linux-kernel - Re: [PATCH] soc: mediatek: cmdq: Use mailbox rx_callback instead of cmdq_task

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Date:   Fri, 11 Feb 2022 07:02:26 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Matthias Brugger <matthias.bgg@...il.com>
Cc:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Houlong Wei <houlong.wei@...iatek.com>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH] soc: mediatek: cmdq: Use mailbox rx_callback instead of cmdq_task_cb

Hi, Matthias:

Matthias Brugger <matthias.bgg@...il.com> 於 2021年10月8日 週五 下午10:30寫道：
>
> Hi Chun-Kuang,
>
> On 08/10/2021 16:15, Chun-Kuang Hu wrote:
> > Hi, Matthias:
> >
> > Please ignore this patch because this patch depend on [1] which would
> > cause numerous warning message. So I would revert that patch in [2].
> >
>
> Thanks for the head-ups. I'll ignore this patch.

This patch depend on [3] which has been merged into mainline, so you
could  start to review this parch.

[3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/mediatek?h=v5.17-rc3&id=1ee07a683b7e4e6ad9ad4f77fce4751741bc8ceb

Regards,
Chun-Kuang.

>
> Regards,
> Matthias
>
> > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/mediatek?h=v5.15-rc4&id=c1ec54b7b5af25c779192253f5a9f05e95cb43d7
> > [2] https://patchwork.kernel.org/project/linux-mediatek/patch/20211007235310.14626-6-chunkuang.hu@kernel.org/
> >
> > Regards,
> > Chun-Kuang.
> >
> > Chun-Kuang Hu <chunkuang.hu@...nel.org> 於 2021年9月16日 週四 上午7:27寫道：
> >>
> >> rx_callback is a standard mailbox callback mechanism and could cover the
> >> function of proprietary cmdq_task_cb, so use the standard one instead of
> >> the proprietary one. Client has changed to use the standard callback
> >> machanism and sync dma buffer in client driver, so remove the proprietary
> >> callback in cmdq helper.
> >>
> >> Signed-off-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>
> >> ---
> >>   drivers/soc/mediatek/mtk-cmdq-helper.c | 25 +------------------------
> >>   include/linux/soc/mediatek/mtk-cmdq.h  |  5 +----
> >>   2 files changed, 2 insertions(+), 28 deletions(-)
> >>
> >> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> >> index 3c8e4212d941..c1837a468267 100644
> >> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> >> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> >> @@ -425,34 +425,11 @@ int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
> >>   }
> >>   EXPORT_SYMBOL(cmdq_pkt_finalize);
> >>
> >> -static void cmdq_pkt_flush_async_cb(struct cmdq_cb_data data)
> >> -{
> >> -       struct cmdq_pkt *pkt = (struct cmdq_pkt *)data.data;
> >> -       struct cmdq_task_cb *cb = &pkt->cb;
> >> -       struct cmdq_client *client = (struct cmdq_client *)pkt->cl;
> >> -
> >> -       dma_sync_single_for_cpu(client->chan->mbox->dev, pkt->pa_base,
> >> -                               pkt->cmd_buf_size, DMA_TO_DEVICE);
> >> -       if (cb->cb) {
> >> -               data.data = cb->data;
> >> -               cb->cb(data);
> >> -       }
> >> -}
> >> -
> >> -int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb,
> >> -                        void *data)
> >> +int cmdq_pkt_flush_async(struct cmdq_pkt *pkt)
> >>   {
> >>          int err;
> >>          struct cmdq_client *client = (struct cmdq_client *)pkt->cl;
> >>
> >> -       pkt->cb.cb = cb;
> >> -       pkt->cb.data = data;
> >> -       pkt->async_cb.cb = cmdq_pkt_flush_async_cb;
> >> -       pkt->async_cb.data = pkt;
> >> -
> >> -       dma_sync_single_for_device(client->chan->mbox->dev, pkt->pa_base,
> >> -                                  pkt->cmd_buf_size, DMA_TO_DEVICE);
> >> -
> >>          err = mbox_send_message(client->chan, pkt);
> >>          if (err < 0)
> >>                  return err;
> >> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> >> index ac6b5f3cba95..2b498f4f3946 100644
> >> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> >> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> >> @@ -268,8 +268,6 @@ int cmdq_pkt_finalize(struct cmdq_pkt *pkt);
> >>    * cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ
> >>    *                          packet and call back at the end of done packet
> >>    * @pkt:       the CMDQ packet
> >> - * @cb:                called at the end of done packet
> >> - * @data:      this data will pass back to cb
> >>    *
> >>    * Return: 0 for success; else the error code is returned
> >>    *
> >> @@ -277,7 +275,6 @@ int cmdq_pkt_finalize(struct cmdq_pkt *pkt);
> >>    * at the end of done packet. Note that this is an ASYNC function. When the
> >>    * function returned, it may or may not be finished.
> >>    */
> >> -int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb,
> >> -                        void *data);
> >> +int cmdq_pkt_flush_async(struct cmdq_pkt *pkt);
> >>
> >>   #endif /* __MTK_CMDQ_H__ */
> >> --
> >> 2.25.1
> >>