From e2945e6c5111726536c6046eaa1b840636e066a8 Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Tue, 14 Mar 2023 08:17:24 -0300 Subject: [PATCH] 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 Reviewed-by: Neil Armstrong Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20230314111724.1520178-2-festevam@denx.de --- drivers/gpu/drm/panel/panel-seiko-43wvf1g.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) 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 +#include #include #include #include @@ -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); -- 2.20.1