<div dir="ltr"><div>I brought up BlueZ4 "harvesting" for Sailfish in this week's Mer Meeting:</div><div><br></div><div> <a href="http://merproject.org/meetings/mer-meeting/2014/mer-meeting.2014-09-09-15.00.html" target="_blank">http://merproject.org/meetings/mer-meeting/2014/mer-meeting.2014-09-09-15.00.html</a><br><div><br></div></div><div><div>Calling Hannu Mallat! I am told that you are "the guy" :-)<br></div><div><br></div><div></div></div>I am forwarding this earlier e-mail thread to the Sailfish development list, for archiving of the conversation, and so that Bluetooth developers on Mer/Sailfish/Jolla can have this additional context. Thanks!<div><div><br></div><div><div><br>Cheers,</div><div>Bob</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 29, 2014 at 4:22 AM, Bob Summerwill <span dir="ltr"><<a href="mailto:bob@summerwill.net" target="_blank">bob@summerwill.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">Thanks for the great summary, Javier.<div><br></div><div>I just realized that I never pulled in the authors who Mikko highlighted earlier in the chain, so I will do so now.</div><div><br></div><div>Remaining questions in my mind ...</div>
<div><br></div><div>1. Were the non-upstreamed changes to BlueZ 4 made in Tizen 2.x which would still have value in BlueZ 5 (and so for Tizen 3.x)? I don't know, but just wanted to throw that thought into Tizen-world. Somebody would need to audit that Tizen 2.x version against a vanilla BlueZ 4 and make a judgment call on that.</div>
<div><br></div><div>2. If BlueZ 5 is incomplete, I would assume that BlueZ 4 master is still being maintained? If so, it would be nice if Tizen could upstream changes which weren't hacks, so that other distros still using BlueZ 4 could benefit. That benefit would go beyond just mobile, right?</div>
<div><br></div><div>3. And then for Sailfish, it looks like we could just harvest Tizen changes into the Sailfish BlueZ 4 whether or not any upstreaming happens. Looks like Javier is entirely on the ball for that. He has mentioned asking who is the Bluetooth "person" for Sailfish at the next community meeting. So there is no further TODO for that. It is moot until Sailfish gets up to Qt 5.4.</div>
<div><br></div><div>Thanks, everyone!</div><div><br></div><div><br></div><div>Cheers,</div><div>Bob</div><div><br></div><div><br></div><div>Cheers,</div><div>Bob</div><span><div><br><div><br></div><div><div style="font-family:arial,sans-serif;font-size:12.5714282989502px">
7745-M: Taesoo Jun <<a href="mailto:steve.jun@samsung.com" target="_blank">steve.jun@samsung.com</a>></div><div style="font-family:arial,sans-serif;font-size:12.5714282989502px">7746-M: wu zheng <<a href="mailto:wu.zheng@intel.com" target="_blank">wu.zheng@intel.com</a>></div>
<div style="font-family:arial,sans-serif;font-size:12.5714282989502px">7747-M: Pyun DoHyun <<a href="mailto:dh79.pyun@samsung.com" target="_blank">dh79.pyun@samsung.com</a>></div></div></div></span></div><div class="gmail_extra"><div><div>
<br><br><div class="gmail_quote">On Tue, Aug 26, 2014 at 10:52 AM, Javier S. Pedro <span dir="ltr"><<a href="mailto:jolla@javispedro.com" target="_blank">jolla@javispedro.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<br>
Bob Summerwill <<a href="mailto:bob@summerwill.net" target="_blank">bob@summerwill.net</a>> escribió:<div><br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
Hey Javier,<br>
<br>
What was the non-upstreamed functionality you saw in Tizen 2.x?<br>
<br>
I guess that it may be the case that the additions were additions to BlueZ<br>
4 which were already present in BlueZ?<br>
<br>
Mikko - please could you confirm that Tizen 3.0 is using BlueZ 5? Is it<br>
a full BLE stack, as far as you are aware? Javier said ...<br>
<br>
<a href="https://twitter.com/javispedro/status/497161968508469248" target="_blank">https://twitter.com/<u></u>javispedro/status/<u></u>497161968508469248</a><br>
"Wow, Tizen folks went all the trouble to add full BLE support to Bluez4.<br>
Pairing, peripheral-role, advertising, everything."<br>
</blockquote>
<br></div>
Hello Bob,<br>
<br>
that message came from the source files from the Gear2 tarball:<br>
- bluez-4.101_39 contains a lot of patches (some guarded by #ifdef __TIZEN_PATCH__) that enabled many LE functionality (e.g. pairing, key exchanges using mgmtops, gatt server/client, advertising control, etc.).<br>
Apart from this there are some Tizen specific patches that are useless upstream (e.g. battery level reading).<br>
- linux-3.4-exynos3250-1.0 contains the required patches to enable the kernel side of this. Without them, the Bluetooth subsystem from 3.4 was way too old to handle most LE operations via mgmtops.<br>
They are enabled by Kconfig's CONFIG_TIZEN_WIP and CONFIG_TIZEN_RANDOM.<br>
<br>
Whether these are backports from Bluez5 and/or more recent kernels I don't know. I suspect the Bluez patches at least are a fork, because the current Bluez5 LE functionality comes, iirc, from a Google employee. So I do not think they are useful for upstreaming any longer.<br>
<br>
My point was that many systems are stuck with Bluez4, because of the API breakage that comes with Bluez5 means rewriting most of the platform BT support, and because some parts of Bluez5 are not ready yet (LE among others). Thus, enabling LE in Bluez4, keeping API compatibility, is very interesting. An example of such platform is Jolla Sailfish, but I suspect there are others (Ubuntu comes to mind).<br>
<br>
So while I don't think the Tizen changes are useful for upstreaming (might be wrong), they would still be useful for e.g. Sailfish as a temporary solution until Bluez5 support 'matures'.<br>
<br>
In fact, a future version of Qt will allow GATT even under Bluez4 by doing something similar to what gatttool does. Qt itself does not talk with Bluez5 yet.<span><font color="#888888"><br>
<br>
Javier.<br>
<br>
</font></span></blockquote></div><br><br clear="all"><div><br></div></div></div><span><font color="#888888">-- <br><a href="mailto:bob@summerwill.net" target="_blank">bob@summerwill.net</a><br><br>
</font></span></div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><a href="mailto:bob@summerwill.net" target="_blank">bob@summerwill.net</a><br><br>
</div></div></div>