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Fix segfault in wlr_output_manager_v1_set_configuration

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Calling wlr_output_manager_v1_set_configuration with an enabled output
and a NULL mode is incorrect if the output doesn't support modes.

When DPMS'ing an output, wlr_output_enable(output, false) is called.
This de-allocates the CRTC and sets wlr_output.current_mode to NULL.

Because we mark DPMS'ed outputs as enabled, we also need to provide a
correct output mode. Add a field to sway_output to hold the current
mode.

Closes: https://github.com/swaywm/wlroots/issues/1867
This commit is contained in:
Simon Ser 2019-10-26 14:00:37 +02:00 committed by Drew DeVault
parent 58a40ce07b
commit ec14a00e8c
4 changed files with 5 additions and 0 deletions
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2
include/sway/output.h
View file

@ -32,6 +32,8 @@ struct sway_output {
int lx, ly; // layout coords
int width, height; // transformed buffer size
enum wl_output_subpixel detected_subpixel;
// last applied mode when the output is DPMS'ed
struct wlr_output_mode *current_mode;
bool enabled, configured;
list_t *workspaces;

1
sway/config/output.c
View file

@ -278,6 +278,7 @@ bool apply_output_config(struct output_config *oc, struct sway_output *output) {
sway_log(SWAY_ERROR, "Failed to modeset output %s", wlr_output->name);
return false;
}
output->current_mode = wlr_output->current_mode;
if (oc && oc->scale > 0) {
sway_log(SWAY_DEBUG, "Set %s scale to %f", oc->name, oc->scale);

1
sway/desktop/output.c
View file

@ -662,6 +662,7 @@ static void update_output_manager_config(struct sway_server *server) {
root->output_layout, output->wlr_output);
// We mark the output enabled even if it is switched off by DPMS
config_head->state.enabled = output->enabled;
config_head->state.mode = output->current_mode;
if (output_box) {
config_head->state.x = output_box->x;
config_head->state.y = output_box->y;

1
sway/tree/output.c
View file

@ -269,6 +269,7 @@ void output_disable(struct sway_output *output) {
output->enabled = false;
output->configured = false;
output->current_mode = NULL;
arrange_root();
}