linux-kernel - Re: [PATCH v3 2/9] soc: mediatek: cmdq: add write

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Message-ID: <1fa46c55-2bc9-ad73-bb65-91825fcd4b9e@gmail.com>
Date:   Mon, 21 Sep 2020 18:15:29 +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 2/9] soc: mediatek: cmdq: add write_s function



On 07/07/2020 17:45, Dennis YC Hsieh wrote:
> add write_s function in cmdq helper functions which
> writes value contains in internal register 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   |   19 +++++++++++++++++++
>   include/linux/mailbox/mtk-cmdq-mailbox.h |    1 +
>   include/linux/soc/mediatek/mtk-cmdq.h    |   19 +++++++++++++++++++
>   3 files changed, 39 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 9faf78fbed3a..880349b3f16c 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -18,6 +18,10 @@ struct cmdq_instruction {
>   	union {
>   		u32 value;
>   		u32 mask;
> +		struct {
> +			u16 arg_c;
> +			u16 src_reg;
> +		};
>   	};
>   	union {
>   		u16 offset;
> @@ -223,6 +227,21 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
>   }
>   EXPORT_SYMBOL(cmdq_pkt_write_mask);
>   
> +int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> +		     u16 addr_low, u16 src_reg_idx)
> +{
> +	struct cmdq_instruction inst = {};
> +
> +	inst.op = CMDQ_CODE_WRITE_S;
> +	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);
> +
>   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 05eea1aef5aa..1f76cfedb16d 100644
> --- a/include/linux/mailbox/mtk-cmdq-mailbox.h
> +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
> @@ -60,6 +60,7 @@ enum cmdq_code {
>   	CMDQ_CODE_JUMP = 0x10,
>   	CMDQ_CODE_WFE = 0x20,
>   	CMDQ_CODE_EOC = 0x40,
> +	CMDQ_CODE_WRITE_S = 0x90,
>   	CMDQ_CODE_LOGIC = 0xa0,
>   };
>   
> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> index 2249ecaf77e4..9b0c57a0063d 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -12,6 +12,8 @@
>   #include <linux/timer.h>
>   
>   #define CMDQ_NO_TIMEOUT		0xffffffffu
> +#define CMDQ_ADDR_HIGH(addr)	((u32)(((addr) >> 16) & GENMASK(31, 0)))
> +#define CMDQ_ADDR_LOW(addr)	((u16)(addr) | BIT(1))
>   
>   struct cmdq_pkt;
>   
> @@ -103,6 +105,23 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
>   			u16 offset, u32 value, u32 mask);
>   
>   /**
> + * cmdq_pkt_write_s() - append write_s 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
> + *
> + * 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(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> +		     u16 addr_low, u16 src_reg_idx);
> +
> +/**
>    * 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"
>