linux-kernel - RE: [PATCH V7 0/4] mailbox/firmware: imx: support SCU channel type

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Date:   Tue, 31 Mar 2020 13:34:41 +0000
From:   Peng Fan <peng.fan@....com>
To:     Peng Fan <peng.fan@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "jassisinghbrar@...il.com" <jassisinghbrar@...il.com>,
        "o.rempel@...gutronix.de" <o.rempel@...gutronix.de>,
        Leonard Crestez <leonard.crestez@....com>
CC:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        Anson Huang <anson.huang@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH V7 0/4] mailbox/firmware: imx: support SCU channel type

Hi Jassi,

> Subject: [PATCH V7 0/4] mailbox/firmware: imx: support SCU channel type

Are you ok with the mailbox part?

Thanks,
Peng.

> 
> From: Peng Fan <peng.fan@....com>
> 
> V7:
>  Per Leonard's comments, added check for TE/RE  Passed test from
> Leonard's https://github.com/cdleonard/imx-scu-test
> 
> V6:
>  Add Oleksij's R-b tag
>  Patch 3/4, per
> https://www.kernel.org/doc/Documentation/printk-formats.txt
>  should use %zu for printk sizeof
> 
> V5:
>  Move imx_mu_dcfg below imx_mu_priv
>  Add init hooks to imx_mu_dcfg
>  drop __packed __aligned
>  Add more debug msg
>  code style cleanup
> 
> V4:
>  Drop IMX_MU_TYPE_[GENERIC, SCU]
>  Pack MU chans init to separate function  Add separate function for SCU
> chans init and xlate  Add santity check to msg hdr.size  Limit SCU MU chans
> to 6, TX0/RX0/RXDB[0-3]
> 
> V3:
>  Rebase to Shawn's for-next
>  Include fsl,imx8-mu-scu compatible
>  Per Oleksij's comments, introduce generic tx/rx and added scu mu type
> Check fsl,imx8-mu-scu in firmware driver for fast_ipc
> 
> V2:
>  Drop patch 1/3 which added fsl,scu property  Force to use scu channel type
> when machine has node compatible "fsl,imx-scu"
>  Force imx-scu to use fast_ipc
> 
>  I not found a generic method to make SCFW message generic enough, SCFW
> message is not fixed length including TX and RX. And it use TR0/RR0
> interrupt.
> 
> V1:
> Sorry to bind the mailbox/firmware patch together. This is make it to
> understand what changed to support using 1 TX and 1 RX channel for SCFW
> message.
> 
> Per i.MX8QXP Reference mannual, there are several message using examples.
> One of them is:
> Passing short messages: Transmit register(s) can be used to pass short
> messages from one to four words in length. For example, when a four-word
> message is desired, only one of the registers needs to have its corresponding
> interrupt enable bit set at the receiver side.
> 
> This patchset is to using this for SCFW message to replace four TX and four RX
> method.
> 
> Peng Fan (4):
>   dt-bindings: mailbox: imx-mu: add SCU MU support
>   mailbox: imx: restructure code to make easy for new MU
>   mailbox: imx: add SCU MU support
>   firmware: imx-scu: Support one TX and one RX
> 
>  .../devicetree/bindings/mailbox/fsl,mu.txt         |   2 +
>  drivers/firmware/imx/imx-scu.c                     |  54 +++-
>  drivers/mailbox/imx-mailbox.c                      | 288
> +++++++++++++++++----
>  3 files changed, 281 insertions(+), 63 deletions(-)
> 
> 
> base-commit: e506dba69a5e9aaff20fd73a108639f84e2c39d9
> --
> 2.16.4