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Subject[PATCH 3.12 45/78] drm/radeon: add a dpm quirk for all R7 370 parts
Date
From: Alex Deucher <alexander.deucher@amd.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

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: Jiri Slaby <jslaby@suse.cz>
---
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 34527c050062..393217886d98 100644
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -3008,6 +3008,10 @@ 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 */

--
2.8.1
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