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drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register() 

By using the out-of-line intel_wait_for_register() not only do we can
efficiency from using the hybrid wait_for() contained within, but we
avoid code bloat from the numerous inlined loops, in total (all patches):

   text    data     bss     dec     hex filename
1078551    4557     416 1083524  108884 drivers/gpu/drm/i915/i915.ko
1070775    4557     416 1075748  106a24 drivers/gpu/drm/i915/i915.ko

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467297225-21379-57-git-send-email-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-06-30 15:33:40 +01:00
parent 564514fdde
commit 41e8a1e864
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/i915/intel_sideband.c
View File

@ -221,8 +221,11 @@ u32 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
value = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IORD;
I915_WRITE(SBI_CTL_STAT, value | SBI_BUSY);
if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
100)) {
if (intel_wait_for_register(dev_priv,
SBI_CTL_STAT,
SBI_BUSY | SBI_RESPONSE_FAIL,
0,
100)) {
DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
return 0;
}