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output: fix crash when re-enabling DRM output

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The output is disabled then re-enabled using the wlr-output-management
protocol with tool such as wlr-randr.

$ wlr-randr --output HDMI-A-1 --off
$ wlr-randr --output HDMI-A-1 --on

When re-enabled the new output configuration is committed before the
output to be added to the global output layout. However,
handle_output_commit() expects the output to be already part of this
global layout and assert failed. Now, do not treat this in
handle_output_commit() and simply ensure the resulting scene output is
not NULL in handle_output_frame().
This commit is contained in:
Jonathan GUILLOT 2023-09-12 14:09:24 +00:00 • committed by Simon Ser
parent a769943447
commit 4dc3cf80b2
1 changed files with 31 additions and 20 deletions
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51
output.c
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@ -68,6 +68,29 @@ update_output_manager_config(struct cg_server *server)
wlr_output_manager_v1_set_configuration(server->output_manager_v1, config);
}
static inline void
output_layout_add_auto(struct cg_output *output)
{
wlr_output_layout_add_auto(output->server->output_layout, output->wlr_output);
output->scene_output = wlr_scene_get_scene_output(output->server->scene, output->wlr_output);
assert(output->scene_output != NULL);
}
static inline void
output_layout_add(struct cg_output *output, int32_t x, int32_t y)
{
wlr_output_layout_add(output->server->output_layout, output->wlr_output, x, y);
output->scene_output = wlr_scene_get_scene_output(output->server->scene, output->wlr_output);
assert(output->scene_output != NULL);
}
static inline void
output_layout_remove(struct cg_output *output)
{
wlr_output_layout_remove(output->server->output_layout, output->wlr_output);
output->scene_output = NULL;
}
static void
output_enable(struct cg_output *output)
{
@ -78,12 +101,11 @@ output_enable(struct cg_output *output)
* duplicate the enabled property in cg_output. */
wlr_log(WLR_DEBUG, "Enabling output %s", wlr_output->name);
wlr_output_layout_add_auto(output->server->output_layout, wlr_output);
wlr_output_enable(wlr_output, true);
wlr_output_commit(wlr_output);
output->scene_output = wlr_scene_get_scene_output(output->server->scene, wlr_output);
assert(output->scene_output != NULL);
if (wlr_output_commit(wlr_output)) {
output_layout_add_auto(output);
}
update_output_manager_config(output->server);
}
@ -98,12 +120,10 @@ output_disable(struct cg_output *output)
return;
}
output->scene_output = NULL;
wlr_log(WLR_DEBUG, "Disabling output %s", wlr_output->name);
wlr_output_enable(wlr_output, false);
wlr_output_layout_remove(output->server->output_layout, wlr_output);
wlr_output_commit(wlr_output);
output_layout_remove(output);
}
static bool
@ -136,9 +156,9 @@ output_apply_config(struct cg_output *output, struct wlr_output_configuration_he
}
if (head->state.enabled) {
wlr_output_layout_add(output->server->output_layout, head->state.output, head->state.x, head->state.y);
output_layout_add(output, head->state.x, head->state.y);
} else {
wlr_output_layout_remove(output->server->output_layout, output->wlr_output);
output_layout_remove(output);
}
return true;
@ -149,7 +169,7 @@ handle_output_frame(struct wl_listener *listener, void *data)
{
struct cg_output *output = wl_container_of(listener, output, frame);
if (!output->wlr_output->enabled) {
if (!output->wlr_output->enabled || !output->scene_output) {
return;
}
@ -170,15 +190,6 @@ handle_output_commit(struct wl_listener *listener, void *data)
* - output layout change will also be called if needed to position the views
* - always update output manager configuration even if the output is now disabled */
if (event->committed & WLR_OUTPUT_STATE_ENABLED) {
if (output->wlr_output->enabled) {
output->scene_output = wlr_scene_get_scene_output(output->server->scene, output->wlr_output);
assert(output->scene_output != NULL);
} else {
output->scene_output = NULL;
}
}
if (event->committed & OUTPUT_CONFIG_UPDATED) {
update_output_manager_config(output->server);
}
@ -234,7 +245,7 @@ output_destroy(struct cg_output *output)
wl_list_remove(&output->frame.link);
wl_list_remove(&output->link);
wlr_output_layout_remove(server->output_layout, output->wlr_output);
output_layout_remove(output);
free(output);