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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2018-10-01 18:07:48 +0300 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2019-03-18 12:42:13 +0300 |
| commit | 38c02db7e66e3582d2712f8a066c0e85583b3bb1 (patch) | |
| tree | 010dfa18c1c45a993e9cb567d4610eca21dd67ff /drivers/gpu/drm/bridge/ti-tfp410.c | |
| parent | 60b903c3e621ccb61fc9432fc32d64c6e3604955 (diff) | |
| download | linux-38c02db7e66e3582d2712f8a066c0e85583b3bb1.tar.xz | |
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: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Jyri Sarha <jsarha@ti.com>
Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/gpu/drm/bridge/ti-tfp410.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/ti-tfp410.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c index daf0967e00ba..b0213d573434 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); |