#linux-exynos on 2014-12-23 — irc logs at freenode.irclog.whitequark.org

2014-05-14 17:51 Wizzup changed the topic of #linux-exynos to: This channel is logged: http://irclog.whitequark.org/linux-exynos | http://linux-exynos.org | http://lists.linux-exynos.org/listinfo/linux-exynos | https://github.com/linux-exynos

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11:10 <amitk> javier__: did you have a chance to look at the wifi on the cb2?

11:11 <amitk> that is the only thing that is stopping me from using the cb2 as my daily laptop

11:11 <javier__> amitk: I did and got it working on snow but I couldn't get it working on peach pit/pi

11:11 <amitk> javier__: same chip?

11:12 <javier__> amitk: no, but the needed DTS changes are similar

11:12 <javier__> amitk: this is my wip branch fwiw http://cgit.collabora.com/git/user/javier/linux.git/log/?h=wip/exynos/wifi

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11:12 <amitk> javier__: thanks, I'll play around to see if I can get it working over the holidays

11:14 <javier__> amitk: cool, the problem is that the dw_mmc driver is timing out when sending mmc commands

11:14 <javier__> "mmc_host mmc2: Timeout sending command (cmd 0x202000 arg 0x0 status 0x80202000)"

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11:15 <amitk> javier__: I'll try to get Ulf to look at it (helps to have the mmc maintainer working in the team) ;)

11:16 <javier__> amitk: it does indeed :)

11:16 <javier__> amitk: I found that this ugly workaround make the error to go away and at least the wifi chip is listed in /sys/bus/sdio but the wifiex driver hangs when trying to download the firmware to the chip

11:16 <javier__> amitk: http://paste.debian.net/plain/137831

11:17 <javier__> amitk: seems to be some timing issue but I've to admit to not be very familiar with mmc/sdio in general so having ulf to take a look would be great!

11:18 <javier__> amitk: btw, are the desktop images you are using for the cb2 public?

11:19 <amitk> javier__: no

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11:40 <javier__> amitk: one last comment about the wifi wip patches, I'm using some out-of-tree patches from Olof that adds power on sequencing support for sdio devices

11:43 <javier__> amitk: the downstream ChromiumOS kernel (and some mainline DTS) use a chain of faked fixed regulator just to toggle the GPIO on the right sequence

11:43 <javier__> but that does not work for the wifi chip in the cb2 because it also needs a reference clock (which was modelled in the downstream tree as a regulator instead of a clock driver)

11:44 <javier__> amitk: afaiu ulf is working on a generic support for mmc/sdio power on sequencing

11:45 <javier__> amitk: sorry for the spam but I thought that it may be interesting to share my findings with you :)

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11:52 <amitk> javier__: thanks for the background

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14:05 <BorgCuba> somebody with dwc2 gadget problems?

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