Some displays have a reset input and/or need a regulator to function properly. Allow to specify them for panel-dpi devices.

Acked-by: Rob Herring robh@kernel.org Reviewed-by: Tomi Valkeinen tomi.valkeinen@ti.com Signed-off-by: Uwe Kleine-König u.kleine-koenig@pengutronix.de --- Documentation/devicetree/bindings/display/panel/panel-dpi.txt | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-dpi.txt b/Documentation/devicetree/bindings/display/panel/panel-dpi.txt index 216c894d4f99..b52ac52757df 100644 --- a/Documentation/devicetree/bindings/display/panel/panel-dpi.txt +++ b/Documentation/devicetree/bindings/display/panel/panel-dpi.txt @@ -7,6 +7,8 @@ Required properties: Optional properties: - label: a symbolic name for the panel - enable-gpios: panel enable gpio +- reset-gpios: GPIO to control the RESET pin +- vcc-supply: phandle of regulator that will be used to enable power to the display

Required nodes: - "panel-timing" containing video timings

To allow supporting displays that need some logic to enable power to the display try to get a vcc-supply property from the device tree and drive the resulting regulator accordingly.

Reviewed-by: Tomi Valkeinen tomi.valkeinen@ti.com Signed-off-by: Uwe Kleine-König u.kleine-koenig@pengutronix.de --- drivers/gpu/drm/omapdrm/displays/panel-dpi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dpi.c b/drivers/gpu/drm/omapdrm/displays/panel-dpi.c index 201a1c1a6f42..8c3f31ebff00 100644 --- a/drivers/gpu/drm/omapdrm/displays/panel-dpi.c +++ b/drivers/gpu/drm/omapdrm/displays/panel-dpi.c @@ -15,6 +15,7 @@ #include <linux/slab.h> #include <linux/of.h> #include <linux/of_gpio.h> +#include <linux/regulator/consumer.h>

#include <video/omapdss.h> #include <video/omap-panel-data.h> @@ -32,6 +33,7 @@ struct panel_drv_data { int backlight_gpio;

struct gpio_desc *enable_gpio; + struct regulator *vcc_supply; };

#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) @@ -83,6 +85,12 @@ static int panel_dpi_enable(struct omap_dss_device *dssdev) if (r) return r;

+ r = regulator_enable(ddata->vcc_supply); + if (r) { + in->ops.dpi->disable(in); + return r; + } + gpiod_set_value_cansleep(ddata->enable_gpio, 1);

if (gpio_is_valid(ddata->backlight_gpio)) @@ -105,6 +113,7 @@ static void panel_dpi_disable(struct omap_dss_device *dssdev) gpio_set_value_cansleep(ddata->backlight_gpio, 0);

gpiod_set_value_cansleep(ddata->enable_gpio, 0); + regulator_disable(ddata->vcc_supply);

in->ops.dpi->disable(in);

@@ -223,6 +232,10 @@ static int panel_dpi_probe_of(struct platform_device *pdev) if (IS_ERR(gpio)) return PTR_ERR(gpio);

+ ddata->vcc_supply = devm_regulator_get(&pdev->dev, "vcc"); + if (IS_ERR(ddata->vcc_supply)) + return PTR_ERR(ddata->vcc_supply); + ddata->backlight_gpio = -ENOENT;

r = of_get_display_timing(node, "panel-timing", &timing);