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slimbus: ngd: reset dma setup during runtime pm 

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: 917809e228 ("slimbus: ngd: Add qcom SLIMBus NGD driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210809082428.11236-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Srinivas Kandagatla 2021-08-09 09:24:28 +01:00 committed by Greg Kroah-Hartman
parent c0e38eaa8d
commit d77772538f
1 changed files with 4 additions and 1 deletions
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5
drivers/slimbus/qcom-ngd-ctrl.c
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@ -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;