linux-kernel - [PATCH v3 08/13] media: controls: Add the stateless codec control class

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Date:   Wed, 18 Nov 2020 15:46:55 -0300
From:   Ezequiel Garcia <ezequiel@...labora.com>
To:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     kernel@...labora.com, Jonas Karlman <jonas@...boo.se>,
        Hans Verkuil <hverkuil@...all.nl>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Maxime Ripard <mripard@...nel.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Ezequiel Garcia <ezequiel@...labora.com>
Subject: [PATCH v3 08/13] media: controls: Add the stateless codec control class

Add a new control class to hold the stateless codecs controls
that are ready to be moved out of staging.

Signed-off-by: Ezequiel Garcia <ezequiel@...labora.com>
---
 drivers/media/v4l2-core/v4l2-ctrls.c | 5 +++++
 include/uapi/linux/v4l2-controls.h   | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index adcf47bddbe3..472b46e8290b 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1181,6 +1181,10 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
 	case V4L2_CID_DETECT_MD_THRESHOLD_GRID:	return "MD Threshold Grid";
 	case V4L2_CID_DETECT_MD_REGION_GRID:	return "MD Region Grid";
+
+	/* Codec controls */
+	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
+	case V4L2_CID_CODEC_STATELESS_CLASS:	return "Stateless Codec Controls";
 	default:
 		return NULL;
 	}
@@ -1368,6 +1372,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_FM_RX_CLASS:
 	case V4L2_CID_RF_TUNER_CLASS:
 	case V4L2_CID_DETECT_CLASS:
+	case V4L2_CID_CODEC_STATELESS_CLASS:
 		*type = V4L2_CTRL_TYPE_CTRL_CLASS;
 		/* You can neither read not write these */
 		*flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 75cf87b9a377..90478ecc2f81 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -65,6 +65,7 @@
 #define V4L2_CTRL_CLASS_FM_RX		0x00a10000	/* FM Receiver controls */
 #define V4L2_CTRL_CLASS_RF_TUNER	0x00a20000	/* RF tuner controls */
 #define V4L2_CTRL_CLASS_DETECT		0x00a30000	/* Detection controls */
+#define V4L2_CTRL_CLASS_CODEC_STATELESS 0x00a40000	/* Stateless codecs controls */
 
 /* User-class control IDs */
 
@@ -1177,6 +1178,12 @@ enum v4l2_detect_md_mode {
 #define V4L2_CID_DETECT_MD_THRESHOLD_GRID	(V4L2_CID_DETECT_CLASS_BASE + 3)
 #define V4L2_CID_DETECT_MD_REGION_GRID		(V4L2_CID_DETECT_CLASS_BASE + 4)
 
+
+/*  Stateless CODECs controls */
+#define V4L2_CID_CODEC_STATELESS_BASE          (V4L2_CTRL_CLASS_CODEC_STATELESS | 0x900)
+#define V4L2_CID_CODEC_STATELESS_CLASS         (V4L2_CTRL_CLASS_CODEC_STATELESS | 1)
+
+
 /* MPEG-compression definitions kept for backwards compatibility */
 #ifndef __KERNEL__
 #define V4L2_CTRL_CLASS_MPEG            V4L2_CTRL_CLASS_CODEC
-- 
2.27.0