Re: [PATCH v2] i2c: designware: Introduce semaphore reservation timer to AMDPSP driver

Jarkko Nikula
2022-08-15T11:17:59Z

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>