linux-kernel - Re: [PATCH v2] soc: mediatek: cmdq: add address shift in jump

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Date:   Fri, 8 Jan 2021 09:48:05 +0800
From:   Yongqiang Niu <yongqiang.niu@...iatek.com>
To:     CK Hu <ck.hu@...iatek.com>, Jassi Brar <jassisinghbrar@...il.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "David Airlie" <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        <damon.chu@...iatek.com>, <dennis-yc.hsieh@...iatek.com>
Subject: Re: [PATCH v2] soc: mediatek: cmdq: add address shift in jump

On Wed, 2020-12-23 at 16:34 +0800, Yongqiang Niu wrote:
> Add address shift when compose jump instruction
> to compatible with 35bit format.
> 
> Fixes: 0858fde496f8 ("mailbox: cmdq: variablize address shift in platform")
> 
> Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
> Reviewed-by: Nicolas Boichat <drinkcat@...omium.org>
> ---
>  drivers/mailbox/mtk-cmdq-mailbox.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
> index 5665b6e..75378e3 100644
> --- a/drivers/mailbox/mtk-cmdq-mailbox.c
> +++ b/drivers/mailbox/mtk-cmdq-mailbox.c
> @@ -168,7 +168,8 @@ static void cmdq_task_insert_into_thread(struct cmdq_task *task)
>  	dma_sync_single_for_cpu(dev, prev_task->pa_base,
>  				prev_task->pkt->cmd_buf_size, DMA_TO_DEVICE);
>  	prev_task_base[CMDQ_NUM_CMD(prev_task->pkt) - 1] =
> -		(u64)CMDQ_JUMP_BY_PA << 32 | task->pa_base;
> +		(u64)CMDQ_JUMP_BY_PA << 32 |
> +		(task->pa_base >> task->cmdq->shift_pa);
>  	dma_sync_single_for_device(dev, prev_task->pa_base,
>  				   prev_task->pkt->cmd_buf_size, DMA_TO_DEVICE);
>  

hi jassi

please confirm is there any question about this patch.
if not, please apply this into next version, tks