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drm/nouveau: Disable PROM access on init.

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On older cards (<nv17) scanout gets blocked when the ROM is being
accessed. PROM access usually comes out enabled from suspend, switch
it off.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-07-10 18:10:59 +02:00 committed by Ben Skeggs
parent 77144554de
commit 112d20ad5c
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/nouveau/nv04_mc.c
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@ -11,6 +11,10 @@ nv04_mc_init(struct drm_device *dev)
*/ */
nv_wr32(dev, NV03_PMC_ENABLE, 0xFFFFFFFF); nv_wr32(dev, NV03_PMC_ENABLE, 0xFFFFFFFF);
/* Disable PROM access. */
nv_wr32(dev, NV_PBUS_PCI_NV_20, NV_PBUS_PCI_NV_20_ROM_SHADOW_ENABLED);
return 0; return 0;
} }