drm/radeon: add a dpm quirk for all R7 370 parts

Higher mclk values are not stable due to a bug somewhere.
Limit them for now.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index a280a320183276d3eb5f88d1bc6e1fd4558ce38e..af4df81c4e0c79c721dca5dc610da235d53651f9 100644 (file)
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -3010,6 +3010,10 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev,
                }
                ++p;
        }
+       /* limit mclk on all R7 370 parts for stability */
+       if (rdev->pdev->device == 0x6811 &&
+           rdev->pdev->revision == 0x81)
+               max_mclk = 120000;
 
        if (rps->vce_active) {
                rps->evclk = rdev->pm.dpm.vce_states[rdev->pm.dpm.vce_level].evclk;