diff options
| author | Lyude Paul <lyude@redhat.com> | 2021-04-23 21:42:55 +0300 |
|---|---|---|
| committer | Lyude Paul <lyude@redhat.com> | 2021-04-28 01:43:42 +0300 |
| commit | 6cba3fe433415b2549c909ce72601902c8254a83 (patch) | |
| tree | c5b515f79bfbdd309e30f95a3136c2bb4ec6cf76 /drivers/gpu/drm/tegra/dpaux.c | |
| parent | fd43ad9d47e74018d4487dcb3f828ae398fb3530 (diff) | |
| download | linux-6cba3fe433415b2549c909ce72601902c8254a83.tar.xz | |
drm/dp: Add backpointer to drm_device in drm_dp_aux
This is something that we've wanted for a while now: the ability to
actually look up the respective drm_device for a given drm_dp_aux struct.
This will also allow us to transition over to using the drm_dbg_*() helpers
for debug message printing, as we'll finally have a drm_device to reference
for doing so.
Note that there is one limitation with this - because some DP AUX adapters
exist as platform devices which are initialized independently of their
respective DRM devices, one cannot rely on drm_dp_aux->drm_dev to always be
non-NULL until drm_dp_aux_register() has been called. We make sure to point
this out in the documentation for struct drm_dp_aux.
v3:
* Add WARN_ON_ONCE() to drm_dp_aux_register() if drm_dev isn't filled out
Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210423184309.207645-4-lyude@redhat.com
Reviewed-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/tegra/dpaux.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/dpaux.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c index ea56c6ec25e4..7d7cc90b6fc9 100644 --- a/drivers/gpu/drm/tegra/dpaux.c +++ b/drivers/gpu/drm/tegra/dpaux.c @@ -719,6 +719,7 @@ int drm_dp_aux_attach(struct drm_dp_aux *aux, struct tegra_output *output) unsigned long timeout; int err; + aux->drm_dev = output->connector.dev; err = drm_dp_aux_register(aux); if (err < 0) return err; |