diff options
| author | Fabio Estevam <festevam@denx.de> | 2023-03-14 14:17:24 +0300 |
|---|---|---|
| committer | Neil Armstrong <neil.armstrong@linaro.org> | 2023-03-15 12:11:27 +0300 |
| commit | e2945e6c5111726536c6046eaa1b840636e066a8 (patch) | |
| tree | 46169a918d9b812f5c0f8b3459284a438ddd5933 /drivers/gpu/drm | |
| parent | 1afdbd475adc609d829e560389d33eb90501660f (diff) | |
| download | linux-e2945e6c5111726536c6046eaa1b840636e066a8.tar.xz | |
drm/panel: seiko-43wvf1g: Add the 'enable-gpios' property
Sometimes a GPIO is needed to turn on/off the display.
Add support for this usecase by introducing the optional 'enable-gpios'
property.
Tested on a imx53qsb board.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230314111724.1520178-2-festevam@denx.de
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-seiko-43wvf1g.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c b/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c index 76160e5d43bd..c250ca36a5b3 100644 --- a/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c +++ b/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c @@ -7,6 +7,7 @@ */ #include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <linux/media-bus-format.h> #include <linux/module.h> #include <linux/of.h> @@ -48,6 +49,7 @@ struct seiko_panel { const struct seiko_panel_desc *desc; struct regulator *dvdd; struct regulator *avdd; + struct gpio_desc *enable_gpio; }; static inline struct seiko_panel *to_seiko_panel(struct drm_panel *panel) @@ -139,6 +141,8 @@ static int seiko_panel_unprepare(struct drm_panel *panel) if (!p->prepared) return 0; + gpiod_set_value_cansleep(p->enable_gpio, 0); + regulator_disable(p->avdd); /* Add a 100ms delay as per the panel datasheet */ @@ -174,6 +178,8 @@ static int seiko_panel_prepare(struct drm_panel *panel) goto disable_dvdd; } + gpiod_set_value_cansleep(p->enable_gpio, 1); + p->prepared = true; return 0; @@ -252,6 +258,12 @@ static int seiko_panel_probe(struct device *dev, if (IS_ERR(panel->avdd)) return PTR_ERR(panel->avdd); + panel->enable_gpio = devm_gpiod_get_optional(dev, "enable", + GPIOD_OUT_LOW); + if (IS_ERR(panel->enable_gpio)) + return dev_err_probe(dev, PTR_ERR(panel->enable_gpio), + "failed to request GPIO\n"); + drm_panel_init(&panel->base, dev, &seiko_panel_funcs, DRM_MODE_CONNECTOR_DPI); |