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Commit 38c02db7 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Tomi Valkeinen
Browse files

drm/bridge: ti-tfp410: Add support for the powerdown GPIO 



The TFP410 has a powerdown pin that can be connected to a GPIO to
control power saving. The DT bindings define a corresponding property,
but the driver doesn't implement support for it. Fix that.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: default avatarJyri Sarha <jsarha@ti.com>
Tested-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent 60b903c3

drivers/gpu/drm/bridge/ti-tfp410.c

+24 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ struct tfp410 { 
	struct i2c_adapter	*ddc;

	struct gpio_desc	*hpd;

	struct delayed_work	hpd_work;

	struct gpio_desc	*powerdown;



	struct device *dev;

};
@@ -139,8 +140,24 @@ static int tfp410_attach(struct drm_bridge *bridge) 
	return 0;

}



static void tfp410_enable(struct drm_bridge *bridge)

{

	struct tfp410 *dvi = drm_bridge_to_tfp410(bridge);



	gpiod_set_value_cansleep(dvi->powerdown, 0);

}



static void tfp410_disable(struct drm_bridge *bridge)

{

	struct tfp410 *dvi = drm_bridge_to_tfp410(bridge);



	gpiod_set_value_cansleep(dvi->powerdown, 1);

}



static const struct drm_bridge_funcs tfp410_bridge_funcs = {

	.attach		= tfp410_attach,

	.enable		= tfp410_enable,

	.disable	= tfp410_disable,

};



static void tfp410_hpd_work_func(struct work_struct *work)
@@ -229,6 +246,13 @@ static int tfp410_init(struct device *dev) 
	if (ret)

		goto fail;



	dvi->powerdown = devm_gpiod_get_optional(dev, "powerdown",

						 GPIOD_OUT_HIGH);

	if (IS_ERR(dvi->powerdown)) {

		dev_err(dev, "failed to parse powerdown gpio\n");

		return PTR_ERR(dvi->powerdown);

	}



	if (dvi->hpd) {

		INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func);