All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>
To: Hans Verkuil <hverkuil-cisco@xs4all.nl>, linux-media@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org,
	"Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>
Subject: [PATCH] media: rcar-vin: Disallow unbinding and binding of individual VINs
Date: Sun, 28 Nov 2021 14:24:47 +0100	[thread overview]
Message-ID: <20211128132447.142671-1-niklas.soderlund+renesas@ragnatech.se> (raw)

The VIN driver have an internal concept of capture groups that covers
multiple instances of the driver. This is handled using the shared media
graph and a single notifier shared between all VIN instances.

This design do not work well if an individual VIN where to be unbound on
its own. The design could be improved up on to allow for this but would
require large changes in the v4l2-async framework. To avoid the
situation suppress the bind and unbind nodes in sysfs.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c
index b58c8bbe1cf33908..0186ae235113bb8f 100644
--- a/drivers/media/platform/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/rcar-vin/rcar-core.c
@@ -1618,6 +1618,7 @@ static SIMPLE_DEV_PM_OPS(rvin_pm_ops, rvin_suspend, rvin_resume);
 static struct platform_driver rcar_vin_driver = {
 	.driver = {
 		.name = "rcar-vin",
+		.suppress_bind_attrs = true,
 		.pm = &rvin_pm_ops,
 		.of_match_table = rvin_of_id_table,
 	},
-- 
2.34.1


                 reply	other threads:[~2021-11-28 13:33 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=20211128132447.142671-1-niklas.soderlund+renesas@ragnatech.se \
    --to=niklas.soderlund+renesas@ragnatech.se \
    --cc=hverkuil-cisco@xs4all.nl \
    --cc=linux-media@vger.kernel.org \
    --cc=linux-renesas-soc@vger.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.