wlroots/backend/drm/drm.c

1634 lines
45 KiB
C

#define _XOPEN_SOURCE 700
#include <assert.h>
#include <drm_fourcc.h>
#include <drm_mode.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <wayland-server-core.h>
#include <wayland-util.h>
#include <wlr/backend/interface.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/box.h>
#include <wlr/util/log.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "backend/drm/cvt.h"
#include "backend/drm/drm.h"
#include "backend/drm/iface.h"
#include "backend/drm/util.h"
#include "render/pixel_format.h"
#include "render/drm_format_set.h"
#include "render/swapchain.h"
#include "render/wlr_renderer.h"
#include "util/signal.h"
static const uint32_t SUPPORTED_OUTPUT_STATE =
WLR_OUTPUT_STATE_BACKEND_OPTIONAL |
WLR_OUTPUT_STATE_BUFFER |
WLR_OUTPUT_STATE_MODE |
WLR_OUTPUT_STATE_ENABLED |
WLR_OUTPUT_STATE_GAMMA_LUT;
bool check_drm_features(struct wlr_drm_backend *drm) {
if (drmGetCap(drm->fd, DRM_CAP_CURSOR_WIDTH, &drm->cursor_width)) {
drm->cursor_width = 64;
}
if (drmGetCap(drm->fd, DRM_CAP_CURSOR_HEIGHT, &drm->cursor_height)) {
drm->cursor_height = 64;
}
uint64_t cap;
if (drmGetCap(drm->fd, DRM_CAP_PRIME, &cap) ||
!(cap & DRM_PRIME_CAP_IMPORT)) {
wlr_log(WLR_ERROR, "PRIME import not supported");
return false;
}
if (drm->parent) {
if (drmGetCap(drm->parent->fd, DRM_CAP_PRIME, &cap) ||
!(cap & DRM_PRIME_CAP_EXPORT)) {
wlr_log(WLR_ERROR,
"PRIME export not supported on primary GPU");
return false;
}
}
if (drmSetClientCap(drm->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1)) {
wlr_log(WLR_ERROR, "DRM universal planes unsupported");
return false;
}
if (drmGetCap(drm->fd, DRM_CAP_CRTC_IN_VBLANK_EVENT, &cap) || !cap) {
wlr_log(WLR_ERROR, "DRM_CRTC_IN_VBLANK_EVENT unsupported");
return false;
}
const char *no_atomic = getenv("WLR_DRM_NO_ATOMIC");
if (no_atomic && strcmp(no_atomic, "1") == 0) {
wlr_log(WLR_DEBUG,
"WLR_DRM_NO_ATOMIC set, forcing legacy DRM interface");
drm->iface = &legacy_iface;
} else if (drmSetClientCap(drm->fd, DRM_CLIENT_CAP_ATOMIC, 1)) {
wlr_log(WLR_DEBUG,
"Atomic modesetting unsupported, using legacy DRM interface");
drm->iface = &legacy_iface;
} else {
wlr_log(WLR_DEBUG, "Using atomic DRM interface");
drm->iface = &atomic_iface;
}
int ret = drmGetCap(drm->fd, DRM_CAP_TIMESTAMP_MONOTONIC, &cap);
drm->clock = (ret == 0 && cap == 1) ? CLOCK_MONOTONIC : CLOCK_REALTIME;
const char *no_modifiers = getenv("WLR_DRM_NO_MODIFIERS");
if (no_modifiers != NULL && strcmp(no_modifiers, "1") == 0) {
wlr_log(WLR_DEBUG, "WLR_DRM_NO_MODIFIERS set, disabling modifiers");
} else {
ret = drmGetCap(drm->fd, DRM_CAP_ADDFB2_MODIFIERS, &cap);
drm->addfb2_modifiers = ret == 0 && cap == 1;
wlr_log(WLR_DEBUG, "ADDFB2 modifiers %s",
drm->addfb2_modifiers ? "supported" : "unsupported");
}
return true;
}
static bool add_plane(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc, const drmModePlane *drm_plane,
uint32_t type, union wlr_drm_plane_props *props) {
assert(!(type == DRM_PLANE_TYPE_PRIMARY && crtc->primary));
assert(!(type == DRM_PLANE_TYPE_CURSOR && crtc->cursor));
struct wlr_drm_plane *p = calloc(1, sizeof(*p));
if (!p) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return false;
}
p->type = type;
p->id = drm_plane->plane_id;
p->props = *props;
for (size_t i = 0; i < drm_plane->count_formats; ++i) {
// Force a LINEAR layout for the cursor if the driver doesn't support
// modifiers
uint64_t mod = DRM_FORMAT_MOD_INVALID;
if (type == DRM_PLANE_TYPE_CURSOR) {
mod = DRM_FORMAT_MOD_LINEAR;
}
wlr_drm_format_set_add(&p->formats, drm_plane->formats[i], mod);
}
if (p->props.in_formats && drm->addfb2_modifiers) {
uint64_t blob_id;
if (!get_drm_prop(drm->fd, p->id, p->props.in_formats, &blob_id)) {
wlr_log(WLR_ERROR, "Failed to read IN_FORMATS property");
goto error;
}
drmModePropertyBlobRes *blob = drmModeGetPropertyBlob(drm->fd, blob_id);
if (!blob) {
wlr_log(WLR_ERROR, "Failed to read IN_FORMATS blob");
goto error;
}
struct drm_format_modifier_blob *data = blob->data;
uint32_t *fmts = (uint32_t *)((char *)data + data->formats_offset);
struct drm_format_modifier *mods = (struct drm_format_modifier *)
((char *)data + data->modifiers_offset);
for (uint32_t i = 0; i < data->count_modifiers; ++i) {
for (int j = 0; j < 64; ++j) {
if (mods[i].formats & ((uint64_t)1 << j)) {
wlr_drm_format_set_add(&p->formats,
fmts[j + mods[i].offset], mods[i].modifier);
}
}
}
drmModeFreePropertyBlob(blob);
}
switch (type) {
case DRM_PLANE_TYPE_PRIMARY:
crtc->primary = p;
break;
case DRM_PLANE_TYPE_CURSOR:
crtc->cursor = p;
break;
default:
abort();
}
return true;
error:
free(p);
return false;
}
static bool init_planes(struct wlr_drm_backend *drm) {
drmModePlaneRes *plane_res = drmModeGetPlaneResources(drm->fd);
if (!plane_res) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM plane resources");
return false;
}
wlr_log(WLR_INFO, "Found %"PRIu32" DRM planes", plane_res->count_planes);
for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
uint32_t id = plane_res->planes[i];
drmModePlane *plane = drmModeGetPlane(drm->fd, id);
if (!plane) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM plane");
goto error;
}
union wlr_drm_plane_props props = {0};
if (!get_drm_plane_props(drm->fd, id, &props)) {
drmModeFreePlane(plane);
goto error;
}
uint64_t type;
if (!get_drm_prop(drm->fd, id, props.type, &type)) {
drmModeFreePlane(plane);
goto error;
}
// We don't really care about overlay planes, as we don't support them
// yet.
if (type == DRM_PLANE_TYPE_OVERLAY) {
drmModeFreePlane(plane);
continue;
}
assert(drm->num_crtcs <= 32);
struct wlr_drm_crtc *crtc = NULL;
for (size_t j = 0; j < drm->num_crtcs ; j++) {
uint32_t crtc_bit = 1 << j;
if ((plane->possible_crtcs & crtc_bit) == 0) {
continue;
}
struct wlr_drm_crtc *candidate = &drm->crtcs[j];
if ((type == DRM_PLANE_TYPE_PRIMARY && !candidate->primary) ||
(type == DRM_PLANE_TYPE_CURSOR && !candidate->cursor)) {
crtc = candidate;
break;
}
}
if (!crtc) {
drmModeFreePlane(plane);
continue;
}
if (!add_plane(drm, crtc, plane, type, &props)) {
drmModeFreePlane(plane);
goto error;
}
drmModeFreePlane(plane);
}
drmModeFreePlaneResources(plane_res);
return true;
error:
drmModeFreePlaneResources(plane_res);
return false;
}
bool init_drm_resources(struct wlr_drm_backend *drm) {
drmModeRes *res = drmModeGetResources(drm->fd);
if (!res) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM resources");
return false;
}
wlr_log(WLR_INFO, "Found %d DRM CRTCs", res->count_crtcs);
drm->num_crtcs = res->count_crtcs;
if (drm->num_crtcs == 0) {
drmModeFreeResources(res);
return true;
}
drm->crtcs = calloc(drm->num_crtcs, sizeof(drm->crtcs[0]));
if (!drm->crtcs) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
goto error_res;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
struct wlr_drm_crtc *crtc = &drm->crtcs[i];
crtc->id = res->crtcs[i];
crtc->legacy_crtc = drmModeGetCrtc(drm->fd, crtc->id);
get_drm_crtc_props(drm->fd, crtc->id, &crtc->props);
}
if (!init_planes(drm)) {
goto error_crtcs;
}
drmModeFreeResources(res);
return true;
error_crtcs:
free(drm->crtcs);
error_res:
drmModeFreeResources(res);
return false;
}
void finish_drm_resources(struct wlr_drm_backend *drm) {
if (!drm) {
return;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
struct wlr_drm_crtc *crtc = &drm->crtcs[i];
drmModeFreeCrtc(crtc->legacy_crtc);
if (crtc->mode_id) {
drmModeDestroyPropertyBlob(drm->fd, crtc->mode_id);
}
if (crtc->gamma_lut) {
drmModeDestroyPropertyBlob(drm->fd, crtc->gamma_lut);
}
if (crtc->primary) {
wlr_drm_format_set_finish(&crtc->primary->formats);
free(crtc->primary);
}
if (crtc->cursor) {
wlr_drm_format_set_finish(&crtc->cursor->formats);
free(crtc->cursor);
}
}
free(drm->crtcs);
}
static struct wlr_drm_connector *get_drm_connector_from_output(
struct wlr_output *wlr_output) {
assert(wlr_output_is_drm(wlr_output));
return (struct wlr_drm_connector *)wlr_output;
}
static bool drm_crtc_commit(struct wlr_drm_connector *conn,
const struct wlr_drm_connector_state *state,
uint32_t flags, bool test_only) {
// Disallow atomic-only flags
assert((flags & ~DRM_MODE_PAGE_FLIP_FLAGS) == 0);
struct wlr_drm_backend *drm = conn->backend;
struct wlr_drm_crtc *crtc = conn->crtc;
bool ok = drm->iface->crtc_commit(conn, state, flags, test_only);
if (ok && !test_only) {
drm_fb_move(&crtc->primary->queued_fb, &crtc->primary->pending_fb);
if (crtc->cursor != NULL) {
drm_fb_move(&crtc->cursor->queued_fb, &crtc->cursor->pending_fb);
}
} else {
drm_fb_clear(&crtc->primary->pending_fb);
// The set_cursor() hook is a bit special: it's not really synchronized
// to commit() or test(). Once set_cursor() returns true, the new
// cursor is effectively committed. So don't roll it back here, or we
// risk ending up in a state where we don't have a cursor FB but
// wlr_drm_connector.cursor_enabled is true.
// TODO: fix our output interface to avoid this issue.
}
return ok;
}
static bool drm_crtc_page_flip(struct wlr_drm_connector *conn,
const struct wlr_drm_connector_state *state) {
struct wlr_drm_crtc *crtc = conn->crtc;
assert(crtc != NULL);
// wlr_drm_interface.crtc_commit will perform either a non-blocking
// page-flip, either a blocking modeset. When performing a blocking modeset
// we'll wait for all queued page-flips to complete, so we don't need this
// safeguard.
if (conn->pending_page_flip_crtc && !state->modeset) {
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to page-flip output: "
"a page-flip is already pending");
return false;
}
assert(state->active);
assert(plane_get_next_fb(crtc->primary));
if (!drm_crtc_commit(conn, state, DRM_MODE_PAGE_FLIP_EVENT, false)) {
return false;
}
conn->pending_page_flip_crtc = crtc->id;
// wlr_output's API guarantees that submitting a buffer will schedule a
// frame event. However the DRM backend will also schedule a frame event
// when performing a modeset. Set frame_pending to true so that
// wlr_output_schedule_frame doesn't trigger a synthetic frame event.
conn->output.frame_pending = true;
return true;
}
static void drm_connector_state_init(struct wlr_drm_connector_state *state,
struct wlr_drm_connector *conn,
const struct wlr_output_state *base) {
state->base = base;
state->modeset = base->committed &
(WLR_OUTPUT_STATE_ENABLED | WLR_OUTPUT_STATE_MODE);
state->active = (base->committed & WLR_OUTPUT_STATE_ENABLED) ?
base->enabled : conn->output.enabled;
if (base->committed & WLR_OUTPUT_STATE_MODE) {
switch (base->mode_type) {
case WLR_OUTPUT_STATE_MODE_FIXED:;
struct wlr_drm_mode *mode = (struct wlr_drm_mode *)base->mode;
state->mode = mode->drm_mode;
break;
case WLR_OUTPUT_STATE_MODE_CUSTOM:
generate_cvt_mode(&state->mode, base->custom_mode.width,
base->custom_mode.height,
(float)base->custom_mode.refresh / 1000, false, false);
state->mode.type = DRM_MODE_TYPE_USERDEF;
break;
}
} else if (state->active) {
struct wlr_drm_mode *mode =
(struct wlr_drm_mode *)conn->output.current_mode;
assert(mode != NULL);
state->mode = mode->drm_mode;
}
}
static bool drm_connector_set_pending_fb(struct wlr_drm_connector *conn,
const struct wlr_output_state *state) {
struct wlr_drm_backend *drm = conn->backend;
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
struct wlr_drm_plane *plane = crtc->primary;
assert(state->committed & WLR_OUTPUT_STATE_BUFFER);
struct wlr_buffer *local_buf;
if (drm->parent) {
struct wlr_drm_format *format =
drm_plane_pick_render_format(plane, &drm->mgpu_renderer);
if (format == NULL) {
wlr_log(WLR_ERROR, "Failed to pick primary plane format");
return false;
}
// TODO: fallback to modifier-less buffer allocation
bool ok = init_drm_surface(&plane->mgpu_surf, &drm->mgpu_renderer,
state->buffer->width, state->buffer->height, format);
free(format);
if (!ok) {
return false;
}
local_buf = drm_surface_blit(&plane->mgpu_surf, state->buffer);
if (local_buf == NULL) {
return false;
}
} else {
local_buf = wlr_buffer_lock(state->buffer);
}
bool ok = drm_fb_import(&plane->pending_fb, drm, local_buf,
&crtc->primary->formats);
wlr_buffer_unlock(local_buf);
if (!ok) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"Failed to import buffer for scan-out");
return false;
}
return true;
}
static bool drm_connector_alloc_crtc(struct wlr_drm_connector *conn);
static bool drm_connector_test(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (!conn->backend->session->active) {
return false;
}
uint32_t unsupported = output->pending.committed & ~SUPPORTED_OUTPUT_STATE;
if (unsupported != 0) {
wlr_log(WLR_DEBUG, "Unsupported output state fields: 0x%"PRIx32,
unsupported);
return false;
}
if ((output->pending.committed & WLR_OUTPUT_STATE_ENABLED) &&
output->pending.enabled) {
if (output->current_mode == NULL &&
!(output->pending.committed & WLR_OUTPUT_STATE_MODE)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"Can't enable an output without a mode");
return false;
}
}
struct wlr_drm_connector_state pending = {0};
drm_connector_state_init(&pending, conn, &output->pending);
if (pending.active) {
if ((output->pending.committed &
(WLR_OUTPUT_STATE_ENABLED | WLR_OUTPUT_STATE_MODE)) &&
!(output->pending.committed & WLR_OUTPUT_STATE_BUFFER)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"Can't enable an output without a buffer");
return false;
}
if (!drm_connector_alloc_crtc(conn)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"No CRTC available for this connector");
return false;
}
}
if (conn->backend->parent) {
// If we're running as a secondary GPU, we can't perform an atomic
// commit without blitting a buffer.
return true;
}
if (!conn->crtc) {
// If the output is disabled, we don't have a crtc even after
// reallocation
return true;
}
if (output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
if (!drm_connector_set_pending_fb(conn, pending.base)) {
return false;
}
}
return drm_crtc_commit(conn, &pending, 0, true);
}
bool drm_connector_supports_vrr(struct wlr_drm_connector *conn) {
struct wlr_drm_backend *drm = conn->backend;
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
uint64_t vrr_capable;
if (conn->props.vrr_capable == 0 ||
!get_drm_prop(drm->fd, conn->id, conn->props.vrr_capable,
&vrr_capable) || !vrr_capable) {
wlr_drm_conn_log(conn, WLR_DEBUG, "Failed to enable adaptive sync: "
"connector doesn't support VRR");
return false;
}
if (crtc->props.vrr_enabled == 0) {
wlr_drm_conn_log(conn, WLR_DEBUG, "Failed to enable adaptive sync: "
"CRTC %"PRIu32" doesn't support VRR", crtc->id);
return false;
}
return true;
}
static bool drm_connector_set_mode(struct wlr_drm_connector *conn,
const struct wlr_drm_connector_state *state);
bool drm_connector_commit_state(struct wlr_drm_connector *conn,
const struct wlr_output_state *base) {
struct wlr_drm_backend *drm = conn->backend;
if (!drm->session->active) {
return false;
}
struct wlr_drm_connector_state pending = {0};
drm_connector_state_init(&pending, conn, base);
if (pending.active) {
if (!drm_connector_alloc_crtc(conn)) {
wlr_drm_conn_log(conn, WLR_ERROR,
"No CRTC available for this connector");
return false;
}
}
if (pending.base->committed & WLR_OUTPUT_STATE_BUFFER) {
if (!drm_connector_set_pending_fb(conn, pending.base)) {
return false;
}
}
if (pending.modeset) {
if (!drm_connector_set_mode(conn, &pending)) {
return false;
}
} else if (pending.base->committed & WLR_OUTPUT_STATE_BUFFER) {
if (!drm_crtc_page_flip(conn, &pending)) {
return false;
}
} else if (pending.base->committed & (WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED |
WLR_OUTPUT_STATE_GAMMA_LUT)) {
assert(conn->crtc != NULL);
// TODO: maybe request a page-flip event here?
if (!drm_crtc_commit(conn, &pending, 0, false)) {
return false;
}
}
return true;
}
static bool drm_connector_commit(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (!drm_connector_test(output)) {
return false;
}
return drm_connector_commit_state(conn, &output->pending);
}
size_t drm_crtc_get_gamma_lut_size(struct wlr_drm_backend *drm,
struct wlr_drm_crtc *crtc) {
if (crtc->props.gamma_lut_size == 0 || drm->iface == &legacy_iface) {
return (size_t)crtc->legacy_crtc->gamma_size;
}
uint64_t gamma_lut_size;
if (!get_drm_prop(drm->fd, crtc->id, crtc->props.gamma_lut_size,
&gamma_lut_size)) {
wlr_log(WLR_ERROR, "Unable to get gamma lut size");
return 0;
}
return gamma_lut_size;
}
static size_t drm_connector_get_gamma_size(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = conn->backend;
struct wlr_drm_crtc *crtc = conn->crtc;
if (crtc == NULL) {
return 0;
}
return drm_crtc_get_gamma_lut_size(drm, crtc);
}
struct wlr_drm_fb *plane_get_next_fb(struct wlr_drm_plane *plane) {
if (plane->pending_fb) {
return plane->pending_fb;
}
if (plane->queued_fb) {
return plane->queued_fb;
}
return plane->current_fb;
}
static void realloc_crtcs(struct wlr_drm_backend *drm);
static bool drm_connector_alloc_crtc(struct wlr_drm_connector *conn) {
if (conn->crtc != NULL) {
return true;
}
bool prev_desired_enabled = conn->desired_enabled;
conn->desired_enabled = true;
realloc_crtcs(conn->backend);
conn->desired_enabled = prev_desired_enabled;
return conn->crtc != NULL;
}
static bool drm_connector_set_mode(struct wlr_drm_connector *conn,
const struct wlr_drm_connector_state *state) {
struct wlr_output_mode *wlr_mode = NULL;
if (state->active) {
if (state->base->committed & WLR_OUTPUT_STATE_MODE) {
switch (state->base->mode_type) {
case WLR_OUTPUT_STATE_MODE_FIXED:
wlr_mode = state->base->mode;
break;
case WLR_OUTPUT_STATE_MODE_CUSTOM:
wlr_mode = wlr_drm_connector_add_mode(&conn->output, &state->mode);
if (wlr_mode == NULL) {
return false;
}
break;
}
} else {
wlr_mode = conn->output.current_mode;
}
}
conn->desired_enabled = wlr_mode != NULL;
if (wlr_mode == NULL) {
if (conn->crtc != NULL) {
if (!drm_crtc_commit(conn, state, 0, false)) {
return false;
}
}
wlr_output_update_enabled(&conn->output, false);
return true;
}
if (conn->status != WLR_DRM_CONN_CONNECTED
&& conn->status != WLR_DRM_CONN_NEEDS_MODESET) {
wlr_drm_conn_log(conn, WLR_ERROR,
"Cannot modeset a disconnected output");
return false;
}
if (!drm_connector_alloc_crtc(conn)) {
wlr_drm_conn_log(conn, WLR_ERROR,
"Cannot perform modeset: no CRTC for this connector");
return false;
}
wlr_drm_conn_log(conn, WLR_INFO,
"Modesetting with '%" PRId32 "x%" PRId32 "@%" PRId32 "mHz'",
wlr_mode->width, wlr_mode->height, wlr_mode->refresh);
// drm_crtc_page_flip expects a FB to be available
struct wlr_drm_plane *plane = conn->crtc->primary;
if (!plane_get_next_fb(plane)) {
wlr_drm_conn_log(conn, WLR_ERROR, "Missing FB in modeset");
return false;
}
if (!drm_crtc_page_flip(conn, state)) {
return false;
}
conn->status = WLR_DRM_CONN_CONNECTED;
wlr_output_update_mode(&conn->output, wlr_mode);
wlr_output_update_enabled(&conn->output, true);
conn->desired_enabled = true;
// When switching VTs, the mode is not updated but the buffers become
// invalid, so we need to manually damage the output here
wlr_output_damage_whole(&conn->output);
return true;
}
struct wlr_output_mode *wlr_drm_connector_add_mode(struct wlr_output *output,
const drmModeModeInfo *modeinfo) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (modeinfo->type != DRM_MODE_TYPE_USERDEF) {
return NULL;
}
struct wlr_output_mode *wlr_mode;
wl_list_for_each(wlr_mode, &conn->output.modes, link) {
struct wlr_drm_mode *mode = (struct wlr_drm_mode *)wlr_mode;
if (memcmp(&mode->drm_mode, modeinfo, sizeof(*modeinfo)) == 0) {
return wlr_mode;
}
}
struct wlr_drm_mode *mode = calloc(1, sizeof(*mode));
if (!mode) {
return NULL;
}
memcpy(&mode->drm_mode, modeinfo, sizeof(*modeinfo));
mode->wlr_mode.width = mode->drm_mode.hdisplay;
mode->wlr_mode.height = mode->drm_mode.vdisplay;
mode->wlr_mode.refresh = calculate_refresh_rate(modeinfo);
wlr_drm_conn_log(conn, WLR_INFO, "Registered custom mode "
"%"PRId32"x%"PRId32"@%"PRId32,
mode->wlr_mode.width, mode->wlr_mode.height,
mode->wlr_mode.refresh);
wl_list_insert(&conn->output.modes, &mode->wlr_mode.link);
return &mode->wlr_mode;
}
static bool drm_connector_set_cursor(struct wlr_output *output,
struct wlr_buffer *buffer, int hotspot_x, int hotspot_y) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = conn->backend;
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
return false;
}
struct wlr_drm_plane *plane = crtc->cursor;
if (plane == NULL) {
return false;
}
if (conn->cursor_hotspot_x != hotspot_x ||
conn->cursor_hotspot_y != hotspot_y) {
// Update cursor hotspot
conn->cursor_x -= hotspot_x - conn->cursor_hotspot_x;
conn->cursor_y -= hotspot_y - conn->cursor_hotspot_y;
conn->cursor_hotspot_x = hotspot_x;
conn->cursor_hotspot_y = hotspot_y;
wlr_output_update_needs_frame(output);
}
conn->cursor_enabled = false;
if (buffer != NULL) {
if ((uint64_t)buffer->width != drm->cursor_width ||
(uint64_t)buffer->height != drm->cursor_height) {
wlr_drm_conn_log(conn, WLR_DEBUG, "Cursor buffer size mismatch");
return false;
}
struct wlr_buffer *local_buf;
if (drm->parent) {
struct wlr_drm_format *format =
drm_plane_pick_render_format(plane, &drm->mgpu_renderer);
if (format == NULL) {
wlr_log(WLR_ERROR, "Failed to pick cursor plane format");
return false;
}
bool ok = init_drm_surface(&plane->mgpu_surf, &drm->mgpu_renderer,
buffer->width, buffer->height, format);
free(format);
if (!ok) {
return false;
}
local_buf = drm_surface_blit(&plane->mgpu_surf, buffer);
if (local_buf == NULL) {
return false;
}
} else {
local_buf = wlr_buffer_lock(buffer);
}
bool ok = drm_fb_import(&plane->pending_fb, drm, local_buf,
&plane->formats);
wlr_buffer_unlock(local_buf);
if (!ok) {
return false;
}
conn->cursor_enabled = true;
conn->cursor_width = buffer->width;
conn->cursor_height = buffer->height;
}
wlr_output_update_needs_frame(output);
return true;
}
static bool drm_connector_move_cursor(struct wlr_output *output,
int x, int y) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (!conn->crtc) {
return false;
}
struct wlr_drm_plane *plane = conn->crtc->cursor;
if (!plane) {
return false;
}
struct wlr_box box = { .x = x, .y = y };
int width, height;
wlr_output_transformed_resolution(output, &width, &height);
enum wl_output_transform transform =
wlr_output_transform_invert(output->transform);
wlr_box_transform(&box, &box, transform, width, height);
box.x -= conn->cursor_hotspot_x;
box.y -= conn->cursor_hotspot_y;
conn->cursor_x = box.x;
conn->cursor_y = box.y;
wlr_output_update_needs_frame(output);
return true;
}
bool drm_connector_is_cursor_visible(struct wlr_drm_connector *conn) {
return conn->cursor_enabled &&
conn->cursor_x < conn->output.width &&
conn->cursor_y < conn->output.height &&
conn->cursor_x + conn->cursor_width >= 0 &&
conn->cursor_y + conn->cursor_height >= 0;
}
static void dealloc_crtc(struct wlr_drm_connector *conn);
/**
* Destroy the compositor-facing part of a connector.
*
* The connector isn't destroyed when disconnected. Only the compositor-facing
* wlr_output interface is cleaned up.
*/
static void drm_connector_destroy_output(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
dealloc_crtc(conn);
conn->status = WLR_DRM_CONN_DISCONNECTED;
conn->desired_enabled = false;
conn->possible_crtcs = 0;
conn->pending_page_flip_crtc = 0;
struct wlr_drm_mode *mode, *mode_tmp;
wl_list_for_each_safe(mode, mode_tmp, &conn->output.modes, wlr_mode.link) {
wl_list_remove(&mode->wlr_mode.link);
free(mode);
}
memset(&conn->output, 0, sizeof(struct wlr_output));
}
static const struct wlr_drm_format_set *drm_connector_get_cursor_formats(
struct wlr_output *output, uint32_t buffer_caps) {
if (!(buffer_caps & WLR_BUFFER_CAP_DMABUF)) {
return NULL;
}
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (!conn->crtc && !drm_connector_alloc_crtc(conn)) {
return NULL;
}
struct wlr_drm_plane *plane = conn->crtc->cursor;
if (!plane) {
return NULL;
}
if (conn->backend->parent) {
return &conn->backend->mgpu_formats;
}
return &plane->formats;
}
static void drm_connector_get_cursor_size(struct wlr_output *output,
int *width, int *height) {
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
*width = (int)drm->cursor_width;
*height = (int)drm->cursor_height;
}
static const struct wlr_drm_format_set *drm_connector_get_primary_formats(
struct wlr_output *output, uint32_t buffer_caps) {
if (!(buffer_caps & WLR_BUFFER_CAP_DMABUF)) {
return NULL;
}
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (!conn->crtc && !drm_connector_alloc_crtc(conn)) {
return NULL;
}
if (conn->backend->parent) {
return &conn->backend->mgpu_formats;
}
return &conn->crtc->primary->formats;
}
static const struct wlr_output_impl output_impl = {
.set_cursor = drm_connector_set_cursor,
.move_cursor = drm_connector_move_cursor,
.destroy = drm_connector_destroy_output,
.test = drm_connector_test,
.commit = drm_connector_commit,
.get_gamma_size = drm_connector_get_gamma_size,
.get_cursor_formats = drm_connector_get_cursor_formats,
.get_cursor_size = drm_connector_get_cursor_size,
.get_primary_formats = drm_connector_get_primary_formats,
};
bool wlr_output_is_drm(struct wlr_output *output) {
return output->impl == &output_impl;
}
uint32_t wlr_drm_connector_get_id(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
return conn->id;
}
enum wl_output_transform wlr_drm_connector_get_panel_orientation(
struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (conn->props.panel_orientation) {
return WL_OUTPUT_TRANSFORM_NORMAL;
}
char *orientation = get_drm_prop_enum(conn->backend->fd, conn->id,
conn->props.panel_orientation);
if (orientation == NULL) {
return WL_OUTPUT_TRANSFORM_NORMAL;
}
enum wl_output_transform tr;
if (strcmp(orientation, "Normal") == 0) {
tr = WL_OUTPUT_TRANSFORM_NORMAL;
} else if (strcmp(orientation, "Left Side Up") == 0) {
tr = WL_OUTPUT_TRANSFORM_90;
} else if (strcmp(orientation, "Upside Down") == 0) {
tr = WL_OUTPUT_TRANSFORM_180;
} else if (strcmp(orientation, "Right Side Up") == 0) {
tr = WL_OUTPUT_TRANSFORM_270;
} else {
wlr_drm_conn_log(conn, WLR_ERROR, "Unknown panel orientation: %s", orientation);
tr = WL_OUTPUT_TRANSFORM_NORMAL;
}
free(orientation);
return tr;
}
static const int32_t subpixel_map[] = {
[DRM_MODE_SUBPIXEL_UNKNOWN] = WL_OUTPUT_SUBPIXEL_UNKNOWN,
[DRM_MODE_SUBPIXEL_HORIZONTAL_RGB] = WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB,
[DRM_MODE_SUBPIXEL_HORIZONTAL_BGR] = WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR,
[DRM_MODE_SUBPIXEL_VERTICAL_RGB] = WL_OUTPUT_SUBPIXEL_VERTICAL_RGB,
[DRM_MODE_SUBPIXEL_VERTICAL_BGR] = WL_OUTPUT_SUBPIXEL_VERTICAL_BGR,
[DRM_MODE_SUBPIXEL_NONE] = WL_OUTPUT_SUBPIXEL_NONE,
};
static void dealloc_crtc(struct wlr_drm_connector *conn) {
struct wlr_drm_backend *drm = conn->backend;
if (conn->crtc == NULL) {
return;
}
wlr_drm_conn_log(conn, WLR_DEBUG, "De-allocating CRTC %zu",
conn->crtc - drm->crtcs);
struct wlr_output_state output_state = {
.committed = WLR_OUTPUT_STATE_ENABLED,
.enabled = false,
};
struct wlr_drm_connector_state conn_state = {0};
drm_connector_state_init(&conn_state, conn, &output_state);
if (!drm_crtc_commit(conn, &conn_state, 0, false)) {
// On GPU unplug, disabling the CRTC can fail with EPERM
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to disable CRTC %"PRIu32,
conn->crtc->id);
}
drm_plane_finish_surface(conn->crtc->primary);
drm_plane_finish_surface(conn->crtc->cursor);
conn->cursor_enabled = false;
conn->crtc = NULL;
}
static void realloc_crtcs(struct wlr_drm_backend *drm) {
assert(drm->num_crtcs > 0);
size_t num_outputs = wl_list_length(&drm->outputs);
if (num_outputs == 0) {
return;
}
wlr_log(WLR_DEBUG, "Reallocating CRTCs");
struct wlr_drm_connector *connectors[num_outputs];
uint32_t connector_constraints[num_outputs];
uint32_t previous_match[drm->num_crtcs];
uint32_t new_match[drm->num_crtcs];
for (size_t i = 0; i < drm->num_crtcs; ++i) {
previous_match[i] = UNMATCHED;
}
wlr_log(WLR_DEBUG, "State before reallocation:");
size_t i = 0;
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
connectors[i] = conn;
wlr_log(WLR_DEBUG, " '%s' crtc=%d status=%d desired_enabled=%d",
conn->name, conn->crtc ? (int)(conn->crtc - drm->crtcs) : -1,
conn->status, conn->desired_enabled);
if (conn->crtc) {
previous_match[conn->crtc - drm->crtcs] = i;
}
// Only search CRTCs for user-enabled outputs (that are already
// connected or in need of a modeset)
if ((conn->status == WLR_DRM_CONN_CONNECTED ||
conn->status == WLR_DRM_CONN_NEEDS_MODESET) &&
conn->desired_enabled) {
connector_constraints[i] = conn->possible_crtcs;
} else {
// Will always fail to match anything
connector_constraints[i] = 0;
}
++i;
}
match_obj(num_outputs, connector_constraints,
drm->num_crtcs, previous_match, new_match);
// Converts our crtc=>connector result into a connector=>crtc one.
ssize_t connector_match[num_outputs];
for (size_t i = 0 ; i < num_outputs; ++i) {
connector_match[i] = -1;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (new_match[i] != UNMATCHED) {
connector_match[new_match[i]] = i;
}
}
/*
* In the case that we add a new connector (hotplug) and we fail to
* match everything, we prefer to fail the new connector and keep all
* of the old mappings instead.
*/
for (size_t i = 0; i < num_outputs; ++i) {
struct wlr_drm_connector *conn = connectors[i];
if (conn->status == WLR_DRM_CONN_CONNECTED &&
conn->desired_enabled &&
connector_match[i] == -1) {
wlr_log(WLR_DEBUG, "Could not match a CRTC for previously connected output; "
"keeping old configuration");
return;
}
}
wlr_log(WLR_DEBUG, "State after reallocation:");
// Apply new configuration
for (size_t i = 0; i < num_outputs; ++i) {
struct wlr_drm_connector *conn = connectors[i];
bool prev_enabled = conn->crtc;
wlr_log(WLR_DEBUG, " '%s' crtc=%zd status=%d desired_enabled=%d",
conn->name, connector_match[i], conn->status, conn->desired_enabled);
// We don't need to change anything.
if (prev_enabled && connector_match[i] == conn->crtc - drm->crtcs) {
continue;
}
dealloc_crtc(conn);
if (connector_match[i] == -1) {
if (prev_enabled) {
wlr_drm_conn_log(conn, WLR_DEBUG, "Output has lost its CRTC");
conn->status = WLR_DRM_CONN_NEEDS_MODESET;
wlr_output_update_enabled(&conn->output, false);
wlr_output_update_mode(&conn->output, NULL);
}
continue;
}
conn->crtc = &drm->crtcs[connector_match[i]];
// Only realloc buffers if we have actually been modeset
if (conn->status != WLR_DRM_CONN_CONNECTED) {
continue;
}
wlr_output_damage_whole(&conn->output);
}
}
static uint32_t get_possible_crtcs(int fd, const drmModeConnector *conn) {
uint32_t possible_crtcs = 0;
for (int i = 0; i < conn->count_encoders; ++i) {
drmModeEncoder *enc = drmModeGetEncoder(fd, conn->encoders[i]);
if (!enc) {
continue;
}
possible_crtcs |= enc->possible_crtcs;
drmModeFreeEncoder(enc);
}
return possible_crtcs;
}
static void disconnect_drm_connector(struct wlr_drm_connector *conn);
void scan_drm_connectors(struct wlr_drm_backend *drm) {
/*
* This GPU is not really a modesetting device.
* It's just being used as a renderer.
*/
if (drm->num_crtcs == 0) {
return;
}
wlr_log(WLR_INFO, "Scanning DRM connectors on %s", drm->name);
drmModeRes *res = drmModeGetResources(drm->fd);
if (!res) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM resources");
return;
}
size_t seen_len = wl_list_length(&drm->outputs);
// +1 so length can never be 0, which is undefined behaviour.
// Last element isn't used.
bool seen[seen_len + 1];
memset(seen, false, sizeof(seen));
size_t new_outputs_len = 0;
struct wlr_drm_connector *new_outputs[res->count_connectors + 1];
for (int i = 0; i < res->count_connectors; ++i) {
drmModeConnector *drm_conn = drmModeGetConnector(drm->fd,
res->connectors[i]);
if (!drm_conn) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM connector");
continue;
}
drmModeEncoder *curr_enc = drmModeGetEncoder(drm->fd,
drm_conn->encoder_id);
ssize_t index = -1;
struct wlr_drm_connector *c, *wlr_conn = NULL;
wl_list_for_each(c, &drm->outputs, link) {
index++;
if (c->id == drm_conn->connector_id) {
wlr_conn = c;
break;
}
}
if (!wlr_conn) {
wlr_conn = calloc(1, sizeof(*wlr_conn));
if (!wlr_conn) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
drmModeFreeEncoder(curr_enc);
drmModeFreeConnector(drm_conn);
continue;
}
wlr_conn->backend = drm;
wlr_conn->status = WLR_DRM_CONN_DISCONNECTED;
wlr_conn->id = drm_conn->connector_id;
snprintf(wlr_conn->name, sizeof(wlr_conn->name),
"%s-%"PRIu32, conn_get_name(drm_conn->connector_type),
drm_conn->connector_type_id);
wl_list_insert(drm->outputs.prev, &wlr_conn->link);
wlr_log(WLR_INFO, "Found connector '%s'", wlr_conn->name);
} else {
seen[index] = true;
}
if (curr_enc) {
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (drm->crtcs[i].id == curr_enc->crtc_id) {
wlr_conn->crtc = &drm->crtcs[i];
break;
}
}
} else {
wlr_conn->crtc = NULL;
}
// This can only happen *after* hotplug, since we haven't read the
// connector properties yet
if (wlr_conn->props.link_status != 0) {
uint64_t link_status;
if (!get_drm_prop(drm->fd, wlr_conn->id,
wlr_conn->props.link_status, &link_status)) {
wlr_drm_conn_log(wlr_conn, WLR_ERROR,
"Failed to get link status prop");
continue;
}
if (link_status == DRM_MODE_LINK_STATUS_BAD) {
// We need to reload our list of modes and force a modeset
wlr_drm_conn_log(wlr_conn, WLR_INFO, "Bad link detected");
disconnect_drm_connector(wlr_conn);
}
}
if (wlr_conn->status == WLR_DRM_CONN_DISCONNECTED &&
drm_conn->connection == DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' connected", wlr_conn->name);
wlr_log(WLR_DEBUG, "Current CRTC: %d",
wlr_conn->crtc ? (int)wlr_conn->crtc->id : -1);
wlr_output_init(&wlr_conn->output, &drm->backend, &output_impl,
drm->display);
memcpy(wlr_conn->output.name, wlr_conn->name,
sizeof(wlr_conn->output.name));
wlr_conn->output.phys_width = drm_conn->mmWidth;
wlr_conn->output.phys_height = drm_conn->mmHeight;
wlr_log(WLR_INFO, "Physical size: %"PRId32"x%"PRId32,
wlr_conn->output.phys_width, wlr_conn->output.phys_height);
wlr_conn->output.subpixel = subpixel_map[drm_conn->subpixel];
get_drm_connector_props(drm->fd, wlr_conn->id, &wlr_conn->props);
uint64_t non_desktop;
if (get_drm_prop(drm->fd, wlr_conn->id,
wlr_conn->props.non_desktop, &non_desktop)) {
if (non_desktop == 1) {
wlr_log(WLR_INFO, "Non-desktop connector");
}
wlr_conn->output.non_desktop = non_desktop;
}
size_t edid_len = 0;
uint8_t *edid = get_drm_prop_blob(drm->fd,
wlr_conn->id, wlr_conn->props.edid, &edid_len);
parse_edid(&wlr_conn->output, edid_len, edid);
free(edid);
char *subconnector = NULL;
if (wlr_conn->props.subconnector) {
subconnector = get_drm_prop_enum(drm->fd,
wlr_conn->id, wlr_conn->props.subconnector);
}
if (subconnector && strcmp(subconnector, "Native") == 0) {
free(subconnector);
subconnector = NULL;
}
struct wlr_output *output = &wlr_conn->output;
char description[128];
snprintf(description, sizeof(description), "%s %s %s (%s%s%s)",
output->make, output->model, output->serial, output->name,
subconnector ? " via " : "", subconnector ? subconnector : "");
wlr_output_set_description(output, description);
free(subconnector);
wlr_log(WLR_INFO, "Detected modes:");
for (int i = 0; i < drm_conn->count_modes; ++i) {
struct wlr_drm_mode *mode = calloc(1, sizeof(*mode));
if (!mode) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
continue;
}
if (drm_conn->modes[i].flags & DRM_MODE_FLAG_INTERLACE) {
free(mode);
continue;
}
mode->drm_mode = drm_conn->modes[i];
mode->wlr_mode.width = mode->drm_mode.hdisplay;
mode->wlr_mode.height = mode->drm_mode.vdisplay;
mode->wlr_mode.refresh = calculate_refresh_rate(&mode->drm_mode);
if (mode->drm_mode.type & DRM_MODE_TYPE_PREFERRED) {
mode->wlr_mode.preferred = true;
}
wlr_log(WLR_INFO, " %"PRId32"x%"PRId32"@%"PRId32" %s",
mode->wlr_mode.width, mode->wlr_mode.height,
mode->wlr_mode.refresh,
mode->wlr_mode.preferred ? "(preferred)" : "");
wl_list_insert(wlr_conn->output.modes.prev, &mode->wlr_mode.link);
}
wlr_conn->possible_crtcs = get_possible_crtcs(drm->fd, drm_conn);
if (wlr_conn->possible_crtcs == 0) {
wlr_drm_conn_log(wlr_conn, WLR_ERROR, "No CRTC possible");
}
// TODO: this results in connectors being enabled without a mode
// set
wlr_output_update_enabled(&wlr_conn->output, wlr_conn->crtc != NULL);
wlr_conn->desired_enabled = true;
wlr_conn->status = WLR_DRM_CONN_NEEDS_MODESET;
new_outputs[new_outputs_len++] = wlr_conn;
} else if ((wlr_conn->status == WLR_DRM_CONN_CONNECTED ||
wlr_conn->status == WLR_DRM_CONN_NEEDS_MODESET) &&
drm_conn->connection != DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' disconnected", wlr_conn->name);
disconnect_drm_connector(wlr_conn);
}
drmModeFreeEncoder(curr_enc);
drmModeFreeConnector(drm_conn);
}
drmModeFreeResources(res);
// Iterate in reverse order because we'll remove items from the list and
// still want indices to remain correct.
struct wlr_drm_connector *conn, *tmp_conn;
size_t index = wl_list_length(&drm->outputs);
wl_list_for_each_reverse_safe(conn, tmp_conn, &drm->outputs, link) {
index--;
if (index >= seen_len || seen[index]) {
continue;
}
wlr_log(WLR_INFO, "'%s' disappeared", conn->name);
destroy_drm_connector(conn);
}
realloc_crtcs(drm);
for (size_t i = 0; i < new_outputs_len; ++i) {
struct wlr_drm_connector *conn = new_outputs[i];
wlr_drm_conn_log(conn, WLR_INFO, "Requesting modeset");
wlr_signal_emit_safe(&drm->backend.events.new_output,
&conn->output);
}
}
static int mhz_to_nsec(int mhz) {
return 1000000000000LL / mhz;
}
static void handle_page_flip(int fd, unsigned seq,
unsigned tv_sec, unsigned tv_usec, unsigned crtc_id, void *data) {
struct wlr_drm_backend *drm = data;
bool found = false;
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
if (conn->pending_page_flip_crtc == crtc_id) {
found = true;
break;
}
}
if (!found) {
wlr_log(WLR_DEBUG, "Unexpected page-flip event for CRTC %u", crtc_id);
return;
}
conn->pending_page_flip_crtc = 0;
if (conn->status != WLR_DRM_CONN_CONNECTED || conn->crtc == NULL) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"Ignoring page-flip event for disabled connector");
return;
}
struct wlr_drm_plane *plane = conn->crtc->primary;
if (plane->queued_fb) {
drm_fb_move(&plane->current_fb, &plane->queued_fb);
}
if (conn->crtc->cursor && conn->crtc->cursor->queued_fb) {
drm_fb_move(&conn->crtc->cursor->current_fb,
&conn->crtc->cursor->queued_fb);
}
uint32_t present_flags = WLR_OUTPUT_PRESENT_VSYNC |
WLR_OUTPUT_PRESENT_HW_CLOCK | WLR_OUTPUT_PRESENT_HW_COMPLETION;
/* Don't report ZERO_COPY in multi-gpu situations, because we had to copy
* data between the GPUs, even if we were using the direct scanout
* interface.
*/
if (!drm->parent && plane->current_fb &&
wlr_client_buffer_get(plane->current_fb->wlr_buf)) {
present_flags |= WLR_OUTPUT_PRESENT_ZERO_COPY;
}
struct timespec present_time = {
.tv_sec = tv_sec,
.tv_nsec = tv_usec * 1000,
};
struct wlr_output_event_present present_event = {
/* The DRM backend guarantees that the presentation event will be for
* the last submitted frame. */
.commit_seq = conn->output.commit_seq,
.when = &present_time,
.seq = seq,
.refresh = mhz_to_nsec(conn->output.refresh),
.flags = present_flags,
};
wlr_output_send_present(&conn->output, &present_event);
if (drm->session->active) {
wlr_output_send_frame(&conn->output);
}
}
int handle_drm_event(int fd, uint32_t mask, void *data) {
struct wlr_drm_backend *drm = data;
drmEventContext event = {
.version = 3,
.page_flip_handler2 = handle_page_flip,
};
if (drmHandleEvent(fd, &event) != 0) {
wlr_log(WLR_ERROR, "drmHandleEvent failed");
wl_display_terminate(drm->display);
}
return 1;
}
static void disconnect_drm_connector(struct wlr_drm_connector *conn) {
if (conn->status == WLR_DRM_CONN_DISCONNECTED) {
return;
}
// This will cleanup the compositor-facing wlr_output, but won't destroy
// our wlr_drm_connector.
wlr_output_destroy(&conn->output);
assert(conn->status == WLR_DRM_CONN_DISCONNECTED);
}
void destroy_drm_connector(struct wlr_drm_connector *conn) {
disconnect_drm_connector(conn);
wl_list_remove(&conn->link);
free(conn);
}
int wlr_drm_backend_get_non_master_fd(struct wlr_backend *backend) {
assert(backend);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(backend);
char *path = drmGetDeviceNameFromFd2(drm->fd);
if (!path) {
wlr_log(WLR_ERROR, "Failed to get device name from DRM fd");
return -1;
}
int fd = open(path, O_RDWR | O_CLOEXEC);
if (fd < 0) {
wlr_log_errno(WLR_ERROR, "Unable to clone DRM fd for client fd");
free(path);
return -1;
}
if (drmIsMaster(fd) && drmDropMaster(fd) < 0) {
wlr_log_errno(WLR_ERROR, "Failed to drop master");
return -1;
}
return fd;
}
/* TODO: make the function return a `wlr_drm_lease` to provide a destroy event
* that can be fired when the kernel notifies us through uevent that the lease
* has been destroyed
*/
int wlr_drm_create_lease(struct wlr_output **outputs, size_t n_outputs,
uint32_t *lessee_id) {
assert(outputs);
if (n_outputs == 0) {
wlr_log(WLR_ERROR, "Can't lease 0 outputs");
return -1;
}
struct wlr_drm_backend *drm =
get_drm_backend_from_backend(outputs[0]->backend);
int n_objects = 0;
uint32_t objects[4 * n_outputs + 1];
for (size_t i = 0; i < n_outputs; ++i) {
struct wlr_drm_connector *conn =
get_drm_connector_from_output(outputs[i]);
assert(conn->lessee_id == 0);
if (conn->backend != drm) {
wlr_log(WLR_ERROR, "Can't lease output from different backends");
return -1;
}
objects[n_objects++] = conn->id;
wlr_log(WLR_DEBUG, "Connector %d", conn->id);
if (!conn->crtc) {
wlr_log(WLR_ERROR, "Connector has no CRTC");
return -1;
}
objects[n_objects++] = conn->crtc->id;
wlr_log(WLR_DEBUG, "CRTC %d", conn->crtc->id);
objects[n_objects++] = conn->crtc->primary->id;
wlr_log(WLR_DEBUG, "Primary plane %d", conn->crtc->primary->id);
if (conn->crtc->cursor) {
wlr_log(WLR_DEBUG, "Cursor plane %d", conn->crtc->cursor->id);
objects[n_objects++] = conn->crtc->cursor->id;
}
}
assert(n_objects != 0);
wlr_log(WLR_DEBUG, "Issuing DRM lease with the %d objects", n_objects);
int lease_fd = drmModeCreateLease(drm->fd, objects, n_objects, 0,
lessee_id);
if (lease_fd < 0) {
return lease_fd;
}
wlr_log(WLR_DEBUG, "Issued DRM lease %"PRIu32, *lessee_id);
for (size_t i = 0; i < n_outputs; ++i) {
struct wlr_drm_connector *conn =
get_drm_connector_from_output(outputs[i]);
conn->lessee_id = *lessee_id;
conn->crtc->lessee_id = *lessee_id;
}
return lease_fd;
}
bool wlr_drm_backend_terminate_lease(struct wlr_backend *backend,
uint32_t lessee_id) {
wlr_log(WLR_DEBUG, "Terminating DRM lease %d", lessee_id);
assert(backend);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(backend);
int r = drmModeRevokeLease(drm->fd, lessee_id);
if (r < 0) {
wlr_log_errno(WLR_DEBUG, "Failed to terminate lease");
}
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
if (conn->lessee_id == lessee_id) {
conn->lessee_id = 0;
/* Will be re-initialized in scan_drm_connectors */
}
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (drm->crtcs[i].lessee_id == lessee_id) {
drm->crtcs[i].lessee_id = 0;
}
}
return r >= 0;
}