egl/surfaceless: add probe device helper function
This will help us initialize a software driver, if it's needed
or requested.
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
diff --git a/src/egl/drivers/dri2/platform_surfaceless.c b/src/egl/drivers/dri2/platform_surfaceless.c
index 3c00ff4..f6aa217 100644
--- a/src/egl/drivers/dri2/platform_surfaceless.c
+++ b/src/egl/drivers/dri2/platform_surfaceless.c
@@ -267,6 +267,44 @@
NULL,
};
+static bool
+surfaceless_probe_device(_EGLDisplay *dpy)
+{
+ struct dri2_egl_display *dri2_dpy = dpy->DriverData;
+ const int limit = 64;
+ const int base = 128;
+ int fd;
+ int i;
+
+ for (i = 0; i < limit; ++i) {
+ char *card_path;
+ if (asprintf(&card_path, DRM_RENDER_DEV_NAME, DRM_DIR_NAME, base + i) < 0)
+ continue;
+
+ fd = loader_open_device(card_path);
+ free(card_path);
+ if (fd < 0)
+ continue;
+
+ dri2_dpy->driver_name = loader_get_driver_for_fd(fd);
+ if (!dri2_dpy->driver_name) {
+ close(fd);
+ continue;
+ }
+
+ dri2_dpy->fd = fd;
+ if (dri2_load_driver_dri3(dpy))
+ return true;
+
+ close(fd);
+ dri2_dpy->fd = -1;
+ free(dri2_dpy->driver_name);
+ dri2_dpy->driver_name = NULL;
+ }
+
+ return false;
+}
+
EGLBoolean
dri2_initialize_surfaceless(_EGLDriver *drv, _EGLDisplay *disp)
{
@@ -282,34 +320,7 @@
dri2_dpy->fd = -1;
disp->DriverData = (void *) dri2_dpy;
-
- const int limit = 64;
- const int base = 128;
- for (int i = 0; i < limit; ++i) {
- char *card_path;
- if (asprintf(&card_path, DRM_RENDER_DEV_NAME, DRM_DIR_NAME, base + i) < 0)
- continue;
-
- dri2_dpy->fd = loader_open_device(card_path);
-
- free(card_path);
- if (dri2_dpy->fd < 0)
- continue;
-
- dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
- if (dri2_dpy->driver_name) {
- if (dri2_load_driver_dri3(disp)) {
- driver_loaded = 1;
- break;
- }
- free(dri2_dpy->driver_name);
- dri2_dpy->driver_name = NULL;
- }
- close(dri2_dpy->fd);
- dri2_dpy->fd = -1;
- }
-
- if (!driver_loaded) {
+ if (!surfaceless_probe_device(disp)) {
err = "DRI2: failed to load driver";
goto cleanup;
}