From: Tom St Denis <tom.stdenis@xxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit fb9a5b0c1c9893db2e0d18544fd49e19d784a87d upstream.
Limit clocks on a specific HD86xx part to avoid
crashes (while awaiting an appropriate PP fix).
Signed-off-by: Tom St Denis <tom.stdenis@xxxxxxx>
Reviewed-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 c1281fc39040..c75e14fdcf54 100644
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -3018,6 +3018,12 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev,
max_sclk = 75000;
max_mclk = 80000;
}
+ /* limit clocks on HD8600 series */
+ if (rdev->pdev->device == 0x6660 &&
+ rdev->pdev->revision == 0x83) {
+ max_sclk = 75000;
+ max_mclk = 80000;
+ }
/* XXX validate the min clocks required for display */
--
2.10.2
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