modesetting: get unaccelerated, non-shadowfb modesetting working with gbm buffers only

Signed-off-by: stefan11111 <[email protected]>

Author: stefan11111

hw/xfree86/drivers/video/modesetting/driver.c

@@ -1690,7 +1690,7 @@ modesetCreateScreenResources(ScreenPtr pScreen)
     if (!ms->drmmode.sw_cursor)
         drmmode_map_cursor_bos(pScrn, &ms->drmmode);
 
-    if (ms->drmmode.shadow_enable) {
+    if (!ms->drmmode.glamor) {
         pixels = drmmode_map_front_bo(&ms->drmmode);
         if (!pixels)
             return FALSE;

hw/xfree86/drivers/video/modesetting/drmmode_display.c

@@ -1343,7 +1343,9 @@ drmmode_create_front_bo(drmmode_ptr drmmode, drmmode_bo *bo,
                 return TRUE;
             }
         }
-    } else if (drmmode->shadow_enable && drmmode->gbm) {
+    } else
+#endif
+    if (!drmmode->glamor && drmmode->gbm) {
         /* We don't need glamor if modifiers aren't used */
         bo->gbm = gbm_bo_create(drmmode->gbm, width, height,
                                 /* libgbm expects this for dumb scanout buffers for some reason */
@@ -1355,7 +1357,6 @@ drmmode_create_front_bo(drmmode_ptr drmmode, drmmode_bo *bo,
             return TRUE;
         }
     }
-#endif
 
     if (drmmode->gbm) {
         /* We don't need glamor if modifiers aren't used */