From 347bdb6d9a8064e32adbfac5413c9c81fc49109b Mon Sep 17 00:00:00 2001 From: Simon Ser Date: Thu, 14 May 2020 18:27:02 +0200 Subject: output: make wlr_output_set_gamma atomic wlr_output_set_gamma is now double-buffered and applies the gamma LUT on the next output commit. --- backend/drm/atomic.c | 30 +++++++++++++---------- backend/drm/drm.c | 67 +++++++--------------------------------------------- backend/drm/legacy.c | 45 ++++++++++++++++++++++++++++------- 3 files changed, 61 insertions(+), 81 deletions(-) (limited to 'backend') diff --git a/backend/drm/atomic.c b/backend/drm/atomic.c index f58a5b72..31145504 100644 --- a/backend/drm/atomic.c +++ b/backend/drm/atomic.c @@ -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; } } diff --git a/backend/drm/drm.c b/backend/drm/drm.c index d0f7a69e..45e459d1 100644 --- a/backend/drm/drm.c +++ b/backend/drm/drm.c @@ -305,8 +305,6 @@ void finish_drm_resources(struct wlr_drm_backend *drm) { drmModeDestroyPropertyBlob(drm->fd, crtc->gamma_lut); } - free(crtc->gamma_table); - if (crtc->primary) { wlr_drm_format_set_finish(&crtc->primary->formats); free(crtc->primary); @@ -568,24 +566,8 @@ static void drm_connector_rollback(struct wlr_output *output) { wlr_egl_make_current(&drm->renderer.egl, EGL_NO_SURFACE, NULL); } -static void fill_empty_gamma_table(size_t size, - uint16_t *r, uint16_t *g, uint16_t *b) { - assert(0xFFFF < UINT64_MAX / (size - 1)); - for (uint32_t i = 0; i < size; ++i) { - uint16_t val = (uint64_t)0xffff * i / (size - 1); - r[i] = g[i] = b[i] = val; - } -} - -static size_t drm_connector_get_gamma_size(struct wlr_output *output) { - struct wlr_drm_connector *conn = get_drm_connector_from_output(output); - struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend); - struct wlr_drm_crtc *crtc = conn->crtc; - - if (crtc == NULL) { - return 0; - } - +size_t drm_crtc_get_gamma_lut_size(struct wlr_drm_backend *drm, + struct wlr_drm_crtc *crtc) { if (crtc->props.gamma_lut_size == 0) { return (size_t)crtc->legacy_crtc->gamma_size; } @@ -600,47 +582,16 @@ static size_t drm_connector_get_gamma_size(struct wlr_output *output) { return gamma_lut_size; } -bool set_drm_connector_gamma(struct wlr_output *output, size_t size, - const uint16_t *r, const uint16_t *g, const uint16_t *b) { +static size_t drm_connector_get_gamma_size(struct wlr_output *output) { struct wlr_drm_connector *conn = get_drm_connector_from_output(output); + struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend); + struct wlr_drm_crtc *crtc = conn->crtc; - if (!conn->crtc) { - return false; - } - - bool reset = false; - if (size == 0) { - reset = true; - size = drm_connector_get_gamma_size(output); - if (size == 0) { - return false; - } - } - - uint16_t *gamma_table = malloc(3 * size * sizeof(uint16_t)); - if (gamma_table == NULL) { - wlr_log(WLR_ERROR, "Failed to allocate gamma table"); - return false; - } - uint16_t *_r = gamma_table; - uint16_t *_g = gamma_table + size; - uint16_t *_b = gamma_table + 2 * size; - - if (reset) { - fill_empty_gamma_table(size, _r, _g, _b); - } else { - memcpy(_r, r, size * sizeof(uint16_t)); - memcpy(_g, g, size * sizeof(uint16_t)); - memcpy(_b, b, size * sizeof(uint16_t)); + if (crtc == NULL) { + return 0; } - conn->crtc->pending |= WLR_DRM_CRTC_GAMMA_LUT; - free(conn->crtc->gamma_table); - conn->crtc->gamma_table = gamma_table; - conn->crtc->gamma_table_size = size; - - wlr_output_update_needs_frame(output); - return true; // will be applied on next page-flip + return drm_crtc_get_gamma_lut_size(drm, crtc); } static bool drm_connector_export_dmabuf(struct wlr_output *output, @@ -1082,7 +1033,6 @@ static const struct wlr_output_impl output_impl = { .test = drm_connector_test, .commit = drm_connector_commit, .rollback = drm_connector_rollback, - .set_gamma = set_drm_connector_gamma, .get_gamma_size = drm_connector_get_gamma_size, .export_dmabuf = drm_connector_export_dmabuf, }; @@ -1117,7 +1067,6 @@ static void dealloc_crtc(struct wlr_drm_connector *conn) { wlr_log(WLR_DEBUG, "De-allocating CRTC %zu for output '%s'", conn->crtc - drm->crtcs, conn->output.name); - set_drm_connector_gamma(&conn->output, 0, NULL, NULL, NULL); enable_drm_connector(&conn->output, false); drm_plane_finish_surface(conn->crtc->primary); drm_plane_finish_surface(conn->crtc->cursor); diff --git a/backend/drm/legacy.c b/backend/drm/legacy.c index c32d0399..d708e2b3 100644 --- a/backend/drm/legacy.c +++ b/backend/drm/legacy.c @@ -1,4 +1,6 @@ +#include #include +#include #include #include #include @@ -8,6 +10,7 @@ static bool legacy_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; struct wlr_drm_plane *cursor = crtc->cursor; @@ -50,8 +53,9 @@ static bool legacy_crtc_commit(struct wlr_drm_backend *drm, } } - if (crtc->pending & WLR_DRM_CRTC_GAMMA_LUT) { - if (!drm_legacy_crtc_set_gamma(drm, crtc)) { + if (output->pending.committed & WLR_OUTPUT_STATE_GAMMA_LUT) { + if (!drm_legacy_crtc_set_gamma(drm, crtc, + output->pending.gamma_lut_size, output->pending.gamma_lut)) { return false; } } @@ -99,21 +103,44 @@ static bool legacy_crtc_commit(struct wlr_drm_backend *drm, return true; } +static void fill_empty_gamma_table(size_t size, + uint16_t *r, uint16_t *g, uint16_t *b) { + assert(0xFFFF < UINT64_MAX / (size - 1)); + for (uint32_t i = 0; i < size; ++i) { + uint16_t val = (uint64_t)0xFFFF * i / (size - 1); + r[i] = g[i] = b[i] = val; + } +} + bool drm_legacy_crtc_set_gamma(struct wlr_drm_backend *drm, - struct wlr_drm_crtc *crtc) { - uint32_t size = crtc->gamma_table_size; - uint16_t *r = NULL, *g = NULL, *b = NULL; - if (size > 0) { - r = crtc->gamma_table; - g = crtc->gamma_table + crtc->gamma_table_size; - b = crtc->gamma_table + 2 * crtc->gamma_table_size; + struct wlr_drm_crtc *crtc, size_t size, uint16_t *lut) { + uint16_t *linear_lut = NULL; + if (size == 0) { + // The legacy interface doesn't offer a way to reset the gamma LUT + size = drm_crtc_get_gamma_lut_size(drm, crtc); + if (size == 0) { + return false; + } + + linear_lut = malloc(3 * size * sizeof(uint16_t)); + if (linear_lut == NULL) { + wlr_log_errno(WLR_ERROR, "Allocation failed"); + return false; + } + fill_empty_gamma_table(size, linear_lut, linear_lut + size, + linear_lut + 2 * size); + + lut = linear_lut; } + uint16_t *r = lut, *g = lut + size, *b = lut + 2 * size; if (drmModeCrtcSetGamma(drm->fd, crtc->id, size, r, g, b) != 0) { wlr_log_errno(WLR_ERROR, "Failed to set gamma LUT on CRTC %"PRIu32, crtc->id); return false; } + + free(linear_lut); return true; } -- cgit v1.2.3