linux-kernel - [PATCH v2 1/5] v4l: Add Qualcomm custom compressed pixel formats

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Date:   Tue,  6 Jul 2021 15:40:30 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-api@...r.kernel.org
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH v2 1/5] v4l: Add Qualcomm custom compressed pixel formats

Add custom Qualcomm raw compressed pixel formats. They are
used in Qualcomm SoCs to optimize the interconnect bandwidth.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
 .../media/v4l/pixfmt-reserved.rst              | 18 ++++++++++++++++++
 drivers/media/v4l2-core/v4l2-ioctl.c           |  2 ++
 include/uapi/linux/videodev2.h                 |  2 ++
 3 files changed, 22 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
index 0b879c0da713..136e9832db0c 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
+++ b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
@@ -260,6 +260,24 @@ please make a proposal on the linux-media mailing list.
 	of tiles, resulting in 32-aligned resolutions for the luminance plane
 	and 16-aligned resolutions for the chrominance plane (with 2x2
 	subsampling).
+    * .. _V4L2-PIX-FMT-QC08C:
+
+      - ``V4L2_PIX_FMT_QC08C``
+      - 'QC08C'
+      - Compressed Macro-tile 8-Bit YUV420 format used by Qualcomm platforms.
+	The used compression is lossless and it is used by various multimedia
+	hardware blocks like GPU, display controllers, ISP and video accelerators.
+	It contains four planes for progressive video and eight planes for
+	interlaced video.
+    * .. _V4L2-PIX-FMT-QC10C:
+
+      - ``V4L2_PIX_FMT_QC10C``
+      - 'QC10C'
+      - Compressed Macro-tile 10-Bit YUV420 format used by Qualcomm platforms.
+	The used compression is lossless and it is used by various multimedia
+	hardware blocks like GPU, display controllers, ISP and video.
+	It contains four planes for progressive video and eight planes for
+	interlaced video.
 
 .. raw:: latex
 
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 05d5db3d85e5..76d4e4ac18e8 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1416,6 +1416,8 @@ 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_QC08C:	descr = "QCOM Compressed 8-bit Format"; break;
+		case V4L2_PIX_FMT_QC10C:	descr = "QCOM Compressed 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 9260791b8438..dc1b714ccf6b 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -737,6 +737,8 @@ struct v4l2_pix_format {
 #define V4L2_PIX_FMT_SUNXI_TILED_NV12 v4l2_fourcc('S', 'T', '1', '2') /* Sunxi Tiled NV12 Format */
 #define V4L2_PIX_FMT_CNF4     v4l2_fourcc('C', 'N', 'F', '4') /* Intel 4-bit packed depth confidence information */
 #define V4L2_PIX_FMT_HI240    v4l2_fourcc('H', 'I', '2', '4') /* BTTV 8-bit dithered RGB */
+#define V4L2_PIX_FMT_QC08C    v4l2_fourcc('Q', '0', '8', 'C') /* Qualcomm 8-bit compressed */
+#define V4L2_PIX_FMT_QC10C    v4l2_fourcc('Q', '1', '0', 'C') /* Qualcomm 10-bit compressed */
 
 /* 10bit raw bayer packed, 32 bytes for every 25 pixels, last LSB 6 bits unused */
 #define V4L2_PIX_FMT_IPU3_SBGGR10	v4l2_fourcc('i', 'p', '3', 'b') /* IPU3 packed 10-bit BGGR bayer */
-- 
2.25.1