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From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To: srini@kernel.org
Cc: linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org,
	Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Subject: [PATCH 4/4] slimbus: ngd: reset dma setup during runtime pm
Date: Fri, 16 Jul 2021 11:21:23 +0100	[thread overview]
Message-ID: <20210716102123.26861-5-srinivas.kandagatla@linaro.org> (raw)
In-Reply-To: <20210716102123.26861-1-srinivas.kandagatla@linaro.org>

During suspend/resume NGD remote instance is power cycled along
with remotely controlled bam dma engine.
So Reset the dma configuration during this suspend resume path
so that we are not dealing with any stale dma setup.

Without this transactions timeout after first suspend resume path.

Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 drivers/slimbus/qcom-ngd-ctrl.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
index f3ee8e036372..7040293c2ee8 100644
--- a/drivers/slimbus/qcom-ngd-ctrl.c
+++ b/drivers/slimbus/qcom-ngd-ctrl.c
@@ -1080,7 +1080,8 @@ static void qcom_slim_ngd_setup(struct qcom_slim_ngd_ctrl *ctrl)
 {
 	u32 cfg = readl_relaxed(ctrl->ngd->base);
 
-	if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN)
+	if (ctrl->state == QCOM_SLIM_NGD_CTRL_DOWN ||
+		ctrl->state == QCOM_SLIM_NGD_CTRL_ASLEEP)
 		qcom_slim_ngd_init_dma(ctrl);
 
 	/* By default enable message queues */
@@ -1131,6 +1132,7 @@ static int qcom_slim_ngd_power_up(struct qcom_slim_ngd_ctrl *ctrl)
 			dev_info(ctrl->dev, "Subsys restart: ADSP active framer\n");
 			return 0;
 		}
+		qcom_slim_ngd_setup(ctrl);
 		return 0;
 	}
 
@@ -1618,6 +1620,7 @@ static int __maybe_unused qcom_slim_ngd_runtime_suspend(struct device *dev)
 	struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(dev);
 	int ret = 0;
 
+	qcom_slim_ngd_exit_dma(ctrl);
 	if (!ctrl->qmi.handle)
 		return 0;
 
-- 
2.21.0


  parent reply	other threads:[~2021-07-16 10:22 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-16 10:21 [PATCH 0/4] slimbus: ngd: fix runtime pm issues Srinivas Kandagatla
2021-07-16 10:21 ` [PATCH 1/4] slimbus: messaging: start transaction ids from 1 instead of zero Srinivas Kandagatla
2021-07-16 10:21 ` [PATCH 2/4] slimbus: messaging: check for valid transaction id Srinivas Kandagatla
2021-07-16 10:21 ` [PATCH 3/4] slimbus: ngd: set correct device for pm Srinivas Kandagatla
2021-07-16 10:21 ` Srinivas Kandagatla [this message]
2021-08-06  9:16 [PATCH 0/4] slimbus: patches (set 1) for 5.15 Srinivas Kandagatla
2021-08-06  9:16 ` [PATCH 4/4] slimbus: ngd: reset dma setup during runtime pm Srinivas Kandagatla

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