[PATCH 00/13] Better handle pads for tuning/decoder part of the devices

[Mauro Carvalho Chehab <mchehab+samsung@kernel.org>]

At PC consumer devices, it is very common that the bridge same driver 
to be attached to different types of tuners and demods. We need a way
for the Kernel to properly identify what kind of signal is provided by each
PAD, in order to properly setup the pipelines.

The previous approach were to hardcode a fixed number of PADs for all
elements of the same type. This is not good, as different devices may 
actually have a different number of pads.

It was acceptable in the past, as there were a promisse of adding "soon"
a properties API that would allow to identify the type for each PADs, but
this was never merged (or even a patchset got submitted).

So, replace this approach by another one: add a "taint" mark to pads that
contain different types of signals.

I tried to minimize the number of signals, in order to make it simpler to
convert from the past way.

For now, it is tested only with a simple grabber device. I intend to do
more tests before merging it, but it would be interesting to have this
merged for Kernel 4.19, as we'll now be exposing the pad index via
the MC API version 2.

Mauro Carvalho Chehab (13):
  media: v4l2: remove VBI output pad
  media: v4l2: taint pads with the signal types for consumer devices
  v4l2-mc: switch it to use the new approach to setup pipelines
  media: dvb: use signals to discover pads
  media: au0828: use signals instead of hardcoding a pad number
  media: au8522: declare its own pads
  media: msp3400: declare its own pads
  media: saa7115: declare its own pads
  media: tvp5150: declare its own pads
  media: si2157: declare its own pads
  media: saa7134: declare its own pads
  media: mxl111sf: declare its own pads
  media: v4l2-mc: get rid of global pad indexes

 drivers/media/dvb-core/dvbdev.c              | 19 +++--
 drivers/media/dvb-frontends/au8522_decoder.c | 10 ++-
 drivers/media/dvb-frontends/au8522_priv.h    |  9 ++-
 drivers/media/i2c/msp3400-driver.c           |  6 +-
 drivers/media/i2c/msp3400-driver.h           |  8 +-
 drivers/media/i2c/saa7115.c                  | 18 +++--
 drivers/media/i2c/tvp5150.c                  | 21 ++++--
 drivers/media/media-entity.c                 | 26 +++++++
 drivers/media/pci/saa7134/saa7134-core.c     |  9 ++-
 drivers/media/pci/saa7134/saa7134.h          |  8 +-
 drivers/media/tuners/si2157.c                | 11 ++-
 drivers/media/tuners/si2157_priv.h           |  9 ++-
 drivers/media/usb/au0828/au0828-core.c       | 12 +--
 drivers/media/usb/dvb-usb-v2/mxl111sf.c      |  8 +-
 drivers/media/usb/dvb-usb-v2/mxl111sf.h      |  8 +-
 drivers/media/v4l2-core/tuner-core.c         | 18 +++++
 drivers/media/v4l2-core/v4l2-mc.c            | 73 +++++++++++++-----
 include/media/media-entity.h                 | 54 ++++++++++++++
 include/media/v4l2-mc.h                      | 78 --------------------
 19 files changed, 266 insertions(+), 139 deletions(-)

-- 
2.17.1