From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
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 <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_irq.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 07c87e0..d78ef64 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -998,12 +998,16 @@ 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
@@ -1011,7 +1015,7 @@ 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;
}
--
2.4.6
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