Merge tag 'drm-next-2021-08-31-1' of git://anongit.freedesktop.org/drm/drm

[linux-2.6-microblaze.git] / drivers / gpu / drm / nouveau / dispnv50 / disp.c

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index bb5d1ca..d7b9f7f 100644 (file)
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -2268,6 +2268,33 @@ nv50_disp_atomic_commit_tail(struct drm_atomic_state *state)
                interlock[NV50_DISP_INTERLOCK_CORE] = 0;
        }
 
+       /* Finish updating head(s)...
+        *
+        * NVD is rather picky about both where window assignments can change,
+        * *and* about certain core and window channel states matching.
+        *
+        * The EFI GOP driver on newer GPUs configures window channels with a
+        * different output format to what we do, and the core channel update
+        * in the assign_windows case above would result in a state mismatch.
+        *
+        * Delay some of the head update until after that point to workaround
+        * the issue.  This only affects the initial modeset.
+        *
+        * TODO: handle this better when adding flexible window mapping
+        */
+       for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
+               struct nv50_head_atom *asyh = nv50_head_atom(new_crtc_state);
+               struct nv50_head *head = nv50_head(crtc);
+
+               NV_ATOMIC(drm, "%s: set %04x (clr %04x)\n", crtc->name,
+                         asyh->set.mask, asyh->clr.mask);
+
+               if (asyh->set.mask) {
+                       nv50_head_flush_set_wndw(head, asyh);
+                       interlock[NV50_DISP_INTERLOCK_CORE] = 1;
+               }
+       }
+
        /* Update plane(s). */
        for_each_new_plane_in_state(state, plane, new_plane_state, i) {
                struct nv50_wndw_atom *asyw = nv50_wndw_atom(new_plane_state);