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| author | Wolfgang Wiedmeyer <wolfgit@wiedmeyer.de> | 2016-09-16 15:19:18 +0200 |
|---|---|---|
| committer | Wolfgang Wiedmeyer <wolfgit@wiedmeyer.de> | 2016-09-27 02:50:40 +0200 |
| commit | bbcae9f0766564b228cefdf463317bb5222aeba0 (patch) | |
| tree | db98271b8985fcbb3038a64a459da08b40d244f5 | |
| parent | 31eb187e5b67efd4c09cacd07e39d30892ee3c19 (diff) | |
| download | kernel_i9300_mainline-bbcae9f0766564b228cefdf463317bb5222aeba0.zip kernel_i9300_mainline-bbcae9f0766564b228cefdf463317bb5222aeba0.tar.gz kernel_i9300_mainline-bbcae9f0766564b228cefdf463317bb5222aeba0.tar.bz2 | |
drm/panel/s6e8aa0: add backlight support
The patch adds backlight support to s6e8aa0 panel.
This is an updated patch and was originally written by
Andrzej Hajda <a.hajda@samsung.com> and submitted here:
https://patchwork.kernel.org/patch/4264151/
Signed-off-by: Wolfgang Wiedmeyer <wolfgit@wiedmeyer.de>
| -rw-r--r-- | drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c b/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c index a188a39..a23744c 100644 --- a/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c +++ b/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c @@ -22,6 +22,7 @@ #include <linux/gpio/consumer.h> #include <linux/regulator/consumer.h> +#include <linux/backlight.h> #include <video/mipi_display.h> #include <video/of_videomode.h> #include <video/videomode.h> @@ -91,6 +92,8 @@ struct s6e8aa0_variant { const s6e8aa0_gamma_table *gamma_tables; }; +#define S6E8AA0_STATE_BIT_ENABLED 0 + struct s6e8aa0 { struct device *dev; struct drm_panel panel; @@ -106,6 +109,7 @@ struct s6e8aa0 { u32 width_mm; u32 height_mm; + unsigned long state; u8 version; u8 id; const struct s6e8aa0_variant *variant; @@ -887,6 +891,7 @@ static int s6e8aa0_unprepare(struct drm_panel *panel) { struct s6e8aa0 *ctx = panel_to_s6e8aa0(panel); + clear_bit(S6E8AA0_STATE_BIT_ENABLED, &ctx->state); s6e8aa0_dcs_write_seq_static(ctx, MIPI_DCS_ENTER_SLEEP_MODE); s6e8aa0_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_OFF); msleep(40); @@ -910,6 +915,8 @@ static int s6e8aa0_prepare(struct drm_panel *panel) if (ret < 0) s6e8aa0_unprepare(panel); + else + set_bit(S6E8AA0_STATE_BIT_ENABLED, &ctx->state); return ret; } @@ -951,6 +958,47 @@ static const struct drm_panel_funcs s6e8aa0_drm_funcs = { .get_modes = s6e8aa0_get_modes, }; +static int s6e8aa0_get_brightness(struct backlight_device *bd) +{ + return bd->props.brightness; +} + +static int s6e8aa0_set_brightness(struct backlight_device *bd) +{ + struct s6e8aa0 *ctx = bl_get_data(bd); + + bd->props.power = FB_BLANK_UNBLANK; + if (ctx->brightness != bd->props.brightness) { + ctx->brightness = bd->props.brightness; + if (test_bit(S6E8AA0_STATE_BIT_ENABLED, &ctx->state)) + s6e8aa0_brightness_set(ctx); + } + + return s6e8aa0_clear_error(ctx); +} + +static const struct backlight_ops s6e8aa0_backlight_ops = { + .get_brightness = s6e8aa0_get_brightness, + .update_status = s6e8aa0_set_brightness, +}; + +static void s6e8aa0_backlight_register(struct s6e8aa0 *ctx) +{ + struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = ctx->brightness, + .max_brightness = GAMMA_LEVEL_NUM - 1 + }; + struct device *dev = ctx->dev; + struct backlight_device *bd; + + bd = devm_backlight_device_register(dev, "panel", dev, ctx, + &s6e8aa0_backlight_ops, &props); + if (IS_ERR(bd)) + dev_err(dev, "error registering backlight device (%ld)\n", + PTR_ERR(bd)); +} + static int s6e8aa0_parse_dt(struct s6e8aa0 *ctx) { struct device *dev = ctx->dev; @@ -1028,6 +1076,8 @@ static int s6e8aa0_probe(struct mipi_dsi_device *dsi) if (ret < 0) drm_panel_remove(&ctx->panel); + s6e8aa0_backlight_register(ctx); + return ret; } |