linux-kernel - Re: [PATCH 20/80] drivers: drm: Remove redundant pm_runtime_mark_last

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Message-ID: <bf64da66-5475-4289-b3ee-a6247b168ff1@arm.com>
Date: Fri, 4 Jul 2025 10:18:19 +0100
From: Steven Price <steven.price@....com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>,
 Andrzej Hajda <andrzej.hajda@...el.com>,
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>,
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 Douglas Anderson <dianders@...omium.org>,
 Lucas Stach <l.stach@...gutronix.de>,
 Russell King <linux+etnaviv@...linux.org.uk>,
 Christian Gmeiner <christian.gmeiner@...il.com>,
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 Kyungmin Park <kyungmin.park@...sung.com>,
 Krzysztof Kozlowski <krzk@...nel.org>, Alim Akhtar
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 Chen-Yu Tsai <wenst@...omium.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 etnaviv@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org,
 linux-samsung-soc@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
 imx@...ts.linux.dev, lima@...ts.freedesktop.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH 20/80] drivers: drm: Remove redundant
 pm_runtime_mark_last_busy() calls

On 04/07/2025 08:54, Sakari Ailus wrote:
> pm_runtime_put_autosuspend(), pm_runtime_put_sync_autosuspend(),
> pm_runtime_autosuspend() and pm_request_autosuspend() now include a call
> to pm_runtime_mark_last_busy(). Remove the now-reduntant explicit call to
> pm_runtime_mark_last_busy().
> 
> Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> ---
> The cover letter of the set can be found here
> <URL:https://lore.kernel.org/linux-pm/20250704075225.3212486-1-sakari.ailus@linux.intel.com>.
> 
> In brief, this patch depends on PM runtime patches adding marking the last
> busy timestamp in autosuspend related functions. The patches are here, on
> rc2:
> 
>         git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \
>                 pm-runtime-6.17-rc1
> 
>  drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 2 --
>  drivers/gpu/drm/bridge/analogix/anx7625.c          | 2 --
>  drivers/gpu/drm/bridge/parade-ps8640.c             | 2 --
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c              | 1 -
>  drivers/gpu/drm/etnaviv/etnaviv_gpu.c              | 4 ----
>  drivers/gpu/drm/exynos/exynos_drm_fimc.c           | 2 --
>  drivers/gpu/drm/exynos/exynos_drm_g2d.c            | 2 --
>  drivers/gpu/drm/exynos/exynos_drm_gsc.c            | 2 --
>  drivers/gpu/drm/exynos/exynos_drm_rotator.c        | 1 -
>  drivers/gpu/drm/exynos/exynos_drm_scaler.c         | 1 -
>  drivers/gpu/drm/i915/intel_runtime_pm.c            | 2 --
>  drivers/gpu/drm/imx/dcss/dcss-crtc.c               | 1 -
>  drivers/gpu/drm/lima/lima_sched.c                  | 1 -
>  drivers/gpu/drm/panel/panel-edp.c                  | 3 ---
>  drivers/gpu/drm/panel/panel-samsung-atna33xc20.c   | 2 --
>  drivers/gpu/drm/panel/panel-simple.c               | 2 --
>  drivers/gpu/drm/panthor/panthor_sched.c            | 2 --

Panthor changes are:

Reviewed-by: Steven Price <steven.price@....com>

Thanks,
Steve

>  drivers/gpu/drm/tegra/submit.c                     | 1 -
>  drivers/gpu/drm/tidss/tidss_drv.c                  | 2 --
>  drivers/gpu/drm/vc4/vc4_v3d.c                      | 1 -
>  20 files changed, 36 deletions(-)
> 
[...]

> diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c
> index a2248f692a03..f635f26a23f4 100644
> --- a/drivers/gpu/drm/panthor/panthor_sched.c
> +++ b/drivers/gpu/drm/panthor/panthor_sched.c
> @@ -2446,7 +2446,6 @@ static void tick_work(struct work_struct *work)
>  
>  out_unlock:
>  	mutex_unlock(&sched->lock);
> -	pm_runtime_mark_last_busy(ptdev->base.dev);
>  	pm_runtime_put_autosuspend(ptdev->base.dev);
>  
>  out_dev_exit:
> @@ -3203,7 +3202,6 @@ queue_run_job(struct drm_sched_job *sched_job)
>  
>  out_unlock:
>  	mutex_unlock(&sched->lock);
> -	pm_runtime_mark_last_busy(ptdev->base.dev);
>  	pm_runtime_put_autosuspend(ptdev->base.dev);
>  
>  	return done_fence;