Hi CK,

Thanks for you comment.

On Fri, 2020-02-28 at 22:32 +0800, CK Hu wrote:

Hi, Dennis:

On Fri, 2020-02-28 at 21:44 +0800, Dennis YC Hsieh wrote:

quoted

Add clear parameter to let client decide if
event should be clear to 0 after GCE receive it.

Signed-off-by: Dennis YC Hsieh <redacted>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c   | 5 +++--
 include/linux/mailbox/mtk-cmdq-mailbox.h | 3 +--
 include/linux/soc/mediatek/mtk-cmdq.h    | 5 +++--
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index bbc68a7c81e9..406e1d34d234 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c

@@ -295,15 +295,16 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
 }
 EXPORT_SYMBOL(cmdq_pkt_write_s_value);
 
-int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
+int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear)
 {
 	struct cmdq_instruction inst = { {0} };
+	u32 clear_option = clear ? CMDQ_WFE_UPDATE : 0;
 
 	if (event >= CMDQ_MAX_EVENT)
 		return -EINVAL;
 
 	inst.op = CMDQ_CODE_WFE;
-	inst.value = CMDQ_WFE_OPTION;
+	inst.value = CMDQ_WFE_OPTION | clear_option;
 	inst.event = event;
 
 	return cmdq_pkt_append_command(pkt, inst);

diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index 3f6bc0dfd5da..42d2a30e6a70 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h

@@ -27,8 +27,7 @@
  * bit 16-27: update value
  * bit 31: 1 - update, 0 - no update
  */
-#define CMDQ_WFE_OPTION			(CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | \
-					CMDQ_WFE_WAIT_VALUE)
+#define CMDQ_WFE_OPTION			(CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE)
 
 /** cmdq event maximum */
 #define CMDQ_MAX_EVENT			0x3ff

diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 1a6c56f3bec1..d63749440697 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h

@@ -152,11 +152,12 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_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"
+ * @event:	the desired event type to wait
+ * @clear:	clear event or not after event arrive
  *
  * Return: 0 for success; else the error code is returned
  */
-int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event);
+int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear);

I think you should modify client driver [1] as well in this patch.
Change it to

cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);

[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/mediatek/mtk_drm_crtc.c?h=v5.6-rc3#n491

Regards,
CK

ok, will do


Regards,
Dennis

quoted

 
 /**
  * cmdq_pkt_clear_event() - append clear event command to the CMDQ packet