[PATCH v2 3/5] staging: media: starfive: Extract the ISP stream on as a helper function

[Changhuang Liang <changhuang.liang@xxxxxxxxxxxxxxxx>]

Extract the ISP stream on as a helper function and open it, Let the
other files can use it.

Signed-off-by: Changhuang Liang <changhuang.liang@xxxxxxxxxxxxxxxx>
---
 .../staging/media/starfive/camss/stf-isp.c    | 27 ++++++++++++-------
 .../staging/media/starfive/camss/stf-isp.h    |  2 ++
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/media/starfive/camss/stf-isp.c b/drivers/staging/media/starfive/camss/stf-isp.c
index 4e6e26736852..8c6388edf049 100644
--- a/drivers/staging/media/starfive/camss/stf-isp.c
+++ b/drivers/staging/media/starfive/camss/stf-isp.c
@@ -55,23 +55,30 @@ int stf_isp_init(struct stfcamss *stfcamss)
 	return 0;
 }
 
-static int isp_set_stream(struct v4l2_subdev *sd, int enable)
+void stf_isp_stream_on(struct stf_isp_dev *isp_dev,
+		       struct v4l2_subdev_state *sd_state)
 {
-	struct stf_isp_dev *isp_dev = v4l2_get_subdevdata(sd);
-	struct v4l2_subdev_state *sd_state;
 	struct v4l2_mbus_framefmt *fmt;
 	struct v4l2_rect *crop;
 
-	sd_state = v4l2_subdev_lock_and_get_active_state(sd);
 	fmt = v4l2_subdev_state_get_format(sd_state, STF_ISP_PAD_SINK);
 	crop = v4l2_subdev_state_get_crop(sd_state, STF_ISP_PAD_SRC);
 
-	if (enable) {
-		stf_isp_reset(isp_dev);
-		stf_isp_init_cfg(isp_dev);
-		stf_isp_settings(isp_dev, crop, fmt->code);
-		stf_isp_stream_set(isp_dev);
-	}
+	stf_isp_reset(isp_dev);
+	stf_isp_init_cfg(isp_dev);
+	stf_isp_settings(isp_dev, crop, fmt->code);
+	stf_isp_stream_set(isp_dev);
+}
+
+static int isp_set_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct stf_isp_dev *isp_dev = v4l2_get_subdevdata(sd);
+	struct v4l2_subdev_state *sd_state;
+
+	sd_state = v4l2_subdev_lock_and_get_active_state(sd);
+
+	if (enable)
+		stf_isp_stream_on(isp_dev, sd_state);
 
 	v4l2_subdev_call(isp_dev->source_subdev, video, s_stream, enable);
 
diff --git a/drivers/staging/media/starfive/camss/stf-isp.h b/drivers/staging/media/starfive/camss/stf-isp.h
index 955cbb048363..1a3e8cf7859c 100644
--- a/drivers/staging/media/starfive/camss/stf-isp.h
+++ b/drivers/staging/media/starfive/camss/stf-isp.h
@@ -421,6 +421,8 @@ void stf_isp_init_cfg(struct stf_isp_dev *isp_dev);
 void stf_isp_settings(struct stf_isp_dev *isp_dev,
 		      struct v4l2_rect *crop, u32 mcode);
 void stf_isp_stream_set(struct stf_isp_dev *isp_dev);
+void stf_isp_stream_on(struct stf_isp_dev *isp_dev,
+		       struct v4l2_subdev_state *sd_state);
 int stf_isp_init(struct stfcamss *stfcamss);
 int stf_isp_register(struct stf_isp_dev *isp_dev, struct v4l2_device *v4l2_dev);
 int stf_isp_unregister(struct stf_isp_dev *isp_dev);
-- 
2.25.1