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drm/i915/bdw: Don't use forcewake needlessly 

Not all registers need forcewake even if they're not shadowed.
Add the missing check to gen8_writeX() to avoid needless forcewake
usage when writing eg. display registers.

v2: Use straight up <0x40000 check instead of NEEDS_FORCE_WAKE()

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2013-12-13 13:26:20 +02:00 committed by Daniel Vetter
parent 97058870e6
commit a3564d2b52
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_uncore.c
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@ -634,7 +634,7 @@ static bool is_gen8_shadowed(struct drm_i915_private *dev_priv, u32 reg)
#define __gen8_write(x) \
static void \
gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
bool __needs_put = !is_gen8_shadowed(dev_priv, reg); \
bool __needs_put = reg < 0x40000 && !is_gen8_shadowed(dev_priv, reg); \
REG_WRITE_HEADER; \
if (__needs_put) { \
dev_priv->uncore.funcs.force_wake_get(dev_priv, \