wlroots/backend/drm/atomic.c

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#include <stdlib.h>
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#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"
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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 flags, bool modeset) {
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if (atom->failed) {
return false;
}
int ret = drmModeAtomicCommit(drm_fd, atom->req, flags, conn);
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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 without new changes failed (%s)",
conn->output.name, modeset ? "modeset" : "pageflip");
}
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}
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);
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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);
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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);
}
}
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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 != NULL) {
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), &crtc->mode_id)) {
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wlr_log_errno(L_ERROR, "Unable to create property blob");
return false;
}
}
uint32_t flags = DRM_MODE_PAGE_FLIP_EVENT;
if (mode != NULL) {
flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
} else {
flags |= DRM_MODE_ATOMIC_NONBLOCK;
}
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struct atomic atom;
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atomic_begin(crtc, &atom);
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);
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, flags, mode);
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}
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static bool atomic_conn_enable(struct wlr_drm_backend *drm,
struct wlr_drm_connector *conn, bool enable) {
struct wlr_drm_crtc *crtc = conn->crtc;
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struct atomic atom;
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atomic_begin(crtc, &atom);
atomic_add(&atom, crtc->id, crtc->props.active, enable);
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if (enable) {
atomic_add(&atom, conn->id, conn->props.crtc_id, crtc->id);
atomic_add(&atom, crtc->id, crtc->props.mode_id, crtc->mode_id);
} else {
atomic_add(&atom, conn->id, conn->props.crtc_id, 0);
atomic_add(&atom, crtc->id, crtc->props.mode_id, 0);
}
return atomic_commit(drm->fd, &atom, conn, DRM_MODE_ATOMIC_ALLOW_MODESET,
true);
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}
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bool legacy_crtc_set_cursor(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, struct gbm_bo *bo);
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static bool atomic_crtc_set_cursor(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, struct gbm_bo *bo) {
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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) {
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return legacy_crtc_set_cursor(drm, crtc, bo);
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}
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);
}
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return atomic_end(drm->fd, &atom);
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}
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bool legacy_crtc_move_cursor(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, int x, int y);
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static bool atomic_crtc_move_cursor(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, int x, int y) {
Don't crash if crtc->cursor is NULL Same as what atomic_crtc_set_cursor does Core was generated by `_build/rootston/rootston'. Program terminated with signal SIGSEGV, Segmentation fault. 0 0xb6f28a1c in atomic_crtc_move_cursor (drm=0x1ebc8e8, crtc=0x1ead498, x=0, y=0) at ../backend/drm/atomic.c:170 170 if (!crtc || !crtc->cursor) { (gdb) bt 0 0xb6f28a1c in atomic_crtc_move_cursor (drm=0x1ebc8e8, crtc=0x1ead498, x=0, y=0) at ../backend/drm/atomic.c:170 1 0xb6f2a856 in wlr_drm_connector_move_cursor (output=0x2242b28, x=0, y=0) at ../backend/drm/drm.c:634 2 0xb6f3cea0 in wlr_output_cursor_set_image (cursor=0x21a0338, pixels=0x22e1290 "", stride=24, width=24, height=24, hotspot_x=4, hotspot_y=4) at ../types/wlr_output.c:516 3 0xb6f39da2 in wlr_cursor_set_image (cur=0x22cfc90, pixels=0x22e1290 "", stride=24, width=24, height=24, hotspot_x=4, hotspot_y=4, scale=1) at ../types/wlr_cursor.c:310 4 0xb6f44d2a in wlr_xcursor_manager_set_cursor_image (manager=0x22cfd10, name=0x434420 "left_ptr", cursor=0x22cfc90) at ../types/wlr_xcursor_manager.c:80 5 0x00431c0a in roots_seat_configure_xcursor (seat=0x22cef08) at ../rootston/seat.c:515 6 0x0043137c in roots_seat_init_cursor (seat=0x22cef08) at ../rootston/seat.c:210 7 0x004315ec in roots_seat_create (input=0x218d220, name=0x434594 "seat0") at ../rootston/seat.c:289 8 0x0042ecba in input_get_seat (input=0x218d220, name=0x434594 "seat0") at ../rootston/input.c:39 9 0x0042ed04 in input_add_notify (listener=0x218d228, data=0x218d3b0) at ../rootston/input.c:54 10 0xb6f2f2e6 in wl_signal_emit (signal=0x1ea548c, data=0x218d3b0) at /usr/include/wayland-server-core.h:387 11 0xb6f2f572 in input_add_reemit (listener=0x1ea9990, data=0x218d3b0) at ../backend/multi/backend.c:101 12 0xb6f2db7e in wl_signal_emit (signal=0x1ea992c, data=0x218d3b0) at /usr/include/wayland-server-core.h:387 13 0xb6f2ddaa in handle_device_added (backend=0x1ea9920, libinput_dev=0x2292598) at ../backend/libinput/events.c:87 14 0xb6f2e164 in wlr_libinput_event (backend=0x1ea9920, event=0x2292b78) at ../backend/libinput/events.c:198 15 0xb6f2d678 in wlr_libinput_readable (fd=23, mask=1, _backend=0x1ea9920) at ../backend/libinput/backend.c:28 16 0xb6f2d7c0 in wlr_libinput_backend_start (_backend=0x1ea9920) at ../backend/libinput/backend.c:74 17 0xb6f27170 in wlr_backend_start (backend=0x1ea9920) at ../backend/backend.c:30 18 0xb6f2f320 in multi_backend_start (wlr_backend=0x1ea5480) at ../backend/multi/backend.c:22 19 0xb6f27170 in wlr_backend_start (backend=0x1ea5480) at ../backend/backend.c:30 20 0x0042fbc6 in main (argc=1, argv=0xbe89dd04) at ../rootston/main.c:60
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if (!crtc || !crtc->cursor) {
return true;
}
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struct wlr_drm_plane *plane = crtc->cursor;
// We can't use atomic operations on fake planes
if (plane->id == 0) {
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return legacy_crtc_move_cursor(drm, crtc, x, y);
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}
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);
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return atomic_end(drm->fd, &atom);
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}
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static bool atomic_crtc_set_gamma(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, uint16_t *r, uint16_t *g, uint16_t *b,
uint32_t size) {
struct drm_color_lut *gamma = calloc(sizeof(struct drm_color_lut), size);
for (uint32_t i = 0; i < size; i++) {
gamma[i].red = r[i];
gamma[i].green = g[i];
gamma[i].blue = b[i];
}
if (crtc->gamma_lut != 0) {
drmModeDestroyPropertyBlob(drm->fd, crtc->gamma_lut);
}
if (drmModeCreatePropertyBlob(drm->fd, gamma,
sizeof(struct drm_color_lut) * size, &crtc->gamma_lut)) {
wlr_log_errno(L_ERROR, "Unable to create property blob");
return false;
}
free(gamma);
struct atomic atom;
atomic_begin(crtc, &atom);
atomic_add(&atom, crtc->id, crtc->props.gamma_lut, crtc->gamma_lut);
return atomic_end(drm->fd, &atom);
}
static uint32_t atomic_crtc_get_gamma_size(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc) {
uint64_t gamma_lut_size;
if (!wlr_drm_get_prop(drm->fd, crtc->id, crtc->props.gamma_lut_size,
&gamma_lut_size)) {
wlr_log(L_ERROR, "Unable to get gamma lut size");
return 0;
}
return (uint32_t) gamma_lut_size;
}
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const struct wlr_drm_interface atomic_iface = {
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.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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.crtc_set_gamma = atomic_crtc_set_gamma,
.crtc_get_gamma_size = atomic_crtc_get_gamma_size,
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};