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backend/drm: add wlr_drm_connector_state.nonblock

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Instead of having this condition checked in multiple places,
centralize it so that they don't go out-of-sync.
This commit is contained in:
Simon Ser 2023-11-19 15:16:20 +01:00
parent f47b6e3fce
commit 8c44e86077
4 changed files with 22 additions and 22 deletions
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8
backend/drm/atomic.c
View file

@ -315,12 +315,8 @@ static bool atomic_crtc_commit(struct wlr_drm_connector *conn,
}
if (modeset) {
flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
} else if (!test_only && (state->base->committed & WLR_OUTPUT_STATE_BUFFER)) {
// The wlr_output API requires non-modeset commits with a new buffer to
// wait for the frame event. However compositors often perform
// non-modesets commits without a new buffer without waiting for the
// frame event. In that case we need to make the KMS commit blocking,
// otherwise the kernel will error out with EBUSY.
}
if (!test_only && state->nonblock) {
flags |= DRM_MODE_ATOMIC_NONBLOCK;
}

27
backend/drm/drm.c
View file

@ -489,6 +489,13 @@ static void drm_connector_state_init(struct wlr_drm_connector_state *state,
.modeset = base->allow_reconfiguration,
.active = (base->committed & WLR_OUTPUT_STATE_ENABLED) ?
base->enabled : conn->output.enabled,
// The wlr_output API requires non-modeset commits with a new buffer to
// wait for the frame event. However compositors often perform
// non-modesets commits without a new buffer without waiting for the
// frame event. In that case we need to make the KMS commit blocking,
// otherwise the kernel will error out with EBUSY.
.nonblock = !base->allow_reconfiguration &&
(base->committed & WLR_OUTPUT_STATE_BUFFER),
};
struct wlr_output_mode *mode = conn->output.current_mode;
@ -763,16 +770,6 @@ bool drm_connector_commit_state(struct wlr_drm_connector *conn,
if (!drm_connector_state_update_primary_fb(conn, &pending)) {
goto out;
}
// 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 != NULL && !pending.modeset) {
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to page-flip output: "
"a page-flip is already pending");
goto out;
}
}
if (pending.base->committed & WLR_OUTPUT_STATE_LAYERS) {
if (!drm_connector_set_pending_layer_fbs(conn, pending.base)) {
@ -790,6 +787,16 @@ bool drm_connector_commit_state(struct wlr_drm_connector *conn,
}
}
// 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 (pending.nonblock && conn->pending_page_flip != NULL) {
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to page-flip output: "
"a page-flip is already pending");
goto out;
}
uint32_t flags = 0;
if (pending.active) {
flags |= DRM_MODE_PAGE_FLIP_EVENT;

8
backend/drm/libliftoff.c
View file

@ -368,12 +368,8 @@ static bool crtc_commit(struct wlr_drm_connector *conn,
}
if (modeset) {
flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
} else if (!test_only && (state->base->committed & WLR_OUTPUT_STATE_BUFFER)) {
// The wlr_output API requires non-modeset commits with a new buffer to
// wait for the frame event. However compositors often perform
// non-modesets commits without a new buffer without waiting for the
// frame event. In that case we need to make the KMS commit blocking,
// otherwise the kernel will error out with EBUSY.
}
if (!test_only && state->nonblock) {
flags |= DRM_MODE_ATOMIC_NONBLOCK;
}

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

@ -126,6 +126,7 @@ struct wlr_drm_mode {
struct wlr_drm_connector_state {
const struct wlr_output_state *base;
bool modeset;
bool nonblock;
bool active;
drmModeModeInfo mode;
struct wlr_drm_fb *primary_fb;