[PATCH 1/8] ofnode: support panel-timings in ofnode_decode_display_timing

[Raphael Gallais-Pou]

The "Display Timings" in panel-common.yaml can be provided by 2 properties
- panel-timing: when display panels are restricted to a single resolution
                the "panel-timing" node expresses the required timings.
- display-timings: several resolutions with different timings are supported
                   with several timing subnode of "display-timings" node

This patch update the parsing function to handle this 2 possibility
when index = 0.

Signed-off-by: Raphael Gallais-Pou <raphael.gallais-...@foss.st.com>
---
 drivers/core/ofnode.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index 
e040e3f2806ffe74c58dcd82f36307351acd5a99..5a721b46e5a3214e7bd437739776362c2d22a3c9
 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -1221,13 +1221,16 @@ int ofnode_decode_display_timing(ofnode parent, int 
index,
        int ret = 0;
 
        timings = ofnode_find_subnode(parent, "display-timings");
-       if (!ofnode_valid(timings))
-               return -EINVAL;
-
-       i = 0;
-       ofnode_for_each_subnode(node, timings) {
-               if (i++ == index)
-                       break;
+       if (ofnode_valid(timings)) {
+               i = 0;
+               ofnode_for_each_subnode(node, timings) {
+                       if (i++ == index)
+                               break;
+               }
+       } else {
+               if (index != 0)
+                       return -EINVAL;
+               node = ofnode_find_subnode(parent, "panel-timing");
        }
 
        if (!ofnode_valid(node))

-- 
2.25.1