On Wed, Feb 17, 2016 at 04:41:04PM -0200, Fabio Estevam wrote: > On Wed, Feb 17, 2016 at 4:06 PM, Laszlo Fiat <laszlo.fiat@xxxxxxxxx> wrote: > > Hello, > > > > The SDIO wifi card is not detected in my Baytrail tablet with 4.5-RC kernels, > > which worked fine with pre-4.5 kernels. > > > > Kernel v4.0-4.4 versions worked nicely: > > > > $ grep mmc dmesg-4.4.0-rc2-next-20151127.txt > > [ 2.421329] mmc0: SDHCI controller on ACPI [80860F14:00] using ADMA > > [ 2.425847] mmc1: SDHCI controller on ACPI [INT33BB:00] using ADMA > > [ 2.431164] mmc2: SDHCI controller on ACPI [80860F14:02] using ADMA > > [ 2.561342] mmc0: MAN_BKOPS_EN bit is not set > > [ 2.569496] mmc0: new HS200 MMC card at address 0001 > > [ 2.571164] mmcblk0: mmc0:0001 032GE4 29.1 GiB > > [ 2.571453] mmcblk0boot0: mmc0:0001 032GE4 partition 1 4.00 MiB > > [ 2.571655] mmcblk0boot1: mmc0:0001 032GE4 partition 2 4.00 MiB > > [ 2.571863] mmcblk0rpmb: mmc0:0001 032GE4 partition 3 4.00 MiB > > [ 2.573835] mmcblk0: p1 p2 p3 p4 p5 p6 > > [ 2.647372] mmc1: new high speed SDIO card at address 0001 > > [ 2.812340] mmc2: new high speed SDXC card at address 0001 > > [ 2.812719] mmcblk1: mmc2:0001 00000 59.6 GiB > > > > With v4.5: > > > > $ grep mmc dmesg-4.5.0-rc4.txt > > [ 2.678828] mmc0: SDHCI controller on ACPI [80860F14:00] using ADMA > > [ 2.683332] mmc1: SDHCI controller on ACPI [INT33BB:00] using ADMA > > [ 2.705315] mmc2: SDHCI controller on ACPI [80860F14:02] using ADMA > > [ 2.850013] mmc2: new high speed SDXC card at address 0001 > > [ 2.858675] mmcblk0: mmc2:0001 00000 59.6 GiB > > [ 2.871384] mmc0: MAN_BKOPS_EN bit is not set > > [ 2.883166] mmc0: new HS200 MMC card at address 0001 > > [ 2.883725] mmcblk1: mmc0:0001 032GE4 29.1 GiB > > [ 2.884029] mmcblk1boot0: mmc0:0001 032GE4 partition 1 4.00 MiB > > [ 2.884322] mmcblk1boot1: mmc0:0001 032GE4 partition 2 4.00 MiB > > [ 2.884518] mmcblk1rpmb: mmc0:0001 032GE4 partition 3 4.00 MiB > > [ 2.886442] mmcblk1: p1 p2 p3 p4 p5 p6 > > > > Notice that the following line is missing with v4.5: > > > > mmc1: new high speed SDIO card at address 0001 > > > > And of course the out-of-tree wifi driver (rtl8723bs) cannot find the > > hardware with kernel v4.5. > > > > The hardware is a Teclast X80h Baytrail tablet. > > Cpu: Intel(R) Atom(TM) CPU Z3735F > > > > I've opened a bug report for it: > > https://bugzilla.kernel.org/show_bug.cgi?id=112571 > > > > The full dmesg of 4.5-rc4 is available in the bug report. > > I noticed the same on a imx6q-cubox-i board: the Broadcom Wifi chip > could not be detected with 4.5-rc. > > Haven't had a chance to debug this yet. Looks strange - my patch series was tested on Hummingboards and Armada38x, though that was before 4.4. The Hummingboards have the same Broadcom wifi chip(s) as the Cubox-i, and they worked fine with my original set patches - here's 4.4-rc6 on a Hummingboard: [ 0.000000] Linux version 4.4.0-rc6+ (rmk@xxxxxxxxxxxxxxxxxxxxxxx) (gcc version 4.7.4 (GCC) ) #1972 SMP Sat Jan 2 18:55:35 GMT 2016 [ 5.158107] brcmfmac: F1 signature read @0x18000000=0x16044330 [ 5.528484] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan 23 2013 17:47:32 version 5.90.195.114 FWID 01-f9e7e464 [ 5.567722] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code [ 5.629961] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code Since then, I rebased my patch series on 4.5-rc1 before re-posting it - though I didn't test it on the Wifi capable HBs, but now that I try, I find that there's more serious issues here: the SDHCI driver doesn't even probe the device, returning -ENODEV. So, something _else_ has broken in SDHCI/MMC for the Broadcom WIFI here - tracing through the code seems to point at the pwrseq stuff being the culpret: [ 52.175162] match->alloc failed: -517 [ 52.178874] sdhci-esdhc-imx 2190000.usdhc: mmc_of_parse failed: -517 [ 52.185271] sdhci-esdhc-imx 2190000.usdhc: imx probe failed -517 is -EPROBE_DEFER, and looking at what's in the clk_summary debugfs file, my guess is that the clk_sdio gpio-gate-clock is not being registered for some unknown reason. Adding Michael - any ideas why gpio-gate-clock has stopped working between 4.4 and present? -- RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
