From 6058f11870b8e6d4f5cc7b591097c00bf69a000d Mon Sep 17 00:00:00 2001 From: Bibby Hsieh Date: Thu, 29 Aug 2019 09:48:12 +0800 Subject: mailbox: mediatek: cmdq: clear the event in cmdq initial flow GCE hardware stored event information in own internal sysram, if the initial value in those sysram is not zero value it will cause a situation that gce can wait the event immediately after client ask gce to wait event but not really trigger the corresponding hardware. In order to make sure that the wait event function is exactly correct, we need to clear the sysram value in cmdq initial flow. Fixes: 623a6143a845 ("mailbox: mediatek: Add Mediatek CMDQ driver") Signed-off-by: Bibby Hsieh Reviewed-by: CK Hu Reviewed-by: Matthias Brugger Signed-off-by: Jassi Brar --- drivers/mailbox/mtk-cmdq-mailbox.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/mailbox') diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 69daaadc3a5f..9a6ce9f5a7db 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -21,6 +21,7 @@ #define CMDQ_NUM_CMD(t) (t->cmd_buf_size / CMDQ_INST_SIZE) #define CMDQ_CURR_IRQ_STATUS 0x10 +#define CMDQ_SYNC_TOKEN_UPDATE 0x68 #define CMDQ_THR_SLOT_CYCLES 0x30 #define CMDQ_THR_BASE 0x100 #define CMDQ_THR_SIZE 0x80 @@ -104,8 +105,12 @@ static void cmdq_thread_resume(struct cmdq_thread *thread) static void cmdq_init(struct cmdq *cmdq) { + int i; + WARN_ON(clk_enable(cmdq->clock) < 0); writel(CMDQ_THR_ACTIVE_SLOT_CYCLES, cmdq->base + CMDQ_THR_SLOT_CYCLES); + for (i = 0; i <= CMDQ_MAX_EVENT; i++) + writel(i, cmdq->base + CMDQ_SYNC_TOKEN_UPDATE); clk_disable(cmdq->clock); } -- cgit v1.2.3