linux-kernel - Re: [PATCH v4] i2c: designware: Add driver support for AMD NAVI GPU

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Date:   Mon, 5 Apr 2021 22:54:52 +0200
From:   Wolfram Sang <wsa@...nel.org>
To:     Sanket Goswami <Sanket.Goswami@....com>
Cc:     jarkko.nikula@...ux.intel.com, andriy.shevchenko@...ux.intel.com,
        mika.westerberg@...ux.intel.com, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Nehal Bakulchandra Shah <Nehal-Bakulchandra.shah@....com>
Subject: Re: [PATCH v4] i2c: designware: Add driver support for AMD NAVI GPU

On Wed, Mar 31, 2021 at 07:37:30PM +0530, Sanket Goswami wrote:
> The Latest AMD NAVI GPU card has an integrated Type-C controller and
> Designware I2C with PCI Interface. The PD controller for USB Type-C can
> be accessed over I2C. The client driver is part of the USB Type-C UCSI
> driver.
> 
> Also, there exists a couple of notable IP limitations that are dealt as
> workarounds:
> - I2C transaction work on a polling mode as IP does not generate
> interrupt.
> - I2C read command sent twice to address the IP issues.
> - AMD NAVI GPU based products are already in the commercial market,
>   hence some of the I2C parameters are statically programmed as they
>   can not be part of the ACPI table.
> 
> Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k@....com>
> Co-developed-by: Nehal Bakulchandra Shah <Nehal-Bakulchandra.shah@....com>
> Signed-off-by: Nehal Bakulchandra Shah <Nehal-Bakulchandra.shah@....com>
> Signed-off-by: Sanket Goswami <Sanket.Goswami@....com>

Applied to for-next, thanks!


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