Re: [Buildroot] [PATCH 1/1] package/dvb-firmware: new package

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello Bernd,

On Tue, 27 Dec 2022 23:30:45 +0100
Bernd Kuhls <bernd.kuhls@t-online.de> wrote:

> > Do we know why these firmware files are not part of the linux-firmware
> > project? They are needed in conjunction with which kernel drivers?  
> 
> The history of this repo is unknown to me, it is used by the LibreELEC 
> project in their images. Personally I need only these firmware files:
> 
> BR2_PACKAGE_DVB_FIRMWARE_FILES="dvb-demod-m88rs6000.fw dvb-demod-si2168-
> d60-01.fw v4l-cx23885-avcore-01.fw"
> 
> for the cx23885/m88ds3103/si2168 kernel modules needed by this card:
> 
> 05:00.0 Multimedia video controller: Conexant Systems, Inc. CX23887/8 
> PCIe Broadcast Audio and Video Decoder with 3D Comb (rev 04)
> 
> (aka Hauppauge WinTV-HVR-5525HD)
> 
> These firmware files are not present in the linux-firmware package.
> 
> To pick up Yann's proposal: How about adding a device-specific Config.in 
> option for these firmware files like
> 
> config BR2_PACKAGE_DVB_FIRMWARE_WINTV_5525HD
>     bool "firmware for Hauppauge WinTV-HVR-5525HD"

This would certainly be OK, *but* you would need to first clarify under
what license these particular firmware files are released.

Even though I'm not sure it's totally useful, I've noticed that the
kernel ships with a scripts/get_dvb_firmware script that allows to
download some DVB firmware from various locations. One of the locations
is https://linuxtv.org/downloads/firmware/. But it hasn't been updated
since 2014, and seems to have less firmware that the LibrELEC repo.

For me, the LibrELEC repo is fine, as long as there is licensing
information for the different firmware files.

Or we need to invent a special license mechanism in Buildroot that
clarifies that the build results cannot be redistributed (which would
of course be confusing with _REDISTRIBUTE = YES/NO, which means a
different thing).

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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