Add media controller support to dcmi in order
to walk within remote subdevices pipeline.
Signed-off-by: Hugues Fruchet <hugues.fruc...@st.com>
---
drivers/media/platform/Kconfig | 2 +-
drivers/media/platform/stm32/stm32-dcmi.c | 52 ++++++++++++++++++++++++-------
2 files changed, 41 insertions(+), 13 deletions(-)
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index 8a19654..de7e21f 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -121,7 +121,7 @@ config VIDEO_S3C_CAMIF
config VIDEO_STM32_DCMI
tristate "STM32 Digital Camera Memory Interface (DCMI) support"
- depends on VIDEO_V4L2 && OF
+ depends on VIDEO_V4L2 && OF && MEDIA_CONTROLLER
depends on ARCH_STM32 || COMPILE_TEST
select VIDEOBUF2_DMA_CONTIG
select V4L2_FWNODE
diff --git a/drivers/media/platform/stm32/stm32-dcmi.c
b/drivers/media/platform/stm32/stm32-dcmi.c
index 18acecf..302c40e 100644
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -169,6 +169,9 @@ struct stm32_dcmi {
/* Ensure DMA operations atomicity */
struct mutex dma_lock;
+
+ struct media_device mdev;
+ struct media_pad vid_cap_pad;
};
static inline struct stm32_dcmi *notifier_to_dcmi(struct v4l2_async_notifier
*n)
@@ -1559,14 +1562,6 @@ static int dcmi_graph_notify_complete(struct
v4l2_async_notifier *notifier)
return ret;
}
- ret = video_register_device(dcmi->vdev, VFL_TYPE_GRABBER, -1);
- if (ret) {
- dev_err(dcmi->dev, "Failed to register video device\n");
- return ret;
- }
-
- dev_dbg(dcmi->dev, "Device registered as %s\n",
- video_device_node_name(dcmi->vdev));
return 0;
}
@@ -1759,10 +1754,19 @@ static int dcmi_probe(struct platform_device *pdev)
q = &dcmi->queue;
+ dcmi->v4l2_dev.mdev = &dcmi->mdev;
+
+ /* Initialize media device */
+ strscpy(dcmi->mdev.model, DRV_NAME, sizeof(dcmi->mdev.model));
+ snprintf(dcmi->mdev.bus_info, sizeof(dcmi->mdev.bus_info),
+ "platform:%s", DRV_NAME);
+ dcmi->mdev.dev = &pdev->dev;
+ media_device_init(&dcmi->mdev);
+
/* Initialize the top-level structure */
ret = v4l2_device_register(&pdev->dev, &dcmi->v4l2_dev);
if (ret)
- goto err_dma_release;
+ goto err_media_device_cleanup;
dcmi->vdev = video_device_alloc();
if (!dcmi->vdev) {
@@ -1782,6 +1786,25 @@ static int dcmi_probe(struct platform_device *pdev)
V4L2_CAP_READWRITE;
video_set_drvdata(dcmi->vdev, dcmi);
+ /* Media entity pads */
+ dcmi->vid_cap_pad.flags = MEDIA_PAD_FL_SINK;
+ ret = media_entity_pads_init(&dcmi->vdev->entity,
+ 1, &dcmi->vid_cap_pad);
+ if (ret) {
+ dev_err(dcmi->dev, "Failed to init media entity pad\n");
+ goto err_device_release;
+ }
+ dcmi->vdev->entity.flags |= MEDIA_ENT_FL_DEFAULT;
+
+ ret = video_register_device(dcmi->vdev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ dev_err(dcmi->dev, "Failed to register video device\n");
+ goto err_media_entity_cleanup;
+ }
+
+ dev_dbg(dcmi->dev, "Device registered as %s\n",
+ video_device_node_name(dcmi->vdev));
+
/* Buffer queue */
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
@@ -1797,12 +1820,12 @@ static int dcmi_probe(struct platform_device *pdev)
ret = vb2_queue_init(q);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to initialize vb2 queue\n");
- goto err_device_release;
+ goto err_media_entity_cleanup;
}
ret = dcmi_graph_init(dcmi);
if (ret < 0)
- goto err_device_release;
+ goto err_media_entity_cleanup;
/* Reset device */
ret = reset_control_assert(dcmi->rstc);
@@ -1829,11 +1852,14 @@ static int dcmi_probe(struct platform_device *pdev)
err_cleanup:
v4l2_async_notifier_cleanup(&dcmi->notifier);
+err_media_entity_cleanup:
+ media_entity_cleanup(&dcmi->vdev->entity);
err_device_release:
video_device_release(dcmi->vdev);
err_device_unregister:
v4l2_device_unregister(&dcmi->v4l2_dev);
-err_dma_release:
+err_media_device_cleanup:
+ media_device_cleanup(&dcmi->mdev);
dma_release_channel(dcmi->dma_chan);
return ret;
@@ -1847,7 +1873,9 @@ static int dcmi_remove(struct platform_device *pdev)
v4l2_async_notifier_unregister(&dcmi->notifier);
v4l2_async_notifier_cleanup(&dcmi->notifier);
+ media_entity_cleanup(&dcmi->vdev->entity);
v4l2_device_unregister(&dcmi->v4l2_dev);
+ media_device_cleanup(&dcmi->mdev);
dma_release_channel(dcmi->dma_chan);
--
2.7.4
