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drm/i915: Don't accidentally increase the frequency in handling DOWN rps
author
Chris Wilson
<chris@chris-wilson.co.uk>
Fri, 10 Feb 2017 15:03:47 +0000
(15:03 +0000)
committer
Chris Wilson
<chris@chris-wilson.co.uk>
Tue, 14 Feb 2017 22:35:39 +0000
(22:35 +0000)
If we receive a DOWN_TIMEOUT rps interrupt, we respond by reducing the
GPU clocks significantly. Before we do, double check that the frequency
we pick is actually a decrease.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link:
http://patchwork.freedesktop.org/patch/msgid/20170210150348.22146-2-chris@chris-wilson.co.uk
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
drivers/gpu/drm/i915/i915_irq.c
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diff --git
a/drivers/gpu/drm/i915/i915_irq.c
b/drivers/gpu/drm/i915/i915_irq.c
index
27c1319
..
86cca37
100644
(file)
--- a/
drivers/gpu/drm/i915/i915_irq.c
+++ b/
drivers/gpu/drm/i915/i915_irq.c
@@
-1186,7
+1186,7
@@
static void gen6_pm_rps_work(struct work_struct *work)
} else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
if (dev_priv->rps.cur_freq > dev_priv->rps.efficient_freq)
new_delay = dev_priv->rps.efficient_freq;
- else
+ else
if (dev_priv->rps.cur_freq > dev_priv->rps.min_freq_softlimit)
new_delay = dev_priv->rps.min_freq_softlimit;
adj = 0;
} else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) {