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drm/i915: fix ILK GPU reset for render 

Earlier code would leave both bits set, so any reset after the first
would only reset media.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Jesse Barnes 2013-03-28 13:57:19 -07:00 committed by Daniel Vetter
parent d42264b1fc
commit 8a5c2ae753
2 changed files with 3 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_drv.c
View File

@ -744,6 +744,7 @@ static int ironlake_do_reset(struct drm_device *dev)
int ret;
gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
gdrst &= ~GRDOM_MASK;
I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
gdrst | GRDOM_RENDER | GRDOM_RESET_ENABLE);
ret = wait_for(I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & 0x1, 500);
@ -752,6 +753,7 @@ static int ironlake_do_reset(struct drm_device *dev)
/* We can't reset render&media without also resetting display ... */
gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
gdrst &= ~GRDOM_MASK;
I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
gdrst | GRDOM_MEDIA | GRDOM_RESET_ENABLE);
return wait_for(I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & 0x1, 500);

1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -91,6 +91,7 @@
#define GRDOM_FULL (0<<2)
#define GRDOM_RENDER (1<<2)
#define GRDOM_MEDIA (3<<2)
#define GRDOM_MASK (3<<2)
#define GRDOM_RESET_ENABLE (1<<0)
#define GEN6_MBCUNIT_SNPCR 0x900c /* for LLC config */