pi->mclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss,
ASIC_INTERNAL_MEMORY_SS, 0);
+ /* disable ss, causes hangs on some cayman boards */
+ if (rdev->family == CHIP_CAYMAN) {
+ pi->sclk_ss = false;
+ pi->mclk_ss = false;
+ }
+
if (pi->sclk_ss || pi->mclk_ss)
pi->dynamic_ss = true;
else