Linux Media Controller development
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From: Richard Leitner <richard.leitner@linux.dev>
To: Mauro Carvalho Chehab <mchehab@kernel.org>,
	 Sakari Ailus <sakari.ailus@linux.intel.com>,
	 Dave Stevenson <dave.stevenson@raspberrypi.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	 Hans de Goede <hansg@kernel.org>,
	linux-media@vger.kernel.org,  linux-kernel@vger.kernel.org,
	Richard Leitner <richard.leitner@linux.dev>
Subject: [PATCH 0/2] media: v4l2-cci/ov9282: support single-read I2C transactions
Date: Tue, 21 Jul 2026 15:25:27 +0200	[thread overview]
Message-ID: <20260721-cci-single-v1-0-8485171e1393@linux.dev> (raw)

This series adds support for configuring transport-specific CCI regmap
behavior for I2C sensors, which is then used in the OV9282 driver to
force single-register read transactions.

The motivation for this change is that some OV9282 camera modules require
single-read I2C transactions to operate correctly. In particular, OV9282
modules from Vision Components return invalid data on multi-byte reads,
while switching the regmap to single-read transactions fixes the problem.

This series does not change the default behavior of existing CCI users.
Only ov9282 opts into single-read transactions.

Signed-off-by: Richard Leitner <richard.leitner@linux.dev>
---
Richard Leitner (2):
      media: v4l2-cci: Add support for custom regmap configuration
      media: ov9282: enable single-read I2C transactions

 drivers/media/i2c/ov9282.c         |  7 ++++++-
 drivers/media/v4l2-core/v4l2-cci.c | 23 +++++++++++++++++++----
 include/media/v4l2-cci.h           | 37 ++++++++++++++++++++++++++++++++++++-
 3 files changed, 61 insertions(+), 6 deletions(-)
---
base-commit: 1590cf0329716306e948a8fc29f1d3ee87d3989f
change-id: 20260717-cci-single-29bbb89775c4

Best regards,
--  
Richard Leitner <richard.leitner@linux.dev>



             reply	other threads:[~2026-07-21 13:25 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-21 13:25 Richard Leitner [this message]
2026-07-21 13:25 ` [PATCH 1/2] media: v4l2-cci: Add support for custom regmap configuration Richard Leitner
2026-07-21 13:25 ` [PATCH 2/2] media: ov9282: enable single-read I2C transactions Richard Leitner
2026-07-21 13:38   ` Alexander Stein
2026-07-21 15:12     ` Laurent Pinchart
2026-07-21 15:15     ` Richard Leitner
2026-07-21 15:32       ` Laurent Pinchart
2026-07-21 15:57         ` Richard Leitner
2026-07-21 13:39   ` Dave Stevenson
2026-07-21 15:16     ` Laurent Pinchart
2026-07-21 15:44       ` Richard Leitner
2026-07-21 15:58         ` Laurent Pinchart
2026-07-21 16:01           ` Richard Leitner

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