Hi Wenbin, I made a merge request for this issue onn debian kernel repo.
Check this link: https://salsa.debian.org/kernel-team/linux/-/merge_requests/2034 > Package: src:linux > Version: 7.1.3-1 > Severity: normal > Tags: patch upstream > > Dear Maintainer, > > The riscv64 kernel configuration (debian/config/riscv64/config: shipped as > /usr/src/linux-config-7.1/config.riscv64_none_riscv64.xz) has > # CONFIG_DRM_AST is not set > As a result, systems whose only display output is an on-board ASPEED BMC > graphics controller (AST2000/2100/2200/2300/2400/2500/2600, PCI vendor 1A03) > have no usable console/GNOME on the physical head or KVM-over-IP. This is > very common on server-class riscv64 boards (e.g. SpacemiT-based platforms) > that inherit BMC hardware from the server world. > For comparison, DRM_AST is enabled as a module on every other Debian > architecture that has PCI (amd64, arm64, ppc64el, s390x, ...), so this > appears to be an oversight rather than a deliberate omission specific to > riscv64. > Please enable CONFIG_DRM_AST as a module in the riscv64 kernel config. > > -- Reproducer ----------------------------------------------------- > > Hardware: SpacemiT riscv64 board with on-board ASPEED AST2600 BMC > Kernel: 7.1.3+deb14-riscv64 (linux 7.1.3-1) > Userland: Debian forky/sid, GNOME on Wayland > > $ lspci -nn | grep -i aspeed > 0001:02:00.0 VGA compatible controller [0300]: > ASPEED Technology, Inc. ASPEED Graphics Family [1a03:2000] (rev 52) > > $ lspci -k -s 0001:02:00.0 > 0001:02:00.0 VGA compatible controller: ASPEED Technology, Inc. > ASPEED Graphics Family (rev 52) > Subsystem: ASPEED Technology, Inc. ASPEED Graphics Family > (no "Kernel driver in use:" line) > > $ modinfo ast > modinfo: ERROR: Module ast not found. > > $ grep DRM_AST /boot/config-$(uname -r) > # CONFIG_DRM_AST is not set > > $ ls /sys/class/drm/ > version > (no card0; no /dev/dri/card0; no /dev/fb0) > > Result: gdm3/GNOME has no output on the physical KVM head. > > > -- Verification that the driver works when built ----------------- > > Rebuilding the in-tree driver as an out-of-tree module against the shipped > headers is sufficient: > # apt-get install linux-headers-$(uname -r) linux-source-7.1 \ > build-essential bc > $ mkdir -p ~/ast-build && cd ~/ast-build > $ tar -xf /usr/src/linux-source-7.1.tar.xz --wildcards \ > 'linux-source-7.1/drivers/gpu/drm/ast/*' > $ cd linux-source-7.1/drivers/gpu/drm/ast > $ make -C /lib/modules/$(uname -r)/build M=$(pwd) modules \ > CONFIG_DRM_AST=m > # cp ast.ko /lib/modules/$(uname -r)/kernel/drivers/gpu/drm/ast/ > # depmod -a && modprobe ast > > Dmesg after loading: > > ast 0001:02:00.0: Using default configuration > ast 0001:02:00.0: AST 2600 detected > ast 0001:02:00.0: [drm] Using analog VGA > ast 0001:02:00.0: [drm] Registered 1 planes with drm panic > [drm] Initialized ast 0.1.0 for 0001:02:00.0 on minor 0 > ast 0001:02:00.0: [drm] fb0: astdrmfb frame buffer device > > /dev/dri/card0 and /dev/fb0 appear, and GNOME comes up normally. All required > deps (drm, drm_kms_helper, drm_shmem_helper, drm_client_lib, i2c-algo-bit, > ttm) are already shipped in > linux-image-7.1.3+deb14-riscv64, so enabling DRM_AST=m has no new dependency > implication. > > -- Suggested patch (against debian/config/riscv64/config) -------- > > --- a/debian/config/riscv64/config > +++ b/debian/config/riscv64/config > @@ > -# CONFIG_DRM_AST is not set > +CONFIG_DRM_AST=m > > (Filenames in the source package may differ slightly; the change is to flip > the DRM_AST line for the riscv64 flavour, matching amd64 /arm64.) > > -- System Information -------------------------------------------- > > Debian Release: forky/sid > Architecture: riscv64 (riscv64) > > Kernel: Linux 7.1.3+deb14-riscv64 (SMP w/80 CPU threads; PREEMPT) > Locale: LANG=zh_CN.UTF-8, LC_CTYPE=zh_CN.UTF-8 (charmap=UTF-8) > Shell: /bin/bash > > Versions of packages linux-image-7.1.3+deb14-riscv64 depends on: > (as reported by `apt-cache policy` / `dpkg -s`) > > -- no debconf information > > Thank you for your work on the Debian kernel. > > Regards, > Wenbin Zheng > > > This message and any attachment are confidential and may be privileged or > otherwise protected from disclosure. If you are not an intended recipient of > this message, please delete it and any attachment from your system and notify > the sender immediately by reply e-mail. Unintended recipients should not use, > copy, disclose or take any action based on this message or any information > contained in this message. Emails cannot be guaranteed to be secure or error > free as they can be intercepted, amended, lost or destroyed, and you should > take full responsibility for security checking. > > 本邮件及其任何附件具有保密性质，并可能受其他保护或不允许被披露给第三方。如阁下误收到本邮件，敬请立即以回复电子邮件的方式通知发件人，并将本邮件及其任何附件从阁下系统中予以删除。如阁下并非本邮件写明之收件人，敬请切勿使用、复制、披露本邮件或其任何内容，亦请切勿依本邮件或其任何内容而采取任何行动。电子邮件无法保证是一种安全和不会出现任何差错的通信方式，可能会被拦截、修改、丢失或损坏，收件人需自行负责做好安全检查。 > Thanks! Best regards, Yunseong
