[PATCH v2 1/2] media: ipu3-cio2: Toggle sensor streaming in pm runtime ops

[Daniel Scally]

The .suspend() and .resume() runtime_pm operations for the ipu3-cio2
driver currently do not handle the sensor's stream. Setting .s_stream() on
or off for the sensor subdev means that sensors will pause and resume the
stream at the appropriate time even if their drivers don't implement those
operations.

Signed-off-by: Daniel Scally <djrsca...@gmail.com>
---
Changes in v2:

        Patch introduced

 drivers/media/pci/intel/ipu3/ipu3-cio2-main.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c 
b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c
index db59b19a6236..0a970ddeb281 100644
--- a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c
+++ b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c
@@ -1981,12 +1981,19 @@ static int __maybe_unused cio2_suspend(struct device 
*dev)
        struct pci_dev *pci_dev = to_pci_dev(dev);
        struct cio2_device *cio2 = pci_get_drvdata(pci_dev);
        struct cio2_queue *q = cio2->cur_queue;
+       int r;
 
        dev_dbg(dev, "cio2 suspend\n");
        if (!cio2->streaming)
                return 0;
 
        /* Stop stream */
+       r = v4l2_subdev_call(q->sensor, video, s_stream, 0);
+       if (r) {
+               dev_err(dev, "failed to stop sensor streaming\n");
+               return r;
+       }
+
        cio2_hw_exit(cio2, q);
        synchronize_irq(pci_dev->irq);
 
@@ -2021,8 +2028,14 @@ static int __maybe_unused cio2_resume(struct device *dev)
        }
 
        r = cio2_hw_init(cio2, q);
-       if (r)
+       if (r) {
                dev_err(dev, "fail to init cio2 hw\n");
+               return r;
+       }
+
+       r = v4l2_subdev_call(q->sensor, video, s_stream, 1);
+       if (r)
+               dev_err(dev, "fail to start sensor streaming\n");
 
        return r;
 }
-- 
2.25.1