[Skiboot] [PATCH v2] platform/mihawk: Tune equalization settings for opencapi
Andrew Donnellan
ajd at linux.ibm.com
Mon May 11 19:18:36 AEST 2020
On 24/4/20 3:54 am, Frederic Barrat wrote:
> The Bittware 250SOC adapter on Mihawk was showing a high count of CRC
> errors on one of the opencapi slots. The PHY team suggested new
> equalization settings to correct the errors.
>
> All existing adapters have been tested on mihawk to make sure the
> settings are compatible. However, the new settings should not be used
> on platforms other than mihawk.
>
> The changes specific to mihawk are:
> - Update the tx_ffe_pre_coeff and tx_ffe_post_coeff input parameters
> used during zcal
> - turn off the tx_ffe_boost parameter through scom
>
> Signed-off-by: Frederic Barrat <fbarrat at linux.ibm.com>
> Cc: skiboot-stable at lists.ozlabs.org # skiboot-op940.x
> ---
>
> Vasant, Oliver: this is for mihawk and should not have any side effect
> on other plaforms. At this point, I'm thoroughly confused whether it
> should go to the skiboot-op940.x branch, as I'm hearing conflicting
> signals. In any case, it should go to master for our own good and be
> able to use our lab systems. Time will sort out the skiboot-op940.x
> status.
>
>
>
> Changelog:
> v2: avoid globals (Andrew)
>
Thanks.
Reviewed-by: Andrew Donnellan <ajd at linux.ibm.com>
--
Andrew Donnellan OzLabs, ADL Canberra
ajd at linux.ibm.com IBM Australia Limited
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