summaryrefslogtreecommitdiffstats
path: root/drivers/gpu
diff options
context:
space:
mode:
authorImre Deak <imre.deak@intel.com>2016-06-28 12:37:31 +0200
committerJani Nikula <jani.nikula@intel.com>2016-06-29 10:17:50 +0200
commit11f6145791775ce41b8993fd29e19eb53ef0ff14 (patch)
tree49905c76f8d7898ef6ec421d55a29cf9a01f9037 /drivers/gpu
parentdrm/i915/bxt: Avoid early timeout during PLL enable (diff)
downloadlinux-11f6145791775ce41b8993fd29e19eb53ef0ff14.tar.xz
linux-11f6145791775ce41b8993fd29e19eb53ef0ff14.zip
drm/i915/lpt: Avoid early timeout during FDI PHY reset
Since wait_for_atomic doesn't re-check the wait-for condition after expiry of the timeout it can fail when called from non-atomic context even if the condition is set correctly before the expiry. Fix this by using the non-atomic wait_for instead. Fixes: 0351b93992aa ("drm/i915: Do not lie about atomic timeout granularity") CC: Chris Wilson <chris@chris-wilson.co.uk> CC: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> CC: drm-intel-fixes@lists.freedesktop.org Link: http://patchwork.freedesktop.org/patch/msgid/1467110253-16046-3-git-send-email-imre.deak@intel.com (cherry picked from commit cf3598c23cd09d5f063fa8c12fe9ddd5a352d3d5) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/intel_display.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 56a1637c864f..a164ea44f668 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8447,16 +8447,16 @@ static void lpt_reset_fdi_mphy(struct drm_i915_private *dev_priv)
tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
I915_WRITE(SOUTH_CHICKEN2, tmp);
- if (wait_for_atomic_us(I915_READ(SOUTH_CHICKEN2) &
- FDI_MPHY_IOSFSB_RESET_STATUS, 100))
+ if (wait_for_us(I915_READ(SOUTH_CHICKEN2) &
+ FDI_MPHY_IOSFSB_RESET_STATUS, 100))
DRM_ERROR("FDI mPHY reset assert timeout\n");
tmp = I915_READ(SOUTH_CHICKEN2);
tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
I915_WRITE(SOUTH_CHICKEN2, tmp);
- if (wait_for_atomic_us((I915_READ(SOUTH_CHICKEN2) &
- FDI_MPHY_IOSFSB_RESET_STATUS) == 0, 100))
+ if (wait_for_us((I915_READ(SOUTH_CHICKEN2) &
+ FDI_MPHY_IOSFSB_RESET_STATUS) == 0, 100))
DRM_ERROR("FDI mPHY reset de-assert timeout\n");
}