[Intel-gfx] [PATCH 3/5] drm/i915: Introduce HAS_NV12 and define WA 0870.

[Rodrigo Vivi]

Let's introduce HAS_NV12 to check for feature itself
than spread the platform checks everywhere.

Also let's introduce the WA number that is the
cause of having NV12 disabled on both SLK and BXT.

According to Spec:

WA 0870: "Display flickers with NV12 video playback in
Y tiling mode.
WA: Use YUV422 surface format instead of NV12."

Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h          | 1 +
 drivers/gpu/drm/i915/i915_pci.c          | 5 +++++
 drivers/gpu/drm/i915/intel_device_info.h | 1 +
 drivers/gpu/drm/i915/intel_display.c     | 7 +++----
 drivers/gpu/drm/i915/intel_sprite.c      | 2 +-
 5 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c9e5bab6861b..57ea094054d5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2630,6 +2630,7 @@ intel_info(const struct drm_i915_private *dev_priv)
 #define HAS_RC6pp(dev_priv)		 (false) /* HW was never validated */
 
 #define HAS_CSR(dev_priv)	((dev_priv)->info.has_csr)
+#define HAS_NV12(dev_priv)	((dev_priv)->info.has_nv12)
 
 #define HAS_RUNTIME_PM(dev_priv) ((dev_priv)->info.has_runtime_pm)
 #define HAS_64BIT_RELOC(dev_priv) ((dev_priv)->info.has_64bit_reloc)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 44e745921ac1..eb797c1ef842 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -462,6 +462,7 @@ static const struct intel_device_info intel_cherryview_info = {
 	GEN(9), \
 	GEN9_DEFAULT_PAGE_SIZES, \
 	.has_logical_ring_preemption = 1, \
+	.has_nv12 = 1, \
 	.has_csr = 1, \
 	.has_guc = 1, \
 	.has_ipc = 1, \
@@ -471,6 +472,8 @@ static const struct intel_device_info intel_cherryview_info = {
 	GEN9_FEATURES, \
 	/* Display WA #0477 WaDisableIPC: skl */ \
 	.has_ipc = 0, \
+	/* Display WA #0870: skl */ \
+	.has_nv12 = 0, \
 	PLATFORM(INTEL_SKYLAKE)
 
 static const struct intel_device_info intel_skylake_gt1_info = {
@@ -531,6 +534,8 @@ static const struct intel_device_info intel_broxton_info = {
 	GEN9_LP_FEATURES,
 	PLATFORM(INTEL_BROXTON),
 	.ddb_size = 512,
+	/* Display WA #0870: bxt */
+	.has_nv12 = 0,
 };
 
 static const struct intel_device_info intel_geminilake_info = {
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index b4c2c4eae78b..ba9e9c59dc6c 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -104,6 +104,7 @@ enum intel_ppgtt {
 	func(has_logical_ring_contexts); \
 	func(has_logical_ring_elsq); \
 	func(has_logical_ring_preemption); \
+	func(has_nv12); \
 	func(has_overlay); \
 	func(has_pooled_eu); \
 	func(has_psr); \
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index dd88ffe9e273..14f6f66b00d2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -470,7 +470,7 @@ skl_wa_528(struct drm_i915_private *dev_priv, int pipe, bool enable)
 static void
 skl_wa_clkgate(struct drm_i915_private *dev_priv, int pipe, bool enable)
 {
-	if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
+	if (!HAS_NV12(dev_priv))
 		return;
 
 	if (enable)
@@ -5239,7 +5239,7 @@ static bool needs_nv12_wa(struct drm_i915_private *dev_priv,
 	if (!crtc_state->nv12_planes)
 		return false;
 
-	if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
+	if (!HAS_NV12(dev_priv))
 		return false;
 
 	/* WA Display #0827: Gen9:all */
@@ -14519,8 +14519,7 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 		}
 		break;
 	case DRM_FORMAT_NV12:
-		if (INTEL_GEN(dev_priv) < 9 || IS_SKYLAKE(dev_priv) ||
-		    IS_BROXTON(dev_priv)) {
+		if (!HAS_NV12(dev_priv)) {
 			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
 				      drm_get_format_name(mode_cmd->pixel_format,
 							  &format_name));
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index e7c95ec879cc..582a2972c90d 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -1868,7 +1868,7 @@ static bool skl_plane_has_planar(struct drm_i915_private *dev_priv,
 	if (INTEL_GEN(dev_priv) >= 11)
 		return plane_id <= PLANE_SPRITE3;
 
-	if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
+	if (!HAS_NV12(dev_priv))
 		return false;
 
 	if (IS_GEN9(dev_priv) && !IS_GEMINILAKE(dev_priv) && pipe == PIPE_C)
-- 
2.19.1