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drm/i915: Drop stray clearing of rps->last_adj

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We used to reset last_adj to 0 on crossing a power domain boundary, to
slow down our rate of change. However, commit 60548c554b ("drm/i915:
Interactive RPS mode") accidentally caused it to be reset on every
frequency update, nerfing the fast response granted by the slow start
algorithm.

Fixes: 60548c554b ("drm/i915: Interactive RPS mode")
Testcase: igt/pm_rps/mix-max-config-loaded
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180802100631.31305-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-08-02 11:06:28 +01:00
parent d0f5cc5db1
commit 0d55babc83
1 changed files with 0 additions and 1 deletions
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drivers/gpu/drm/i915/intel_pm.c
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@ -6371,7 +6371,6 @@ static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
new_power = HIGH_POWER;
rps_set_power(dev_priv, new_power);
mutex_unlock(&rps->power.mutex);
rps->last_adj = 0;
}
void intel_rps_mark_interactive(struct drm_i915_private *i915, bool interactive)