drm/nv50/disp: fix gamma with page flipping overlay turned on

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index 74a3f687270124cdfb32ddd55ce78f9ae70a6157..08da478ba544e312ab72b4b23b1db23607a433e5 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -409,7 +409,7 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb,
        struct nouveau_channel *evo = dispc->sync;
        int ret;
 
-       ret = RING_SPACE(evo, 24);
+       ret = RING_SPACE(evo, chan ? 25 : 27);
        if (unlikely(ret))
                return ret;
 
@@ -458,8 +458,19 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb,
        /* queue the flip on the crtc's "display sync" channel */
        BEGIN_RING(evo, 0, 0x0100, 1);
        OUT_RING  (evo, 0xfffe0000);
-       BEGIN_RING(evo, 0, 0x0084, 5);
-       OUT_RING  (evo, chan ? 0x00000100 : 0x00000010);
+       if (chan) {
+               BEGIN_RING(evo, 0, 0x0084, 1);
+               OUT_RING  (evo, 0x00000100);
+       } else {
+               BEGIN_RING(evo, 0, 0x0084, 1);
+               OUT_RING  (evo, 0x00000010);
+               /* allows gamma somehow, PDISP will bitch at you if
+                * you don't wait for vblank before changing this..
+                */
+               BEGIN_RING(evo, 0, 0x00e0, 1);
+               OUT_RING  (evo, 0x40000000);
+       }
+       BEGIN_RING(evo, 0, 0x0088, 4);
        OUT_RING  (evo, dispc->sem.offset);
        OUT_RING  (evo, 0xf00d0000 | dispc->sem.value);
        OUT_RING  (evo, 0x74b1e000);