[Intel-gfx] [RFC v2 05/22] drm/i915/xelpd: Define Degamma Lut range struct for HDR planes

Uma Shankar
2021-09-06T21:01:29Z

Define the structure with XE_LPD degamma lut ranges. HDR and SDR
planes have different capabilities, implemented respective
structure for the HDR planes.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
---
drivers/gpu/drm/i915/display/intel_color.c | 52 ++++++++++++++++++++++
1 file changed, 52 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index afcb4bf3826c..6403bd74324b 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -2092,6 +2092,58 @@ static void icl_read_luts(struct intel_crtc_state *crtc_state)
}
}

+ /* FIXME input bpc? */
+__maybe_unused
+static const struct drm_color_lut_range d13_degamma_hdr[] = {
+ /* segment 1 */
+ {
+ .flags = (DRM_MODE_LUT_GAMMA |
+ DRM_MODE_LUT_REFLECT_NEGATIVE |
+ DRM_MODE_LUT_INTERPOLATE |
+ DRM_MODE_LUT_NON_DECREASING),
+ .count = 128,
+ .input_bpc = 24, .output_bpc = 16,
+ .start = 0, .end = (1 << 24) - 1,
+ .min = 0, .max = (1 << 24) - 1,
+ },
+ /* segment 2 */
+ {
+ .flags = (DRM_MODE_LUT_GAMMA |
+ DRM_MODE_LUT_REFLECT_NEGATIVE |
+ DRM_MODE_LUT_INTERPOLATE |
+ DRM_MODE_LUT_REUSE_LAST |
+ DRM_MODE_LUT_NON_DECREASING),
+ .count = 1,
+ .input_bpc = 24, .output_bpc = 16,
+ .start = (1 << 24) - 1, .end = 1 << 24,
+ .min = 0, .max = (1 << 27) - 1,
+ },
+ /* Segment 3 */
+ {
+ .flags = (DRM_MODE_LUT_GAMMA |
+ DRM_MODE_LUT_REFLECT_NEGATIVE |
+ DRM_MODE_LUT_INTERPOLATE |
+ DRM_MODE_LUT_REUSE_LAST |
+ DRM_MODE_LUT_NON_DECREASING),
+ .count = 1,
+ .input_bpc = 24, .output_bpc = 16,
+ .start = 1 << 24, .end = 3 << 24,
+ .min = 0, .max = (1 << 27) - 1,
+ },
+ /* Segment 4 */
+ {
+ .flags = (DRM_MODE_LUT_GAMMA |
+ DRM_MODE_LUT_REFLECT_NEGATIVE |
+ DRM_MODE_LUT_INTERPOLATE |
+ DRM_MODE_LUT_REUSE_LAST |
+ DRM_MODE_LUT_NON_DECREASING),
+ .count = 1,
+ .input_bpc = 24, .output_bpc = 16,
+ .start = 3 << 24, .end = 7 << 24,
+ .min = 0, .max = (1 << 27) - 1,
+ },
+};
+
void intel_color_init(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
--
2.26.2