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Signed-off-by: Peter Rosin --- drivers/gpu/drm/bridge/lvds-encoder.c | 34 +++++++++++++++++++++++++++++++= +++ 1 file changed, 34 insertions(+) diff --git a/drivers/gpu/drm/bridge/lvds-encoder.c b/drivers/gpu/drm/bridge= /lvds-encoder.c index f6770e83d49d..36d8557bc097 100644 --- a/drivers/gpu/drm/bridge/lvds-encoder.c +++ b/drivers/gpu/drm/bridge/lvds-encoder.c @@ -11,11 +11,13 @@ #include #include =20 +#include #include =20 struct lvds_encoder { struct drm_bridge bridge; struct drm_bridge *panel_bridge; + struct gpio_desc *powerdown_gpio; }; =20 static int lvds_encoder_attach(struct drm_bridge *bridge) @@ -28,8 +30,30 @@ static int lvds_encoder_attach(struct drm_bridge *bridge= ) bridge); } =20 +static void lvds_encoder_enable(struct drm_bridge *bridge) +{ + struct lvds_encoder *lvds_encoder =3D container_of(bridge, + struct lvds_encoder, + bridge); + + if (lvds_encoder->powerdown_gpio) + gpiod_set_value_cansleep(lvds_encoder->powerdown_gpio, 0); +} + +static void lvds_encoder_disable(struct drm_bridge *bridge) +{ + struct lvds_encoder *lvds_encoder =3D container_of(bridge, + struct lvds_encoder, + bridge); + + if (lvds_encoder->powerdown_gpio) + gpiod_set_value_cansleep(lvds_encoder->powerdown_gpio, 1); +} + static struct drm_bridge_funcs funcs =3D { .attach =3D lvds_encoder_attach, + .enable =3D lvds_encoder_enable, + .disable =3D lvds_encoder_disable, }; =20 static int lvds_encoder_probe(struct platform_device *pdev) @@ -45,6 +69,16 @@ static int lvds_encoder_probe(struct platform_device *pd= ev) if (!lvds_encoder) return -ENOMEM; =20 + lvds_encoder->powerdown_gpio =3D devm_gpiod_get_optional(dev, "powerdown"= , + GPIOD_OUT_HIGH); + if (IS_ERR(lvds_encoder->powerdown_gpio)) { + int err =3D PTR_ERR(lvds_encoder->powerdown_gpio); + + if (err !=3D -EPROBE_DEFER) + dev_err(dev, "powerdown GPIO failure: %d\n", err); + return err; + } + /* Locate the panel DT node. */ port =3D of_graph_get_port_by_id(dev->of_node, 1); if (!port) { --=20 2.11.0