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Code Issues Releases Wiki Activity

media: v4l: Support passing media pad argument to v4l2_get_link_freq()

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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@linux.intel.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
This commit is contained in:
Sakari Ailus 2024-04-29 11:38:23 +03:00 committed by Hans Verkuil
parent 4100f206c5
commit 15f0035bfd
2 changed files with 34 additions and 6 deletions
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21
drivers/media/v4l2-core/v4l2-common.c
View File

@ -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

17
include/media/v4l2-common.h
View File

@ -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,
#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);