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drm/i915: Use POSTING_READ in lcpll code 

If we don't use the return value of a mmio read our coding style is to
use the POSTING_READ macro. This avoids cluttering the mmio traces.

While at it add the missing posting read in the lcpll enable function
that Paulo spotted.

v2: Drop the _NOTRACE changes, tracing such wait_for loops in the modeset
code might actually be rather useful!

Cc: Paulo Zanoni <przanoni@gmail.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2013-08-21 23:38:08 +02:00
parent e27e9708c4
commit 35d8f2eb25
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_display.c
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@ -6036,13 +6036,14 @@ void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
if (val & LCPLL_POWER_DOWN_ALLOW) {
val &= ~LCPLL_POWER_DOWN_ALLOW;
I915_WRITE(LCPLL_CTL, val);
POSTING_READ(LCPLL_CTL);
}
val = I915_READ(D_COMP);
val |= D_COMP_COMP_FORCE;
val &= ~D_COMP_COMP_DISABLE;
I915_WRITE(D_COMP, val);
I915_READ(D_COMP);
POSTING_READ(D_COMP);
val = I915_READ(LCPLL_CTL);
val &= ~LCPLL_PLL_DISABLE;