From: Deepak S Date: Fri, 12 Aug 2016 13:16:41 +0000 (+0530) Subject: drm/i915/chv: Set min freq to RPn on CHV. X-Git-Tag: MMI-PSA29.97-13-9~5363^2~37^2~233 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=96676fe3a18e61ee2d67992da537d6b68f45df66;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git drm/i915/chv: Set min freq to RPn on CHV. With latest Punit FW, vgg input voltag drop falling to minimum is fixed. So reverting the WA patch & moving to turbo freq opreation range to [RPn -> RP0] This is not a 1:1 revert of the commit 5b7c91b78b1ce6663e0f1f037f6cb4d7c9537d44. You can refer to commit 5b5929cbe3f7 ("drm/i915/chv: remove pre-production hardware workarounds") as the reason for the discrepancy commit 5b7c91b78b1ce6663e0f1f037f6cb4d7c9537d44 Author: Deepak S Date: Sat May 9 18:15:46 2015 +0530 drm/i915/chv: Set min freq to efficient frequency on chv v2: Fix inconsistent return type. (Chris) v3: drop pre-production hw case (Ville) Acked-by: Chris Wilson Signed-off-by: Deepak S Link: http://patchwork.freedesktop.org/patch/msgid/1471007801-86075-1-git-send-email-deepak.s@linux.intel.com Reviewed-by: Ville Syrjälä Signed-off-by: Ville Syrjälä --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 3c13be8985f1..633cb0478b92 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5708,6 +5708,17 @@ static int cherryview_rps_guar_freq(struct drm_i915_private *dev_priv) return rp1; } +static u32 cherryview_rps_min_freq(struct drm_i915_private *dev_priv) +{ + u32 val, rpn; + + val = vlv_punit_read(dev_priv, FB_GFX_FMIN_AT_VMIN_FUSE); + rpn = ((val >> FB_GFX_FMIN_AT_VMIN_FUSE_SHIFT) & + FB_GFX_FREQ_FUSE_MASK); + + return rpn; +} + static int valleyview_rps_guar_freq(struct drm_i915_private *dev_priv) { u32 val, rp1; @@ -5944,8 +5955,7 @@ static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv) intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq), dev_priv->rps.rp1_freq); - /* PUnit validated range is only [RPe, RP0] */ - dev_priv->rps.min_freq = dev_priv->rps.efficient_freq; + dev_priv->rps.min_freq = cherryview_rps_min_freq(dev_priv); DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n", intel_gpu_freq(dev_priv, dev_priv->rps.min_freq), dev_priv->rps.min_freq);