drm/msm/dp: simplify dp_connector_get_modes()

Since dp_panel_get_modes() handling for dp_mode was removed,
dp_display_get_modes also doesn't change the passed dp_mode, drop the
unused dp_mode variable being allocated unused and then freed.

Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/480137/
Link: https://lore.kernel.org/r/20220330223008.649274-3-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/dp/dp_display.c

@@ -1030,11 +1030,9 @@ enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
 	return MODE_OK;
 }
 
-int dp_display_get_modes(struct msm_dp *dp,
-				struct dp_display_mode *dp_mode)
+int dp_display_get_modes(struct msm_dp *dp)
 {
 	struct dp_display_private *dp_display;
-	int ret = 0;
 
 	if (!dp) {
 		DRM_ERROR("invalid params\n");
@@ -1043,11 +1041,8 @@ int dp_display_get_modes(struct msm_dp *dp,
 
 	dp_display = container_of(dp, struct dp_display_private, dp_display);
 
-	ret = dp_panel_get_modes(dp_display->panel,
+	return dp_panel_get_modes(dp_display->panel,
 		dp->connector);
-	if (dp_mode->drm_mode.clock)
-		dp->max_pclk_khz = dp_mode->drm_mode.clock;
-	return ret;
 }
 
 bool dp_display_check_video_test(struct msm_dp *dp)

drivers/gpu/drm/msm/dp/dp_display.h

@@ -34,8 +34,7 @@ struct msm_dp {
 
 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 		hdmi_codec_plugged_cb fn, struct device *codec_dev);
-int dp_display_get_modes(struct msm_dp *dp_display,
-		struct dp_display_mode *dp_mode);
+int dp_display_get_modes(struct msm_dp *dp_display);
 int dp_display_request_irq(struct msm_dp *dp_display);
 bool dp_display_check_video_test(struct msm_dp *dp_display);
 int dp_display_get_test_bpp(struct msm_dp *dp_display);

drivers/gpu/drm/msm/dp/dp_drm.c

@@ -41,49 +41,22 @@ static int dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *
 {
 	int rc = 0;
 	struct msm_dp *dp;
-	struct dp_display_mode *dp_mode = NULL;
-	struct drm_display_mode *m, drm_mode;
 
 	if (!connector)
 		return 0;
 
 	dp = to_dp_bridge(bridge)->dp_display;
 
-	dp_mode = kzalloc(sizeof(*dp_mode),  GFP_KERNEL);
-	if (!dp_mode)
-		return 0;
-
 	/* pluggable case assumes EDID is read when HPD */
 	if (dp->is_connected) {
-		/*
-		 *The get_modes() function might return one mode that is stored
-		 * in dp_mode when compliance test is in progress. If not, the
-		 * return value is equal to the total number of modes supported
-		 * by the sink
-		 */
-		rc = dp_display_get_modes(dp, dp_mode);
+		rc = dp_display_get_modes(dp);
 		if (rc <= 0) {
 			DRM_ERROR("failed to get DP sink modes, rc=%d\n", rc);
-			kfree(dp_mode);
 			return rc;
 		}
-		if (dp_mode->drm_mode.clock) { /* valid DP mode */
-			memset(&drm_mode, 0x0, sizeof(drm_mode));
-			drm_mode_copy(&drm_mode, &dp_mode->drm_mode);
-			m = drm_mode_duplicate(connector->dev, &drm_mode);
-			if (!m) {
-				DRM_ERROR("failed to add mode %ux%u\n",
-				       drm_mode.hdisplay,
-				       drm_mode.vdisplay);
-				kfree(dp_mode);
-				return 0;
-			}
-			drm_mode_probed_add(connector, m);
-		}
 	} else {
 		drm_dbg_dp(connector->dev, "No sink connected\n");
 	}
-	kfree(dp_mode);
 	return rc;
 }