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backend/drm: unify connector test and commit codepaths

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There is some duplicated logic between these two functions.

The commit codepath was calling the test function before doing the
real commit, so this also saves an unnecessary test-only commit
when performing a real commit.
This commit is contained in:
Simon Ser 2024-02-16 15:25:51 +01:00 committed by Kenny Levinsen
parent 2ff3479558
commit ee01712847
1 changed files with 71 additions and 116 deletions
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187
backend/drm/drm.c
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@ -723,96 +723,6 @@ static bool drm_connector_set_pending_layer_fbs(struct wlr_drm_connector *conn,
static bool drm_connector_alloc_crtc(struct wlr_drm_connector *conn); static bool drm_connector_alloc_crtc(struct wlr_drm_connector *conn);
static bool drm_connector_test(struct wlr_output *output,
const struct wlr_output_state *state) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
if (!conn->backend->session->active) {
return false;
}
uint32_t unsupported = state->committed & ~SUPPORTED_OUTPUT_STATE;
if (unsupported != 0) {
wlr_log(WLR_DEBUG, "Unsupported output state fields: 0x%"PRIx32,
unsupported);
return false;
}
if ((state->committed & COMMIT_OUTPUT_STATE) == 0) {
// This commit doesn't change the KMS state
return true;
}
if ((state->committed & WLR_OUTPUT_STATE_ENABLED) && state->enabled) {
if (output->current_mode == NULL &&
!(state->committed & WLR_OUTPUT_STATE_MODE)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"Can't enable an output without a mode");
return false;
}
}
if (output_pending_enabled(output, state) && !drm_connector_alloc_crtc(conn)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"No CRTC available for this connector");
return false;
}
bool ok = false;
struct wlr_drm_connector_state pending = {0};
drm_connector_state_init(&pending, conn, state);
struct wlr_drm_device_state pending_dev = {0};
drm_device_state_init_single(&pending_dev, &pending);
if ((state->committed & WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED) &&
state->adaptive_sync_enabled &&
!drm_connector_supports_vrr(conn)) {
goto out;
}
if (conn->backend->parent) {
// If we're running as a secondary GPU, we can't perform an atomic
// commit without blitting a buffer.
ok = true;
goto out;
}
if (!conn->crtc) {
// If the output is disabled, we don't have a crtc even after
// reallocation
ok = true;
goto out;
}
if (state->committed & WLR_OUTPUT_STATE_BUFFER) {
if (!drm_connector_state_update_primary_fb(conn, &pending)) {
goto out;
}
if (pending.base->tearing_page_flip && !conn->backend->supports_tearing_page_flips) {
wlr_log(WLR_ERROR, "Attempted to submit a tearing page flip to an unsupported backend!");
goto out;
}
}
if (state->committed & WLR_OUTPUT_STATE_LAYERS) {
if (!drm_connector_set_pending_layer_fbs(conn, pending.base)) {
return false;
}
}
if (pending.active && !pending.primary_fb) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"No primary frame buffer available for this connector");
goto out;
}
ok = drm_commit(conn->backend, &pending_dev, 0, true);
out:
drm_connector_state_finish(&pending);
return ok;
}
bool drm_connector_supports_vrr(struct wlr_drm_connector *conn) { bool drm_connector_supports_vrr(struct wlr_drm_connector *conn) {
struct wlr_drm_backend *drm = conn->backend; struct wlr_drm_backend *drm = conn->backend;
@ -840,45 +750,89 @@ bool drm_connector_supports_vrr(struct wlr_drm_connector *conn) {
} }
static bool drm_connector_commit_state(struct wlr_drm_connector *conn, static bool drm_connector_commit_state(struct wlr_drm_connector *conn,
const struct wlr_output_state *base) { const struct wlr_output_state *state, bool test_only) {
struct wlr_drm_backend *drm = conn->backend; struct wlr_drm_backend *drm = conn->backend;
struct wlr_output *output = &conn->output;
if (!drm->session->active) { if (!drm->session->active) {
return false; return false;
} }
uint32_t unsupported = state->committed & ~SUPPORTED_OUTPUT_STATE;
if (unsupported != 0) {
wlr_log(WLR_DEBUG, "Unsupported output state fields: 0x%"PRIx32,
unsupported);
return false;
}
if (test_only && (state->committed & COMMIT_OUTPUT_STATE) == 0) {
// This commit doesn't change the KMS state
return true;
}
if ((state->committed & WLR_OUTPUT_STATE_ENABLED) && state->enabled) {
if (output->current_mode == NULL &&
!(state->committed & WLR_OUTPUT_STATE_MODE)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"Can't enable an output without a mode");
return false;
}
}
bool ok = false; bool ok = false;
struct wlr_drm_connector_state pending = {0}; struct wlr_drm_connector_state pending = {0};
drm_connector_state_init(&pending, conn, base); drm_connector_state_init(&pending, conn, state);
struct wlr_drm_device_state pending_dev = {0}; struct wlr_drm_device_state pending_dev = {0};
drm_device_state_init_single(&pending_dev, &pending); drm_device_state_init_single(&pending_dev, &pending);
if (output_pending_enabled(output, state) && !drm_connector_alloc_crtc(conn)) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"No CRTC available for this connector");
return false;
}
if ((state->committed & WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED) &&
state->adaptive_sync_enabled &&
!drm_connector_supports_vrr(conn)) {
goto out;
}
if (test_only && conn->backend->parent) {
// If we're running as a secondary GPU, we can't perform an atomic
// commit without blitting a buffer.
ok = true;
goto out;
}
if (!pending.active && conn->crtc == NULL) { if (!pending.active && conn->crtc == NULL) {
// Disabling an already-disabled connector // Disabling an already-disabled connector
ok = true; ok = true;
goto out; goto out;
} }
if (pending.active) { if (state->committed & WLR_OUTPUT_STATE_BUFFER) {
if (!drm_connector_alloc_crtc(conn)) {
wlr_drm_conn_log(conn, WLR_ERROR,
"No CRTC available for this connector");
goto out;
}
}
if (pending.base->committed & WLR_OUTPUT_STATE_BUFFER) {
if (!drm_connector_state_update_primary_fb(conn, &pending)) { if (!drm_connector_state_update_primary_fb(conn, &pending)) {
goto out; goto out;
} }
if (pending.base->tearing_page_flip && !conn->backend->supports_tearing_page_flips) {
wlr_log(WLR_ERROR, "Attempted to submit a tearing page flip to an unsupported backend!");
goto out;
}
} }
if (pending.base->committed & WLR_OUTPUT_STATE_LAYERS) { if (state->committed & WLR_OUTPUT_STATE_LAYERS) {
if (!drm_connector_set_pending_layer_fbs(conn, pending.base)) { if (!drm_connector_set_pending_layer_fbs(conn, pending.base)) {
return false; goto out;
} }
} }
if (pending_dev.modeset) { if (pending.active && !pending.primary_fb) {
wlr_drm_conn_log(conn, WLR_DEBUG,
"No primary frame buffer available for this connector");
goto out;
}
if (!test_only && pending_dev.modeset) {
if (pending.active) { if (pending.active) {
wlr_drm_conn_log(conn, WLR_INFO, "Modesetting with %dx%d @ %.3f Hz", wlr_drm_conn_log(conn, WLR_INFO, "Modesetting with %dx%d @ %.3f Hz",
pending.mode.hdisplay, pending.mode.vdisplay, pending.mode.hdisplay, pending.mode.vdisplay,
@ -892,26 +846,26 @@ static bool drm_connector_commit_state(struct wlr_drm_connector *conn,
// page-flip, either a blocking modeset. When performing a blocking modeset // 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 // we'll wait for all queued page-flips to complete, so we don't need this
// safeguard. // safeguard.
if (pending_dev.nonblock && conn->pending_page_flip != NULL) { if (!test_only && pending_dev.nonblock && conn->pending_page_flip != NULL) {
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to page-flip output: " wlr_drm_conn_log(conn, WLR_ERROR, "Failed to page-flip output: "
"a page-flip is already pending"); "a page-flip is already pending");
goto out; goto out;
} }
uint32_t flags = 0; uint32_t flags = 0;
if (pending.active) { if (!test_only && pending.active) {
flags |= DRM_MODE_PAGE_FLIP_EVENT; flags |= DRM_MODE_PAGE_FLIP_EVENT;
} }
if (pending.base->tearing_page_flip) { if (pending.base->tearing_page_flip) {
flags |= DRM_MODE_PAGE_FLIP_ASYNC; flags |= DRM_MODE_PAGE_FLIP_ASYNC;
} }
ok = drm_commit(drm, &pending_dev, flags, false); ok = drm_commit(drm, &pending_dev, flags, test_only);
if (!ok) { if (!ok) {
goto out; goto out;
} }
if (!pending.active) { if (!test_only && !pending.active) {
drm_plane_finish_surface(conn->crtc->primary); drm_plane_finish_surface(conn->crtc->primary);
drm_plane_finish_surface(conn->crtc->cursor); drm_plane_finish_surface(conn->crtc->cursor);
drm_fb_clear(&conn->cursor_pending_fb); drm_fb_clear(&conn->cursor_pending_fb);
@ -925,15 +879,16 @@ out:
return ok; return ok;
} }
static bool drm_connector_test(struct wlr_output *output,
const struct wlr_output_state *state) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
return drm_connector_commit_state(conn, state, true);
}
static bool drm_connector_commit(struct wlr_output *output, static bool drm_connector_commit(struct wlr_output *output,
const struct wlr_output_state *state) { const struct wlr_output_state *state) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output); struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
return drm_connector_commit_state(conn, state, false);
if (!drm_connector_test(output, state)) {
return false;
}
return drm_connector_commit_state(conn, state);
} }
size_t drm_crtc_get_gamma_lut_size(struct wlr_drm_backend *drm, size_t drm_crtc_get_gamma_lut_size(struct wlr_drm_backend *drm,
@ -1280,7 +1235,7 @@ static void dealloc_crtc(struct wlr_drm_connector *conn) {
struct wlr_output_state state; struct wlr_output_state state;
wlr_output_state_init(&state); wlr_output_state_init(&state);
wlr_output_state_set_enabled(&state, false); wlr_output_state_set_enabled(&state, false);
if (!drm_connector_commit_state(conn, &state)) { if (!drm_connector_commit_state(conn, &state, false)) {
// On GPU unplug, disabling the CRTC can fail with EPERM // On GPU unplug, disabling the CRTC can fail with EPERM
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to disable CRTC %"PRIu32, wlr_drm_conn_log(conn, WLR_ERROR, "Failed to disable CRTC %"PRIu32,
conn->crtc->id); conn->crtc->id);
@ -1900,7 +1855,7 @@ void restore_drm_device(struct wlr_drm_backend *drm) {
wl_list_for_each(conn, &drm->connectors, link) { wl_list_for_each(conn, &drm->connectors, link) {
struct wlr_output_state state; struct wlr_output_state state;
build_current_connector_state(&state, conn); build_current_connector_state(&state, conn);
if (!drm_connector_commit_state(conn, &state)) { if (!drm_connector_commit_state(conn, &state, false)) {
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to restore state after VT switch"); wlr_drm_conn_log(conn, WLR_ERROR, "Failed to restore state after VT switch");
} }
wlr_output_state_finish(&state); wlr_output_state_finish(&state);