diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2011-03-17 07:20:20 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2011-03-23 06:40:52 +0000 |
| commit | 762237bb714b0cd93ce2405ccc891fadb405c26e (patch) | |
| tree | 48f27bb52c136d30eca119c0a2b6613a204a51f6 /drivers/gpu | |
| parent | 19b01b5fbf0b78930b3b06ee6080539c17b5d1fd (diff) | |
drm/i915: Remove surplus POSTING_READs before wait_for_vblank
... as wait_for_vblank (and friends) will do a flush of the MMIO writes
anyway.
References: https://bugs.freedesktop.org/show_bug.cgi?id=34601
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3106c0dc8389..3bc6ab56cf8b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1518,7 +1518,6 @@ static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe, val = I915_READ(reg); val |= PIPECONF_ENABLE; I915_WRITE(reg, val); - POSTING_READ(reg); intel_wait_for_vblank(dev_priv->dev, pipe); } @@ -1554,7 +1553,6 @@ static void intel_disable_pipe(struct drm_i915_private *dev_priv, val = I915_READ(reg); val &= ~PIPECONF_ENABLE; I915_WRITE(reg, val); - POSTING_READ(reg); intel_wait_for_pipe_off(dev_priv->dev, pipe); } @@ -1579,7 +1577,6 @@ static void intel_enable_plane(struct drm_i915_private *dev_priv, val = I915_READ(reg); val |= DISPLAY_PLANE_ENABLE; I915_WRITE(reg, val); - POSTING_READ(reg); intel_wait_for_vblank(dev_priv->dev, pipe); } @@ -1612,7 +1609,6 @@ static void intel_disable_plane(struct drm_i915_private *dev_priv, val = I915_READ(reg); val &= ~DISPLAY_PLANE_ENABLE; I915_WRITE(reg, val); - POSTING_READ(reg); intel_flush_display_plane(dev_priv, plane); intel_wait_for_vblank(dev_priv->dev, pipe); } @@ -1769,7 +1765,6 @@ static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval) return; I915_WRITE(DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN); - POSTING_READ(DPFC_CONTROL); intel_wait_for_vblank(dev, intel_crtc->pipe); } @@ -1861,7 +1856,6 @@ static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval) return; I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN); - POSTING_READ(ILK_DPFC_CONTROL); intel_wait_for_vblank(dev, intel_crtc->pipe); } @@ -5777,7 +5771,6 @@ static void intel_increase_pllclock(struct drm_crtc *crtc) dpll &= ~DISPLAY_RATE_SELECT_FPA1; I915_WRITE(dpll_reg, dpll); - POSTING_READ(dpll_reg); intel_wait_for_vblank(dev, pipe); dpll = I915_READ(dpll_reg); @@ -5821,7 +5814,6 @@ static void intel_decrease_pllclock(struct drm_crtc *crtc) dpll |= DISPLAY_RATE_SELECT_FPA1; I915_WRITE(dpll_reg, dpll); - dpll = I915_READ(dpll_reg); intel_wait_for_vblank(dev, pipe); dpll = I915_READ(dpll_reg); if (!(dpll & DISPLAY_RATE_SELECT_FPA1)) |