drm/radeon/dpm: disable sclk ss on rv6xx

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>
mariux64 · Aug 7, 2013 · ce149a9 · ce149a9
1 parent 2858c00
commit ce149a9
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/gpu/drm/radeon/rv6xx_dpm.c b/drivers/gpu/drm/radeon/rv6xx_dpm.c
@@ -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