Commit 065e7dcb authored by Chris Wilson's avatar Chris Wilson 😣

lib: Report if kms is enabled on the display

Some drivers may have disabled KMS or there may simply nothing attached
to the device. In either case KMS is unusable and we may prefer to skip.
Signed-off-by: Chris Wilson's avatarChris Wilson <>
Acked-by: Antonio Argenziano's avatarAntonio Argenziano <>
parent f1249a92
......@@ -1843,8 +1843,9 @@ static void igt_fill_display_format_mod(igt_display_t *display);
* Initialize @display and allocate the various resources required. Use
* #igt_display_fini to release the resources when they are no longer required.
* Returns: true if the display has outputs and pipes available, false otherwise
void igt_display_init(igt_display_t *display, int drm_fd)
bool igt_display_init(igt_display_t *display, int drm_fd)
drmModeRes *resources;
drmModePlaneRes *plane_resources;
......@@ -1857,7 +1858,8 @@ void igt_display_init(igt_display_t *display, int drm_fd)
display->drm_fd = drm_fd;
resources = drmModeGetResources(display->drm_fd);
if (!resources)
goto out;
* We cache the number of pipes, that number is a physical limit of the
......@@ -2004,7 +2006,15 @@ void igt_display_init(igt_display_t *display, int drm_fd)
/* Set reasonable default values for every object in the display. */
return display->n_pipes && display->n_outputs;
void igt_display_require(igt_display_t *display, int drm_fd)
igt_require(igt_display_init(display, drm_fd));
......@@ -378,7 +378,8 @@ struct igt_display {
int format_mod_count;
void igt_display_init(igt_display_t *display, int drm_fd);
bool igt_display_init(igt_display_t *display, int drm_fd);
void igt_display_require(igt_display_t *display, int drm_fd);
void igt_display_fini(igt_display_t *display);
void igt_display_reset(igt_display_t *display);
int igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
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