From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
To: Jan Dabros <jsd@semihalf.com>,
linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,
andriy.shevchenko@linux.intel.com
Cc: mika.westerberg@linux.intel.com, rrangel@chromium.org,
mw@semihalf.com, upstream@semihalf.com
Subject: Re: [PATCH v2] i2c: designware: Introduce semaphore reservation timer to AMDPSP driver
Date: Mon, 15 Aug 2022 14:17:53 +0300 [thread overview]
Message-ID: <a6e5b123-91da-b32d-be40-d88a82e4374e@linux.intel.com> (raw)
In-Reply-To: <20220812071526.414285-1-jsd@semihalf.com>
On 8/12/22 10:15, Jan Dabros wrote:
> In order to optimize performance, limit amount of back and forth
> transactions between x86 and PSP. This is done by introduction of
> semaphore reservation period - that is window in which x86 isn't
> releasing the bus immediately after each I2C transaction.
>
> In order to protect PSP from being starved while waiting for
> arbitration, after a programmed time bus is automatically released by a
> deferred function.
>
> Signed-off-by: Jan Dabros <jsd@semihalf.com>
> ---
> drivers/i2c/busses/i2c-designware-amdpsp.c | 68 +++++++++++++++++-----
> 1 file changed, 53 insertions(+), 15 deletions(-)
>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
next prev parent reply other threads:[~2022-08-15 11:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-12 7:15 [PATCH v2] i2c: designware: Introduce semaphore reservation timer to AMDPSP driver Jan Dabros
2022-08-15 11:17 ` Jarkko Nikula [this message]
2022-08-22 10:31 ` Jan Dąbroś
2022-08-20 6:30 ` Wolfram Sang
2022-08-22 10:35 ` Jan Dąbroś
2022-08-22 11:02 ` Wolfram Sang
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