linux-kernel - [PATCH v2 1/6] drm/msm: Increase gpu boost interval

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Date:   Wed, 24 Nov 2021 02:47:50 +0530
From:   Akhil P Oommen <akhilpo@...eaurora.org>
To:     freedreno <freedreno@...ts.freedesktop.org>,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        Rob Clark <robdclark@...il.com>
Cc:     Douglas Anderson <dianders@...omium.org>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Matthias Kaehlcke <mka@...omium.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>, Sean Paul <sean@...rly.run>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/6] drm/msm: Increase gpu boost interval

Currently, we boost gpu freq after 25ms of inactivity. This regresses
some of the 30 fps usecases where the workload on gpu (at 33ms internval)
is very small which it can finish at the lowest OPP before the deadline.
Lets increase this inactivity threshold to 50ms (same as the current
devfreq interval) to fix this.

Signed-off-by: Akhil P Oommen <akhilpo@...eaurora.org>
---

Changes in v2:
- Added patch (5) & (6) to this stack

 drivers/gpu/drm/msm/msm_gpu_devfreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_gpu_devfreq.c b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
index 84e98c0..5028f92 100644
--- a/drivers/gpu/drm/msm/msm_gpu_devfreq.c
+++ b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
@@ -167,7 +167,7 @@ void msm_devfreq_active(struct msm_gpu *gpu)
 	 * interval, then we won't meet the threshold of busyness for
 	 * the governor to ramp up the freq.. so give some boost
 	 */
-	if (idle_time > msm_devfreq_profile.polling_ms/2) {
+	if (idle_time > msm_devfreq_profile.polling_ms) {
 		target_freq *= 2;
 	}
 
-- 
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