linux: Update to 4.7 (WIP)

[MilhouseVH]

Starting with 4.7-rc4. I'll update this PR as new release candidates appear, until eventually 4.7.0 is released and updated in this PR.

The following patches are now merged upstream in 4.7:

packages/linux/patches/4.7-rc4/linux-056-add_Adaptec_eHome_Infrared_Receiver.patch
packages/linux/patches/4.7-rc4/linux-063-xpad-add-3rdparty-controllers.patch
packages/linux/patches/4.7-rc4/linux-223-Fix-video-artifacts-with-tt-3600-s2-usb.patch
packages/linux/patches/4.7-rc4/linux-230-elgato-eyetv-sat-v3.patch

The following patch is no longer compatible - it may have been included in a different way, or needs to be updated, but currently doesn't apply:

projects/Generic/patches/linux/linux-030-BYT-CHT-SOC-audio-support.patch

[popcornmix]

Pi config options look fine for me. Only difference with raspbian kernel is I chose CONFIG_NMI_LOG_BUF_SHIFT=12 but I'm happy with either setting.

[MilhouseVH]

CONFIG_TRIM_UNUSED_KSYMS=y breaks Generic, resulting in numerous unset symbols in various drivers:

[    8.869908] snd_hda_intel: Unknown symbol snd_hdac_bus_enter_link_reset (err 0)
[    8.869924] snd_hda_intel: Unknown symbol azx_probe_codecs (err 0)
[    8.869944] snd_hda_intel: Unknown symbol azx_init_streams (err 0)
[    8.869980] snd_hda_intel: Unknown symbol azx_stop_all_streams (err 0)
[    8.869988] snd_hda_intel: Unknown symbol snd_hdac_bus_free_stream_pages (err 0)
[    8.869995] snd_hda_intel: Unknown symbol snd_hdac_bus_exit (err 0)
...
[    8.957673] rt2800pci: Unknown symbol rt2x00mmio_uninitialize (err 0)
[    8.957686] rt2800pci: Unknown symbol rt2x00mac_sw_scan_complete (err 0)
...
[    9.515297] nvidia: Unknown symbol cpufreq_get (err 0)
[    9.515312] nvidia: Unknown symbol set_memory_uc (err 0)
[    9.515322] nvidia: Unknown symbol drm_open (err 0)

etc., and a non-functional xorg (and probably other drivers).

Since this seems to be an inappropriate setting for Generic I've disabled it on RPi/RPi2 too, even though they seemed fine without it (but maybe would fail later when loading overlays etc.).

With this change RPi, RPi2 and Generic (Revo3700/ION2) are all booting and apparently running normally with 4.7-rc4.

Here's some background on this option: https://lwn.net/Articles/679934/

Size differences with this option enabled/disabled (Generic build):

CONFIG_TRIM_UNUSED_KSYMS=y
-rw-r--r--  1 neil neil  11451648 Jun 24 02:41 kernel.img
-rw-r--r--  1 neil neil 213987328 Jun 24 02:41 SYSTEM

# CONFIG_TRIM_UNUSED_KSYMS is not set
-rw-r--r--  1 neil neil  11501248 Jun 24 03:23 kernel.img
-rw-r--r--  1 neil neil 214188032 Jun 24 03:23 SYSTEM

A modest increase of 250KB by disabling this option (in return for a working system!)

[MilhouseVH]

4.7-rc4 test build #0623x: RPi, RPi2, Generic

[piotrasd]

projects/Generic/patches/linux/linux-030-BYT-CHT-SOC-audio-support.patch

New patch will available after relase final kernel 4.7 :( so on RC stage no update for now .

[MilhouseVH]

Updated to 4.7-rc5.

[MilhouseVH]

Updated to 4.7-rc6.

[MilhouseVH]

Bump RTL8812AU driver to fix hard lock on RPi2.

[MilhouseVH]

Updated to 4.7-rc7.

[MilhouseVH]

Updated to 4.7.0 release.

Will add updated RPi kernel commits and firmware once @popcornmix has had a chance to rebase the rpi-4.7.y branch.

[MilhouseVH]

Updated with RPi/RPi2 patches and firmware.

Mirror (web03) needs updating with new 4.7 source tarball and bcm2835 mkpkg in order for anyone to build - I don't have access.

I'll include this PR in my test builds (as I have been for the last month), I'll remove "Don't Merge" label on Wednesday assuming there are no issues.

[MilhouseVH]

Mirror updated with4.7 tarball and latest firmware.

@piotrasd Are there any 4.7 audio patches for Cherrytrail?

[lrusak]

The audio patches haven't been rebased yet. We can add them later.

how close are we to merging this?

[MilhouseVH]

how close are we to merging this?

Personally I think it's ready to go - I see no point continuing with 4.6.x.

There is this conversation raspberrypi/linux@3a4a43e#comments - assuming clivem doesn't respond with any changes then I think we can merge as-is, otherwise I can force push (or if you've already merged I'll push another PR). I'd suggest waiting until Thursday to merge.

[MilhouseVH]

Forgot we need to install the new libbrcmEGL/libbrcmGLESv2 libraries with latest firmware. See raspberrypi/firmware#625.

We create symbolic links for the old libraries for backward compatibility.

[MilhouseVH]

Updated with fix for IR autorepeat - thanks @HiassofT

[MilhouseVH]

Updated with an i915/ Valley View patch that I've been using since #520 and which may fixe some display problems.

That's pretty much the last of the commits I've been carrying around in my builds... this should be good to go now.

[lrusak]

@MilhouseVH can you update the date of the commits?

git rebase --ignore-date upstream/master

then force push

[MilhouseVH]

Done!

[piotrasd]

@piotrasd Are there any 4.7 audio patches for Cherrytrail?

Not yet :( i will let you know

[MilhouseVH]

Kodi libEGL/libGLESv2 build failures are fixed by #592.