Hi,
On 20/01/2025 13:01, Sakari Ailus wrote:
v4l2_get_link_freq() accepts a V4L2 control handler for now, but it needs
to take struct media_pad argument in order to obtain the link frequency
using get_mbus_config() pad op. Prepare for this by allowing struct
media_pad as well.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-common.c | 21 ++++++++++++++++++---
include/media/v4l2-common.h | 19 ++++++++++++++++---
2 files changed, 34 insertions(+), 6 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 0a2f4f0d0a07..9fe74c7e064f 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -466,8 +466,8 @@ int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat,
}
EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
-s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul,
- unsigned int div)
+s64 __v4l2_get_link_freq_ctrl(struct v4l2_ctrl_handler *handler,
+ unsigned int mul, unsigned int div)
{
struct v4l2_ctrl *ctrl;
s64 freq;
@@ -502,7 +502,22 @@ s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul,
return freq > 0 ? freq : -EINVAL;
}
-EXPORT_SYMBOL_GPL(v4l2_get_link_freq);
+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,
+ unsigned int div)
+{
+ struct v4l2_subdev *sd;
+
+ sd = media_entity_to_v4l2_subdev(pad->entity);
+ if (!sd)
+ return -ENODEV;
+
+ return __v4l2_get_link_freq_ctrl(sd->ctrl_handler, mul, div);
+}
+EXPORT_SYMBOL_GPL(__v4l2_get_link_freq_pad);
+#endif /* CONFIG_MEDIA_CONTROLLER */
/*
* Simplify a fraction using a simple continued fraction decomposition. The
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 63ad36f04f72..fda903bb3674 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -525,7 +525,8 @@ int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat,
/**
* v4l2_get_link_freq - Get link rate from transmitter
*
- * @handler: The transmitter's control handler
+ * @pad: The transmitter's media pad (or control handler for non-MC users or
+ * compatibility reasons, don't use in new code)
* @mul: The multiplier between pixel rate and link frequency. Bits per pixel on
* D-PHY, samples per clock on parallel. 0 otherwise.
* @div: The divisor between pixel rate and link frequency. Number of data lanes
@@ -541,8 +542,20 @@ int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat,
* * %-ENOENT: Link frequency or pixel rate control not found
* * %-EINVAL: Invalid link frequency value
*/
-s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul,
- unsigned int div);
+#ifdef CONFIG_MEDIA_CONTROLLER
+#define v4l2_get_link_freq(pad, mul, div) \
+ _Generic(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,
+ unsigned int div);
+#else
+#define v4l2_get_link_freq(handler, mul, div) \
+ __v4l2_get_link_freq_ctrl(handler, mul, div)
+#endif
+s64 __v4l2_get_link_freq_ctrl(struct v4l2_ctrl_handler *handler,
+ unsigned int mul, unsigned int div);
void v4l2_simplify_fraction(u32 *numerator, u32 *denominator,
unsigned int n_terms, unsigned int threshold);
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
Tomi
