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output: make wlr_output_set_gamma atomic

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wlr_output_set_gamma is now double-buffered and applies the gamma LUT on
the next output commit.
This commit is contained in:
Simon Ser 2020-05-14 18:27:02 +02:00 • committed by Drew DeVault
parent 7693fdb8a7
commit 347bdb6d9a
9 changed files with 100 additions and 105 deletions
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30
backend/drm/atomic.c
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@ -71,23 +71,21 @@ static bool create_mode_blob(struct wlr_drm_backend *drm,
}
static bool create_gamma_lut_blob(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, uint32_t *blob_id) {
if (crtc->gamma_table_size == 0) {
size_t size, const uint16_t *lut, uint32_t *blob_id) {
if (size == 0) {
*blob_id = 0;
return true;
}
uint32_t size = crtc->gamma_table_size;
uint16_t *r = crtc->gamma_table;
uint16_t *g = crtc->gamma_table + size;
uint16_t *b = crtc->gamma_table + 2 * size;
struct drm_color_lut *gamma = malloc(size * sizeof(struct drm_color_lut));
if (gamma == NULL) {
wlr_log(WLR_ERROR, "Failed to allocate gamma table");
return false;
}
const uint16_t *r = lut;
const uint16_t *g = lut + size;
const uint16_t *b = lut + 2 * size;
for (size_t i = 0; i < size; i++) {
gamma[i].red = r[i];
gamma[i].green = g[i];
@ -96,7 +94,7 @@ static bool create_gamma_lut_blob(struct wlr_drm_backend *drm,
if (drmModeCreatePropertyBlob(drm->fd, gamma,
size * sizeof(struct drm_color_lut), blob_id) != 0) {
wlr_log_errno(WLR_ERROR, "Unable to create property blob");
wlr_log_errno(WLR_ERROR, "Unable to create gamma LUT property blob");
free(gamma);
return false;
}
@ -148,6 +146,7 @@ error:
static bool atomic_crtc_commit(struct wlr_drm_backend *drm,
struct wlr_drm_connector *conn, uint32_t flags) {
struct wlr_output *output = &conn->output;
struct wlr_drm_crtc *crtc = conn->crtc;
if (crtc->pending & WLR_DRM_CRTC_MODE) {
@ -160,11 +159,14 @@ static bool atomic_crtc_commit(struct wlr_drm_backend *drm,
}
}
if (crtc->pending & WLR_DRM_CRTC_GAMMA_LUT) {
// Fallback to legacy gamma interface when gamma properties are not available
// (can happen on older Intel GPUs that support gamma but not degamma).
if (output->pending.committed & WLR_OUTPUT_STATE_GAMMA_LUT) {
// Fallback to legacy gamma interface when gamma properties are not
// available (can happen on older Intel GPUs that support gamma but not
// degamma).
if (crtc->props.gamma_lut == 0) {
if (!drm_legacy_crtc_set_gamma(drm, crtc)) {
if (!drm_legacy_crtc_set_gamma(drm, crtc,
output->pending.gamma_lut_size,
output->pending.gamma_lut)) {
return false;
}
} else {
@ -172,7 +174,9 @@ static bool atomic_crtc_commit(struct wlr_drm_backend *drm,
drmModeDestroyPropertyBlob(drm->fd, crtc->gamma_lut);
}
if (!create_gamma_lut_blob(drm, crtc, &crtc->gamma_lut)) {
wlr_log(WLR_ERROR, "setting gamma LUT %zu", output->pending.gamma_lut_size);
if (!create_gamma_lut_blob(drm, output->pending.gamma_lut_size,
output->pending.gamma_lut, &crtc->gamma_lut)) {
return false;
}
}