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Diffstat (limited to 'drivers/gpu/drm/radeon/rv770.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/rv770.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c index b7fd8206492..1d6fb79de27 100644 --- a/drivers/gpu/drm/radeon/rv770.c +++ b/drivers/gpu/drm/radeon/rv770.c @@ -189,7 +189,10 @@ static void rv770_mc_program(struct radeon_device *rdev) WREG32((0x2c20 + j), 0x00000000); WREG32((0x2c24 + j), 0x00000000); } - WREG32(HDP_REG_COHERENCY_FLUSH_CNTL, 0); + /* r7xx hw bug. Read from HDP_DEBUG1 rather + * than writing to HDP_REG_COHERENCY_FLUSH_CNTL + */ + tmp = RREG32(HDP_DEBUG1); rv515_mc_stop(rdev, &save); if (r600_mc_wait_for_idle(rdev)) { |