From: Tom St Denis <tom.stdenis@amd.com>
Date: Thu, 13 Oct 2016 16:38:07 +0000 (-0400)
Subject: drm/radeon/si_dpm: Limit clocks on HD86xx part
X-Git-Tag: v3.12.68~89
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=396e52fe57f7ed0b66bee58a5e25e41ade342b03;p=thirdparty%2Fkernel%2Fstable.git

drm/radeon/si_dpm: Limit clocks on HD86xx part

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@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index c1281fc390402..c75e14fdcf54b 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 */