[RESEND, PATCH 5/5] mailbox: mtk-cmdq: Add support runtime get and set GCE event

[Jason-JH.Lin <jason-jh.lin@mediatek.com>]

ISP drivers need to get and set GCE event in their runtime contorl flow.
So add these functions to support get and set GCE by CPU.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 drivers/mailbox/mtk-cmdq-mailbox.c       | 37 ++++++++++++++++++++++++
 include/linux/mailbox/mtk-cmdq-mailbox.h |  2 ++
 2 files changed, 39 insertions(+)

diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index ead2200f39ba..d7c08249c898 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -25,7 +25,11 @@
 #define CMDQ_GCE_NUM_MAX		(2)
 
 #define CMDQ_CURR_IRQ_STATUS		0x10
+#define CMDQ_SYNC_TOKEN_ID		0x60
+#define CMDQ_SYNC_TOKEN_VALUE		0x64
+#define CMDQ_TOKEN_ID_MASK			GENMASK(9, 0)
 #define CMDQ_SYNC_TOKEN_UPDATE		0x68
+#define CMDQ_TOKEN_UPDATE_VALUE			BIT(16)
 #define CMDQ_THR_SLOT_CYCLES		0x30
 #define CMDQ_THR_BASE			0x100
 #define CMDQ_THR_SIZE			0x80
@@ -83,6 +87,7 @@ struct cmdq {
 	struct cmdq_thread	*thread;
 	struct clk_bulk_data	clocks[CMDQ_GCE_NUM_MAX];
 	bool			suspended;
+	spinlock_t		event_lock; /* lock for gce event */
 };
 
 struct gce_plat {
@@ -113,6 +118,38 @@ u8 cmdq_get_shift_pa(struct mbox_chan *chan)
 }
 EXPORT_SYMBOL(cmdq_get_shift_pa);
 
+void cmdq_set_event(void *chan, u16 event_id)
+{
+	struct cmdq *cmdq = container_of(((struct mbox_chan *)chan)->mbox,
+		typeof(*cmdq), mbox);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cmdq->event_lock, flags);
+
+	writel(CMDQ_TOKEN_UPDATE_VALUE | event_id, cmdq->base + CMDQ_SYNC_TOKEN_UPDATE);
+
+	spin_unlock_irqrestore(&cmdq->event_lock, flags);
+}
+EXPORT_SYMBOL(cmdq_set_event);
+
+u32 cmdq_get_event(void *chan, u16 event_id)
+{
+	struct cmdq *cmdq = container_of(((struct mbox_chan *)chan)->mbox,
+		typeof(*cmdq), mbox);
+	unsigned long flags;
+	u32 value = 0;
+
+	spin_lock_irqsave(&cmdq->event_lock, flags);
+
+	writel(CMDQ_TOKEN_ID_MASK & event_id, cmdq->base + CMDQ_SYNC_TOKEN_ID);
+	value = readl(cmdq->base + CMDQ_SYNC_TOKEN_VALUE);
+
+	spin_unlock_irqrestore(&cmdq->event_lock, flags);
+
+	return value;
+}
+EXPORT_SYMBOL(cmdq_get_event);
+
 static int cmdq_thread_suspend(struct cmdq *cmdq, struct cmdq_thread *thread)
 {
 	u32 status;
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index a8f0070c7aa9..f05cabd230da 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -79,5 +79,7 @@ struct cmdq_pkt {
 };
 
 u8 cmdq_get_shift_pa(struct mbox_chan *chan);
+void cmdq_set_event(void *chan, u16 event_id);
+u32 cmdq_get_event(void *chan, u16 event_id);
 
 #endif /* __MTK_CMDQ_MAILBOX_H__ */
-- 
2.18.0