linux-kernel - Re: [PATCH 3/9] soc: mediatek: cmdq: Add cmdq_pkt

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Message-ID: <1821c17e-6a40-4d1a-bc5a-06e8dd944456@collabora.com>
Date: Thu, 15 Feb 2024 11:40:43 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Chun-Kuang Hu <chunkuang.hu@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: Re: [PATCH 3/9] soc: mediatek: cmdq: Add cmdq_pkt_eoc() helper
 function

Il 15/02/24 01:49, Chun-Kuang Hu ha scritto:
> cmdq_pkt_eoc() append eoc command to CMDQ packet. eoc command
> would ask GCE to generate IRQ. It's usually appended to the end
> of packet to notify all command in the packet is done.
> 
> Signed-off-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>
> ---
>   drivers/soc/mediatek/mtk-cmdq-helper.c | 10 ++++++++++
>   include/linux/soc/mediatek/mtk-cmdq.h  | 15 +++++++++++++++
>   2 files changed, 25 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index ed4ef95adf5b..e982997117c2 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -359,6 +359,16 @@ int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa)
>   }
>   EXPORT_SYMBOL(cmdq_pkt_jump);
>   
> +int cmdq_pkt_eoc(struct cmdq_pkt *pkt)
> +{
> +	struct cmdq_instruction inst = { {0} };
> +
> +	inst.op = CMDQ_CODE_EOC;
> +	inst.value = CMDQ_EOC_IRQ_EN;
> +	return cmdq_pkt_append_command(pkt, inst);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_eoc);
> +
>   int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
>   {
>   	struct cmdq_instruction inst = { {0} };
> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> index 6215191a328d..a67f719dec0b 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -245,6 +245,16 @@ int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value);
>    */
>   int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa);
>   
> +/**
> + * cmdq_pkt_eoc() - Append eoc command to the CMDQ packet, ask GCE
> + *		    to generate IRQ. It's usually appended to the end of
> + *		    packet to notify that all command in the packet is done.
> + * @pkt:	the CMDQ packet
> + *
> + * Return: 0 for success; else the error code is returned

/**
  * cmdq_pkt_eoc() - Append EOC and ask GCE to generate an IRQ at end of execution
  * @pkt:	The CMDQ packet
  *
  * Appends an End Of Code (EOC) command to the CMDQ packet and asks the GCE
  * to generate an interrupt at the end of the execution of all commands in
  * the pipeline.
  * The EOC command is usually appended to the end of the pipeline to notify
  * that all commands are done.
  *
  * Return: 0 for success or negative error number
  */

Apart from that,

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> + */
> +int cmdq_pkt_eoc(struct cmdq_pkt *pkt);
> +
>   /**
>    * cmdq_pkt_finalize() - Append EOC and jump command to pkt.
>    * @pkt:	the CMDQ packet
> @@ -346,6 +356,11 @@ static inline int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_
>   	return -EINVAL;
>   }
>   
> +static inline int cmdq_pkt_eoc(struct cmdq_pkt *pkt)
> +{
> +	return -EINVAL;
> +}
> +
>   static inline int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
>   {
>   	return -EINVAL;