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backend/drm: hold buffers while scanning out

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This commit is contained in:
Simon Ser 2019-05-04 12:07:37 +03:00 • committed by Drew DeVault
parent ff6b352d75
commit 44ba603c0e
2 changed files with 30 additions and 5 deletions
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24
backend/drm/drm.c
View file

@ -350,6 +350,11 @@ static bool drm_connector_commit(struct wlr_output *output) {
} }
conn->pageflip_pending = true; conn->pageflip_pending = true;
if (output->pending.buffer_type == WLR_OUTPUT_STATE_BUFFER_SCANOUT) {
wlr_buffer_unref(conn->pending_buffer);
conn->pending_buffer = wlr_buffer_ref(output->pending.buffer);
}
wlr_output_update_enabled(output, true); wlr_output_update_enabled(output, true);
return true; return true;
} }
@ -1440,10 +1445,22 @@ static void page_flip_handler(int fd, unsigned seq,
return; return;
} }
// Release the old buffer as it's not displayed anymore. The pending
// buffer becomes the current buffer.
wlr_buffer_unref(conn->current_buffer);
conn->current_buffer = conn->pending_buffer;
conn->pending_buffer = NULL;
uint32_t present_flags = WLR_OUTPUT_PRESENT_VSYNC |
WLR_OUTPUT_PRESENT_HW_CLOCK | WLR_OUTPUT_PRESENT_HW_COMPLETION;
if (conn->current_buffer != NULL) {
present_flags |= WLR_OUTPUT_PRESENT_ZERO_COPY;
} else {
post_drm_surface(&conn->crtc->primary->surf); post_drm_surface(&conn->crtc->primary->surf);
if (drm->parent) { if (drm->parent) {
post_drm_surface(&conn->crtc->primary->mgpu_surf); post_drm_surface(&conn->crtc->primary->mgpu_surf);
} }
}
struct timespec present_time = { struct timespec present_time = {
.tv_sec = tv_sec, .tv_sec = tv_sec,
@ -1453,8 +1470,7 @@ static void page_flip_handler(int fd, unsigned seq,
.when = &present_time, .when = &present_time,
.seq = seq, .seq = seq,
.refresh = mhz_to_nsec(conn->output.refresh), .refresh = mhz_to_nsec(conn->output.refresh),
.flags = WLR_OUTPUT_PRESENT_VSYNC | WLR_OUTPUT_PRESENT_HW_CLOCK | .flags = present_flags,
WLR_OUTPUT_PRESENT_HW_COMPLETION,
}; };
wlr_output_send_present(&conn->output, &present_event); wlr_output_send_present(&conn->output, &present_event);
@ -1559,6 +1575,10 @@ static void drm_connector_cleanup(struct wlr_drm_connector *conn) {
conn->output.needs_frame = false; conn->output.needs_frame = false;
conn->output.frame_pending = false; conn->output.frame_pending = false;
wlr_buffer_unref(conn->pending_buffer);
wlr_buffer_unref(conn->current_buffer);
conn->pending_buffer = conn->current_buffer = NULL;
/* Fallthrough */ /* Fallthrough */
case WLR_DRM_CONN_NEEDS_MODESET: case WLR_DRM_CONN_NEEDS_MODESET:
wlr_log(WLR_INFO, "Emitting destruction signal for '%s'", wlr_log(WLR_INFO, "Emitting destruction signal for '%s'",

5
include/backend/drm/drm.h
View file

@ -149,7 +149,12 @@ struct wlr_drm_connector {
struct wl_event_source *retry_pageflip; struct wl_event_source *retry_pageflip;
struct wl_list link; struct wl_list link;
// DMA-BUF to be displayed on next commit
struct wlr_dmabuf_attributes pending_dmabuf; struct wlr_dmabuf_attributes pending_dmabuf;
// Buffer submitted to the kernel but not yet displayed
struct wlr_buffer *pending_buffer;
// Buffer currently being displayed
struct wlr_buffer *current_buffer;
}; };
struct wlr_drm_backend *get_drm_backend_from_backend( struct wlr_drm_backend *get_drm_backend_from_backend(