linux-kernel - Re: [PATCH v3 3/9] soc: mediatek: cmdq: add write_s

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Message-ID: <d37643f0-bf2e-264a-6dc1-cdd485b18576@gmail.com>
Date:   Mon, 21 Sep 2020 18:15:47 +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 3/9] soc: mediatek: cmdq: add write_s_mask function



On 07/07/2020 17:45, Dennis YC Hsieh wrote:
> add write_s_mask function in cmdq helper functions which
> writes value contains in internal register to address
> with mask and 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   |   23 +++++++++++++++++++++++
>   include/linux/mailbox/mtk-cmdq-mailbox.h |    1 +
>   include/linux/soc/mediatek/mtk-cmdq.h    |   18 ++++++++++++++++++
>   3 files changed, 42 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 880349b3f16c..550e9e7e3ff2 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -242,6 +242,29 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>   }
>   EXPORT_SYMBOL(cmdq_pkt_write_s);
>   
> +int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> +			  u16 addr_low, u16 src_reg_idx, u32 mask)
> +{
> +	struct cmdq_instruction inst = {};
> +	int err;
> +
> +	inst.op = CMDQ_CODE_MASK;
> +	inst.mask = ~mask;
> +	err = cmdq_pkt_append_command(pkt, inst);
> +	if (err < 0)
> +		return err;
> +
> +	inst.mask = 0;
> +	inst.op = CMDQ_CODE_WRITE_S_MASK;
> +	inst.src_t = CMDQ_REG_TYPE;
> +	inst.sop = high_addr_reg_idx;
> +	inst.offset = addr_low;
> +	inst.src_reg = src_reg_idx;
> +
> +	return cmdq_pkt_append_command(pkt, inst);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_write_s_mask);
> +
>   int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
>   {
>   	struct cmdq_instruction inst = { {0} };
> diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
> index 1f76cfedb16d..90d1d8e64412 100644
> --- a/include/linux/mailbox/mtk-cmdq-mailbox.h
> +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
> @@ -61,6 +61,7 @@ enum cmdq_code {
>   	CMDQ_CODE_WFE = 0x20,
>   	CMDQ_CODE_EOC = 0x40,
>   	CMDQ_CODE_WRITE_S = 0x90,
> +	CMDQ_CODE_WRITE_S_MASK = 0x91,
>   	CMDQ_CODE_LOGIC = 0xa0,
>   };
>   
> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> index 9b0c57a0063d..53230341bf94 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -122,6 +122,24 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>   		     u16 addr_low, u16 src_reg_idx);
>   
>   /**
> + * cmdq_pkt_write_s_mask() - append write_s with mask command to the CMDQ packet
> + * @pkt:	the CMDQ packet
> + * @high_addr_reg_idx:	internal register ID which contains high address of pa
> + * @addr_low:	low address of pa
> + * @src_reg_idx:	the CMDQ internal register ID which cache source value
> + * @mask:	the specified target address mask, use U32_MAX if no need
> + *
> + * Return: 0 for success; else the error code is returned
> + *
> + * Support write value to physical address without subsys. Use CMDQ_ADDR_HIGH()
> + * to get high address and call cmdq_pkt_assign() to assign value into internal
> + * reg. Also use CMDQ_ADDR_LOW() to get low address for addr_low parameter when
> + * call to this function.
> + */
> +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_wfe() - append wait for event command to the CMDQ packet
>    * @pkt:	the CMDQ packet
>    * @event:	the desired event type to "wait and CLEAR"
>