diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2010-07-26 18:51:53 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-08-02 10:06:18 +1000 |
| commit | 812d046915f48236657f02c06d7dc47140e9ceda (patch) | |
| tree | 77a9c724a2316593fa22f7442d5c4a8d00c9af32 /drivers/gpu/drm/radeon/r600.c | |
| parent | 833ee5c4ab36937a99e63935d7f06bc2c1f9343b (diff) | |
drm/radeon/kms/r7xx: add workaround for hw issue with HDP flush
Use of HDP_*_COHERENCY_FLUSH_CNTL can cause a hang in certain
situations. Add workaround.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/r600.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/r600.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index e1e59e1b318..28e39bc6768 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -884,7 +884,17 @@ void r600_pcie_gart_tlb_flush(struct radeon_device *rdev) u32 tmp; /* flush hdp cache so updates hit vram */ - WREG32(R_005480_HDP_MEM_COHERENCY_FLUSH_CNTL, 0x1); + if ((rdev->family >= CHIP_RV770) && (rdev->family <= CHIP_RV740)) { + void __iomem *ptr = (void *)rdev->gart.table.vram.ptr; + u32 tmp; + + /* r7xx hw bug. write to HDP_DEBUG1 followed by fb read + * rather than write to HDP_REG_COHERENCY_FLUSH_CNTL + */ + WREG32(HDP_DEBUG1, 0); + tmp = readl((void __iomem *)ptr); + } else + WREG32(R_005480_HDP_MEM_COHERENCY_FLUSH_CNTL, 0x1); WREG32(VM_CONTEXT0_INVALIDATION_LOW_ADDR, rdev->mc.gtt_start >> 12); WREG32(VM_CONTEXT0_INVALIDATION_HIGH_ADDR, (rdev->mc.gtt_end - 1) >> 12); @@ -3527,5 +3537,15 @@ int r600_debugfs_mc_info_init(struct radeon_device *rdev) */ void r600_ioctl_wait_idle(struct radeon_device *rdev, struct radeon_bo *bo) { - WREG32(R_005480_HDP_MEM_COHERENCY_FLUSH_CNTL, 0x1); + /* r7xx hw bug. write to HDP_DEBUG1 followed by fb read + * rather than write to HDP_REG_COHERENCY_FLUSH_CNTL + */ + if ((rdev->family >= CHIP_RV770) && (rdev->family <= CHIP_RV740)) { + void __iomem *ptr = (void *)rdev->gart.table.vram.ptr; + u32 tmp; + + WREG32(HDP_DEBUG1, 0); + tmp = readl((void __iomem *)ptr); + } else + WREG32(R_005480_HDP_MEM_COHERENCY_FLUSH_CNTL, 0x1); } |