Linuxtv out-of-tree kernel modules

[th0ma7]

Motivation: Long-term goal of providing media_tree kernel modules for various DVB dongles.
Linked issues: Redo of previous PR #4080

Checklist

• Build rule all-supported completed successfully
• Package upgrade completed successfully
• New installation of package completed successfully

IMPORTANT

1. This PR also include changes in spksrc.checksum.mk code in order to allow multiple package target checksums. See change at commit 560e379 This is being used to manage different git hash downloads based on kernel compatibility for LinuxTV snapshots. TODO: Remove this patch and rebase on master following merge of Enhance checksum verification for multiple files #4566
2. This PR also produces two different package versions: one for 3.10 kernels using a specific git hash, and the other for 4.4 kernel using latest git hash available.

Compatible kernels and DSM versions

• 4.4.59+ (DSM-6.2.3)
• 4.4.15+ (DSM-6.1)
• 3.10.105 (DSM-6.2.3)

Incompatible kernels (<3.10)

• 3.6.11 (SRM-1.2) - northstarplus
• 3.4.35 (DSM-6.2.3) - armv7l - hi3535
• 3.2.40 (DSM-6.2.3) - armada370, armada375, armadaxp, comcerto2k, evansport
• 2.6.32 (DSM-6.2.3) - 88f6281, qoriq

Unsuccessful builds

• alpine (DSM-6.2.3 - 3.10.105 - armv7)
• armada38x (DSM-6.2.3 - 3.10.105 - armv7)
• monaco (DSM-6.2.3 - 3.10.105 - armv7)
• armada37xx (DSM-6.2.3 - 4.4.59 - armv8)
• rtd1296 (DSM-6.2.3 - 4.4.59 - armv8)

Successful builds

make -j2 arch-dakota-1.2 arch-ipq806x-1.2

• dakota (SRM-1.2 - 4.4.60)
• ipq806x (SRM-1.2 - 4.4.60)

---

make -j6 arch-apollolake-6.2.3 arch-broadwellnk-6.2.3 arch-denverton-6.2.3 arch-geminilake-6.2.3 arch-purley-6.2.3 arch-v1000-6.2.3

• apollolake (DSM-6.2.3 - 4.4.59)
• broadwellnk (DSM-6.2.3 - 4.4.59)
• denverton (DSM-6.2.3 - 4.4.59)
• geminilake (DSM-6.2.3 - 4.4.59)
• purley (DSM-6.2.3 - 4.4.59)
• v1000 (DSM-6.2.3 - 4.4.59)

---

make -j7 arch-avoton-6.2.3 arch-braswell-6.2.3 arch-broadwell-6.2.3 arch-bromolow-6.2.3 arch-cedarview-6.2.3 arch-dockerx64-6.2.3 arch-grantley-6.2.3

• avoton (DSM-6.2.3 - 3.10.105)
• braswell (DSM-6.2.3 - 3.10.105)
• broadwell (DSM-6.2.3 - 3.10.105)
• bromolow (DSM-6.2.3 - 3.10.105)
• cedarview (DSM-6.2.3 - 3.10.105)
• dockerx64 (DSM-6.2.3 - 3.10.105)
• grantley (DSM-6.2.3 - 3.10.105)

[th0ma7]

@ymartin59 finally got something in a runnable state using out-of-tree kernel module builds. Your thoughts would be appreciated. Currently only works with 4.4.x kernels (and not really looking into making this work for older kernels neither).

Basically the intent is to have a generic linuxtv package with, by default:

• contains all the updated modules from the linux-media tree built for the running kernel
• uses a generic linuxtv.sh script I've created to load/unload modules
• calls the generic startup script to load a basic set of modules (e.g. high-level v4l .ko)

Idea are then:

1. to create subsequent "empty" packages to load, lets say, modules for a Hauppauge dongle (i.e. linuxtv-hauppauge). The package only contains the start-stop-status script which calls the generic linuxtv.sh scripts from the main package with the list of modules to load for the corresponding vendor DVB "dongles" in the right order.
2. come-up with a way to create a configuration pannel so you select your usb dvb dongle which then calll the load/unload script accordingly (no clue how to do that).

[th0ma7]

@hgy59 and @ymartin59 PR is now ready for your review and merge.
No more changes needed.
This PR is dependent of #4420

[micenusa]

Is there any hope to have DVB support in DSM 7.0? I have 3 tuners to test:Xbox Tv tuner, Avermedia and Win tv-dual HD. If I can help, please let me know!

[belgio99]

Crossposting here as well since it could be helpful for someone:

I managed to make the Hauppauge WinTV-dualHD (and possibly other devices?) work with DSM 7.

I'm currently using it flawlessly with DSM 7.2.1 and Plex. Unless you're using Geminilake as I am, you'll have to compile the drivers yourself, but what I wrote may help you on how to do it.
Details and guide at https://github.com/belgio99/dsm7-dvb-drivers
(My repo gives a general idea on how I did it: depending on your architecture and CPU family, your mileage may vary).