From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: linux-media@vger.kernel.org
Cc: hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com,
Wentong Wu <wentong.wu@intel.com>
Subject: [PATCH v3 1/4] media: v4l: Support passing sub-device argument to v4l2_get_link_freq()
Date: Mon, 29 Apr 2024 18:37:01 +0300 [thread overview]
Message-ID: <20240429153704.1005192-2-sakari.ailus@linux.intel.com> (raw)
In-Reply-To: <20240429153704.1005192-1-sakari.ailus@linux.intel.com>
v4l2_get_link_freq() accepts a V4L2 control handler for now, but it needs
to take struct v4l2_subdev argument in order to obtain the link frequency
using get_mbus_config() pad op. Prepare for this by allowing struct
v4l2_subdev as well.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
drivers/media/v4l2-core/v4l2-common.c | 19 ++++++++++++++++---
include/media/v4l2-common.h | 14 +++++++++++---
2 files changed, 27 insertions(+), 6 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 4165c815faef..7f69b5a025fa 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -464,8 +464,8 @@ 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;
@@ -500,7 +500,20 @@ 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);
+
+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);
/*
* 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..d7115cd61a38 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 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 +542,15 @@ 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);
+#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);
+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);
--
2.39.2
next prev parent reply other threads:[~2024-04-29 15:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 15:37 [PATCH v3 0/4] Use V4L2 mbus config for conveying MEI CSI link frequency Sakari Ailus
2024-04-29 15:37 ` Sakari Ailus [this message]
2024-04-29 15:37 ` [PATCH v3 2/4] media: v4l: Support obtaining link frequency via get_mbus_config Sakari Ailus
2024-04-29 15:37 ` [PATCH v3 3/4] media: Documentation: Update link frequency driver documentation Sakari Ailus
2024-04-29 15:37 ` [PATCH v3 4/4] media: ivsc: csi: Obtain link frequency from the media pad Sakari Ailus
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