diff options
Diffstat (limited to 'drivers/gpu/drm/stm/ltdc.c')
| -rw-r--r-- | drivers/gpu/drm/stm/ltdc.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 3ab4fbf8eb0d..5b51298921cf 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -15,6 +15,7 @@ #include <linux/module.h> #include <linux/of_address.h> #include <linux/of_graph.h> +#include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> @@ -1040,6 +1041,36 @@ static const struct drm_encoder_funcs ltdc_encoder_funcs = { .destroy = drm_encoder_cleanup, }; +static void ltdc_encoder_disable(struct drm_encoder *encoder) +{ + struct drm_device *ddev = encoder->dev; + + DRM_DEBUG_DRIVER("\n"); + + /* Set to sleep state the pinctrl whatever type of encoder */ + pinctrl_pm_select_sleep_state(ddev->dev); +} + +static void ltdc_encoder_enable(struct drm_encoder *encoder) +{ + struct drm_device *ddev = encoder->dev; + + DRM_DEBUG_DRIVER("\n"); + + /* + * Set to default state the pinctrl only with DPI type. + * Others types like DSI, don't need pinctrl due to + * internal bridge (the signals do not come out of the chipset). + */ + if (encoder->encoder_type == DRM_MODE_ENCODER_DPI) + pinctrl_pm_select_default_state(ddev->dev); +} + +static const struct drm_encoder_helper_funcs ltdc_encoder_helper_funcs = { + .disable = ltdc_encoder_disable, + .enable = ltdc_encoder_enable, +}; + static int ltdc_encoder_init(struct drm_device *ddev, struct drm_bridge *bridge) { struct drm_encoder *encoder; @@ -1055,6 +1086,8 @@ static int ltdc_encoder_init(struct drm_device *ddev, struct drm_bridge *bridge) drm_encoder_init(ddev, encoder, <dc_encoder_funcs, DRM_MODE_ENCODER_DPI, NULL); + drm_encoder_helper_add(encoder, <dc_encoder_helper_funcs); + ret = drm_bridge_attach(encoder, bridge, NULL); if (ret) { drm_encoder_cleanup(encoder); @@ -1236,8 +1269,8 @@ int ltdc_load(struct drm_device *ddev) /* Add endpoints panels or bridges if any */ for (i = 0; i < MAX_ENDPOINTS; i++) { if (panel[i]) { - bridge[i] = drm_panel_bridge_add(panel[i], - DRM_MODE_CONNECTOR_DPI); + bridge[i] = drm_panel_bridge_add_typed(panel[i], + DRM_MODE_CONNECTOR_DPI); if (IS_ERR(bridge[i])) { DRM_ERROR("panel-bridge endpoint %d\n", i); ret = PTR_ERR(bridge[i]); @@ -1280,6 +1313,8 @@ int ltdc_load(struct drm_device *ddev) clk_disable_unprepare(ldev->pixel_clk); + pinctrl_pm_select_sleep_state(ddev->dev); + pm_runtime_enable(ddev->dev); return 0; |