From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: "Benoît Monin" <benoit.monin@bootlin.com>,
"Hans Verkuil" <hverkuil@kernel.org>
Cc: "Andi Shyti" <andi.shyti@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Jarkko Nikula" <jarkko.nikula@linux.intel.com>,
"Mika Westerberg" <mika.westerberg@linux.intel.com>,
"Jan Dabros" <jsd@semihalf.com>,
"Sebastian Andrzej Siewior" <bigeasy@linutronix.de>,
"Clark Williams" <clrkwllms@kernel.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Gregory CLEMENT" <gregory.clement@bootlin.com>,
"Théo Lebrun" <theo.lebrun@bootlin.com>,
"Tawfik Bayouk" <tawfik.bayouk@mobileye.com>,
"Vladimir Kondratiev" <vladimir.kondratiev@mobileye.com>,
"Dmitry Guzman" <dmitry.guzman@mobileye.com>,
linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev
Subject: Re: [PATCH 0/3] i2c: designware: Improve support of multi-messages transfer
Date: Sat, 18 Oct 2025 22:49:28 +0300 [thread overview]
Message-ID: <aPPvSCNnkzfH-2X7@ashevche-desk.local> (raw)
In-Reply-To: <20251017-i2c-dw-v1-0-7b85b71c7a87@bootlin.com>
+Cc: Hans. Hans, isn't it what you wanted to have for your use-case?
On Fri, Oct 17, 2025 at 04:59:31PM +0200, Benoît Monin wrote:
> Extend what can be done when transferring multiple messages in a single
> call to .xfer().
>
> Allow changing the target address by waiting for a STOP then looping
> in i2c_dw_xfer() instead of erroring out when a change of address is
> detected. The loop then re-run i2c_dw_xfer_init() which changes the
> target address and restart the transfer for the rest of the messages.
>
> Handle controllers that lack the ability to emit a RESTART when two
> consecutive messages have the same address and direction, by waiting
> for a STOP and restarting the rest of the transfer.
>
> The i2c controllers found in the EyeQ6Lplus and EyeQ7H SoC from
> Mobileye lack such capability, so compatible strings are added because
> this cannot be detected at runtime.
--
With Best Regards,
Andy Shevchenko
prev parent reply other threads:[~2025-10-18 19:49 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-17 14:59 [PATCH 0/3] i2c: designware: Improve support of multi-messages transfer Benoît Monin
2025-10-17 14:59 ` [PATCH 1/3] dt-bindings: i2c: dw: Add Mobileye I2C controllers Benoît Monin
2025-10-18 15:55 ` Krzysztof Kozlowski
2025-10-17 14:59 ` [PATCH 2/3] i2c: designware: Enable transfer with different target addresses Benoît Monin
2025-10-20 9:38 ` Hans Verkuil
2025-10-20 15:00 ` Benoît Monin
2025-10-20 19:52 ` Wolfram Sang
2025-10-22 8:36 ` Benoît Monin
2025-10-22 8:58 ` Wolfram Sang
2025-10-17 14:59 ` [PATCH 3/3] i2c: designware: Support of controller with IC_EMPTYFIFO_HOLD_MASTER disabled Benoît Monin
2025-10-18 15:55 ` Krzysztof Kozlowski
2025-10-18 19:57 ` Andy Shevchenko
2025-10-21 15:40 ` Mika Westerberg
2025-10-18 19:49 ` Andy Shevchenko [this message]
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