V4L/DVB (8151): saa7134-empress: fix MPEG control support

The MPEG controls could not be enumerated and so could not be read or set
through the v4l2-ctl utility or shown in control panels.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/saa7134/saa6752hs.c

@@ -448,6 +448,104 @@ static int handle_ctrl(struct saa6752hs_mpeg_params *params,
 	return 0;
 }
 
+static int saa6752hs_qctrl(struct saa6752hs_mpeg_params *params,
+		struct v4l2_queryctrl *qctrl)
+{
+	int err;
+
+	switch (qctrl->id) {
+	case V4L2_CID_MPEG_AUDIO_ENCODING:
+		return v4l2_ctrl_query_fill(qctrl,
+				V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
+				V4L2_MPEG_AUDIO_ENCODING_LAYER_2, 1,
+				V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
+
+	case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
+		return v4l2_ctrl_query_fill(qctrl,
+				V4L2_MPEG_AUDIO_L2_BITRATE_256K,
+				V4L2_MPEG_AUDIO_L2_BITRATE_384K, 1,
+				V4L2_MPEG_AUDIO_L2_BITRATE_256K);
+
+	case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
+		return v4l2_ctrl_query_fill(qctrl,
+				V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000,
+				V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000, 1,
+				V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000);
+
+	case V4L2_CID_MPEG_VIDEO_ENCODING:
+		return v4l2_ctrl_query_fill(qctrl,
+				V4L2_MPEG_VIDEO_ENCODING_MPEG_2,
+				V4L2_MPEG_VIDEO_ENCODING_MPEG_2, 1,
+				V4L2_MPEG_VIDEO_ENCODING_MPEG_2);
+
+	case V4L2_CID_MPEG_VIDEO_ASPECT:
+		return v4l2_ctrl_query_fill(qctrl,
+				V4L2_MPEG_VIDEO_ASPECT_4x3,
+				V4L2_MPEG_VIDEO_ASPECT_16x9, 1,
+				V4L2_MPEG_VIDEO_ASPECT_4x3);
+
+	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
+		err = v4l2_ctrl_query_fill_std(qctrl);
+		if (err == 0 &&
+		    params->vi_bitrate_mode ==
+				V4L2_MPEG_VIDEO_BITRATE_MODE_CBR)
+			qctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
+		return err;
+
+	case V4L2_CID_MPEG_STREAM_TYPE:
+		return v4l2_ctrl_query_fill(qctrl,
+				V4L2_MPEG_STREAM_TYPE_MPEG2_TS,
+				V4L2_MPEG_STREAM_TYPE_MPEG2_TS, 1,
+				V4L2_MPEG_STREAM_TYPE_MPEG2_TS);
+
+	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
+	case V4L2_CID_MPEG_VIDEO_BITRATE:
+	case V4L2_CID_MPEG_STREAM_PID_PMT:
+	case V4L2_CID_MPEG_STREAM_PID_AUDIO:
+	case V4L2_CID_MPEG_STREAM_PID_VIDEO:
+	case V4L2_CID_MPEG_STREAM_PID_PCR:
+		return v4l2_ctrl_query_fill_std(qctrl);
+
+	default:
+		break;
+	}
+	return -EINVAL;
+}
+
+static int saa6752hs_qmenu(struct saa6752hs_mpeg_params *params,
+		struct v4l2_querymenu *qmenu)
+{
+	static const char *mpeg_audio_l2_bitrate[] = {
+		"",
+		"",
+		"",
+		"",
+		"",
+		"",
+		"",
+		"",
+		"",
+		"",
+		"",
+		"256 kbps",
+		"",
+		"384 kbps",
+		NULL
+	};
+	struct v4l2_queryctrl qctrl;
+	int err;
+
+	qctrl.id = qmenu->id;
+	err = saa6752hs_qctrl(params, &qctrl);
+	if (err)
+		return err;
+	if (qmenu->id == V4L2_CID_MPEG_AUDIO_L2_BITRATE)
+		return v4l2_ctrl_query_menu(qmenu, &qctrl,
+				mpeg_audio_l2_bitrate);
+	return v4l2_ctrl_query_menu(qmenu, &qctrl,
+			v4l2_ctrl_get_menu(qmenu->id));
+}
+
 static int saa6752hs_init(struct i2c_client* client)
 {
 	unsigned char buf[9], buf2[4];
@@ -662,6 +760,10 @@ saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
 		}
 		h->params = params;
 		break;
+	case VIDIOC_QUERYCTRL:
+		return saa6752hs_qctrl(&h->params, arg);
+	case VIDIOC_QUERYMENU:
+		return saa6752hs_qmenu(&h->params, arg);
 	case VIDIOC_G_FMT:
 	{
 	   struct v4l2_format *f = arg;

drivers/media/video/saa7134/saa7134-empress.c

@@ -294,10 +294,20 @@ static int empress_streamoff(struct file *file, void *priv,
 	return videobuf_streamoff(&dev->empress_tsq);
 }
 
+static int saa7134_i2c_call_saa6752(struct saa7134_dev *dev,
+					      unsigned int cmd, void *arg)
+{
+	if (dev->mpeg_i2c_client == NULL)
+		return -EINVAL;
+	return dev->mpeg_i2c_client->driver->command(dev->mpeg_i2c_client,
+								cmd, arg);
+}
+
 static int empress_s_ext_ctrls(struct file *file, void *priv,
 			       struct v4l2_ext_controls *ctrls)
 {
 	struct saa7134_dev *dev = file->private_data;
+	int err;
 
 	/* count == 0 is abused in saa6752hs.c, so that special
 		case is handled here explicitly. */
@@ -307,10 +317,10 @@ static int empress_s_ext_ctrls(struct file *file, void *priv,
 	if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 		return -EINVAL;
 
-	saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, ctrls);
+	err = saa7134_i2c_call_saa6752(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 	ts_init_encoder(dev);
 
-	return 0;
+	return err;
 }
 
 static int empress_g_ext_ctrls(struct file *file, void *priv,
@@ -320,9 +330,62 @@ static int empress_g_ext_ctrls(struct file *file, void *priv,
 
 	if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 		return -EINVAL;
-	saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, ctrls);
+	return saa7134_i2c_call_saa6752(dev, VIDIOC_G_EXT_CTRLS, ctrls);
+}
 
-	return 0;
+static int empress_queryctrl(struct file *file, void *priv,
+					struct v4l2_queryctrl *c)
+{
+	static const u32 user_ctrls[] = {
+		V4L2_CID_USER_CLASS,
+		V4L2_CID_BRIGHTNESS,
+		V4L2_CID_CONTRAST,
+		V4L2_CID_SATURATION,
+		V4L2_CID_HUE,
+		V4L2_CID_AUDIO_VOLUME,
+		V4L2_CID_AUDIO_MUTE,
+		V4L2_CID_HFLIP,
+		0
+	};
+
+	static const u32 mpeg_ctrls[] = {
+		V4L2_CID_MPEG_CLASS,
+		V4L2_CID_MPEG_STREAM_TYPE,
+		V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
+		V4L2_CID_MPEG_AUDIO_ENCODING,
+		V4L2_CID_MPEG_AUDIO_L2_BITRATE,
+		V4L2_CID_MPEG_VIDEO_ENCODING,
+		V4L2_CID_MPEG_VIDEO_ASPECT,
+		V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
+		V4L2_CID_MPEG_VIDEO_BITRATE,
+		V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
+		0
+	};
+	static const u32 *ctrl_classes[] = {
+		user_ctrls,
+		mpeg_ctrls,
+		NULL
+	};
+	struct saa7134_dev *dev = file->private_data;
+
+	c->id = v4l2_ctrl_next(ctrl_classes, c->id);
+	if (c->id == 0)
+		return -EINVAL;
+	if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
+		return v4l2_ctrl_query_fill_std(c);
+	if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
+		return saa7134_queryctrl(file, priv, c);
+	return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYCTRL, c);
+}
+
+static int empress_querymenu(struct file *file, void *priv,
+					struct v4l2_querymenu *c)
+{
+	struct saa7134_dev *dev = file->private_data;
+
+	if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
+		return -EINVAL;
+	return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYMENU, c);
 }
 
 static const struct file_operations ts_fops =
@@ -363,7 +426,8 @@ static struct video_device saa7134_empress_template =
 	.vidioc_g_input			= empress_g_input,
 	.vidioc_s_input			= empress_s_input,
 
-	.vidioc_queryctrl		= saa7134_queryctrl,
+	.vidioc_queryctrl		= empress_queryctrl,
+	.vidioc_querymenu		= empress_querymenu,
 	.vidioc_g_ctrl			= saa7134_g_ctrl,
 	.vidioc_s_ctrl			= saa7134_s_ctrl,
 

drivers/media/video/saa7134/saa7134-i2c.c

@@ -327,6 +327,8 @@ static int attach_inform(struct i2c_client *client)
 
 	d1printk( "%s i2c attach [addr=0x%x,client=%s]\n",
 		client->driver->driver.name, client->addr, client->name);
+	if (client->addr == 0x20 && client->driver && client->driver->command)
+		dev->mpeg_i2c_client = client;
 
 	/* Am I an i2c remote control? */
 

drivers/media/video/saa7134/saa7134.h

@@ -553,6 +553,7 @@ struct saa7134_dev {
 	struct saa7134_ts          ts;
 	struct saa7134_dmaqueue    ts_q;
 	struct saa7134_mpeg_ops    *mops;
+	struct i2c_client 	   *mpeg_i2c_client;
 
 	/* SAA7134_MPEG_EMPRESS only */
 	struct video_device        *empress_dev;