Re: [PATCH v2 1/3] media: videodev2.h, v4l2-ioctl: add rkisp1 meta buffer format

From: Robin Murphy
Date: Thu Nov 05 2020 - 13:11:34 EST


On 2020-11-05 17:43, Hans Verkuil wrote:
On 30/10/2020 12:22, Helen Koike wrote:
From: Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx>

Add the Rockchip ISP1 specific processing parameter format
V4L2_META_FMT_RK_ISP1_PARAMS and metadata format
V4L2_META_FMT_RK_ISP1_STAT_3A for 3A.

Signed-off-by: Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx>
Signed-off-by: Jacob Chen <jacob2.chen@xxxxxxxxxxxxxx>
Signed-off-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>

---
Hello,

This patch is a continuation of:

https://patchwork.kernel.org/project/linux-arm-kernel/patch/20191106120132.6876-2-helen.koike@xxxxxxxxxxxxx/

These formats are already documented under
Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst

We had agreed to keep under
drivers/staging/media/rkisp1/uapi/rkisp1-config.h while the driver was
in staging, since we are moving it out of staging, I guess this is the
time :)

Regards,
Helen
---
drivers/media/v4l2-core/v4l2-ioctl.c | 2 ++
drivers/staging/media/rkisp1/uapi/rkisp1-config.h | 4 ----
include/uapi/linux/videodev2.h | 4 ++++
3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index eeff398fbdcc1..202597d031c6b 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1402,6 +1402,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break;
case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break;
case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break;
+ case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A params"; break;
+ case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A statistics"; break;

Use 'Params' and 'Statistics' to conform to the other descriptions.

Drive-by observation: "parameters" is the exact same length as "statistics". I could understand abbreviating both, or neither, but the mix just looks decidedly odd.

Robin.


Regards,

Hans

default:
/* Compressed formats */
diff --git a/drivers/staging/media/rkisp1/uapi/rkisp1-config.h b/drivers/staging/media/rkisp1/uapi/rkisp1-config.h
index 8d906cc7da8fc..6e449e7842605 100644
--- a/drivers/staging/media/rkisp1/uapi/rkisp1-config.h
+++ b/drivers/staging/media/rkisp1/uapi/rkisp1-config.h
@@ -9,10 +9,6 @@
#include <linux/types.h>
-/* Vendor specific - used for RK_ISP1 camera sub-system */
-#define V4L2_META_FMT_RK_ISP1_PARAMS v4l2_fourcc('R', 'K', '1', 'P') /* Rockchip ISP1 params */
-#define V4L2_META_FMT_RK_ISP1_STAT_3A v4l2_fourcc('R', 'K', '1', 'S') /* Rockchip ISP1 3A statistics */
-
/* Defect Pixel Cluster Detection */
#define RKISP1_CIF_ISP_MODULE_DPCC (1U << 0)
/* Black Level Subtraction */
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 534eaa4d39bc8..c2e13ba81196b 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -770,6 +770,10 @@ struct v4l2_pix_format {
#define V4L2_META_FMT_D4XX v4l2_fourcc('D', '4', 'X', 'X') /* D4XX Payload Header metadata */
#define V4L2_META_FMT_VIVID v4l2_fourcc('V', 'I', 'V', 'D') /* Vivid Metadata */
+/* Vendor specific - used for RK_ISP1 camera sub-system */
+#define V4L2_META_FMT_RK_ISP1_PARAMS v4l2_fourcc('R', 'K', '1', 'P') /* Rockchip ISP1 params */
+#define V4L2_META_FMT_RK_ISP1_STAT_3A v4l2_fourcc('R', 'K', '1', 'S') /* Rockchip ISP1 3A statistics */
+
/* priv field value to indicates that subsequent fields are valid. */
#define V4L2_PIX_FMT_PRIV_MAGIC 0xfeedcafe



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