diff options
Diffstat (limited to 'drivers/staging/media/imx/imx-media-dev.c')
-rw-r--r-- | drivers/staging/media/imx/imx-media-dev.c | 164 |
1 files changed, 55 insertions, 109 deletions
diff --git a/drivers/staging/media/imx/imx-media-dev.c b/drivers/staging/media/imx/imx-media-dev.c index b0be80f05767..4b344a4a3706 100644 --- a/drivers/staging/media/imx/imx-media-dev.c +++ b/drivers/staging/media/imx/imx-media-dev.c @@ -29,47 +29,14 @@ static inline struct imx_media_dev *notifier2dev(struct v4l2_async_notifier *n) { - return container_of(n, struct imx_media_dev, subdev_notifier); + return container_of(n, struct imx_media_dev, notifier); } /* - * Find an asd by fwnode or device name. This is called during - * driver load to form the async subdev list and bind them. - */ -static struct v4l2_async_subdev * -find_async_subdev(struct imx_media_dev *imxmd, - struct fwnode_handle *fwnode, - const char *devname) -{ - struct imx_media_async_subdev *imxasd; - struct v4l2_async_subdev *asd; - - list_for_each_entry(imxasd, &imxmd->asd_list, list) { - asd = &imxasd->asd; - switch (asd->match_type) { - case V4L2_ASYNC_MATCH_FWNODE: - if (fwnode && asd->match.fwnode == fwnode) - return asd; - break; - case V4L2_ASYNC_MATCH_DEVNAME: - if (devname && !strcmp(asd->match.device_name, - devname)) - return asd; - break; - default: - break; - } - } - - return NULL; -} - - -/* - * Adds a subdev to the async subdev list. If fwnode is non-NULL, adds - * the async as a V4L2_ASYNC_MATCH_FWNODE match type, otherwise as - * a V4L2_ASYNC_MATCH_DEVNAME match type using the dev_name of the - * given platform_device. This is called during driver load when + * Adds a subdev to the root notifier's async subdev list. If fwnode is + * non-NULL, adds the async as a V4L2_ASYNC_MATCH_FWNODE match type, + * otherwise as a V4L2_ASYNC_MATCH_DEVNAME match type using the dev_name + * of the given platform_device. This is called during driver load when * forming the async subdev list. */ int imx_media_add_async_subdev(struct imx_media_dev *imxmd, @@ -80,47 +47,43 @@ int imx_media_add_async_subdev(struct imx_media_dev *imxmd, struct imx_media_async_subdev *imxasd; struct v4l2_async_subdev *asd; const char *devname = NULL; - int ret = 0; - - mutex_lock(&imxmd->mutex); + int ret; - if (pdev) + if (fwnode) { + asd = v4l2_async_notifier_add_fwnode_subdev( + &imxmd->notifier, fwnode, sizeof(*imxasd)); + } else { devname = dev_name(&pdev->dev); - - /* return -EEXIST if this asd already added */ - if (find_async_subdev(imxmd, fwnode, devname)) { - dev_dbg(imxmd->md.dev, "%s: already added %s\n", - __func__, np ? np->name : devname); - ret = -EEXIST; - goto out; + asd = v4l2_async_notifier_add_devname_subdev( + &imxmd->notifier, devname, sizeof(*imxasd)); } - imxasd = devm_kzalloc(imxmd->md.dev, sizeof(*imxasd), GFP_KERNEL); - if (!imxasd) { - ret = -ENOMEM; - goto out; - } - asd = &imxasd->asd; - - if (fwnode) { - asd->match_type = V4L2_ASYNC_MATCH_FWNODE; - asd->match.fwnode = fwnode; - } else { - asd->match_type = V4L2_ASYNC_MATCH_DEVNAME; - asd->match.device_name = devname; - imxasd->pdev = pdev; + if (IS_ERR(asd)) { + ret = PTR_ERR(asd); + if (ret == -EEXIST) { + if (np) + dev_dbg(imxmd->md.dev, "%s: already added %pOFn\n", + __func__, np); + else + dev_dbg(imxmd->md.dev, "%s: already added %s\n", + __func__, devname); + } + return ret; } - list_add_tail(&imxasd->list, &imxmd->asd_list); + imxasd = to_imx_media_asd(asd); - imxmd->subdev_notifier.num_subdevs++; + if (devname) + imxasd->pdev = pdev; - dev_dbg(imxmd->md.dev, "%s: added %s, match type %s\n", - __func__, np ? np->name : devname, np ? "FWNODE" : "DEVNAME"); + if (np) + dev_dbg(imxmd->md.dev, "%s: added %pOFn, match type FWNODE\n", + __func__, np); + else + dev_dbg(imxmd->md.dev, "%s: added %s, match type DEVNAME\n", + __func__, devname); -out: - mutex_unlock(&imxmd->mutex); - return ret; + return 0; } /* @@ -175,7 +138,7 @@ out: } /* - * create the media links for all subdevs that registered async. + * Create the media links for all subdevs that registered. * Called after all async subdevs have bound. */ static int imx_media_create_links(struct v4l2_async_notifier *notifier) @@ -184,14 +147,7 @@ static int imx_media_create_links(struct v4l2_async_notifier *notifier) struct v4l2_subdev *sd; int ret; - /* - * Only links are created between subdevices that are known - * to the async notifier. If there are other non-async subdevices, - * they were created internally by some subdevice (smiapp is one - * example). In those cases it is expected the subdevice is - * responsible for creating those internal links. - */ - list_for_each_entry(sd, ¬ifier->done, async_list) { + list_for_each_entry(sd, &imxmd->v4l2_dev.subdevs, list) { switch (sd->grp_id) { case IMX_MEDIA_GRP_ID_VDIC: case IMX_MEDIA_GRP_ID_IC_PRP: @@ -211,7 +167,10 @@ static int imx_media_create_links(struct v4l2_async_notifier *notifier) imx_media_create_csi_of_links(imxmd, sd); break; default: - /* this is an external fwnode subdev */ + /* + * if this subdev has fwnode links, create media + * links for them. + */ imx_media_create_of_links(imxmd, sd); break; } @@ -391,7 +350,7 @@ static int imx_media_inherit_controls(struct imx_media_dev *imxmd, ret = v4l2_ctrl_add_handler(vfd->ctrl_handler, sd->ctrl_handler, - NULL); + NULL, true); if (ret) return ret; } @@ -487,10 +446,8 @@ static int imx_media_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *node = dev->of_node; - struct imx_media_async_subdev *imxasd; - struct v4l2_async_subdev **subdevs; struct imx_media_dev *imxmd; - int num_subdevs, i, ret; + int ret; imxmd = devm_kzalloc(dev, sizeof(*imxmd), GFP_KERNEL); if (!imxmd) @@ -498,14 +455,14 @@ static int imx_media_probe(struct platform_device *pdev) dev_set_drvdata(dev, imxmd); - strlcpy(imxmd->md.model, "imx-media", sizeof(imxmd->md.model)); + strscpy(imxmd->md.model, "imx-media", sizeof(imxmd->md.model)); imxmd->md.ops = &imx_media_md_ops; imxmd->md.dev = dev; mutex_init(&imxmd->mutex); imxmd->v4l2_dev.mdev = &imxmd->md; - strlcpy(imxmd->v4l2_dev.name, "imx-media", + strscpy(imxmd->v4l2_dev.name, "imx-media", sizeof(imxmd->v4l2_dev.name)); media_device_init(&imxmd->md); @@ -519,47 +476,34 @@ static int imx_media_probe(struct platform_device *pdev) dev_set_drvdata(imxmd->v4l2_dev.dev, imxmd); - INIT_LIST_HEAD(&imxmd->asd_list); INIT_LIST_HEAD(&imxmd->vdev_list); + v4l2_async_notifier_init(&imxmd->notifier); + ret = imx_media_add_of_subdevs(imxmd, node); if (ret) { v4l2_err(&imxmd->v4l2_dev, "add_of_subdevs failed with %d\n", ret); - goto unreg_dev; + goto notifier_cleanup; } ret = imx_media_add_internal_subdevs(imxmd); if (ret) { v4l2_err(&imxmd->v4l2_dev, "add_internal_subdevs failed with %d\n", ret); - goto unreg_dev; + goto notifier_cleanup; } - num_subdevs = imxmd->subdev_notifier.num_subdevs; - /* no subdevs? just bail */ - if (num_subdevs == 0) { + if (list_empty(&imxmd->notifier.asd_list)) { ret = -ENODEV; - goto unreg_dev; + goto notifier_cleanup; } - subdevs = devm_kcalloc(imxmd->md.dev, num_subdevs, sizeof(*subdevs), - GFP_KERNEL); - if (!subdevs) { - ret = -ENOMEM; - goto unreg_dev; - } - - i = 0; - list_for_each_entry(imxasd, &imxmd->asd_list, list) - subdevs[i++] = &imxasd->asd; - /* prepare the async subdev notifier and register it */ - imxmd->subdev_notifier.subdevs = subdevs; - imxmd->subdev_notifier.ops = &imx_media_subdev_ops; + imxmd->notifier.ops = &imx_media_subdev_ops; ret = v4l2_async_notifier_register(&imxmd->v4l2_dev, - &imxmd->subdev_notifier); + &imxmd->notifier); if (ret) { v4l2_err(&imxmd->v4l2_dev, "v4l2_async_notifier_register failed with %d\n", ret); @@ -570,7 +514,8 @@ static int imx_media_probe(struct platform_device *pdev) del_int: imx_media_remove_internal_subdevs(imxmd); -unreg_dev: +notifier_cleanup: + v4l2_async_notifier_cleanup(&imxmd->notifier); v4l2_device_unregister(&imxmd->v4l2_dev); cleanup: media_device_cleanup(&imxmd->md); @@ -584,8 +529,9 @@ static int imx_media_remove(struct platform_device *pdev) v4l2_info(&imxmd->v4l2_dev, "Removing imx-media\n"); - v4l2_async_notifier_unregister(&imxmd->subdev_notifier); + v4l2_async_notifier_unregister(&imxmd->notifier); imx_media_remove_internal_subdevs(imxmd); + v4l2_async_notifier_cleanup(&imxmd->notifier); v4l2_device_unregister(&imxmd->v4l2_dev); media_device_unregister(&imxmd->md); media_device_cleanup(&imxmd->md); |