Hi, I have a Lichee RV dock running https://github.com/smaeul/linux/blob/d1-wip-v5.18-rc4 also have no /dev/fb0. Maybe the DRM driver doesn't implement fbdev emulation ?
Brandon On Sunday, May 29, 2022 at 4:04:25 AM UTC+1 b.s...@gmail.com wrote: > It got worse with the new u-boot? > > I no longer have a /dev/fb0 and this is reported by the kernel: > > # journalctl | grep drm > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: Adding to iommu > group 0 > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5100000.mixer (ops 0xffffffff80c5f628) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5200000.mixer (ops 0xffffffff80c5f628) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: Adding to iommu > group 0 > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5100000.mixer (ops 0xffffffff80c5f628) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5460000.tcon-top (ops 0xffffffff80c63ca8) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5200000.mixer (ops 0xffffffff80c5f628) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5460000.tcon-top (ops 0xffffffff80c63ca8) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: No panel or > bridge found... RGB output disabled > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5461000.lcd-controller (ops 0xffffffff80c5c6d8) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5470000.lcd-controller (ops 0xffffffff80c5c6d8) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: No panel or > bridge found... RGB output disabled > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5461000.lcd-controller (ops 0xffffffff80c5c6d8) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5470000.lcd-controller (ops 0xffffffff80c5c6d8) > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5500000.hdmi (ops 0xffffffff80c5e718) > May 25 16:58:49 sipeed kernel: [drm] Initialized sun4i-drm 1.0.0 20150629 > for display-engine on minor 0 > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: bound > 5500000.hdmi (ops 0xffffffff80c5e718) > May 25 16:58:49 sipeed kernel: [drm] Initialized sun4i-drm 1.0.0 20150629 > for display-engine on minor 0 > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: [drm] Cannot find > any crtc or sizes > May 25 16:58:49 sipeed kernel: sun4i-drm display-engine: [drm] Cannot find > any crtc or sizes > May 25 16:58:50 sipeed systemd[1]: Starting Load Kernel Module drm... > May 25 16:58:50 sipeed systemd[1]: Starting Load Kernel Module drm... > May 25 16:58:50 sipeed systemd[1]: modp...@drm.service: Deactivated > successfully. > May 25 16:58:50 sipeed systemd[1]: Finished Load Kernel Module drm. > May 25 16:58:50 sipeed systemd[1]: modp...@drm.service: Deactivated > successfully. > May 25 16:58:50 sipeed systemd[1]: Finished Load Kernel Module drm. > May 26 09:28:15 sipeed sudo[1098]: sipeed : TTY=pts/0 ; PWD=/home/sipeed > ; USER=root ; COMMAND=/bin/grep sun4i-drm /var/log/syslog > May 26 09:28:40 sipeed sudo[1124]: sipeed : TTY=pts/0 ; PWD=/home/sipeed > ; USER=root ; COMMAND=/bin/grep -a sun4i-drm /var/log/syg > > Also, backlight is off now. > > I grabbed the tgz and then built: u-boot-d1-2022-05-26 and ran mkimage > again, and dd'd the toc1. > > > > On Fri, May 27, 2022 at 7:33 AM Samuel Holland <sam...@sholland.org> > wrote: > >> On 5/26/22 11:33 AM, Bram Stolk wrote: >> > I will document what I can find about the RV86 screen, here: >> > https://linux-sunxi.org/Lichee_RV_86_Panel >> >> I figured out what was wrong with mainline -- I had forgotten the pinctrl >> node >> in the devicetree for the RGB LCD interface. As a result, all of the >> data/clock >> pins were tri-stated, and of course that meant no picture. It turns out >> the >> driver itself was fine. >> >> If you update to the latest U-Boot tag, that will come with the fixed >> devicetree, and the panel should start working: >> >> https://github.com/smaeul/u-boot/releases/tag/d1-2022-05-26 >> >> Regards, >> Samuel >> > > > -- > Owner/Director of Game Studio Abraham Stolk Inc. > Vancouver BC, Canada > b.s...@gmail.com > > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/7f4274b7-deb2-4517-bb46-6c1b29ca695dn%40googlegroups.com.
