media: v4l: Add support for V4L2_BUF_TYPE_META_OUTPUT

The V4L2_BUF_TYPE_META_OUTPUT mirrors the V4L2_BUF_TYPE_META_CAPTURE with
the exception that it is an OUTPUT type. The use case for this is to pass
buffers to the device that are not image data but metadata. The formats,
just as the metadata capture formats, are typically device specific and
highly structured.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Tested-by: Tian Shu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

4 files changed, 34 insertions, 4 deletions

diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
index 1244c246d0c4..8e7ab0283f06 100644
--- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
+++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
@@ -704,6 +704,7 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create)
 		requested_sizes[0] = f->fmt.sdr.buffersize;
 		break;
 	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
 		requested_sizes[0] = f->fmt.meta.buffersize;
 		break;
 	default:
diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index f4325329fbd6..fe4577a46869 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -323,6 +323,7 @@ static int __get_v4l2_format32(struct v4l2_format __user *p64,
 		return copy_in_user(&p64->fmt.sdr, &p32->fmt.sdr,
 				    sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
 		return copy_in_user(&p64->fmt.meta, &p32->fmt.meta,
 				    sizeof(p64->fmt.meta)) ? -EFAULT : 0;
 	default:
@@ -392,6 +393,7 @@ static int __put_v4l2_format32(struct v4l2_format __user *p64,
 		return copy_in_user(&p32->fmt.sdr, &p64->fmt.sdr,
 				    sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
 		return copy_in_user(&p32->fmt.meta, &p64->fmt.meta,
 				    sizeof(p64->fmt.meta)) ? -EFAULT : 0;
 	default:
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index 2130e3a0f4da..d7528f82a66a 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -597,7 +597,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
 			       ops->vidioc_enum_fmt_vid_overlay ||
 			       ops->vidioc_enum_fmt_meta_cap)) ||
 		    (is_tx && (ops->vidioc_enum_fmt_vid_out ||
-			       ops->vidioc_enum_fmt_vid_out_mplane)))
+			       ops->vidioc_enum_fmt_vid_out_mplane ||
+			       ops->vidioc_enum_fmt_meta_out)))
 			set_bit(_IOC_NR(VIDIOC_ENUM_FMT), valid_ioctls);
 		if ((is_rx && (ops->vidioc_g_fmt_vid_cap ||
 			       ops->vidioc_g_fmt_vid_cap_mplane ||
@@ -605,7 +606,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
 			       ops->vidioc_g_fmt_meta_cap)) ||
 		    (is_tx && (ops->vidioc_g_fmt_vid_out ||
 			       ops->vidioc_g_fmt_vid_out_mplane ||
-			       ops->vidioc_g_fmt_vid_out_overlay)))
+			       ops->vidioc_g_fmt_vid_out_overlay ||
+			       ops->vidioc_g_fmt_meta_out)))
 			 set_bit(_IOC_NR(VIDIOC_G_FMT), valid_ioctls);
 		if ((is_rx && (ops->vidioc_s_fmt_vid_cap ||
 			       ops->vidioc_s_fmt_vid_cap_mplane ||
@@ -613,7 +615,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
 			       ops->vidioc_s_fmt_meta_cap)) ||
 		    (is_tx && (ops->vidioc_s_fmt_vid_out ||
 			       ops->vidioc_s_fmt_vid_out_mplane ||
-			       ops->vidioc_s_fmt_vid_out_overlay)))
+			       ops->vidioc_s_fmt_vid_out_overlay ||
+			       ops->vidioc_s_fmt_meta_out)))
 			 set_bit(_IOC_NR(VIDIOC_S_FMT), valid_ioctls);
 		if ((is_rx && (ops->vidioc_try_fmt_vid_cap ||
 			       ops->vidioc_try_fmt_vid_cap_mplane ||
@@ -621,7 +624,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
 			       ops->vidioc_try_fmt_meta_cap)) ||
 		    (is_tx && (ops->vidioc_try_fmt_vid_out ||
 			       ops->vidioc_try_fmt_vid_out_mplane ||
-			       ops->vidioc_try_fmt_vid_out_overlay)))
+			       ops->vidioc_try_fmt_vid_out_overlay ||
+			       ops->vidioc_try_fmt_meta_out)))
 			 set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
 		SET_VALID_IOCTL(ops, VIDIOC_OVERLAY, vidioc_overlay);
 		SET_VALID_IOCTL(ops, VIDIOC_G_FBUF, vidioc_g_fbuf);
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index ef58bc31bfde..1441a73ce64c 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -194,6 +194,7 @@ const char *v4l2_type_names[] = {
 	[V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 	[V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 	[V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
+	[V4L2_BUF_TYPE_META_OUTPUT]	   = "meta-out",
 };
 EXPORT_SYMBOL(v4l2_type_names);
 
@@ -366,6 +367,7 @@ static void v4l_print_format(const void *arg, bool write_only)
 			(sdr->pixelformat >> 24) & 0xff);
 		break;
 	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
 		meta = &p->fmt.meta;
 		pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 			(meta->dataformat >>  0) & 0xff,
@@ -999,6 +1001,10 @@ static int check_fmt(struct file *file, enum v4l2_buf_type type)
 		if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
 			return 0;
 		break;
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		if (is_vid && is_tx && ops->vidioc_g_fmt_meta_out)
+			return 0;
+		break;
 	default:
 		break;
 	}
@@ -1410,6 +1416,11 @@ static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
 			break;
 		ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
 		break;
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		if (unlikely(!ops->vidioc_enum_fmt_meta_out))
+			break;
+		ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
+		break;
 	}
 	if (ret == 0)
 		v4l_fill_fmtdesc(p);
@@ -1488,6 +1499,8 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
 		return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
 	case V4L2_BUF_TYPE_META_CAPTURE:
 		return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		return ops->vidioc_g_fmt_meta_out(file, fh, arg);
 	}
 	return -EINVAL;
 }
@@ -1601,6 +1614,11 @@ static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
 			break;
 		CLEAR_AFTER_FIELD(p, fmt.meta);
 		return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		if (unlikely(!ops->vidioc_s_fmt_meta_out))
+			break;
+		CLEAR_AFTER_FIELD(p, fmt.meta);
+		return ops->vidioc_s_fmt_meta_out(file, fh, arg);
 	}
 	return -EINVAL;
 }
@@ -1693,6 +1711,11 @@ static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
 			break;
 		CLEAR_AFTER_FIELD(p, fmt.meta);
 		return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		if (unlikely(!ops->vidioc_try_fmt_meta_out))
+			break;
+		CLEAR_AFTER_FIELD(p, fmt.meta);
+		return ops->vidioc_try_fmt_meta_out(file, fh, arg);
 	}
 	return -EINVAL;
 }