diff options
| author | Paul Cercueil <paul@crapouillou.net> | 2023-07-08 10:40:26 +0200 |
|---|---|---|
| committer | Paul Cercueil <paul@crapouillou.net> | 2023-07-14 10:12:06 +0200 |
| commit | c2268daa65fb415cfd463016ad54c20afef8f75e (patch) | |
| tree | 6c2541a0b1aa5f0181ad9a357037f606e2a26b5f /drivers/gpu/drm/panel/panel-samsung-ld9040.c | |
| parent | 50f600fd6b89af9f14248491090180b111e5e5f7 (diff) | |
drm/panel: ld9040: Register a backlight device
Register a backlight device to be able to switch between all the gamma
levels.
v2: Remove .get_brightness() callback, use bl_get_data() and
backlight_get_brightness()
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230708084027.18352-3-paul@crapouillou.net
Diffstat (limited to 'drivers/gpu/drm/panel/panel-samsung-ld9040.c')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-samsung-ld9040.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/gpu/drm/panel/panel-samsung-ld9040.c b/drivers/gpu/drm/panel/panel-samsung-ld9040.c index f39f999c21af..9f438683a6f6 100644 --- a/drivers/gpu/drm/panel/panel-samsung-ld9040.c +++ b/drivers/gpu/drm/panel/panel-samsung-ld9040.c @@ -8,6 +8,7 @@ * Andrzej Hajda <a.hajda@samsung.com> */ +#include <linux/backlight.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/module.h> @@ -310,8 +311,30 @@ static int ld9040_parse_dt(struct ld9040 *ctx) return 0; } +static int ld9040_bl_update_status(struct backlight_device *dev) +{ + struct ld9040 *ctx = bl_get_data(dev); + + ctx->brightness = backlight_get_brightness(dev); + ld9040_brightness_set(ctx); + + return 0; +} + +static const struct backlight_ops ld9040_bl_ops = { + .update_status = ld9040_bl_update_status, +}; + +static const struct backlight_properties ld9040_bl_props = { + .type = BACKLIGHT_RAW, + .scale = BACKLIGHT_SCALE_NON_LINEAR, + .max_brightness = ARRAY_SIZE(ld9040_gammas) - 1, + .brightness = ARRAY_SIZE(ld9040_gammas) - 1, +}; + static int ld9040_probe(struct spi_device *spi) { + struct backlight_device *bldev; struct device *dev = &spi->dev; struct ld9040 *ctx; int ret; @@ -323,7 +346,7 @@ static int ld9040_probe(struct spi_device *spi) spi_set_drvdata(spi, ctx); ctx->dev = dev; - ctx->brightness = ARRAY_SIZE(ld9040_gammas) - 1; + ctx->brightness = ld9040_bl_props.brightness; ret = ld9040_parse_dt(ctx); if (ret < 0) @@ -353,6 +376,12 @@ static int ld9040_probe(struct spi_device *spi) drm_panel_init(&ctx->panel, dev, &ld9040_drm_funcs, DRM_MODE_CONNECTOR_DPI); + bldev = devm_backlight_device_register(dev, dev_name(dev), dev, + ctx, &ld9040_bl_ops, + &ld9040_bl_props); + if (IS_ERR(bldev)) + return PTR_ERR(bldev); + drm_panel_add(&ctx->panel); return 0; |