lkml.org 
[lkml]   [2018]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Nouveau] [PATCH] drm/nouveau/bar/gk20a: Avoid bar teardown during init
On Thu, Jan 04, 2018 at 11:29:09AM +0000, Jon Hunter wrote:
> Commit bbb163e18960 ("drm/nouveau/bar: implement bar1 teardown")
> introduced add a teardown helper function for BAR1. During
> initialisation of the Nouveau, initially all the teardown helpers are
> called once, before calling their init counterparts. For gk20a, after
> the BAR1 teardown function is called, the device is hanging during the
> initialisation of the FB sub-device. At this point it is unclear why
> this is happening and this is still under investigation. However, this
> change is preventing Tegra124 devices from booting when Nouveau is
> enabled. To allow Tegra124 to boot, remove the teardown helper for
> gk20a.
>
> This is based upon a previous patch by Guillaume Tucker but limits
> the workaround to only gk20a GPUs.
>
> Fixes: bbb163e18960 ("drm/nouveau/bar: implement bar1 teardown")
> Reported-by: Guillaume Tucker <guillaume.tucker@collabora.com>
> Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
> ---
> I am not happy that we do not yet fully understand the cause of
> the hang, but I am talking with a few people at NVIDIA about this
> and have a few things to look into. However, given that we are
> close to v4.15 being released and I am not sure we will have a
> proper fix in place before, I think it is best to workaround
> this for now.
>
> drivers/gpu/drm/nouveau/nvkm/subdev/bar/base.c | 3 ++-
> drivers/gpu/drm/nouveau/nvkm/subdev/bar/gk20a.c | 1 -
> 2 files changed, 2 insertions(+), 2 deletions(-)

Acked-by: Thierry Reding <treding@nvidia.com>
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2018-01-14 23:21    [W:0.061 / U:0.204 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site