Hi, Dennis:
On Fri, 2020-02-28 at 21:44 +0800, Dennis YC Hsieh wrote:
> Add read_s function in cmdq helper functions which support read value from
> register or dma physical address into gce internal register.
>
Reviewed-by: CK Hu <ck.hu@xxxxxxxxxxxx>
> Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@xxxxxxxxxxxx>
> ---
> drivers/soc/mediatek/mtk-cmdq-helper.c | 15 +++++++++++++++
> include/linux/mailbox/mtk-cmdq-mailbox.h | 1 +
> include/linux/soc/mediatek/mtk-cmdq.h | 13 +++++++++++++
> 3 files changed, 29 insertions(+)
>
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 68b42c935fe6..428f99288ca6 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -226,6 +226,21 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
> }
> EXPORT_SYMBOL(cmdq_pkt_write_mask);
>
> +int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
> + u16 reg_idx)
> +{
> + struct cmdq_instruction inst = { {0} };
> +
> + inst.op = CMDQ_CODE_READ_S;
> + inst.dst_t = CMDQ_REG_TYPE;
> + inst.sop = high_addr_reg_idx;
> + inst.reg_dst = reg_idx;
> + inst.src_reg = addr_low;
> +
> + return cmdq_pkt_append_command(pkt, inst);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_read_s);
> +
> int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> u16 addr_low, u16 src_reg_idx, u32 mask)
> {
> diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
> index 8ef87e1bd03b..3f6bc0dfd5da 100644
> --- a/include/linux/mailbox/mtk-cmdq-mailbox.h
> +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
> @@ -59,6 +59,7 @@ enum cmdq_code {
> CMDQ_CODE_JUMP = 0x10,
> CMDQ_CODE_WFE = 0x20,
> CMDQ_CODE_EOC = 0x40,
> + CMDQ_CODE_READ_S = 0x80,
> 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 c72d826d8934..01b4184af310 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -104,6 +104,19 @@ int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value);
> int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
> u16 offset, u32 value, u32 mask);
>
> +/*
> + * cmdq_pkt_read_s() - append read_s command to the CMDQ packet
> + * @pkt: the CMDQ packet
> + * @high_addr_reg_idx: internal regisger ID which contains high address of pa
> + * @addr_low: low address of pa
> + * @addr: the physical address of register or dma to read
> + * @reg_idx: the CMDQ internal register ID to cache read data
> + *
> + * Return: 0 for success; else the error code is returned
> + */
> +int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
> + u16 reg_idx);
> +
> /**
> * cmdq_pkt_write_s() - append write_s command to the CMDQ packet
> * @pkt: the CMDQ packet
