[PATCH 3.14 068/228] drm/radeon: disable mclk dpm on R7 260X
From: Greg Kroah-Hartman
Date: Wed Jun 04 2014 - 20:38:14 EST
3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alex Deucher <alexdeucher@xxxxxxxxx>
commit 57700ad1f2f21d5d7ab7ee0e58d11b5954852434 upstream.
Setting higher mclks seems to cause stability issues
on some R7 260X boards. Disable it for now for stability
until we find a proper fix.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=75992
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/ci_dpm.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/radeon/ci_dpm.c
+++ b/drivers/gpu/drm/radeon/ci_dpm.c
@@ -5106,6 +5106,10 @@ int ci_dpm_init(struct radeon_device *rd
pi->mclk_dpm_key_disabled = 0;
pi->pcie_dpm_key_disabled = 0;
+ /* mclk dpm is unstable on some R7 260X cards */
+ if (rdev->pdev->device == 0x6658)
+ pi->mclk_dpm_key_disabled = 1;
+
pi->caps_sclk_ds = true;
pi->mclk_strobe_mode_threshold = 40000;
--
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