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Date: Fri, 12 May 2017 11:58:48 +0200
From: Wolfram Sang <wsa@the-dreams.de>
To: Jacopo Mondi <jacopo@jmondi.org>
Cc: laurent.pinchart@ideasonboard.com, mchehab@kernel.org,
        hans.verkuil@cisco.com, sakari.ailus@linux.intel.com,
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Subject: Re: [PATCH] media: i2c: ov772x: Force use of SCCB protocol
Message-ID: <20170512095847.GA3147@katana>
References: <1494582763-22385-1-git-send-email-jacopo@jmondi.org>
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On Fri, May 12, 2017 at 11:52:43AM +0200, Jacopo Mondi wrote:
> Force use of Omnivision's SCCB protocol and make sure the I2c adapter
> supports protocol mangling during probe.
>=20
> Testing done on SH4 Migo-R board.
> As commit:
> [e789029761503f0cce03e8767a56ae099b88e1bd]
> "i2c: sh_mobile: don't send a stop condition by default inside transfers"
> makes the i2c adapter emit a stop bit between messages in a single
> transfer only when explicitly required, the ov772x driver fails to
> probe due to i2c transfer timeout without SCCB flag set.
>=20
> i2c-sh_mobile i2c-sh_mobile.0: Transfer request timed out
> ov772x 0-0021: Product ID error 92:92
>=20
> With this patch applied:
>=20
> soc-camera-pdrv soc-camera-pdrv.0: Probing soc-camera-pdrv.0
> ov772x 0-0021: ov7725 Product ID 77:21 Manufacturer ID 7f:a2
>=20
> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>


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