linux-kernel - [PATCH 04/15] mailbox: mtk-cmdq: Support GCE thread loop

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Message-ID: <20230823151332.28811-5-shawn.sung@mediatek.com>
Date:   Wed, 23 Aug 2023 23:13:21 +0800
From:   Hsiao Chien Sung <shawn.sung@...iatek.com>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Jassi Brar <jassisinghbrar@...il.com>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Singo Chang <singo.chang@...iatek.com>,
        Nancy Lin <nancy.lin@...iatek.com>,
        Jason-JH Lin <jason-jh.lin@...iatek.com>,
        Hsiao Chien Sung <shawn.sung@...iatek.com>
Subject: [PATCH 04/15] mailbox: mtk-cmdq: Support GCE thread loop

Do not disable CMDQ thread if it is a loop.

Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
---
 drivers/mailbox/mtk-cmdq-mailbox.c       | 5 +++++
 include/linux/mailbox/mtk-cmdq-mailbox.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index b18d47ea13a0..88ff39a28415 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -264,6 +264,11 @@ static void cmdq_thread_irq_handler(struct cmdq *cmdq,
 
 	curr_pa = readl(thread->base + CMDQ_THR_CURR_ADDR) << cmdq->pdata->shift;
 
+	task = list_first_entry_or_null(&thread->task_busy_list,
+					struct cmdq_task, list_entry);
+	if (task && task->pkt->loop)
+		return;
+
 	list_for_each_entry_safe(task, tmp, &thread->task_busy_list,
 				 list_entry) {
 		task_end_pa = task->pa_base + task->pkt->cmd_buf_size;
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index a8f0070c7aa9..f78a08e7c6ed 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -76,6 +76,7 @@ struct cmdq_pkt {
 	size_t			cmd_buf_size; /* command occupied size */
 	size_t			buf_size; /* real buffer size */
 	void			*cl;
+	bool			loop;
 };
 
 u8 cmdq_get_shift_pa(struct mbox_chan *chan);
-- 
2.18.0