drm/of: Make drm_of_find_panel_or_bridge() to check graph's presence

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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

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Dmitry Osipenko 2020-07-01 10:42:32 +03:00 • committed by Sam Ravnborg

parent 4ec0a44ba8

commit ea5bc3b15e

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drivers/gpu/drm/drm_of.c

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