drm: Swap w/h when converting the mode to src coordidates for a rotated primary plane

When converting the mode hdisplay/vdisplay to primary plane src
coordinates we need to take into account the current plane
rotation.

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1444930802-8515-2-git-send-email-ville.syrjala@linux.intel.comReviewed-by: NMatt Roper <matthew.d.roper@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/drm_atomic_helper.c

@@ -1790,8 +1790,13 @@ int __drm_atomic_helper_set_config(struct drm_mode_set *set,
 	primary_state->crtc_w = set->mode->hdisplay;
 	primary_state->src_x = set->x << 16;
 	primary_state->src_y = set->y << 16;
-	primary_state->src_h = set->mode->vdisplay << 16;
-	primary_state->src_w = set->mode->hdisplay << 16;
+	if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) {
+		primary_state->src_h = set->mode->hdisplay << 16;
+		primary_state->src_w = set->mode->vdisplay << 16;
+	} else {
+		primary_state->src_h = set->mode->vdisplay << 16;
+		primary_state->src_w = set->mode->hdisplay << 16;
+	}
 
 commit:
 	ret = update_output_state(state, set);