Re: [RESEND PATCH v1 4/4] doc: t-head: lpi4a: document Lichee PI 4A board

Leo Liang
2023-06-29T02:59:28Z

Hi YiXun,

On Fri, May 26, 2023 at 08:41:07PM +0800, Yixun Lan wrote:
> Reviewed-by: Wei Fu <wefu@redhat.com>
> Signed-off-by: Yixun Lan <dlan@gentoo.org>
> ---
> doc/board/index.rst | 1 +
> doc/board/thead/index.rst | 9 +++
> doc/board/thead/lpi4a.rst | 112 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 122 insertions(+)
> create mode 100644 doc/board/thead/index.rst
> create mode 100644 doc/board/thead/lpi4a.rst
>
> diff --git a/doc/board/index.rst b/doc/board/index.rst
> index 9ef25b1091..aadc90af89 100644
> --- a/doc/board/index.rst
> +++ b/doc/board/index.rst
> @@ -45,6 +45,7 @@ Board-specific doc
> starfive/index
> ste/index
> tbs/index
> + thead/index
> ti/index
> toradex/index
> variscite/index
> diff --git a/doc/board/thead/index.rst b/doc/board/thead/index.rst
> new file mode 100644
> index 0000000000..41566d3a36
> --- /dev/null
> +++ b/doc/board/thead/index.rst
> @@ -0,0 +1,9 @@
> +.. SPDX-License-Identifier: GPL-2.0+
> +
> +T-HEAD
> +========
> +
> +.. toctree::
> + :maxdepth: 1
> +
> + lpi4a
> diff --git a/doc/board/thead/lpi4a.rst b/doc/board/thead/lpi4a.rst
> new file mode 100644
> index 0000000000..3764e732af
> --- /dev/null
> +++ b/doc/board/thead/lpi4a.rst
> @@ -0,0 +1,112 @@
> +.. SPDX-License-Identifier: GPL-2.0+
> +
> +Sipeed's Lichee PI 4A based on T-HEAD TH1520 SoC
> +====================
> +

The underline is too short and would cause error when building docs.

Best regards,
Leo
> +TH1520 RISC-V SoC
> +---------------------
> +The TH1520 is 4+2 core 64-bit RISC-V SoC from Alibaba T-HEAD, it's capable of
> +running highest CPU frequency at 2.5 GHz, integrate Imagination GPU for graphics,
> +also with 4 TOPS NPU for AI acceleration.
> +
> +Mainline support
> +----------------
> +
> +The support for following drivers are already enabled:
> +
> +1. ns16550 UART Driver.
> +
> +Building
> +~~~~~~~~
> +
> +1. Add the RISC-V toolchain to your PATH.
> +2. Setup ARCH & cross compilation environment variable:
> +
> +.. code-block:: none
> +
> + export CROSS_COMPILE=<riscv64 toolchain prefix>
> +
> +The U-Boot is capable of running in M-Mode, so we can directly build it.
> +
> +.. code-block:: console
> +
> + cd <U-Boot-dir>
> + make th1520_lpi4a_defconfig
> + make
> +
> +This will generate u-boot-dtb.bin
> +
> +Booting
> +~~~~~~~
> +
> +Currently, we rely on vendor u-boot to initialize the clock, pinctrl subsystem,
> +and chain load the mainline u-boot image either via tftp or emmc storage,
> +then bootup from it.
> +
> +Sample boot log from Lichee PI 4A board via tftp
> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +.. code-block:: none
> +
> + brom_ver 8
> + [APP][E] protocol_connect failed, exit.
> +
> + U-Boot SPL 2020.01-00016-g8c870a6be8 (May 20 2023 - 01:04:49 +0000)
> + FM[1] lpddr4x dualrank freq=3733 64bit dbi_off=n sdram init
> + ddr initialized, jump to uboot
> + image has no header
> +
> +
> + U-Boot 2020.01-00016-g8c870a6be8 (May 20 2023 - 01:04:49 +0000)
> +
> + CPU: rv64imafdcvsu
> + Model: T-HEAD c910 light
> + DRAM: 8 GiB
> + C910 CPU FREQ: 750MHz
> + AHB2_CPUSYS_HCLK FREQ: 250MHz
> + AHB3_CPUSYS_PCLK FREQ: 125MHz
> + PERISYS_AHB_HCLK FREQ: 250MHz
> + PERISYS_APB_PCLK FREQ: 62MHz
> + GMAC PLL POSTDIV FREQ: 1000MHZ
> + DPU0 PLL POSTDIV FREQ: 1188MHZ
> + DPU1 PLL POSTDIV FREQ: 1188MHZ
> + MMC: sdhci@ffe7080000: 0, sd@ffe7090000: 1
> + Loading Environment from MMC... OK
> + Error reading output register
> + Warning: cannot get lcd-en GPIO
> + LCD panel cannot be found : -121
> + splash screen startup cost 16 ms
> + In: serial
> + Out: serial
> + Err: serial
> + Net:
> + Warning: ethernet@ffe7070000 using MAC address from ROM
> + eth0: ethernet@ffe7070000ethernet@ffe7070000:0 is connected to ethernet@ffe7070000. Reconnecting to ethernet@ffe7060000
> +
> + Warning: ethernet@ffe7060000 (eth1) using random MAC address - 42:25:d4:16:5f:fc
> + , eth1: ethernet@ffe7060000
> + Hit any key to stop autoboot: 2
> + ethernet@ffe7060000 Waiting for PHY auto negotiation to complete.. done
> + Speed: 1000, full duplex
> + Using ethernet@ffe7070000 device
> + TFTP from server 192.168.8.50; our IP address is 192.168.8.45
> + Filename 'u-boot-dtb.bin'.
> + Load address: 0x1c00000
> + Loading: * #########################
> + 8 MiB/s
> + done
> + Bytes transferred = 376686 (5bf6e hex)
> + ## Starting application at 0x01C00000 ...
> +
> + U-Boot 2023.07-rc2-00004-g1befbe31c1 (May 23 2023 - 18:40:01 +0800)
> +
> + CPU: rv64imafdc
> + Model: Sipeed Lichee Pi 4A
> + DRAM: 8 GiB
> + Core: 13 devices, 6 uclasses, devicetree: separate
> + Loading Environment from <NULL>... OK
> + In: serial@ffe7014000
> + Out: serial@ffe7014000
> + Err: serial@ffe7014000
> + Model: Sipeed Lichee Pi 4A
> + LPI4A=>
> --
> 2.40.0
>