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drm/i915: Fix ILK GPU reset domain bits 

We're using the reset domains bits for g4x on ilk. But on ilk those bits
actually shifted by one bit. Fix it up so that we use the correct bits.

We were actually always writing 0x2 to the reset domain bits, which
is a reserved value. In practice it looks like the hardware ignores that
value since nothing happens if I write that value when there's a 3D
workload running. Writing the _correct_ render domain value actually
makes the GPU stop.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-05-19 19:23:24 +03:00 committed by Daniel Vetter
parent f67deb723d
commit b3a3f03d7b
2 changed files with 13 additions and 7 deletions
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8
drivers/gpu/drm/i915/i915_reg.h
View File

@ -79,13 +79,19 @@
/* Graphics reset regs */
#define I965_GDRST 0xc0 /* PCI config register */
#define ILK_GDSR 0x2ca4 /* MCHBAR offset */
#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 ILK_GDSR 0x2ca4 /* MCHBAR offset */
#define ILK_GRDOM_FULL (0<<1)
#define ILK_GRDOM_RENDER (1<<1)
#define ILK_GRDOM_MEDIA (3<<1)
#define ILK_GRDOM_MASK (3<<1)
#define ILK_GRDOM_RESET_ENABLE (1<<0)
#define GEN6_MBCUNIT_SNPCR 0x900c /* for LLC config */
#define GEN6_MBC_SNPCR_SHIFT 21
#define GEN6_MBC_SNPCR_MASK (3<<21)

12
drivers/gpu/drm/i915/intel_uncore.c
View File

@ -995,20 +995,20 @@ static int ironlake_do_reset(struct drm_device *dev)
int ret;
gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
gdrst &= ~GRDOM_MASK;
gdrst &= ~ILK_GRDOM_MASK;
I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
gdrst | GRDOM_RENDER | GRDOM_RESET_ENABLE);
gdrst | ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE);
ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) &
GRDOM_RESET_ENABLE) == 0, 500);
ILK_GRDOM_RESET_ENABLE) == 0, 500);
if (ret)
return ret;
gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
gdrst &= ~GRDOM_MASK;
gdrst &= ~ILK_GRDOM_MASK;
I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
gdrst | GRDOM_MEDIA | GRDOM_RESET_ENABLE);
gdrst | ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE);
return wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) &
GRDOM_RESET_ENABLE) == 0, 500);
ILK_GRDOM_RESET_ENABLE) == 0, 500);
}
static int gen6_do_reset(struct drm_device *dev)