[PATCH 3.12 43/84] drm/radeon/si/dpm: add workaround for for Jet parts

From: Jiri Slaby
Date: Mon Oct 17 2016 - 04:10:23 EST


From: Alex Deucher <alexander.deucher@xxxxxxx>

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@xxxxxxx>
Tested-by: Sonny Jiang <sonny.jiang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
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