[Gta04-owner] Replicant 4.2 development report

Lukas Maerdian luk at slyon.de
Thu Aug 7 12:55:41 CEST 2014


Thanks a lot for your great work!

I've now merged most of those commits into our tree, except for the
proper color handling in liblights, as this is a little different in our
implementation, due to Letux 3704 support. But from a quick comparison,
I'd say we're doing a pretty similar thing now, regarding the
GTA04/Letux 2804:
http://git.goldelico.com/?p=gta04-replicant-device.git;a=commit;h=84f349e2c6fdee6b62f5cfeaa03b036688f081fe

Also I've skipped most of the "continues splash screen" patches, as our
booting is a little different anyway and I don't want to introduce
Android specific commits into the bootloader.

Keep up the good work!
  Lukas

Am 26.06.2014 um 17:27 schrieb Paul Kocialkowski:
> A few things happened in Replicant development for the GTA04 lately.
> Here is a review of the recent commits I introduced to the upstream
> Replicant flavor, with some explanation for some of these.
> 
> My primary focus was to get the GTA04 ready for the next batch of
> Replicant images, correcting glitches and giving details some attention.
> Mostly, the biggest totally useless features I wanted is continuous
> splash screen: as you know, the screen is reset a few times and the
> splash screen from u-boot dies out pretty early. I wanted to correct
> that and have the same image up to the Replicant logo, as mainstream
> phones do.
> 
> So the GTA04 will have upstream Replicant images (as well as the usual
> jazz around it, installation guide, build guide, etc) as soon as the
> next release is ready to go. This should hopefully be somewhere during
> next week. That's important because the 15th Libre Software Meeting
> takes place in Montpellier, France the following week, and I want the
> release ready then. I will attend from Monday to Friday to take part in
> a Free Your Android Week workshop (dedicated to freedom on mobile
> devices more than Android) as well as present various talks about
> Replicant and freedom on ARM devices.
> Of course, I'll bring my GTA04 there and will be very happy to show it
> around. Generally speaking, it'll be a good time to meet with other free
> software enthusiasts, so you're all welcome to come and say hi! More
> details about that event on the Replicant blog[0].
> 
> Regarding the changes I brought over the last few weeks, the biggest
> thing is Bluetooth support, which is incomplete and broken because it
> uses Broadcom's BlueDroid, which is now the standard in Android >= 4.2.
> LWN holds a few articles explaining more about that transition.
> Basically, there are two approaches to get Bluetooth working here:
> * Use BlueZ instead of BlueDroid
> * Fix BlueDroid to work with the GTA04's CSR chip
> 
> I have decided to go with the second option (even though Bluetooth is
> not an immediate priority, so it'll likely stay broken for some time).
> The reasons for this decision are the following:
> * upstream BlueZ currently only supports Android 4.4 ans has no
> backwards compatibility with Android 4.2, so we'd have to fork it and
> implement back the Android 4.2 interface, which is a lot of work and can
> be a headache. I have tried for an afternoon and decided to give up.
> * BlueDroid doesn't work well with CSR chips, but the basics are here:
> it implements the HCI H4 protocol used by the chip and can successfully
> get it to become discoverable, scan other devices and pair with them,
> but file transfer and A2DP didn't work, even though in A2DP, it
> correctly created the sink on the other end.
> 
> Now some comments about specific commits of interest (you might want to
> include other commits I don't mention too).
> 
> device/goldelico/gta04:
> 
> commit c3788198e2d1a1216f74a12358d3caf01f212f93
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Sat Jun 14 15:16:03 2014 +0200
> 
>     Media codecs config
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> 
> commit 6198c76b91db0e07e55b8ff27de40d41c72937c5
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Sat Jun 14 12:34:38 2014 +0200
> 
>     full_gta04.mk: Proper full base include
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr
> 
> This fixes a problem with audio_policy.conf: the old include of base
> rules included the emulator (goldfish) config which resulted in
> headphones not working. The media codecs thing is required since the
> emulator one is not included anymore.
> 
> commit 7d109e867b8f96dbfb3e9b31bacbf65f4f9ff88e
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Tue Jun 24 00:36:57 2014 +0200
> 
>     Bluetooth support, using BlueDroid
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> 
> Bluetooth support using BlueDroid here. This performs UART baudrate
> switch if necessary (change serial_init_speed to B115200 for GTA04A3).
> I could only test it the other way round (having 3000000 as init and
> 115200 as work). The Replicant release will have that set in stone, so
> it'll only work on GTA04A4 devices, but in the future, this will be set
> at run-time to support GTA04A3 as well.
> 
> commit 9e51e193f87aba3a386180b48c77ef4107abe8f5
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Tue Jun 24 13:49:26 2014 +0200
> 
>     Playback volumes boost to cope with noisy environments
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> 
> When using the GTA04 as a GPS in a car, I noticed the speakers volume
> was too low. Also, since the UI displays a warning when going above a
> certain level using headphones, I figured it wouldn't hurt to raise the
> headphones volume too. This makes the max volumes nearly as loud as the
> max volumes of the Nexus S (which I use as a reference).
> 
> commit 13066d8de9ae8456571e6640a37ea249b1147363
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Thu Jun 26 00:34:57 2014 +0200
> 
>     Continuous splash screen
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr
> 
> Necessary to have that continuous splash screen thing working. Not much
> is done here, this mostly gets rid of the previous splash.
> 
> commit e2359405dd96735749906e63ba64d3b13ec7764e
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Thu Jun 26 16:23:56 2014 +0200
> 
>     lights: Properly handle provided colors
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> 
> I am really confused about what I did here before. The code couldn't
> possible have worked since the bits were not shifted properly.
> 
> kernel/goldelico/gta04:
> 
> commit 8d080f5605c92508a73adcf45f872dd54312febb
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Thu Jun 26 00:25:35 2014 +0200
> 
>     OMAP PWM: Mux init platform data call
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> 
> commit d2a2a8046331d112010c3f8683d76dfca8e74d96
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Thu Jun 26 00:28:31 2014 +0200
> 
>     gta04: Deferred backlight pin mux to achieve continuous boot splash
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> 
> This is needed for the continuous boot splash thing. The problem was
> that GPIO57 gets disabled in the board file but PWM only gets enabled
> once this driver is loaded, so there is a 1-2 sec gap where the screen
> is black, which is what I wanted to avoid. This makes it possible to do
> the muxing right before enabling PWM, which removes the gap.
> 
> commit ded600f3b14fa491382c3c67d59e15351d5d4227
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Thu Jun 26 00:27:27 2014 +0200
> 
>     OMAP3 hwmod: No reset for DSS and GPIO2 to achieve continuous boot
> splash
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> 
> Resetting DSS turns the screen white after some ugly fade out. It
> doesn't seem very necessary since DSS works correctly without that
> reset. Not resetting GPIO2 ensures that the backlight GPIO is not set to
> 0 and hence doesn't cause any interruption in backlight. All that is
> needed for continuous splash screen.
> 
> bootable/bootloader/goldelico/gta04:
> 
> commit 085738b9a5b46aa3d9f0e4b4340446373d697f25
> Author: Paul Kocialkowski <contact at paulk.fr>
> Date:   Thu Jun 26 00:35:37 2014 +0200
> 
>     Continuous splash screen
>     
>     Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> 
> New splash screen using the OpenPhoenux logo instead of that ugly thing
> I made before.
> 
> [0]:
> http://www.replicant.us/2014/06/replicant-at-the-15th-libre-software-meeting-in-montpellier-france-this-july/
> 
> 
> 
> _______________________________________________
> Gta04-owner mailing list
> Gta04-owner at goldelico.com
> http://lists.goldelico.com/mailman/listinfo.cgi/gta04-owner
> 


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