Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1146 insertions, 0 deletions

diff --git a/drivers/media/pci/saa7164/saa7164-encoder.c b/drivers/media/pci/saa7164/saa7164-encoder.c
new file mode 100644
index 000000000..c1b6a0596
--- /dev/null
+++ b/drivers/media/pci/saa7164/saa7164-encoder.c
@@ -0,0 +1,1146 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Driver for the NXP SAA7164 PCIe bridge
+ *
+ *  Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
+ */
+
+#include "saa7164.h"
+
+#define ENCODER_MAX_BITRATE 6500000
+#define ENCODER_MIN_BITRATE 1000000
+#define ENCODER_DEF_BITRATE 5000000
+
+/*
+ * This is a dummy non-zero value for the sizeimage field of v4l2_pix_format.
+ * It is not actually used for anything since this driver does not support
+ * stream I/O, only read(), and because this driver produces an MPEG stream
+ * and not discrete frames. But the V4L2 spec doesn't allow for this value
+ * to be 0, so set it to 0x10000 instead.
+ *
+ * If we ever change this driver to support stream I/O, then this field
+ * will be the size of the streaming buffers.
+ */
+#define SAA7164_SIZEIMAGE (0x10000)
+
+static struct saa7164_tvnorm saa7164_tvnorms[] = {
+	{
+		.name      = "NTSC-M",
+		.id        = V4L2_STD_NTSC_M,
+	}, {
+		.name      = "NTSC-JP",
+		.id        = V4L2_STD_NTSC_M_JP,
+	}
+};
+
+/* Take the encoder configuration form the port struct and
+ * flush it to the hardware.
+ */
+static void saa7164_encoder_configure(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	dprintk(DBGLVL_ENC, "%s()\n", __func__);
+
+	port->encoder_params.width = port->width;
+	port->encoder_params.height = port->height;
+	port->encoder_params.is_50hz =
+		(port->encodernorm.id & V4L2_STD_625_50) != 0;
+
+	/* Set up the DIF (enable it) for analog mode by default */
+	saa7164_api_initialize_dif(port);
+
+	/* Configure the correct video standard */
+	saa7164_api_configure_dif(port, port->encodernorm.id);
+
+	/* Ensure the audio decoder is correct configured */
+	saa7164_api_set_audio_std(port);
+}
+
+static int saa7164_encoder_buffers_dealloc(struct saa7164_port *port)
+{
+	struct list_head *c, *n, *p, *q, *l, *v;
+	struct saa7164_dev *dev = port->dev;
+	struct saa7164_buffer *buf;
+	struct saa7164_user_buffer *ubuf;
+
+	/* Remove any allocated buffers */
+	mutex_lock(&port->dmaqueue_lock);
+
+	dprintk(DBGLVL_ENC, "%s(port=%d) dmaqueue\n", __func__, port->nr);
+	list_for_each_safe(c, n, &port->dmaqueue.list) {
+		buf = list_entry(c, struct saa7164_buffer, list);
+		list_del(c);
+		saa7164_buffer_dealloc(buf);
+	}
+
+	dprintk(DBGLVL_ENC, "%s(port=%d) used\n", __func__, port->nr);
+	list_for_each_safe(p, q, &port->list_buf_used.list) {
+		ubuf = list_entry(p, struct saa7164_user_buffer, list);
+		list_del(p);
+		saa7164_buffer_dealloc_user(ubuf);
+	}
+
+	dprintk(DBGLVL_ENC, "%s(port=%d) free\n", __func__, port->nr);
+	list_for_each_safe(l, v, &port->list_buf_free.list) {
+		ubuf = list_entry(l, struct saa7164_user_buffer, list);
+		list_del(l);
+		saa7164_buffer_dealloc_user(ubuf);
+	}
+
+	mutex_unlock(&port->dmaqueue_lock);
+	dprintk(DBGLVL_ENC, "%s(port=%d) done\n", __func__, port->nr);
+
+	return 0;
+}
+
+/* Dynamic buffer switch at encoder start time */
+static int saa7164_encoder_buffers_alloc(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	struct saa7164_buffer *buf;
+	struct saa7164_user_buffer *ubuf;
+	struct tmHWStreamParameters *params = &port->hw_streamingparams;
+	int result = -ENODEV, i;
+	int len = 0;
+
+	dprintk(DBGLVL_ENC, "%s()\n", __func__);
+
+	if (port->encoder_params.stream_type ==
+		V4L2_MPEG_STREAM_TYPE_MPEG2_PS) {
+		dprintk(DBGLVL_ENC,
+			"%s() type=V4L2_MPEG_STREAM_TYPE_MPEG2_PS\n",
+			__func__);
+		params->samplesperline = 128;
+		params->numberoflines = 256;
+		params->pitch = 128;
+		params->numpagetables = 2 +
+			((SAA7164_PS_NUMBER_OF_LINES * 128) / PAGE_SIZE);
+	} else
+	if (port->encoder_params.stream_type ==
+		V4L2_MPEG_STREAM_TYPE_MPEG2_TS) {
+		dprintk(DBGLVL_ENC,
+			"%s() type=V4L2_MPEG_STREAM_TYPE_MPEG2_TS\n",
+			__func__);
+		params->samplesperline = 188;
+		params->numberoflines = 312;
+		params->pitch = 188;
+		params->numpagetables = 2 +
+			((SAA7164_TS_NUMBER_OF_LINES * 188) / PAGE_SIZE);
+	} else
+		BUG();
+
+	/* Init and establish defaults */
+	params->bitspersample = 8;
+	params->linethreshold = 0;
+	params->pagetablelistvirt = NULL;
+	params->pagetablelistphys = NULL;
+	params->numpagetableentries = port->hwcfg.buffercount;
+
+	/* Allocate the PCI resources, buffers (hard) */
+	for (i = 0; i < port->hwcfg.buffercount; i++) {
+		buf = saa7164_buffer_alloc(port,
+			params->numberoflines *
+			params->pitch);
+
+		if (!buf) {
+			printk(KERN_ERR "%s() failed (errno = %d), unable to allocate buffer\n",
+				__func__, result);
+			result = -ENOMEM;
+			goto failed;
+		} else {
+
+			mutex_lock(&port->dmaqueue_lock);
+			list_add_tail(&buf->list, &port->dmaqueue.list);
+			mutex_unlock(&port->dmaqueue_lock);
+
+		}
+	}
+
+	/* Allocate some kernel buffers for copying
+	 * to userpsace.
+	 */
+	len = params->numberoflines * params->pitch;
+
+	if (encoder_buffers < 16)
+		encoder_buffers = 16;
+	if (encoder_buffers > 512)
+		encoder_buffers = 512;
+
+	for (i = 0; i < encoder_buffers; i++) {
+
+		ubuf = saa7164_buffer_alloc_user(dev, len);
+		if (ubuf) {
+			mutex_lock(&port->dmaqueue_lock);
+			list_add_tail(&ubuf->list, &port->list_buf_free.list);
+			mutex_unlock(&port->dmaqueue_lock);
+		}
+
+	}
+
+	result = 0;
+
+failed:
+	return result;
+}
+
+static int saa7164_encoder_initialize(struct saa7164_port *port)
+{
+	saa7164_encoder_configure(port);
+	return 0;
+}
+
+/* -- V4L2 --------------------------------------------------------- */
+int saa7164_s_std(struct saa7164_port *port, v4l2_std_id id)
+{
+	struct saa7164_dev *dev = port->dev;
+	unsigned int i;
+
+	dprintk(DBGLVL_ENC, "%s(id=0x%x)\n", __func__, (u32)id);
+
+	for (i = 0; i < ARRAY_SIZE(saa7164_tvnorms); i++) {
+		if (id & saa7164_tvnorms[i].id)
+			break;
+	}
+	if (i == ARRAY_SIZE(saa7164_tvnorms))
+		return -EINVAL;
+
+	port->encodernorm = saa7164_tvnorms[i];
+	port->std = id;
+
+	/* Update the audio decoder while is not running in
+	 * auto detect mode.
+	 */
+	saa7164_api_set_audio_std(port);
+
+	dprintk(DBGLVL_ENC, "%s(id=0x%x) OK\n", __func__, (u32)id);
+
+	return 0;
+}
+
+static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+
+	return saa7164_s_std(fh->port, id);
+}
+
+int saa7164_g_std(struct saa7164_port *port, v4l2_std_id *id)
+{
+	*id = port->std;
+	return 0;
+}
+
+static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+
+	return saa7164_g_std(fh->port, id);
+}
+
+int saa7164_enum_input(struct file *file, void *priv, struct v4l2_input *i)
+{
+	static const char * const inputs[] = {
+		"tuner", "composite", "svideo", "aux",
+		"composite 2", "svideo 2", "aux 2"
+	};
+	int n;
+
+	if (i->index >= 7)
+		return -EINVAL;
+
+	strscpy(i->name, inputs[i->index], sizeof(i->name));
+
+	if (i->index == 0)
+		i->type = V4L2_INPUT_TYPE_TUNER;
+	else
+		i->type  = V4L2_INPUT_TYPE_CAMERA;
+
+	for (n = 0; n < ARRAY_SIZE(saa7164_tvnorms); n++)
+		i->std |= saa7164_tvnorms[n].id;
+
+	return 0;
+}
+
+int saa7164_g_input(struct saa7164_port *port, unsigned int *i)
+{
+	struct saa7164_dev *dev = port->dev;
+
+	if (saa7164_api_get_videomux(port) != SAA_OK)
+		return -EIO;
+
+	*i = (port->mux_input - 1);
+
+	dprintk(DBGLVL_ENC, "%s() input=%d\n", __func__, *i);
+
+	return 0;
+}
+
+static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+
+	return saa7164_g_input(fh->port, i);
+}
+
+int saa7164_s_input(struct saa7164_port *port, unsigned int i)
+{
+	struct saa7164_dev *dev = port->dev;
+
+	dprintk(DBGLVL_ENC, "%s() input=%d\n", __func__, i);
+
+	if (i >= 7)
+		return -EINVAL;
+
+	port->mux_input = i + 1;
+
+	if (saa7164_api_set_videomux(port) != SAA_OK)
+		return -EIO;
+
+	return 0;
+}
+
+static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+
+	return saa7164_s_input(fh->port, i);
+}
+
+int saa7164_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+	struct saa7164_port *port = fh->port;
+	struct saa7164_dev *dev = port->dev;
+
+	if (0 != t->index)
+		return -EINVAL;
+
+	strscpy(t->name, "tuner", sizeof(t->name));
+	t->capability = V4L2_TUNER_CAP_NORM | V4L2_TUNER_CAP_STEREO;
+	t->rangelow = SAA7164_TV_MIN_FREQ;
+	t->rangehigh = SAA7164_TV_MAX_FREQ;
+
+	dprintk(DBGLVL_ENC, "VIDIOC_G_TUNER: tuner type %d\n", t->type);
+
+	return 0;
+}
+
+int saa7164_s_tuner(struct file *file, void *priv,
+			   const struct v4l2_tuner *t)
+{
+	if (0 != t->index)
+		return -EINVAL;
+
+	/* Update the A/V core */
+	return 0;
+}
+
+int saa7164_g_frequency(struct saa7164_port *port, struct v4l2_frequency *f)
+{
+	if (f->tuner)
+		return -EINVAL;
+
+	f->frequency = port->freq;
+	return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+	struct v4l2_frequency *f)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+
+	return saa7164_g_frequency(fh->port, f);
+}
+
+int saa7164_s_frequency(struct saa7164_port *port,
+			const struct v4l2_frequency *f)
+{
+	struct saa7164_dev *dev = port->dev;
+	struct saa7164_port *tsport;
+	struct dvb_frontend *fe;
+
+	/* TODO: Pull this for the std */
+	struct analog_parameters params = {
+		.mode      = V4L2_TUNER_ANALOG_TV,
+		.audmode   = V4L2_TUNER_MODE_STEREO,
+		.std       = port->encodernorm.id,
+		.frequency = f->frequency
+	};
+
+	/* Stop the encoder */
+	dprintk(DBGLVL_ENC, "%s() frequency=%d tuner=%d\n", __func__,
+		f->frequency, f->tuner);
+
+	if (f->tuner != 0)
+		return -EINVAL;
+
+	port->freq = clamp(f->frequency,
+			   SAA7164_TV_MIN_FREQ, SAA7164_TV_MAX_FREQ);
+
+	/* Update the hardware */
+	if (port->nr == SAA7164_PORT_ENC1)
+		tsport = &dev->ports[SAA7164_PORT_TS1];
+	else if (port->nr == SAA7164_PORT_ENC2)
+		tsport = &dev->ports[SAA7164_PORT_TS2];
+	else
+		BUG();
+
+	fe = tsport->dvb.frontend;
+
+	if (fe && fe->ops.tuner_ops.set_analog_params)
+		fe->ops.tuner_ops.set_analog_params(fe, &params);
+	else
+		printk(KERN_ERR "%s() No analog tuner, aborting\n", __func__);
+
+	saa7164_encoder_initialize(port);
+
+	return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+			      const struct v4l2_frequency *f)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+
+	return saa7164_s_frequency(fh->port, f);
+}
+
+static int saa7164_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct saa7164_port *port =
+		container_of(ctrl->handler, struct saa7164_port, ctrl_handler);
+	struct saa7164_encoder_params *params = &port->encoder_params;
+	int ret = 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		port->ctl_brightness = ctrl->val;
+		saa7164_api_set_usercontrol(port, PU_BRIGHTNESS_CONTROL);
+		break;
+	case V4L2_CID_CONTRAST:
+		port->ctl_contrast = ctrl->val;
+		saa7164_api_set_usercontrol(port, PU_CONTRAST_CONTROL);
+		break;
+	case V4L2_CID_SATURATION:
+		port->ctl_saturation = ctrl->val;
+		saa7164_api_set_usercontrol(port, PU_SATURATION_CONTROL);
+		break;
+	case V4L2_CID_HUE:
+		port->ctl_hue = ctrl->val;
+		saa7164_api_set_usercontrol(port, PU_HUE_CONTROL);
+		break;
+	case V4L2_CID_SHARPNESS:
+		port->ctl_sharpness = ctrl->val;
+		saa7164_api_set_usercontrol(port, PU_SHARPNESS_CONTROL);
+		break;
+	case V4L2_CID_AUDIO_VOLUME:
+		port->ctl_volume = ctrl->val;
+		saa7164_api_set_audio_volume(port, port->ctl_volume);
+		break;
+	case V4L2_CID_MPEG_VIDEO_BITRATE:
+		params->bitrate = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_STREAM_TYPE:
+		params->stream_type = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_AUDIO_MUTE:
+		params->ctl_mute = ctrl->val;
+		ret = saa7164_api_audio_mute(port, params->ctl_mute);
+		if (ret != SAA_OK) {
+			printk(KERN_ERR "%s() error, ret = 0x%x\n", __func__,
+				ret);
+			ret = -EIO;
+		}
+		break;
+	case V4L2_CID_MPEG_VIDEO_ASPECT:
+		params->ctl_aspect = ctrl->val;
+		ret = saa7164_api_set_aspect_ratio(port);
+		if (ret != SAA_OK) {
+			printk(KERN_ERR "%s() error, ret = 0x%x\n", __func__,
+				ret);
+			ret = -EIO;
+		}
+		break;
+	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
+		params->bitrate_mode = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_VIDEO_B_FRAMES:
+		params->refdist = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
+		params->bitrate_peak = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
+		params->gop_size = ctrl->val;
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int vidioc_querycap(struct file *file, void  *priv,
+	struct v4l2_capability *cap)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+	struct saa7164_port *port = fh->port;
+	struct saa7164_dev *dev = port->dev;
+
+	strscpy(cap->driver, dev->name, sizeof(cap->driver));
+	strscpy(cap->card, saa7164_boards[dev->board].name,
+		sizeof(cap->card));
+	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
+			    V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE |
+			    V4L2_CAP_DEVICE_CAPS;
+	return 0;
+}
+
+static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
+	struct v4l2_fmtdesc *f)
+{
+	if (f->index != 0)
+		return -EINVAL;
+
+	f->pixelformat = V4L2_PIX_FMT_MPEG;
+
+	return 0;
+}
+
+static int vidioc_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+	struct saa7164_port *port = fh->port;
+
+	f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
+	f->fmt.pix.bytesperline = 0;
+	f->fmt.pix.sizeimage    = SAA7164_SIZEIMAGE;
+	f->fmt.pix.field        = V4L2_FIELD_INTERLACED;
+	f->fmt.pix.colorspace   = V4L2_COLORSPACE_SMPTE170M;
+	f->fmt.pix.width        = port->width;
+	f->fmt.pix.height       = port->height;
+	return 0;
+}
+
+static int saa7164_encoder_stop_port(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	int ret;
+
+	ret = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
+	if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
+		printk(KERN_ERR "%s() stop transition failed, ret = 0x%x\n",
+			__func__, ret);
+		ret = -EIO;
+	} else {
+		dprintk(DBGLVL_ENC, "%s()    Stopped\n", __func__);
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static int saa7164_encoder_acquire_port(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	int ret;
+
+	ret = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE);
+	if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
+		printk(KERN_ERR "%s() acquire transition failed, ret = 0x%x\n",
+			__func__, ret);
+		ret = -EIO;
+	} else {
+		dprintk(DBGLVL_ENC, "%s() Acquired\n", __func__);
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static int saa7164_encoder_pause_port(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	int ret;
+
+	ret = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE);
+	if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
+		printk(KERN_ERR "%s() pause transition failed, ret = 0x%x\n",
+			__func__, ret);
+		ret = -EIO;
+	} else {
+		dprintk(DBGLVL_ENC, "%s()   Paused\n", __func__);
+		ret = 0;
+	}
+
+	return ret;
+}
+
+/* Firmware is very windows centric, meaning you have to transition
+ * the part through AVStream / KS Windows stages, forwards or backwards.
+ * States are: stopped, acquired (h/w), paused, started.
+ * We have to leave here will all of the soft buffers on the free list,
+ * else the cfg_post() func won't have soft buffers to correctly configure.
+ */
+static int saa7164_encoder_stop_streaming(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	struct saa7164_buffer *buf;
+	struct saa7164_user_buffer *ubuf;
+	struct list_head *c, *n;
+	int ret;
+
+	dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
+
+	ret = saa7164_encoder_pause_port(port);
+	ret = saa7164_encoder_acquire_port(port);
+	ret = saa7164_encoder_stop_port(port);
+
+	dprintk(DBGLVL_ENC, "%s(port=%d) Hardware stopped\n", __func__,
+		port->nr);
+
+	/* Reset the state of any allocated buffer resources */
+	mutex_lock(&port->dmaqueue_lock);
+
+	/* Reset the hard and soft buffer state */
+	list_for_each_safe(c, n, &port->dmaqueue.list) {
+		buf = list_entry(c, struct saa7164_buffer, list);
+		buf->flags = SAA7164_BUFFER_FREE;
+		buf->pos = 0;
+	}
+
+	list_for_each_safe(c, n, &port->list_buf_used.list) {
+		ubuf = list_entry(c, struct saa7164_user_buffer, list);
+		ubuf->pos = 0;
+		list_move_tail(&ubuf->list, &port->list_buf_free.list);
+	}
+
+	mutex_unlock(&port->dmaqueue_lock);
+
+	/* Free any allocated resources */
+	saa7164_encoder_buffers_dealloc(port);
+
+	dprintk(DBGLVL_ENC, "%s(port=%d) Released\n", __func__, port->nr);
+
+	return ret;
+}
+
+static int saa7164_encoder_start_streaming(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	int result, ret = 0;
+
+	dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
+
+	port->done_first_interrupt = 0;
+
+	/* allocate all of the PCIe DMA buffer resources on the fly,
+	 * allowing switching between TS and PS payloads without
+	 * requiring a complete driver reload.
+	 */
+	saa7164_encoder_buffers_alloc(port);
+
+	/* Configure the encoder with any cache values */
+	saa7164_api_set_encoder(port);
+	saa7164_api_get_encoder(port);
+
+	/* Place the empty buffers on the hardware */
+	saa7164_buffer_cfg_port(port);
+
+	/* Acquire the hardware */
+	result = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE);
+	if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
+		printk(KERN_ERR "%s() acquire transition failed, res = 0x%x\n",
+			__func__, result);
+
+		/* Stop the hardware, regardless */
+		result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
+		if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
+			printk(KERN_ERR "%s() acquire/forced stop transition failed, res = 0x%x\n",
+			       __func__, result);
+		}
+		ret = -EIO;
+		goto out;
+	} else
+		dprintk(DBGLVL_ENC, "%s()   Acquired\n", __func__);
+
+	/* Pause the hardware */
+	result = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE);
+	if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
+		printk(KERN_ERR "%s() pause transition failed, res = 0x%x\n",
+				__func__, result);
+
+		/* Stop the hardware, regardless */
+		result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
+		if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
+			printk(KERN_ERR "%s() pause/forced stop transition failed, res = 0x%x\n",
+			       __func__, result);
+		}
+
+		ret = -EIO;
+		goto out;
+	} else
+		dprintk(DBGLVL_ENC, "%s()   Paused\n", __func__);
+
+	/* Start the hardware */
+	result = saa7164_api_transition_port(port, SAA_DMASTATE_RUN);
+	if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
+		printk(KERN_ERR "%s() run transition failed, result = 0x%x\n",
+				__func__, result);
+
+		/* Stop the hardware, regardless */
+		result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
+		if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
+			printk(KERN_ERR "%s() run/forced stop transition failed, res = 0x%x\n",
+			       __func__, result);
+		}
+
+		ret = -EIO;
+	} else
+		dprintk(DBGLVL_ENC, "%s()   Running\n", __func__);
+
+out:
+	return ret;
+}
+
+static int fops_open(struct file *file)
+{
+	struct saa7164_dev *dev;
+	struct saa7164_port *port;
+	struct saa7164_encoder_fh *fh;
+
+	port = (struct saa7164_port *)video_get_drvdata(video_devdata(file));
+	if (!port)
+		return -ENODEV;
+
+	dev = port->dev;
+
+	dprintk(DBGLVL_ENC, "%s()\n", __func__);
+
+	/* allocate + initialize per filehandle data */
+	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
+	if (NULL == fh)
+		return -ENOMEM;
+
+	fh->port = port;
+	v4l2_fh_init(&fh->fh, video_devdata(file));
+	v4l2_fh_add(&fh->fh);
+	file->private_data = fh;
+
+	return 0;
+}
+
+static int fops_release(struct file *file)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+	struct saa7164_port *port = fh->port;
+	struct saa7164_dev *dev = port->dev;
+
+	dprintk(DBGLVL_ENC, "%s()\n", __func__);
+
+	/* Shut device down on last close */
+	if (atomic_cmpxchg(&fh->v4l_reading, 1, 0) == 1) {
+		if (atomic_dec_return(&port->v4l_reader_count) == 0) {
+			/* stop mpeg capture then cancel buffers */
+			saa7164_encoder_stop_streaming(port);
+		}
+	}
+
+	v4l2_fh_del(&fh->fh);
+	v4l2_fh_exit(&fh->fh);
+	kfree(fh);
+
+	return 0;
+}
+
+static struct
+saa7164_user_buffer *saa7164_enc_next_buf(struct saa7164_port *port)
+{
+	struct saa7164_user_buffer *ubuf = NULL;
+	struct saa7164_dev *dev = port->dev;
+	u32 crc;
+
+	mutex_lock(&port->dmaqueue_lock);
+	if (!list_empty(&port->list_buf_used.list)) {
+		ubuf = list_first_entry(&port->list_buf_used.list,
+			struct saa7164_user_buffer, list);
+
+		if (crc_checking) {
+			crc = crc32(0, ubuf->data, ubuf->actual_size);
+			if (crc != ubuf->crc) {
+				printk(KERN_ERR
+		"%s() ubuf %p crc became invalid, was 0x%x became 0x%x\n",
+					__func__,
+					ubuf, ubuf->crc, crc);
+			}
+		}
+
+	}
+	mutex_unlock(&port->dmaqueue_lock);
+
+	dprintk(DBGLVL_ENC, "%s() returns %p\n", __func__, ubuf);
+
+	return ubuf;
+}
+
+static ssize_t fops_read(struct file *file, char __user *buffer,
+	size_t count, loff_t *pos)
+{
+	struct saa7164_encoder_fh *fh = file->private_data;
+	struct saa7164_port *port = fh->port;
+	struct saa7164_user_buffer *ubuf = NULL;
+	struct saa7164_dev *dev = port->dev;
+	int ret = 0;
+	int rem, cnt;
+	u8 *p;
+
+	port->last_read_msecs_diff = port->last_read_msecs;
+	port->last_read_msecs = jiffies_to_msecs(jiffies);
+	port->last_read_msecs_diff = port->last_read_msecs -
+		port->last_read_msecs_diff;
+
+	saa7164_histogram_update(&port->read_interval,
+		port->last_read_msecs_diff);
+
+	if (*pos) {
+		printk(KERN_ERR "%s() ESPIPE\n", __func__);
+		return -ESPIPE;
+	}
+
+	if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) {
+		if (atomic_inc_return(&port->v4l_reader_count) == 1) {
+
+			if (saa7164_encoder_initialize(port) < 0) {
+				printk(KERN_ERR "%s() EINVAL\n", __func__);
+				return -EINVAL;
+			}
+
+			saa7164_encoder_start_streaming(port);
+			msleep(200);
+		}
+	}
+
+	/* blocking wait for buffer */
+	if ((file->f_flags & O_NONBLOCK) == 0) {
+		if (wait_event_interruptible(port->wait_read,
+			saa7164_enc_next_buf(port))) {
+				printk(KERN_ERR "%s() ERESTARTSYS\n", __func__);
+				return -ERESTARTSYS;
+		}
+	}
+
+	/* Pull the first buffer from the used list */
+	ubuf = saa7164_enc_next_buf(port);
+
+	while ((count > 0) && ubuf) {
+
+		/* set remaining bytes to copy */
+		rem = ubuf->actual_size - ubuf->pos;
+		cnt = rem > count ? count : rem;
+
+		p = ubuf->data + ubuf->pos;
+
+		dprintk(DBGLVL_ENC,
+			"%s() count=%d cnt=%d rem=%d buf=%p buf->pos=%d\n",
+			__func__, (int)count, cnt, rem, ubuf, ubuf->pos);
+
+		if (copy_to_user(buffer, p, cnt)) {
+			printk(KERN_ERR "%s() copy_to_user failed\n", __func__);
+			if (!ret) {
+				printk(KERN_ERR "%s() EFAULT\n", __func__);
+				ret = -EFAULT;
+			}
+			goto err;
+		}
+
+		ubuf->pos += cnt;
+		count -= cnt;
+		buffer += cnt;
+		ret += cnt;
+
+		if (ubuf->pos > ubuf->actual_size)
+			printk(KERN_ERR "read() pos > actual, huh?\n");
+
+		if (ubuf->pos == ubuf->actual_size) {
+
+			/* finished with current buffer, take next buffer */
+
+			/* Requeue the buffer on the free list */
+			ubuf->pos = 0;
+
+			mutex_lock(&port->dmaqueue_lock);
+			list_move_tail(&ubuf->list, &port->list_buf_free.list);
+			mutex_unlock(&port->dmaqueue_lock);
+
+			/* Dequeue next */
+			if ((file->f_flags & O_NONBLOCK) == 0) {
+				if (wait_event_interruptible(port->wait_read,
+					saa7164_enc_next_buf(port))) {
+						break;
+				}
+			}
+			ubuf = saa7164_enc_next_buf(port);
+		}
+	}
+err:
+	if (!ret && !ubuf)
+		ret = -EAGAIN;
+
+	return ret;
+}
+
+static __poll_t fops_poll(struct file *file, poll_table *wait)
+{
+	__poll_t req_events = poll_requested_events(wait);
+	struct saa7164_encoder_fh *fh =
+		(struct saa7164_encoder_fh *)file->private_data;
+	struct saa7164_port *port = fh->port;
+	__poll_t mask = v4l2_ctrl_poll(file, wait);
+
+	port->last_poll_msecs_diff = port->last_poll_msecs;
+	port->last_poll_msecs = jiffies_to_msecs(jiffies);
+	port->last_poll_msecs_diff = port->last_poll_msecs -
+		port->last_poll_msecs_diff;
+
+	saa7164_histogram_update(&port->poll_interval,
+		port->last_poll_msecs_diff);
+
+	if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
+		return mask;
+
+	if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) {
+		if (atomic_inc_return(&port->v4l_reader_count) == 1) {
+			if (saa7164_encoder_initialize(port) < 0)
+				return mask | EPOLLERR;
+			saa7164_encoder_start_streaming(port);
+			msleep(200);
+		}
+	}
+
+	/* Pull the first buffer from the used list */
+	if (!list_empty(&port->list_buf_used.list))
+		mask |= EPOLLIN | EPOLLRDNORM;
+
+	return mask;
+}
+
+static const struct v4l2_ctrl_ops saa7164_ctrl_ops = {
+	.s_ctrl = saa7164_s_ctrl,
+};
+
+static const struct v4l2_file_operations mpeg_fops = {
+	.owner		= THIS_MODULE,
+	.open		= fops_open,
+	.release	= fops_release,
+	.read		= fops_read,
+	.poll		= fops_poll,
+	.unlocked_ioctl	= video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops mpeg_ioctl_ops = {
+	.vidioc_s_std		 = vidioc_s_std,
+	.vidioc_g_std		 = vidioc_g_std,
+	.vidioc_enum_input	 = saa7164_enum_input,
+	.vidioc_g_input		 = vidioc_g_input,
+	.vidioc_s_input		 = vidioc_s_input,
+	.vidioc_g_tuner		 = saa7164_g_tuner,
+	.vidioc_s_tuner		 = saa7164_s_tuner,
+	.vidioc_g_frequency	 = vidioc_g_frequency,
+	.vidioc_s_frequency	 = vidioc_s_frequency,
+	.vidioc_querycap	 = vidioc_querycap,
+	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap	 = vidioc_fmt_vid_cap,
+	.vidioc_try_fmt_vid_cap	 = vidioc_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap	 = vidioc_fmt_vid_cap,
+	.vidioc_log_status	 = v4l2_ctrl_log_status,
+	.vidioc_subscribe_event  = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static struct video_device saa7164_mpeg_template = {
+	.name          = "saa7164",
+	.fops          = &mpeg_fops,
+	.ioctl_ops     = &mpeg_ioctl_ops,
+	.minor         = -1,
+	.tvnorms       = SAA7164_NORMS,
+	.device_caps   = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
+			 V4L2_CAP_TUNER,
+};
+
+static struct video_device *saa7164_encoder_alloc(
+	struct saa7164_port *port,
+	struct pci_dev *pci,
+	struct video_device *template,
+	char *type)
+{
+	struct video_device *vfd;
+	struct saa7164_dev *dev = port->dev;
+
+	dprintk(DBGLVL_ENC, "%s()\n", __func__);
+
+	vfd = video_device_alloc();
+	if (NULL == vfd)
+		return NULL;
+
+	*vfd = *template;
+	snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)", dev->name,
+		type, saa7164_boards[dev->board].name);
+
+	vfd->v4l2_dev  = &dev->v4l2_dev;
+	vfd->release = video_device_release;
+	return vfd;
+}
+
+int saa7164_encoder_register(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	struct v4l2_ctrl_handler *hdl = &port->ctrl_handler;
+	int result = -ENODEV;
+
+	dprintk(DBGLVL_ENC, "%s()\n", __func__);
+
+	BUG_ON(port->type != SAA7164_MPEG_ENCODER);
+
+	/* Sanity check that the PCI configuration space is active */
+	if (port->hwcfg.BARLocation == 0) {
+		printk(KERN_ERR "%s() failed (errno = %d), NO PCI configuration\n",
+			__func__, result);
+		result = -ENOMEM;
+		goto fail_pci;
+	}
+
+	/* Establish encoder defaults here */
+	/* Set default TV standard */
+	port->encodernorm = saa7164_tvnorms[0];
+	port->width = 720;
+	port->mux_input = 1; /* Composite */
+	port->video_format = EU_VIDEO_FORMAT_MPEG_2;
+	port->audio_format = 0;
+	port->video_resolution = 0;
+	port->freq = SAA7164_TV_MIN_FREQ;
+
+	v4l2_ctrl_handler_init(hdl, 14);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_BRIGHTNESS, 0, 255, 1, 127);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_CONTRAST, 0, 255, 1, 66);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_SATURATION, 0, 255, 1, 62);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_HUE, 0, 255, 1, 128);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_SHARPNESS, 0x0, 0x0f, 1, 8);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_MPEG_AUDIO_MUTE, 0x0, 0x01, 1, 0);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_AUDIO_VOLUME, -83, 24, 1, 20);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_BITRATE,
+			  ENCODER_MIN_BITRATE, ENCODER_MAX_BITRATE,
+			  100000, ENCODER_DEF_BITRATE);
+	v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
+			       V4L2_CID_MPEG_STREAM_TYPE,
+			       V4L2_MPEG_STREAM_TYPE_MPEG2_TS, 0,
+			       V4L2_MPEG_STREAM_TYPE_MPEG2_PS);
+	v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
+			       V4L2_CID_MPEG_VIDEO_ASPECT,
+			       V4L2_MPEG_VIDEO_ASPECT_221x100, 0,
+			       V4L2_MPEG_VIDEO_ASPECT_4x3);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_GOP_SIZE, 1, 255, 1, 15);
+	v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
+			       V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
+			       V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
+			       V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_B_FRAMES, 1, 3, 1, 1);
+	v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
+			  ENCODER_MIN_BITRATE, ENCODER_MAX_BITRATE,
+			  100000, ENCODER_DEF_BITRATE);
+	if (hdl->error) {
+		result = hdl->error;
+		goto fail_hdl;
+	}
+
+	port->std = V4L2_STD_NTSC_M;
+
+	if (port->encodernorm.id & V4L2_STD_525_60)
+		port->height = 480;
+	else
+		port->height = 576;
+
+	/* Allocate and register the video device node */
+	port->v4l_device = saa7164_encoder_alloc(port,
+		dev->pci, &saa7164_mpeg_template, "mpeg");
+
+	if (!port->v4l_device) {
+		printk(KERN_INFO "%s: can't allocate mpeg device\n",
+			dev->name);
+		result = -ENOMEM;
+		goto fail_hdl;
+	}
+
+	port->v4l_device->ctrl_handler = hdl;
+	v4l2_ctrl_handler_setup(hdl);
+	video_set_drvdata(port->v4l_device, port);
+	result = video_register_device(port->v4l_device,
+		VFL_TYPE_VIDEO, -1);
+	if (result < 0) {
+		printk(KERN_INFO "%s: can't register mpeg device\n",
+			dev->name);
+		goto fail_reg;
+	}
+
+	printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
+		dev->name, port->v4l_device->num);
+
+	/* Configure the hardware defaults */
+	saa7164_api_set_videomux(port);
+	saa7164_api_set_usercontrol(port, PU_BRIGHTNESS_CONTROL);
+	saa7164_api_set_usercontrol(port, PU_CONTRAST_CONTROL);
+	saa7164_api_set_usercontrol(port, PU_HUE_CONTROL);
+	saa7164_api_set_usercontrol(port, PU_SATURATION_CONTROL);
+	saa7164_api_set_usercontrol(port, PU_SHARPNESS_CONTROL);
+	saa7164_api_audio_mute(port, 0);
+	saa7164_api_set_audio_volume(port, 20);
+	saa7164_api_set_aspect_ratio(port);
+
+	/* Disable audio standard detection, it's buggy */
+	saa7164_api_set_audio_detection(port, 0);
+
+	saa7164_api_set_encoder(port);
+	saa7164_api_get_encoder(port);
+	return 0;
+
+fail_reg:
+	video_device_release(port->v4l_device);
+	port->v4l_device = NULL;
+fail_hdl:
+	v4l2_ctrl_handler_free(hdl);
+fail_pci:
+	return result;
+}
+
+void saa7164_encoder_unregister(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+
+	dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
+
+	BUG_ON(port->type != SAA7164_MPEG_ENCODER);
+
+	if (port->v4l_device) {
+		if (port->v4l_device->minor != -1)
+			video_unregister_device(port->v4l_device);
+		else
+			video_device_release(port->v4l_device);
+
+		port->v4l_device = NULL;
+	}
+	v4l2_ctrl_handler_free(&port->ctrl_handler);
+
+	dprintk(DBGLVL_ENC, "%s(port=%d) done\n", __func__, port->nr);
+}
+