linux-kernel - Re: [PATCH v3 5/9] soc: mediatek: cmdq: add write

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Message-ID: <db10d46a-18fb-345f-17a2-b847fb8d0bac@gmail.com>
Date:   Mon, 21 Sep 2020 18:16:15 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, CK Hu <ck.hu@...iatek.com>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>
Cc:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        wsd_upstream@...iatek.com, HS Liao <hs.liao@...iatek.com>
Subject: Re: [PATCH v3 5/9] soc: mediatek: cmdq: add write_s value function



On 07/07/2020 17:45, Dennis YC Hsieh wrote:
> add write_s function in cmdq helper functions which
> writes a constant value to address with large dma
> access support.
> 
> Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>

Now pushed to v5.9-next/soc

Thanks!

> ---
>   drivers/soc/mediatek/mtk-cmdq-helper.c |   14 ++++++++++++++
>   include/linux/soc/mediatek/mtk-cmdq.h  |   13 +++++++++++++
>   2 files changed, 27 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index ed9f5e63c195..4e86b65815fc 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -280,6 +280,20 @@ int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>   }
>   EXPORT_SYMBOL(cmdq_pkt_write_s_mask);
>   
> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
> +			   u16 addr_low, u32 value)
> +{
> +	struct cmdq_instruction inst = {};
> +
> +	inst.op = CMDQ_CODE_WRITE_S;
> +	inst.sop = high_addr_reg_idx;
> +	inst.offset = addr_low;
> +	inst.value = value;
> +
> +	return cmdq_pkt_append_command(pkt, inst);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_write_s_value);
> +
>   int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
>   {
>   	struct cmdq_instruction inst = { {0} };
> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> index cd7ec714344e..ae73e10da274 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -152,6 +152,19 @@ int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>   			  u16 addr_low, u16 src_reg_idx, u32 mask);
>   
>   /**
> + * cmdq_pkt_write_s_value() - append write_s command to the CMDQ packet which
> + *			      write value to a physical address
> + * @pkt:	the CMDQ packet
> + * @high_addr_reg_idx:	internal register ID which contains high address of pa
> + * @addr_low:	low address of pa
> + * @value:	the specified target value
> + *
> + * Return: 0 for success; else the error code is returned
> + */
> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
> +			   u16 addr_low, u32 value);
> +
> +/**
>    * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
>    * @pkt:	the CMDQ packet
>    * @event:	the desired event type to "wait and CLEAR"
>