@@ -1176,11 +1176,13 @@ int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
int err;
val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
- WARN_ON(!!(val & VLV_GFX_CLK_FORCE_ON_BIT) == force_on);
#define COND (I915_READ(VLV_GTLC_SURVIVABILITY_REG) & VLV_GFX_CLK_STATUS_BIT)
/* Wait for a previous force-off to settle */
- if (force_on) {
+ 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",
This is a note to let you know that I have just added a patch titled drm/i915/chv: Remove Wait for a previous gfx force-off to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt11. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 51d73171df477dc488e4db6388f56ccad5ad3702 Mon Sep 17 00:00:00 2001 From: Deepak S <deepak.s@linux.intel.com> Date: Sat, 28 Mar 2015 15:23:34 +0530 Subject: drm/i915/chv: Remove Wait for a previous gfx force-off MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit c9c52e24194a741f9fca96e7aa965f0fa36af504 upstream. On CHV, PUNIT team confirmed that 'VLV_GFX_CLK_STATUS_BIT' is not a sticky bit and it will always be set. So ignore Check for previous Gfx force off during suspend and allow the force clk as part S0ix Sequence Signed-off-by: Deepak S <deepak.s@linux.intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/gpu/drm/i915/i915_drv.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)