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#include <gbm.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <wlr/util/log.h>
#include "backend/drm.h"
#include "backend/drm-util.h"
struct atomic {
drmModeAtomicReq *req;
int cursor;
bool failed;
};
static void atomic_begin(struct wlr_drm_crtc *crtc, struct atomic *atom) {
if (!crtc->atomic) {
crtc->atomic = drmModeAtomicAlloc();
if (!crtc->atomic) {
wlr_log_errno(L_ERROR, "Allocation failed");
atom->failed = true;
return;
}
}
atom->req = crtc->atomic;
atom->cursor = drmModeAtomicGetCursor(atom->req);
atom->failed = false;
}
static bool atomic_end(int drm_fd, struct atomic *atom) {
if (atom->failed) {
return false;
}
uint32_t flags = DRM_MODE_ATOMIC_TEST_ONLY | DRM_MODE_ATOMIC_NONBLOCK;
if (drmModeAtomicCommit(drm_fd, atom->req, flags, NULL)) {
wlr_log_errno(L_ERROR, "Atomic test failed");
drmModeAtomicSetCursor(atom->req, atom->cursor);
return false;
}
return true;
}
static bool atomic_commit(int drm_fd, struct atomic *atom,
struct wlr_drm_output *output, uint32_t flag, bool modeset) {
if (atom->failed) {
return false;
}
uint32_t flags = DRM_MODE_PAGE_FLIP_EVENT | flag;
int ret = drmModeAtomicCommit(drm_fd, atom->req, flags, output);
if (ret) {
wlr_log_errno(L_ERROR, "%s: Atomic commit failed (%s)",
output->output.name, modeset ? "modeset" : "pageflip");
// Try to commit without new changes
drmModeAtomicSetCursor(atom->req, atom->cursor);
ret = drmModeAtomicCommit(drm_fd, atom->req, flags, output);
if (ret) {
wlr_log_errno(L_ERROR, "%s: Atomic commit failed (%s)",
output->output.name, modeset ? "modeset" : "pageflip");
}
}
drmModeAtomicSetCursor(atom->req, 0);
return !ret;
}
static inline void atomic_add(struct atomic *atom, uint32_t id, uint32_t prop, uint64_t val) {
if (!atom->failed && drmModeAtomicAddProperty(atom->req, id, prop, val) < 0) {
wlr_log_errno(L_ERROR, "Failed to add atomic DRM property");
atom->failed = true;
}
}
static void set_plane_props(struct atomic *atom, struct wlr_drm_plane *plane,
uint32_t crtc_id, uint32_t fb_id, bool set_crtc_xy) {
uint32_t id = plane->id;
const union wlr_drm_plane_props *props = &plane->props;
// The src_* properties are in 16.16 fixed point
atomic_add(atom, id, props->src_x, 0);
atomic_add(atom, id, props->src_y, 0);
atomic_add(atom, id, props->src_w, plane->width << 16);
atomic_add(atom, id, props->src_h, plane->height << 16);
atomic_add(atom, id, props->crtc_w, plane->width);
atomic_add(atom, id, props->crtc_h, plane->height);
atomic_add(atom, id, props->fb_id, fb_id);
atomic_add(atom, id, props->crtc_id, crtc_id);
if (set_crtc_xy) {
atomic_add(atom, id, props->crtc_x, 0);
atomic_add(atom, id, props->crtc_y, 0);
}
}
static bool atomic_crtc_pageflip(struct wlr_drm_backend *backend,
struct wlr_drm_output *output,
struct wlr_drm_crtc *crtc,
uint32_t fb_id, drmModeModeInfo *mode) {
if (mode) {
if (crtc->mode_id) {
drmModeDestroyPropertyBlob(backend->fd, crtc->mode_id);
}
if (drmModeCreatePropertyBlob(backend->fd, mode, sizeof(*mode), &crtc->mode_id)) {
wlr_log_errno(L_ERROR, "Unable to create property blob");
return false;
}
}
struct atomic atom;
atomic_begin(crtc, &atom);
atomic_add(&atom, output->connector, output->props.crtc_id, crtc->id);
atomic_add(&atom, crtc->id, crtc->props.mode_id, crtc->mode_id);
atomic_add(&atom, crtc->id, crtc->props.active, 1);
set_plane_props(&atom, crtc->primary, crtc->id, fb_id, true);
return atomic_commit(backend->fd, &atom, output,
mode ? DRM_MODE_ATOMIC_ALLOW_MODESET : DRM_MODE_ATOMIC_NONBLOCK,
mode);
}
static void atomic_conn_enable(struct wlr_drm_backend *backend,
struct wlr_drm_output *output, bool enable) {
struct wlr_drm_crtc *crtc = output->crtc;
struct atomic atom;
atomic_begin(crtc, &atom);
atomic_add(&atom, crtc->id, crtc->props.active, enable);
atomic_end(backend->fd, &atom);
}
bool legacy_crtc_set_cursor(struct wlr_drm_backend *backend,
struct wlr_drm_crtc *crtc, struct gbm_bo *bo);
static bool atomic_crtc_set_cursor(struct wlr_drm_backend *backend,
struct wlr_drm_crtc *crtc, struct gbm_bo *bo) {
if (!crtc || !crtc->cursor) {
return true;
}
struct wlr_drm_plane *plane = crtc->cursor;
// We can't use atomic operations on fake planes
if (plane->id == 0) {
return legacy_crtc_set_cursor(backend, crtc, bo);
}
struct atomic atom;
atomic_begin(crtc, &atom);
if (bo) {
set_plane_props(&atom, plane, crtc->id, get_fb_for_bo(bo), false);
} else {
atomic_add(&atom, plane->id, plane->props.fb_id, 0);
atomic_add(&atom, plane->id, plane->props.crtc_id, 0);
}
return atomic_end(backend->fd, &atom);
}
bool legacy_crtc_move_cursor(struct wlr_drm_backend *backend,
struct wlr_drm_crtc *crtc, int x, int y);
static bool atomic_crtc_move_cursor(struct wlr_drm_backend *backend,
struct wlr_drm_crtc *crtc, int x, int y) {
struct wlr_drm_plane *plane = crtc->cursor;
// We can't use atomic operations on fake planes
if (plane->id == 0) {
return legacy_crtc_move_cursor(backend, crtc, x, y);
}
struct atomic atom;
atomic_begin(crtc, &atom);
atomic_add(&atom, plane->id, plane->props.crtc_x, x);
atomic_add(&atom, plane->id, plane->props.crtc_y, y);
return atomic_end(backend->fd, &atom);
}
const struct wlr_drm_interface atomic_iface = {
.conn_enable = atomic_conn_enable,
.crtc_pageflip = atomic_crtc_pageflip,
.crtc_set_cursor = atomic_crtc_set_cursor,
.crtc_move_cursor = atomic_crtc_move_cursor,
};
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