diff options
Diffstat (limited to 'backend/drm/atomic.c')
| -rw-r--r-- | backend/drm/atomic.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/backend/drm/atomic.c b/backend/drm/atomic.c new file mode 100644 index 00000000..e7374a00 --- /dev/null +++ b/backend/drm/atomic.c @@ -0,0 +1,189 @@ +#include <gbm.h> +#include <xf86drm.h> +#include <xf86drmMode.h> +#include <wlr/util/log.h> +#include "backend/drm/drm.h" +#include "backend/drm/iface.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_connector *conn, 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, conn); + if (ret) { + wlr_log_errno(L_ERROR, "%s: Atomic commit failed (%s)", + conn->output.name, modeset ? "modeset" : "pageflip"); + + // Try to commit without new changes + drmModeAtomicSetCursor(atom->req, atom->cursor); + if (drmModeAtomicCommit(drm_fd, atom->req, flags, conn)) { + wlr_log_errno(L_ERROR, "%s: Atomic commit failed (%s)", + conn->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->surf.width << 16); + atomic_add(atom, id, props->src_h, plane->surf.height << 16); + atomic_add(atom, id, props->crtc_w, plane->surf.width); + atomic_add(atom, id, props->crtc_h, plane->surf.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 *drm, + struct wlr_drm_connector *conn, + struct wlr_drm_crtc *crtc, + uint32_t fb_id, drmModeModeInfo *mode) { + if (mode) { + if (crtc->mode_id) { + drmModeDestroyPropertyBlob(drm->fd, crtc->mode_id); + } + + if (drmModeCreatePropertyBlob(drm->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, conn->id, conn->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(drm->fd, &atom, conn, + mode ? DRM_MODE_ATOMIC_ALLOW_MODESET : DRM_MODE_ATOMIC_NONBLOCK, + mode); +} + +static void atomic_conn_enable(struct wlr_drm_backend *drm, + struct wlr_drm_connector *conn, bool enable) { + struct wlr_drm_crtc *crtc = conn->crtc; + struct atomic atom; + + atomic_begin(crtc, &atom); + atomic_add(&atom, crtc->id, crtc->props.active, enable); + atomic_end(drm->fd, &atom); +} + +bool legacy_crtc_set_cursor(struct wlr_drm_backend *drm, + struct wlr_drm_crtc *crtc, struct gbm_bo *bo); + +static bool atomic_crtc_set_cursor(struct wlr_drm_backend *drm, + 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(drm, 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(drm->fd, &atom); +} + +bool legacy_crtc_move_cursor(struct wlr_drm_backend *drm, + struct wlr_drm_crtc *crtc, int x, int y); + +static bool atomic_crtc_move_cursor(struct wlr_drm_backend *drm, + 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(drm, 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(drm->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, +}; |