Welcome to the wiki for the growing Linux development community around Amlogic Meson SoCs.

This community is focused around getting Meson SoCs well-supported by mainline Linux and mainline Linux distributions. Some work has been done to get Meson SoCs well-supported by mainline U-Boot as well, to provide Single-Board-Computers an U-Boot alternative to the heavily patched outdated version maintained by Amlogic.

In January 2018 BayLibre wrote a post that summarizes the work done so far to get Meson SoC support into mainline Linux: How We Improved AmLogic Support in Mainline Linux

This wiki is not endorsed by or affiliated with Amlogic, Inc.

• Our IRC channel is #linux-amlogic on Freenode
• Mailing list for Linux Development
• Mailing list for U-Boot Development

The Amlogic Upstream development looks for contributors, so don't hesitate to contact the other developers if you wish to fix, develop, enhance or test a feature in Linux, U-boot or any other software (There is OpenBSD support https://www.openbsd.org/arm64.html).

As we have a lot of work to do before we reach our goals, this wiki is not really suitable for end users yet - you will need a basic knowledge of Linux cross-compiling for ARM and embedded systems setup to use the information in this wiki towards using the latest linux Mainline kernel for supported Amlogic SoCs.

Instead, we use this wiki as an information archive for those developers who are working collaboratively to bring Amlogic support to the existing Linux/open-source codebases and communities.

You can find mainline Linux for Amlogic SoCs in these (non-exclusive) distributions list :

• Armbian (https://www.armbian.com) Switched to mainline Linux for all of the Amlogic SoC support images
• Generic ArchLinux ARM (https://archlinuxarm.org/platforms/armv8/generic) Uses mainline defconfig, thus enabling Amlogic SoC support, but you will need to setup the boot yourself
• Debian Testing (https://wiki.debian.org/DebianTesting) Uses a fairly recent Linux release with most of the needed Linux config options to run on Amlogic SoCs, you will be able to use EFI boot or you will need to setup the boot yourself
• openSUSE Tumbleweed (https://en.opensuse.org/HCL:LibreTech-CC) Uses a fairly recent Linux release with most of the needed Linux config options to run on Amlogic SoCs, you will be able to use EFI boot or you will need to setup the boot yourself as described in the Wiki
• Fedora Rawhide (https://fedoraproject.org/wiki/Architectures/ARM) Uses mainline defconfig, thus enabling Amlogic SoC support, but you will need to setup the boot yourself
• Yocto/OpenEmbedded meta-meson layer (https://layers.openembedded.org/layerindex/branch/master/layer/meta-meson/) Enables linux on Amlogic SoCs, including boot support, with most of the Work-In-Progress patches
• Buildroot (http://buildroot.org) Can build a set of rootfs, kernel and bootloader using mainline projects, but you will need to setup the boot yourself

Some Board Vendors provide images with mainline linux :

• Libre Computer images for AML-S905X-CC (http://share.loverpi.com/board/libre-computer-project/libre-computer-board-aml-s905x-cc/image)
• Khadas VIM Mainline Images:
  • https://docs.khadas.com/firmware/Vim1Firmware.html#mainline
  • https://docs.khadas.com/firmware/Vim2Firmware.html#mainline
  • https://docs.khadas.com/firmware/Vim3Firmware.html#mainline

Sadly HardKernel doesn't provide mainline based images themselves, but Armbian does.

Here is current status on Multimedia support :

• GPU : Is supported on S905, S905X/W/L, S905D, S805X, S912, S905X2, S905D2, S905X3, S905D3, A311D and S922X with Lima and Panfrost
  • Linux drivers upstream since v5.2
  • Mesa support in master : https://gitlab.freedesktop.org/mesa/mesa
  • Closed Source mali driver using https://github.com/superna9999/meson_gx_mali_450 driver and https://github.com/superna9999/amlogic-meson-mali binaires (The ARM provided HiKey binaries are also functional)
• HDMI Output up to 4k is working on S905, S905X/W/L, S905D, S912, S805X, S905X2, S905Y2, S905D2, S922X, A311D, S905X3, S905D3, S905Y3
• Video Decoding is being upstream, but still in Staging until the Statefull V4L2 M2M Interface is finalized, supports MPEG-2, H264 and VP9 decoding

All of this is being integrated in a specific LibreELEC branch at : https://github.com/LibreELEC/LibreELEC.tv/tree/amlogic and https://github.com/chewitt/LibreELEC.tv/tree/amlogic

Yes, we (BayLibre) pushed an upstream based AOSP support for the G12A/SM1 based boards :

• SEI510
• SEI610
• Khadas VIM3L
• Khadas VIM3

Current status (Oct 2020):

• Android 11 Bootflow using Mainline U-Boot
• Mali GPU using binary blobs
• Audio support (HDMI, analog, dmic)

Where ?

• https://android.googlesource.com/device/amlogic/yukawa/

Current upstreaming efforts are focused around the S905/S905D/S905X/S805X/S905W/S912/A113D/S905X2/S905D2/S905X3/S905D3/A311D/S922X SoCs (GXBB/GXL/GXM from the Meson GX family, AGX Family and the new G12A, G12B & SM1 Families). Secondarily there are also some efforts around the S805 SoC (Meson8b), and the AML8726-MX (Meson6) since they are widespread in many consumer products.

• Meson6 : Dual 32bit Cortex-A9
  • AML8726MX
• Meson8 : Quad 32bit Cortex-A9
  • S802
• Meson8b : Similar as Meson8 but with Quad 32bit Cortex-A5
  • S805
• Meson8m2 : Similar to Meson8 (same 10/100/1000 MAC as Meson8b, H.265 UHD hardware decoder)
  • S812
• GXBB : Quad 64bit Cortex-A53
  • S905
• GXL : Quad 64bit Cortex-A53
  • S905D : Similar as S905, but with internal 10/100 Ethernet PHY (Gigabit Ethernet still requires an external PHY)
  • S905X : Identical to S905D but without Gigabit Ethernet
  • S905W : Mostly identical to S905X, 1.2GHz CPU frequency, video decoders and HDMI are limited to 4K30P, the DDR interface is limited to 16-bit
  • S805X : Mostly identical to S905X, 1.2GHz CPU frequency, video decoders and HDMI are limited to 1080p60, the DDR interface is limited to 16-bit
• GXM : Identical to GXL but with Octo 64bit Cortex-A53
  • S912 : Pin compatible with S905D
• AXG : Audio/IOT dedicated SoC derived from GX family with enhanced audio and MIPI DSI display support and 2xPCIe 2.0 x1 lanes
  • A113D
  • A113X: similar to A113D, without PCIe and MIPI DSI Output
• G12A : Quad 64bit Cortex-A53, DSI Output
  • S905D2: enhanced audio (from AXG), 1x USB 3.0 or 1x PCIe 2.0, built-in 1G MAC and 100M PHY, two video decoders (4Kx2K@60fps + 1080P@60fps)
  • S905X2: similar to S905D2 but without DVB interface and DSI
  • S905Y2: similar to S905X2 but without built-in Ethernet
• G12B : Identical to G12A but with Quad Cortex-A73 + dual Cortex-A53 cores, with CSI input and ISP
  • S922X: mostly pin compatible with S905X2
  • A311D: similar to S922X but with slightly higher frequencies, with a Neural Processor Unit
• SM1 : Very close to G12A but with Quad Cortex-A55, a Neural Processor Unit and CSI input
  • S905D3: enhanced audio (from AXG), 1x USB 3.0 or 1x PCIe 2.0, built-in 1G MAC and 100M PHY, two video decoders (4Kx2K@60fps + 1080P@60fps), Neural Processor Unit, MIPI-DSI and CSI input
  • S905X3: similar to S905D3 but without the DSI output and CSI input
  • S905Y3: similar to S905X3 but without DVB interface and built-in Ethernet

For further indications : https://en.wikipedia.org/wiki/Amlogic#Comparison_table

Some development and final products are (partially) supported : Supported Hardware

v5.12 (work in progress)

• Clock Changes
  • pll driver fixup
  • meson8b clock controller dt support clean up
  • remove mipi clk from the axg clock controller
• ARM SoC drivers
• ARM64 DT
  • new board: Hardkernel ODROID-HC4 (SoC: SM1)
  • new board: Beelink GS-King-X (SoC: S922X)
  • shorten shorten audio card names for alsa compatibility
  • misc cleanups & fixes
• ARM DT
  • add thermal zones with cooling configuration
• ARM Kconfig
  • enable support for the ADC thermal sensor as module
• Other subsystems
  • tty: serial: meson: enable console as module

v5.11

• Clock Changes
  • Add MIPI DSI clocks for axg and g12
  • Make it possible to build controllers as modules
  • Fix Video PLL clock dependency
• ARM SoC drivers
  • enable building as modules
  • reset API updates
• ARM64 DT
  • AXG SoCs: add/enable PCIe & USB OTG support
  • AXG SoCs: add MIPI DSI support
  • Khadas VIM: add RTC
  • several cleanups & fixups
• ARM DT
  • audio support for several more boards
  • PHY timing fixes
• ARM64 Kconfig
  • ship only the necessary clock controllers
• Other subsystems
  • Add support for the Amlogic 2D Accelerator on AXG
  • Add AXG MIPI D-PHY driver on AXG
  • Add MIPI DSI support on the AXG PCI/MIPI Analog driver

v5.10

• PCI: meson: Build as module by default
• usb: dwc-meson-g12a: Add support for USB on AXG SoCs
• dt-bindings: usb: amlogic,meson-g12a-usb-ctrl: add the Amlogic AXG Families USB Glue Bindings
• usb: dwc3: meson: fix checkpatch errors and warnings
• dt-bindings:iio:adc:amlogic,meson-saradc yaml conversion
• drm/panfrost: add Amlogic GPU integration quirks
• arm64: dts: meson: initial support for aml-s905x-cc v2
• arm64: dts: meson: add support for the ODROID-N2+
• arm64: dts: meson: convert ODROID-N2 to dtsi
• soc: amlogic: meson-ee-pwrc: add support for the Meson AXG SoCs
• dt-bindings: power: amlogic, meson-ee-pwrc: add Amlogic AXG power controller bindings
• clk: meson: axg-audio: fix g12a tdmout sclk inverter
• clk: meson: add sclk-ws driver
• arm64: dts: meson: vim3: make sound card common to all variants

v5.9

• i2c: meson: fixup rate calculation with filter delay
• i2c: meson: fix clock setting overwrite
• ASoC: meson: cards: deal dpcm flag change
• arm64: dts: meson: odroid-n2: add jack audio output support
• arm64: dts: amlogic: meson-gx: add the Mali-450 OPP table and use DVFS
• arm64: dts: meson: add support for the WeTek Core 2
• arm64: dts: meson: add audio playback to khadas-vim3l
• arm64: dts: meson: add audio playback to odroid-c4
• crypto: amlogic-gxl - permit async skcipher as fallback
• ARM: dts: meson: add the SDHC MMC controller
• arm64: dts: meson-gx: Switch to the meson-ee-pwrc bindings
• ARM: dts: meson8b: add power domain controller
• ARM: dts: meson8m2: add resets for the power domain controller
• ARM: dts: meson8: add power domain controller
• clk: meson: meson8b: add the vclk2_en gate clock
• clk: meson: meson8b: add the vclk_en gate clock
• pinctrl: meson: fix drive strength register and bit calculation
• drm/meson: crtc: handle commit of Amlogic FBC frames
• drm/meson: overlay: setup overlay for Amlogic FBC
• net: stmmac: dwmac-meson8b: use clk_parent_data for clock registration
• drm: meson: dw-hdmi: Use dw_hdmi context to replace hack
• net: stmmac: dwmac-meson8b: add a compatible string for G12A SoCs
• dt-bindings: net: dwmac-meson: Add a compatible string for G12A onwards
• drm/meson: Set GEM CMA functions with DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE

v5.8

• drm/meson: viu: fix setting the OSD burst length in VIU_OSD1_FIFO_CTRL_STAT
• arm64: dts: meson-gxl-s805x: reduce initial Mali450 core frequency
• mmc: meson-mx-sdhc: Fix building with CONFIG_MMC_MESON_MX_SDHC=m
• mmc: host: meson-mx-sdhc: new driver for the Amlogic Meson SDHC host
• mmc: meson-mx-sdio: trigger a soft reset after a timeout or CRC error
• phy: amlogic: meson-gxl-usb3: remove code for non-existing PHY
• arm64: dts: amlogic: use the new USB control driver for GXL and GXM
• usb: dwc3: meson-g12a: add support for GXL and GXM SoCs
• arm64: dts: meson-g12b-gtking-pro: add initial device-tree
• arm64: dts: meson-g12b-gtking: add initial device-tree
• arm64: dts: meson: convert ugoos-am6 to common w400 dtsi
• arm64: dts: meson: add support for the Smartlabs SML-5442TW
• arm64: dts: meson-sm1: add support for Hardkernel ODROID-C4
• arm64: dts: meson: libretech-pc: add initial audio playback support
• arm64: dts: meson: libretech-ac: add initial audio playback support
• arm64: dts: meson: libretech-cc: add initial audio playback support
• arm64: dts: meson: p230-q200: add initial audio playback support
• soc: amlogic: meson-ee-pwrc: add support for the Meson GX SoCs
• soc: amlogic: meson-ee-pwrc: add support for Meson8/Meson8b/Meson8m2
• phy: amlogic: meson8b-usb2: Add a compatible string for Meson8m2
• phy: amlogic: meson8b-usb2: Don't set REG_ADP_BC_ACA_ENABLE on Meson8
• phy: amlogic: meson8b-usb2: Use a MMIO regmap
• dt-bindings: phy: meson8b-usb2: Add compatible string for Meson8m2
• dt-bindings: phy: meson8b-usb2: Convert to json-schema
• net: stmmac: dwmac-meson8b: add support for the RX delay configuration
• net: stmmac: dwmac-meson8b: Make the clock enabling code re-usable
• drm/meson: add mode selection limits against specific SoC revisions
• clk: meson: meson8b: Don't rely on u-boot to init all GP_PLL registers
• arm64: dts: meson-gxbb-kii-pro: fix board compatible
• arm64: dts: meson: fixup SCP sram nodes
• clk: meson: meson8b: Fix the polarity of the RESET_N lines
• clk: meson: meson8b: Fix the first parent of vid_pll_in_sel
• dt-bindings: sram: Add Amlogic SCP SRAM compatibles

v5.7

• Update audio clock gate hierarchy for meson8 and gxbb
• Update g12a spicc clock sources
• spicc: Add support for G12A
• A1: Add secure power domain controller
• Add VP9 HW decoder
• DT updates:
  • fix gxm-khadas-vim2 wifi
  • odroid-c2: add rc-odroid ir keymap
  • p212: add bluetooth nodes
  • s95: fix bluetooth node
  • g12b: fix N2/VIM3 audio card model names
  • khadas-vim3: move model to g12b-khadas-vim3 dtsi
  • add thermal zones to meson gx devices
  • add pdm reset line
  • s400: fix sound card codec nodes
  • sei510: fix sound card codec node
  • a1: add secure power domain controller
  • add rc-videostrong-kii-pro keymap
  • g12-common: add parkmode_disable_ss_quirk on DWC3 controller
  • g12-common: add spicc controller nodes
  • g12: split emmc pins to select 4 or 8 bus width
  • g12: add the SPIFC nodes
  • khadas-vim3: add SPIFC controller node
  • g12b-odroid-n2: add SPIFC controller node

v5.6

• irqchip/meson-gpio: Add support for meson a1 SoCs
• add reset controller for Meson-A1 SoC
• a1: add pinctrl controller support
• add libretech-pc boards support
• meson-gxbb: add support for Videostrong KII Pro
• vdec: add sm1 platform
• vdec: add g12a platform
• add a driver for the Meson8/8b/8m2 DDR clock controller

v5.5

• drm/meson: add support for suspend/resume
• GXL/GXM: add a driver for the HW crypto IP block
• G12A/G12B/SM1: Add thermal zone support
• G12A/G12B/SM1: add PCIe support
• DT updates:
  • A1: initial SoC support
  • G12A/G12B/GX/SM1: keep the wifi module enabled in suspend (so it can wake up the board)
  • G12A/G12B/SM1: enable thermal zone support
  • G12A/G12B/SM1: enable PCIe support
  • G12A/G12B: add simplefb support
  • GXBB: add more regulators for Odroid-C2
  • GXL/GXM: enable the HW crypto accelerator
  • SM1: add audio support
  • SM1: enable audio on SEI610
• New board support
  • Amlogic AD401 (A1)
  • Ugoos AM6 (G12B, S922X)

v5.4

• G12B: add the SoC ID for the A311D SoC
• G12B: add support for the second CPU cluster in the meson-clk-measure driver
• G12A/G12B: make the CPU clock trees mutable
• DT updates:
  • G12A/G12B: use a common .dtsi for both SoCs
  • G12A/G12B: add the pwm_a pin (used for the CPU voltage regulator)
  • G12A/G12B: use the correct Ethernet FIFO sizes
  • G12A: add the CPU OPP table
  • G12B: add the CPU OPP table
  • G12A: enable CPU DVFS (dynamic voltage and frequency switching)
  • G12B: add the CPU OPP table
  • G12B: enable CPU DVFS (dynamic voltage and frequency switching)
  • GX: use the correct Ethernet FIFO sizes
  • GX: add the video decoder
  • Meson8b: use the correct Ethernet FIFO sizes
  • Meson8b: add the VDDEE (GPU and other parts of the SoC) regulator on all supported boards
  • Meson8b: use the Ethernet MAC address from the eFuse on Odroid-C1
• New board support
  • Khadas VIM3 (G12B, S922X or A311D)
  • Khadas VIM3L (SM1, S905D3)
  • SEI Robotics SEI610 (SM1, S905X3)

v5.3

• all SoCs: PWM driver improvements
• AXG: move spread spectrum to MPLL2
• G12A: add support for thetohdmitx audio controller
• G12A: fix the name of the MPLL 50M clock ID
• G12A: initialize MPLL registers correctly
• G12A: add drive-strength-microamp support in the pinctrl driver
• G12B: add support for the second CPU cluster clocks
• G12A/G12B: add support for the thermal sensor clock
• G12A/G12B: add GPIO IRQ support
• G12A/G12B: use interrupt based OTG switching
• GX: add support for the XBGR8888 and ABGR8888 color formats
• GXBB: remove incorrect spread spectrum on MPLL0
• Meson8/Meson8b/Meson8m2: add support for the audio clocks
• Meson8/Meson8b/Meson8m2: add support to the canvas video lookup-table
• DT updates:
  • G12A: add the PWM controllers
  • G12A: add the IR decoder
  • G12A: enable the IR decoder on the U200 and X96 Max boards
  • G12A: add the SD and eMMC controllers
  • G12A: enable SD card and eMMC on the U200 and SEI510 boards
  • G12A: add clocks to the AO UART controllers
  • G12A: add the I2C busses
  • G12A: enable the I2C bus with the RGB LED controller on SEI510
  • G12A: add the audio controllers
  • G12A: add the Ethernet controller and MDIO mux
  • G12A: enable the internal PHY on the U200 and SEI510 boards
  • G12A: add the SDIO controller
  • G12A: enable the SDIO WiFi module on the X96 Max and SEI510 boards
  • G12A: enable Bluetooth on the X96 Max and SEI510 boards
  • G12A: enable the SDIO MMC controller and enable wifi on supported boards
  • G12A: enable audio support on the X96 Max
  • G12A: enable audio support on the SEI510
  • G12B: add support for the S922X SoC
  • G12B: minimal support for the Odroid-N2
  • G12B: enable audio support on the Odroid-N2
  • G12A/G12B: add the Ethernet controller and enable it on all supported boards
  • G12A/G12B: add the GPIO interrupt-controller
  • G12A/G12B: switch to (GPIO) interrupt driven PHY status updates
  • G12A/G12B: enable the RNG
  • GX: fix eMMC pin bias and set max-frequency
  • GXBB: add more supported SD card modes on Odroid-C2 and NanoPi K2
  • GXBB: enable Bluetooth on the Wetek boards
  • GXBB: fix reading the chip temperature on some Wetek boards
  • GXBB: enable HDMI CEC on the Tronsmart Vega S95 boards
  • GXBB: fix reading the chip temperature on some Tronsmart Vega S95 boards
  • GXBB: add Bluetooth support on the Tronsmart Vega S95 boards
  • GXBB: use an interrupt instead of polling the Ethernet PHY status on the Tronsmart Vega S95 boards
  • GXL: correct eMMC module voltage and mark it as removable on Libretech CC
  • GXM: update eMMC settings for Khadas VIM2
  • GXM: enable Bluetooth on the Khadas VIM2
  • Meson8b: improve support for the Tronfy MXQ S805
  • Meson8/Meson8b/Meson8m2: add the canvas video lookup-table
  • Meson8m2: add the mali-supply on the MXIII-Plus board
• New board support
  • Hardkernel Odroid-N2 (G12B, S922X)

v5.2

• G12A: add CPU clocks (read-only for now)
• G12A: add the PCIe PLL clocks
• G12A: new USB2 PHY driver
• G12A: new PCIe / USB3 combo PHY driver
• G12A: add G12A SoC support in the SAR ADC driver
• G12A: support for the internal PHY
• G12A: new MDIO mux driver
• G12A: support for G12A in the ASoC drivers for AXG
• G12A: support for the audio clock controller
• G12A: support for the USB control IP
• G12A: support for the peripheral-only dwc2
• G12A: support in the PWM controller driver
• Meson GX/AXG MMC: clean-ups and clock phase tuning updates
• Meson8/Meson8b/Meson8m2: support for the VDEC clocks
• Meson8/Meson8b/Meson8m2: support for the VPU clocks
• DT updates
  • G12A: add the secure monitor
  • G12A: add the eFuse
  • G12A: add the AO clock and reset controller
  • G12A: add the AO and EE pin controllers
  • G12A: add the reset controller
  • G12A: add HDMI and CVBS video outputs
  • G12A: add the HDMI CEC controllers
  • G12A: add the SAR ADC
  • G12A: add the Mali-G31 GPU
  • G12A: prepare USB support
  • G12A: add regulators for various boards
  • G12A: enable the Bluetooth module on X96 Max
  • GXM: add the Mali-T820 GPU
  • GXM: enable USB on the Nexbox A1
  • Meson8b: gpio-line-names for Odroid-C1
  • Meson8b: enable the RTC on EC-100
  • Meson8b: prepare support for the RTC on Odroid-C1
  • Meson8/Meson8b: enable the clock measurer
• New board support
  • SEI Robotics SEI510 (G12A, S905X2)

v5.1

• clkmsr: add support for AXG and G12A in the “clock measurer” driver
• clk: claim clock controller input clocks from DT
• clk: rework dependencies and make the drivers more modular
• NAND: controller driver for GXL/GXM/AXG
• RTC: new driver for Meson6/Meson8/Meson8b/Meson8m2
• GX: add support for the 32kHz clock sub-tree in the AO clock controller
• G12A: add a driver for the peripheral clock controller
• G12A: fix pin controller pull registers
• Meson8b: add the RXD2 and RXD3 pins to the pin controller driver
• Meson8/Meson8b/Meson8m2: add the GPU clock tree
• Meson8b/Meson8m2: add support for the temperature sensor in the SAR ADC driver
• DT Updates
  • AXG: add the SPDIF input
  • AXG: add the eFuse
  • AXG: enable SPDIF input on the S400 board
  • AXG: fix eMMC maximum frequency on the S400 board
  • AXG: enable SDR104 mode for the SDIO WiFi module
  • AXG: enable the clock measurer
  • GX: Add canvas provider node to the VPU
  • G12A: fix bus descriptions
  • G12A: enable the clock measurer
  • G12A: add the main clock controller
  • Meson8/Meson8m2: add the Mali-450 MP6 GPU
  • Meson8b: add the Mali-450 MP2 GPU
  • Meson8b: add missing RGMII Ethernet RXD pins
  • Meson8b: enable the temperature sensor on EC-100 and Odroid-C1
  • Meson8b: enable the PHY interrupt on EC-100
  • Meson8b: add the GPIO line names on EC-100
  • Meson8b: add more regulators for EC-100
  • Meson8m2: enable the temperature sensor on MXIII-Plus
  • Meson8/Meson8b/Meson8m2: add temperature sensor calibration data from eFuse
• New board support
  • X96 Max from Shenzhen Amediatech Technology Co., Ltd (G12A, S905X2)

v5.0

• Support for Canvas shared module from DRM
• Support for DRM Video Overlay and Primary plane scaler
• Support for HDMI 1.4 4K resolutions
• Support for HDMI Alternative 29.97Hz/59.94Hz clocks
• Meson8/Meson8b/Meson8m2/GXBB: fix USB hot-plugging
• Meson8/Meson8b/Meson8m2: CPU clock driver fixes
• Meson8/Meson8b/Meson8m2: make the CPU clock tree mutable
• Meson8/Meson8b/Meson8m2: add the CPU post-divider clocks
• GX: add video clocks in the Common Clock Framework driver (read-only)
• Meson8/Meson8b/Meson8m2: add video clocks in the Common Clock Framework driver (read-only)
• pinctrl: fix for setting the bias
• Implemented a “clock measurer” driver which helps with clock driver development
• Implement the ARM delay timer (32-bit SoCs only) in our timer driver
• Add initial support for the temperature sensor on Meson8 in the SAR ADC driver
• DT Updates
  • all: disable pinctrl bias
  • all: fix MMC card detection GPIO polarity
  • all: fix the Ethernet IRQ (fixes Ethernet performance)
  • AXG: add secure monitor and SCPI support (enables CPU frequency scaling)
  • AXG: add Bluetooth support on the S400 board
  • AXG: remove non-existent alternate XTAL
  • AXG: enable the watchdog
  • AXG: add the inputs for the clock controllers
  • AXG: enable the GPIO interrupt controller
  • AXG: enable the Ethernet PHY interrupt on the S400 board
  • AXG: fix the Ethernet IRQ (fixes Ethernet performance)
  • GX: add the pclk for the efuse
  • GX: add the HDMI 5V regulator on all boards
  • GX: enable the “clock measurer”
  • GXBB: fix GPIO line names on NanoPi K2
  • GXBB: fix GPIO line names on Odroid-C2
  • GXBB: add the inputs for the clock controllers
  • GXL: enable Bluetooth on the Khadas VIM
  • GXL: add the inputs for the clock controllers
  • GXL: fix GPIO line names on Libretech CC
  • GXL: fix GPIO line names on Khadas VIM
  • GXL: disable EEE (Energy Efficient Ethernet) on P230
  • Meson6/Meson8/Meson8b/Meson8m2: add all timer interrupts
  • Meson6/Meson8/Meson8b/Meson8m2: add the timer's clock inputs
  • Meson8/Meson8b/Meson8m2: add the ARM TWD timer
  • Meson8/Meson8b/Meson8m2: prepare support for the ARM Global Timer
  • Meson8/Meson8b/Meson8m2: enable CPU frequency scaling
• New board support
  • PHICOMM N1 (GXL, S905D)
  • Libretech aml-s805x-ac, aka 'La Frite' (GXL, S805X)

v4.20

• meson-sm: add serial number sysfs entry
• canvas video lookup-table driver
• clk-pll: add the enable bit
• clk-pll: split the OD (post-divider) into separate clocks
• clk-pll: remove hardcoded rate tables
• pinctrl: fix pull (up / down) setting for the AO pins
• minor code improvements in the SAR ADC driver
• AXG: round audio system master clocks down
• AXG: don't use mpll3 as PCIe clock parent
• Fix for DRM crtc_vblank errors
• DT updates
  • AXG: add the audio FIFOs
  • AXG: add the PDM audio controller
  • AXG: enable audio support on the S400 board
  • GX: increase shared CMA pool memory size for 4K video support
  • GX: add canvas node
  • GXL: update model name of the Libre Computer Board AML-S905X-CC board
  • Meson8/Meson8b: fix the clock controller register size
  • Meson8b: add Odroid-C1 voltage regulators
  • Meson8b: enable SAR ADC on Odroid-C1
  • Meson8b: add /chosen/stdout-path property for earlycon support on Odroid-C1
  • G12A: basic SoC support
• New board support
  • Endless Mini (EC-100) (Meson8b, S805)

v4.19

• add support for the phase, triple phase and audio sclk divider clock types
• remove audio divider clock type
• remove support for obsolete register access in the AXG and GXBB clock controller drivers
• add support for the gen_clk clock on AXG/GXL/GXM
• AXG: new driver for the audio clock controller
• AXG: new driver for the audio subsystem
• AXG: add support for the PCIe and MIPI clocks
• AXG: add support for the gen_clk_ee function of the pin controller
• GXBB: add support for the gen_clk_out function of the pin controller
• GXL: add support for the S805X and S905W SoCs
• DT updates
  • AXG: add SPDIF output, PDM and SPDIF input pins
  • AXG: add SAR ADC support
  • AXG: add 12V supply on S400
  • AXG: add speaker amplifier and speaker LEDs on S400
  • AXG: enable ADC buttons on S400
  • AXG: add the audio clock controller
  • GXBB: enable HDMI, CEC and CVBS on NanoPi K2
  • GXL/GXM: enable SAR ADC on P231 and Q201
  • GXM: fix cooling cells on Khadas VIM2
• New board support
  • Amlogic P241 (GXL, S805X)
  • Amlogic P281 (GXL, S905W)
  • Oranth Tanix TX3 Mini (GXL, S905W)

v4.18

• AXG: MMC controller driver support
• Meson8m2: add pinctrl support
• AXG: add Meson AXG support to the dwmac-meson8b Ethernet driver
• memory allocation fix for the pwm-meson driver (which can cause memory corruption)
• Meson8/Meson8b/Meson8m2: add support for the NAND clocks
• AXG: add support for the AO clock controller
• the MPLL clock driver can now round to the closest rate (based on the requested rate)
• Meson GX/AXG MMC: support for the reset line
• DT updates
  • GX: add hiubus system controller
  • GX: add alternative ATF reserved memory region (fixes GXBB boards with newer ATF/Amlogic u-boot)
  • AXG: add hiubus system controller
  • AXG: SD/eMMC/SDIO support (sd_emmc_b and sd_emmc_c controllers)
  • AXG: S400: add eMMC storage
  • AXG: S400: add AP6255 SDIO wifi
  • AXG: S400: fix Ethernet stability
  • AXG: GPIO interrupt support
  • AXG: add the 32K alt aoclk
  • GX/AXG: add MMC resets
  • GX/AXG: fix MMC register ranges
  • GXL: disable SD UHS modes on LibreTech CC (“Le Potato”)
  • GXL: add PHY supply (USB VBUS) for P212 and Khadas VIM
  • GXL: fix Mali-450 GPU compatible string
  • Meson8: add Cortex-A9 PMU
  • Meson8b: add Cortex-A5 PMU
  • Meson8b: Odroid-C1: enable the IR receiver
  • Meson8m2: add support for this SoC (“S812”)
• New board support
  • Tronsmart MXIII Plus (Meson8m2)

v4.17

• GX VPU power domain driver: small bugfixes
• reset driver: add support for level resets on Meson8b
• cleanups for the dwmac-meson8b driver (used on Meson8b/GXBB/GXL/GXM)
• clock and reset support for the USB2 PHY driver on GXL/GXM
• Meson8b GPIO driver fixes which make the GPIOs from the CARD, BOOT and DIF banks usable again
• usb: core: support for multiple PHYs per HCD (pre-condition for USB host on GXL/GXM)
• dwc3 support for GXL/GXM/AXG (pre-condition for USB host on GXL/GXM)
• fix ghost key presses in the IR remote driver
• new USB3 PHY driver for GXL/GXM/AXG
• PLL fixes for GXBB, GXL and AXG
• use regmap in clock controller drivers
• general clock updates for Meson8, GXBB, GXL and AXG
• add more SoC IDs (including S905W) to the GX SoC information driver
• SAR ADC support for the Meson AXG SoCs
• Meson8m2 support for the dwmac-meson8b (Ethernet) driver
• DT updates
  • GXL: add internal PHY interrupt
  • GX: fix UART register range
  • AXG: add i2c support
  • AXG: add pinctrl pins for RMII and UART
  • GX: add ethernet0 alias (to make Linux use the MAC address from u-boot)
  • Meson8b: update reset controller register range
  • Meson8: add reset controller and USB reset lines
  • Meson8b: Odroid-C1 Ethernet support
  • Meson8b: add the I2C clocks
  • GXBB: Odroid-C2: reduce eMMC maximum rate (fixes data corruption)
  • GXBB: add a wetek specific dtsi
  • GXBB/GXL: bump Mali-450 clock to 744MHz
  • GX: mark eFuse as read-only
  • GXL: USB host support
  • GXM: USB host support
  • GXL: enable USB host support on the following boards:
    • Khadas VIM
    • LibreTech CC (“Le Potato”)
    • Amlogic P212
    • Amlogic P230
    • Amlogic P231
    • Nexbox A95X
  • GXM: enable USB host support on the following boards:
    • Khadas VIM2
    • Amlogic Q200
    • Amlogic Q201

v4.16

• internal Ethernet PHY on GXL: code-improvements
• Ethernet (RGMII TX) clock (dwmac-meson8b) fixes for Meson8b
• DT updates
  • all SoCs: dropped SANA (“stream analyzer”) clock from SAR ADC
  • Meson8: updated L2 cache settings
  • Meson8b: updated L2 cache settings
  • Meson8/Meson8b: switch to the stable UART bindings
  • Meson8: enable GPIO IRQ support
  • GX: VPU power domain support
  • GX: add 5V HDMI regulator
  • GX: HDMI and CEC support on Odroid-C2
  • GX: use generic bus node names
  • GX: fixed Ethernet PHY GPIO interrupt line on GXM Q200
  • GX: add Ethernet PHY GPIO interrupt line on Khadas VIM2

v4.15

• USB controller interrupt fix for Meson6/Meson8/Meson8b
• SoC information driver for Meson6/Meson8/Meson8b/Meson8m2
• SD/MMC/SDIO driver for Meson6/Meson8/Meson8b/Meson8m2
• pinctrl: cleanups and minor fixes
• GPIO IRQ support on Meson GX as well as Meson8/Meson8b/Meson8m2
• eFuse driver for Meson6/Meson8/Meson8b/Meson8m2
• SMP (multi-core) and CPU hotplug support on Meson8/Meson8b/Meson8m2
• VPU power domain support on Meson GX
• internal Ethernet PHY on GXL: auto-negotiation fix
• UART SysRq
• minor fixes for the SAR ADC on Meson8 and Meson8b
• DT updates
  • Meson8b: add reserved-memory zones to fix system freezes
  • Meson8b: add USB support on Odroid-C1
  • Meson8b: enable GPIO IRQ support
  • Meson8/Meson8b: add the SDIO MMC controller
  • Meson8/Meson8b: add SMP and CPU hotplug support
  • Meson6/Meson8/Meson8b: add the eFuse
  • GX: enable the SAR ADC on Libre Tech CC
  • GX: enable the internal Ethernet PHY LEDs on Libre Tech CC
  • GX: enable the USB on Nexbox A95X (GXBB)
  • GX: pinctrl offset cleanup
  • GX: enable GPIO IRQ support
• New board support
  • Khadas VIM2 (GXM)
  • Tronsmart Vega S96 (GXM)

v4.14

• clock controller driver updates
  • GX: add SD/eMMC clocks
  • GX: fix divider flags
  • GX: add the AO CEC clock
  • Meson8/Meson8b: register reset controller built into the clock-controller
• DT updates
  • GX: GPIO line names for Khadas VIM and NanoPi K2
  • GX: CEC support (for all boards where HDMI is enabled)
  • GX: use the correct MMC clocks
  • GX: add MMC regulator settle times for NanoPi K2, Libre Tech CC, P200 and P201
  • GX: enable SD card UHS modes on NanoPi K2, Libre Tech CC, P200 and P201
  • GX: enable SD card SDR104 mode on NanoPi K2
  • GX: update to use stable UART bindings (fixes HCI UART where the bootloader doesn't enable the UART clocks)
  • Meson8/Meson8b: add the SRAM
  • Meson8: PWM support
  • Meson8b: cleanup duplicate code in watchdog node
• GX: SoC information driver (SoC version, etc.)
• AO CEC Driver
• Watchdog support for Meson8m2

v4.13

• DT cleanups
  • GX: reorganize alphabetically to better avoid conflicts
  • Meson6/8/8b: use interrupt pre-processor macros instead of magic numbers
• add HDMI and CVBS nodes for multiple GX boards
• pinctrl updates:
  • GX: add SPI (SPICC) and HDMI CEC pins
  • Meson8: (AO) HDMI CEC, AO remote output, I2S, SPDIF and PWM pins
• SCPI: fix thermal sensor reporting
• Meson8 support for the SAR ADC driver
• USB PHY driver for Meson GXL/GXM
• SPICC (SPI Communication Controller) driver
• Meson8 clock controller support
• USB support for Meson8 and Meson8b
• Hardware random number generator support for Meson6, Meson8 and Meson8b
• reserved memory zones (to prevent random crashes) on Meson8
• New board support
  • NanoPi K2 (GXBB)
  • R-Box Pro (GXM)

v4.12

• DRM/KMS: added support for HDMI output
• clocks: added clocks for audio, GFX (Mali)
• pinctrl: added pins for audio, missing pins for GXL/GXM
• phy: added GPIO resets for ethernet PHYs
• Add clocks and DT node for Mali-450 support for GXBB/GXL (using off-tree driver)
• usb: dwc2 support for Meson8
• i2c: driver code improvements and code cleanup
• Meson GX MMC
  • performance improvements
  • eMMC calibration support
  • CMD23 support
  • misc. cleanup and refactoring
  • descriptor chaining (DMA) support
• Enhanced board support
  • Amlogic P212 (S905X)
• new boards
  • Khadas Vim (S905X)
  • HwaCom AmazeTV (S905X)

v4.11

• SAR ADC support
• ADC laddered keys (P200 board)
• New board support
  • Wetek Play (S905)
  • Wetek Hub (S905)

v4.10

• Meson GX MMC support, including SDIO WLAN
• Meson GXBB USB (host) support
• Meson GXL internal (100Mbit/s) PHY support
• initial support for the GXL (S905D/S905X) and GXM (S912) SoCs
• SCPI support for GXBB
• CPU DVFS (using SCPI)
• Meson GX DRM basics along with CVBS output
• new board support
  • Amlogic P230 (S905D)
  • Amlogic P212 (S905X)
  • Nexbox A95 (S905)
  • Nexbox A1 (S912)

v4.9

• Meson GX Secure Monitor
• Enhanced Meson GXBB Ethernet support
• Meson GX SPIFC support
• Meson GX I2C support
• Meson8b and GX PWM support
• USB host support
• clocks: added AO clocks and reset
• MHU / mailbox support

v4.8

• Meson GXBB Ethernet support
• Meson GXBB Hardware Random Number Generator
• Meson GXBB Watchdog driver
• Meson 8b and GXBB support for the IR remote driver

v4.7

• MesonGXBB pin control support
• earlycon support in serial driver
• Initial device trees for Amlogic reference boards P200 and P201 (S905)
• Initial device tree for Hardkernel ODROID-C2 (S905)

v4.6

• Initial GXBB family support (clocks, serial)
• Initial device trees for Tronsmart Vega S95 (S905)

v4.5

• Meson8b watchdog support / Reboot
• ODROID-C1 status LED support
• Serial driver bugfixes

v4.4

• Initial Meson8b device trees for Hardkernel ODROID-C1 (S805) and Tronfy MXQ (S805)

v4.2

• Clock controller driver added

v4.1

• MINIX NEO X8 board support (M8-S802)
• Meson8b GPIO & pin control driver added

v4.0

• Meson6/Meson8 GPIO & pin control driver added

v3.19

• Core Meson8 support added
• I2C driver added
• SPI flash driver added
• IR remote control driver added
• L2 cache enabled

v3.18

• Core Meson6 support added
• Geniatech ATV1200 board support (AML8726-MX)
• UART driver added
• Watchdog driver added
• Timer/clocksource driver added
• Ethernet controller enabled with glue added to stmmac driver

Download recent cross-toolchain Linaro Latest arm-linux-gnueabihf binaries

To compile the 32-bit mainline kernel:

# make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- multi_v7_defconfig
# make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- LOADADDR=0x00208000 uImage dtbs
# mkimage -A arm -O linux -C none -T kernel -a 0x00208000 -e 0x00208000 -n linux-next -d arch/arm/boot/zImage ../uImage

To boot the 32-bit kernel using the shipped U-Boot:

# mmcinfo
# fatload mmc 0:1 0x21000000 uImage
# fatload mmc 0:1 0x22000000 rootfs.cpio.uboot
# fatload mmc 0:1 0x21800000 meson8b-mxq.dtb
# setenv bootargs "console=ttyAML0,115200"
# bootm 0x21000000 0x22000000 0x21800000

Download recent cross-toolchain Linaro Latest aarch64-linux-gnu binaries

To compile the 64-bit mainline kernel:

# make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig
# make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- Image dtbs
# mkimage -A arm64 -O linux -T kernel -C none -a 0x1080000 -e 0x1080000 -n linux-next -d arch/arm64/boot/Image ../uImage

To boot the 64-bit kernel using the shipped U-Boot:

# fatload mmc 0:1 0x01080000 uImage
# fatload mmc 0:1 $dtb_mem_addr meson-gxbb-vega-s95-telos.dtb
# setenv bootargs "console=ttyAML0,115200"
# bootm 0x1080000 - $dtb_mem_addr

• HEVC HW Video Decoder (elyotna / narmstrong)
• Meson DRM Features
  • Add Display support for pre-GX SoCs (xdarklight)
  • Add HDMI support for pre-GX SoCs which uses TranSwitch TXC-48352 (or similar part number from TranSwitch) (xdarklight)
  • LVDS and LCD output support on supported boards (DSI narmstrong)

• Meson GX System Suspend / Power Management (Neil Armstrong / narmstrong) (last patches)
• convert existing devices to use the PWM LED driver to allow dimming the LEDs (Martin Blumenstingl / xdarklight) (last patches)

• Support more boards (Amlogic based retail products should have PCB holes to enable Serial console with a simple USB to Serial TTL adapter, i.e. Sparkfun USB to Serial TTL cable)
• USB OTG for Meson8/Meson8b (dwc2 does not get the OTG interrupts, instead Amlogic's kernel code polls some USB PHY registers to detect the mode. maybe this could be solved by implementing extcon usb_role_switch support in the USB2 PHY and dwc2 (based on this RFC))
• Find a way to cap the SCPI cpufreq max frequency to re-enable DVFS on Odroid-C2
• Meson DRM Features
  • Cursor Plane
  • More formats support for Primary Plane
  • ColorKey as DRM Attribute
  • CRTC Color correction attributes
  • CVBS Color optimizations as attributes
• NAND controller driver support for Meson8/Meson8b/Meson8m2/GXBB

Amlogic SoCs support is done via full Driver Model support with default boot scheme including EFI boot support.

Mainline U-Boot is limited to be used with Linux 4.16+, where the Power Domain handling has been added.

Development is done on the master branch of U-Boot.

Official Amlogic U-Boot Documentation: https://u-boot.readthedocs.io/en/latest/board/amlogic/index.html

A custodian tree is available at https://gitlab.denx.de/u-boot/custodians/u-boot-amlogic

A mailing list has been created : u-boot-amlogic@groups.io (https://groups.io/g/u-boot-amlogic)

v2021.04:

• sync amlogic GX & AXG DT to Linux 5.10
• Add new MESON_EE driver support for GXBB & AXG
• Add support for Libretech-CC v2, Wetek Core2, Beelink GT-King/Pro boards
• add driver for TDO tl070wsh30 panel driver
• meson: isolate loading of socinfo
• Add soc_rev to environment
• Enable G12A support for saradc
• Add correct mmcdev on VIM3(L) & Odroid-N2(C4)
• Read MAC from fuses for VIM3 & VIM3L boards
• Add support for ADC function button on VIM3 & VIM3L

v2021.01:

• Add PWM driver

v2020.10:

• Add support for Odroid-C4
• Supports fused MAC address on Odroid-N2 & Odroid-C4

v2020.07:

• USB Gadget support for GXL/GXM boards
• USB Host support for Odroid-C2
• add support for Libre Computer AML-S905D-PC and AML-S912-PC

v2020.04

• Khadas VIM3L support

v2020.01:

• Add support for HDMI/CVBS outpuut for G12A/G12B/SM1
• Add support for Khadas VIM3 board
• Add support for SEI Robotic SEI610 board

v2019.10:

• add support for unique generated MAC adresses from SoC serial
• adds support for the Odroid-N2 board
• adds support for the SEI Robotic SEI510 board

v2019.07:

• Add support for Amlogic p200 & p201 Reference Designs
• Add Amlogic SoC information display
• Add support for the Libretech-AC AML-S805X-AC board
• Amlogic G12A SoC support and U200 reference board
• USB2/USB3 + OTG Support for Amlogic G12A SoC
• add support for getting pinmux status

Note: booting Libretech-AC AML-S805X-AC board with an USB device plugged in the first USB port (next to the IR received) will fail, thsi will be fixed in v2019.10

v2019.04:

• Add support for HDMI output, only enabled on libretech-cc
• Finally fixed VIM2 usb support

v2019.01:

• Add support for AXG SoC family
• Add support for the S400 board
• Add support for the SPIFC Controller

v2018.11

• Add preliminary support for VPU Power Domain
• Support for Khadas VIM2

v2018.09

• Support for FriendlyElec Nanopi-k2
• Fix P212 Ethernet setup

v2018.07

• Support for GXBB, GXL & GXM SAR ADC
• Device Tree synchronized with 4.16
• Amlogic code cleanup
• Add small Amlogic GX Clock driver
• Enable of USB support for Libretech-CC Enabled for P212 and Khadas VIM, but Broken
• Enable of ADC support for Libretech-CC

v2018.05

• Support for GXL & GXM USB Phys and Host Controller
• Support for GXBB, GXL & GXM Reset Controller

v2018.03

• BROKEN Avoid this version, the MMC driver crashes on a division by zero, please stick to v2018.01, the bug has been fixed in v2018.05

v2018.01

• Support for GXL Internal PHY
• Support for I2C Controller
• Support for GXL SoC
• Add BLx memory hole handling as reserved memory for FDT and EFI
• Support for new Boards :
  • Support for P212
  • Support for Khadas VIM
  • Support for LibreTech-CC (Potato)

• DSI Output support for AXG
• Add proper Ethernet glue to drop mach-meson code
• Add proper MDIO mux driver to drop mach-meson code
• Add support for PCIe for A113d/G12A/G12B/SM1

• Add support for changing rate of serial port (setbgr op)
• Port Linux NAND driver to U-Boot
• Add support for 32bit Meson 6/8/8b

Our main source of information is the open source kernel code and Linux SDK published by Amlogic.

A partial S805 SoC manual and a partial S905 SoC manual has been published by Hardkernel.
A partial S905X SoC manual and a partial S912 SoC manual manual have been published by Khadas (on their docs page) A partial S922X SoC manual has been published by Hardkernel

Based on the Amlogic kernel code, these git trees also contain some interesting developments:

• Endless Mobile S805 kernel
• Hardkernel ODROID-C1 kernel
• Hardkernel ODROID-C2 kernel
• Wetek.Play kernel (out of date?)
• Wetek Play OpenELEC kernel
• Khadas VIM kernel (contains some of Amlogic's git history)

All new developments will ultimately go into the official Linux tree. In the meantime, you can find in-development or ready-to-merge changes in these trees :

• Official arm-soc Amlogic sub-architecture linux integration tree
• Amlogic Meson DRM Display driver linux integration tree
• Amlogic Meson Clock driver linux integration tree
• U-Boot Amlogic custodian tree

Experimental Test distributions using mainline (maybe outdated) :

• Experimental OpenEmbedded/Yocto Layer
• Experimental LibreElec Support
• Embedded Linux Conference Quake 3 Arena Demo on Odroid-C2
• Armbian Nightly build with Mainline kernel