On 01/04/2025 07:11, Dmitry Baryshkov wrote:
Follow the example of other drivers and ignore return values of the
drm_panel_prepare() / unprepare() / enable() / disable() calls. There is
no possible error recovery, so the driver just logs a message.

Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@oss.qualcomm.com>
---
  drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 39 ++++------------------
  1 file changed, 6 insertions(+), 33 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c 
b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 
f60068011008482f7b7b2edfcab5fb1b3e9e130f..c7dffdae31877ae194fc6b0a5bf21be203f7dcc4
 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -838,10 +838,7 @@ static int analogix_dp_commit(struct analogix_dp_device 
*dp)
        int ret;
/* Keep the panel disabled while we configure video */
-       if (dp->plat_data->panel) {
-               if (drm_panel_disable(dp->plat_data->panel))
-                       DRM_ERROR("failed to disable the panel\n");
-       }
+       drm_panel_disable(dp->plat_data->panel);
ret = analogix_dp_train_link(dp);
        if (ret) {
@@ -863,13 +860,7 @@ static int analogix_dp_commit(struct analogix_dp_device 
*dp)
        }
/* Safe to enable the panel now */
-       if (dp->plat_data->panel) {
-               ret = drm_panel_enable(dp->plat_data->panel);
-               if (ret) {
-                       DRM_ERROR("failed to enable the panel\n");
-                       return ret;
-               }
-       }
+       drm_panel_enable(dp->plat_data->panel);
/* Check whether panel supports fast training */
        ret = analogix_dp_fast_link_train_detection(dp);
@@ -1136,7 +1127,6 @@ static void analogix_dp_bridge_atomic_pre_enable(struct 
drm_bridge *bridge,
        struct analogix_dp_device *dp = bridge->driver_private;
        struct drm_crtc *crtc;
        struct drm_crtc_state *old_crtc_state;
-       int ret;
crtc = analogix_dp_get_new_crtc(dp, old_state);
        if (!crtc)
@@ -1147,11 +1137,7 @@ static void analogix_dp_bridge_atomic_pre_enable(struct 
drm_bridge *bridge,
        if (old_crtc_state && old_crtc_state->self_refresh_active)
                return;
- if (dp->plat_data->panel) {
-               ret = drm_panel_prepare(dp->plat_data->panel);
-               if (ret)
-                       DRM_ERROR("failed to prepare the panel ret = %d\n", 
ret);
-       }
+       drm_panel_prepare(dp->plat_data->panel);
  }
static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
@@ -1231,17 +1217,11 @@ static void analogix_dp_bridge_atomic_enable(struct 
drm_bridge *bridge,
  static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
  {
        struct analogix_dp_device *dp = bridge->driver_private;
-       int ret;
if (dp->dpms_mode != DRM_MODE_DPMS_ON)
                return;
- if (dp->plat_data->panel) {
-               if (drm_panel_disable(dp->plat_data->panel)) {
-                       DRM_ERROR("failed to disable the panel\n");
-                       return;
-               }
-       }
+       drm_panel_disable(dp->plat_data->panel);
disable_irq(dp->irq); @@ -1249,11 +1229,7 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge) pm_runtime_put_sync(dp->dev); - if (dp->plat_data->panel) {
-               ret = drm_panel_unprepare(dp->plat_data->panel);
-               if (ret)
-                       DRM_ERROR("failed to unprepare the panel ret = %d\n", 
ret);
-       }
+       drm_panel_unprepare(dp->plat_data->panel);
dp->fast_train_enable = false;
        dp->psr_supported = false;
@@ -1678,10 +1654,7 @@ void analogix_dp_unbind(struct analogix_dp_device *dp)
        analogix_dp_bridge_disable(dp->bridge);
        dp->connector.funcs->destroy(&dp->connector);
- if (dp->plat_data->panel) {
-               if (drm_panel_unprepare(dp->plat_data->panel))
-                       DRM_ERROR("failed to turnoff the panel\n");
-       }
+       drm_panel_unprepare(dp->plat_data->panel);
drm_dp_aux_unregister(&dp->aux);

Reviewed-by: Neil Armstrong <neil.armstr...@linaro.org>

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