[PATCH 1/2] drm: mcde: Fix display initialization problem

[Emil Velikov]

Hi Linus,

On Sat, 13 Jun 2020 at 23:30, Linus Walleij <linus.walleij at linaro.org> wrote:
>
> The following bug appeared in the MCDE driver/display
> initialization during the recent merge window.
>
> First the place we call drm_fbdev_generic_setup() in the
> wrong place: this needs to be called AFTER calling
> drm_dev_register() else we get this splat:
>
>  ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 1 at ../drivers/gpu/drm/drm_fb_helper.c:2198 drm_fbdev_generic_setup+0x164/0x1a8
> mcde a0350000.mcde: Device has not been registered.
> Modules linked in:
> Hardware name: ST-Ericsson Ux5x0 platform (Device Tree Support)
> [<c010e704>] (unwind_backtrace) from [<c010a86c>] (show_stack+0x10/0x14)
> [<c010a86c>] (show_stack) from [<c0414f38>] (dump_stack+0x9c/0xb0)
> [<c0414f38>] (dump_stack) from [<c0121c8c>] (__warn+0xb8/0xd0)
> [<c0121c8c>] (__warn) from [<c0121d18>] (warn_slowpath_fmt+0x74/0xb8)
> [<c0121d18>] (warn_slowpath_fmt) from [<c04b154c>] (drm_fbdev_generic_setup+0x164/0x1a8)
> [<c04b154c>] (drm_fbdev_generic_setup) from [<c04ed278>] (mcde_drm_bind+0xc4/0x160)
> [<c04ed278>] (mcde_drm_bind) from [<c04f06b8>] (try_to_bring_up_master+0x15c/0x1a4)
> (...)
>

Worth adding Cc: stable or Fixes tag, so this lands in the stable branches?
If anything I'm slightly worried that w/o such a tag, the AI bot (as
used by the stable team) might auto-nominate this even where it's not
applicable.

HTH
Emil