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-rw-r--r--drivers/media/v4l2-core/v4l2-ioctl.c9
-rw-r--r--include/media/v4l2-mediabus.h2
-rw-r--r--include/uapi/linux/v4l2-mediabus.h4
-rw-r--r--include/uapi/linux/videodev2.h41
4 files changed, 50 insertions, 6 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 368bc3a973d4..691295984225 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -257,7 +257,8 @@ static void v4l_print_format(const void *arg, bool write_only)
pr_cont(", width=%u, height=%u, "
"pixelformat=%c%c%c%c, field=%s, "
"bytesperline=%u, sizeimage=%u, colorspace=%d, "
- "flags=0x%x, ycbcr_enc=%u, quantization=%u\n",
+ "flags=0x%x, ycbcr_enc=%u, quantization=%u, "
+ "xfer_func=%u\n",
pix->width, pix->height,
(pix->pixelformat & 0xff),
(pix->pixelformat >> 8) & 0xff,
@@ -266,7 +267,7 @@ static void v4l_print_format(const void *arg, bool write_only)
prt_names(pix->field, v4l2_field_names),
pix->bytesperline, pix->sizeimage,
pix->colorspace, pix->flags, pix->ycbcr_enc,
- pix->quantization);
+ pix->quantization, pix->xfer_func);
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
@@ -274,7 +275,7 @@ static void v4l_print_format(const void *arg, bool write_only)
pr_cont(", width=%u, height=%u, "
"format=%c%c%c%c, field=%s, "
"colorspace=%d, num_planes=%u, flags=0x%x, "
- "ycbcr_enc=%u, quantization=%u\n",
+ "ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
mp->width, mp->height,
(mp->pixelformat & 0xff),
(mp->pixelformat >> 8) & 0xff,
@@ -282,7 +283,7 @@ static void v4l_print_format(const void *arg, bool write_only)
(mp->pixelformat >> 24) & 0xff,
prt_names(mp->field, v4l2_field_names),
mp->colorspace, mp->num_planes, mp->flags,
- mp->ycbcr_enc, mp->quantization);
+ mp->ycbcr_enc, mp->quantization, mp->xfer_func);
for (i = 0; i < mp->num_planes; i++)
printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
mp->plane_fmt[i].bytesperline,
diff --git a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h
index 38d960d8dccd..73069e4c2796 100644
--- a/include/media/v4l2-mediabus.h
+++ b/include/media/v4l2-mediabus.h
@@ -96,6 +96,7 @@ static inline void v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt,
pix_fmt->colorspace = mbus_fmt->colorspace;
pix_fmt->ycbcr_enc = mbus_fmt->ycbcr_enc;
pix_fmt->quantization = mbus_fmt->quantization;
+ pix_fmt->xfer_func = mbus_fmt->xfer_func;
}
static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt,
@@ -108,6 +109,7 @@ static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt,
mbus_fmt->colorspace = pix_fmt->colorspace;
mbus_fmt->ycbcr_enc = pix_fmt->ycbcr_enc;
mbus_fmt->quantization = pix_fmt->quantization;
+ mbus_fmt->xfer_func = pix_fmt->xfer_func;
mbus_fmt->code = code;
}
diff --git a/include/uapi/linux/v4l2-mediabus.h b/include/uapi/linux/v4l2-mediabus.h
index 26db20647e6f..9cac6325cc7e 100644
--- a/include/uapi/linux/v4l2-mediabus.h
+++ b/include/uapi/linux/v4l2-mediabus.h
@@ -24,6 +24,7 @@
* @colorspace: colorspace of the data (from enum v4l2_colorspace)
* @ycbcr_enc: YCbCr encoding of the data (from enum v4l2_ycbcr_encoding)
* @quantization: quantization of the data (from enum v4l2_quantization)
+ * @xfer_func: transfer function of the data (from enum v4l2_xfer_func)
*/
struct v4l2_mbus_framefmt {
__u32 width;
@@ -33,7 +34,8 @@ struct v4l2_mbus_framefmt {
__u32 colorspace;
__u16 ycbcr_enc;
__u16 quantization;
- __u32 reserved[6];
+ __u16 xfer_func;
+ __u16 reserved[11];
};
#ifndef __KERNEL__
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 003a91292a4f..3d5fc72d53a7 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -240,6 +240,42 @@ enum v4l2_colorspace {
((is_sdtv) ? V4L2_COLORSPACE_SMPTE170M : \
((is_hdtv) ? V4L2_COLORSPACE_REC709 : V4L2_COLORSPACE_SRGB))
+enum v4l2_xfer_func {
+ /*
+ * Mapping of V4L2_XFER_FUNC_DEFAULT to actual transfer functions
+ * for the various colorspaces:
+ *
+ * V4L2_COLORSPACE_SMPTE170M, V4L2_COLORSPACE_470_SYSTEM_M,
+ * V4L2_COLORSPACE_470_SYSTEM_BG, V4L2_COLORSPACE_REC709 and
+ * V4L2_COLORSPACE_BT2020: V4L2_XFER_FUNC_709
+ *
+ * V4L2_COLORSPACE_SRGB, V4L2_COLORSPACE_JPEG: V4L2_XFER_FUNC_SRGB
+ *
+ * V4L2_COLORSPACE_ADOBERGB: V4L2_XFER_FUNC_ADOBERGB
+ *
+ * V4L2_COLORSPACE_SMPTE240M: V4L2_XFER_FUNC_SMPTE240M
+ *
+ * V4L2_COLORSPACE_RAW: V4L2_XFER_FUNC_NONE
+ */
+ V4L2_XFER_FUNC_DEFAULT = 0,
+ V4L2_XFER_FUNC_709 = 1,
+ V4L2_XFER_FUNC_SRGB = 2,
+ V4L2_XFER_FUNC_ADOBERGB = 3,
+ V4L2_XFER_FUNC_SMPTE240M = 4,
+ V4L2_XFER_FUNC_NONE = 5,
+};
+
+/*
+ * Determine how XFER_FUNC_DEFAULT should map to a proper transfer function.
+ * This depends on the colorspace.
+ */
+#define V4L2_MAP_XFER_FUNC_DEFAULT(colsp) \
+ ((colsp) == V4L2_XFER_FUNC_ADOBERGB ? V4L2_XFER_FUNC_ADOBERGB : \
+ ((colsp) == V4L2_COLORSPACE_SMPTE240M ? V4L2_XFER_FUNC_SMPTE240M : \
+ ((colsp) == V4L2_COLORSPACE_RAW ? V4L2_XFER_FUNC_NONE : \
+ ((colsp) == V4L2_COLORSPACE_SRGB || (colsp) == V4L2_COLORSPACE_JPEG ? \
+ V4L2_XFER_FUNC_SRGB : V4L2_XFER_FUNC_709))))
+
enum v4l2_ycbcr_encoding {
/*
* Mapping of V4L2_YCBCR_ENC_DEFAULT to actual encodings for the
@@ -409,6 +445,7 @@ struct v4l2_pix_format {
__u32 flags; /* format flags (V4L2_PIX_FMT_FLAG_*) */
__u32 ycbcr_enc; /* enum v4l2_ycbcr_encoding */
__u32 quantization; /* enum v4l2_quantization */
+ __u32 xfer_func; /* enum v4l2_xfer_func */
};
/* Pixel format FOURCC depth Description */
@@ -1907,6 +1944,7 @@ struct v4l2_plane_pix_format {
* @flags: format flags (V4L2_PIX_FMT_FLAG_*)
* @ycbcr_enc: enum v4l2_ycbcr_encoding, Y'CbCr encoding
* @quantization: enum v4l2_quantization, colorspace quantization
+ * @xfer_func: enum v4l2_xfer_func, colorspace transfer function
*/
struct v4l2_pix_format_mplane {
__u32 width;
@@ -1920,7 +1958,8 @@ struct v4l2_pix_format_mplane {
__u8 flags;
__u8 ycbcr_enc;
__u8 quantization;
- __u8 reserved[8];
+ __u8 xfer_func;
+ __u8 reserved[7];
} __attribute__ ((packed));
/**
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.