[igt-dev] [PATCH i-g-t v2 1/9] tests/kms_color: Use legacy LUT for chopping off the lsbs

[Ville Syrjala <ville.syrjala@linux.intel.com>]

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

Trying to use an interpolated gamma mode (as is the case currently
on eg. icl/tgl) for chopping off the lsbs doesn't really work. Use
the legacy LUT instead. Also get rid of the degamma LUT as that
can't even be enabled alognside the legacy LUT on split gamma i915
platforms (ivb-skl).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 tests/kms_color.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/tests/kms_color.c b/tests/kms_color.c
index cd03c1354c0a..369dc8057d83 100644
--- a/tests/kms_color.c
+++ b/tests/kms_color.c
@@ -504,13 +504,10 @@ static bool test_pipe_ctm(data_t *data,
 	 * rounding issues and inaccuracies leading to crc mismatch.
 	 */
 	if (is_i915_device(data->drm_fd) && memcmp(before, after, sizeof(color_t))) {
-		igt_require(igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_DEGAMMA_LUT));
 		igt_require(igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_GAMMA_LUT));
 
-		degamma_linear = generate_table(data->degamma_lut_size, 1.0);
-		gamma_linear = generate_table(data->gamma_lut_size, 1.0);
+		gamma_linear = generate_table(256, 1.0);
 
-		set_degamma(data, primary->pipe, degamma_linear);
 		set_gamma(data, primary->pipe, gamma_linear);
 	}
 
-- 
2.39.2