modesetting: Don't try to use modifiers when allocating the root pixmap

We want the root pixmap to use conservative tiling modifiers in
order to make sure modeset/etc can never fail due to hardware
watermark restictions/etc.

Currenlty this is all dead code anyway because we aren't actually
parsing the IN_FORMATS blob (missing universal plane client cap).
But we want to start parsing that, so let's first make sure we
don't get any behavioural changes from doing so.

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

Author: vsyrjala

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

@@ -1118,10 +1118,6 @@ drmmode_create_bo(drmmode_ptr drmmode, drmmode_bo *bo,
 
 #ifdef GLAMOR_HAS_GBM
     if (drmmode->glamor) {
-#ifdef GBM_BO_WITH_MODIFIERS
-        uint32_t num_modifiers;
-        uint64_t *modifiers = NULL;
-#endif
         uint32_t format;
 
         switch (drmmode->scrn->depth) {
@@ -1139,22 +1135,6 @@ drmmode_create_bo(drmmode_ptr drmmode, drmmode_bo *bo,
             break;
         }
 
-#ifdef GBM_BO_WITH_MODIFIERS
-        num_modifiers = get_modifiers_set(drmmode->scrn, format, &modifiers,
-                                          FALSE, TRUE);
-        if (num_modifiers > 0 &&
-            !(num_modifiers == 1 && modifiers[0] == DRM_FORMAT_MOD_INVALID)) {
-            bo->gbm = gbm_bo_create_with_modifiers(drmmode->gbm, width, height,
-                                                   format, modifiers,
-                                                   num_modifiers);
-            free(modifiers);
-            if (bo->gbm) {
-                bo->used_modifiers = TRUE;
-                return TRUE;
-            }
-        }
-#endif
-
         bo->gbm = gbm_bo_create(drmmode->gbm, width, height, format,
                                 GBM_BO_USE_RENDERING | GBM_BO_USE_SCANOUT);
         bo->used_modifiers = FALSE;