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 <alexander.deucher@amd.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index ded6644b7958d5e7a50384b457513cbf9f642ed8..42b2baf0e6d731877804a92db3ac29c25bf0230e 100644 (file)
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -3017,6 +3017,10 @@ 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 */