[RFC PATCH v6 05/10] media: tegra-video: Separate CSI stream enable and disable implementations
From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: 2020-07-31 09:03:37
Also in:
linux-i2c, linux-media, linux-tegra, lkml
Subsystem:
media input infrastructure (v4l/dvb), staging subsystem, tegra video driver, the rest · Maintainers:
Mauro Carvalho Chehab, Greg Kroah-Hartman, Thierry Reding, Jonathan Hunter, Sowjanya Komatineni, Luca Ceresoli, Linus Torvalds
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