There is an intermitent RAM corruption happening with DMC micro-controler when in DC6 transitioning to PC9/10. So the recoomendation is to use DC5 as the deeper DC state for now until this issue is being investigated at firmware level. This macros must be re-worked in order to allow us to use module parameters to allow max DC states. However let's do this simple approach first before products out there start facing this corruption. Also this is the easiest one to be backported by products. Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_runtime_pm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index ec010ee..7332cc0 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -49,8 +49,8 @@ * present for a given platform. */ -#define GEN9_ENABLE_DC5(dev) 0 -#define SKL_ENABLE_DC6(dev) IS_SKYLAKE(dev) +#define GEN9_ENABLE_DC5(dev) IS_SKYLAKE(dev) +#define SKL_ENABLE_DC6(dev) 0 #define for_each_power_well(i, power_well, domain_mask, power_domains) \ for (i = 0; \ -- 2.4.3 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
