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| author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2022-04-21 01:12:30 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2022-04-21 09:18:08 +0200 |
| commit | b089c0a9b14c354a0c3a421e09af3208cb7c232c (patch) | |
| tree | fe2473bcdd22788a7a12cc5d6621c328ad39a0ca | |
| parent | Revert "drm: of: Properly try all possible cases for bridge/panel detection" (diff) | |
| download | linux-b089c0a9b14c354a0c3a421e09af3208cb7c232c.tar.xz linux-b089c0a9b14c354a0c3a421e09af3208cb7c232c.zip | |
Revert "drm: of: Lookup if child node has panel or bridge"
Commit '80253168dbfd ("drm: of: Lookup if child node has panel or
bridge")' attempted to simplify the case of expressing a simple panel
under a DSI controller, by assuming that the first non-graph child node
was a panel or bridge.
Unfortunately for non-trivial cases the first child node might not be a
panel or bridge. Examples of this can be a aux-bus in the case of
DisplayPort, or an opp-table represented before the panel node.
In these cases the reverted commit prevents the caller from ever finding
a reference to the panel.
This reverts commit '80253168dbfd ("drm: of: Lookup if child node has
panel or bridge")', in favor of using an explicit graph reference to the
panel in the trivial case as well.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220420231230.58499-2-bjorn.andersson@linaro.org
| -rw-r--r-- | drivers/gpu/drm/drm_of.c | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 026e4e29a0f3..9a2cfab3a177 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -244,21 +244,6 @@ int drm_of_find_panel_or_bridge(const struct device_node *np, if (panel) *panel = NULL; - /** - * Devices can also be child nodes when we also control that device - * through the upstream device (ie, MIPI-DCS for a MIPI-DSI device). - * - * Lookup for a child node of the given parent that isn't either port - * or ports. - */ - for_each_available_child_of_node(np, remote) { - if (of_node_name_eq(remote, "port") || - of_node_name_eq(remote, "ports")) - continue; - - goto of_find_panel_or_bridge; - } - /* * 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, @@ -269,8 +254,6 @@ int drm_of_find_panel_or_bridge(const struct device_node *np, return -ENODEV; remote = of_graph_get_remote_node(np, port, endpoint); - -of_find_panel_or_bridge: if (!remote) return -ENODEV; |