On 9/13/18 6:11 PM, Jakob Alvermark wrote:
On 9/13/18 12:13 AM, Marius Strobl wrote:
On Fri, Sep 07, 2018 at 04:52:12PM +0200, Jakob Alvermark wrote:
On 9/7/18 12:41 AM, Marius Strobl wrote:
On Thu, Sep 06, 2018 at 12:33:39PM +0200, Jakob Alvermark wrote:
Hi,
I discovered this by chance.
The SD card reader in my laptop has never worked, but now I
noticed it
does after suspending and resuming.
The controller is probed and attached on boot:
sdhci_acpi1: <Intel Bay Trail/Braswell SDXC Controller> iomem
0x90a00000-0x90a00fff irq 47 on acpi0
But nothing happens if I put a card in. Unless I suspend and resume:
mmc1: <MMC/SD bus> on sdhci_acpi1
mmcsd0: 32GB <SDHC SL32G 8.0 SN 19CD02C0 MFG 11/2014 by 3 SD> at mmc1
50.0MHz/4bit/65535-block
Then I can remove and replug cards and it seems to work just fine.
I believe that making SD card insertion/removal with the integrated
SDHCI controlers of newer Intel SoCs work out-of-the-box requires
support for ACPI GPE interrupts and ACPI GPIO events respectively to
be added to FreeBSD. Otherwise insertion/removal interrutps/events
aren't reported and polling the card present state doesn't generally
work as a workaround with these controllers either, unfortunately.
I'm not aware of anyone working on the former, though.
Polling the card present state happens to work one time after SDHCI
initialization with these controllers which is why a card will be
attached when inserted as part of a suspend/resume cycle (resume of
mmc(4) had some bugs until some months ago, which probably explains
why that procedure hasn't worked as a workaround for you in the past).
Inserting the card before boot, unloading/loading sdhci_acpi.ko or
triggering detach/attach of sdhci_acpi(4) via devctl(8) should allow
to attach a card, too.
If a card is inserted before booting it is not detected.
Removing and inserting card after boot is not detected unless I suspend
and resume.
After I have suspended and resumed once, cards are detected. Removals
and insertions are detected as they happen.
Okay, then you are seeing somewhat different behavior than I do. What
SoC model is this?
CPU: Intel(R) Pentium(R) CPU N3540 @ 2.16GHz (2166.73-MHz K8-class CPU)
Are you loading a GPIO controller driver such as
bytgpio(4) or chvgpio(4)? Doing so might be sufficient to kick ACPI
GPIO events into working but would be missing dependency information
between drivers (which might explain what you are experiencing if
sdhci_acpi1 attaches first) and some other bits to do it properly.
I have bytgpio_load="YES" in /boot/loader.conf
But I tried removing it, doesn't change the behavior.
With or without the bytgpio driver, inserting or removing cards is
only detected after a suspend/resume cycle of the computer.
Also, could you please try whether doing a suspend/resume cycle of
sdhci_acpi1 via devctl(8) only kicks the card detection into working?
That test should indicate whether the firmware plays a role in making
the latter work.
Tried that.
devctl suspend sdhci_acpi1
devctl resume sdhci_acpi1
Doesn't make any difference.
Also tried devctl disable/enable. No change.
Additional research:
After boot, before any suspend/resume:
From acpidump -d
Device (SDHC)
{
Name (_ADR, Zero) // _ADR: Address
Name (_HID, "80860F16") // _HID: Hardware ID
Name (_CID, "PNP0D40" /* SDA Standard Compliant SD Host
Controller */) // _CID: Compatible ID
Name (_DDN, "Intel(R) SD Card Controller - 80860F16") //
_DDN: DOS Device Name
Name (_UID, 0x03) // _UID: Unique ID
Name (RBUF, ResourceTemplate ()
{
Memory32Fixed (ReadWrite,
0x00000000, // Address Base
0x00001000, // Address Length
_Y04)
Interrupt (ResourceConsumer, Level, ActiveLow,
Exclusive, ,, )
{
0x0000002F,
}
GpioInt (Edge, ActiveBoth, SharedAndWake, PullNone, 0x2710,
"\\_SB.GPO0", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0026
}
GpioIo (Shared, PullDefault, 0x0000, 0x0000,
IoRestrictionInputOnly,
"\\_SB.GPO0", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0026
}
})
And indeed card detection is GPIO pin 38 (0x26):
No card:
gpioctl -l | grep "pin 38"
pin 38: 1 GPIO_S0_SC38<IN>
Card inserted:
gpioctl -l | grep "pin 38"
pin 38: 0 GPIO_S0_SC38<IN>
After suspend/resume card detection works:
mmc1: <MMC/SD bus> on sdhci_acpi1
mmcsd0: 32GB <SDHC SL32G 8.0 SN 19CD02C0 MFG 11/2014 by 3 SD> at mmc1
50.0MHz/4bit/65535-block
But pin 38 is always 1, regardless if a card is inserted or not:
gpioctl -l | grep "pin 38"
pin 38: 1 GPIO_S0_SC38<IN>
And 'acpidump -d' fails:
acpidump: RSDT entry 12 is corrupt
Any clue on what's going on here?
Jakob
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