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    Subject[PATCH v3 09/12] soc: mediatek: cmdq: add polling function
    Date
    add polling function in cmdq helper functions

    Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
    ---
    drivers/soc/mediatek/mtk-cmdq-helper.c | 30 ++++++++++++++++++++++++++++++
    include/linux/mailbox/mtk-cmdq-mailbox.h | 1 +
    include/linux/soc/mediatek/mtk-cmdq.h | 15 +++++++++++++++
    3 files changed, 46 insertions(+)

    diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
    index d3873ab..80856b8 100644
    --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
    +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
    @@ -231,6 +231,36 @@ int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
    }
    EXPORT_SYMBOL(cmdq_pkt_clear_event);

    +int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
    + u16 offset, u32 value, u32 mask)
    +{
    + int err;
    +
    + if (mask != 0xffffffff) {
    + err = cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(~mask),
    + CMDQ_GET_ARG_B(~mask),
    + CMDQ_IMMEDIATE_VALUE,
    + CMDQ_IMMEDIATE_VALUE,
    + CMDQ_IMMEDIATE_VALUE,
    + CMDQ_IMMEDIATE_VALUE,
    + CMDQ_IMMEDIATE_VALUE,
    + CMDQ_CODE_MASK);
    +
    + if (err != 0)
    + return err;
    + }
    + offset = offset | 0x1;
    +
    + return cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(value),
    + CMDQ_GET_ARG_B(value),
    + offset, subsys,
    + CMDQ_IMMEDIATE_VALUE,
    + CMDQ_IMMEDIATE_VALUE,
    + CMDQ_IMMEDIATE_VALUE,
    + CMDQ_CODE_POLL);
    +}
    +EXPORT_SYMBOL(cmdq_pkt_poll);
    +
    static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
    {
    int err;
    diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
    index f21801d..1dfd5ed 100644
    --- a/include/linux/mailbox/mtk-cmdq-mailbox.h
    +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
    @@ -46,6 +46,7 @@
    enum cmdq_code {
    CMDQ_CODE_MASK = 0x02,
    CMDQ_CODE_WRITE = 0x04,
    + CMDQ_CODE_POLL = 0x08,
    CMDQ_CODE_JUMP = 0x10,
    CMDQ_CODE_WFE = 0x20,
    CMDQ_CODE_EOC = 0x40,
    diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
    index 52f69c8..0651a0b 100644
    --- a/include/linux/soc/mediatek/mtk-cmdq.h
    +++ b/include/linux/soc/mediatek/mtk-cmdq.h
    @@ -100,6 +100,21 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset,
    int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event);

    /**
    + * cmdq_pkt_poll() - Append polling command to the CMDQ packet, ask GCE to
    + * execute an instruction that wait for a specified hardware
    + * register to check for the value. All GCE hardware
    + * threads will be blocked by this instruction.
    + * @pkt: the CMDQ packet
    + * @subsys: the CMDQ sub system code
    + * @offset: register offset from CMDQ sub system
    + * @value: the specified target register value
    + * @mask: the specified target register mask
    + *
    + * Return: 0 for success; else the error code is returned
    + */
    +int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
    + u16 offset, u32 value, u32 mask);
    +/**
    * cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ
    * packet and call back at the end of done packet
    * @pkt: the CMDQ packet
    --
    1.9.1
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