[PATCH 08/15] soc: mediatek: Add cmdq_pkt_finalize_loop to CMDQ driver

[Krzysztof Kozlowski]

On 18/09/2023 21:21, Jason-JH.Lin wrote:
> 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.
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin at mediatek.com>
> ---
>  drivers/soc/mediatek/mtk-cmdq-helper.c | 23 +++++++++++++++++++++++
>  include/linux/soc/mediatek/mtk-cmdq.h  |  8 ++++++++
>  2 files changed, 31 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 4be2a18a4a02..bbb127620bb3 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -475,6 +475,29 @@ int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
>  }
>  EXPORT_SYMBOL(cmdq_pkt_finalize);
>  
> +int cmdq_pkt_finalize_loop(struct cmdq_pkt *pkt)
> +{
> +	struct cmdq_instruction inst = { {0} };
> +	int err;
> +
> +	/* insert EOC and generate IRQ for each command iteration */
> +	inst.op = CMDQ_CODE_EOC;
> +	inst.value = CMDQ_EOC_IRQ_EN;
> +	err = cmdq_pkt_append_command(pkt, inst);
> +	if (err < 0)
> +		return err;
> +
> +	/* JUMP to start of pkt */
> +	err = cmdq_pkt_jump(pkt, pkt->pa_base);
> +	if (err < 0)
> +		return err;
> +
> +	pkt->loop = true;
> +
> +	return err;
> +}
> +EXPORT_SYMBOL(cmdq_pkt_finalize_loop);

1. Missing GPL
2. Missing kerneldoc
3. Missing user
4. Are you going to split the patchset into one function per patch? No.

Best regards,
Krzysztof