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| author | Dmitry Osipenko <digetx@gmail.com> | 2020-07-01 10:42:32 +0300 |
|---|---|---|
| committer | Sam Ravnborg <sam@ravnborg.org> | 2020-07-01 10:49:25 +0200 |
| commit | ea5bc3b15e0f2a245ef1b0093ebe8bc489d49936 (patch) | |
| tree | eb61c223395aec0acb01dd8eddb96b2004c30a46 /drivers/gpu/drm/drm_of.c | |
| parent | 4ec0a44ba8d797876ff416fc0317a0169483d240 (diff) | |
| download | linux-stable-ea5bc3b15e0f2a245ef1b0093ebe8bc489d49936.tar.gz linux-stable-ea5bc3b15e0f2a245ef1b0093ebe8bc489d49936.tar.bz2 linux-stable-ea5bc3b15e0f2a245ef1b0093ebe8bc489d49936.zip | |
drm/of: Make drm_of_find_panel_or_bridge() to check graph's presence
When graph isn't defined in a device-tree, the of_graph_get_remote_node()
prints a noisy error message, telling that port node is not found. This is
undesirable behaviour in our case because absence of a panel/bridge graph
is a valid case. Let's check the graph's presence in a device-tree before
proceeding with parsing of the graph.
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200701074232.13632-3-digetx@gmail.com
Diffstat (limited to 'drivers/gpu/drm/drm_of.c')
| -rw-r--r-- | drivers/gpu/drm/drm_of.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index b50b44e76279..fdb05fbf72a0 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -246,6 +246,15 @@ int drm_of_find_panel_or_bridge(const struct device_node *np, if (panel) *panel = NULL; + /* + * of_graph_get_remote_node() produces a noisy error message if port + * node isn't found and the absence of the port is a legit case here, + * so at first we silently check whether graph presents in the + * device-tree node. + */ + if (!of_graph_is_present(np)) + return -ENODEV; + remote = of_graph_get_remote_node(np, port, endpoint); if (!remote) return -ENODEV; |