Thread (9 messages) 9 messages, 3 authors, 2013-07-14

Re: [PATCH RFC v3] media: OF: add video sync endpoint property

From: Prabhakar Lad <prabhakar.csengg@gmail.com>
Date: 2013-07-12 04:30:19
Also in: linux-media, lkml

Hi Sylwester,

On Fri, Jul 12, 2013 at 2:45 AM, Sylwester Nawrocki
[off-list ref] wrote:
On 07/11/2013 01:41 PM, Prabhakar Lad wrote:
[...]
quoted
quoted
quoted
diff --git a/drivers/media/v4l2-core/v4l2-of.c
b/drivers/media/v4l2-core/v4l2-of.c
index aa59639..1a54530 100644
--- a/drivers/media/v4l2-core/v4l2-of.c
+++ b/drivers/media/v4l2-core/v4l2-of.c
@@ -100,6 +100,26 @@ static void v4l2_of_parse_parallel_bus(const struct
device_node *node,
         if (!of_property_read_u32(node, "data-shift",&v))
                 bus->data_shift = v;

+       if (!of_property_read_u32(node, "video-sync",&v)) {
+               switch (v) {
+               case V4L2_MBUS_VIDEO_SEPARATE_SYNC:
+                       flags |= V4L2_MBUS_VIDEO_SEPARATE_SYNC;


I'm not convinced all those video sync types is something that really
belongs
to the flags field. In my understanding this field is supposed to hold
only
the _signal polarity_ information.
Ok, so there should be a function say v4l2_of_parse_signal_polarity()
to get the polarity alone then.

I don't think this is required, I would just extend
v4l2_of_parse_parallel_bus()
function to also handle sync-on-green-active property.
If that is the case than I have to add a member say 'signal_polarity'
in struct v4l2_of_bus_parallel and assign the polarity to it.
Let me know if you are OK with it.

Regards,
--Prabhakar Lad
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