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Date: Mon, 17 Oct 2016 09:51:30 +0200
From: Jiri Slaby <jslaby@...e.cz>
To: stable@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Alex Deucher <alexander.deucher@....com>,
Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 43/84] drm/radeon/si/dpm: add workaround for for Jet parts
From: Alex Deucher <alexander.deucher@....com>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 670bb4fd21c966d0d2a59ad4a99bb4889f9a2987 upstream.
Add clock quirks for Jet parts.
Reviewed-by: Sonny Jiang <sonny.jiang@....com>
Tested-by: Sonny Jiang <sonny.jiang@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
drivers/gpu/drm/radeon/si_dpm.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index 393217886d98..db9c7d26ed16 100644
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -3012,6 +3012,12 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev,
if (rdev->pdev->device == 0x6811 &&
rdev->pdev->revision == 0x81)
max_mclk = 120000;
+ /* limit sclk/mclk on Jet parts for stability */
+ if (rdev->pdev->device == 0x6665 &&
+ rdev->pdev->revision == 0xc3) {
+ max_sclk = 75000;
+ max_mclk = 80000;
+ }
/* XXX validate the min clocks required for display */
--
2.10.1
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