From 7047f2982a223e0ecca480c11a37bd9edf62b65a Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Fri, 5 Feb 2016 13:16:18 -0200 Subject: [PATCH] [media] v4l2-mc: add an ancillary routine for PCI-based MC Instead of copyping the same code on all PCI devices that would have a media controller, add a core ancillary routine. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/v4l2-core/v4l2-mc.c | 35 +++++++++++++++++++++++++++++++ include/media/v4l2-mc.h | 24 ++++++++++++++++++++- 2 files changed, 58 insertions(+), 1 deletion(-) diff --git a/drivers/media/v4l2-core/v4l2-mc.c b/drivers/media/v4l2-core/v4l2-mc.c index e6d2a711bb0b..b6cf6dbd4cd5 100644 --- a/drivers/media/v4l2-core/v4l2-mc.c +++ b/drivers/media/v4l2-core/v4l2-mc.c @@ -15,9 +15,44 @@ */ #include +#include #include #include + +struct media_device *v4l2_mc_pci_media_device_init(struct pci_dev *pci_dev, + char *name) +{ +#ifdef CONFIG_PCI + struct media_device *mdev; + + mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); + if (!mdev) + return NULL; + + mdev->dev = &pci_dev->dev; + + if (name) + strlcpy(mdev->model, name, sizeof(mdev->model)); + else + strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); + + sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); + + mdev->hw_revision = pci_dev->subsystem_vendor << 16 + || pci_dev->subsystem_device; + + mdev->driver_version = LINUX_VERSION_CODE; + + media_device_init(mdev); + + return mdev; +#else + return NULL; +#endif +} +EXPORT_SYMBOL_GPL(v4l2_mc_pci_media_device_init); + int v4l2_mc_create_media_graph(struct media_device *mdev) { diff --git a/include/media/v4l2-mc.h b/include/media/v4l2-mc.h index aed9e9b87f82..6fad97277a0b 100644 --- a/include/media/v4l2-mc.h +++ b/include/media/v4l2-mc.h @@ -92,6 +92,10 @@ enum demod_pad_index { DEMOD_NUM_PADS }; + +struct pci_dev; /* We don't need to include pci.h here */ + +#ifdef CONFIG_MEDIA_CONTROLLER /** * v4l2_mc_create_media_graph() - create Media Controller links at the graph. * @@ -106,11 +110,29 @@ enum demod_pad_index { * interface centric PC-consumer's hardware, V4L2 subdev centric camera * hardware should not use this routine, as it will not build the right graph. */ -#ifdef CONFIG_MEDIA_CONTROLLER int v4l2_mc_create_media_graph(struct media_device *mdev); + +/** + * v4l2_mc_pci_media_device_init() - create and initialize a + * struct &media_device from a PCI device. + * + * @pci_dev: pointer to struct pci_dev + * @name: media device name. If %NULL, the routine will use the default + * name for the pci device, given by pci_name() macro. + */ +struct media_device *v4l2_mc_pci_media_device_init(struct pci_dev *pci_dev, + char *name); + + #else static inline int v4l2_mc_create_media_graph(struct media_device *mdev) { return 0; } + +struct media_device *v4l2_mc_pci_media_device_init(struct pci_dev *pci_dev, + char *name) { + return NULL; +} + #endif -- 2.30.2