From c59ffbe17b2b6c9f68bf4f101e4d6b16b5254aa5 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 28 Mar 2016 10:21:20 -0400 Subject: [PATCH] drm/radeon: add a dpm quirk for all R7 370 parts commit 0e5585dc870af947fab2af96a88c2d8b4270247c upstream. Higher mclk values are not stable due to a bug somewhere. Limit them for now. Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/si_dpm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c index daa6af922deed..93abc111307f0 100644 --- a/drivers/gpu/drm/radeon/si_dpm.c +++ b/drivers/gpu/drm/radeon/si_dpm.c @@ -3007,6 +3007,10 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev, ps->performance_levels[i].sclk = max_sclk; } } + /* limit mclk on all R7 370 parts for stability */ + if (rdev->pdev->device == 0x6811 && + rdev->pdev->revision == 0x81) + max_mclk = 120000; /* XXX validate the min clocks required for display */ -- 2.47.2