Setting MC_MISC_CNTL.GART_INDEX_REG_EN causes hangs on some boards on resume. The systems seem to work fine without touching this bit so leave it as is.
Reported-by: Ondrej Zary linux@rainbow-software.org Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/rs400.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/rs400.c b/drivers/gpu/drm/radeon/rs400.c index 233a9b9..d48fdacd 100644 --- a/drivers/gpu/drm/radeon/rs400.c +++ b/drivers/gpu/drm/radeon/rs400.c @@ -177,7 +177,8 @@ int rs400_gart_enable(struct radeon_device *rdev) WREG32_MC(RS480_MC_MISC_CNTL, (RS480_GART_INDEX_REG_EN | RS690_BLOCK_GFX_D3_EN)); } else { - WREG32_MC(RS480_MC_MISC_CNTL, RS480_GART_INDEX_REG_EN); + /* XXX this causes hangs on a some boards on resume */ + /*WREG32_MC(RS480_MC_MISC_CNTL, RS480_GART_INDEX_REG_EN);*/ } /* Enable gart */ WREG32_MC(RS480_AGP_ADDRESS_SPACE_SIZE, (RS480_GART_EN | size_reg));