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Merge pull request #1237 from emersion/disabled-crtc 

Steal CRTCs from disabled outputs
This commit is contained in:
Drew DeVault 2018-09-16 10:02:50 -04:00 committed by GitHub
parent df991a55ab f8a50e4fe7
commit 83397e6999
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 109 additions and 55 deletions
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3
backend/drm/atomic.c
View File

@ -129,6 +129,9 @@ static bool atomic_crtc_pageflip(struct wlr_drm_backend *drm,
static bool atomic_conn_enable(struct wlr_drm_backend *drm,
struct wlr_drm_connector *conn, bool enable) {
struct wlr_drm_crtc *crtc = conn->crtc;
if (crtc == NULL) {
return !enable;
}
struct atomic atom;
atomic_begin(crtc, &atom);

120
backend/drm/drm.c
View File

@ -342,14 +342,39 @@ static void drm_connector_start_renderer(struct wlr_drm_connector *conn) {
}
}
static bool drm_connector_set_mode(struct wlr_output *output,
struct wlr_output_mode *mode);
static void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs);
static void attempt_enable_needs_modeset(struct wlr_drm_backend *drm) {
// Try to modeset any output that has a desired mode and a CRTC (ie. was
// lacking a CRTC on last modeset)
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
if (conn->state == WLR_DRM_CONN_NEEDS_MODESET &&
conn->crtc != NULL && conn->desired_mode != NULL &&
conn->desired_enabled) {
drm_connector_set_mode(&conn->output, conn->desired_mode);
}
}
}
bool enable_drm_connector(struct wlr_output *output, bool enable) {
struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
if (conn->state != WLR_DRM_CONN_CONNECTED
&& conn->state != WLR_DRM_CONN_NEEDS_MODESET) {
return false;
}
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
conn->desired_enabled = enable;
if (enable && conn->crtc == NULL) {
// Maybe we can steal a CRTC from a disabled output
realloc_crtcs(drm, NULL);
}
bool ok = drm->iface->conn_enable(drm, conn, enable);
if (!ok) {
return false;
@ -357,6 +382,10 @@ bool enable_drm_connector(struct wlr_output *output, bool enable) {
if (enable) {
drm_connector_start_renderer(conn);
} else {
realloc_crtcs(drm, NULL);
attempt_enable_needs_modeset(drm);
}
wlr_output_update_enabled(&conn->output, enable);
@ -429,6 +458,10 @@ 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;
if (conn->crtc == NULL) {
// Maybe we can steal a CRTC from a disabled output
realloc_crtcs(drm, NULL);
}
if (conn->crtc == NULL) {
wlr_log(WLR_ERROR, "Cannot modeset '%s': no CRTC for this connector",
conn->output.name);
@ -450,6 +483,7 @@ static bool drm_connector_set_mode(struct wlr_output *output,
conn->desired_mode = NULL;
wlr_output_update_mode(&conn->output, mode);
wlr_output_update_enabled(&conn->output, true);
conn->desired_enabled = true;
drm_connector_start_renderer(conn);
@ -731,17 +765,27 @@ static void dealloc_crtc(struct wlr_drm_connector *conn) {
conn->crtc = NULL;
}
void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs) {
static void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs) {
size_t num_outputs = wl_list_length(&drm->outputs);
if (changed_outputs == NULL) {
changed_outputs = calloc(num_outputs, sizeof(bool));
if (changed_outputs == NULL) {
wlr_log(WLR_ERROR, "Allocation failed");
return;
}
}
wlr_log(WLR_DEBUG, "Reallocating CRTCs");
uint32_t crtc[drm->num_crtcs];
uint32_t crtc[drm->num_crtcs + 1];
for (size_t i = 0; i < drm->num_crtcs; ++i) {
crtc[i] = UNMATCHED;
}
uint32_t possible_crtc[num_outputs];
struct wlr_drm_connector *connectors[num_outputs + 1];
uint32_t possible_crtc[num_outputs + 1];
memset(possible_crtc, 0, sizeof(possible_crtc));
wlr_log(WLR_DEBUG, "State before reallocation:");
@ -749,25 +793,31 @@ void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs) {
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
i++;
connectors[i] = conn;
wlr_log(WLR_DEBUG, " '%s' crtc=%d state=%d", conn->output.name,
conn->crtc ? (int)(conn->crtc - drm->crtcs) : -1, conn->state);
wlr_log(WLR_DEBUG, " '%s' crtc=%d state=%d desired_enabled=%d",
conn->output.name,
conn->crtc ? (int)(conn->crtc - drm->crtcs) : -1,
conn->state, conn->desired_enabled);
if (conn->crtc) {
crtc[conn->crtc - drm->crtcs] = i;
}
if (conn->state == WLR_DRM_CONN_CONNECTED ||
conn->state == WLR_DRM_CONN_NEEDS_MODESET) {
// Only search CRTCs for user-enabled outputs (that are already
// connected or in need of a modeset)
if ((conn->state == WLR_DRM_CONN_CONNECTED ||
conn->state == WLR_DRM_CONN_NEEDS_MODESET) &&
conn->desired_enabled) {
possible_crtc[i] = conn->possible_crtc;
}
}
uint32_t crtc_res[drm->num_crtcs];
uint32_t crtc_res[drm->num_crtcs + 1];
match_obj(wl_list_length(&drm->outputs), possible_crtc,
drm->num_crtcs, crtc, crtc_res);
bool matched[num_outputs];
bool matched[num_outputs + 1];
memset(matched, false, sizeof(matched));
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] != UNMATCHED) {
@ -777,34 +827,30 @@ void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs) {
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]]) {
if (crtc[i] != UNMATCHED && !matched[crtc[i]] &&
connectors[crtc[i]]->desired_enabled) {
wlr_log(WLR_DEBUG, "Could not match a CRTC for connected output %d",
crtc[i]);
return;
}
}
struct wlr_drm_connector *connectors[num_outputs];
i = 0;
wl_list_for_each(conn, &drm->outputs, link) {
connectors[i] = conn;
i++;
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (crtc_res[i] == UNMATCHED) {
// De-allocate CRTCs we don't use anymore
if (crtc[i] != UNMATCHED) {
dealloc_crtc(connectors[crtc[i]]);
}
if (crtc_res[i] == crtc[i]) {
continue;
}
if (crtc_res[i] != crtc[i]) {
// De-allocate this CRTC on previous output
if (crtc[i] != UNMATCHED) {
changed_outputs[crtc[i]] = true;
dealloc_crtc(connectors[crtc[i]]);
}
// Assign this CRTC to next output
if (crtc_res[i] != UNMATCHED) {
changed_outputs[crtc_res[i]] = true;
struct wlr_drm_connector *conn = connectors[crtc_res[i]];
dealloc_crtc(conn);
conn->crtc = &drm->crtcs[i];
@ -815,8 +861,10 @@ void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs) {
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);
wlr_log(WLR_DEBUG, " '%s' crtc=%d state=%d desired_enabled=%d",
conn->output.name,
conn->crtc ? (int)(conn->crtc - drm->crtcs) : -1,
conn->state, conn->desired_enabled);
}
realloc_planes(drm, crtc_res, changed_outputs);
@ -827,10 +875,10 @@ void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs) {
i++;
struct wlr_output_mode *mode = conn->output.current_mode;
if (conn->state != WLR_DRM_CONN_CONNECTED || !changed_outputs[i]) {
if (conn->state != WLR_DRM_CONN_CONNECTED || !changed_outputs[i]
|| conn->crtc == NULL) {
continue;
}
assert(conn->crtc);
if (!init_drm_plane_surfaces(conn->crtc->primary, drm,
mode->width, mode->height, GBM_FORMAT_XRGB8888)) {
@ -1004,6 +1052,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
}
wlr_output_update_enabled(&wlr_conn->output, wlr_conn->crtc != NULL);
wlr_conn->desired_enabled = true;
wlr_conn->state = WLR_DRM_CONN_NEEDS_MODESET;
new_outputs[new_outputs_len++] = wlr_conn;
@ -1066,14 +1115,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
&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);
}
}
attempt_enable_needs_modeset(drm);
}
static void page_flip_handler(int fd, unsigned seq,
@ -1082,7 +1124,7 @@ static void page_flip_handler(int fd, unsigned seq,
struct wlr_drm_backend *drm = (struct wlr_drm_backend *)conn->output.backend;
conn->pageflip_pending = false;
if (conn->state != WLR_DRM_CONN_CONNECTED) {
if (conn->state != WLR_DRM_CONN_CONNECTED || conn->crtc == NULL) {
return;
}
@ -1155,6 +1197,7 @@ static void drm_connector_cleanup(struct wlr_drm_connector *conn) {
case WLR_DRM_CONN_CONNECTED:
case WLR_DRM_CONN_CLEANUP:;
struct wlr_drm_crtc *crtc = conn->crtc;
if (crtc != NULL) {
for (int i = 0; i < 3; ++i) {
if (!crtc->planes[i]) {
continue;
@ -1167,6 +1210,7 @@ static void drm_connector_cleanup(struct wlr_drm_connector *conn) {
crtc->planes[i] = NULL;
}
}
}
conn->output.current_mode = NULL;
conn->desired_mode = NULL;

20
backend/drm/util.c
View File

@ -223,7 +223,8 @@ struct match_state {
static bool match_obj_(struct match_state *st, size_t skips, size_t score, size_t replaced, size_t i) {
// Finished
if (i >= st->num_res) {
if (score > st->score || (score == st->score && replaced < st->replaced)) {
if (score > st->score ||
(score == st->score && replaced < st->replaced)) {
st->score = score;
st->replaced = replaced;
memcpy(st->best, st->res, sizeof(st->best[0]) * st->num_res);
@ -243,29 +244,33 @@ static bool match_obj_(struct match_state *st, size_t skips, size_t score, size_
return match_obj_(st, skips + 1, score, replaced, i + 1);
}
bool has_best = false;
/*
* 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;
size_t obj_score = st->objs[st->res[i]] != 0 ? 1 : 0;
if (match_obj_(st, skips, score + obj_score, replaced, i + 1)) {
has_best = true;
}
}
if (st->orig[i] == UNMATCHED) {
st->res[i] = UNMATCHED;
match_obj_(st, skips, score, replaced, i + 1);
if (match_obj_(st, skips, score, replaced, i + 1)) {
has_best = true;
}
}
if (st->exit_early) {
return true;
}
}
if (st->orig[i] != UNMATCHED) {
++replaced;
}
bool has_best = false;
for (size_t candidate = 0; candidate < st->num_objs; ++candidate) {
// We tried this earlier
if (candidate == st->orig[i]) {
@ -283,7 +288,8 @@ static bool match_obj_(struct match_state *st, size_t skips, size_t score, size_
}
st->res[i] = candidate;
if (match_obj_(st, skips, score + 1, replaced, i + 1)) {
size_t obj_score = st->objs[candidate] != 0 ? 1 : 0;
if (match_obj_(st, skips, score + obj_score, replaced, i + 1)) {
has_best = true;
}

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

@ -120,6 +120,7 @@ struct wlr_drm_connector {
enum wlr_drm_connector_state state;
struct wlr_output_mode *desired_mode;
bool desired_enabled;
uint32_t id;
struct wlr_drm_crtc *crtc;