drm/atomic: Handle picture_aspect_ratio in atomic core

This is only used in i915, which had used its own non-atomic way to
deal with the picture aspect ratio. Move selected aspect_ratio to
atomic state and use the atomic state in the affected i915 connectors.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170501133804.8116-2-maarten.lankhorst@linux.intel.com
[mlankhorst: taomic -> atomic thanks to Manasi's input]
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 1d623b5..c6b8207 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1403,7 +1403,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
 	}
 
 	/* Set user selected PAR to incoming mode's member */
-	adjusted_mode->picture_aspect_ratio = intel_hdmi->aspect_ratio;
+	adjusted_mode->picture_aspect_ratio = conn_state->picture_aspect_ratio;
 
 	pipe_config->lane_count = 4;
 
@@ -1649,19 +1649,7 @@ intel_hdmi_set_property(struct drm_connector *connector,
 	}
 
 	if (property == connector->dev->mode_config.aspect_ratio_property) {
-		switch (val) {
-		case DRM_MODE_PICTURE_ASPECT_NONE:
-			intel_hdmi->aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
-			break;
-		case DRM_MODE_PICTURE_ASPECT_4_3:
-			intel_hdmi->aspect_ratio = HDMI_PICTURE_ASPECT_4_3;
-			break;
-		case DRM_MODE_PICTURE_ASPECT_16_9:
-			intel_hdmi->aspect_ratio = HDMI_PICTURE_ASPECT_16_9;
-			break;
-		default:
-			return -EINVAL;
-		}
+		connector->state->picture_aspect_ratio = val;
 		goto done;
 	}
 
@@ -1823,7 +1811,7 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *c
 	intel_attach_broadcast_rgb_property(connector);
 	intel_hdmi->color_range_auto = true;
 	intel_attach_aspect_ratio_property(connector);
-	intel_hdmi->aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
+	connector->state->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
 }
 
 /*