From: Ville Syrjälä Date: Thu, 7 Nov 2013 17:57:48 +0000 (+0200) Subject: drm/i915: Kill vlv_update_rps_cur_delay() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4c7915616a7a09be0c1e5b76c26381df15fe671b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Kill vlv_update_rps_cur_delay() Polling to make sure the current GPU frequency matches the last requested frequency should not be necessay, and if there's some throttling involved, the two might not match anyway. Since we're still seeing this trigger occasionally, and it just introduces a rather pointless 10 ms delay, it seems like better to kill it off. Signed-off-by: Ville Syrjälä Reviewed-by: Jesse Barnes Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index e37860377285..542b4448ccb7 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3584,31 +3584,6 @@ void gen6_rps_boost(struct drm_i915_private *dev_priv) mutex_unlock(&dev_priv->rps.hw_lock); } -/* - * Wait until the previous freq change has completed, - * or the timeout elapsed, and then update our notion - * of the current GPU frequency. - */ -static void vlv_update_rps_cur_delay(struct drm_i915_private *dev_priv) -{ - u32 pval; - - WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); - - if (wait_for(((pval = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS)) & GENFREQSTATUS) == 0, 10)) - DRM_DEBUG_DRIVER("timed out waiting for Punit\n"); - - pval >>= 8; - - if (pval != dev_priv->rps.cur_delay) - DRM_DEBUG_DRIVER("Punit overrode GPU freq: %d MHz (%u) requested, but got %d Mhz (%u)\n", - vlv_gpu_freq(dev_priv, dev_priv->rps.cur_delay), - dev_priv->rps.cur_delay, - vlv_gpu_freq(dev_priv, pval), pval); - - dev_priv->rps.cur_delay = pval; -} - void valleyview_set_rps(struct drm_device *dev, u8 val) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -3617,8 +3592,6 @@ void valleyview_set_rps(struct drm_device *dev, u8 val) WARN_ON(val > dev_priv->rps.max_delay); WARN_ON(val < dev_priv->rps.min_delay); - vlv_update_rps_cur_delay(dev_priv); - DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n", vlv_gpu_freq(dev_priv, dev_priv->rps.cur_delay), dev_priv->rps.cur_delay,