diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2013-10-25 09:59:14 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2013-11-08 16:04:21 +1000 |
| commit | 6f02cf813c927d4b50f0da92c5af192a54d09748 (patch) | |
| tree | 2f13635b51e46f9d9c9fdf3369315af460102029 | |
| parent | df455db488c6e37d21f4e2c592b98da7e9396044 (diff) | |
drm/nvd9-/disp: disable display underflow reporting at init
Reported-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c b/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c index 52dd7a1db729..378a015091d2 100644 --- a/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c +++ b/drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c @@ -541,6 +541,15 @@ nvd0_disp_base_init(struct nouveau_object *object) nv_wr32(priv, 0x6100a0, 0x00000000); nv_wr32(priv, 0x6100b0, 0x00000307); + /* disable underflow reporting, preventing an intermittent issue + * on some nve4 boards where the production vbios left this + * setting enabled by default. + * + * ftp://download.nvidia.com/open-gpu-doc/gk104-disable-underflow-reporting/1/gk104-disable-underflow-reporting.txt + */ + for (i = 0; i < priv->head.nr; i++) + nv_mask(priv, 0x616308 + (i * 0x800), 0x00000111, 0x00000010); + return 0; } |