From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
To: Pratyush Yadav <p.yadav@ti.com>
Cc: Maxime Ripard <mripard@kernel.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Kishon Vijay Abraham I <kishon@ti.com>,
Vinod Koul <vkoul@kernel.org>,
Peter Ujfalusi <peter.ujfalusi@gmail.com>,
Steve Longerbeam <slongerbeam@gmail.com>,
Benoit Parrot <bparrot@ti.com>,
linux-media@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org,
dmaengine@vger.kernel.org, Vignesh Raghavendra <vigneshr@ti.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: Re: [PATCH v2 10/18] media: cadence: csi2rx: Populate subdev devnode
Date: Fri, 28 May 2021 10:35:11 +0300 [thread overview]
Message-ID: <e36baf77-6de8-595d-b440-92bcfcdd8467@ideasonboard.com> (raw)
In-Reply-To: <20210528072401.2vdrtjdiepnr72vv@ti.com>
On 28/05/2021 10:24, Pratyush Yadav wrote:
> On 28/05/21 10:16AM, Tomi Valkeinen wrote:
>> On 26/05/2021 18:23, Pratyush Yadav wrote:
>>> The devnode can be used by media-ctl and other userspace tools to
>>> perform configurations on the subdev. Without it, media-ctl returns
>>> ENOENT when setting format on the sensor subdev.
>>>
>>> Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
>>> ---
>>>
>>> (no changes since v1)
>>>
>>> drivers/media/platform/cadence/cdns-csi2rx.c | 1 +
>>> 1 file changed, 1 insertion(+)
>>>
>>> diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
>>> index 1df21f462f3c..49bed63d5faa 100644
>>> --- a/drivers/media/platform/cadence/cdns-csi2rx.c
>>> +++ b/drivers/media/platform/cadence/cdns-csi2rx.c
>>> @@ -613,6 +613,7 @@ static int csi2rx_probe(struct platform_device *pdev)
>>> csi2rx->pads[CSI2RX_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
>>> for (i = CSI2RX_PAD_SOURCE_STREAM0; i < CSI2RX_PAD_MAX; i++)
>>> csi2rx->pads[i].flags = MEDIA_PAD_FL_SOURCE;
>>> + csi2rx->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
>>> ret = media_entity_pads_init(&csi2rx->subdev.entity, CSI2RX_PAD_MAX,
>>> csi2rx->pads);
>>>
>>
>> I don't understand this one. There's nothing to configure in cdns-csi2rx
>> from userspace, as far as I can see, so why is the dev node needed? And why
>> would the lack of csi2rx dev node cause sensor subdev config to fail?
>
> Sensor config does not fail. But when I run media-ctl to set the format
> on /dev/media0, I get an error message that comes because the devnode
> for the bridge does not exist. I was not 100% sure about this patch but
> I figured if media-ctl expects it then it should be exposed.
>
> I don't mind dropping this patch. Just want to make sure what the right
> thing to do here is. Should every element of the pipeline have a devnode
> or not?
Tbh, I don't know. But I don't see why they should have. Also, my test
works fine if I remove the devnode here.
What media-ctl parameters did you use which fails?
Tomi
next prev parent reply other threads:[~2021-05-28 7:35 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-26 15:22 [PATCH v2 00/18] CSI2RX support on J721E Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 01/18] phy: Distinguish between Rx and Tx for MIPI D-PHY with submodes Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 02/18] phy: cdns-dphy: Prepare for Rx support Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 03/18] phy: cdns-dphy: Allow setting mode Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 04/18] phy: cdns-dphy: Add Rx support Pratyush Yadav
2021-05-28 6:09 ` Tomi Valkeinen
2021-05-26 15:22 ` [PATCH v2 05/18] media: ov5640: Use runtime PM to control sensor power Pratyush Yadav
2021-05-28 6:44 ` Tomi Valkeinen
2021-05-28 7:25 ` Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 06/18] media: cadence: csi2rx: Add external DPHY support Pratyush Yadav
2021-05-28 7:23 ` Tomi Valkeinen
2021-05-28 7:30 ` Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 07/18] media: cadence: csi2rx: Soft reset the streams before starting capture Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 08/18] media: cadence: csi2rx: Set the STOP bit when stopping a stream Pratyush Yadav
2021-05-26 15:22 ` [PATCH v2 09/18] media: cadence: csi2rx: Fix stream data configuration Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 10/18] media: cadence: csi2rx: Populate subdev devnode Pratyush Yadav
2021-05-28 7:16 ` Tomi Valkeinen
2021-05-28 7:24 ` Pratyush Yadav
2021-05-28 7:35 ` Tomi Valkeinen [this message]
2021-06-03 12:42 ` Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 11/18] dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX Pratyush Yadav
2021-05-31 6:51 ` Péter Ujfalusi
2021-05-31 9:16 ` Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 12/18] media: Re-structure TI platform drivers Pratyush Yadav
2021-05-28 8:29 ` Tomi Valkeinen
2021-05-26 15:23 ` [PATCH v2 13/18] media: ti: Add CSI2RX support for J721E Pratyush Yadav
2021-05-27 13:29 ` Tomi Valkeinen
2021-06-03 12:49 ` Pratyush Yadav
2021-06-04 8:04 ` Tomi Valkeinen
2021-05-26 15:23 ` [PATCH v2 14/18] media: dt-bindings: Add DT bindings for TI J721E CSI2RX driver Pratyush Yadav
2021-05-27 14:23 ` Rob Herring
2021-06-03 12:43 ` Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 15/18] media: dt-bindings: Convert Cadence CSI2RX binding to YAML Pratyush Yadav
2021-06-01 17:45 ` Rob Herring
2021-06-03 12:23 ` Pratyush Yadav
2021-05-26 15:23 ` [PATCH v2 16/18] phy: dt-bindings: Convert Cadence DPHY " Pratyush Yadav
2021-06-02 19:51 ` Rob Herring
2021-05-26 15:23 ` [PATCH v2 17/18] phy: dt-bindings: cdns,dphy: make clocks optional Pratyush Yadav
2021-06-02 13:27 ` Maxime Ripard
2021-06-03 8:16 ` Pratyush Yadav
2021-06-02 20:03 ` Rob Herring
2021-05-26 15:23 ` [PATCH v2 18/18] phy: dt-bindings: cdns,dphy: add power-domains property Pratyush Yadav
2021-06-02 20:03 ` Rob Herring
2021-05-27 12:42 ` [PATCH v2 00/18] CSI2RX support on J721E Tomi Valkeinen
2021-06-03 12:54 ` Pratyush Yadav
2021-05-27 13:23 ` Tomi Valkeinen
2021-06-03 12:52 ` Pratyush Yadav
2021-06-04 7:54 ` Tomi Valkeinen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=e36baf77-6de8-595d-b440-92bcfcdd8467@ideasonboard.com \
--to=tomi.valkeinen@ideasonboard.com \
--cc=bparrot@ti.com \
--cc=chunfeng.yun@mediatek.com \
--cc=devicetree@vger.kernel.org \
--cc=dmaengine@vger.kernel.org \
--cc=kishon@ti.com \
--cc=laurent.pinchart@ideasonboard.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-phy@lists.infradead.org \
--cc=mchehab@kernel.org \
--cc=mripard@kernel.org \
--cc=p.yadav@ti.com \
--cc=peter.ujfalusi@gmail.com \
--cc=robh+dt@kernel.org \
--cc=slongerbeam@gmail.com \
--cc=vigneshr@ti.com \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).