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k1📷 fix the issue where udev scans nodes to release subdev node resource when the camera in use

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Change-Id: Ia1a058965c379875e3f0ff91d5a4a87774dcd34e
Signed-off-by: lizhirong <zhirong.li@spacemit.com>
This commit is contained in:
lizhirong 2025-05-22 09:31:57 +08:00 • committed by 张猛
parent 563969041a
commit f491cb1513
2 changed files with 20 additions and 11 deletions
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30
drivers/media/platform/spacemit/camera/vi/subdev.c
View file

@ -16,7 +16,11 @@
static int spm_subdev_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) static int spm_subdev_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{ {
struct spm_camera_subdev *sc_subdev = v4l2_subdev_to_sc_subdev(sd); struct spm_camera_subdev *sc_subdev = v4l2_subdev_to_sc_subdev(sd);
cam_dbg("%s(%s) enter.", __func__, sc_subdev->name); cam_dbg("%s(%s) enter. cnt:%d", __func__, sc_subdev->name, atomic_read(&sc_subdev->ref_cnt));
if (atomic_inc_return(&sc_subdev->ref_cnt) != 1)
cam_warn("subdev(%s) was already openned.", sc_subdev->name);
return 0; return 0;
} }
@ -28,18 +32,22 @@ static int spm_subdev_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
struct spm_camera_subdev *sc_subdev = v4l2_subdev_to_sc_subdev(sd); struct spm_camera_subdev *sc_subdev = v4l2_subdev_to_sc_subdev(sd);
struct media_pipeline *pipe = media_entity_pipeline(me); struct media_pipeline *pipe = media_entity_pipeline(me);
cam_dbg("%s(%s) enter.", __func__, sc_subdev->name); cam_dbg("%s(%s) enter. cnt:%d", __func__, sc_subdev->name, atomic_read(&sc_subdev->ref_cnt));
mutex_lock(&mdev->graph_mutex);
if (pipe) { if (atomic_dec_and_test(&sc_subdev->ref_cnt)) {
sc_pipeline = media_pipeline_to_sc_pipeline(pipe); mutex_lock(&mdev->graph_mutex);
if (sc_pipeline->state >= PIPELINE_ST_STARTED) { if (pipe) {
__spm_mlink_stop_pipeline(me); sc_pipeline = media_pipeline_to_sc_pipeline(pipe);
} if (sc_pipeline->state >= PIPELINE_ST_STARTED) {
while (sc_pipeline->state >= PIPELINE_ST_GET) { __spm_mlink_stop_pipeline(me);
__spm_mlink_put_pipeline(me, 1); }
while (sc_pipeline->state >= PIPELINE_ST_GET) {
__spm_mlink_put_pipeline(me, 1);
}
} }
mutex_unlock(&mdev->graph_mutex);
} }
mutex_unlock(&mdev->graph_mutex);
return 0; return 0;
} }

1
drivers/media/platform/spacemit/camera/vi/subdev.h
View file

@ -36,6 +36,7 @@ struct spm_camera_subdev {
struct notifier_block vnode_nb; struct notifier_block vnode_nb;
uint32_t pads_stream_enable; uint32_t pads_stream_enable;
int is_resetting; int is_resetting;
atomic_t ref_cnt;
long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg); long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg);
void (*release)(struct spm_camera_subdev *sc_subdev); void (*release)(struct spm_camera_subdev *sc_subdev);
void (*notify)(struct spm_camera_subdev *sc_subdev, unsigned int notification, void (*notify)(struct spm_camera_subdev *sc_subdev, unsigned int notification,