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drm/i915: fix drps disable so unload & re-load works

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At unload time, we need to disable DRPS, but we need to do it correctly
or the GPU will hang and we won't be able to load the module again.  So
set the SFCAVM bit so we can properly restore the DRPS config at unload.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Jesse Barnes 2010-02-04 14:17:47 -08:00 committed by Eric Anholt
parent 060e645ac0
commit 357b13c3e4
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -4699,7 +4699,7 @@ void ironlake_disable_drps(struct drm_device *dev)
fstart = (I915_READ(MEMMODECTL) & MEMMODE_FSTART_MASK) >>
MEMMODE_FSTART_SHIFT;
rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
(fstart << MEMCTL_FREQ_SHIFT);
(fstart << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
I915_WRITE(MEMSWCTL, rgvswctl);
msleep(1);
rgvswctl |= MEMCTL_CMD_STS;