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soc: mediatek: cmdq: add read_s function

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Add read_s function in cmdq helper functions which support read value from
register or dma physical address into gce internal register.

Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@mediatek.com>
Link: https://lore.kernel.org/r/1594136714-11650-5-git-send-email-dennis-yc.hsieh@mediatek.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Dennis YC Hsieh
2020-07-07 23:45:09 +08:00
committed by Matthias Brugger
parent 11c7842d41
commit d3b04aab06
3 changed files with 28 additions and 0 deletions
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12
include/linux/soc/mediatek/mtk-cmdq.h
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@@ -104,6 +104,18 @@ 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 register ID which contains high address of pa
* @addr_low: low address of pa
* @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