From: Maxime Jourdan <mjourdan@xxxxxxxxxxxx>
Add two generic Compressed Framebuffer pixel formats to be used
with a modifier when imported back in another subsystem like DRM/KMS.
These pixel formats represents generic 8bits and 10bits compressed buffers
with a vendor specific layout.
These are aligned with the DRM_FORMAT_YUV420_8BIT and DRM_FORMAT_YUV420_10BIT
used to describe the underlying compressed buffers used for ARM Framebuffer
Compression. In the Amlogic case, the compression is different but the
underlying buffer components is the same.
Signed-off-by: Maxime Jourdan <mjourdan@xxxxxxxxxxxx>
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-ioctl.c | 2 ++
include/uapi/linux/videodev2.h | 9 +++++++++
2 files changed, 11 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 2322f08a98be..8f14adfd5bc5 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1447,6 +1447,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
+ case V4L2_PIX_FMT_YUV420_8BIT: descr = "Compressed YUV 4:2:0 8-bit Format"; break;
+ case V4L2_PIX_FMT_YUV420_10BIT: descr = "Compressed YUV 4:2:0 10-bit Format"; break;
default:
if (fmt->description[0])
return;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index c3a1cf1c507f..90b9949acb8a 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -705,6 +705,15 @@ struct v4l2_pix_format {
#define V4L2_PIX_FMT_FWHT v4l2_fourcc('F', 'W', 'H', 'T') /* Fast Walsh Hadamard Transform (vicodec) */
#define V4L2_PIX_FMT_FWHT_STATELESS v4l2_fourcc('S', 'F', 'W', 'H') /* Stateless FWHT (vicodec) */
+/*
+ * Compressed Luminance+Chrominance meta-formats
+ * In these formats, the component ordering is specified (Y, followed by U
+ * then V), but the exact Linear layout is undefined.
+ * These formats can only be used with a non-Linear modifier.
+ */
+#define V4L2_PIX_FMT_YUV420_8BIT v4l2_fourcc('Y', 'U', '0', '8') /* 1-plane YUV 4:2:0 8-bit */
+#define V4L2_PIX_FMT_YUV420_10BIT v4l2_fourcc('Y', 'U', '1', '0') /* 1-plane YUV 4:2:0 10-bit */
+
/* Vendor-specific formats */
#define V4L2_PIX_FMT_CPIA1 v4l2_fourcc('C', 'P', 'I', 'A') /* cpia1 YUV */
#define V4L2_PIX_FMT_WNVA v4l2_fourcc('W', 'N', 'V', 'A') /* Winnov hw compress */
--
2.22.0
