drm/i915: Do not override mode's aspect ratio with the prop value NONE

HDMI_PICTURE_ASPECT_NONE means "Automatic" so when the user has that
selected we should keep whatever aspect ratio the mode already has.

Also no point in checking for connector->is_hdmi in the SDVO code
since we only attach the property to HDMI connectors.

Cc: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190620142639.17518-5-ville.syrjala@linux.intel.comReviewed-by: Uma Shankar <uma.shankar@intel.com>

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

@@ -2451,8 +2451,9 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder,
 	if (ret)
 		return ret;
 
-	/* Set user selected PAR to incoming mode's member */
-	adjusted_mode->picture_aspect_ratio = conn_state->picture_aspect_ratio;
+	if (conn_state->picture_aspect_ratio)
+		adjusted_mode->picture_aspect_ratio =
+			conn_state->picture_aspect_ratio;
 
 	pipe_config->lane_count = 4;
 

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

@@ -1349,9 +1349,9 @@ static int intel_sdvo_compute_config(struct intel_encoder *encoder,
 	if (IS_TV(intel_sdvo_connector))
 		i9xx_adjust_sdvo_tv_clock(pipe_config);
 
-	/* Set user selected PAR to incoming mode's member */
-	if (intel_sdvo_connector->is_hdmi)
-		adjusted_mode->picture_aspect_ratio = conn_state->picture_aspect_ratio;
+	if (conn_state->picture_aspect_ratio)
+		adjusted_mode->picture_aspect_ratio =
+			conn_state->picture_aspect_ratio;
 
 	if (!intel_sdvo_compute_avi_infoframe(intel_sdvo,
 					      pipe_config, conn_state)) {