Feedback on starfive_visionfive2-riscv64-sidriscv.img about imagebuilder HOT 6 OPEN

I have now got Debian sid automatically booting from my m.2 SSD!

This is a hacky solution because it uses the booti command to load the kernel and initrd instead of using the u-boot sysboot command to parse the extlinux.conf file but its a step in the right direction and proves that direct SSD boot is possible with a current VF2 image.

You might want to run env default -a -f to reset your current u-boot config before running the following u-boot commands:

setenv boot_targets nvme0
setenv preboot 'run chipa_set_uboot;pci enum;nvme scan'
setenv bootargs 'root=/dev/nvme0n1p4 console=tty1 console=ttyS0,115200  debug rootwait  earlycon=sbi'
setenv kernel_comp_addr_r 0x50000000
setenv kernel_comp_size 0x04000000
setenv bootcmd 'fatload nvme 0:3 ${kernel_addr_r} vmlinuz-5.15.0-vf2-104+; fatload nvme 0:3 ${ramdisk_addr_r} initrd.img-5.15.0-vf2-104+; fatload nvme 0:3 ${fdt_addr_r} dtb-5.15.0-vf2-104+/starfive/jh7110-visionfive-v2.dtb; booti $kernel_addr_r $ramdisk_addr_r:$filesize $fdt_addr_r'
saveenv

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I dug out my powered USB 3.0 hub. The USB 3 SATA SSD adapter still only gives me ~200 Kb/s but I can use my 2.5" mechanical USB 3 disk when its plugged into the powered hub and I get about 110 MB/s reads which is pretty much its full speed.

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I've been looking into gettng the video decoding working. The README for the wave511 driver ( https://github.com/starfive-tech/soft_3rdpart.git ) says:

By default, VDEC uses the cma method to allocate mem from the general CMA space. If you want to specify a reserved space for VDEC, you can reserve it in the dts file. At the same time, in the file code/vdi/linux/driver/vdec.c, open the VPU_SUPPORT_RESERVED_VIDEO_MEMORY macro. Simple example of reservation method:

reserved_memory: reserved-memory {
	#address-cells = <2>;
	#size-cells = <2>;
	ranges;
    vpu_reserved: framebuffer@d8000000 {
        reg = <0x0 0xd8000000 0x0 0x20000000>;
    };
};
vpu_dec:vpu_dec@118F0000 {
    compatible = "starfive,vdec";
    reg = <0 0x118F0000 0 0x10000>;
    memory-region = <&vpu_reserved>;
    interrupt-parent = <&plic>;
    interrupts = <23>;
    clocks = <&vpuclk>;
    clock-names = "vcodec";
    status = "okay";
};

https://github.com/starfive-tech/soft_3rdpart/tree/JH7110_VisionFive2_devel/wave420l

If we can get wave420l to build and load its kernel module it promises realtime encoding of 4K H265, which is very impressive for a ~£100 SBC.

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I have been able to successfully boot your sid image directly from NVMe but only when manually entering these commands into u-boot:

nvme scan
fatload nvme 0:3 ${kernel_addr_r} vmlinuz-5.15.0-vf2-104+
fatload nvme 0:3 ${ramdisk_addr_r} initrd.img-5.15.0-vf2-104+
fatload nvme 0:3 ${fdt_addr_r} dtb-5.15.0-vf2-104+/starfive/jh7110-visionfive-v2.dtb
setenv bootargs 'root=/dev/nvme0n1p4 rw console=tty0 console=ttyS0,115200 earlycon rootwait'
setenv kernel_comp_addr_r 0x50000000
setenv kernel_comp_size 0x04000000
booti $kernel_addr_r $ramdisk_addr_r:$filesize $fdt_addr_r

I'll update you when I get u-boot configured correctly to directly boot into Debian - its clearly possible.

Let me know if you beat me to it please!

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sorry for the deleyed response, i'm mostly offline right now - i did not yet look into this - i think i remember a thread in the rvspace forum about it or it was in here maybe? - https://github.com/riscv/meta-riscv/pull/382/files

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Ignore my comment about vdec and the video driver. I've decompiled the current dts that your kernel is using and it already includes vdec support.

I've not had a proper go at getting the vdec ffmpeg to build yet.

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