diff options
Diffstat (limited to 'drivers/gpu/drm/bridge/lvds-codec.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/lvds-codec.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c index f19d9f7a5db2..f52ccffc1bd1 100644 --- a/drivers/gpu/drm/bridge/lvds-codec.c +++ b/drivers/gpu/drm/bridge/lvds-codec.c @@ -10,13 +10,16 @@ #include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/platform_device.h> +#include <linux/regulator/consumer.h> #include <drm/drm_bridge.h> #include <drm/drm_panel.h> struct lvds_codec { + struct device *dev; struct drm_bridge bridge; struct drm_bridge *panel_bridge; + struct regulator *vcc; struct gpio_desc *powerdown_gpio; u32 connector_type; }; @@ -38,6 +41,14 @@ static int lvds_codec_attach(struct drm_bridge *bridge, static void lvds_codec_enable(struct drm_bridge *bridge) { struct lvds_codec *lvds_codec = to_lvds_codec(bridge); + int ret; + + ret = regulator_enable(lvds_codec->vcc); + if (ret) { + dev_err(lvds_codec->dev, + "Failed to enable regulator \"vcc\": %d\n", ret); + return; + } if (lvds_codec->powerdown_gpio) gpiod_set_value_cansleep(lvds_codec->powerdown_gpio, 0); @@ -46,9 +57,15 @@ static void lvds_codec_enable(struct drm_bridge *bridge) static void lvds_codec_disable(struct drm_bridge *bridge) { struct lvds_codec *lvds_codec = to_lvds_codec(bridge); + int ret; if (lvds_codec->powerdown_gpio) gpiod_set_value_cansleep(lvds_codec->powerdown_gpio, 1); + + ret = regulator_disable(lvds_codec->vcc); + if (ret) + dev_err(lvds_codec->dev, + "Failed to disable regulator \"vcc\": %d\n", ret); } static const struct drm_bridge_funcs funcs = { @@ -63,12 +80,24 @@ static int lvds_codec_probe(struct platform_device *pdev) struct device_node *panel_node; struct drm_panel *panel; struct lvds_codec *lvds_codec; + int ret; lvds_codec = devm_kzalloc(dev, sizeof(*lvds_codec), GFP_KERNEL); if (!lvds_codec) return -ENOMEM; + lvds_codec->dev = &pdev->dev; lvds_codec->connector_type = (uintptr_t)of_device_get_match_data(dev); + + lvds_codec->vcc = devm_regulator_get(lvds_codec->dev, "power"); + if (IS_ERR(lvds_codec->vcc)) { + ret = PTR_ERR(lvds_codec->vcc); + if (ret != -EPROBE_DEFER) + dev_err(lvds_codec->dev, + "Unable to get \"vcc\" supply: %d\n", ret); + return ret; + } + lvds_codec->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH); if (IS_ERR(lvds_codec->powerdown_gpio)) |