[PATCH 00/10] Set up generic fbdev after registering device

[Sam Ravnborg]

Hi Thomas.

On Mon, Apr 06, 2020 at 03:43:55PM +0200, Thomas Zimmermann wrote:
> Generic fbdev emulation is a DRM client. If possible, it should behave
> like userspace clients. Therefore it should not run before the driver
> registered the new DRM device. If the setup function fails, the driver
> should not report an error.

Thanks for taking the time to refactor all the relevant drivers.

I have received some push-back in the past when suggesting this,
but cannot remember from who.
Let's see what review comments you get.

As the rule is that the fbdev setup shall be setup after registering
the DRM device - it would be nice to have this included in the
documentation of drm_fbdev_generic_setup

Could you try to to update the documentation to cover this?

I will get back to the patches later this week.

	Sam

> 
> This is a follow-up patchset to the discussion at [1].  I went
> through all calls to drm_fbdev_generic_setup(), moved them to the
> final operation of their driver's probe function, and removed the
> return value.
> 
> Built-tested on x86-64, aarch64 and arm.
> 
> [1] https://lore.kernel.org/dri-devel/20200403135828.2542770-1-daniel.vetter@ffwll.ch/T/#m216b5b37aeeb7b28d55ad73b7a702b3d1d7bf867
> 
> Thomas Zimmermann (10):
>   drm/ast: Set up fbdev after registering device; remove error checks
>   drm/hibmc: Remove error check from fbdev setup
>   drm/kirin: Set up fbdev after fully registering device
>   drm/ingenic: Remove error check from fbdev setup
>   drm/mediathek: Remove error check from fbdev setup
>   drm/mgag200: Set up fbdev after registering device; remove error
>     checks
>   drm/tilcdc: Set up fbdev after fully registering device
>   drm/udl: Remove error check from fbdev setup
>   drm/vboxvideo: Set up fbdev after registering device; remove error
>     checks
>   drm/fb-helper: Remove return value from drm_fbdev_generic_setup()
> 
>  drivers/gpu/drm/ast/ast_drv.c                  |  3 +++
>  drivers/gpu/drm/ast/ast_main.c                 |  5 -----
>  drivers/gpu/drm/drm_fb_helper.c                | 18 ++++++++----------
>  .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c    |  6 +-----
>  .../gpu/drm/hisilicon/kirin/kirin_drm_drv.c    |  4 ++--
>  drivers/gpu/drm/ingenic/ingenic-drm.c          |  4 +---
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c         |  4 +---
>  drivers/gpu/drm/mgag200/mgag200_drv.c          |  2 ++
>  drivers/gpu/drm/mgag200/mgag200_main.c         |  4 ----
>  drivers/gpu/drm/tilcdc/tilcdc_drv.c            |  3 +--
>  drivers/gpu/drm/udl/udl_drv.c                  |  6 +-----
>  drivers/gpu/drm/vboxvideo/vbox_drv.c           |  6 ++----
>  include/drm/drm_fb_helper.h                    |  5 +++--
>  13 files changed, 25 insertions(+), 45 deletions(-)
> 
> --
> 2.26.0