[lkml]   [2018]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] drm/sun4i: fix build failure with CONFIG_DRM_SUN8I_MIXER=m
Dne ponedeljek, 09. julij 2018 ob 10:07:24 CEST je Maxime Ripard napisal(a):
> On Fri, Jul 06, 2018 at 02:45:53PM +0200, Arnd Bergmann wrote:
> > Having DRM_SUN4I built-in but DRM_SUN8I_MIXER as a loadable module results
> > in a link error, as we try to access a symbol from the sun8i_tcon_top.ko
> > module:
> >
> > ERROR: "sun8i_tcon_top_of_table" [drivers/gpu/drm/sun4i/sun8i-drm-hdmi.ko]
> > undefined! ERROR: "sun8i_tcon_top_of_table"
> > [drivers/gpu/drm/sun4i/sun4i-drm.ko] undefined!
> >
> > This solves the problem by making DRM_SUN8I_MIXER a 'bool' symbol,
> > building
> > the sun8i_tcon_top module the same way as the core sun4i-drm module
> > whenever DRM_SUN8I_MIXER is enabled, or not building it at all otherwise.
> >
> > Alternatively, we could always build sun8i_tcon_top.ko along with
> > sun4-drm.ko and detach it from the mixer module, I could not tell which
> > way is more appropriate here.
> If that's easily doable, then yeah, that would be the preferred option
> I guess. Jernej? Chen-Yu? Any opinion on this?

I guess that only means building sun8i_tcon_top.o with DRM_SUN4I instead of

While this would be simple solution, sun8i_tcon_top would be dead weight if
DRM_SUN8I_MIXER is disabled. But it is really small module, so I don't see any

Additionally, with my follow up R40 HDMI series, there is even more calls from
DRM_SUN4I enabled drivers to sun8i_tcon_top driver.

So I'm also for sun8i_tcon_top.o being build with DRM_SUN4I, because it is
simpler, cleaner and it's symbols (including those introduced in R40 HDMI
follow up series) are used mostly by DRM_SUN4I drivers (only exception being

Best regards,

 \ /
  Last update: 2018-07-09 10:59    [W:0.075 / U:1.944 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site