[PATCH 4.8 106/138] drm/radeon/si_dpm: Limit clocks on HD86xx part

[Greg Kroah-Hartman]

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

------------------

From: Tom St Denis <tom.stdenis@xxxxxxx>

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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/radeon/si_dpm.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -3021,6 +3021,12 @@ static void si_apply_state_adjust_rules(
 		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;
+	}
 
 	if (rps->vce_active) {
 		rps->evclk = rdev->pm.dpm.vce_states[rdev->pm.dpm.vce_level].evclk;