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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2021-08-09 09:24:28 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-08-13 10:22:30 +0200
commitd77772538f00b7265deace6e77e555ee18365ad0 (patch)
treecbd4c99ee5e970c704128fce076eacb2f0c8d6bd /drivers/slimbus
parentc0e38eaa8d5102c138e4f16658ea762417d42a8f (diff)
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: 917809e2280b ("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>
Diffstat (limited to 'drivers/slimbus')
-rw-r--r--drivers/slimbus/qcom-ngd-ctrl.c5
1 files changed, 4 insertions, 1 deletions
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;