[PATCH] drm/i915/cnl: Add support for horizontal plane flipping

* [PATCH] drm/i915/cnl: Add support for horizontal plane flipping
@ 2017-08-21 23:58 Rodrigo Vivi
  2017-08-22  0:29 ` ✓ Fi.CI.BAT: success for " Patchwork
  0 siblings, 1 reply; 6+ messages in thread
From: Rodrigo Vivi @ 2017-08-21 23:58 UTC (permalink / raw)
  To: intel-gfx; +Cc: Rodrigo Vivi

From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

CNL supports horizontal plane flipping on non-linear plane formats.

v2:
- Avoid BUG unlike elsewhere in the code (Ville)
- Hoist the rotation-tiling restriction check (Ville)

Bspec: 7656
Suggested-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h      |  1 +
 drivers/gpu/drm/i915/intel_display.c | 39 +++++++++++++++++++++++++++++++-----
 2 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d4ecb1905ad8..d7621622b58b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6268,6 +6268,7 @@ enum {
 #define   PLANE_CTL_TILED_X			(  1 << 10)
 #define   PLANE_CTL_TILED_Y			(  4 << 10)
 #define   PLANE_CTL_TILED_YF			(  5 << 10)
+#define   PLANE_CTL_FLIP_HORIZONTAL		(  1 << 8)
 #define   PLANE_CTL_ALPHA_MASK			(0x3 << 4)
 #define   PLANE_CTL_ALPHA_DISABLE		(  0 << 4)
 #define   PLANE_CTL_ALPHA_SW_PREMULTIPLY	(  2 << 4)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3b95cf953335..e312096273c0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3139,6 +3139,12 @@ int skl_check_plane_surface(struct intel_plane_state *plane_state)
 	unsigned int rotation = plane_state->base.rotation;
 	int ret;
 
+	if (rotation & DRM_MODE_REFLECT_X &&
+	    fb->modifier == DRM_FORMAT_MOD_LINEAR) {
+                DRM_DEBUG_KMS("horizontal flip is not supported with linear surface formats\n");
+                return -EINVAL;
+	}
+
 	if (!plane_state->base.visible)
 		return 0;
 
@@ -3480,9 +3486,9 @@ static u32 skl_plane_ctl_tiling(uint64_t fb_modifier)
 	return 0;
 }
 
-static u32 skl_plane_ctl_rotation(unsigned int rotation)
+static u32 skl_plane_ctl_rotate(unsigned int rotate)
 {
-	switch (rotation) {
+	switch (rotate) {
 	case DRM_MODE_ROTATE_0:
 		break;
 	/*
@@ -3496,7 +3502,22 @@ static u32 skl_plane_ctl_rotation(unsigned int rotation)
 	case DRM_MODE_ROTATE_270:
 		return PLANE_CTL_ROTATE_90;
 	default:
-		MISSING_CASE(rotation);
+		MISSING_CASE(rotate);
+	}
+
+	return 0;
+}
+
+static u32 cnl_plane_ctl_flip(unsigned int reflect)
+{
+	switch (reflect) {
+	case 0:
+		break;
+	case DRM_MODE_REFLECT_X:
+		return PLANE_CTL_FLIP_HORIZONTAL;
+	case DRM_MODE_REFLECT_Y:
+	default:
+		MISSING_CASE(reflect);
 	}
 
 	return 0;
@@ -3523,7 +3544,10 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
 
 	plane_ctl |= skl_plane_ctl_format(fb->format->format);
 	plane_ctl |= skl_plane_ctl_tiling(fb->modifier);
-	plane_ctl |= skl_plane_ctl_rotation(rotation);
+	plane_ctl |= skl_plane_ctl_rotate(rotation & DRM_MODE_ROTATE_MASK);
+
+	if (INTEL_GEN(dev_priv) >= 10)
+		plane_ctl |= cnl_plane_ctl_flip(rotation & DRM_MODE_REFLECT_MASK);
 
 	if (key->flags & I915_SET_COLORKEY_DESTINATION)
 		plane_ctl |= PLANE_CTL_KEY_ENABLE_DESTINATION;
@@ -13249,7 +13273,12 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 	if (ret)
 		goto fail;
 
-	if (INTEL_GEN(dev_priv) >= 9) {
+	if (INTEL_GEN(dev_priv) >= 10) {
+		supported_rotations =
+			DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 |
+			DRM_MODE_ROTATE_180 | DRM_MODE_ROTATE_270 |
+			DRM_MODE_REFLECT_X;
+	} else if (INTEL_GEN(dev_priv) >= 9) {
 		supported_rotations =
 			DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 |
 			DRM_MODE_ROTATE_180 | DRM_MODE_ROTATE_270;
-- 
2.13.2

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