diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2015-04-01 14:22:58 -0700 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2015-05-11 11:05:58 +1000 |
| commit | cc7297dcb440eb9d2e50a8c26dc7e7b37ef37e25 (patch) | |
| tree | 30bd87e18553b320c05f17760b106e017491d44d | |
| parent | e1dee1973c74a0408b108d88c57a15be8a2d6d84 (diff) | |
drm/i915/vlv: remove wait for previous GFX clk disable request
Looks like it was introduced in:
commit 650ad970a39f8b6164fe8613edc150f585315289
Author: Imre Deak <imre.deak@intel.com>
Date: Fri Apr 18 16:35:02 2014 +0300
drm/i915: vlv: factor out vlv_force_gfx_clock and check for pending force-of
but I'm not sure why. It has caused problems for us in the past (see
85250ddff7a6 "drm/i915/chv: Remove Wait for a previous gfx force-off"
and 8d4eee9cd7a1 "drm/i915: vlv: increase timeout when forcing on the
GFX clock") and doesn't seem to be required, so let's just drop it.
[airlied: I messed up a merge - readd this]
References: https://bugs.freedesktop.org/show_bug.cgi?id=89611
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Darren Hart <dvhart@linux.intel.com>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Cc: stable@vger.kernel.org # c9c52e24194a: drm/i915/chv: Remove Wait ...
Cc: stable@vger.kernel.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 6e9ab2fb1647..e70adfd3b2d1 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1240,21 +1240,7 @@ int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on) u32 val; int err; - val = I915_READ(VLV_GTLC_SURVIVABILITY_REG); - #define COND (I915_READ(VLV_GTLC_SURVIVABILITY_REG) & VLV_GFX_CLK_STATUS_BIT) - /* Wait for a previous force-off to settle */ - if (force_on && !IS_CHERRYVIEW(dev_priv->dev)) { - /* WARN_ON only for the Valleyview */ - WARN_ON(!!(val & VLV_GFX_CLK_FORCE_ON_BIT) == force_on); - - err = wait_for(!COND, 20); - if (err) { - DRM_ERROR("timeout waiting for GFX clock force-off (%08x)\n", - I915_READ(VLV_GTLC_SURVIVABILITY_REG)); - return err; - } - } val = I915_READ(VLV_GTLC_SURVIVABILITY_REG); val &= ~VLV_GFX_CLK_FORCE_ON_BIT; |