[PATCH 5/7] drm/i915: Use & instead if == to check for rotations

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Using == to check for 180 degree rotation only works as long as the
reflection bits aren't set. That will change soon enough for CHV, so
let's stop doing things the wrong way.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 9 +++++----
 drivers/gpu/drm/i915/intel_sprite.c  | 6 +++---
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 93ecb259c5ce..79c1a8b89d1d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2688,7 +2688,7 @@ static void i9xx_update_primary_plane(struct drm_plane *primary,
 		intel_crtc->dspaddr_offset = linear_offset;
 	}
 
-	if (rotation == BIT(DRM_ROTATE_180)) {
+	if (rotation & BIT(DRM_ROTATE_180)) {
 		dspcntr |= DISPPLANE_ROTATE_180;
 
 		x += (crtc_state->pipe_src_w - 1);
@@ -2791,7 +2791,8 @@ static void ironlake_update_primary_plane(struct drm_plane *primary,
 		intel_compute_tile_offset(&x, &y, fb, 0,
 					  fb->pitches[0], rotation);
 	linear_offset -= intel_crtc->dspaddr_offset;
-	if (rotation == BIT(DRM_ROTATE_180)) {
+
+	if (rotation & BIT(DRM_ROTATE_180)) {
 		dspcntr |= DISPPLANE_ROTATE_180;
 
 		if (!IS_HASWELL(dev) && !IS_BROADWELL(dev)) {
@@ -10263,7 +10264,7 @@ static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base,
 		if (HAS_DDI(dev))
 			cntl |= CURSOR_PIPE_CSC_ENABLE;
 
-		if (plane_state->base.rotation == BIT(DRM_ROTATE_180))
+		if (plane_state->base.rotation & BIT(DRM_ROTATE_180))
 			cntl |= CURSOR_ROTATE_180;
 	}
 
@@ -10309,7 +10310,7 @@ static void intel_crtc_update_cursor(struct drm_crtc *crtc,
 
 		/* ILK+ do this automagically */
 		if (HAS_GMCH_DISPLAY(dev) &&
-		    plane_state->base.rotation == BIT(DRM_ROTATE_180)) {
+		    plane_state->base.rotation & BIT(DRM_ROTATE_180)) {
 			base += (plane_state->base.crtc_h *
 				 plane_state->base.crtc_w - 1) * 4;
 		}
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index bc41c1bba04c..6b815d57d75a 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -444,7 +444,7 @@ vlv_update_plane(struct drm_plane *dplane,
 						   fb->pitches[0], rotation);
 	linear_offset -= sprsurf_offset;
 
-	if (rotation == BIT(DRM_ROTATE_180)) {
+	if (rotation & BIT(DRM_ROTATE_180)) {
 		sprctl |= SP_ROTATE_180;
 
 		x += src_w;
@@ -577,7 +577,7 @@ ivb_update_plane(struct drm_plane *plane,
 						   fb->pitches[0], rotation);
 	linear_offset -= sprsurf_offset;
 
-	if (rotation == BIT(DRM_ROTATE_180)) {
+	if (rotation & BIT(DRM_ROTATE_180)) {
 		sprctl |= SPRITE_ROTATE_180;
 
 		/* HSW and BDW does this automagically in hardware */
@@ -714,7 +714,7 @@ ilk_update_plane(struct drm_plane *plane,
 						   fb->pitches[0], rotation);
 	linear_offset -= dvssurf_offset;
 
-	if (rotation == BIT(DRM_ROTATE_180)) {
+	if (rotation & BIT(DRM_ROTATE_180)) {
 		dvscntr |= DVS_ROTATE_180;
 
 		x += src_w;
-- 
2.7.4