linux-kernel - Re: [PATCH v2 5/9] soc: mailbox: Add cmdq_pkt_finalize

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Message-ID: <6d9c38efc2acb4eeb4c46e1bb9fa89d21e948982.camel@mediatek.com>
Date:   Wed, 25 Oct 2023 00:55:45 +0000
From:   Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>
To:     "jassisinghbrar@...il.com" <jassisinghbrar@...il.com>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Singo Chang (張興國) 
        <Singo.Chang@...iatek.com>,
        Johnson Wang (王聖鑫) 
        <Johnson.Wang@...iatek.com>,
        Jason-ch Chen (陳建豪) 
        <Jason-ch.Chen@...iatek.com>,
        Shawn Sung (宋孝謙) 
        <Shawn.Sung@...iatek.com>,
        Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>,
        "jkardatzke@...gle.com" <jkardatzke@...gle.com>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>
Subject: Re: [PATCH v2 5/9] soc: mailbox: Add cmdq_pkt_finalize_loop to
 support looping cmd with irq

On Mon, 2023-10-23 at 11:50 +0200, AngeloGioacchino Del Regno wrote:
> Il 23/10/23 06:37, Jason-JH.Lin ha scritto:
> > Add cmdq_pkt_finalize_loop to CMDQ driver.
> > 
> > cmdq_pkt_finalize_loop appends end of command(EOC) instruction and
> > jump to start of command buffer instruction to make the command
> > buffer loopable.
> > 
> > GCE irq occurs when GCE executes to the EOC instruction.
> > CMDQ client can use a loop flag to mark the CMDQ packet as looping
> > packet. If the CMDQ packet is a loopping packet, GCE irq handler
> > won't delete the CMDQ task and disable the GCE thread.
> > 
> > Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> > ---
> >   drivers/mailbox/mtk-cmdq-mailbox.c       | 11 +++++++++++
> >   drivers/soc/mediatek/mtk-cmdq-helper.c   | 23
> > +++++++++++++++++++++++
> >   include/linux/mailbox/mtk-cmdq-mailbox.h |  1 +
> >   include/linux/soc/mediatek/mtk-cmdq.h    |  8 ++++++++
> >   4 files changed, 43 insertions(+)
> > 
> > diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c
> > b/drivers/mailbox/mtk-cmdq-mailbox.c
> > index 4d62b07c1411..56fe01cd9731 100644
> > --- a/drivers/mailbox/mtk-cmdq-mailbox.c
> > +++ b/drivers/mailbox/mtk-cmdq-mailbox.c
> 
> It's true that without the changes in soc/mediatek this is not doing
> anything, but
> mailbox/mtk-cmdq-mailbox.c goes through a different maintainer...
> 
> Please split the changes to drivers/mailbox/mtk-cmdq-mailbox.c and
> its header to a
> different commit.
> 
> Hint:
> 1. soc: mediatek: cmdq: Add cmdq_pkt_finalize_loop for looping cmd
> with irq
> 2. mailbox: mtk-cmdq: Support GCE loop packets in interrupt handler
> 

That's what I have done in the previous version.
Because of Krzysztof's comment here:
https://patchwork.kernel.org/project/linux-mediatek/patch/20230918192204.32263-8-jason-jh.lin@mediatek.com/#25527450
I squash them together. I'm not sure if I misunderstood that.

But I think I should follow the maintainer who can apply the patch.
So I'll split it in the next version.

Regards,
Jason-JH.Lin

> Thanks,
> Angelo
>