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Commit 17136d54 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Don't accidentally increase the frequency in handling DOWN rps 



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: default avatarChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170210150348.22146-2-chris@chris-wilson.co.uk


Reviewed-by: default avatarRadoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
parent db4c5e0b

drivers/gpu/drm/i915/i915_irq.c

+1 −1
Original line number Diff line number Diff line
@@ -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) {