258 lines
7.2 KiB
C
258 lines
7.2 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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int cursor;
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bool failed;
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};
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static void atomic_begin(struct wlr_drm_crtc *crtc, struct atomic *atom) {
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if (!crtc->atomic) {
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crtc->atomic = drmModeAtomicAlloc();
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if (!crtc->atomic) {
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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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atom->req = crtc->atomic;
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atom->cursor = drmModeAtomicGetCursor(atom->req);
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atom->failed = false;
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}
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static bool atomic_end(int drm_fd, uint32_t flags, struct atomic *atom) {
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if (atom->failed) {
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return false;
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}
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flags |= DRM_MODE_ATOMIC_TEST_ONLY;
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if (drmModeAtomicCommit(drm_fd, atom->req, flags, NULL)) {
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wlr_log_errno(WLR_DEBUG, "Atomic test failed");
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drmModeAtomicSetCursor(atom->req, atom->cursor);
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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 atomic_commit(int drm_fd, struct atomic *atom,
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struct wlr_drm_connector *conn, uint32_t flags, bool modeset) {
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struct wlr_drm_backend *drm =
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get_drm_backend_from_backend(conn->output.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 commit failed (%s)",
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conn->output.name, modeset ? "modeset" : "pageflip");
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}
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drmModeAtomicSetCursor(atom->req, 0);
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return !ret;
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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 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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atom->failed = true;
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}
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static bool atomic_crtc_pageflip(struct wlr_drm_backend *drm,
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struct wlr_drm_connector *conn, drmModeModeInfo *mode) {
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struct wlr_drm_crtc *crtc = conn->crtc;
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if (mode != NULL) {
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if (crtc->mode_id != 0) {
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drmModeDestroyPropertyBlob(drm->fd, crtc->mode_id);
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}
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if (drmModeCreatePropertyBlob(drm->fd, mode, sizeof(*mode),
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&crtc->mode_id)) {
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wlr_log_errno(WLR_ERROR, "Unable to create property blob");
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return false;
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}
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}
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uint32_t flags = DRM_MODE_PAGE_FLIP_EVENT;
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if (mode != NULL) {
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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(crtc, &atom);
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atomic_add(&atom, conn->id, conn->props.crtc_id, crtc->id);
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if (mode != NULL && 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, crtc->mode_id);
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atomic_add(&atom, crtc->id, crtc->props.active, 1);
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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 (crtc->cursor->cursor_enabled) {
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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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if (!atomic_end(drm->fd, mode ? DRM_MODE_ATOMIC_ALLOW_MODESET : 0, &atom)) {
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drmModeAtomicSetCursor(atom.req, 0);
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return false;
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}
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if (!atomic_commit(drm->fd, &atom, conn, flags, mode)) {
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return false;
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}
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if (crtc->cursor) {
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drm_fb_move(&crtc->cursor->queued_fb, &crtc->cursor->pending_fb);
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}
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return true;
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}
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static bool atomic_conn_enable(struct wlr_drm_backend *drm,
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struct wlr_drm_connector *conn, bool enable) {
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struct wlr_drm_crtc *crtc = conn->crtc;
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if (crtc == NULL) {
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return !enable;
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}
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struct atomic atom;
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atomic_begin(crtc, &atom);
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atomic_add(&atom, crtc->id, crtc->props.active, enable);
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if (enable) {
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atomic_add(&atom, conn->id, conn->props.crtc_id, crtc->id);
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atomic_add(&atom, crtc->id, crtc->props.mode_id, crtc->mode_id);
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} else {
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atomic_add(&atom, conn->id, conn->props.crtc_id, 0);
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atomic_add(&atom, crtc->id, crtc->props.mode_id, 0);
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}
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return atomic_commit(drm->fd, &atom, conn, DRM_MODE_ATOMIC_ALLOW_MODESET,
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true);
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}
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static bool atomic_crtc_set_cursor(struct wlr_drm_backend *drm,
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struct wlr_drm_crtc *crtc, struct gbm_bo *bo) {
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/* Cursor updates happen when we pageflip */
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return true;
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}
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static bool atomic_crtc_set_gamma(struct wlr_drm_backend *drm,
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struct wlr_drm_crtc *crtc, size_t size,
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uint16_t *r, uint16_t *g, uint16_t *b) {
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// Fallback to legacy gamma interface when gamma properties are not available
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// (can happen on older Intel GPUs that support gamma but not degamma).
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if (crtc->props.gamma_lut == 0) {
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return legacy_iface.crtc_set_gamma(drm, crtc, size, r, g, b);
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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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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 (crtc->gamma_lut != 0) {
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drmModeDestroyPropertyBlob(drm->fd, crtc->gamma_lut);
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}
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if (drmModeCreatePropertyBlob(drm->fd, gamma,
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size * sizeof(struct drm_color_lut), &crtc->gamma_lut)) {
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free(gamma);
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wlr_log_errno(WLR_ERROR, "Unable to create property blob");
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return false;
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}
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free(gamma);
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struct atomic atom;
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atomic_begin(crtc, &atom);
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atomic_add(&atom, crtc->id, crtc->props.gamma_lut, crtc->gamma_lut);
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return atomic_end(drm->fd, 0, &atom);
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}
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static size_t atomic_crtc_get_gamma_size(struct wlr_drm_backend *drm,
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struct wlr_drm_crtc *crtc) {
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if (crtc->props.gamma_lut_size == 0) {
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return legacy_iface.crtc_get_gamma_size(drm, crtc);
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}
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uint64_t gamma_lut_size;
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if (!get_drm_prop(drm->fd, crtc->id, crtc->props.gamma_lut_size,
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&gamma_lut_size)) {
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wlr_log(WLR_ERROR, "Unable to get gamma lut size");
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return 0;
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}
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return (size_t)gamma_lut_size;
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}
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const struct wlr_drm_interface atomic_iface = {
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.conn_enable = atomic_conn_enable,
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.crtc_pageflip = atomic_crtc_pageflip,
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.crtc_set_cursor = atomic_crtc_set_cursor,
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.crtc_set_gamma = atomic_crtc_set_gamma,
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.crtc_get_gamma_size = atomic_crtc_get_gamma_size,
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};
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