[RFC 14/33] drm/i915/color: Add lut range for SDR planes

[Uma Shankar]

Add lut range information for SDR planes. This is used to
hint the userspace what kind of LUT values are needed by
the hardware block. Pre-CSC and Post-CSC blocks have similar
lut range for HDR planes.

Co-developed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
Signed-off-by: Uma Shankar <uma.shankar at intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c | 55 ++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 5918e2e9bcdd..3900e3748a0e 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -3778,6 +3778,61 @@ static const struct intel_color_funcs ilk_color_funcs = {
 	.get_config = ilk_get_config,
 };
 
+/* FIXME input bpc? */
+static const struct drm_color_lut_range xelpd_pre_post_csc_sdr[] = {
+	/* segment 1 */
+	{
+		.flags = (DRM_MODE_LUT_POST_CSC |
+			  DRM_MODE_LUT_PRE_CSC |
+			  DRM_MODE_LUT_REFLECT_NEGATIVE |
+			  DRM_MODE_LUT_INTERPOLATE |
+			  DRM_MODE_LUT_NON_DECREASING),
+		.count = 32,
+		.input_bpc = 16, .output_bpc = 16,
+		.start = 0, .end = (1 << 16) - (1 << 16) / 33,
+		.min = 0, .max = (1 << 16) - 1,
+	},
+	/* segment 2 */
+	{
+		.flags = (DRM_MODE_LUT_POST_CSC |
+			  DRM_MODE_LUT_PRE_CSC |
+			  DRM_MODE_LUT_REFLECT_NEGATIVE |
+			  DRM_MODE_LUT_INTERPOLATE |
+			  DRM_MODE_LUT_REUSE_LAST |
+			  DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 16, .output_bpc = 16,
+		.start = (1 << 16) - (1 << 16) / 33, .end = 1 << 16,
+		.min = 0, .max = 1 << 16,
+	},
+	/* Segment 3 */
+	{
+		.flags = (DRM_MODE_LUT_POST_CSC |
+			  DRM_MODE_LUT_PRE_CSC |
+			  DRM_MODE_LUT_REFLECT_NEGATIVE |
+			  DRM_MODE_LUT_INTERPOLATE |
+			  DRM_MODE_LUT_REUSE_LAST |
+			  DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 16, .output_bpc = 16,
+		.start = 1 << 16, .end = 3 << 16,
+		.min = 0, .max = (8 << 16) - 1,
+	},
+	/* Segment 4 */
+	{
+		.flags = (DRM_MODE_LUT_POST_CSC |
+			  DRM_MODE_LUT_PRE_CSC |
+			  DRM_MODE_LUT_REFLECT_NEGATIVE |
+			  DRM_MODE_LUT_INTERPOLATE |
+			  DRM_MODE_LUT_REUSE_LAST |
+			  DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 16, .output_bpc = 16,
+		.start = 3 << 16, .end = 7 << 16,
+		.min = 0, .max = (8 << 16) - 1,
+	},
+};
+
 void intel_color_crtc_init(struct intel_crtc *crtc)
 {
 	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
-- 
2.38.1