[RFC PATCH v6 05/10] media: tegra-video: Separate CSI stream enable and disable implementations

Sowjanya Komatineni
2020-07-31T09:03:37Z

This patch separates implementation of CSI stream enable and disable
into separate functions for readability.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
drivers/staging/media/tegra-video/csi.c | 51 ++++++++++++++++++++++-----------
1 file changed, 35 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/media/tegra-video/csi.c b/drivers/staging/media/tegra-video/csi.c
index fb667df..cfe6187 100644
--- a/drivers/staging/media/tegra-video/csi.c
+++ b/drivers/staging/media/tegra-video/csi.c
@@ -232,34 +232,53 @@ static int tegra_csi_g_frame_interval(struct v4l2_subdev *subdev,
return 0;
}

-static int tegra_csi_s_stream(struct v4l2_subdev *subdev, int enable)
+static int tegra_csi_enable_stream(struct v4l2_subdev *subdev)
{
struct tegra_vi_channel *chan = v4l2_get_subdev_hostdata(subdev);
struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
struct tegra_csi *csi = csi_chan->csi;
- int ret = 0;
+ int ret;
+
+ ret = pm_runtime_get_sync(csi->dev);
+ if (ret < 0) {
+ dev_err(csi->dev, "failed to get runtime PM: %d\n", ret);
+ pm_runtime_put_noidle(csi->dev);
+ return ret;
+ }

csi_chan->pg_mode = chan->pg_mode;
- if (enable) {
- ret = pm_runtime_get_sync(csi->dev);
- if (ret < 0) {
- dev_err(csi->dev,
- "failed to get runtime PM: %d\n", ret);
- pm_runtime_put_noidle(csi->dev);
- return ret;
- }
+ ret = csi->ops->csi_start_streaming(csi_chan);
+ if (ret < 0)
+ goto rpm_put;

- ret = csi->ops->csi_start_streaming(csi_chan);
- if (ret < 0)
- goto rpm_put;
+ return 0;

- return 0;
- }
+rpm_put:
+ pm_runtime_put(csi->dev);
+ return ret;
+}
+
+static int tegra_csi_disable_stream(struct v4l2_subdev *subdev)
+{
+ struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
+ struct tegra_csi *csi = csi_chan->csi;

csi->ops->csi_stop_streaming(csi_chan);

-rpm_put:
pm_runtime_put(csi->dev);
+
+ return 0;
+}
+
+static int tegra_csi_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+ int ret;
+
+ if (enable)
+ ret = tegra_csi_enable_stream(subdev);
+ else
+ ret = tegra_csi_disable_stream(subdev);
+
return ret;
}

--
2.7.4