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path: root/drivers/gpu/drm/stm/ltdc.c
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Diffstat (limited to 'drivers/gpu/drm/stm/ltdc.c')
-rw-r--r--drivers/gpu/drm/stm/ltdc.c39
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, &ltdc_encoder_funcs,
DRM_MODE_ENCODER_DPI, NULL);
+ drm_encoder_helper_add(encoder, &ltdc_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;