[Intel-gfx] [PATCH 15/20] drm/i915: Make ilk_load_luts() deal with degamma

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Make ilk_load_luts() ready for a degamma lut. Currently we never
have one, but soon we may get one from readout, and I think we
may want to change the state computation such that we may end up
with one even when userspace has simply supplied a gamma lut.

At least the code now follows the path laid out by the ivb/bdw
counterpars.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index d5ce58c3bc11..12a41fb4a98c 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -637,13 +637,15 @@ static void ilk_load_luts(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	const struct drm_property_blob *gamma_lut = crtc_state->hw.gamma_lut;
+	const struct drm_property_blob *degamma_lut = crtc_state->hw.degamma_lut;
+	const struct drm_property_blob *blob = gamma_lut ?: degamma_lut;
 
 	switch (crtc_state->gamma_mode) {
 	case GAMMA_MODE_MODE_8BIT:
-		ilk_load_lut_8(crtc, gamma_lut);
+		ilk_load_lut_8(crtc, blob);
 		break;
 	case GAMMA_MODE_MODE_10BIT:
-		ilk_load_lut_10(crtc, gamma_lut);
+		ilk_load_lut_10(crtc, blob);
 		break;
 	default:
 		MISSING_CASE(crtc_state->gamma_mode);
-- 
2.26.2