path: root/drivers/media/Makefile
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2011-03-22[media] media: Entities, pads and linksLaurent Pinchart
As video hardware pipelines become increasingly complex and configurable, the current hardware description through v4l2 subdevices reaches its limits. In addition to enumerating and configuring subdevices, video camera drivers need a way to discover and modify at runtime how those subdevices are connected. This is done through new elements called entities, pads and links. An entity is a basic media hardware building block. It can correspond to a large variety of logical blocks such as physical hardware devices (CMOS sensor for instance), logical hardware devices (a building block in a System-on-Chip image processing pipeline), DMA channels or physical connectors. A pad is a connection endpoint through which an entity can interact with other entities. Data (not restricted to video) produced by an entity flows from the entity's output to one or more entity inputs. Pads should not be confused with physical pins at chip boundaries. A link is a point-to-point oriented connection between two pads, either on the same entity or on different entities. Data flows from a source pad to a sink pad. Links are stored in the source entity. To make backwards graph walk faster, a copy of all links is also stored in the sink entity. The copy is known as a backlink and is only used to help graph traversal. The entity API is made of three functions: - media_entity_init() initializes an entity. The caller must provide an array of pads as well as an estimated number of links. The links array is allocated dynamically and will be reallocated if it grows beyond the initial estimate. - media_entity_cleanup() frees resources allocated for an entity. It must be called during the cleanup phase after unregistering the entity and before freeing it. - media_entity_create_link() creates a link between two entities. An entry in the link array of each entity is allocated and stores pointers to source and sink pads. When a media device is unregistered, all its entities are unregistered automatically. The code is based on Hans Verkuil <> initial work. Signed-off-by: Laurent Pinchart <> Signed-off-by: Sakari Ailus <> Acked-by: Hans Verkuil <> Signed-off-by: Mauro Carvalho Chehab <>
2011-03-22[media] media: Media deviceLaurent Pinchart
The media_device structure abstracts functions common to all kind of media devices (v4l2, dvb, alsa, ...). It manages media entities and offers a userspace API to discover and configure the media device internal topology. Signed-off-by: Laurent Pinchart <> Acked-by: Hans Verkuil <> Signed-off-by: Mauro Carvalho Chehab <>
2011-03-22[media] media: Media device node supportLaurent Pinchart
The media_devnode structure provides support for registering and unregistering character devices using a dynamic major number. Reference counting is handled internally, making device drivers easier to write without having to solve the open/disconnect race condition issue over and over again. The code is based on video/v4l2-dev.c. [ Remove linux/smp_lock.h include to not break compilation on bisect] Signed-off-by: Laurent Pinchart <> Acked-by: Hans Verkuil <> Signed-off-by: Mauro Carvalho Chehab <>
2010-12-29[media] rename drivers/media/IR to drives/media/rcMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <>
2009-12-16V4L/DVB (13612): IR: Move common IR code to drivers/media/IRMauro Carvalho Chehab
This is the first step of creating a common code for IR that can be used by other input devices. For now, keep IR dir at drivers/media, to easy the movement of the IR files, but later patches may move it to drivers/IR or drivers/input/IR. No functional changes is done on this patch. Signed-off-by: Mauro Carvalho Chehab <>
2008-06-05V4L/DVB (7908): always enter drivers/media/video/Adrian Bunk
After commit 039d40019f3c5e26ea50ec5af4270189f63365e1 (V4L/DVB (7898): Fix VIDEO_MEDIA Kconfig logic) VIDEO_MEDIA is no longer usable in Makefile's for deciding which directories we enter, resulting in compile errors like the following with CONFIG_VIDEO_DEV=y, CONFIG_DVB_CORE=m: <-- snip --> ... MODPOST 187 modules ... make[2]: *** [__modpost] Error 1 <-- snip --> The easiest solution is to always enter video/ Signed-off-by: Adrian Bunk <> Acked-by: Ingo Molnar <> Signed-off-by: Mauro Carvalho Chehab <>
2008-05-08Fix drivers/media build for modular buildsIngo Molnar
Fix allmodconfig build bug introduced in latest -git by commit 7c91f0624a9 ("V4L/DVB(7767): Move tuners to common/tuners"): LD kernel/built-in.o LD drivers/built-in.o ld: drivers/media/built-in.o: No such file: No such file or directory which happens if all media drivers are modular: In that case there's no obj-y rule connecting all the built-in.o files and the link tree breaks. The fix is to add a guaranteed obj-y rule for the core vmlinux to build. (which results in an empty object file if all media drivers are modular) Signed-off-by: Ingo Molnar <> Acked-by: Sam Ravnborg <> Signed-off-by: Stephen Rothwell <> Signed-off-by: Linus Torvalds <>
2008-04-29V4L/DVB(7767): Move tuners to common/tunersMauro Carvalho Chehab
There were several issues in the past, caused by the hybrid tuner design, since now, the same tuner can be used by drivers/media/dvb and drivers/media/video. Kconfig items were rearranged, to split V4L/DVB core from their drivers. Signed-off-by: Mauro Carvalho Chehab <>
2008-04-06V4L/DVB (7499): v4l/dvb Kconfig: Fix bugzilla #10067Mauro Carvalho Chehab
tda8290 breaks if tuner is selected, but CONFIG_DVB=n. Signed-off-by: Mauro Carvalho Chehab <>
2007-12-13V4L/DVB (6814): Makefile: always enter video/Adrian Bunk
Since not all code under drivers/media/video/ depends on CONFIG_VIDEO_DEV we cannot only enter it depending on CONFIG_VIDEO_DEV. Signed-off-by: Adrian Bunk <> Signed-off-by: Mauro Carvalho Chehab <>
2007-05-09V4L/DVB (5599): Use menuconfig objects II - DVBJan Engelhardt
Change Kconfig objects from "menu, config" into "menuconfig" so that the user can disable the whole feature without having to enter the menu first. Also remove one indirection (CONFIG_DVB) that does not seem to be really used inside the kernel. Signed-off-by: Jan Engelhardt <> Signed-off-by: Mauro Carvalho Chehab <>
2005-09-09[PATCH] dvb: avoid building empty built-in.oJohannes Stezenbach
Don't build empty built-in.o when DVB/V4L is not configured. Thanks to Sam Ravnborg and Keith Owens. Signed-off-by: Johannes Stezenbach <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2005-04-16Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!