[PATCH v8 20/38] media: ccs: Track streaming state

[Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>]

With enable_streams and disable_streams, the driver for a device where
streams are not independently started and stopped needs to maintain state
information on streams that have been requested to be started. Do that
now.

In the future, a helper function in the framework is a desirable way to do
this instead.

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
 drivers/media/i2c/ccs/ccs-core.c | 13 ++++++++++---
 drivers/media/i2c/ccs/ccs.h      |  2 +-
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c
index 9e70946653e9..0cd8ee957655 100644
--- a/drivers/media/i2c/ccs/ccs-core.c
+++ b/drivers/media/i2c/ccs/ccs-core.c
@@ -1766,6 +1766,11 @@ static int ccs_enable_streams(struct v4l2_subdev *subdev,
 	if (pad != CCS_PAD_SRC)
 		return -EINVAL;
 
+	if (sensor->streaming) {
+		sensor->streaming |= streams_mask;
+		return 0;
+	}
+
 	rval = ccs_pm_get_init(sensor);
 	if (rval)
 		return rval;
@@ -1887,7 +1892,7 @@ static int ccs_enable_streams(struct v4l2_subdev *subdev,
 
 	rval = ccs_write(sensor, MODE_SELECT, CCS_MODE_SELECT_STREAMING);
 
-	sensor->streaming = true;
+	sensor->streaming |= streams_mask;
 
 	return 0;
 
@@ -1909,6 +1914,10 @@ static int ccs_disable_streams(struct v4l2_subdev *subdev,
 	if (pad != CCS_PAD_SRC)
 		return -EINVAL;
 
+	sensor->streaming &= ~streams_mask;
+	if (sensor->streaming)
+		return 0;
+
 	rval = ccs_write(sensor, MODE_SELECT, CCS_MODE_SELECT_SOFTWARE_STANDBY);
 	if (rval)
 		return rval;
@@ -1917,7 +1926,6 @@ static int ccs_disable_streams(struct v4l2_subdev *subdev,
 	if (rval)
 		dev_err(&client->dev, "post_streamoff quirks failed\n");
 
-	sensor->streaming = false;
 	pm_runtime_mark_last_busy(&client->dev);
 	pm_runtime_put_autosuspend(&client->dev);
 
@@ -3525,7 +3533,6 @@ static int ccs_probe(struct i2c_client *client)
 		goto out_cleanup;
 	}
 
-	sensor->streaming = false;
 	sensor->dev_init_done = true;
 	sensor->handler_setup_needed = true;
 
diff --git a/drivers/media/i2c/ccs/ccs.h b/drivers/media/i2c/ccs/ccs.h
index 096573845a10..4725e6eca8d0 100644
--- a/drivers/media/i2c/ccs/ccs.h
+++ b/drivers/media/i2c/ccs/ccs.h
@@ -236,7 +236,7 @@ struct ccs_sensor {
 	u16 image_start; /* image data start line */
 	u16 visible_pixel_start; /* start pixel of the visible image */
 
-	bool streaming;
+	u8 streaming;
 	bool dev_init_done;
 	bool handler_setup_needed;
 	u8 compressed_min_bpp;
-- 
2.39.2