[PATCH v2 01/12] media: v4l2-common: Constify media_pad argument to v4l2_get_link_freq()

[Laurent Pinchart]

The v4l2_get_link_freq() macro doesn't modify the pad argument. Make it
possible to call it with a const media_pad pointer.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 drivers/media/v4l2-core/v4l2-common.c | 2 +-
 include/media/v4l2-common.h           | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index a5334aa35992..4d686338e345 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -551,7 +551,7 @@ s64 __v4l2_get_link_freq_ctrl(struct v4l2_ctrl_handler *handler,
 EXPORT_SYMBOL_GPL(__v4l2_get_link_freq_ctrl);
 
 #ifdef CONFIG_MEDIA_CONTROLLER
-s64 __v4l2_get_link_freq_pad(struct media_pad *pad, unsigned int mul,
+s64 __v4l2_get_link_freq_pad(const struct media_pad *pad, unsigned int mul,
 			     unsigned int div)
 {
 	struct v4l2_mbus_config mbus_config = {};
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 39dd0c78d70f..ede24e60dbec 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -580,10 +580,11 @@ int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat,
 #ifdef CONFIG_MEDIA_CONTROLLER
 #define v4l2_get_link_freq(pad, mul, div)				\
 	_Generic(pad,							\
+		 const struct media_pad *: __v4l2_get_link_freq_pad,	\
 		 struct media_pad *: __v4l2_get_link_freq_pad,		\
 		 struct v4l2_ctrl_handler *: __v4l2_get_link_freq_ctrl)	\
 	(pad, mul, div)
-s64 __v4l2_get_link_freq_pad(struct media_pad *pad, unsigned int mul,
+s64 __v4l2_get_link_freq_pad(const struct media_pad *pad, unsigned int mul,
 			     unsigned int div);
 #else
 #define v4l2_get_link_freq(handler, mul, div)		\
-- 
Regards,

Laurent Pinchart