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: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/bridge/ti-tfp410.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
index e4280f5af9f5..d25d23cfe3f5 100644
--- a/drivers/gpu/drm/bridge/ti-tfp410.c
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -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);
--
Regards,
Laurent Pinchart
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