CFG0_REG 0x004 > +#define SUN4I_TVE_CFG0_DAC_CONTROL_54M BIT(26) > +#define SUN4I_TVE_CFG0_CORE_DATAPATH_54M BIT(25) > +#define SUN4I_TVE_CFG0_CORE_CONTROL_54M BIT(24) > +#define SUN4I_TVE_CFG0_YC_EN BIT(17) > +#define SUN4I_TVE_CFG0_COMP_EN BIT(16) > +#define SUN4I_TVE_CFG0_RES(x) ((x) & 0xf) > +#define SUN4I_TVE_CFG0_RES_480i SUN4I_TVE_CFG0_RES(0) > +#define SUN4I_TVE_CFG0_RES_576i SUN4I_TVE_CFG0_RES(1) > + > +#define SUN4I_TVE_DAC0_REG 0x008 > +#define SUN4I_TVE_DAC0_CLOCK_INVERT BIT(24) > +#define SUN4I_TVE_DAC0_LUMA(x) (((x) & 3) << 20) > +#define SUN4I_TVE_DAC0_LUMA_0_4 SUN4I_TVE_DAC0_LUMA(3) > +#define SUN4I_TVE_DAC0_CHROMA(x) (((x) & 3) << 18) > +#define SUN4I_TVE_DAC0_CHROMA_0_75 SUN4I_TVE_DAC0_CHROMA(3) > +#define SUN4I_TVE_DAC0_INTERNAL_DAC(x) (((x) & 3) << 16) > +#define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS SUN4I_TVE_DAC0_INTERNAL_DAC(3) > +#define SUN4I_TVE_DAC0_DAC_EN(dac) BIT(dac) > + > +#define SUN4I_TVE_NOTCH_REG 0x00c > +#define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3)) > + > +#define SUN4I_TVE_CHROMA_FREQ_REG 0x010 > + > +#define SUN4I_TVE_PORCH_REG 0x014 > +#define SUN4I_TVE_PORCH_BACK(x) ((x) << 16) > +#define SUN4I_TVE_PORCH_FRONT(x) (x) > + > +#define SUN4I_TVE_LINE_REG 0x01c > +#define SUN4I_TVE_LINE_FIRST(x) ((x) << 16) > +#define SUN4I_TVE_LINE_NUMBER(x) (x) > + > +#define SUN4I_TVE_LEVEL_REG 0x020 > +#define SUN4I_TVE_LEVEL_BLANK(x) ((x) << 16) > +#define SUN4I_TVE_LEVEL_BLACK(x) (x) > + > +#define SUN4I_TVE_DAC1_REG 0x024 > +#define SUN4I_TVE_DAC1_AMPLITUDE(dac, x) ((x) << (dac * 8)) > + > +#define SUN4I_TVE_DETECT_STA_REG 0x038 > +#define SUN4I_TVE_DETECT_STA_DAC(dac) BIT((dac * 8)) > +#define SUN4I_TVE_DETECT_STA_UNCONNECTED 0 > +#define SUN4I_TVE_DETECT_STA_CONNECTED 1 > +#define SUN4I_TVE_DETECT_STA_GROUND 2 > + > +#define SUN4I_TVE_CB_CR_LVL_REG 0x10c > +#define SUN4I_TVE_CB_CR_LVL_CR_BURST(x) ((x) << 8) > +#define SUN4I_TVE_CB_CR_LVL_CB_BURST(x) (x) > + > +#define SUN4I_TVE_TINT_BURST_PHASE_REG 0x110 > +#define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x) (x) > + > +#define SUN4I_TVE_BURST_WIDTH_REG 0x114 > +#define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x) ((x) << 16) > +#define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x) ((x) << 8) > +#define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x) (x) > + > +#define SUN4I_TVE_CB_CR_GAIN_REG 0x118 > +#define SUN4I_TVE_CB_CR_GAIN_CR(x) ((x) << 8) > +#define SUN4I_TVE_CB_CR_GAIN_CB(x) (x) > + > +#define SUN4I_TVE_SYNC_VBI_REG 0x11c > +#define SUN4I_TVE_SYNC_VBI_SYNC(x) ((x) << 16) > +#define SUN4I_TVE_SYNC_VBI_VBLANK(x) (x) > + > +#define SUN4I_TVE_ACTIVE_LINE_REG 0x124 > +#define SUN4I_TVE_ACTIVE_LINE(x) (x) > + > +#define SUN4I_TVE_CHROMA_REG 0x128 > +#define SUN4I_TVE_CHROMA_COMP_GAIN(x) ((x) & 3) > +#define SUN4I_TVE_CHROMA_COMP_GAIN_50 SUN4I_TVE_CHROMA_COMP_GAIN(2) > + > +#define SUN4I_TVE_12C_REG 0x12c > +#define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE BIT(8) > +#define SUN4I_TVE_12C_COMP_YUV_EN BIT(0) > + > +#define SUN4I_TVE_RESYNC_REG 0x130 > +#define SUN4I_TVE_RESYNC_FIELD BIT(31) > +#define SUN4I_TVE_RESYNC_LINE(x) ((x) << 16) > +#define SUN4I_TVE_RESYNC_PIXEL(x) (x) > + > +#define SUN4I_TVE_SLAVE_REG 0x134 > + > +#define SUN4I_TVE_WSS_DATA2_REG 0x244 > + > +struct color_gains { > + u16 cb; > + u16 cr; > +}; > + > +struct burst_levels { > + u16 cb; > + u16 cr; > +}; > + > +struct video_levels { > + u16 black; > + u16 blank; > +}; > + > +struct resync_parameters { > + bool field; > + u16 line; > + u16 pixel; > +}; > + > +struct tv_mode { > + char *name; > + > + u32 mode; > + u32 chroma_freq; > + u16 back_porch; > + u16 front_porch; > + u16 line_number; > + u16 vblank_level; > + > + u32 hdisplay; > + u16 hfront_porch; > + u16 hsync_len; > + u16 hback_porch; > + > + u32 vdisplay; > + u16 vfront_porch; > + u16 vsync_len; > + u16 vback_porch; > + > + bool yc_en; > + bool dac3_en; > + bool dac_bit25_en; > + > + struct color_gains *color_gains; > + struct burst_levels *burst_levels; > + struct video_levels *video_levels; > + struct resync_parameters *resync_params; > +}; > + > +struct sun4i_tv { > + struct drm_connector connector; > + struct drm_encoder encoder; > + > + struct clk *clk; > + struct regmap *regs; > + struct reset_control *reset; > + > + struct sun4i_drv *drv; > +}; > + > +struct tv_mode tv_modes[] = { > +}; > + > +static inline struct sun4i_tv * > +drm_encoder_to_sun4i_tv(struct drm_encoder *encoder) > +{ > + return container_of(encoder, struct sun4i_tv, > + encoder); > +} > + > +static inline struct sun4i_tv * > +drm_connector_to_sun4i_tv(struct drm_connector *connector) > +{ > + return container_of(connector, struct sun4i_tv, > + connector); > +} > + > +/* > + * FIXME: If only the drm_display_mode private field was usable, this > + * could go away... > + * > + * So far, it doesn't seem to be preserved when the mode is passed by > + * to mode_set for some reason. > + */ > +static struct tv_mode *sun4i_tv_find_tv_by_mode(struct drm_display_mode *mode) > +{ > + int i; > + > + /* First try to identify the mode by name */ > + for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { > + struct tv_mode *tv_mode = &tv_modes[i]; > + > + DRM_DEBUG_DRIVER("Comparing mode %s vs %s", > + mode->name, tv_mode->name); > + > + if (!strcmp(mode->name, tv_mode->name)) > + return tv_mode; > + } > + > + /* Then by number of lines */ > + for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { > + struct tv_mode *tv_mode = &tv_modes[i]; > + > + DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)", > + mode->name, tv_mode->name, > + mode->vdisplay, tv_mode->vdisplay); > + > + if (mode->vdisplay == tv_mode->vdisplay) > + return tv_mode; > + } > + > + return NULL; > +} > + > +static void sun4i_tv_mode_to_drm_mode(struct tv_mode *tv_mode, > + struct drm_display_mode *mode) > +{ > + DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name); > + > + mode->type = DRM_MODE_TYPE_DRIVER; > + mode->clock = 13500; > + mode->flags = DRM_MODE_FLAG_INTERLACE; > + > + mode->hdisplay = tv_mode->hdisplay; > + mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch; > + mode->hsync_end = mode->hsync_start + tv_mode->hsync_len; > + mode->htotal = mode->hsync_end + tv_mode->hback_porch; > + > + mode->vdisplay = tv_mode->vdisplay; > + mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch; > + mode->vsync_end = mode->vsync_start + tv_mode->vsync_len; > + mode->vtotal = mode->vsync_end + tv_mode->vback_porch; > +} > + > +static int sun4i_tv_atomic_check(struct drm_encoder *encoder, > + struct drm_crtc_state *crtc_state, > + struct drm_connector_state *conn_state) > +{ > + return 0; > +} > + > +static void sun4i_tv_disable(struct drm_encoder *encoder) > +{ > + struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); > + struct sun4i_drv *drv = tv->drv; > + struct sun4i_tcon *tcon = drv->tcon; > + > + DRM_DEBUG_DRIVER("Disabling the TV Output\n"); > + > + sun4i_tcon_channel_disable(tcon, 1); > + > + regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, > + SUN4I_TVE_EN_ENABLE, > + 0); > + sun4i_backend_disable_color_correction(drv->backend); > +} > + > +static void sun4i_tv_enable(struct drm_encoder *encoder) > +{ > + struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); > + struct sun4i_drv *drv = tv->drv; > + struct sun4i_tcon *tcon = drv->tcon; > + > + DRM_DEBUG_DRIVER("Enabling the TV Output\n"); > + > + sun4i_backend_apply_color_correction(drv->backend); > + > + regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, > + SUN4I_TVE_EN_ENABLE, > + SUN4I_TVE_EN_ENABLE); > + > + sun4i_tcon_channel_enable(tcon, 1); > +} > + > +static void sun4i_tv_mode_set(struct drm_encoder *encoder, > + struct drm_display_mode *mode, > + struct drm_display_mode *adjusted_mode) > +{ > + struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); > + struct sun4i_drv *drv = tv->drv; > + struct sun4i_tcon *tcon = drv->tcon; > + struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode); > + > + sun4i_tcon1_mode_set(tcon, mode); > + > + /* Enable and map the DAC to the output */ > + regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, > + SUN4I_TVE_EN_DAC_MAP_MASK, > + SUN4I_TVE_EN_DAC_MAP(0, 1) | > + SUN4I_TVE_EN_DAC_MAP(1, 2) | > + SUN4I_TVE_EN_DAC_MAP(2, 3) | > + SUN4I_TVE_EN_DAC_MAP(3, 4)); > + > + /* Set PAL settings */ > + regmap_write(tv->regs, SUN4I_TVE_CFG0_REG, > + tv_mode->mode | > + (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) | > + SUN4I_TVE_CFG0_COMP_EN | > + SUN4I_TVE_CFG0_DAC_CONTROL_54M | > + SUN4I_TVE_CFG0_CORE_DATAPATH_54M | > + SUN4I_TVE_CFG0_CORE_CONTROL_54M); > + > + /* Configure the DAC for a composite output */ > + regmap_write(tv->regs, SUN4I_TVE_DAC0_REG, > + SUN4I_TVE_DAC0_DAC_EN(0) | > + (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) | > + SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS | > + SUN4I_TVE_DAC0_CHROMA_0_75 | > + SUN4I_TVE_DAC0_LUMA_0_4 | > + SUN4I_TVE_DAC0_CLOCK_INVERT | > + (tv_mode->dac_bit25_en ? BIT(25) : 0) | > + BIT(30)); > + > + /* Configure the sample delay between DAC0 and the other DAC */ > + regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG, > + SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) | > + SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0)); > + > + regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG, > + tv_mode->chroma_freq); > + > + /* Set the front and back porch */ > + regmap_write(tv->regs, SUN4I_TVE_PORCH_REG, > + SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) | > + SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch)); > + > + /* Set the lines setup */ > + regmap_write(tv->regs, SUN4I_TVE_LINE_REG, > + SUN4I_TVE_LINE_FIRST(22) | > + SUN4I_TVE_LINE_NUMBER(tv_mode->line_number)); > + > + regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG, > + SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) | > + SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black)); > + > + regmap_write(tv->regs, SUN4I_TVE_DAC1_REG, > + SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) | > + SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) | > + SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) | > + SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18)); > + > + regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG, > + SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) | > + SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr)); > + > + /* Set burst width for a composite output */ > + regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG, > + SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) | > + SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) | > + SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22)); > + > + regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG, > + SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) | > + SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr)); > + > + regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG, > + SUN4I_TVE_SYNC_VBI_SYNC(0x10) | > + SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level)); > + > + regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG, > + SUN4I_TVE_ACTIVE_LINE(1440)); > + > + /* Set composite chroma gain to 50 % */ > + regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG, > + SUN4I_TVE_CHROMA_COMP_GAIN_50); > + > + regmap_write(tv->regs, SUN4I_TVE_12C_REG, > + SUN4I_TVE_12C_COMP_YUV_EN | > + SUN4I_TVE_12C_NOTCH_WIDTH_WIDE); > + > + regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG, > + SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) | > + SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) | > + (tv_mode->resync_params->field ? > + SUN4I_TVE_RESYNC_FIELD : 0)); > + > + regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0); > + > + clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000); > +} > + > +static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = { > + .atomic_check = sun4i_tv_atomic_check, > + .disable = sun4i_tv_disable, > + .enable = sun4i_tv_enable, > + .mode_set = sun4i_tv_mode_set, > +}; > + > +static void sun4i_tv_destroy(struct drm_encoder *encoder) > +{ > + drm_encoder_cleanup(encoder); > +} > + > +static struct drm_encoder_funcs sun4i_tv_funcs = { > + .destroy = sun4i_tv_destroy, > +}; > + > +static int sun4i_tv_comp_get_modes(struct drm_connector *connector) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { > + struct drm_display_mode *mode = drm_mode_create(connector->dev); > + struct tv_mode *tv_mode = &tv_modes[i]; > + > + strcpy(mode->name, tv_mode->name); > + > + sun4i_tv_mode_to_drm_mode(tv_mode, mode); > + drm_mode_probed_add(connector, mode); > + } > + > + return i; > +} > + > +static int sun4i_tv_comp_mode_valid(struct drm_connector *connector, > + struct drm_display_mode *mode) > +{ > + /* TODO */ > + return MODE_OK; > +} > + > +static struct drm_encoder * > +sun4i_tv_comp_best_encoder(struct drm_connector *connector) > +{ > + struct sun4i_tv *tv = drm_connector_to_sun4i_tv(connector); > + > + return &tv->encoder; > +} > + > +static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = { > + .get_modes = sun4i_tv_comp_get_modes, > + .mode_valid = sun4i_tv_comp_mode_valid, > + .best_encoder = sun4i_tv_comp_best_encoder, > +}; > + > +static enum drm_connector_status > +sun4i_tv_comp_connector_detect(struct drm_connector *connector, bool force) > +{ > + return connector_status_connected; > +} > + > +static void > +sun4i_tv_comp_connector_destroy(struct drm_connector *connector) > +{ > + drm_connector_cleanup(connector); > +} > + > +static struct drm_connector_funcs sun4i_tv_comp_connector_funcs = { > + .dpms = drm_atomic_helper_connector_dpms, > + .detect = sun4i_tv_comp_connector_detect, > + .fill_modes = drm_helper_probe_single_connector_modes, > + .destroy = sun4i_tv_comp_connector_destroy, > + .reset = drm_atomic_helper_connector_reset, > + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, > + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > +}; > + > +static struct regmap_config sun4i_tv_regmap_config = { > + .reg_bits = 32, > + .val_bits = 32, > + .reg_stride = 4, > + .max_register = SUN4I_TVE_WSS_DATA2_REG, > + .name = "tv-encoder", > +}; > + > +static int sun4i_tv_bind(struct device *dev, struct device *master, > + void *data) > +{ > + struct platform_device *pdev = to_platform_device(dev); > + struct drm_device *drm = data; > + struct sun4i_drv *drv = drm->dev_private; > + struct sun4i_tv *tv; > + struct resource *res; > + void __iomem *regs; > + int ret; > + > + tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL); > + if (!tv) > + return -ENOMEM; > + tv->drv = drv; > + dev_set_drvdata(dev, tv); > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + regs = devm_ioremap_resource(dev, res); > + if (IS_ERR(regs)) { > + dev_err(dev, "Couldn't map the TV encoder registers\n"); > + return PTR_ERR(regs); > + } > + > + tv->regs = devm_regmap_init_mmio(dev, regs, > + &sun4i_tv_regmap_config); > + if (IS_ERR(tv->regs)) { > + dev_err(dev, "Couldn't create the TV encoder regmap\n"); > + return PTR_ERR(tv->regs); > + } > + > + tv->reset = devm_reset_control_get(dev, NULL); > + if (IS_ERR(tv->reset)) { > + dev_err(dev, "Couldn't get our reset line\n"); > + return PTR_ERR(tv->reset); > + } > + > + ret = reset_control_deassert(tv->reset); > + if (ret) { > + dev_err(dev, "Couldn't deassert our reset line\n"); > + return ret; > + } > + > + tv->clk = devm_clk_get(dev, NULL); > + if (IS_ERR(tv->clk)) { > + dev_err(dev, "Couldn't get the TV encoder clock\n"); > + ret = PTR_ERR(tv->clk); > + goto err_assert_reset; > + } > + clk_prepare_enable(tv->clk); > + > + drm_encoder_helper_add(&tv->encoder, > + &sun4i_tv_helper_funcs); > + ret = drm_encoder_init(drm, > + &tv->encoder, > + &sun4i_tv_funcs, > + DRM_MODE_ENCODER_TVDAC, > + NULL); > + if (ret) { > + dev_err(dev, "Couldn't initialise the TV encoder\n"); > + goto err_disable_clk; > + } > + > + tv->encoder.possible_crtcs = BIT(0); > + > + drm_connector_helper_add(&tv->connector, > + &sun4i_tv_comp_connector_helper_funcs); > + ret = drm_connector_init(drm, &tv->connector, > + &sun4i_tv_comp_connector_funcs, > + DRM_MODE_CONNECTOR_Composite); > + if (ret) { > + dev_err(dev, > + "Couldn't initialise the Composite connector\n"); > + goto err_cleanup_connector; > + } > + tv->connector.interlace_allowed = true; > + > + drm_mode_connector_attach_encoder(&tv->connector, &tv->encoder); > + > + return 0; > + > +err_cleanup_connector: > + drm_encoder_cleanup(&tv->encoder); > +err_disable_clk: > + clk_disable_unprepare(tv->clk); > +err_assert_reset: > + reset_control_assert(tv->reset); > + return ret; > +} > + > +static void sun4i_tv_unbind(struct device *dev, struct device *master, > + void *data) > +{ > + struct sun4i_tv *tv = dev_get_drvdata(dev); > + > + drm_connector_cleanup(&tv->connector); > + drm_encoder_cleanup(&tv->encoder); > + clk_disable_unprepare(tv->clk); > +} > + > +static struct component_ops sun4i_tv_ops = { > + .bind = sun4i_tv_bind, > + .unbind = sun4i_tv_unbind, > +}; > + > +static int sun4i_tv_probe(struct platform_device *pdev) > +{ > + return component_add(&pdev->dev, &sun4i_tv_ops); > +} > + > +static int sun4i_tv_remove(struct platform_device *pdev) > +{ > + component_del(&pdev->dev, &sun4i_tv_ops); > + > + return 0; > +} > + > +static const struct of_device_id sun4i_tv_of_table[] = { > + { .compatible = "allwinner,sun4i-a10-tv-encoder" }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, sun4i_tv_of_table); > + > +static struct platform_driver sun4i_tv_platform_driver = { > + .probe = sun4i_tv_probe, > + .remove = sun4i_tv_remove, > + .driver = { > + .name = "sun4i-tve", > + .of_match_table = sun4i_tv_of_table, > + }, > +}; > +module_platform_driver(sun4i_tv_platform_driver); > + > +MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); > +MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver"); > +MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile index 74f804b88ff5..58cd55149827 100644 --- a/drivers/gpu/drm/sun4i/Makefile +++ b/drivers/gpu/drm/sun4i/Makefile @@ -9,3 +9,5 @@ sun4i-tcon-y += sun4i_dotclock.o obj-$(CONFIG_DRM_SUN4I) += sun4i-drm.o sun4i-tcon.o obj-$(CONFIG_DRM_SUN4I) += sun4i_backend.o + +obj-$(CONFIG_DRM_SUN4I) += sun4i_tv.o diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c new file mode 100644 index 000000000000..78634dfc0f77 --- /dev/null +++ b/drivers/gpu/drm/sun4i/sun4i_tv.c @@ -0,0 +1,621 @@ +/* + * Copyright (C) 2015 Free Electrons + * Copyright (C) 2015 NextThing Co + * + * Maxime Ripard <maxime.ripard@free-electrons.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/of_address.h> +#include <linux/regmap.h> +#include <linux/reset.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_panel.h> + +#include "sun4i_backend.h" +#include "sun4i_drv.h" +#include "sun4i_tcon.h" + +#define SUN4I_TVE_EN_REG 0x000 +#define SUN4I_TVE_EN_DAC_MAP_MASK GENMASK(19, 4) +#define SUN4I_TVE_EN_DAC_MAP(dac, out) (((out) & 0xf) << (dac + 1) * 4) +#define SUN4I_TVE_EN_ENABLE BIT(0) + +#define SUN4I_TVE_CFG0_REG 0x004 +#define SUN4I_TVE_CFG0_DAC_CONTROL_54M BIT(26) +#define SUN4I_TVE_CFG0_CORE_DATAPATH_54M BIT(25) +#define SUN4I_TVE_CFG0_CORE_CONTROL_54M BIT(24) +#define SUN4I_TVE_CFG0_YC_EN BIT(17) +#define SUN4I_TVE_CFG0_COMP_EN BIT(16) +#define SUN4I_TVE_CFG0_RES(x) ((x) & 0xf) +#define SUN4I_TVE_CFG0_RES_480i SUN4I_TVE_CFG0_RES(0) +#define SUN4I_TVE_CFG0_RES_576i SUN4I_TVE_CFG0_RES(1) + +#define SUN4I_TVE_DAC0_REG 0x008 +#define SUN4I_TVE_DAC0_CLOCK_INVERT BIT(24) +#define SUN4I_TVE_DAC0_LUMA(x) (((x) & 3) << 20) +#define SUN4I_TVE_DAC0_LUMA_0_4 SUN4I_TVE_DAC0_LUMA(3) +#define SUN4I_TVE_DAC0_CHROMA(x) (((x) & 3) << 18) +#define SUN4I_TVE_DAC0_CHROMA_0_75 SUN4I_TVE_DAC0_CHROMA(3) +#define SUN4I_TVE_DAC0_INTERNAL_DAC(x) (((x) & 3) << 16) +#define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS SUN4I_TVE_DAC0_INTERNAL_DAC(3) +#define SUN4I_TVE_DAC0_DAC_EN(dac) BIT(dac) + +#define SUN4I_TVE_NOTCH_REG 0x00c +#define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3)) + +#define SUN4I_TVE_CHROMA_FREQ_REG 0x010 + +#define SUN4I_TVE_PORCH_REG 0x014 +#define SUN4I_TVE_PORCH_BACK(x) ((x) << 16) +#define SUN4I_TVE_PORCH_FRONT(x) (x) + +#define SUN4I_TVE_LINE_REG 0x01c +#define SUN4I_TVE_LINE_FIRST(x) ((x) << 16) +#define SUN4I_TVE_LINE_NUMBER(x) (x) + +#define SUN4I_TVE_LEVEL_REG 0x020 +#define SUN4I_TVE_LEVEL_BLANK(x) ((x) << 16) +#define SUN4I_TVE_LEVEL_BLACK(x) (x) + +#define SUN4I_TVE_DAC1_REG 0x024 +#define SUN4I_TVE_DAC1_AMPLITUDE(dac, x) ((x) << (dac * 8)) + +#define SUN4I_TVE_DETECT_STA_REG 0x038 +#define SUN4I_TVE_DETECT_STA_DAC(dac) BIT((dac * 8)) +#define SUN4I_TVE_DETECT_STA_UNCONNECTED 0 +#define SUN4I_TVE_DETECT_STA_CONNECTED 1 +#define SUN4I_TVE_DETECT_STA_GROUND 2 + +#define SUN4I_TVE_CB_CR_LVL_REG 0x10c +#define SUN4I_TVE_CB_CR_LVL_CR_BURST(x) ((x) << 8) +#define SUN4I_TVE_CB_CR_LVL_CB_BURST(x) (x) + +#define SUN4I_TVE_TINT_BURST_PHASE_REG 0x110 +#define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x) (x) + +#define SUN4I_TVE_BURST_WIDTH_REG 0x114 +#define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x) ((x) << 16) +#define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x) ((x) << 8) +#define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x) (x) + +#define SUN4I_TVE_CB_CR_GAIN_REG 0x118 +#define SUN4I_TVE_CB_CR_GAIN_CR(x) ((x) << 8) +#define SUN4I_TVE_CB_CR_GAIN_CB(x) (x) + +#define SUN4I_TVE_SYNC_VBI_REG 0x11c +#define SUN4I_TVE_SYNC_VBI_SYNC(x) ((x) << 16) +#define SUN4I_TVE_SYNC_VBI_VBLANK(x) (x) + +#define SUN4I_TVE_ACTIVE_LINE_REG 0x124 +#define SUN4I_TVE_ACTIVE_LINE(x) (x) + +#define SUN4I_TVE_CHROMA_REG 0x128 +#define SUN4I_TVE_CHROMA_COMP_GAIN(x) ((x) & 3) +#define SUN4I_TVE_CHROMA_COMP_GAIN_50 SUN4I_TVE_CHROMA_COMP_GAIN(2) + +#define SUN4I_TVE_12C_REG 0x12c +#define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE BIT(8) +#define SUN4I_TVE_12C_COMP_YUV_EN BIT(0) + +#define SUN4I_TVE_RESYNC_REG 0x130 +#define SUN4I_TVE_RESYNC_FIELD BIT(31) +#define SUN4I_TVE_RESYNC_LINE(x) ((x) << 16) +#define SUN4I_TVE_RESYNC_PIXEL(x) (x) + +#define SUN4I_TVE_SLAVE_REG 0x134 + +#define SUN4I_TVE_WSS_DATA2_REG 0x244 + +struct color_gains { + u16 cb; + u16 cr; +}; + +struct burst_levels { + u16 cb; + u16 cr; +}; + +struct video_levels { + u16 black; + u16 blank; +}; + +struct resync_parameters { + bool field; + u16 line; + u16 pixel; +}; + +struct tv_mode { + char *name; + + u32 mode; + u32 chroma_freq; + u16 back_porch; + u16 front_porch; + u16 line_number; + u16 vblank_level; + + u32 hdisplay; + u16 hfront_porch; + u16 hsync_len; + u16 hback_porch; + + u32 vdisplay; + u16 vfront_porch; + u16 vsync_len; + u16 vback_porch; + + bool yc_en; + bool dac3_en; + bool dac_bit25_en; + + struct color_gains *color_gains; + struct burst_levels *burst_levels; + struct video_levels *video_levels; + struct resync_parameters *resync_params; +}; + +struct sun4i_tv { + struct drm_connector connector; + struct drm_encoder encoder; + + struct clk *clk; + struct regmap *regs; + struct reset_control *reset; + + struct sun4i_drv *drv; +}; + +struct tv_mode tv_modes[] = { +}; + +static inline struct sun4i_tv * +drm_encoder_to_sun4i_tv(struct drm_encoder *encoder) +{ + return container_of(encoder, struct sun4i_tv, + encoder); +} + +static inline struct sun4i_tv * +drm_connector_to_sun4i_tv(struct drm_connector *connector) +{ + return container_of(connector, struct sun4i_tv, + connector); +} + +/* + * FIXME: If only the drm_display_mode private field was usable, this + * could go away... + * + * So far, it doesn't seem to be preserved when the mode is passed by + * to mode_set for some reason. + */ +static struct tv_mode *sun4i_tv_find_tv_by_mode(struct drm_display_mode *mode) +{ + int i; + + /* First try to identify the mode by name */ + for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { + struct tv_mode *tv_mode = &tv_modes[i]; + + DRM_DEBUG_DRIVER("Comparing mode %s vs %s", + mode->name, tv_mode->name); + + if (!strcmp(mode->name, tv_mode->name)) + return tv_mode; + } + + /* Then by number of lines */ + for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { + struct tv_mode *tv_mode = &tv_modes[i]; + + DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)", + mode->name, tv_mode->name, + mode->vdisplay, tv_mode->vdisplay); + + if (mode->vdisplay == tv_mode->vdisplay) + return tv_mode; + } + + return NULL; +} + +static void sun4i_tv_mode_to_drm_mode(struct tv_mode *tv_mode, + struct drm_display_mode *mode) +{ + DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name); + + mode->type = DRM_MODE_TYPE_DRIVER; + mode->clock = 13500; + mode->flags = DRM_MODE_FLAG_INTERLACE; + + mode->hdisplay = tv_mode->hdisplay; + mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch; + mode->hsync_end = mode->hsync_start + tv_mode->hsync_len; + mode->htotal = mode->hsync_end + tv_mode->hback_porch; + + mode->vdisplay = tv_mode->vdisplay; + mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch; + mode->vsync_end = mode->vsync_start + tv_mode->vsync_len; + mode->vtotal = mode->vsync_end + tv_mode->vback_porch; +} + +static int sun4i_tv_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + return 0; +} + +static void sun4i_tv_disable(struct drm_encoder *encoder) +{ + struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); + struct sun4i_drv *drv = tv->drv; + struct sun4i_tcon *tcon = drv->tcon; + + DRM_DEBUG_DRIVER("Disabling the TV Output\n"); + + sun4i_tcon_channel_disable(tcon, 1); + + regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, + SUN4I_TVE_EN_ENABLE, + 0); + sun4i_backend_disable_color_correction(drv->backend); +} + +static void sun4i_tv_enable(struct drm_encoder *encoder) +{ + struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); + struct sun4i_drv *drv = tv->drv; + struct sun4i_tcon *tcon = drv->tcon; + + DRM_DEBUG_DRIVER("Enabling the TV Output\n"); + + sun4i_backend_apply_color_correction(drv->backend); + + regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, + SUN4I_TVE_EN_ENABLE, + SUN4I_TVE_EN_ENABLE); + + sun4i_tcon_channel_enable(tcon, 1); +} + +static void sun4i_tv_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder); + struct sun4i_drv *drv = tv->drv; + struct sun4i_tcon *tcon = drv->tcon; + struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode); + + sun4i_tcon1_mode_set(tcon, mode); + + /* Enable and map the DAC to the output */ + regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG, + SUN4I_TVE_EN_DAC_MAP_MASK, + SUN4I_TVE_EN_DAC_MAP(0, 1) | + SUN4I_TVE_EN_DAC_MAP(1, 2) | + SUN4I_TVE_EN_DAC_MAP(2, 3) | + SUN4I_TVE_EN_DAC_MAP(3, 4)); + + /* Set PAL settings */ + regmap_write(tv->regs, SUN4I_TVE_CFG0_REG, + tv_mode->mode | + (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) | + SUN4I_TVE_CFG0_COMP_EN | + SUN4I_TVE_CFG0_DAC_CONTROL_54M | + SUN4I_TVE_CFG0_CORE_DATAPATH_54M | + SUN4I_TVE_CFG0_CORE_CONTROL_54M); + + /* Configure the DAC for a composite output */ + regmap_write(tv->regs, SUN4I_TVE_DAC0_REG, + SUN4I_TVE_DAC0_DAC_EN(0) | + (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) | + SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS | + SUN4I_TVE_DAC0_CHROMA_0_75 | + SUN4I_TVE_DAC0_LUMA_0_4 | + SUN4I_TVE_DAC0_CLOCK_INVERT | + (tv_mode->dac_bit25_en ? BIT(25) : 0) | + BIT(30)); + + /* Configure the sample delay between DAC0 and the other DAC */ + regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG, + SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) | + SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0)); + + regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG, + tv_mode->chroma_freq); + + /* Set the front and back porch */ + regmap_write(tv->regs, SUN4I_TVE_PORCH_REG, + SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) | + SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch)); + + /* Set the lines setup */ + regmap_write(tv->regs, SUN4I_TVE_LINE_REG, + SUN4I_TVE_LINE_FIRST(22) | + SUN4I_TVE_LINE_NUMBER(tv_mode->line_number)); + + regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG, + SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) | + SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black)); + + regmap_write(tv->regs, SUN4I_TVE_DAC1_REG, + SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) | + SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) | + SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) | + SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18)); + + regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG, + SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) | + SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr)); + + /* Set burst width for a composite output */ + regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG, + SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) | + SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) | + SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22)); + + regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG, + SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) | + SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr)); + + regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG, + SUN4I_TVE_SYNC_VBI_SYNC(0x10) | + SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level)); + + regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG, + SUN4I_TVE_ACTIVE_LINE(1440)); + + /* Set composite chroma gain to 50 % */ + regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG, + SUN4I_TVE_CHROMA_COMP_GAIN_50); + + regmap_write(tv->regs, SUN4I_TVE_12C_REG, + SUN4I_TVE_12C_COMP_YUV_EN | + SUN4I_TVE_12C_NOTCH_WIDTH_WIDE); + + regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG, + SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) | + SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) | + (tv_mode->resync_params->field ? + SUN4I_TVE_RESYNC_FIELD : 0)); + + regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0); + + clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000); +} + +static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = { + .atomic_check = sun4i_tv_atomic_check, + .disable = sun4i_tv_disable, + .enable = sun4i_tv_enable, + .mode_set = sun4i_tv_mode_set, +}; + +static void sun4i_tv_destroy(struct drm_encoder *encoder) +{ + drm_encoder_cleanup(encoder); +} + +static struct drm_encoder_funcs sun4i_tv_funcs = { + .destroy = sun4i_tv_destroy, +}; + +static int sun4i_tv_comp_get_modes(struct drm_connector *connector) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { + struct drm_display_mode *mode = drm_mode_create(connector->dev); + struct tv_mode *tv_mode = &tv_modes[i]; + + strcpy(mode->name, tv_mode->name); + + sun4i_tv_mode_to_drm_mode(tv_mode, mode); + drm_mode_probed_add(connector, mode); + } + + return i; +} + +static int sun4i_tv_comp_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + /* TODO */ + return MODE_OK; +} + +static struct drm_encoder * +sun4i_tv_comp_best_encoder(struct drm_connector *connector) +{ + struct sun4i_tv *tv = drm_connector_to_sun4i_tv(connector); + + return &tv->encoder; +} + +static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = { + .get_modes = sun4i_tv_comp_get_modes, + .mode_valid = sun4i_tv_comp_mode_valid, + .best_encoder = sun4i_tv_comp_best_encoder, +}; + +static enum drm_connector_status +sun4i_tv_comp_connector_detect(struct drm_connector *connector, bool force) +{ + return connector_status_connected; +} + +static void +sun4i_tv_comp_connector_destroy(struct drm_connector *connector) +{ + drm_connector_cleanup(connector); +} + +static struct drm_connector_funcs sun4i_tv_comp_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .detect = sun4i_tv_comp_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = sun4i_tv_comp_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static struct regmap_config sun4i_tv_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = SUN4I_TVE_WSS_DATA2_REG, + .name = "tv-encoder", +}; + +static int sun4i_tv_bind(struct device *dev, struct device *master, + void *data) +{ + struct platform_device *pdev = to_platform_device(dev); + struct drm_device *drm = data; + struct sun4i_drv *drv = drm->dev_private; + struct sun4i_tv *tv; + struct resource *res; + void __iomem *regs; + int ret; + + tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL); + if (!tv) + return -ENOMEM; + tv->drv = drv; + dev_set_drvdata(dev, tv); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + regs = devm_ioremap_resource(dev, res); + if (IS_ERR(regs)) { + dev_err(dev, "Couldn't map the TV encoder registers\n"); + return PTR_ERR(regs); + } + + tv->regs = devm_regmap_init_mmio(dev, regs, + &sun4i_tv_regmap_config); + if (IS_ERR(tv->regs)) { + dev_err(dev, "Couldn't create the TV encoder regmap\n"); + return PTR_ERR(tv->regs); + } + + tv->reset = devm_reset_control_get(dev, NULL); + if (IS_ERR(tv->reset)) { + dev_err(dev, "Couldn't get our reset line\n"); + return PTR_ERR(tv->reset); + } + + ret = reset_control_deassert(tv->reset); + if (ret) { + dev_err(dev, "Couldn't deassert our reset line\n"); + return ret; + } + + tv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(tv->clk)) { + dev_err(dev, "Couldn't get the TV encoder clock\n"); + ret = PTR_ERR(tv->clk); + goto err_assert_reset; + } + clk_prepare_enable(tv->clk); + + drm_encoder_helper_add(&tv->encoder, + &sun4i_tv_helper_funcs); + ret = drm_encoder_init(drm, + &tv->encoder, + &sun4i_tv_funcs, + DRM_MODE_ENCODER_TVDAC, + NULL); + if (ret) { + dev_err(dev, "Couldn't initialise the TV encoder\n"); + goto err_disable_clk; + } + + tv->encoder.possible_crtcs = BIT(0); + + drm_connector_helper_add(&tv->connector, + &sun4i_tv_comp_connector_helper_funcs); + ret = drm_connector_init(drm, &tv->connector, + &sun4i_tv_comp_connector_funcs, + DRM_MODE_CONNECTOR_Composite); + if (ret) { + dev_err(dev, + "Couldn't initialise the Composite connector\n"); + goto err_cleanup_connector; + } + tv->connector.interlace_allowed = true; + + drm_mode_connector_attach_encoder(&tv->connector, &tv->encoder); + + return 0; + +err_cleanup_connector: + drm_encoder_cleanup(&tv->encoder); +err_disable_clk: + clk_disable_unprepare(tv->clk); +err_assert_reset: + reset_control_assert(tv->reset); + return ret; +} + +static void sun4i_tv_unbind(struct device *dev, struct device *master, + void *data) +{ + struct sun4i_tv *tv = dev_get_drvdata(dev); + + drm_connector_cleanup(&tv->connector); + drm_encoder_cleanup(&tv->encoder); + clk_disable_unprepare(tv->clk); +} + +static struct component_ops sun4i_tv_ops = { + .bind = sun4i_tv_bind, + .unbind = sun4i_tv_unbind, +}; + +static int sun4i_tv_probe(struct platform_device *pdev) +{ + return component_add(&pdev->dev, &sun4i_tv_ops); +} + +static int sun4i_tv_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &sun4i_tv_ops); + + return 0; +} + +static const struct of_device_id sun4i_tv_of_table[] = { + { .compatible = "allwinner,sun4i-a10-tv-encoder" }, + { } +}; +MODULE_DEVICE_TABLE(of, sun4i_tv_of_table); + +static struct platform_driver sun4i_tv_platform_driver = { + .probe = sun4i_tv_probe, + .remove = sun4i_tv_remove, + .driver = { + .name = "sun4i-tve", + .of_match_table = sun4i_tv_of_table, + }, +}; +module_platform_driver(sun4i_tv_platform_driver); + +MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); +MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver"); +MODULE_LICENSE("GPL");
Some Allwinner SoCs have an IP called the TV encoder that is used to output composite and VGA signals. In such a case, we need to use the second TCON channel. Add support for that TV encoder. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> --- drivers/gpu/drm/sun4i/Makefile | 2 + drivers/gpu/drm/sun4i/sun4i_tv.c | 621 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 623 insertions(+) create mode 100644 drivers/gpu/drm/sun4i/sun4i_tv.c