Re: [PATCH] media: Kconfig: Add configuration entry for MEDIA_MEM2MEM_SUPPORT

From: Priit Laes
Date: Wed Dec 05 2018 - 21:15:45 EST


On Wed, Dec 05, 2018 at 05:47:03PM -0200, Mauro Carvalho Chehab wrote:
> Em Mon, 26 Nov 2018 18:38:44 +0200
> Priit Laes <plaes@xxxxxxxxx> escreveu:
>
> > Currently there is no easy way to enable mem2mem based video
> > processor drivers (cedrus for example). Simplify this by adding
> > separate category to media support.
> >
> > Signed-off-by: Priit Laes <plaes@xxxxxxxxx>
> > ---
> > drivers/media/Kconfig | 12 ++++++++++--
> > 1 file changed, 10 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig
> > index 8add62a18293..f2a773896dcf 100644
> > --- a/drivers/media/Kconfig
> > +++ b/drivers/media/Kconfig
> > @@ -56,6 +56,14 @@ config MEDIA_DIGITAL_TV_SUPPORT
> > Say Y when you have a board with digital support or a board with
> > hybrid digital TV and analog TV.
> >
> > +config MEDIA_MEM2MEM_SUPPORT
> > + bool "Mem2mem devices (stateless media decoders/encoders support)"
> > + ---help---
> > + Enable support for mem2mem / stateless media decoders/encoders.
> > +
> > + Say Y when you have a system with stateless media encoder/decoder
> > + support.
> > +
> > config MEDIA_RADIO_SUPPORT
> > bool "AM/FM radio receivers/transmitters support"
> > ---help---
> > @@ -95,7 +103,7 @@ source "drivers/media/cec/Kconfig"
> >
> > config MEDIA_CONTROLLER
> > bool "Media Controller API"
> > - depends on MEDIA_CAMERA_SUPPORT || MEDIA_ANALOG_TV_SUPPORT || MEDIA_DIGITAL_TV_SUPPORT
> > + depends on MEDIA_CAMERA_SUPPORT || MEDIA_ANALOG_TV_SUPPORT || MEDIA_DIGITAL_TV_SUPPORT || MEDIA_MEM2MEM_SUPPORT
> > ---help---
> > Enable the media controller API used to query media devices internal
> > topology and configure it dynamically.
> > @@ -118,7 +126,7 @@ config MEDIA_CONTROLLER_DVB
> > config VIDEO_DEV
> > tristate
> > depends on MEDIA_SUPPORT
> > - depends on MEDIA_CAMERA_SUPPORT || MEDIA_ANALOG_TV_SUPPORT || MEDIA_RADIO_SUPPORT || MEDIA_SDR_SUPPORT
> > + depends on MEDIA_CAMERA_SUPPORT || MEDIA_ANALOG_TV_SUPPORT || MEDIA_RADIO_SUPPORT || MEDIA_SDR_SUPPORT || MEDIA_MEM2MEM_SUPPORT
> > default y
> >
> > config VIDEO_V4L2_SUBDEV_API
>
> Hmm... this patch looks incomplete. I mean, the main goal of those
> MEDIA_*_SUPPORT is to make simpler for the users to select a
> subset of the drivers. Those options actually make visible
> the corresponding entries for pci/usb/... drivers. So,
> for example, drivers/media/usb/Kconfig contains:
>
> if MEDIA_CAMERA_SUPPORT
> comment "Webcam devices"
> source "drivers/media/usb/uvc/Kconfig"
> source "drivers/media/usb/gspca/Kconfig"
> source "drivers/media/usb/pwc/Kconfig"
> source "drivers/media/usb/cpia2/Kconfig"
> source "drivers/media/usb/zr364xx/Kconfig"
> source "drivers/media/usb/stkwebcam/Kconfig"
> source "drivers/media/usb/s2255/Kconfig"
> source "drivers/media/usb/usbtv/Kconfig"
> endif
>
> If we'll be adding it, I would expect a corresponding change at
> drivers/media/platform/Kconfig.

Thanks, I will look into it. The current approach at least made it
somewhat easier to enable sunxi-cedrus via menuconfig.
>
> Thanks,
> Mauro