drm/msm: return the average load over the polling period

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simple_ondemand interacts poorly with clamp_to_idle.  It only looks at
the load since the last get_dev_status call, while it should really look
at the load over polling_ms.  When clamp_to_idle true, it almost always
picks the lowest frequency on active because the gpu is idle between
msm_devfreq_idle/msm_devfreq_active.

This logic could potentially be moved into devfreq core.

Fixes: 7c0ffcd40b ("drm/msm/gpu: Respect PM QoS constraints")
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Cc: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20220416003314.59211-3-olvaffe@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>

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Chia-I Wu 2022-04-15 17:33:14 -07:00 • committed by Rob Clark

parent 15c411980b

commit 78f815c1cf

2 changed files with 62 additions and 1 deletions

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3

drivers/gpu/drm/msm/msm_gpu.h

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60

drivers/gpu/drm/msm/msm_gpu_devfreq.c

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