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platform_kernel-5.15
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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/1467297225-21379-3-git-send-email-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-06-30 15:32:46 +01:00
parent 3f5582dd84
commit c6ddc5f3d0
1 changed files with 5 additions and 4 deletions
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9
drivers/gpu/drm/i915/i915_drv.c
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@ -2535,8 +2535,6 @@ int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
u32 val;
int err;
#define COND (I915_READ(VLV_GTLC_SURVIVABILITY_REG) & VLV_GFX_CLK_STATUS_BIT)
val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
if (force_on)
@ -2546,13 +2544,16 @@ int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
if (!force_on)
return 0;
err = wait_for(COND, 20);
err = intel_wait_for_register(dev_priv,
VLV_GTLC_SURVIVABILITY_REG,
VLV_GFX_CLK_STATUS_BIT,
VLV_GFX_CLK_STATUS_BIT,
20);
if (err)
DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
I915_READ(VLV_GTLC_SURVIVABILITY_REG));
return err;
#undef COND
}
static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)