linux-kernel - [PATCH v4 12/15] media: uapi: Create a dedicated header for Hantro control

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Date:   Mon, 28 Feb 2022 15:08:35 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     mchehab@...nel.org, ezequiel@...guardiasur.com.ar,
        p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
        mripard@...nel.org, paul.kocialkowski@...tlin.com, wens@...e.org,
        jernej.skrabec@...il.com, jonas@...boo.se, nicolas@...fresne.ca
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        kernel@...labora.com, knaerzche@...il.com, jc@...esim.co.uk,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [PATCH v4 12/15] media: uapi: Create a dedicated header for Hantro control

Hantro hardware needs a dedicated v4l2 control to perform HEVC
decoding. Move it to a dedicated header file to prepare HEVC
uAPI un-staging.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
---
version 4:
- Fix hantro-media SPDX license

 .../userspace-api/media/drivers/hantro.rst    |  5 -----
 drivers/staging/media/hantro/hantro_drv.c     |  1 +
 include/media/hevc-ctrls.h                    | 13 -------------
 include/uapi/linux/hantro-media.h             | 19 +++++++++++++++++++
 include/uapi/linux/v4l2-controls.h            |  5 +++++
 5 files changed, 25 insertions(+), 18 deletions(-)
 create mode 100644 include/uapi/linux/hantro-media.h

diff --git a/Documentation/userspace-api/media/drivers/hantro.rst b/Documentation/userspace-api/media/drivers/hantro.rst
index cd9754b4e005..78dcd2a44a03 100644
--- a/Documentation/userspace-api/media/drivers/hantro.rst
+++ b/Documentation/userspace-api/media/drivers/hantro.rst
@@ -12,8 +12,3 @@ The Hantro video decoder driver implements the following driver-specific control
     to before syntax element "slice_temporal_mvp_enabled_flag".
     If IDR, the skipped bits are just "pic_output_flag"
     (separate_colour_plane_flag is not supported).
-
-.. note::
-
-        This control is not yet part of the public kernel API and
-        it is expected to change.
diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
index 6f58c259d8fc..783a92a38c8e 100644
--- a/drivers/staging/media/hantro/hantro_drv.c
+++ b/drivers/staging/media/hantro/hantro_drv.c
@@ -11,6 +11,7 @@
  */
 
 #include <linux/clk.h>
+#include <linux/hantro-media.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
index 235a3aaebc2b..c4c88a2073ce 100644
--- a/include/media/hevc-ctrls.h
+++ b/include/media/hevc-ctrls.h
@@ -445,17 +445,4 @@ struct v4l2_ctrl_hevc_scaling_matrix {
 	__u8	scaling_list_dc_coef_32x32[2];
 };
 
-/*  MPEG-class control IDs specific to the Hantro driver as defined by V4L2 */
-#define V4L2_CID_CODEC_HANTRO_BASE				(V4L2_CTRL_CLASS_CODEC | 0x1200)
-/*
- * V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP -
- * the number of data (in bits) to skip in the
- * slice segment header.
- * If non-IDR, the bits to be skipped go from syntax element "pic_output_flag"
- * to before syntax element "slice_temporal_mvp_enabled_flag".
- * If IDR, the skipped bits are just "pic_output_flag"
- * (separate_colour_plane_flag is not supported).
- */
-#define V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP	(V4L2_CID_CODEC_HANTRO_BASE + 0)
-
 #endif
diff --git a/include/uapi/linux/hantro-media.h b/include/uapi/linux/hantro-media.h
new file mode 100644
index 000000000000..d0d48fd7de9c
--- /dev/null
+++ b/include/uapi/linux/hantro-media.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+
+#ifndef __UAPI_HANTRO_MEDIA_H__
+#define __UAPI_HANTRO_MEDIA_H__
+
+#include <linux/v4l2-controls.h>
+
+/*
+ * V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP -
+ * the number of data (in bits) to skip in the
+ * slice segment header.
+ * If non-IDR, the bits to be skipped go from syntax element "pic_output_flag"
+ * to before syntax element "slice_temporal_mvp_enabled_flag".
+ * If IDR, the skipped bits are just "pic_output_flag"
+ * (separate_colour_plane_flag is not supported).
+ */
+#define V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP	(V4L2_CID_USER_HANTRO_BASE + 0)
+
+#endif /* __UAPI_HANTRO_MEDIA_H__ */
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index c8e0f84d204d..d56a1c7fb91d 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -218,6 +218,11 @@ enum v4l2_colorfx {
  * We reserve 16 controls for this driver.
  */
 #define V4L2_CID_USER_ALLEGRO_BASE		(V4L2_CID_USER_BASE + 0x1170)
+/*
+ * The base for Hantro driver controls.
+ * We reserve 128 controls for this driver.
+ */
+#define V4L2_CID_USER_HANTRO_BASE		(V4L2_CID_USER_BASE + 0x1180)
 
 /* MPEG-class control IDs */
 /* The MPEG controls are applicable to all codec controls
-- 
2.32.0