From: Ville Syrjälä Date: Thu, 24 Sep 2015 20:29:20 +0000 (+0300) Subject: drm/i915: Use czclk_freq in vlv c0 residency calculations X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7bad74d57c81b08218cc564af3a78427e12bf3ac;p=linux-beck.git drm/i915: Use czclk_freq in vlv c0 residency calculations Replace the use of mem_freq/4 with czclk_freq in the vlv c0 residency calculations. Also deal with VLV_COUNT_RANGE_HIGH which affects all RCx residency counters. We have just enough bits to do this without intermediate divisions. Signed-off-by: Ville Syrjälä Reviewed-by: Imre Deak Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index ff85eae932bc..76bd40e13391 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -997,12 +997,16 @@ static bool vlv_c0_above(struct drm_i915_private *dev_priv, int threshold) { u64 time, c0; + unsigned int mul = 100; if (old->cz_clock == 0) return false; + if (I915_READ(VLV_COUNTER_CONTROL) & VLV_COUNT_RANGE_HIGH) + mul <<= 8; + time = now->cz_clock - old->cz_clock; - time *= threshold * dev_priv->mem_freq; + time *= threshold * dev_priv->czclk_freq; /* Workload can be split between render + media, e.g. SwapBuffers * being blitted in X after being rendered in mesa. To account for @@ -1010,7 +1014,7 @@ static bool vlv_c0_above(struct drm_i915_private *dev_priv, */ c0 = now->render_c0 - old->render_c0; c0 += now->media_c0 - old->media_c0; - c0 *= 100 * VLV_CZ_CLOCK_TO_MILLI_SEC * 4 / 1000; + c0 *= mul * VLV_CZ_CLOCK_TO_MILLI_SEC; return c0 >= time; }