[media] v4l2-ctrls: add new RDS TX controls

The si4713 supports several RDS features not yet implemented in the driver.

This patch adds the missing RDS functionality to the list of RDS controls.

The ALT_FREQS control is a compound control containing an array of up
to 25 (the maximum according to the RDS standard) frequencies. To support
that the V4L2_CTRL_TYPE_U32 was added.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/v4l2-core/v4l2-ctrls.c

@@ -805,6 +805,15 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_RDS_TX_PTY:		return "RDS Program Type";
 	case V4L2_CID_RDS_TX_PS_NAME:		return "RDS PS Name";
 	case V4L2_CID_RDS_TX_RADIO_TEXT:	return "RDS Radio Text";
+	case V4L2_CID_RDS_TX_MONO_STEREO:	return "RDS Stereo";
+	case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:	return "RDS Artificial Head";
+	case V4L2_CID_RDS_TX_COMPRESSED:	return "RDS Compressed";
+	case V4L2_CID_RDS_TX_DYNAMIC_PTY:	return "RDS Dynamic PTY";
+	case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
+	case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:	return "RDS Traffic Program";
+	case V4L2_CID_RDS_TX_MUSIC_SPEECH:	return "RDS Music";
+	case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:	return "RDS Enable Alt Frequencies";
+	case V4L2_CID_RDS_TX_ALT_FREQS:		return "RDS Alternate Frequencies";
 	case V4L2_CID_AUDIO_LIMITER_ENABLED:	return "Audio Limiter Feature Enabled";
 	case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
 	case V4L2_CID_AUDIO_LIMITER_DEVIATION:	return "Audio Limiter Deviation";
@@ -946,6 +955,14 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
 	case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
 	case V4L2_CID_RF_TUNER_PLL_LOCK:
+	case V4L2_CID_RDS_TX_MONO_STEREO:
+	case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
+	case V4L2_CID_RDS_TX_COMPRESSED:
+	case V4L2_CID_RDS_TX_DYNAMIC_PTY:
+	case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
+	case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
+	case V4L2_CID_RDS_TX_MUSIC_SPEECH:
+	case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
 		*type = V4L2_CTRL_TYPE_BOOLEAN;
 		*min = 0;
 		*max = *step = 1;
@@ -1089,6 +1106,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
 		*type = V4L2_CTRL_TYPE_U16;
 		break;
+	case V4L2_CID_RDS_TX_ALT_FREQS:
+		*type = V4L2_CTRL_TYPE_U32;
+		break;
 	default:
 		*type = V4L2_CTRL_TYPE_INTEGER;
 		break;
@@ -1209,6 +1229,8 @@ static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
 		return ptr1.p_u8[idx] == ptr2.p_u8[idx];
 	case V4L2_CTRL_TYPE_U16:
 		return ptr1.p_u16[idx] == ptr2.p_u16[idx];
+	case V4L2_CTRL_TYPE_U32:
+		return ptr1.p_u32[idx] == ptr2.p_u32[idx];
 	default:
 		if (ctrl->is_int)
 			return ptr1.p_s32[idx] == ptr2.p_s32[idx];
@@ -1242,6 +1264,9 @@ static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
 	case V4L2_CTRL_TYPE_U16:
 		ptr.p_u16[idx] = ctrl->default_value;
 		break;
+	case V4L2_CTRL_TYPE_U32:
+		ptr.p_u32[idx] = ctrl->default_value;
+		break;
 	default:
 		idx *= ctrl->elem_size;
 		memset(ptr.p + idx, 0, ctrl->elem_size);
@@ -1289,6 +1314,9 @@ static void std_log(const struct v4l2_ctrl *ctrl)
 	case V4L2_CTRL_TYPE_U16:
 		pr_cont("%u", (unsigned)*ptr.p_u16);
 		break;
+	case V4L2_CTRL_TYPE_U32:
+		pr_cont("%u", (unsigned)*ptr.p_u32);
+		break;
 	default:
 		pr_cont("unknown type %d", ctrl->type);
 		break;
@@ -1346,6 +1374,8 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
 		return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
 	case V4L2_CTRL_TYPE_U16:
 		return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
+	case V4L2_CTRL_TYPE_U32:
+		return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
 
 	case V4L2_CTRL_TYPE_BOOLEAN:
 		ptr.p_s32[idx] = !!ptr.p_s32[idx];
@@ -1578,6 +1608,7 @@ static int check_range(enum v4l2_ctrl_type type,
 		/* fall through */
 	case V4L2_CTRL_TYPE_U8:
 	case V4L2_CTRL_TYPE_U16:
+	case V4L2_CTRL_TYPE_U32:
 	case V4L2_CTRL_TYPE_INTEGER:
 	case V4L2_CTRL_TYPE_INTEGER64:
 		if (step == 0 || min > max || def < min || def > max)
@@ -1893,6 +1924,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 	case V4L2_CTRL_TYPE_U16:
 		elem_size = sizeof(u16);
 		break;
+	case V4L2_CTRL_TYPE_U32:
+		elem_size = sizeof(u32);
+		break;
 	default:
 		if (type < V4L2_CTRL_COMPOUND_TYPES)
 			elem_size = sizeof(s32);
@@ -3248,6 +3282,7 @@ int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
 	case V4L2_CTRL_TYPE_BITMASK:
 	case V4L2_CTRL_TYPE_U8:
 	case V4L2_CTRL_TYPE_U16:
+	case V4L2_CTRL_TYPE_U32:
 		if (ctrl->is_array)
 			return -EINVAL;
 		ret = check_range(ctrl->type, min, max, step, def);

include/media/v4l2-ctrls.h

@@ -41,6 +41,7 @@ struct poll_table_struct;
  * @p_s64:	Pointer to a 64-bit signed value.
  * @p_u8:	Pointer to a 8-bit unsigned value.
  * @p_u16:	Pointer to a 16-bit unsigned value.
+ * @p_u32:	Pointer to a 32-bit unsigned value.
  * @p_char:	Pointer to a string.
  * @p:		Pointer to a compound value.
  */
@@ -49,6 +50,7 @@ union v4l2_ctrl_ptr {
 	s64 *p_s64;
 	u8 *p_u8;
 	u16 *p_u16;
+	u32 *p_u32;
 	char *p_char;
 	void *p;
 };

include/uapi/linux/v4l2-controls.h

@@ -757,6 +757,15 @@ enum v4l2_auto_focus_range {
 #define V4L2_CID_RDS_TX_PTY			(V4L2_CID_FM_TX_CLASS_BASE + 3)
 #define V4L2_CID_RDS_TX_PS_NAME			(V4L2_CID_FM_TX_CLASS_BASE + 5)
 #define V4L2_CID_RDS_TX_RADIO_TEXT		(V4L2_CID_FM_TX_CLASS_BASE + 6)
+#define V4L2_CID_RDS_TX_MONO_STEREO		(V4L2_CID_FM_TX_CLASS_BASE + 7)
+#define V4L2_CID_RDS_TX_ARTIFICIAL_HEAD		(V4L2_CID_FM_TX_CLASS_BASE + 8)
+#define V4L2_CID_RDS_TX_COMPRESSED		(V4L2_CID_FM_TX_CLASS_BASE + 9)
+#define V4L2_CID_RDS_TX_DYNAMIC_PTY		(V4L2_CID_FM_TX_CLASS_BASE + 10)
+#define V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT	(V4L2_CID_FM_TX_CLASS_BASE + 11)
+#define V4L2_CID_RDS_TX_TRAFFIC_PROGRAM		(V4L2_CID_FM_TX_CLASS_BASE + 12)
+#define V4L2_CID_RDS_TX_MUSIC_SPEECH		(V4L2_CID_FM_TX_CLASS_BASE + 13)
+#define V4L2_CID_RDS_TX_ALT_FREQS_ENABLE	(V4L2_CID_FM_TX_CLASS_BASE + 14)
+#define V4L2_CID_RDS_TX_ALT_FREQS		(V4L2_CID_FM_TX_CLASS_BASE + 15)
 
 #define V4L2_CID_AUDIO_LIMITER_ENABLED		(V4L2_CID_FM_TX_CLASS_BASE + 64)
 #define V4L2_CID_AUDIO_LIMITER_RELEASE_TIME	(V4L2_CID_FM_TX_CLASS_BASE + 65)

include/uapi/linux/videodev2.h

@@ -1288,6 +1288,7 @@ struct v4l2_ext_control {
 		char *string;
 		__u8 *p_u8;
 		__u16 *p_u16;
+		__u32 *p_u32;
 		void *ptr;
 	};
 } __attribute__ ((packed));
@@ -1320,6 +1321,7 @@ enum v4l2_ctrl_type {
 	V4L2_CTRL_COMPOUND_TYPES     = 0x0100,
 	V4L2_CTRL_TYPE_U8	     = 0x0100,
 	V4L2_CTRL_TYPE_U16	     = 0x0101,
+	V4L2_CTRL_TYPE_U32	     = 0x0102,
 };
 
 /*  Used in the VIDIOC_QUERYCTRL ioctl for querying controls */