Compiling the kernel for T100TAF

Compiling the kernel for T100TAF

I WAS ABLE TO GET WORKING EVERYTHING EXCEPT THE CAMERA:

• sound

• screen brightness

• multitouch touchpad

• bluetooth

• wifi

• rotation/brightness

• sensors

great work to all the community and a few dedicated intel devs

!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!!

ONLY PROCEED OF YOU OWN A T100TAF and HAVE ADVANCED LINUX KNOWLEDGE

I don’t guarantee that you will not fry your speakers or your device if you proceed…​

Everything works perfectly on mine.

!!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!!

TOUCHSCREEN:

• working perfectly in Gnome 3.22

SOUND:

• You need patches from this branch: https://github.com/plbossart/sound/commits/topic/v4.9-fixes

• you will also need the UCM files: https://github.com/plbossart/UCM/tree/master/bytcr-rt5640

  you need to copy the bytcr-rt5640 directory to /usr/share/alsa/ucm and use pulseaudio 4.0+

• you will have mono speaker sound, headphones sound, you will also have hdmi sound (beware cheap microhdmi cables do not have sound transport)

MULTITOUCH TOUCHPAD:

• you will need the t100 multitouch patch: https://github.com/Asus-T100/kernel/commit/14648d7c17454c1a109a3d391c331a5d405d810c

• and need to modify it for T100TAF: https://github.com/Asus-T100/kernel/commit/d770c0609ca52f7b7ae711c9edb3a703ee00a4d5

• you will need to reattach the dock when starting up to get it working

SCREEN BRIGHTNESS + POWER SAVING

• You will need shobhit’s set of patches + a patched DSDT. https://github.com/Asus-T100/kernel/commit/1fef1951d70bb5b6f99a1331f16404897bbd2cc1

• You can use my DSDT: https://github.com/Asus-T100/kernel/blob/linux-4.9.x/T100TAFdsdt.hex

• Change your kernel .config:

CONFIG_I2C_DESIGNWARE_CORE=y
CONFIG_I2C_DESIGNWARE_PLATFORM=y
CONFIG_I2C_DESIGNWARE_PCI=y
CONFIG_I2C_DESIGNWARE_BAYTRAIL=y

CONFIG_PWM_LPSS=y
CONFIG_PWM_LPSS_PCI=y
CONFIG_PWM_LPSS_PLATFORM=y

# CONFIG_STANDALONE is not set

CONFIG_ACPI_CUSTOM_DSDT_FILE="/PATH_TO_THIS_FILE/T100TAFdsdt.hex"
CONFIG_ACPI_CUSTOM_DSDT=y

or patch it yourself:

• Extract ACPI tables (as root):

# cat /sys/firmware/acpi/tables/DSDT > dsdt.dat

• Decompile:

iasl -d dsdt.dat

• open and find in dsdt.dsl

            Method (_STA, 0, NotSerialized)  // _STA: Status
            {
                If (((P10A == Zero) || (L11D == One)))
                {
                    Return (Zero)
                }

                If ((OSSL & 0x80))
                {
-                    Return (Zero)
+                    Return (0x0F)
                }

                Return (0x0F)
            }

• Recompile:

iasl -tc dsdt.dsl

• Use the generated *.hex in your kernel

SENSORS:

• For the brightness sensor you need this patch: https://github.com/Asus-T100/kernel/commit/ec48bca0b7e96996c5992160e932c27b27cfd722

• If you use Gnome 3.20 you can install iio-sensor-proxy and you will have auto brightness…​

• You can also use T100 scripts for auto brightness provided by this community

• i opted for the iio-sensor-proxy and i also have auto rotation in gnome…​

BLUETOOTH:

• You just need the HCD file and a command to enable it: https://github.com/Asus-T100/firmware/blob/master/brcm/BCM43341B0.hcd

• put the file in /lib/firmware/brcm/

# btattach --bredr /dev/ttyS4 -P bcm

could be on your system:

# btattach --bredr /dev/ttyS1 -P bcm

WIFI:

• needs only a txt file https://github.com/Asus-T100/firmware/blob/master/brcm/brcmfmac43340-sdio.txt

• put it in /lib/firmware/brcm/

PREPATCHED KERNEL:

• You can use my pre-patched kernel source

$ git clone https://github.com/Asus-T100/kernel.git
$ cd kernel
$ git checkout linux-4.9.x

• Be sure to use the linux-4.9.x branch (currently its stable)