| Message ID | 1404599185-12353-5-git-send-email-ben.dooks@codethink.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Ben, Thanks for a patch update. According to my calculations, this is a v5, not a v3. And please follow the subject line convention like [PATCH V5 4/6] subject text follows and use the same version in all patches of a series - this simplifies their handling. You can use something like --subject-prefix="PATCH V6" for your git format-patch to automate this. On Sat, 5 Jul 2014, Ben Dooks wrote: > Add initial support for OF based soc-camera devices that may be used > by any of the soc-camera drivers. The driver itself will need converting > to use OF. > > These changes allow the soc-camera driver to do the connecting of any > async capable v4l2 device to the soc-camera driver. This has currently > been tested on the Renesas Lager board. > > It currently only supports one input device per driver as this seems > to be the standard connection for these devices. > > Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> > --- > > Fixes since v1: > - Fix i2c mclk name compatible with other drivers > - Ensure of_node is put after use > Fixes since v2: > - Updated freeing of dyn-pdev as requested > - Coding style fixes > - Allocate initial resources in one go > --- > drivers/media/platform/soc_camera/soc_camera.c | 123 ++++++++++++++++++++++++- > 1 file changed, 122 insertions(+), 1 deletion(-) > > diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c > index 7fec8cd..e25fc8e 100644 > --- a/drivers/media/platform/soc_camera/soc_camera.c > +++ b/drivers/media/platform/soc_camera/soc_camera.c > @@ -36,6 +36,7 @@ > #include <media/v4l2-common.h> > #include <media/v4l2-ioctl.h> > #include <media/v4l2-dev.h> > +#include <media/v4l2-of.h> > #include <media/videobuf-core.h> > #include <media/videobuf2-core.h> > > @@ -1581,6 +1582,124 @@ static void scan_async_host(struct soc_camera_host *ici) > #define scan_async_host(ici) do {} while (0) > #endif > > +#ifdef CONFIG_OF > + > +struct soc_of_info { > + struct soc_camera_async_subdev sasd; > + struct v4l2_async_subdev *subdevs[2]; > +}; Yes, this is a right direction, however, why do you use an array of 2 subdev pointers? You only seem to be using one of them? > + > +static int soc_of_bind(struct soc_camera_host *ici, > + struct device_node *ep, > + struct device_node *remote) > +{ > + struct soc_camera_device *icd; > + struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; > + struct soc_camera_async_client *sasc; > + struct soc_of_info *info; > + struct i2c_client *client; > + char clk_name[V4L2_SUBDEV_NAME_SIZE]; > + int ret; > + > + /* allocate a new subdev and add match info to it */ > + info = devm_kzalloc(ici->v4l2_dev.dev, sizeof(struct soc_of_info), > + GFP_KERNEL); > + if (!info) > + return -ENOMEM; > + > + info->sasd.asd.match.of.node = remote; > + info->sasd.asd.match_type = V4L2_ASYNC_MATCH_OF; > + info->subdevs[0] = &info->sasd.asd; > + > + /* Or shall this be managed by the soc-camera device? */ > + sasc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sasc), GFP_KERNEL); Why not also add struct soc_camera_async_client to struct soc_of_info? Thanks Guennadi > + if (!sasc) > + return -ENOMEM; > + > + /* HACK: just need a != NULL */ > + sdesc.host_desc.board_info = ERR_PTR(-ENODATA); > + > + ret = soc_camera_dyn_pdev(&sdesc, sasc); > + if (ret < 0) > + goto eallocpdev; > + > + sasc->sensor = &info->sasd.asd; > + > + icd = soc_camera_add_pdev(sasc); > + if (!icd) { > + ret = -ENOMEM; > + goto eaddpdev; > + } > + > + sasc->notifier.subdevs = info->subdevs; > + sasc->notifier.num_subdevs = 1; > + sasc->notifier.bound = soc_camera_async_bound; > + sasc->notifier.unbind = soc_camera_async_unbind; > + sasc->notifier.complete = soc_camera_async_complete; > + > + icd->sasc = sasc; > + icd->parent = ici->v4l2_dev.dev; > + > + client = of_find_i2c_device_by_node(remote); > + > + if (client) > + snprintf(clk_name, sizeof(clk_name), "%d-%04x", > + client->adapter->nr, client->addr); > + else > + snprintf(clk_name, sizeof(clk_name), "of-%s", > + of_node_full_name(remote)); > + > + icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, "mclk", icd); > + if (IS_ERR(icd->clk)) { > + ret = PTR_ERR(icd->clk); > + goto eclkreg; > + } > + > + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); > + if (!ret) > + return 0; > +eclkreg: > + icd->clk = NULL; > + platform_device_del(sasc->pdev); > +eaddpdev: > + platform_device_put(sasc->pdev); > +eallocpdev: > + devm_kfree(ici->v4l2_dev.dev, sasc); > + dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); > + > + return ret; > +} > + > +static void scan_of_host(struct soc_camera_host *ici) > +{ > + struct device_node *np = ici->v4l2_dev.dev->of_node; > + struct device_node *epn = NULL; > + struct device_node *ren; > + > + while (true) { > + epn = of_graph_get_next_endpoint(np, epn); > + if (!epn) > + break; > + > + ren = of_graph_get_remote_port(epn); > + if (!ren) { > + pr_info("%s: no remote for %s\n", > + __func__, of_node_full_name(epn)); > + continue; > + } > + > + /* so we now have a remote node to connect */ > + soc_of_bind(ici, epn, ren->parent); > + > + of_node_put(epn); > + of_node_put(ren); > + } > +} > + > +#else > +static inline void scan_of_host(struct soc_camera_host *ici) { } > +#endif > + > /* Called during host-driver probe */ > static int soc_camera_probe(struct soc_camera_host *ici, > struct soc_camera_device *icd) > @@ -1832,7 +1951,9 @@ int soc_camera_host_register(struct soc_camera_host *ici) > mutex_init(&ici->host_lock); > mutex_init(&ici->clk_lock); > > - if (ici->asd_sizes) > + if (ici->v4l2_dev.dev->of_node) > + scan_of_host(ici); > + else if (ici->asd_sizes) > /* > * No OF, host with a list of subdevices. Don't try to mix > * modes by initialising some groups statically and some > -- > 2.0.0 > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c index 7fec8cd..e25fc8e 100644 --- a/drivers/media/platform/soc_camera/soc_camera.c +++ b/drivers/media/platform/soc_camera/soc_camera.c @@ -36,6 +36,7 @@ #include <media/v4l2-common.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-dev.h> +#include <media/v4l2-of.h> #include <media/videobuf-core.h> #include <media/videobuf2-core.h> @@ -1581,6 +1582,124 @@ static void scan_async_host(struct soc_camera_host *ici) #define scan_async_host(ici) do {} while (0) #endif +#ifdef CONFIG_OF + +struct soc_of_info { + struct soc_camera_async_subdev sasd; + struct v4l2_async_subdev *subdevs[2]; +}; + +static int soc_of_bind(struct soc_camera_host *ici, + struct device_node *ep, + struct device_node *remote) +{ + struct soc_camera_device *icd; + struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; + struct soc_camera_async_client *sasc; + struct soc_of_info *info; + struct i2c_client *client; + char clk_name[V4L2_SUBDEV_NAME_SIZE]; + int ret; + + /* allocate a new subdev and add match info to it */ + info = devm_kzalloc(ici->v4l2_dev.dev, sizeof(struct soc_of_info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->sasd.asd.match.of.node = remote; + info->sasd.asd.match_type = V4L2_ASYNC_MATCH_OF; + info->subdevs[0] = &info->sasd.asd; + + /* Or shall this be managed by the soc-camera device? */ + sasc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sasc), GFP_KERNEL); + if (!sasc) + return -ENOMEM; + + /* HACK: just need a != NULL */ + sdesc.host_desc.board_info = ERR_PTR(-ENODATA); + + ret = soc_camera_dyn_pdev(&sdesc, sasc); + if (ret < 0) + goto eallocpdev; + + sasc->sensor = &info->sasd.asd; + + icd = soc_camera_add_pdev(sasc); + if (!icd) { + ret = -ENOMEM; + goto eaddpdev; + } + + sasc->notifier.subdevs = info->subdevs; + sasc->notifier.num_subdevs = 1; + sasc->notifier.bound = soc_camera_async_bound; + sasc->notifier.unbind = soc_camera_async_unbind; + sasc->notifier.complete = soc_camera_async_complete; + + icd->sasc = sasc; + icd->parent = ici->v4l2_dev.dev; + + client = of_find_i2c_device_by_node(remote); + + if (client) + snprintf(clk_name, sizeof(clk_name), "%d-%04x", + client->adapter->nr, client->addr); + else + snprintf(clk_name, sizeof(clk_name), "of-%s", + of_node_full_name(remote)); + + icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, "mclk", icd); + if (IS_ERR(icd->clk)) { + ret = PTR_ERR(icd->clk); + goto eclkreg; + } + + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); + if (!ret) + return 0; +eclkreg: + icd->clk = NULL; + platform_device_del(sasc->pdev); +eaddpdev: + platform_device_put(sasc->pdev); +eallocpdev: + devm_kfree(ici->v4l2_dev.dev, sasc); + dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); + + return ret; +} + +static void scan_of_host(struct soc_camera_host *ici) +{ + struct device_node *np = ici->v4l2_dev.dev->of_node; + struct device_node *epn = NULL; + struct device_node *ren; + + while (true) { + epn = of_graph_get_next_endpoint(np, epn); + if (!epn) + break; + + ren = of_graph_get_remote_port(epn); + if (!ren) { + pr_info("%s: no remote for %s\n", + __func__, of_node_full_name(epn)); + continue; + } + + /* so we now have a remote node to connect */ + soc_of_bind(ici, epn, ren->parent); + + of_node_put(epn); + of_node_put(ren); + } +} + +#else +static inline void scan_of_host(struct soc_camera_host *ici) { } +#endif + /* Called during host-driver probe */ static int soc_camera_probe(struct soc_camera_host *ici, struct soc_camera_device *icd) @@ -1832,7 +1951,9 @@ int soc_camera_host_register(struct soc_camera_host *ici) mutex_init(&ici->host_lock); mutex_init(&ici->clk_lock); - if (ici->asd_sizes) + if (ici->v4l2_dev.dev->of_node) + scan_of_host(ici); + else if (ici->asd_sizes) /* * No OF, host with a list of subdevices. Don't try to mix * modes by initialising some groups statically and some
Add initial support for OF based soc-camera devices that may be used by any of the soc-camera drivers. The driver itself will need converting to use OF. These changes allow the soc-camera driver to do the connecting of any async capable v4l2 device to the soc-camera driver. This has currently been tested on the Renesas Lager board. It currently only supports one input device per driver as this seems to be the standard connection for these devices. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> --- Fixes since v1: - Fix i2c mclk name compatible with other drivers - Ensure of_node is put after use Fixes since v2: - Updated freeing of dyn-pdev as requested - Coding style fixes - Allocate initial resources in one go --- drivers/media/platform/soc_camera/soc_camera.c | 123 ++++++++++++++++++++++++- 1 file changed, 122 insertions(+), 1 deletion(-)