On Thu, Apr 21, 2022 at 8:22 AM Javier Martinez Canillas <javierm@xxxxxxxxxx> wrote: > > On 4/21/22 14:54, Patrik Jakobsson wrote: > > On Thu, Apr 21, 2022 at 2:47 PM Javier Martinez Canillas > > <javierm@xxxxxxxxxx> wrote: > > [snip] > > >>>>> diff --git a/drivers/gpu/drm/gma500/Kconfig b/drivers/gpu/drm/gma500/Kconfig > >>>>> index 0cff20265f97..a422fa84d53b 100644 > >>>>> --- a/drivers/gpu/drm/gma500/Kconfig > >>>>> +++ b/drivers/gpu/drm/gma500/Kconfig > >>>>> @@ -2,11 +2,13 @@ > >>>>> config DRM_GMA500 > >>>>> tristate "Intel GMA500/600/3600/3650 KMS Framebuffer" > >>>>> depends on DRM && PCI && X86 && MMU > >>>>> + depends on FB > >>>> > >>>> Why do we need FB here? Framebuffer support should be hidden by DRM's > >>>> fbdev helpers. > >>> > >>> It is not needed but gives him video output since it enables the drm > >>> fbdev emulation. > >>> > >> > >> I'm not sure to understand this. Shouldn't depend on DRM_FBDEV_EMULATION then? > > > > No, it shouldn't depend on any FBDEV stuff since it's not actually > > required. It just happens to help in this case since weston + fbdev > > backend works but not weston with drm backend (or whatever config > > James have set). > > I see. Then the correct approach for them would be to just enable CONFIG_FB > and DRM_FBDEV_EMULATION in their kernel config, rather than making this to > depend on anything FB related as you said. Yeah, so it looks like CONFIG_FB_EFI is not needed but CONFIG_DRM_FBDEV_EMULATION is, I think I just assumed efifb was what was needed based on the kernel logs. This does not work: CONFIG_FB enabled CONFIG_DRM_FBDEV_EMULATION disabled This works: CONFIG_FB enabled CONFIG_DRM_FBDEV_EMULATION enabled > > > > >> > >>> I looked some more at the logs and it seems weston doesn't work on his > >>> system without the fbdev backend. So the question is why weston isn't > >>> working without fbdev? Perhaps this is just a Weston configuration > >>> issue? > >>> > >> > >> But is weston using the fbdev emulated by DRM or the one registered by > >> efifb? I thought that the latter from what was mentioned in this thread. > > > > It's using drm fbdev emulation with gma500 so EFIFB has nothing to do > > with this. I believe it was just simply incorrectly reported. If I'm > > correct then "depends on FB" is what makes video output work for > > James. > > > > Got it. Thanks for the clarification. Here's my weston.ini: [core] shell=kiosk-shell.so modules=systemd-notify.so backend=drm-backend.so idle-time=0 require-input=false use-pixman=true [shell] locking=false cursor-theme=Obsidian panel-position=none [output] name=DVI-D-1 transform=rotate-270 [output] name=DP-2 mode=off [output] name=LVDS-1 mode=off [libinput] touchscreen_calibrator=true > > -- > Best regards, > > Javier Martinez Canillas > Linux Engineering > Red Hat >
