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drm/nvd9-/disp: disable display underflow reporting at init

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Reported-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2013-10-25 09:59:14 +10:00
parent d29b992470
commit e8d95b22b4
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c
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@ -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;
}