Re: [PATCH v1, 4/5] soc: mediatek: cmdq: add address shift in jump

[Nicolas Boichat]

On Sat, Dec 5, 2020 at 12:16 PM Yongqiang Niu
<yongqiang.niu@xxxxxxxxxxxx> wrote:
>
> Add address shift when compose jump instruction
> to compatible with 35bit format.

This looks reasonable, but task->cmdq->shift_pa is not new and was
introduced as part of mt6779 GCE support.

Do you want to add a Fixes tag?
Fixes: 0858fde496f8 ("mailbox: cmdq: variablize address shift in platform")

Reviewed-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>

>
> Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> ---
>  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 1c01fe0..5ed39f8 100644
> --- a/drivers/mailbox/mtk-cmdq-mailbox.c
> +++ b/drivers/mailbox/mtk-cmdq-mailbox.c
> @@ -174,7 +174,8 @@ 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);
>
> --
> 1.8.1.1.dirty
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