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backend-drm: reset CRTC_DEGAMMA_LUT

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We are assuming that CRTC_DEGAMMA_LUT is pass-through, so better ensure
it really is pass-through rather than whatever the previous KMS client
left there.

This too falls under deprecated_gamma_is_set check, because the legacy
gamma could use either GAMMA or DEGAMMA.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This commit is contained in:
Pekka Paalanen 2022-07-01 15:34:14 +03:00 committed by Daniel Stone
parent 1acf69ac2f
commit d1ca5f71ee
2 changed files with 6 additions and 0 deletions
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2
libweston/backend-drm/drm-internal.h
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@ -236,6 +236,8 @@ enum wdrm_content_type {
enum wdrm_crtc_property {
WDRM_CRTC_MODE_ID = 0,
WDRM_CRTC_ACTIVE,
WDRM_CRTC_DEGAMMA_LUT,
WDRM_CRTC_DEGAMMA_LUT_SIZE,
WDRM_CRTC_GAMMA_LUT,
WDRM_CRTC_GAMMA_LUT_SIZE,
WDRM_CRTC__COUNT

4
libweston/backend-drm/kms.c
View File

@ -165,6 +165,8 @@ const struct drm_property_info connector_props[] = {
const struct drm_property_info crtc_props[] = {
[WDRM_CRTC_MODE_ID] = { .name = "MODE_ID", },
[WDRM_CRTC_ACTIVE] = { .name = "ACTIVE", },
[WDRM_CRTC_DEGAMMA_LUT] = { .name = "DEGAMMA_LUT", },
[WDRM_CRTC_DEGAMMA_LUT_SIZE] = { .name = "DEGAMMA_LUT_SIZE", },
[WDRM_CRTC_GAMMA_LUT] = { .name = "GAMMA_LUT", },
[WDRM_CRTC_GAMMA_LUT_SIZE] = { .name = "GAMMA_LUT_SIZE", },
};
@ -1079,6 +1081,8 @@ drm_output_apply_state_atomic(struct drm_output_state *state,
if (!output->deprecated_gamma_is_set) {
ret |= crtc_add_prop_zero_ok(req, crtc,
WDRM_CRTC_GAMMA_LUT, 0);
ret |= crtc_add_prop_zero_ok(req, crtc,
WDRM_CRTC_DEGAMMA_LUT, 0);
}
/* No need for the DPMS property, since it is implicit in