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Merge pull request #1229 from emersion/drm-hotplug-fixes 

backend/drm: better hotplug handling
This commit is contained in:
Drew DeVault 2018-09-05 09:35:20 -04:00 committed by GitHub
parent 04c39a0719 8a6bdc193d
commit 8898f3199a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 255 additions and 191 deletions
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413
backend/drm/drm.c
View File

@ -404,9 +404,11 @@ static void realloc_planes(struct wlr_drm_backend *drm, const uint32_t *crtc_in,
struct wlr_drm_plane *new = &drm->type_planes[type][crtc_res[i]];
if (*old != new) {
wlr_log(WLR_DEBUG, "Assigning plane %d -> %d to CRTC %d",
wlr_log(WLR_DEBUG,
"Assigning plane %d -> %d (type %zu) to CRTC %d",
*old ? (int)(*old)->id : -1,
new ? (int)new->id : -1,
type,
c->id);
changed_outputs[crtc_res[i]] = true;
@ -420,192 +422,41 @@ static void realloc_planes(struct wlr_drm_backend *drm, const uint32_t *crtc_in,
}
}
static void realloc_crtcs(struct wlr_drm_backend *drm,
struct wlr_drm_connector *conn, bool *changed_outputs) {
uint32_t crtc[drm->num_crtcs];
uint32_t crtc_res[drm->num_crtcs];
ssize_t num_outputs = wl_list_length(&drm->outputs);
uint32_t possible_crtc[num_outputs];
for (size_t i = 0; i < drm->num_crtcs; ++i) {
crtc[i] = UNMATCHED;
}
memset(possible_crtc, 0, sizeof(possible_crtc));
wlr_log(WLR_DEBUG, "Reallocating CRTCs for output '%s'", conn->output.name);
ssize_t index = -1, i = -1;
struct wlr_drm_connector *c;
wl_list_for_each(c, &drm->outputs, link) {
i++;
if (c == conn) {
index = i;
}
wlr_log(WLR_DEBUG, "output '%s' crtc=%p state=%d",
c->output.name, c->crtc, c->state);
if (c->crtc) {
crtc[c->crtc - drm->crtcs] = i;
}
if (c->state == WLR_DRM_CONN_CONNECTED) {
possible_crtc[i] = c->possible_crtc;
}
}
assert(index != -1);
possible_crtc[index] = conn->possible_crtc;
match_obj(wl_list_length(&drm->outputs), possible_crtc,
drm->num_crtcs, crtc, crtc_res);
bool matched[num_outputs];
memset(matched, false, sizeof(matched));
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] != UNMATCHED) {
matched[crtc_res[i]] = true;
}
}
// There is no point doing anything if this monitor doesn't get activated
if (!matched[index]) {
wlr_log(WLR_DEBUG, "Could not match a CRTC for this output");
return;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
// We don't want any of the current monitors to be deactivated.
if (crtc[i] != UNMATCHED && !matched[crtc[i]]) {
wlr_log(WLR_DEBUG, "Could not match a CRTC for other output %d",
crtc[i]);
return;
}
}
changed_outputs[index] = true;
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] == UNMATCHED) {
continue;
}
if (crtc_res[i] != crtc[i]) {
changed_outputs[crtc_res[i]] = true;
struct wlr_drm_connector *c;
size_t pos = 0;
wl_list_for_each(c, &drm->outputs, link) {
if (pos == crtc_res[i]) {
break;
}
pos++;
}
c->crtc = &drm->crtcs[i];
wlr_log(WLR_DEBUG, "Assigning CRTC %d to output '%s'",
drm->crtcs[i].id, c->output.name);
}
}
realloc_planes(drm, crtc_res, changed_outputs);
}
static uint32_t get_possible_crtcs(int fd, uint32_t conn_id) {
drmModeConnector *conn = drmModeGetConnector(fd, conn_id);
if (!conn) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM connector");
return 0;
}
if (conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0) {
wlr_log(WLR_ERROR, "Output is not connected");
goto error_conn;
}
drmModeEncoder *enc = NULL;
for (int i = 0; !enc && i < conn->count_encoders; ++i) {
enc = drmModeGetEncoder(fd, conn->encoders[i]);
}
if (!enc) {
wlr_log(WLR_ERROR, "Failed to get DRM encoder");
goto error_conn;
}
uint32_t ret = enc->possible_crtcs;
drmModeFreeEncoder(enc);
drmModeFreeConnector(conn);
return ret;
error_conn:
drmModeFreeConnector(conn);
return 0;
}
static void drm_connector_cleanup(struct wlr_drm_connector *conn);
static bool drm_connector_set_mode(struct wlr_output *output,
struct wlr_output_mode *mode) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
bool changed_outputs[wl_list_length(&drm->outputs)];
wlr_log(WLR_INFO, "Modesetting '%s' with '%ux%u@%u mHz'", conn->output.name,
mode->width, mode->height, mode->refresh);
conn->possible_crtc = get_possible_crtcs(drm->fd, conn->id);
if (conn->possible_crtc == 0) {
goto error_conn;
}
memset(changed_outputs, false, sizeof(changed_outputs));
realloc_crtcs(drm, conn, changed_outputs);
struct wlr_drm_crtc *crtc = conn->crtc;
if (!crtc) {
wlr_log(WLR_ERROR, "Unable to match %s with a CRTC", conn->output.name);
if (conn->crtc == NULL) {
wlr_log(WLR_ERROR, "Cannot modeset '%s': no CRTC for this connector",
conn->output.name);
// Save the desired mode for later, when we'll get a proper CRTC
conn->desired_mode = mode;
return false;
}
wlr_log(WLR_INFO, "Modesetting '%s' with '%ux%u@%u mHz'",
conn->output.name, mode->width, mode->height, mode->refresh);
if (!init_drm_plane_surfaces(conn->crtc->primary, drm,
mode->width, mode->height, GBM_FORMAT_XRGB8888)) {
wlr_log(WLR_ERROR, "Failed to initialize renderer for plane");
return false;
}
wlr_log(WLR_DEBUG, "%s: crtc=%td ovr=%td pri=%td cur=%td", conn->output.name,
crtc - drm->crtcs,
crtc->overlay ? crtc->overlay - drm->overlay_planes : -1,
crtc->primary ? crtc->primary - drm->primary_planes : -1,
crtc->cursor ? crtc->cursor - drm->cursor_planes : -1);
conn->state = WLR_DRM_CONN_CONNECTED;
conn->desired_mode = NULL;
wlr_output_update_mode(&conn->output, mode);
wlr_output_update_enabled(&conn->output, true);
drm_connector_start_renderer(conn);
// 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);
// Since realloc_crtcs can deallocate planes on OTHER outputs,
// we actually need to reinitialize any that has changed
ssize_t output_index = -1;
wl_list_for_each(conn, &drm->outputs, link) {
output_index++;
struct wlr_output_mode *mode = conn->output.current_mode;
struct wlr_drm_crtc *crtc = conn->crtc;
if (conn->state != WLR_DRM_CONN_CONNECTED ||
!changed_outputs[output_index]) {
continue;
}
if (!init_drm_plane_surfaces(crtc->primary, drm,
mode->width, mode->height, GBM_FORMAT_XRGB8888)) {
wlr_log(WLR_ERROR, "Failed to initialize renderer for plane");
goto error_conn;
}
drm_connector_start_renderer(conn);
}
return true;
error_conn:
drm_connector_cleanup(conn);
return false;
}
bool wlr_drm_connector_add_mode(struct wlr_output *output,
@ -855,6 +706,172 @@ static const int32_t subpixel_map[] = {
[DRM_MODE_SUBPIXEL_NONE] = WL_OUTPUT_SUBPIXEL_NONE,
};
static void dealloc_crtc(struct wlr_drm_connector *conn) {
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)conn->output.backend;
if (conn->crtc == NULL) {
return;
}
wlr_log(WLR_DEBUG, "De-allocating CRTC %zu for output '%s'",
conn->crtc - drm->crtcs, conn->output.name);
for (size_t type = 0; type < 3; ++type) {
struct wlr_drm_plane *plane = conn->crtc->planes[type];
if (plane == NULL) {
continue;
}
finish_drm_surface(&plane->surf);
conn->crtc->planes[type] = NULL;
}
drm->iface->conn_enable(drm, conn, false);
conn->crtc = NULL;
}
void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs) {
size_t num_outputs = wl_list_length(&drm->outputs);
wlr_log(WLR_DEBUG, "Reallocating CRTCs");
uint32_t crtc[drm->num_crtcs];
for (size_t i = 0; i < drm->num_crtcs; ++i) {
crtc[i] = UNMATCHED;
}
uint32_t possible_crtc[num_outputs];
memset(possible_crtc, 0, sizeof(possible_crtc));
wlr_log(WLR_DEBUG, "State before reallocation:");
ssize_t i = -1;
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
i++;
wlr_log(WLR_DEBUG, " '%s' crtc=%d state=%d", conn->output.name,
conn->crtc ? (int)(conn->crtc - drm->crtcs) : -1, conn->state);
if (conn->crtc) {
crtc[conn->crtc - drm->crtcs] = i;
}
if (conn->state == WLR_DRM_CONN_CONNECTED ||
conn->state == WLR_DRM_CONN_NEEDS_MODESET) {
possible_crtc[i] = conn->possible_crtc;
}
}
uint32_t crtc_res[drm->num_crtcs];
match_obj(wl_list_length(&drm->outputs), possible_crtc,
drm->num_crtcs, crtc, crtc_res);
bool matched[num_outputs];
memset(matched, false, sizeof(matched));
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] != UNMATCHED) {
matched[crtc_res[i]] = true;
}
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
// We don't want any of the current monitors to be deactivated
if (crtc[i] != UNMATCHED && !matched[crtc[i]]) {
wlr_log(WLR_DEBUG, "Could not match a CRTC for connected output %d",
crtc[i]);
return;
}
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] == UNMATCHED) {
continue;
}
if (crtc_res[i] != crtc[i]) {
changed_outputs[crtc_res[i]] = true;
struct wlr_drm_connector *c;
size_t pos = 0;
wl_list_for_each(c, &drm->outputs, link) {
if (pos == crtc_res[i]) {
break;
}
pos++;
}
dealloc_crtc(c);
c->crtc = &drm->crtcs[i];
wlr_log(WLR_DEBUG, "Assigning CRTC %zu to output %d -> %d '%s'",
i, crtc[i], crtc_res[i], c->output.name);
}
}
wlr_log(WLR_DEBUG, "State after reallocation:");
wl_list_for_each(conn, &drm->outputs, link) {
wlr_log(WLR_DEBUG, " '%s' crtc=%d state=%d", conn->output.name,
conn->crtc ? (int)(conn->crtc - drm->crtcs) : -1, conn->state);
}
realloc_planes(drm, crtc_res, changed_outputs);
// We need to reinitialize any plane that has changed
i = -1;
wl_list_for_each(conn, &drm->outputs, link) {
i++;
struct wlr_output_mode *mode = conn->output.current_mode;
if (conn->state != WLR_DRM_CONN_CONNECTED || !changed_outputs[i]) {
continue;
}
assert(conn->crtc);
if (!init_drm_plane_surfaces(conn->crtc->primary, drm,
mode->width, mode->height, GBM_FORMAT_XRGB8888)) {
wlr_log(WLR_ERROR, "Failed to initialize renderer for plane");
drm_connector_cleanup(conn);
break;
}
drm_connector_start_renderer(conn);
wlr_output_damage_whole(&conn->output);
}
}
static uint32_t get_possible_crtcs(int fd, uint32_t conn_id) {
drmModeConnector *conn = drmModeGetConnector(fd, conn_id);
if (!conn) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM connector");
return 0;
}
if (conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0) {
wlr_log(WLR_ERROR, "Output is not connected");
goto error_conn;
}
drmModeEncoder *enc = NULL;
for (int i = 0; !enc && i < conn->count_encoders; ++i) {
enc = drmModeGetEncoder(fd, conn->encoders[i]);
}
if (!enc) {
wlr_log(WLR_ERROR, "Failed to get DRM encoder");
goto error_conn;
}
uint32_t ret = enc->possible_crtcs;
drmModeFreeEncoder(enc);
drmModeFreeConnector(conn);
return ret;
error_conn:
drmModeFreeConnector(conn);
return 0;
}
void scan_drm_connectors(struct wlr_drm_backend *drm) {
wlr_log(WLR_INFO, "Scanning DRM connectors");
@ -910,17 +927,16 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
wlr_conn->state = WLR_DRM_CONN_DISCONNECTED;
wlr_conn->id = drm_conn->connector_id;
snprintf(wlr_conn->output.name, sizeof(wlr_conn->output.name),
"%s-%"PRIu32, conn_get_name(drm_conn->connector_type),
drm_conn->connector_type_id);
if (curr_enc) {
wlr_conn->old_crtc = drmModeGetCrtc(drm->fd, curr_enc->crtc_id);
}
snprintf(wlr_conn->output.name, sizeof(wlr_conn->output.name),
"%s-%"PRIu32,
conn_get_name(drm_conn->connector_type),
drm_conn->connector_type_id);
wl_list_insert(&drm->outputs, &wlr_conn->link);
wlr_log(WLR_INFO, "Found display '%s'", wlr_conn->output.name);
wlr_log(WLR_INFO, "Found connector '%s'", wlr_conn->output.name);
} else {
seen[index] = true;
}
@ -976,6 +992,12 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
wl_list_insert(&wlr_conn->output.modes, &mode->wlr_mode.link);
}
wlr_conn->possible_crtc = get_possible_crtcs(drm->fd, wlr_conn->id);
if (wlr_conn->possible_crtc == 0) {
wlr_log(WLR_ERROR, "No CRTC possible for connector '%s'",
wlr_conn->output.name);
}
wlr_output_update_enabled(&wlr_conn->output, wlr_conn->crtc != NULL);
wlr_conn->state = WLR_DRM_CONN_NEEDS_MODESET;
@ -984,7 +1006,6 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
drm_conn->connection != DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' disconnected", wlr_conn->output.name);
wlr_output_update_enabled(&wlr_conn->output, false);
drm_connector_cleanup(wlr_conn);
}
@ -1011,6 +1032,26 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
free(conn);
}
bool changed_outputs[wl_list_length(&drm->outputs)];
memset(changed_outputs, false, sizeof(changed_outputs));
for (size_t i = 0; i < new_outputs_len; ++i) {
struct wlr_drm_connector *conn = new_outputs[i];
ssize_t pos = -1;
struct wlr_drm_connector *c;
wl_list_for_each(c, &drm->outputs, link) {
++pos;
if (c == conn) {
break;
}
}
assert(pos >= 0);
changed_outputs[pos] = true;
}
realloc_crtcs(drm, changed_outputs);
for (size_t i = 0; i < new_outputs_len; ++i) {
struct wlr_drm_connector *conn = new_outputs[i];
@ -1019,6 +1060,15 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
wlr_signal_emit_safe(&drm->backend.events.new_output,
&conn->output);
}
// Try to modeset any output that has a desired mode and a CRTC (ie. was
// lacking a CRTC on last modeset)
wl_list_for_each(conn, &drm->outputs, link) {
if (conn->state == WLR_DRM_CONN_NEEDS_MODESET && conn->crtc != NULL &&
conn->desired_mode != NULL) {
drm_connector_set_mode(&conn->output, conn->desired_mode);
}
}
}
static void page_flip_handler(int fd, unsigned seq,
@ -1114,23 +1164,28 @@ static void drm_connector_cleanup(struct wlr_drm_connector *conn) {
}
conn->output.current_mode = NULL;
conn->desired_mode = NULL;
struct wlr_drm_mode *mode, *tmp;
wl_list_for_each_safe(mode, tmp, &conn->output.modes, wlr_mode.link) {
wl_list_remove(&mode->wlr_mode.link);
free(mode);
}
conn->output.enabled = false;
conn->output.width = conn->output.height = conn->output.refresh = 0;
memset(&conn->output.make, 0, sizeof(conn->output.make));
memset(&conn->output.model, 0, sizeof(conn->output.model));
memset(&conn->output.serial, 0, sizeof(conn->output.serial));
conn->crtc = NULL;
conn->possible_crtc = 0;
conn->pageflip_pending = false;
/* Fallthrough */
case WLR_DRM_CONN_NEEDS_MODESET:
wlr_log(WLR_INFO, "Emitting destruction signal for '%s'",
conn->output.name);
dealloc_crtc(conn);
conn->possible_crtc = 0;
conn->desired_mode = NULL;
wlr_signal_emit_safe(&conn->output.events.destroy, &conn->output);
break;
case WLR_DRM_CONN_DISCONNECTED:

29
backend/drm/util.c
View File

@ -228,9 +228,6 @@ static bool match_obj_(struct match_state *st, size_t skips, size_t score, size_
st->replaced = replaced;
memcpy(st->best, st->res, sizeof(st->best[0]) * st->num_res);
if (st->score == st->num_objs && st->replaced == 0) {
st->exit_early = true;
}
st->exit_early = (st->score == st->num_res - skips
|| st->score == st->num_objs)
&& st->replaced == 0;
@ -250,37 +247,44 @@ static bool match_obj_(struct match_state *st, size_t skips, size_t score, size_
* Attempt to use the current solution first, to try and avoid
* recalculating everything
*/
if (st->orig[i] != UNMATCHED && !is_taken(i, st->res, st->orig[i])) {
st->res[i] = st->orig[i];
if (match_obj_(st, skips, score + 1, replaced, i + 1)) {
return true;
}
}
if (st->orig[i] == UNMATCHED) {
st->res[i] = UNMATCHED;
match_obj_(st, skips, score, replaced, i + 1);
if (st->exit_early) {
return true;
}
}
if (st->orig[i] != UNMATCHED) {
++replaced;
}
bool is_best = false;
for (st->res[i] = 0; st->res[i] < st->num_objs; ++st->res[i]) {
bool has_best = false;
for (size_t candidate = 0; candidate < st->num_objs; ++candidate) {
// We tried this earlier
if (st->res[i] == st->orig[i]) {
if (candidate == st->orig[i]) {
continue;
}
// Not compatible
if (!(st->objs[st->res[i]] & (1 << i))) {
if (!(st->objs[candidate] & (1 << i))) {
continue;
}
// Already taken
if (is_taken(i, st->res, st->res[i])) {
if (is_taken(i, st->res, candidate)) {
continue;
}
st->res[i] = candidate;
if (match_obj_(st, skips, score + 1, replaced, i + 1)) {
is_best = true;
has_best = true;
}
if (st->exit_early) {
@ -288,7 +292,7 @@ static bool match_obj_(struct match_state *st, size_t skips, size_t score, size_
}
}
if (is_best) {
if (has_best) {
return true;
}
@ -301,6 +305,9 @@ size_t match_obj(size_t num_objs, const uint32_t objs[static restrict num_objs],
size_t num_res, const uint32_t res[static restrict num_res],
uint32_t out[static restrict num_res]) {
uint32_t solution[num_res];
for (size_t i = 0; i < num_res; ++i) {
solution[i] = UNMATCHED;
}
struct match_state st = {
.num_objs = num_objs,

1
include/backend/drm/drm.h
View File

@ -119,6 +119,7 @@ struct wlr_drm_connector {
struct wlr_output output;
enum wlr_drm_connector_state state;
struct wlr_output_mode *desired_mode;
uint32_t id;
struct wlr_drm_crtc *crtc;

3
types/wlr_output.c
View File

@ -768,7 +768,8 @@ bool wlr_output_cursor_set_image(struct wlr_output_cursor *cursor,
return true;
}
wlr_log(WLR_DEBUG, "Falling back to software cursor");
wlr_log(WLR_DEBUG, "Falling back to software cursor on output '%s'",
cursor->output->name);
output_cursor_damage_whole(cursor);
return true;
}