drm/i915: Add support for the YCbCr COLOR_RANGE property

Add support for the COLOR_RANGE property on planes. This property
selects whether the input YCbCr data is to treated as limited range
or full range.

On most platforms this is a matter of setting the "YUV range correction
disable" bit, and on VLV/CHV we'll just have to program the color
correction logic to pass the data through unmodified.

v2: Rebase

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Daniel Stone <daniel@fooishbar.org>
Cc: Russell King - ARM Linux <linux@armlinux.org.uk>
Cc: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Shashank Sharma <shashank.sharma@intel.com>
Cc: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180214192327.3250-9-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/i915_reg.h

@@ -6105,6 +6105,7 @@ enum {
 #define _DVSACNTR		0x72180
 #define   DVS_ENABLE		(1<<31)
 #define   DVS_GAMMA_ENABLE	(1<<30)
+#define   DVS_YUV_RANGE_CORRECTION_DISABLE	(1<<27)
 #define   DVS_PIXFORMAT_MASK	(3<<25)
 #define   DVS_FORMAT_YUV422	(0<<25)
 #define   DVS_FORMAT_RGBX101010	(1<<25)
@@ -6173,6 +6174,7 @@ enum {
 #define _SPRA_CTL		0x70280
 #define   SPRITE_ENABLE			(1<<31)
 #define   SPRITE_GAMMA_ENABLE		(1<<30)
+#define   SPRITE_YUV_RANGE_CORRECTION_DISABLE	(1<<28)
 #define   SPRITE_PIXFORMAT_MASK		(7<<25)
 #define   SPRITE_FORMAT_YUV422		(0<<25)
 #define   SPRITE_FORMAT_RGBX101010	(1<<25)
@@ -6364,6 +6366,7 @@ enum {
 #define _PLANE_CTL_3_A				0x70380
 #define   PLANE_CTL_ENABLE			(1 << 31)
 #define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)   /* Pre-GLK */
+#define   PLANE_CTL_YUV_RANGE_CORRECTION_DISABLE	(1 << 28)
 /*
  * ICL+ uses the same PLANE_CTL_FORMAT bits, but the field definition
  * expanded to include bit 23 as well. However, the shift-24 based values
@@ -6438,6 +6441,7 @@ enum {
 #define _PLANE_COLOR_CTL_2_A			0x702CC /* GLK+ */
 #define _PLANE_COLOR_CTL_3_A			0x703CC /* GLK+ */
 #define   PLANE_COLOR_PIPE_GAMMA_ENABLE		(1 << 30)
+#define   PLANE_COLOR_YUV_RANGE_CORRECTION_DISABLE	(1 << 28)
 #define   PLANE_COLOR_PIPE_CSC_ENABLE		(1 << 23)
 #define   PLANE_COLOR_CSC_MODE_BYPASS			(0 << 17)
 #define   PLANE_COLOR_CSC_MODE_YUV601_TO_RGB709		(1 << 17)

drivers/gpu/drm/i915/intel_display.c

@@ -3539,6 +3539,9 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
 
 		if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
 			plane_ctl |= PLANE_CTL_YUV_TO_RGB_CSC_FORMAT_BT709;
+
+		if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+			plane_ctl |= PLANE_CTL_YUV_RANGE_CORRECTION_DISABLE;
 	}
 
 	plane_ctl |= skl_plane_ctl_format(fb->format->format);
@@ -3573,6 +3576,9 @@ u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
 			plane_color_ctl |= PLANE_COLOR_CSC_MODE_YUV709_TO_RGB709;
 		else
 			plane_color_ctl |= PLANE_COLOR_CSC_MODE_YUV601_TO_RGB709;
+
+		if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+			plane_color_ctl |= PLANE_COLOR_YUV_RANGE_CORRECTION_DISABLE;
 	}
 
 	return plane_color_ctl;
@@ -13300,7 +13306,8 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 		drm_plane_create_color_properties(&primary->base,
 						  BIT(DRM_COLOR_YCBCR_BT601) |
 						  BIT(DRM_COLOR_YCBCR_BT709),
-						  BIT(DRM_COLOR_YCBCR_LIMITED_RANGE),
+						  BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+						  BIT(DRM_COLOR_YCBCR_FULL_RANGE),
 						  DRM_COLOR_YCBCR_BT709,
 						  DRM_COLOR_YCBCR_LIMITED_RANGE);
 

drivers/gpu/drm/i915/intel_sprite.c

@@ -414,7 +414,8 @@ vlv_update_clrc(const struct intel_plane_state *plane_state)
 	enum plane_id plane_id = plane->id;
 	int contrast, brightness, sh_scale, sh_sin, sh_cos;
 
-	if (intel_format_is_yuv(fb->format->format)) {
+	if (intel_format_is_yuv(fb->format->format) &&
+	    plane_state->base.color_range == DRM_COLOR_YCBCR_LIMITED_RANGE) {
 		/*
 		 * Expand limited range to full range:
 		 * Contrast is applied first and is used to expand Y range.
@@ -650,6 +651,9 @@ static u32 ivb_sprite_ctl(const struct intel_crtc_state *crtc_state,
 	if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
 		sprctl |= SPRITE_YUV_TO_RGB_CSC_FORMAT_BT709;
 
+	if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+		sprctl |= SPRITE_YUV_RANGE_CORRECTION_DISABLE;
+
 	if (fb->modifier == I915_FORMAT_MOD_X_TILED)
 		sprctl |= SPRITE_TILED;
 
@@ -809,6 +813,9 @@ static u32 g4x_sprite_ctl(const struct intel_crtc_state *crtc_state,
 	if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
 		dvscntr |= DVS_YUV_FORMAT_BT709;
 
+	if (plane_state->base.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
+		dvscntr |= DVS_YUV_RANGE_CORRECTION_DISABLE;
+
 	if (fb->modifier == I915_FORMAT_MOD_X_TILED)
 		dvscntr |= DVS_TILED;
 
@@ -1528,7 +1535,8 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 	drm_plane_create_color_properties(&intel_plane->base,
 					  BIT(DRM_COLOR_YCBCR_BT601) |
 					  BIT(DRM_COLOR_YCBCR_BT709),
-					  BIT(DRM_COLOR_YCBCR_LIMITED_RANGE),
+					  BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+					  BIT(DRM_COLOR_YCBCR_FULL_RANGE),
 					  DRM_COLOR_YCBCR_BT709,
 					  DRM_COLOR_YCBCR_LIMITED_RANGE);