271 lines
7.3 KiB
C
271 lines
7.3 KiB
C
#include <gbm.h>
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#include <stdlib.h>
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#include <wlr/util/log.h>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include "backend/drm/drm.h"
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#include "backend/drm/iface.h"
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#include "backend/drm/util.h"
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struct atomic {
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drmModeAtomicReq *req;
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bool failed;
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};
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static void atomic_begin(struct atomic *atom) {
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memset(atom, 0, sizeof(*atom));
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atom->req = drmModeAtomicAlloc();
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if (!atom->req) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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atom->failed = true;
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return;
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}
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}
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static bool atomic_commit(struct atomic *atom,
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struct wlr_drm_connector *conn, uint32_t flags) {
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struct wlr_drm_backend *drm = conn->backend;
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if (atom->failed) {
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return false;
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}
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int ret = drmModeAtomicCommit(drm->fd, atom->req, flags, drm);
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if (ret) {
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wlr_log_errno(WLR_ERROR, "%s: Atomic %s failed (%s)",
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conn->name,
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(flags & DRM_MODE_ATOMIC_TEST_ONLY) ? "test" : "commit",
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(flags & DRM_MODE_ATOMIC_ALLOW_MODESET) ? "modeset" : "pageflip");
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return false;
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}
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return true;
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}
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static void atomic_finish(struct atomic *atom) {
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drmModeAtomicFree(atom->req);
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}
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static void atomic_add(struct atomic *atom, uint32_t id, uint32_t prop, uint64_t val) {
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if (!atom->failed && drmModeAtomicAddProperty(atom->req, id, prop, val) < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to add atomic DRM property");
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atom->failed = true;
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}
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}
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static bool create_mode_blob(struct wlr_drm_backend *drm,
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struct wlr_drm_crtc *crtc, uint32_t *blob_id) {
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if (!crtc->pending.active) {
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*blob_id = 0;
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return true;
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}
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if (drmModeCreatePropertyBlob(drm->fd, &crtc->pending.mode->drm_mode,
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sizeof(drmModeModeInfo), blob_id)) {
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wlr_log_errno(WLR_ERROR, "Unable to create mode property blob");
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return false;
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}
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return true;
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}
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static bool create_gamma_lut_blob(struct wlr_drm_backend *drm,
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size_t size, const uint16_t *lut, uint32_t *blob_id) {
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if (size == 0) {
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*blob_id = 0;
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return true;
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}
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struct drm_color_lut *gamma = malloc(size * sizeof(struct drm_color_lut));
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if (gamma == NULL) {
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wlr_log(WLR_ERROR, "Failed to allocate gamma table");
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return false;
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}
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const uint16_t *r = lut;
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const uint16_t *g = lut + size;
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const uint16_t *b = lut + 2 * size;
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for (size_t i = 0; i < size; i++) {
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gamma[i].red = r[i];
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gamma[i].green = g[i];
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gamma[i].blue = b[i];
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}
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if (drmModeCreatePropertyBlob(drm->fd, gamma,
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size * sizeof(struct drm_color_lut), blob_id) != 0) {
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wlr_log_errno(WLR_ERROR, "Unable to create gamma LUT property blob");
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free(gamma);
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return false;
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}
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free(gamma);
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return true;
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}
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static void commit_blob(struct wlr_drm_backend *drm,
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uint32_t *current, uint32_t next) {
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if (*current == next) {
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return;
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}
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if (*current != 0) {
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drmModeDestroyPropertyBlob(drm->fd, *current);
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}
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*current = next;
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}
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static void rollback_blob(struct wlr_drm_backend *drm,
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uint32_t *current, uint32_t next) {
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if (*current == next) {
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return;
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}
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if (next != 0) {
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drmModeDestroyPropertyBlob(drm->fd, next);
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}
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}
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static void plane_disable(struct atomic *atom, struct wlr_drm_plane *plane) {
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uint32_t id = plane->id;
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const union wlr_drm_plane_props *props = &plane->props;
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atomic_add(atom, id, props->fb_id, 0);
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atomic_add(atom, id, props->crtc_id, 0);
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}
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static void set_plane_props(struct atomic *atom, struct wlr_drm_backend *drm,
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struct wlr_drm_plane *plane, uint32_t crtc_id, int32_t x, int32_t y) {
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uint32_t id = plane->id;
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const union wlr_drm_plane_props *props = &plane->props;
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struct wlr_drm_fb *fb = plane_get_next_fb(plane);
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struct gbm_bo *bo = drm_fb_acquire(fb, drm, &plane->mgpu_surf);
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if (!bo) {
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goto error;
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}
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uint32_t fb_id = get_fb_for_bo(bo, drm->addfb2_modifiers);
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if (!fb_id) {
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goto error;
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}
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// The src_* properties are in 16.16 fixed point
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atomic_add(atom, id, props->src_x, 0);
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atomic_add(atom, id, props->src_y, 0);
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atomic_add(atom, id, props->src_w, (uint64_t)plane->surf.width << 16);
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atomic_add(atom, id, props->src_h, (uint64_t)plane->surf.height << 16);
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atomic_add(atom, id, props->crtc_w, plane->surf.width);
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atomic_add(atom, id, props->crtc_h, plane->surf.height);
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atomic_add(atom, id, props->fb_id, fb_id);
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atomic_add(atom, id, props->crtc_id, crtc_id);
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atomic_add(atom, id, props->crtc_x, (uint64_t)x);
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atomic_add(atom, id, props->crtc_y, (uint64_t)y);
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return;
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error:
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wlr_log(WLR_ERROR, "Failed to set plane %"PRIu32" properties", plane->id);
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atom->failed = true;
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}
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static bool atomic_crtc_commit(struct wlr_drm_backend *drm,
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struct wlr_drm_connector *conn, uint32_t flags) {
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struct wlr_output *output = &conn->output;
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struct wlr_drm_crtc *crtc = conn->crtc;
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uint32_t mode_id = crtc->mode_id;
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if (crtc->pending_modeset) {
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if (!create_mode_blob(drm, crtc, &mode_id)) {
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return false;
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}
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}
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uint32_t gamma_lut = crtc->gamma_lut;
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if (output->pending.committed & WLR_OUTPUT_STATE_GAMMA_LUT) {
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// Fallback to legacy gamma interface when gamma properties are not
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// available (can happen on older Intel GPUs that support gamma but not
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// degamma).
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if (crtc->props.gamma_lut == 0) {
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if (!drm_legacy_crtc_set_gamma(drm, crtc,
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output->pending.gamma_lut_size,
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output->pending.gamma_lut)) {
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return false;
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}
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} else {
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if (!create_gamma_lut_blob(drm, output->pending.gamma_lut_size,
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output->pending.gamma_lut, &gamma_lut)) {
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return false;
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}
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}
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}
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bool prev_vrr_enabled =
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output->adaptive_sync_status == WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED;
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bool vrr_enabled = prev_vrr_enabled;
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if ((output->pending.committed & WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED) &&
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drm_connector_supports_vrr(conn)) {
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vrr_enabled = output->pending.adaptive_sync_enabled;
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}
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if (crtc->pending_modeset) {
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flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
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} else {
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flags |= DRM_MODE_ATOMIC_NONBLOCK;
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}
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struct atomic atom;
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atomic_begin(&atom);
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atomic_add(&atom, conn->id, conn->props.crtc_id,
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crtc->pending.active ? crtc->id : 0);
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if (crtc->pending_modeset && crtc->pending.active &&
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conn->props.link_status != 0) {
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atomic_add(&atom, conn->id, conn->props.link_status,
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DRM_MODE_LINK_STATUS_GOOD);
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}
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atomic_add(&atom, crtc->id, crtc->props.mode_id, mode_id);
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atomic_add(&atom, crtc->id, crtc->props.active, crtc->pending.active);
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if (crtc->pending.active) {
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if (crtc->props.gamma_lut != 0) {
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atomic_add(&atom, crtc->id, crtc->props.gamma_lut, gamma_lut);
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}
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if (crtc->props.vrr_enabled != 0) {
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atomic_add(&atom, crtc->id, crtc->props.vrr_enabled, vrr_enabled);
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}
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set_plane_props(&atom, drm, crtc->primary, crtc->id, 0, 0);
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if (crtc->cursor) {
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if (drm_connector_is_cursor_visible(conn)) {
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set_plane_props(&atom, drm, crtc->cursor, crtc->id,
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conn->cursor_x, conn->cursor_y);
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} else {
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plane_disable(&atom, crtc->cursor);
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}
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}
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} else {
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plane_disable(&atom, crtc->primary);
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if (crtc->cursor) {
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plane_disable(&atom, crtc->cursor);
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}
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}
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bool ok = atomic_commit(&atom, conn, flags);
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atomic_finish(&atom);
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if (ok && !(flags & DRM_MODE_ATOMIC_TEST_ONLY)) {
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commit_blob(drm, &crtc->mode_id, mode_id);
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commit_blob(drm, &crtc->gamma_lut, gamma_lut);
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if (vrr_enabled != prev_vrr_enabled) {
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output->adaptive_sync_status = vrr_enabled ?
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WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED :
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WLR_OUTPUT_ADAPTIVE_SYNC_DISABLED;
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wlr_log(WLR_DEBUG, "VRR %s on connector '%s'",
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vrr_enabled ? "enabled" : "disabled", output->name);
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}
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} else {
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rollback_blob(drm, &crtc->mode_id, mode_id);
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rollback_blob(drm, &crtc->gamma_lut, gamma_lut);
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}
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return ok;
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}
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const struct wlr_drm_interface atomic_iface = {
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.crtc_commit = atomic_crtc_commit,
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};
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