| Message ID | 1418117346-9078-3-git-send-email-human.hwang@samsung.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
Hi Thierry, Ping~. Or is it ok to pick up this patch to my tree, exynos-drm-next? It doesn't seem to care for a long time. Thanks, Inki Dae On 2014? 12? 09? 18:29, Hyungwon Hwang wrote: > From: Inki Dae <inki.dae@samsung.com> > > This patch adds MIPI-DSI based S6E63J0X03 AMOLED LCD panel driver > which uses mipi_dsi bus to communicate with panel. The panel has > 320×320 resolution in 1.63-inch physical panel. This panel is used in > Samsung Galaxy Gear 2. > > Signed-off-by: Inki Dae <inki.dae@samsung.com> > Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com> > Acked-by: Kyungmin Park <kyungmin.park@samsung.com> > --- > Changes for v2: > - Change the gamma table to 2-dimensional array > - Change the way to make index for brightness > - Make command functions to an array so that it can be called simply > - Change command id for reading device ID > - Change the way to handle the error condition > - Remove power variable, and use the same name variable in bl_dev > - Add the state FB_BLANK_NORMAL to represent the state which the panel > is working but blanked > - Miscellaneous changes to increase the readability and follow the > coding-style standard > > drivers/gpu/drm/panel/Kconfig | 6 + > drivers/gpu/drm/panel/Makefile | 1 + > drivers/gpu/drm/panel/panel-s6e63j0x03.c | 549 +++++++++++++++++++++++++++++++ > 3 files changed, 556 insertions(+) > create mode 100644 drivers/gpu/drm/panel/panel-s6e63j0x03.c > > diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig > index bee9f72..bc133e2 100644 > --- a/drivers/gpu/drm/panel/Kconfig > +++ b/drivers/gpu/drm/panel/Kconfig > @@ -27,4 +27,10 @@ config DRM_PANEL_S6E8AA0 > select DRM_MIPI_DSI > select VIDEOMODE_HELPERS > > +config DRM_PANEL_S6E63J0X03 > + tristate "S6E63J0X03 DSI video mode panel" > + depends on OF > + select DRM_MIPI_DSI > + select VIDEOMODE_HELPERS > + > endmenu > diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile > index 8b92921..7f36dc2 100644 > --- a/drivers/gpu/drm/panel/Makefile > +++ b/drivers/gpu/drm/panel/Makefile > @@ -1,3 +1,4 @@ > obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o > obj-$(CONFIG_DRM_PANEL_LD9040) += panel-ld9040.o > obj-$(CONFIG_DRM_PANEL_S6E8AA0) += panel-s6e8aa0.o > +obj-$(CONFIG_DRM_PANEL_S6E63J0X03) += panel-s6e63j0x03.o > diff --git a/drivers/gpu/drm/panel/panel-s6e63j0x03.c b/drivers/gpu/drm/panel/panel-s6e63j0x03.c > new file mode 100644 > index 0000000..28e4a51 > --- /dev/null > +++ b/drivers/gpu/drm/panel/panel-s6e63j0x03.c > @@ -0,0 +1,549 @@ > +/* > + * MIPI-DSI based S6E63J0X03 AMOLED lcd 1.63 inch panel driver. > + * > + * Copyright (c) 2014 Samsung Electronics Co., Ltd > + * > + * Inki Dae, <inki.dae@samsung.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > +*/ > + > +#include <drm/drmP.h> > +#include <drm/drm_mipi_dsi.h> > +#include <drm/drm_panel.h> > + > +#include <linux/of_gpio.h> > +#include <linux/gpio.h> > +#include <linux/regulator/consumer.h> > +#include <linux/backlight.h> > + > +#include <video/mipi_display.h> > +#include <video/of_videomode.h> > +#include <video/videomode.h> > + > +#define READ_ID1 0xDA > +#define READ_ID2 0xDB > +#define READ_ID3 0xDC > + > +#define MCS_LEVEL2_KEY 0xf0 > +#define MCS_MTP_KEY 0xf1 > +#define MCS_MTP_SET3 0xd4 > + > +#define MIN_BRIGHTNESS 0 > +#define MAX_BRIGHTNESS 100 > +#define DEFAULT_BRIGHTNESS 80 > + > +#define GAMMA_LEVEL_NUM 30 > +#define NUM_GAMMA_STEPS 9 > +#define GAMMA_CMD_CNT 28 > + > +struct s6e63j0x03 { > + struct device *dev; > + struct drm_panel panel; > + struct backlight_device *bl_dev; > + > + struct regulator_bulk_data supplies[2]; > + struct gpio_desc *reset_gpio; > + u32 power_on_delay; > + u32 power_off_delay; > + u32 reset_delay; > + u32 init_delay; > + bool flip_horizontal; > + bool flip_vertical; > + struct videomode vm; > + unsigned int width_mm; > + unsigned int height_mm; > +}; > + > +static const unsigned char gamma_tbl[NUM_GAMMA_STEPS][GAMMA_CMD_CNT] = { > + { /* Gamma 10 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x7f, 0x7f, 0x7f, 0x52, 0x6b, 0x6f, 0x26, > + 0x28, 0x2d, 0x28, 0x26, 0x27, 0x33, 0x34, 0x32, 0x36, 0x36, > + 0x35, 0x00, 0xab, 0x00, 0xae, 0x00, 0xbf > + }, > + { /* gamma 30 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x70, 0x7f, 0x7f, 0x4e, 0x64, 0x69, 0x26, > + 0x27, 0x2a, 0x28, 0x29, 0x27, 0x31, 0x32, 0x31, 0x35, 0x34, > + 0x35, 0x00, 0xc4, 0x00, 0xca, 0x00, 0xdc > + }, > + { /* gamma 60 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x65, 0x7b, 0x7d, 0x5f, 0x67, 0x68, 0x2a, > + 0x28, 0x29, 0x28, 0x2a, 0x27, 0x31, 0x2f, 0x30, 0x34, 0x33, > + 0x34, 0x00, 0xd9, 0x00, 0xe4, 0x00, 0xf5 > + }, > + { /* gamma 90 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x4d, 0x6f, 0x71, 0x67, 0x6a, 0x6c, 0x29, > + 0x28, 0x28, 0x28, 0x29, 0x27, 0x30, 0x2e, 0x30, 0x32, 0x31, > + 0x31, 0x00, 0xea, 0x00, 0xf6, 0x01, 0x09 > + }, > + { /* gamma 120 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x3d, 0x66, 0x68, 0x69, 0x69, 0x69, 0x28, > + 0x28, 0x27, 0x28, 0x28, 0x27, 0x30, 0x2e, 0x2f, 0x31, 0x31, > + 0x30, 0x00, 0xf9, 0x01, 0x05, 0x01, 0x1b > + }, > + { /* gamma 150 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x31, 0x51, 0x53, 0x66, 0x66, 0x67, 0x28, > + 0x29, 0x27, 0x28, 0x27, 0x27, 0x2e, 0x2d, 0x2e, 0x31, 0x31, > + 0x30, 0x01, 0x04, 0x01, 0x11, 0x01, 0x29 > + }, > + { /* gamma 200 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x2f, 0x4f, 0x51, 0x67, 0x65, 0x65, 0x29, > + 0x2a, 0x28, 0x27, 0x25, 0x26, 0x2d, 0x2c, 0x2c, 0x30, 0x30, > + 0x30, 0x01, 0x14, 0x01, 0x23, 0x01, 0x3b > + }, > + { /* gamma 240 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x2c, 0x4d, 0x50, 0x65, 0x63, 0x64, 0x2a, > + 0x2c, 0x29, 0x26, 0x24, 0x25, 0x2c, 0x2b, 0x2b, 0x30, 0x30, > + 0x30, 0x01, 0x1e, 0x01, 0x2f, 0x01, 0x47 > + }, > + { /* gamma 300 */ > + MCS_MTP_SET3, > + 0x00, 0x00, 0x00, 0x38, 0x61, 0x64, 0x65, 0x63, 0x64, 0x28, > + 0x2a, 0x27, 0x26, 0x23, 0x25, 0x2b, 0x2b, 0x2a, 0x30, 0x2f, > + 0x30, 0x01, 0x2d, 0x01, 0x3f, 0x01, 0x57 > + } > +}; > + > +static const unsigned char prepare_cmds1[][15] = { > + { 3, 0xf2, 0x1c, 0x28 }, /* porch_adjustment */ > + { 4, 0xb5, 0x00, 0x02, 0x00 }, /* frame_freq */ > + { 5, 0x2a, 0x00, 0x14, 0x01, 0x53 }, /* mem_addr_set_0 */ > + { 5, 0x2b, 0x00, 0x00, 0x01, 0x3f }, /* mem_addr_set_1 */ > + { 14, 0xf8, 0x08, 0x08, 0x08, 0x17, /* ltps_timming_set_0_60hz */ > + 0x00, 0x2a, 0x02, 0x26, > + 0x00, 0x00, 0x02, 0x00, 0x00 }, > + { 2, 0xf7, 0x02 }, /* ltps_timming_set_1 */ > + { 2, 0xb0, 0x01 }, /* param_pos_te_edge */ > + { 2, 0xe2, 0x0f }, /* te_rising_edge */ > + { 2, 0xb0, 0x00 }, /* param_pos_default */ > + { 1, MIPI_DCS_EXIT_SLEEP_MODE }, > +}; > + > +static const unsigned char prepare_cmds2[][4] = { > + { 3, 0xb1, 0x00, 0x09 }, /* elvss_cond */ > + { 2, 0x36, 0x40 }, /* set_pos */ > + { 2, 0x51, 0xff }, /* white_brightness_default */ > + { 2, 0x53, 0x20 }, /* white_ctrl */ > + { 2, 0x55, 0x00 }, /* acl_off */ > + { 1, MIPI_DCS_SET_TEAR_ON }, > +}; > + > + > +static inline struct s6e63j0x03 *panel_to_s6e63j0x03(struct drm_panel *panel) > +{ > + return container_of(panel, struct s6e63j0x03, panel); > +} > + > +static inline ssize_t s6e63j0x03_dcs_write_seq(struct s6e63j0x03 *ctx, > + const u8 *seq, const unsigned char len) > +{ > + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); > + > + return mipi_dsi_dcs_write(dsi, seq, len); > +} > + > +static inline int s6e63j0x03_enable_lv2_command(struct s6e63j0x03 *ctx) > +{ > + unsigned char seq[] = { MCS_LEVEL2_KEY, 0x5a, 0x5a }; > + > + return s6e63j0x03_dcs_write_seq(ctx, seq, ARRAY_SIZE(seq)); > +} > + > +static inline int s6e63j0x03_apply_mtp_key(struct s6e63j0x03 *ctx, bool on) > +{ > + unsigned char seq1[3] = { MCS_MTP_KEY, 0x5a, 0x5a }; > + unsigned char seq2[3] = { MCS_MTP_KEY, 0xa5, 0xa5 }; > + > + return s6e63j0x03_dcs_write_seq(ctx, on ? seq1 : seq2, > + ARRAY_SIZE(seq1)); > +} > + > +static int s6e63j0x03_read_mtp_id(struct s6e63j0x03 *ctx) > +{ > + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); > + unsigned char cmds[3] = { READ_ID1, READ_ID2, READ_ID3 }; > + unsigned char id[3]; > + int ret; > + int i; > + > + for (i = 0; i < 3; i++) { > + ret = mipi_dsi_dcs_read(dsi, cmds[i], &id[i], 1); > + > + if (ret < 0) > + return ret; > + } > + > + dev_info(ctx->dev, "ID: 0x%02x, 0x%02x, 0x%02x\n", id[0], id[1], id[2]); > + > + return 0; > +} > + > +static int s6e63j0x03_power_on(struct s6e63j0x03 *ctx) > +{ > + int ret; > + > + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > + if (ret < 0) > + return ret; > + > + msleep(ctx->power_on_delay); > + > + gpiod_set_value(ctx->reset_gpio, 0); > + usleep_range(1000, 2000); > + gpiod_set_value(ctx->reset_gpio, 1); > + > + usleep_range(ctx->reset_delay * 1000, (ctx->reset_delay + 1) * 1000); > + > + return 0; > +} > + > +static int s6e63j0x03_power_off(struct s6e63j0x03 *ctx) > +{ > + int ret; > + > + gpiod_set_value(ctx->reset_gpio, 0); > + > + ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); > + if (ret < 0) > + return ret; > + > + return 0; > +} > + > +static int s6e63j0x03_get_brightness(struct backlight_device *bl_dev) > +{ > + return bl_dev->props.brightness; > +} > + > +static unsigned int s6e63j0x03_get_brightness_index(unsigned int brightness) > +{ > + unsigned int index; > + > + index = brightness / (MAX_BRIGHTNESS / NUM_GAMMA_STEPS); > + > + if (index >= NUM_GAMMA_STEPS) > + index = NUM_GAMMA_STEPS - 1; > + > + return index; > +} > + > +static int s6e63j0x03_update_gamma(struct s6e63j0x03 *ctx, > + unsigned int brightness) > +{ > + struct backlight_device *bl_dev = ctx->bl_dev; > + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); > + unsigned int index = s6e63j0x03_get_brightness_index(brightness); > + int ret; > + > + ret = s6e63j0x03_apply_mtp_key(ctx, true); > + if (ret < 0) > + return ret; > + > + ret = mipi_dsi_dcs_write(dsi, gamma_tbl[index], GAMMA_CMD_CNT); > + if (ret < 0) > + return ret; > + > + ret = s6e63j0x03_apply_mtp_key(ctx, false); > + if (ret < 0) > + return ret; > + > + bl_dev->props.brightness = brightness; > + > + return 0; > +} > + > +static int s6e63j0x03_set_brightness(struct backlight_device *bl_dev) > +{ > + struct s6e63j0x03 *ctx = (struct s6e63j0x03 *)bl_get_data(bl_dev); > + unsigned int brightness = bl_dev->props.brightness; > + int ret; > + > + if (brightness < MIN_BRIGHTNESS || > + brightness > bl_dev->props.max_brightness) { > + dev_err(ctx->dev, "Invalid brightness: %u\n", brightness); > + return -EINVAL; > + } > + > + if (bl_dev->props.power > FB_BLANK_NORMAL) { > + dev_err(ctx->dev, > + "panel must be at least in fb blank normal state\n"); > + return -EPERM; > + } > + > + ret = s6e63j0x03_update_gamma(ctx, brightness); > + if (ret < 0) > + return ret; > + > + return 0; > +} > + > +static const struct backlight_ops s6e63j0x03_bl_ops = { > + .get_brightness = s6e63j0x03_get_brightness, > + .update_status = s6e63j0x03_set_brightness, > +}; > + > +static int s6e63j0x03_disable(struct drm_panel *panel) > +{ > + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); > + struct backlight_device *bl_dev = ctx->bl_dev; > + u8 seq[] = { MIPI_DCS_SET_DISPLAY_OFF }; > + int ret; > + > + ret = s6e63j0x03_dcs_write_seq(ctx, seq, ARRAY_SIZE(seq)); > + if (ret > 0) > + bl_dev->props.power = FB_BLANK_NORMAL; > + > + return 0; > +} > + > +static int s6e63j0x03_unprepare(struct drm_panel *panel) > +{ > + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); > + struct backlight_device *bl_dev = ctx->bl_dev; > + u8 seq[] = { MIPI_DCS_ENTER_SLEEP_MODE }; > + int ret; > + > + ret = s6e63j0x03_dcs_write_seq(ctx, seq, ARRAY_SIZE(seq)); > + if (ret < 0) > + return ret; > + > + msleep(ctx->power_off_delay); > + > + ret = s6e63j0x03_power_off(ctx); > + if (ret < 0) > + return ret; > + > + bl_dev->props.power = FB_BLANK_POWERDOWN; > + > + return 0; > +} > + > +static int s6e63j0x03_prepare(struct drm_panel *panel) > +{ > + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); > + struct backlight_device *bl_dev = ctx->bl_dev; > + int ret; > + int i; > + > + ret = s6e63j0x03_power_on(ctx); > + if (ret < 0) > + return ret; > + > + ret = s6e63j0x03_enable_lv2_command(ctx); > + if (ret < 0) > + return ret; > + > + ret = s6e63j0x03_apply_mtp_key(ctx, true); > + if (ret < 0) > + return ret; > + > + ret = s6e63j0x03_read_mtp_id(ctx); > + if (ret < 0) > + return ret; > + > + for (i = 0; i < ARRAY_SIZE(prepare_cmds1); i++) { > + ret = s6e63j0x03_dcs_write_seq(ctx, &prepare_cmds1[i][1], > + prepare_cmds1[i][0]); > + if (ret < 0) > + return ret; > + } > + > + msleep(120); > + > + for (i = 0; i < ARRAY_SIZE(prepare_cmds2); i++) { > + ret = s6e63j0x03_dcs_write_seq(ctx, &prepare_cmds2[i][1], > + prepare_cmds2[i][0]); > + if (ret < 0) > + return ret; > + } > + > + ret = s6e63j0x03_apply_mtp_key(ctx, false); > + if (ret < 0) > + return ret; > + > + bl_dev->props.power = FB_BLANK_NORMAL; > + > + return 0; > +} > + > +static int s6e63j0x03_enable(struct drm_panel *panel) > +{ > + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); > + struct backlight_device *bl_dev = ctx->bl_dev; > + u8 seq[] = { MIPI_DCS_SET_DISPLAY_ON }; > + int ret; > + > + ret = s6e63j0x03_dcs_write_seq(ctx, seq, ARRAY_SIZE(seq)); > + if (ret > 0) > + bl_dev->props.power = FB_BLANK_UNBLANK; > + > + return 0; > +} > + > +static int s6e63j0x03_get_modes(struct drm_panel *panel) > +{ > + struct drm_connector *connector = panel->connector; > + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); > + struct drm_display_mode *mode; > + > + mode = drm_mode_create(connector->dev); > + if (!mode) { > + DRM_ERROR("failed to create a new display mode\n"); > + return 0; > + } > + > + drm_display_mode_from_videomode(&ctx->vm, mode); > + mode->width_mm = ctx->width_mm; > + mode->height_mm = ctx->height_mm; > + connector->display_info.width_mm = mode->width_mm; > + connector->display_info.height_mm = mode->height_mm; > + > + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; > + drm_mode_probed_add(connector, mode); > + > + return 1; > +} > + > +static const struct drm_panel_funcs s6e63j0x03_funcs = { > + .disable = s6e63j0x03_disable, > + .unprepare = s6e63j0x03_unprepare, > + .prepare = s6e63j0x03_prepare, > + .enable = s6e63j0x03_enable, > + .get_modes = s6e63j0x03_get_modes, > +}; > + > +static int s6e63j0x03_parse_dt(struct s6e63j0x03 *ctx) > +{ > + struct device *dev = ctx->dev; > + struct device_node *np = dev->of_node; > + int ret; > + > + ret = of_get_videomode(np, &ctx->vm, 0); > + if (ret < 0) > + return ret; > + > + of_property_read_u32(np, "power-on-delay", &ctx->power_on_delay); > + of_property_read_u32(np, "power-off-delay", &ctx->power_off_delay); > + of_property_read_u32(np, "reset-delay", &ctx->reset_delay); > + of_property_read_u32(np, "init-delay", &ctx->init_delay); > + > + ctx->flip_horizontal = of_property_read_bool(np, "flip-horizontal"); > + ctx->flip_vertical = of_property_read_bool(np, "flip-vertical"); > + > + return ret; > +} > + > +static int s6e63j0x03_probe(struct mipi_dsi_device *dsi) > +{ > + struct device *dev = &dsi->dev; > + struct s6e63j0x03 *ctx; > + int ret; > + > + ctx = devm_kzalloc(dev, sizeof(struct s6e63j0x03), GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + mipi_dsi_set_drvdata(dsi, ctx); > + > + ctx->dev = dev; > + > + dsi->lanes = 1; > + dsi->format = MIPI_DSI_FMT_RGB888; > + dsi->mode_flags = MIPI_DSI_MODE_EOT_PACKET | MIPI_DSI_MODE_VIDEO_BURST; > + > + ret = s6e63j0x03_parse_dt(ctx); > + if (ret < 0) > + return ret; > + > + ctx->supplies[0].supply = "vdd3"; > + ctx->supplies[1].supply = "vci"; > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), > + ctx->supplies); > + if (ret < 0) { > + dev_err(dev, "failed to get regulators: %d\n", ret); > + return ret; > + } > + > + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); > + if (IS_ERR(ctx->reset_gpio)) { > + dev_err(dev, "cannot get reset-gpio: %ld\n", > + PTR_ERR(ctx->reset_gpio)); > + return PTR_ERR(ctx->reset_gpio); > + } > + > + drm_panel_init(&ctx->panel); > + ctx->panel.dev = dev; > + ctx->panel.funcs = &s6e63j0x03_funcs; > + > + ctx->bl_dev = backlight_device_register("s6e63j0x03", dev, ctx, > + &s6e63j0x03_bl_ops, NULL); > + if (IS_ERR(ctx->bl_dev)) { > + dev_err(dev, "failed to register backlight device\n"); > + return PTR_ERR(ctx->bl_dev); > + } > + > + ctx->bl_dev->props.max_brightness = MAX_BRIGHTNESS; > + ctx->bl_dev->props.brightness = DEFAULT_BRIGHTNESS; > + ctx->bl_dev->props.power = FB_BLANK_POWERDOWN; > + > + > + ret = drm_panel_add(&ctx->panel); > + if (ret < 0) > + goto unregister_backlight; > + > + ret = mipi_dsi_attach(dsi); > + if (ret < 0) > + goto remove_panel; > + > + return ret; > + > +remove_panel: > + drm_panel_remove(&ctx->panel); > + > +unregister_backlight: > + backlight_device_unregister(ctx->bl_dev); > + > + return ret; > +} > + > +static int s6e63j0x03_remove(struct mipi_dsi_device *dsi) > +{ > + struct s6e63j0x03 *ctx = mipi_dsi_get_drvdata(dsi); > + > + mipi_dsi_detach(dsi); > + drm_panel_remove(&ctx->panel); > + > + backlight_device_unregister(ctx->bl_dev); > + > + return 0; > +} > + > +static const struct of_device_id s6e63j0x03_of_match[] = { > + { .compatible = "samsung,s6e63j0x03" }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, s6e63j0x03_of_match); > + > +static struct mipi_dsi_driver s6e63j0x03_driver = { > + .probe = s6e63j0x03_probe, > + .remove = s6e63j0x03_remove, > + .driver = { > + .name = "panel_s6e63j0x03", > + .of_match_table = s6e63j0x03_of_match, > + }, > +}; > +module_mipi_dsi_driver(s6e63j0x03_driver); > + > +MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); > +MODULE_DESCRIPTION("MIPI-DSI based s6e8aa0 AMOLED LCD Panel Driver"); > +MODULE_LICENSE("GPL v2"); >
On Wed, Dec 31, 2014 at 07:41:43PM +0900, Inki Dae wrote: > Hi Thierry, > > Ping~. > > Or is it ok to pick up this patch to my tree, exynos-drm-next? It > doesn't seem to care for a long time. I don't seem to have a copy of the v2 2/3 patch. All I found in my inbox is the v2 0/3 cover-letter. Please resend with me in Cc so that I can properly review (and apply) the patch. Thierry
On 2015? 01? 05? 23:19, Thierry Reding wrote: > On Wed, Dec 31, 2014 at 07:41:43PM +0900, Inki Dae wrote: >> Hi Thierry, >> >> Ping~. >> >> Or is it ok to pick up this patch to my tree, exynos-drm-next? It >> doesn't seem to care for a long time. > > I don't seem to have a copy of the v2 2/3 patch. All I found in my inbox > is the v2 0/3 cover-letter. Please resend with me in Cc so that I can > properly review (and apply) the patch. Please, refer to below link, http://lists.freedesktop.org/archives/dri-devel/2014-December/073666.html We already sent it with you in Cc. Anyway, I will resend it. Thanks, Inki Dae > > Thierry >
Dear all, On Tue, 06 Jan 2015 00:21:22 +0900 Inki Dae <inki.dae@samsung.com> wrote: > On 2015? 01? 05? 23:19, Thierry Reding wrote: > > On Wed, Dec 31, 2014 at 07:41:43PM +0900, Inki Dae wrote: > >> Hi Thierry, > >> > >> Ping~. > >> > >> Or is it ok to pick up this patch to my tree, exynos-drm-next? It > >> doesn't seem to care for a long time. > > > > I don't seem to have a copy of the v2 2/3 patch. All I found in my > > inbox is the v2 0/3 cover-letter. Please resend with me in Cc so > > that I can properly review (and apply) the patch. > > Please, refer to below link, > http://lists.freedesktop.org/archives/dri-devel/2014-December/073666.html > > We already sent it with you in Cc. Anyway, I will resend it. > Also you can find the whole patchset from [1/3] https://patchwork.kernel.org/patch/5461421/ [2/3] https://patchwork.kernel.org/patch/5461431/ [3/3] https://patchwork.kernel.org/patch/5461441/ > Thanks, > Inki Dae > > > > > Thierry > > > Best regards, Hyungwon Hwang
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index bee9f72..bc133e2 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -27,4 +27,10 @@ config DRM_PANEL_S6E8AA0 select DRM_MIPI_DSI select VIDEOMODE_HELPERS +config DRM_PANEL_S6E63J0X03 + tristate "S6E63J0X03 DSI video mode panel" + depends on OF + select DRM_MIPI_DSI + select VIDEOMODE_HELPERS + endmenu diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 8b92921..7f36dc2 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o obj-$(CONFIG_DRM_PANEL_LD9040) += panel-ld9040.o obj-$(CONFIG_DRM_PANEL_S6E8AA0) += panel-s6e8aa0.o +obj-$(CONFIG_DRM_PANEL_S6E63J0X03) += panel-s6e63j0x03.o diff --git a/drivers/gpu/drm/panel/panel-s6e63j0x03.c b/drivers/gpu/drm/panel/panel-s6e63j0x03.c new file mode 100644 index 0000000..28e4a51 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-s6e63j0x03.c @@ -0,0 +1,549 @@ +/* + * MIPI-DSI based S6E63J0X03 AMOLED lcd 1.63 inch panel driver. + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd + * + * Inki Dae, <inki.dae@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <drm/drmP.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_panel.h> + +#include <linux/of_gpio.h> +#include <linux/gpio.h> +#include <linux/regulator/consumer.h> +#include <linux/backlight.h> + +#include <video/mipi_display.h> +#include <video/of_videomode.h> +#include <video/videomode.h> + +#define READ_ID1 0xDA +#define READ_ID2 0xDB +#define READ_ID3 0xDC + +#define MCS_LEVEL2_KEY 0xf0 +#define MCS_MTP_KEY 0xf1 +#define MCS_MTP_SET3 0xd4 + +#define MIN_BRIGHTNESS 0 +#define MAX_BRIGHTNESS 100 +#define DEFAULT_BRIGHTNESS 80 + +#define GAMMA_LEVEL_NUM 30 +#define NUM_GAMMA_STEPS 9 +#define GAMMA_CMD_CNT 28 + +struct s6e63j0x03 { + struct device *dev; + struct drm_panel panel; + struct backlight_device *bl_dev; + + struct regulator_bulk_data supplies[2]; + struct gpio_desc *reset_gpio; + u32 power_on_delay; + u32 power_off_delay; + u32 reset_delay; + u32 init_delay; + bool flip_horizontal; + bool flip_vertical; + struct videomode vm; + unsigned int width_mm; + unsigned int height_mm; +}; + +static const unsigned char gamma_tbl[NUM_GAMMA_STEPS][GAMMA_CMD_CNT] = { + { /* Gamma 10 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x7f, 0x7f, 0x7f, 0x52, 0x6b, 0x6f, 0x26, + 0x28, 0x2d, 0x28, 0x26, 0x27, 0x33, 0x34, 0x32, 0x36, 0x36, + 0x35, 0x00, 0xab, 0x00, 0xae, 0x00, 0xbf + }, + { /* gamma 30 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x70, 0x7f, 0x7f, 0x4e, 0x64, 0x69, 0x26, + 0x27, 0x2a, 0x28, 0x29, 0x27, 0x31, 0x32, 0x31, 0x35, 0x34, + 0x35, 0x00, 0xc4, 0x00, 0xca, 0x00, 0xdc + }, + { /* gamma 60 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x65, 0x7b, 0x7d, 0x5f, 0x67, 0x68, 0x2a, + 0x28, 0x29, 0x28, 0x2a, 0x27, 0x31, 0x2f, 0x30, 0x34, 0x33, + 0x34, 0x00, 0xd9, 0x00, 0xe4, 0x00, 0xf5 + }, + { /* gamma 90 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x4d, 0x6f, 0x71, 0x67, 0x6a, 0x6c, 0x29, + 0x28, 0x28, 0x28, 0x29, 0x27, 0x30, 0x2e, 0x30, 0x32, 0x31, + 0x31, 0x00, 0xea, 0x00, 0xf6, 0x01, 0x09 + }, + { /* gamma 120 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x3d, 0x66, 0x68, 0x69, 0x69, 0x69, 0x28, + 0x28, 0x27, 0x28, 0x28, 0x27, 0x30, 0x2e, 0x2f, 0x31, 0x31, + 0x30, 0x00, 0xf9, 0x01, 0x05, 0x01, 0x1b + }, + { /* gamma 150 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x31, 0x51, 0x53, 0x66, 0x66, 0x67, 0x28, + 0x29, 0x27, 0x28, 0x27, 0x27, 0x2e, 0x2d, 0x2e, 0x31, 0x31, + 0x30, 0x01, 0x04, 0x01, 0x11, 0x01, 0x29 + }, + { /* gamma 200 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x2f, 0x4f, 0x51, 0x67, 0x65, 0x65, 0x29, + 0x2a, 0x28, 0x27, 0x25, 0x26, 0x2d, 0x2c, 0x2c, 0x30, 0x30, + 0x30, 0x01, 0x14, 0x01, 0x23, 0x01, 0x3b + }, + { /* gamma 240 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x2c, 0x4d, 0x50, 0x65, 0x63, 0x64, 0x2a, + 0x2c, 0x29, 0x26, 0x24, 0x25, 0x2c, 0x2b, 0x2b, 0x30, 0x30, + 0x30, 0x01, 0x1e, 0x01, 0x2f, 0x01, 0x47 + }, + { /* gamma 300 */ + MCS_MTP_SET3, + 0x00, 0x00, 0x00, 0x38, 0x61, 0x64, 0x65, 0x63, 0x64, 0x28, + 0x2a, 0x27, 0x26, 0x23, 0x25, 0x2b, 0x2b, 0x2a, 0x30, 0x2f, + 0x30, 0x01, 0x2d, 0x01, 0x3f, 0x01, 0x57 + } +}; + +static const unsigned char prepare_cmds1[][15] = { + { 3, 0xf2, 0x1c, 0x28 }, /* porch_adjustment */ + { 4, 0xb5, 0x00, 0x02, 0x00 }, /* frame_freq */ + { 5, 0x2a, 0x00, 0x14, 0x01, 0x53 }, /* mem_addr_set_0 */ + { 5, 0x2b, 0x00, 0x00, 0x01, 0x3f }, /* mem_addr_set_1 */ + { 14, 0xf8, 0x08, 0x08, 0x08, 0x17, /* ltps_timming_set_0_60hz */ + 0x00, 0x2a, 0x02, 0x26, + 0x00, 0x00, 0x02, 0x00, 0x00 }, + { 2, 0xf7, 0x02 }, /* ltps_timming_set_1 */ + { 2, 0xb0, 0x01 }, /* param_pos_te_edge */ + { 2, 0xe2, 0x0f }, /* te_rising_edge */ + { 2, 0xb0, 0x00 }, /* param_pos_default */ + { 1, MIPI_DCS_EXIT_SLEEP_MODE }, +}; + +static const unsigned char prepare_cmds2[][4] = { + { 3, 0xb1, 0x00, 0x09 }, /* elvss_cond */ + { 2, 0x36, 0x40 }, /* set_pos */ + { 2, 0x51, 0xff }, /* white_brightness_default */ + { 2, 0x53, 0x20 }, /* white_ctrl */ + { 2, 0x55, 0x00 }, /* acl_off */ + { 1, MIPI_DCS_SET_TEAR_ON }, +}; + + +static inline struct s6e63j0x03 *panel_to_s6e63j0x03(struct drm_panel *panel) +{ + return container_of(panel, struct s6e63j0x03, panel); +} + +static inline ssize_t s6e63j0x03_dcs_write_seq(struct s6e63j0x03 *ctx, + const u8 *seq, const unsigned char len) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + + return mipi_dsi_dcs_write(dsi, seq, len); +} + +static inline int s6e63j0x03_enable_lv2_command(struct s6e63j0x03 *ctx) +{ + unsigned char seq[] = { MCS_LEVEL2_KEY, 0x5a, 0x5a }; + + return s6e63j0x03_dcs_write_seq(ctx, seq, ARRAY_SIZE(seq)); +} + +static inline int s6e63j0x03_apply_mtp_key(struct s6e63j0x03 *ctx, bool on) +{ + unsigned char seq1[3] = { MCS_MTP_KEY, 0x5a, 0x5a }; + unsigned char seq2[3] = { MCS_MTP_KEY, 0xa5, 0xa5 }; + + return s6e63j0x03_dcs_write_seq(ctx, on ? seq1 : seq2, + ARRAY_SIZE(seq1)); +} + +static int s6e63j0x03_read_mtp_id(struct s6e63j0x03 *ctx) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + unsigned char cmds[3] = { READ_ID1, READ_ID2, READ_ID3 }; + unsigned char id[3]; + int ret; + int i; + + for (i = 0; i < 3; i++) { + ret = mipi_dsi_dcs_read(dsi, cmds[i], &id[i], 1); + + if (ret < 0) + return ret; + } + + dev_info(ctx->dev, "ID: 0x%02x, 0x%02x, 0x%02x\n", id[0], id[1], id[2]); + + return 0; +} + +static int s6e63j0x03_power_on(struct s6e63j0x03 *ctx) +{ + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + if (ret < 0) + return ret; + + msleep(ctx->power_on_delay); + + gpiod_set_value(ctx->reset_gpio, 0); + usleep_range(1000, 2000); + gpiod_set_value(ctx->reset_gpio, 1); + + usleep_range(ctx->reset_delay * 1000, (ctx->reset_delay + 1) * 1000); + + return 0; +} + +static int s6e63j0x03_power_off(struct s6e63j0x03 *ctx) +{ + int ret; + + gpiod_set_value(ctx->reset_gpio, 0); + + ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + if (ret < 0) + return ret; + + return 0; +} + +static int s6e63j0x03_get_brightness(struct backlight_device *bl_dev) +{ + return bl_dev->props.brightness; +} + +static unsigned int s6e63j0x03_get_brightness_index(unsigned int brightness) +{ + unsigned int index; + + index = brightness / (MAX_BRIGHTNESS / NUM_GAMMA_STEPS); + + if (index >= NUM_GAMMA_STEPS) + index = NUM_GAMMA_STEPS - 1; + + return index; +} + +static int s6e63j0x03_update_gamma(struct s6e63j0x03 *ctx, + unsigned int brightness) +{ + struct backlight_device *bl_dev = ctx->bl_dev; + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + unsigned int index = s6e63j0x03_get_brightness_index(brightness); + int ret; + + ret = s6e63j0x03_apply_mtp_key(ctx, true); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_write(dsi, gamma_tbl[index], GAMMA_CMD_CNT); + if (ret < 0) + return ret; + + ret = s6e63j0x03_apply_mtp_key(ctx, false); + if (ret < 0) + return ret; + + bl_dev->props.brightness = brightness; + + return 0; +} + +static int s6e63j0x03_set_brightness(struct backlight_device *bl_dev) +{ + struct s6e63j0x03 *ctx = (struct s6e63j0x03 *)bl_get_data(bl_dev); + unsigned int brightness = bl_dev->props.brightness; + int ret; + + if (brightness < MIN_BRIGHTNESS || + brightness > bl_dev->props.max_brightness) { + dev_err(ctx->dev, "Invalid brightness: %u\n", brightness); + return -EINVAL; + } + + if (bl_dev->props.power > FB_BLANK_NORMAL) { + dev_err(ctx->dev, + "panel must be at least in fb blank normal state\n"); + return -EPERM; + } + + ret = s6e63j0x03_update_gamma(ctx, brightness); + if (ret < 0) + return ret; + + return 0; +} + +static const struct backlight_ops s6e63j0x03_bl_ops = { + .get_brightness = s6e63j0x03_get_brightness, + .update_status = s6e63j0x03_set_brightness, +}; + +static int s6e63j0x03_disable(struct drm_panel *panel) +{ + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); + struct backlight_device *bl_dev = ctx->bl_dev; + u8 seq[] = { MIPI_DCS_SET_DISPLAY_OFF }; + int ret; + + ret = s6e63j0x03_dcs_write_seq(ctx, seq, ARRAY_SIZE(seq)); + if (ret > 0) + bl_dev->props.power = FB_BLANK_NORMAL; + + return 0; +} + +static int s6e63j0x03_unprepare(struct drm_panel *panel) +{ + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); + struct backlight_device *bl_dev = ctx->bl_dev; + u8 seq[] = { MIPI_DCS_ENTER_SLEEP_MODE }; + int ret; + + ret = s6e63j0x03_dcs_write_seq(ctx, seq, ARRAY_SIZE(seq)); + if (ret < 0) + return ret; + + msleep(ctx->power_off_delay); + + ret = s6e63j0x03_power_off(ctx); + if (ret < 0) + return ret; + + bl_dev->props.power = FB_BLANK_POWERDOWN; + + return 0; +} + +static int s6e63j0x03_prepare(struct drm_panel *panel) +{ + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); + struct backlight_device *bl_dev = ctx->bl_dev; + int ret; + int i; + + ret = s6e63j0x03_power_on(ctx); + if (ret < 0) + return ret; + + ret = s6e63j0x03_enable_lv2_command(ctx); + if (ret < 0) + return ret; + + ret = s6e63j0x03_apply_mtp_key(ctx, true); + if (ret < 0) + return ret; + + ret = s6e63j0x03_read_mtp_id(ctx); + if (ret < 0) + return ret; + + for (i = 0; i < ARRAY_SIZE(prepare_cmds1); i++) { + ret = s6e63j0x03_dcs_write_seq(ctx, &prepare_cmds1[i][1], + prepare_cmds1[i][0]); + if (ret < 0) + return ret; + } + + msleep(120); + + for (i = 0; i < ARRAY_SIZE(prepare_cmds2); i++) { + ret = s6e63j0x03_dcs_write_seq(ctx, &prepare_cmds2[i][1], + prepare_cmds2[i][0]); + if (ret < 0) + return ret; + } + + ret = s6e63j0x03_apply_mtp_key(ctx, false); + if (ret < 0) + return ret; + + bl_dev->props.power = FB_BLANK_NORMAL; + + return 0; +} + +static int s6e63j0x03_enable(struct drm_panel *panel) +{ + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); + struct backlight_device *bl_dev = ctx->bl_dev; + u8 seq[] = { MIPI_DCS_SET_DISPLAY_ON }; + int ret; + + ret = s6e63j0x03_dcs_write_seq(ctx, seq, ARRAY_SIZE(seq)); + if (ret > 0) + bl_dev->props.power = FB_BLANK_UNBLANK; + + return 0; +} + +static int s6e63j0x03_get_modes(struct drm_panel *panel) +{ + struct drm_connector *connector = panel->connector; + struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel); + struct drm_display_mode *mode; + + mode = drm_mode_create(connector->dev); + if (!mode) { + DRM_ERROR("failed to create a new display mode\n"); + return 0; + } + + drm_display_mode_from_videomode(&ctx->vm, mode); + mode->width_mm = ctx->width_mm; + mode->height_mm = ctx->height_mm; + connector->display_info.width_mm = mode->width_mm; + connector->display_info.height_mm = mode->height_mm; + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + drm_mode_probed_add(connector, mode); + + return 1; +} + +static const struct drm_panel_funcs s6e63j0x03_funcs = { + .disable = s6e63j0x03_disable, + .unprepare = s6e63j0x03_unprepare, + .prepare = s6e63j0x03_prepare, + .enable = s6e63j0x03_enable, + .get_modes = s6e63j0x03_get_modes, +}; + +static int s6e63j0x03_parse_dt(struct s6e63j0x03 *ctx) +{ + struct device *dev = ctx->dev; + struct device_node *np = dev->of_node; + int ret; + + ret = of_get_videomode(np, &ctx->vm, 0); + if (ret < 0) + return ret; + + of_property_read_u32(np, "power-on-delay", &ctx->power_on_delay); + of_property_read_u32(np, "power-off-delay", &ctx->power_off_delay); + of_property_read_u32(np, "reset-delay", &ctx->reset_delay); + of_property_read_u32(np, "init-delay", &ctx->init_delay); + + ctx->flip_horizontal = of_property_read_bool(np, "flip-horizontal"); + ctx->flip_vertical = of_property_read_bool(np, "flip-vertical"); + + return ret; +} + +static int s6e63j0x03_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct s6e63j0x03 *ctx; + int ret; + + ctx = devm_kzalloc(dev, sizeof(struct s6e63j0x03), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + mipi_dsi_set_drvdata(dsi, ctx); + + ctx->dev = dev; + + dsi->lanes = 1; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_EOT_PACKET | MIPI_DSI_MODE_VIDEO_BURST; + + ret = s6e63j0x03_parse_dt(ctx); + if (ret < 0) + return ret; + + ctx->supplies[0].supply = "vdd3"; + ctx->supplies[1].supply = "vci"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), + ctx->supplies); + if (ret < 0) { + dev_err(dev, "failed to get regulators: %d\n", ret); + return ret; + } + + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(ctx->reset_gpio)) { + dev_err(dev, "cannot get reset-gpio: %ld\n", + PTR_ERR(ctx->reset_gpio)); + return PTR_ERR(ctx->reset_gpio); + } + + drm_panel_init(&ctx->panel); + ctx->panel.dev = dev; + ctx->panel.funcs = &s6e63j0x03_funcs; + + ctx->bl_dev = backlight_device_register("s6e63j0x03", dev, ctx, + &s6e63j0x03_bl_ops, NULL); + if (IS_ERR(ctx->bl_dev)) { + dev_err(dev, "failed to register backlight device\n"); + return PTR_ERR(ctx->bl_dev); + } + + ctx->bl_dev->props.max_brightness = MAX_BRIGHTNESS; + ctx->bl_dev->props.brightness = DEFAULT_BRIGHTNESS; + ctx->bl_dev->props.power = FB_BLANK_POWERDOWN; + + + ret = drm_panel_add(&ctx->panel); + if (ret < 0) + goto unregister_backlight; + + ret = mipi_dsi_attach(dsi); + if (ret < 0) + goto remove_panel; + + return ret; + +remove_panel: + drm_panel_remove(&ctx->panel); + +unregister_backlight: + backlight_device_unregister(ctx->bl_dev); + + return ret; +} + +static int s6e63j0x03_remove(struct mipi_dsi_device *dsi) +{ + struct s6e63j0x03 *ctx = mipi_dsi_get_drvdata(dsi); + + mipi_dsi_detach(dsi); + drm_panel_remove(&ctx->panel); + + backlight_device_unregister(ctx->bl_dev); + + return 0; +} + +static const struct of_device_id s6e63j0x03_of_match[] = { + { .compatible = "samsung,s6e63j0x03" }, + { } +}; +MODULE_DEVICE_TABLE(of, s6e63j0x03_of_match); + +static struct mipi_dsi_driver s6e63j0x03_driver = { + .probe = s6e63j0x03_probe, + .remove = s6e63j0x03_remove, + .driver = { + .name = "panel_s6e63j0x03", + .of_match_table = s6e63j0x03_of_match, + }, +}; +module_mipi_dsi_driver(s6e63j0x03_driver); + +MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); +MODULE_DESCRIPTION("MIPI-DSI based s6e8aa0 AMOLED LCD Panel Driver"); +MODULE_LICENSE("GPL v2");