From: Chris Wilson Date: Tue, 2 Aug 2016 10:15:27 +0000 (+0100) Subject: drm/i915: Protect older gen against intel_gt_init_powersave() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2a13ae79524ed8bec32a623e2763c649fa3e0846;p=linux-beck.git drm/i915: Protect older gen against intel_gt_init_powersave() In the middle of intel_gt_init_powersave() we have an if-chain that ends with a universal else clause to read gen6+ registers. Older platforms like Pineview that end up here do not like those registers and may even OOPS whilst reading them! Fixes: 3ea9a80132 ("drm/i915: Perform static RPS frequency setup ...") Signed-off-by: Chris Wilson Cc: Ville Syrjälä Cc: Mika Kuoppala Cc: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/1470132927-1821-1-git-send-email-chris@chris-wilson.co.uk Reviewed-by: Ville Syrjälä --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index e50505c67ef9..b5513d3a2df8 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -6493,7 +6493,7 @@ void intel_init_gt_powersave(struct drm_i915_private *dev_priv) cherryview_init_gt_powersave(dev_priv); else if (IS_VALLEYVIEW(dev_priv)) valleyview_init_gt_powersave(dev_priv); - else + else if (INTEL_GEN(dev_priv) >= 6) gen6_init_rps_frequencies(dev_priv); /* Derive initial user preferences/limits from the hardware limits */