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drm/i915: Protect older gen against intel_gt_init_powersave()

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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 <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470132927-1821-1-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
This commit is contained in:
Chris Wilson
2016-08-02 11:15:27 +01:00
parent 238010ed6c
commit 2a13ae7952
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_pm.c
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@@ -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 */