drm/i915: Remove DRM_MODE_FLAG_DBLSCAN checks from .mode_valid() hooks

We never set connector->doublescan_allowed, so the probe helper
already filters out all doublescan modes for us.

Sadly we still need to keep the explicit doublescan checks
in .compute_config as outlined in commit e4dd27aa
("drm/i915: Allow DBLSCAN user modes with eDP/LVDS/DSI")
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240402135148.23011-2-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/display/intel_crt.c

@@ -356,9 +356,6 @@ intel_crt_mode_valid(struct drm_connector *connector,
 	if (status != MODE_OK)
 		return status;
 
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
-		return MODE_NO_DBLESCAN;
-
 	if (mode->clock < 25000)
 		return MODE_CLOCK_LOW;
 

drivers/gpu/drm/i915/display/intel_dp_mst.c

@@ -1302,11 +1302,6 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
 	if (*status != MODE_OK)
 		return 0;
 
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
-		*status = MODE_NO_DBLESCAN;
-		return 0;
-	}
-
 	max_link_clock = intel_dp_max_link_rate(intel_dp);
 	max_lanes = intel_dp_max_lane_count(intel_dp);
 

drivers/gpu/drm/i915/display/intel_dsi.c

@@ -69,9 +69,6 @@ enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
 
 	drm_dbg_kms(&dev_priv->drm, "\n");
 
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
-		return MODE_NO_DBLESCAN;
-
 	status = intel_panel_mode_valid(intel_connector, mode);
 	if (status != MODE_OK)
 		return status;

drivers/gpu/drm/i915/display/intel_dvo.c

@@ -231,9 +231,6 @@ intel_dvo_mode_valid(struct drm_connector *_connector,
 	if (status != MODE_OK)
 		return status;
 
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
-		return MODE_NO_DBLESCAN;
-
 	/* XXX: Validate clock range */
 
 	if (fixed_mode) {

drivers/gpu/drm/i915/display/intel_lvds.c

@@ -399,9 +399,6 @@ intel_lvds_mode_valid(struct drm_connector *_connector,
 	if (status != MODE_OK)
 		return status;
 
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
-		return MODE_NO_DBLESCAN;
-
 	status = intel_panel_mode_valid(connector, mode);
 	if (status != MODE_OK)
 		return status;

drivers/gpu/drm/i915/display/intel_sdvo.c

@@ -1952,9 +1952,6 @@ intel_sdvo_mode_valid(struct drm_connector *connector,
 	if (status != MODE_OK)
 		return status;
 
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
-		return MODE_NO_DBLESCAN;
-
 	if (clock > max_dotclk)
 		return MODE_CLOCK_HIGH;
 

drivers/gpu/drm/i915/display/intel_tv.c

@@ -969,9 +969,6 @@ intel_tv_mode_valid(struct drm_connector *connector,
 	if (status != MODE_OK)
 		return status;
 
-	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
-		return MODE_NO_DBLESCAN;
-
 	if (mode->clock > max_dotclk)
 		return MODE_CLOCK_HIGH;