drm/i915/skl: Restrict the ring frequency table programming to SKL

Ring frequency table programming is not required on BXT. Added separate
checks to enable the programming only for SKL & skip for BXT.

v2: Removed the BXT check from gen6_update_ring_freq function

Issue: VIZ-5144
Signed-off-by: Akash Goel <akash.goel@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 135fb97..f2be1ce 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6219,7 +6219,8 @@ static void intel_gen6_powersave_work(struct work_struct *work)
        } else if (INTEL_INFO(dev)->gen >= 9) {
                gen9_enable_rc6(dev);
                gen9_enable_rps(dev);
-               __gen6_update_ring_freq(dev);
+               if (IS_SKYLAKE(dev))
+                       __gen6_update_ring_freq(dev);
        } else if (IS_BROADWELL(dev)) {
                gen8_enable_rps(dev);
                __gen6_update_ring_freq(dev);