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drm/i915/vlv: disable rc6p and rc6pp residency reporting on BYT 

Byt doesn't have rc6p and rc6pp support and even more important the
the offsets of the residency registers there's something else. So Just
return a constant 0 to avoid upsetting userspace tools like powertop.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Explain a bit in the commit message what's going on.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2013-09-11 13:43:20 -07:00 committed by Daniel Vetter
parent a2b23fe04e
commit 5ffd494b8e
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/i915_sysfs.c
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@ -65,6 +65,8 @@ show_rc6p_ms(struct device *kdev, struct device_attribute *attr, char *buf)
{
struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev);
u32 rc6p_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6p);
if (IS_VALLEYVIEW(dminor->dev))
rc6p_residency = 0;
return snprintf(buf, PAGE_SIZE, "%u\n", rc6p_residency);
}
@ -73,6 +75,8 @@ show_rc6pp_ms(struct device *kdev, struct device_attribute *attr, char *buf)
{
struct drm_minor *dminor = container_of(kdev, struct drm_minor, kdev);
u32 rc6pp_residency = calc_residency(dminor->dev, GEN6_GT_GFX_RC6pp);
if (IS_VALLEYVIEW(dminor->dev))
rc6pp_residency = 0;
return snprintf(buf, PAGE_SIZE, "%u\n", rc6pp_residency);
}