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drm/radeon/dpm: disable sclk ss on rv6xx

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Enabling spread spectrum on the engine clock
leads to hangs on some asics.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=66963

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-08-01 14:35:02 -04:00
parent 2858c00d28
commit ce149a9406
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/radeon/rv6xx_dpm.c
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@ -1992,6 +1992,9 @@ int rv6xx_dpm_init(struct radeon_device *rdev)
pi->mclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss,
ASIC_INTERNAL_MEMORY_SS, 0);
/* Disable sclk ss, causes hangs on a lot of systems */
pi->sclk_ss = false;
if (pi->sclk_ss || pi->mclk_ss)
pi->dynamic_ss = true;
else