From: Sylwester Nawrocki <snawrocki@kernel.org>
To: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linuxarm@huawei.com, mauro.chehab@huawei.com,
Ezequiel Garcia <ezequiel@collabora.com>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Krzysztof Kozlowski <krzk@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
linux-samsung-soc@vger.kernel.org,
Sylwester Nawrocki <s.nawrocki@samsung.com>
Subject: Re: [PATCH 58/78] media: exynos-gsc: use pm_runtime_resume_and_get()
Date: Wed, 28 Apr 2021 10:27:30 +0200 [thread overview]
Message-ID: <01a14e06-b7f2-7246-ad12-4a13a96622a0@kernel.org> (raw)
In-Reply-To: <20210428091707.3c99d124@coco.lan>
On 28.04.2021 09:17, Mauro Carvalho Chehab wrote:
> Em Wed, 28 Apr 2021 09:13:02 +0200
> Mauro Carvalho Chehab <mchehab+huawei@kernel.org> escreveu:
>
>> Em Tue, 27 Apr 2021 13:50:44 +0200
>> Sylwester Nawrocki <s.nawrocki@samsung.com> escreveu:
>>
>>> On 27.04.2021 11:42, Mauro Carvalho Chehab wrote:
>>> I think if the device is brought into suspended state (e.g. by
>>> disabling clocks as above) the pm_runtime_set_suspended() call
>>> should be there. IOW a following sequence:
>>>
>>> pm_runtime_disable(dev);
>>> if (!pm_runtime_status_suspended(dev))
>>> /* put device into suspended state (disable clocks,
>>> voltage regulators, assert GPIOs, etc. */
>>> pm_runtime_set_suspended(dev);
>>
>> Not sure if this would work, as the clock framework would try
>> to do things like calling clk_pm_runtime_put().
It's done in multiple drivers this way. clk_pm_runtime_put() operates
on different device - the clock supplier, not the consumer device.
We just need to disable runtime PM for GSC as the last step, to avoid
any possible v4l2 m2m device_run() call with runtime PM disabled.
>> Perhaps an alternative would be to just return an error if it
>> can't resume PM runtime, e. g.:
[...]
> Nah, forget about that. Despite the platform driver having a return code,
> support for it bogus:
Yes, we can't really stop remove() from driver level so as much complete
resource release is being done as possible.
Regards,
Sylwester
next prev parent reply other threads:[~2021-04-28 8:27 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-24 6:44 [PATCH 00/78] media: use pm_runtime_resume_and_get() instead of pm_runtime_get_sync() Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 01/78] media: atmel: properly get pm_runtime Mauro Carvalho Chehab
2021-04-24 9:36 ` kernel test robot
2021-04-24 6:44 ` [PATCH 02/78] media: marvel-ccic: fix some issues when getting pm_runtime Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 03/78] media: mdk-mdp: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 04/78] media: rcar_fdp1: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 05/78] media: mdk-mdp: " Mauro Carvalho Chehab
2021-04-24 18:23 ` Ezequiel Garcia
2021-04-24 6:44 ` [PATCH 06/78] media: renesas-ceu: " Mauro Carvalho Chehab
2021-04-24 8:11 ` Jacopo Mondi
2021-04-24 6:44 ` [PATCH 07/78] media: s5p: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 08/78] media: am437x:: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 09/78] media: sh_vou: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 10/78] media: sti/hva: use pm_runtime_resume_and_get() Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 11/78] staging: media: rkvdec: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-04-24 23:20 ` Ezequiel Garcia
2021-04-24 6:44 ` [PATCH 12/78] staging: media: atomisp_fops: use pm_runtime_resume_and_get() Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 13/78] staging: media: hantro_drv: " Mauro Carvalho Chehab
2021-04-24 23:23 ` Ezequiel Garcia
2021-04-26 12:33 ` Mauro Carvalho Chehab
2021-04-26 12:42 ` Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 14/78] staging: media: imx7-mipi-csis: " Mauro Carvalho Chehab
2021-04-26 10:11 ` Rui Miguel Silva
2021-04-24 6:44 ` [PATCH 15/78] staging: media: ipu3: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 16/78] staging: media: cedrus_video: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 17/78] staging: media: vde: " Mauro Carvalho Chehab
2021-04-24 7:35 ` Dmitry Osipenko
2021-04-27 9:22 ` Mauro Carvalho Chehab
2021-04-27 12:34 ` Johan Hovold
2021-04-24 6:44 ` [PATCH 18/78] staging: media: csi: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 19/78] staging: media: vi: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 20/78] media: mtk-vcodec: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 21/78] media: s5p-jpeg: " Mauro Carvalho Chehab
2021-04-27 9:14 ` Sylwester Nawrocki
2021-04-24 6:44 ` [PATCH 22/78] media: delta-v4l2: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 23/78] media: sun8i_rotate: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 24/78] media: i2c: ak7375: use pm_runtime_resume_and_get() Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 25/78] media: i2c: ccs-core: " Mauro Carvalho Chehab
2021-04-25 18:55 ` Sakari Ailus
2021-04-26 14:01 ` Mauro Carvalho Chehab
2021-04-26 14:09 ` Sakari Ailus
2021-04-26 14:16 ` Mauro Carvalho Chehab
2021-04-26 14:29 ` Sakari Ailus
2021-04-26 17:32 ` Mauro Carvalho Chehab
2021-04-27 7:02 ` Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 26/78] media: i2c: dw9714: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 27/78] media: i2c: dw9768: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 28/78] media: i2c: dw9807-vcm: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 29/78] media: i2c: hi556: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 30/78] media: i2c: imx214: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 31/78] media: i2c: imx219: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 32/78] media: i2c: imx258: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 33/78] media: i2c: imx274: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 34/78] media: i2c: imx290: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 35/78] media: i2c: imx319: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 36/78] media: i2c: imx334: " Mauro Carvalho Chehab
2021-04-26 9:06 ` Alessandrelli, Daniele
2021-04-24 6:44 ` [PATCH 37/78] media: i2c: imx355: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 38/78] media: i2c: mt9m001: " Mauro Carvalho Chehab
2021-04-24 8:24 ` Jacopo Mondi
2021-04-24 10:00 ` Johan Hovold
2021-04-26 14:38 ` Mauro Carvalho Chehab
2021-04-27 12:23 ` Johan Hovold
2021-04-28 8:31 ` Mauro Carvalho Chehab
2021-04-28 10:05 ` Johan Hovold
2021-04-28 11:28 ` Mauro Carvalho Chehab
2021-04-28 11:56 ` Johan Hovold
2021-04-24 6:44 ` [PATCH 39/78] media: i2c: ov02a10: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 40/78] media: i2c: ov13858: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 41/78] media: i2c: ov2659: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 42/78] media: i2c: ov2685: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 43/78] media: i2c: ov2740: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 44/78] media: i2c: ov5647: " Mauro Carvalho Chehab
2021-04-24 8:30 ` Jacopo Mondi
2021-04-24 6:44 ` [PATCH 45/78] media: i2c: ov5648: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 46/78] media: i2c: ov5670: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 47/78] media: i2c: ov5675: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 48/78] media: i2c: ov5695: " Mauro Carvalho Chehab
2021-04-24 6:44 ` [PATCH 49/78] media: i2c: ov7740: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 50/78] media: i2c: ov8856: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 51/78] media: i2c: ov8865: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 52/78] media: i2c: ov9734: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 53/78] media: i2c: tvp5150: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 54/78] media: i2c: video-i2c: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 55/78] media: ipu3: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 56/78] media: coda: " Mauro Carvalho Chehab
2021-04-26 6:53 ` Philipp Zabel
2021-04-24 6:45 ` [PATCH 57/78] media: exynos4-is: " Mauro Carvalho Chehab
2021-04-25 20:57 ` Sylwester Nawrocki
2021-04-26 13:12 ` Mauro Carvalho Chehab
2021-04-27 8:06 ` Sylwester Nawrocki
2021-04-24 6:45 ` [PATCH 58/78] media: exynos-gsc: " Mauro Carvalho Chehab
2021-04-27 8:18 ` Sylwester Nawrocki
2021-04-27 9:30 ` Mauro Carvalho Chehab
2021-04-27 9:42 ` Mauro Carvalho Chehab
2021-04-27 11:50 ` Sylwester Nawrocki
2021-04-28 7:13 ` Mauro Carvalho Chehab
2021-04-28 7:17 ` Mauro Carvalho Chehab
2021-04-28 8:27 ` Sylwester Nawrocki [this message]
2021-04-24 6:45 ` [PATCH 59/78] media: mtk-jpeg: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 60/78] media: camss-csid: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 61/78] media: camss-csiphy: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 62/78] media: camss-ispif: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 63/78] media: camss-vfe: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 64/78] media: core: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 65/78] media: pm_helpers: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 66/78] media: vdec: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 67/78] media: venc: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 68/78] media: rcar-fcp: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 69/78] media: rcar-vin: " Mauro Carvalho Chehab
2021-04-24 8:33 ` Niklas Söderlund
2021-04-24 9:12 ` Geert Uytterhoeven
2021-04-26 13:33 ` Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 70/78] media: rga-buf: " Mauro Carvalho Chehab
2021-04-28 17:09 ` Ezequiel Garcia
2021-04-24 6:45 ` [PATCH 71/78] media: rkisp1-capture: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 72/78] media: s3c-camif: " Mauro Carvalho Chehab
2021-04-25 19:36 ` Sylwester Nawrocki
2021-04-24 6:45 ` [PATCH 73/78] media: s5p-mfc: " Mauro Carvalho Chehab
2021-04-27 9:36 ` Sylwester Nawrocki
2021-04-24 6:45 ` [PATCH 74/78] media: bdisp-v4l2: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 75/78] media: stm32: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 76/78] media: sun4i_v4l2: " Mauro Carvalho Chehab
2021-04-24 10:21 ` kernel test robot
2021-04-24 6:45 ` [PATCH 77/78] media: ti-vpe: " Mauro Carvalho Chehab
2021-04-24 6:45 ` [PATCH 78/78] media: vsp1: " Mauro Carvalho Chehab
2021-04-28 10:13 ` [PATCH 00/78] media: use pm_runtime_resume_and_get() instead of pm_runtime_get_sync() Dan Carpenter
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