linux-kernel - [PATCH v10 0/2] Silence missing-graph error for DRM bridges

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Date:   Wed,  1 Jul 2020 10:42:30 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v10 0/2] Silence missing-graph error for DRM bridges

Hi!

This small series improves DRM bridges code by silencing a noisy error
coming from of-graph code for the device-trees that are missing a
display bridge graph.

  graph: no port node found in ...

One example where this error happens is an older bridge-less DTB used
in conjunction with a newer kernel which has a display controller driver
that supports DRM bridges.

Changelog:

v10:- Corrected doc-comment, unbroke the of_graph_get_next_endpoint() and
      improved commit's message in the "add of_graph_is_present()" patch.
      Thanks to Laurent Pinchart for spotting the problems!

v9: - These two patches are factored out from [1] in order to ease applying
      of the patches.

    - The of_graph_presents() is renamed to of_graph_is_present() like it
      was requested by Rob Herring in the review comment to [1].

    - Added Rob's r-b.

    [1] https://patchwork.ozlabs.org/project/linux-tegra/list/?series=184102

Dmitry Osipenko (2):
  of_graph: add of_graph_is_present()
  drm/of: Make drm_of_find_panel_or_bridge() to check graph's presence

 drivers/gpu/drm/drm_of.c |  9 +++++++++
 drivers/of/property.c    | 23 +++++++++++++++++++++++
 include/linux/of_graph.h |  6 ++++++
 3 files changed, 38 insertions(+)

-- 
2.26.0