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    Subject[PATCH v2 13/14] soc: mediatek: cmdq: add wait no clear event function
    Date
    Add wait no clear event function in cmdq helper functions to wait specific
    event without clear to 0 after receive it.

    Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>
    ---
    drivers/soc/mediatek/mtk-cmdq-helper.c | 15 +++++++++++++++
    include/linux/soc/mediatek/mtk-cmdq.h | 10 ++++++++++
    2 files changed, 25 insertions(+)

    diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
    index 10a9b4481e58..6f270fadfb50 100644
    --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
    +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
    @@ -330,6 +330,21 @@ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
    }
    EXPORT_SYMBOL(cmdq_pkt_wfe);

    +int cmdq_pkt_wait_no_clear(struct cmdq_pkt *pkt, u16 event)
    +{
    + struct cmdq_instruction inst = { {0} };
    +
    + if (event >= CMDQ_MAX_EVENT)
    + return -EINVAL;
    +
    + inst.op = CMDQ_CODE_WFE;
    + inst.value = CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE;
    + inst.event = event;
    +
    + return cmdq_pkt_append_command(pkt, inst);
    +}
    +EXPORT_SYMBOL(cmdq_pkt_wait_no_clear);
    +
    int cmdq_pkt_clear_event(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 d15d8c941992..40bc61ad8d31 100644
    --- a/include/linux/soc/mediatek/mtk-cmdq.h
    +++ b/include/linux/soc/mediatek/mtk-cmdq.h
    @@ -149,6 +149,16 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, dma_addr_t addr,
    */
    int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event);

    +/**
    + * cmdq_pkt_wait_no_clear() - Append wait for event command to the CMDQ packet,
    + * without update event to 0 after receive it.
    + * @pkt: the CMDQ packet
    + * @event: the desired event type to wait
    + *
    + * Return: 0 for success; else the error code is returned
    + */
    +int cmdq_pkt_wait_no_clear(struct cmdq_pkt *pkt, u16 event);
    +
    /**
    * cmdq_pkt_clear_event() - append clear event command to the CMDQ packet
    * @pkt: the CMDQ packet
    --
    2.18.0
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