ASRock J5005-ITX

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Introduction

The board is well named: it is a mini-ITX board, with an on-board Intel J5005 CPU. The CPU has a passive cooler mounted on top. The J5005 has integrated graphics, capable of running 4k at 60 Hz over HDMI 2.0. There are two SO-DIMM memory slots allowing for dual lane memory access. The board has 4 SATA-3 6 GB/s ports to connect HDDs or SSDs. More specifications can be found at ASRock's website.

Reasons to build a rig using this board could be the combination of:

  • Low power CPU with 10 W TDP: if placed in a spacious enough case then it can be run fanless
  • A CPU with SSSE3, and AES instructions, perfect for fast disk encryption, vpn connections, and encrypted wireless
  • An optical S/PDIF port allows for digital connection to an external audio amplifier
  • 4 SATA-3 ports provide plenty of storage opportunity
  • Capable of 4k graphics: good for HTPCs
  • Small ITX form factor

Hardware

Device Make/model Status Bus ID Kernel driver(s) Kernel version Notes
CPU Intel J5005 Works N/A N/A 5.4.18 Goldmont Plus microarchitecure
Video Intel HD Graphics 605 Works 00:02.0 i915 5.4.18 Integrated graphics
Audio Intel Device 3198 Works 00:0e.0 snd_hda_intel 5.4.18 Realtek ALC892 Audio Codec
SATA controller Intel Device 31e3 Works 00:12.0 ahci 5.4.18 2 x SATA3 6.0 Gb/s
SATA controller ASMedia ASM1062 Works 04:00.0 ahci 5.4.18 2 x SATA3 6.0 Gb/s
Ethernet Realtek RTL 8111H Works 03:00.0 r8169 5.4.18 Gigabit LAN 10/100/1000 Mb/s
SMBus ASMedia ASM1062 Not tested 00:1f.1 i801_smbus, i2c_i801 5.4.18

The board also sports

  • 1 M.2 Key E interface, meant for a wireless card
  • 1 x PCI Express 2.0 x1 Slot


Installation

The installation is per the Gentoo AMD64 handbook.

Some specific configuration options are:

  • If sys-kernel/gentoo-sources is emerged with the "experimental" USE flag, then it is possible to set the processor family to "Intel Goldmont Plus"
  • Enable the kernel modules for encryption using SSE3 and AES instructions, see Iwd for an example of the options to enable
  • Intel graphics, configuring the drivers for generation 9
  • USB support, configuring xHCI, EHCI, and UHCI
  • Audio according to ALSA and optionally PulseAudio. Make sure to enable build Realtek HD-audio codec support

Kernel configuration

CPU

Intel J5005:

  • marketing name: Intel® Pentium® Silver J5005 Processor
  • code name: Gemini Lake
  • architecture: Goldmont plus


KERNEL CPU
[*] 64-bit kernel 
    Processor type and features  ---> 
        [*] Intel Low Power Subsystem Support 
        -*- Intel SoC IOSF Sideband support for SoC platforms 
            Processor family (Intel Goldmont Plus)  --->
        (4) Maximum number of CPUs
        [*] Multi-core scheduler support
        [*] Machine Check / overheating reporting 
        [*] CPU microcode loading support
        [*]   Intel microcode loading support
        <*> /dev/cpu/*/msr - Model-specific register support
        <*> /dev/cpu/*/cpuid - CPU information support
    Power management and ACPI options  --->  
        CPU Frequency scaling  ---> 
            Default CPUFreq governor (performance)  --->  
            -*-   'performance' governor
        [*] Intel P state control
    [*] Cpuidle Driver for Intel Processors 
-*- Cryptographic API  ---> 
    <M> Parallel crypto engine
    <*> CRC32c INTEL hardware acceleration 
    <M> SHA1 digest algorithm (SSSE3/AVX/AVX2/SHA-NI)
    <M> SHA256 digest algorithm (SSSE3/AVX/AVX2/SHA-NI)
    <M> SHA512 digest algorithm (SSSE3/AVX/AVX)
    <*> AES cipher algorithms (AES-NI)
    <M> Triple DES EDE cipher algorithm (x86-64)

PCI Express

KERNEL PCI Express
Device Drivers --->
    [*] PCI support  ---> 
        [*] PCI Express Port Bus support
        [*]   PCI Express Advanced Error Reporting support 
Bus options (PCI etc.)  --->
    [*] Support mmconfig PCI config space access


Storage controllers

Select "AHCI SATA support" module.

KERNEL Storage controllers
Device Drivers --->
    <*> Serial ATA and Parallel ATA drivers (libata)  --->
        [*] ATA ACPI Support
        <*> AHCI SATA support


Video

The integrated video is Intel Gen 9.

KERNEL Video
Device Drivers --->
    Graphics support  --->
    <M> /dev/agpgart (AGP Support)  --->
        <M> Intel 440LX/BX/GX, I8xx and E7x05 chipset support
    <M> Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)  --->
        [*] Enable legacy fbdev support for your modesetting driver
    <M> Intel 8xx/9xx/G3x/G4x/HD Graphics
        [*] Always enable userptr support

The required firmware is loaded automatically when the i915 driver is built as a module.

Provide configuration options for the i915 driver to enable functions of the Graphics micro (µ) Controller (GuC), the HEVC/H.265 micro (µ) Controller (HuC), as well as framebuffer compression (see here, and here for details):

FILE /etc/modprobe.d/i915.conf
options i915 enable_fbc=1 enable_guc=2

Note that enable_guc shows the kernel as tainted:

root #dmesg | grep -iE "huc|guc|dmc|i915|drm"
[    3.770822] Setting dangerous option enable_guc - tainting kernel
[    3.771670] i915 0000:00:02.0: vgaarb: deactivate vga console
[    3.771758] [drm] couldn't get memory information
[    3.771760] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    3.771760] [drm] Driver supports precise vblank timestamp query.
[    3.771831] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    3.772438] [drm] Applying Increase DDI Disabled quirk
[    3.772617] mei_hdcp 0000:00:0f.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
[    3.775721] [drm] Finished loading DMC firmware i915/glk_dmc_ver1_04.bin (v1.4)
[    4.910767] [drm] failed to retrieve link info, disabling eDP
[    4.925196] [drm] GuC communication enabled
[    4.930132] i915 0000:00:02.0: GuC firmware i915/glk_guc_33.0.0.bin version 33.0 submission:disabled
[    4.930134] i915 0000:00:02.0: HuC firmware i915/glk_huc_ver03_01_2893.bin version 3.1 authenticated:yes
[    4.931417] [drm] Initialized i915 1.6.0 20190822 for 0000:00:02.0 on minor 0
[    4.933150] snd_hda_intel 0000:00:0e.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[    4.969752] fbcon: i915drmfb (fb0) is primary device
[    5.151377] i915 0000:00:02.0: fb0: i915drmfb frame buffer device

Sound

KERNEL Sound
Device Drivers --->
    <M> Sound card support  --->
        <M> Advanced Linux Sound Architecture --->
            <*> PCI sound devices --->
                HD-Audio  --->
                <M> Build Realtek HD-audio codec support
                <M> Build HDMI/DisplayPort HD-audio codec support


USB

KERNEL USB
Device Drivers --->
    [*] USB support --->
        <*> Support for Host-side USB
        <M> xHCI HCD (USB 3.0) support 
        <M> EHCI HCD (USB 2.0) support 
        <M> UHCI HCD (most Intel and VIA) support


Network

KERNEL Ethernet
Device Drivers --->
    [*] Network device support --->
        [*] Ethernet driver support  --->
        [*] Realtek devices
            <M> Realtek 8169/8168/8101/8125 ethernet support


Intel MEI

KERNEL MEI
Device Drivers --->
    Misc devices  --->
        {M} Intel Management Engine Interface 
        {M} ME Enabled Intel Chipsets 
        <M> Intel HDCP2.2 services of ME Interface


Sensors

Next to the standard Intel core temperature sensor, the board also contains a a Nuvoton NCT6796D Super I/O chip, which can be used for monitoring and fan control.

KERNEL Sensors
Device Drivers --->
    <*> Hardware Monitoring support  --->
        <M> Intel Core/Core2/Atom temperature sensor
        <M> Nuvoton NCT6775F and compatibles


SMBus

KERNEL SMBus
Device Drivers --->
    I2C support  --->
        {*} I2C support
        [*]   ACPI I2C Operation region support
        <M>   I2C device interface  
        [*]   Autoselect pertinent helper modules
              I2C Hardware Bus support  --->   
              <M> Intel 82801 (ICH/PCH)

Portage make.conf

Many options of Gentoo are set in /etc/portage/make.conf. Some of the key aspects are:

FILE /etc/portage/make.conf
CFLAGS="-march=goldmont-plus -O2 -pipe"
CXXFLAGS="${CFLAGS}
VIDEO_CARDS="intel i965"
CPU_FLAGS_X86="aes mmx mmxext pclmul popcnt sha sse sse2 sse3 sse4_1 sse4_2 ssse3"