From de3b4d9361c8a527aa91f49f779e2e378019d0f6 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Wed, 29 Apr 2020 21:54:46 +0100 Subject: [PATCH] drm/i915/gt: Restore aggressive post-boost downclocking We reduced the clocks slowly after a boost event based on the observation that the smoothness of animations suffered. However, since reducing the evalution intervals, we should be able to respond to the rapidly fluctuating workload of a simple desktop animation and so restore the more aggressive downclocking. References: 2a8862d2f3da ("drm/i915: Reduce the RPS shock") Signed-off-by: Chris Wilson Reviewed-by: Andi Shyti Link: https://patchwork.freedesktop.org/patch/msgid/20200429205446.3259-6-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/gt/intel_rps.c | 20 ++++---------------- 1 file changed, 4 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c index 1716d6d2c76f..c682355ec79e 100644 --- a/drivers/gpu/drm/i915/gt/intel_rps.c +++ b/drivers/gpu/drm/i915/gt/intel_rps.c @@ -1680,30 +1680,18 @@ static void rps_work(struct work_struct *work) adj = 0; } - rps->last_adj = adj; - /* - * Limit deboosting and boosting to keep ourselves at the extremes - * when in the respective power modes (i.e. slowly decrease frequencies - * while in the HIGH_POWER zone and slowly increase frequencies while - * in the LOW_POWER zone). On idle, we will hit the timeout and drop - * to the next level quickly, and conversely if busy we expect to - * hit a waitboost and rapidly switch into max power. - */ - if ((adj < 0 && rps->power.mode == HIGH_POWER) || - (adj > 0 && rps->power.mode == LOW_POWER)) - rps->last_adj = 0; - - /* sysfs frequency interfaces may have snuck in while servicing the - * interrupt + * sysfs frequency limits may have snuck in while + * servicing the interrupt */ new_freq += adj; new_freq = clamp_t(int, new_freq, min, max); if (intel_rps_set(rps, new_freq)) { drm_dbg(&i915->drm, "Failed to set new GPU frequency\n"); - rps->last_adj = 0; + adj = 0; } + rps->last_adj = adj; mutex_unlock(&rps->lock); -- 2.39.5