[PATCH v2] [media] mtk-mdp: allocate video_device dynamically
Minghsiu Tsai
minghsiu.tsai at mediatek.com
Mon Nov 14 17:34:34 PST 2016
It can fix known problems with embedded video_device structs.
Signed-off-by: Minghsiu Tsai <minghsiu.tsai at mediatek.com>
---
Changes in v2:
. Call video_device_release() instead of video_unregister_device()
in mtk_mdp_register_m2m_device()
---
drivers/media/platform/mtk-mdp/mtk_mdp_core.h | 2 +-
drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c | 33 ++++++++++++++++-----------
2 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.h b/drivers/media/platform/mtk-mdp/mtk_mdp_core.h
index 848569d..ad1cff3 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.h
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.h
@@ -167,7 +167,7 @@ struct mtk_mdp_dev {
struct mtk_mdp_comp *comp[MTK_MDP_COMP_ID_MAX];
struct v4l2_m2m_dev *m2m_dev;
struct list_head ctx_list;
- struct video_device vdev;
+ struct video_device *vdev;
struct v4l2_device v4l2_dev;
struct workqueue_struct *job_wq;
struct platform_device *vpu_dev;
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
index 9a747e7..13afe48 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
@@ -1236,16 +1236,22 @@ int mtk_mdp_register_m2m_device(struct mtk_mdp_dev *mdp)
int ret;
mdp->variant = &mtk_mdp_default_variant;
- mdp->vdev.device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
- mdp->vdev.fops = &mtk_mdp_m2m_fops;
- mdp->vdev.ioctl_ops = &mtk_mdp_m2m_ioctl_ops;
- mdp->vdev.release = video_device_release_empty;
- mdp->vdev.lock = &mdp->lock;
- mdp->vdev.vfl_dir = VFL_DIR_M2M;
- mdp->vdev.v4l2_dev = &mdp->v4l2_dev;
- snprintf(mdp->vdev.name, sizeof(mdp->vdev.name), "%s:m2m",
+ mdp->vdev = video_device_alloc();
+ if (!mdp->vdev) {
+ dev_err(dev, "failed to allocate video device\n");
+ ret = -ENOMEM;
+ goto err_video_alloc;
+ }
+ mdp->vdev->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+ mdp->vdev->fops = &mtk_mdp_m2m_fops;
+ mdp->vdev->ioctl_ops = &mtk_mdp_m2m_ioctl_ops;
+ mdp->vdev->release = video_device_release;
+ mdp->vdev->lock = &mdp->lock;
+ mdp->vdev->vfl_dir = VFL_DIR_M2M;
+ mdp->vdev->v4l2_dev = &mdp->v4l2_dev;
+ snprintf(mdp->vdev->name, sizeof(mdp->vdev->name), "%s:m2m",
MTK_MDP_MODULE_NAME);
- video_set_drvdata(&mdp->vdev, mdp);
+ video_set_drvdata(mdp->vdev, mdp);
mdp->m2m_dev = v4l2_m2m_init(&mtk_mdp_m2m_ops);
if (IS_ERR(mdp->m2m_dev)) {
@@ -1254,26 +1260,27 @@ int mtk_mdp_register_m2m_device(struct mtk_mdp_dev *mdp)
goto err_m2m_init;
}
- ret = video_register_device(&mdp->vdev, VFL_TYPE_GRABBER, 2);
+ ret = video_register_device(mdp->vdev, VFL_TYPE_GRABBER, 2);
if (ret) {
dev_err(dev, "failed to register video device\n");
goto err_vdev_register;
}
v4l2_info(&mdp->v4l2_dev, "driver registered as /dev/video%d",
- mdp->vdev.num);
+ mdp->vdev->num);
return 0;
err_vdev_register:
v4l2_m2m_release(mdp->m2m_dev);
err_m2m_init:
- video_device_release(&mdp->vdev);
+ video_device_release(mdp->vdev);
+err_video_alloc:
return ret;
}
void mtk_mdp_unregister_m2m_device(struct mtk_mdp_dev *mdp)
{
- video_device_release(&mdp->vdev);
+ video_unregister_device(mdp->vdev);
v4l2_m2m_release(mdp->m2m_dev);
}
--
1.9.1
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