From: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Date: Tue, 1 Apr 2025 05:11:33 +0000 (+0300)
Subject: drm/bridge: analogix_dp: drop extra calls to analogix_dp_prepare_panel()
X-Git-Tag: v6.16-rc1~144^2~16^2~42
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b65cbfe0e1d8bcb74dbeb221d423dd926f326d05;p=thirdparty%2Fkernel%2Flinux.git

drm/bridge: analogix_dp: drop extra calls to analogix_dp_prepare_panel()

The analogix_dp_prepare_panel() returns immediately if there is no
attached panel. Drop several calls to this function which are performed
when dp->plat_data->panel is NULL.

Tested-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250401-panel-return-void-v1-1-93e1be33dc8d@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 838454d6bdebb..2dd04f4d54941 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1005,17 +1005,11 @@ static int analogix_dp_get_modes(struct drm_connector *connector)
 {
 	struct analogix_dp_device *dp = to_dp(connector);
 	const struct drm_edid *drm_edid;
-	int ret, num_modes = 0;
+	int num_modes = 0;
 
 	if (dp->plat_data->panel) {
 		num_modes += drm_panel_get_modes(dp->plat_data->panel, connector);
 	} else {
-		ret = analogix_dp_prepare_panel(dp, true, false);
-		if (ret) {
-			DRM_ERROR("Failed to prepare panel (%d)\n", ret);
-			return 0;
-		}
-
 		drm_edid = drm_edid_read_ddc(connector, &dp->aux.ddc);
 
 		drm_edid_connector_update(&dp->connector, drm_edid);
@@ -1024,10 +1018,6 @@ static int analogix_dp_get_modes(struct drm_connector *connector)
 			num_modes += drm_edid_connector_add_modes(&dp->connector);
 			drm_edid_free(drm_edid);
 		}
-
-		ret = analogix_dp_prepare_panel(dp, false, false);
-		if (ret)
-			DRM_ERROR("Failed to unprepare panel (%d)\n", ret);
 	}
 
 	if (dp->plat_data->get_modes)
@@ -1087,19 +1077,9 @@ analogix_dp_detect(struct drm_connector *connector, bool force)
 	if (dp->plat_data->panel)
 		return connector_status_connected;
 
-	ret = analogix_dp_prepare_panel(dp, true, false);
-	if (ret) {
-		DRM_ERROR("Failed to prepare panel (%d)\n", ret);
-		return connector_status_disconnected;
-	}
-
 	if (!analogix_dp_detect_hpd(dp))
 		status = connector_status_connected;
 
-	ret = analogix_dp_prepare_panel(dp, false, false);
-	if (ret)
-		DRM_ERROR("Failed to unprepare panel (%d)\n", ret);
-
 	return status;
 }