Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 537 insertions, 0 deletions

diff --git a/drivers/media/pci/ivtv/ivtv-vbi.c b/drivers/media/pci/ivtv/ivtv-vbi.c
new file mode 100644
index 0000000000..80478b026d
--- /dev/null
+++ b/drivers/media/pci/ivtv/ivtv-vbi.c
@@ -0,0 +1,537 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+    Vertical Blank Interval support functions
+    Copyright (C) 2004-2007  Hans Verkuil <hverkuil@xs4all.nl>
+
+ */
+
+#include "ivtv-driver.h"
+#include "ivtv-i2c.h"
+#include "ivtv-ioctl.h"
+#include "ivtv-queue.h"
+#include "ivtv-cards.h"
+#include "ivtv-vbi.h"
+
+static void ivtv_set_vps(struct ivtv *itv, int enabled)
+{
+	struct v4l2_sliced_vbi_data data;
+
+	if (!(itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT))
+		return;
+	data.id = V4L2_SLICED_VPS;
+	data.field = 0;
+	data.line = enabled ? 16 : 0;
+	data.data[2] = itv->vbi.vps_payload.data[0];
+	data.data[8] = itv->vbi.vps_payload.data[1];
+	data.data[9] = itv->vbi.vps_payload.data[2];
+	data.data[10] = itv->vbi.vps_payload.data[3];
+	data.data[11] = itv->vbi.vps_payload.data[4];
+	ivtv_call_hw(itv, IVTV_HW_SAA7127, vbi, s_vbi_data, &data);
+}
+
+static void ivtv_set_cc(struct ivtv *itv, int mode, const struct vbi_cc *cc)
+{
+	struct v4l2_sliced_vbi_data data;
+
+	if (!(itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT))
+		return;
+	data.id = V4L2_SLICED_CAPTION_525;
+	data.field = 0;
+	data.line = (mode & 1) ? 21 : 0;
+	data.data[0] = cc->odd[0];
+	data.data[1] = cc->odd[1];
+	ivtv_call_hw(itv, IVTV_HW_SAA7127, vbi, s_vbi_data, &data);
+	data.field = 1;
+	data.line = (mode & 2) ? 21 : 0;
+	data.data[0] = cc->even[0];
+	data.data[1] = cc->even[1];
+	ivtv_call_hw(itv, IVTV_HW_SAA7127, vbi, s_vbi_data, &data);
+}
+
+static void ivtv_set_wss(struct ivtv *itv, int enabled, int mode)
+{
+	struct v4l2_sliced_vbi_data data;
+
+	if (!(itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT))
+		return;
+	/* When using a 50 Hz system, always turn on the
+	   wide screen signal with 4x3 ratio as the default.
+	   Turning this signal on and off can confuse certain
+	   TVs. As far as I can tell there is no reason not to
+	   transmit this signal. */
+	if ((itv->std_out & V4L2_STD_625_50) && !enabled) {
+		enabled = 1;
+		mode = 0x08;  /* 4x3 full format */
+	}
+	data.id = V4L2_SLICED_WSS_625;
+	data.field = 0;
+	data.line = enabled ? 23 : 0;
+	data.data[0] = mode & 0xff;
+	data.data[1] = (mode >> 8) & 0xff;
+	ivtv_call_hw(itv, IVTV_HW_SAA7127, vbi, s_vbi_data, &data);
+}
+
+static int odd_parity(u8 c)
+{
+	c ^= (c >> 4);
+	c ^= (c >> 2);
+	c ^= (c >> 1);
+
+	return c & 1;
+}
+
+static void ivtv_write_vbi_line(struct ivtv *itv,
+				const struct v4l2_sliced_vbi_data *d,
+				struct vbi_cc *cc, int *found_cc)
+{
+	struct vbi_info *vi = &itv->vbi;
+
+	if (d->id == V4L2_SLICED_CAPTION_525 && d->line == 21) {
+		if (d->field) {
+			cc->even[0] = d->data[0];
+			cc->even[1] = d->data[1];
+		} else {
+			cc->odd[0] = d->data[0];
+			cc->odd[1] = d->data[1];
+		}
+		*found_cc = 1;
+	} else if (d->id == V4L2_SLICED_VPS && d->line == 16 && d->field == 0) {
+		struct vbi_vps vps;
+
+		vps.data[0] = d->data[2];
+		vps.data[1] = d->data[8];
+		vps.data[2] = d->data[9];
+		vps.data[3] = d->data[10];
+		vps.data[4] = d->data[11];
+		if (memcmp(&vps, &vi->vps_payload, sizeof(vps))) {
+			vi->vps_payload = vps;
+			set_bit(IVTV_F_I_UPDATE_VPS, &itv->i_flags);
+		}
+	} else if (d->id == V4L2_SLICED_WSS_625 &&
+		   d->line == 23 && d->field == 0) {
+		int wss = d->data[0] | d->data[1] << 8;
+
+		if (vi->wss_payload != wss) {
+			vi->wss_payload = wss;
+			set_bit(IVTV_F_I_UPDATE_WSS, &itv->i_flags);
+		}
+	}
+}
+
+static void ivtv_write_vbi_cc_lines(struct ivtv *itv, const struct vbi_cc *cc)
+{
+	struct vbi_info *vi = &itv->vbi;
+
+	if (vi->cc_payload_idx < ARRAY_SIZE(vi->cc_payload)) {
+		memcpy(&vi->cc_payload[vi->cc_payload_idx], cc,
+		       sizeof(struct vbi_cc));
+		vi->cc_payload_idx++;
+		set_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags);
+	}
+}
+
+static void ivtv_write_vbi(struct ivtv *itv,
+			   const struct v4l2_sliced_vbi_data *sliced,
+			   size_t cnt)
+{
+	struct vbi_cc cc = { .odd = { 0x80, 0x80 }, .even = { 0x80, 0x80 } };
+	int found_cc = 0;
+	size_t i;
+
+	for (i = 0; i < cnt; i++)
+		ivtv_write_vbi_line(itv, sliced + i, &cc, &found_cc);
+
+	if (found_cc)
+		ivtv_write_vbi_cc_lines(itv, &cc);
+}
+
+ssize_t
+ivtv_write_vbi_from_user(struct ivtv *itv,
+			 const struct v4l2_sliced_vbi_data __user *sliced,
+			 size_t cnt)
+{
+	struct vbi_cc cc = { .odd = { 0x80, 0x80 }, .even = { 0x80, 0x80 } };
+	int found_cc = 0;
+	size_t i;
+	struct v4l2_sliced_vbi_data d;
+	ssize_t ret = cnt * sizeof(struct v4l2_sliced_vbi_data);
+
+	for (i = 0; i < cnt; i++) {
+		if (copy_from_user(&d, sliced + i,
+				   sizeof(struct v4l2_sliced_vbi_data))) {
+			ret = -EFAULT;
+			break;
+		}
+		ivtv_write_vbi_line(itv, &d, &cc, &found_cc);
+	}
+
+	if (found_cc)
+		ivtv_write_vbi_cc_lines(itv, &cc);
+
+	return ret;
+}
+
+static void copy_vbi_data(struct ivtv *itv, int lines, u32 pts_stamp)
+{
+	int line = 0;
+	int i;
+	u32 linemask[2] = { 0, 0 };
+	unsigned short size;
+	static const u8 mpeg_hdr_data[] = {
+		0x00, 0x00, 0x01, 0xba, 0x44, 0x00, 0x0c, 0x66,
+		0x24, 0x01, 0x01, 0xd1, 0xd3, 0xfa, 0xff, 0xff,
+		0x00, 0x00, 0x01, 0xbd, 0x00, 0x1a, 0x84, 0x80,
+		0x07, 0x21, 0x00, 0x5d, 0x63, 0xa7, 0xff, 0xff
+	};
+	const int sd = sizeof(mpeg_hdr_data);	/* start of vbi data */
+	int idx = itv->vbi.frame % IVTV_VBI_FRAMES;
+	u8 *dst = &itv->vbi.sliced_mpeg_data[idx][0];
+
+	for (i = 0; i < lines; i++) {
+		int f, l;
+
+		if (itv->vbi.sliced_data[i].id == 0)
+			continue;
+
+		l = itv->vbi.sliced_data[i].line - 6;
+		f = itv->vbi.sliced_data[i].field;
+		if (f)
+			l += 18;
+		if (l < 32)
+			linemask[0] |= (1 << l);
+		else
+			linemask[1] |= (1 << (l - 32));
+		dst[sd + 12 + line * 43] =
+			ivtv_service2vbi(itv->vbi.sliced_data[i].id);
+		memcpy(dst + sd + 12 + line * 43 + 1, itv->vbi.sliced_data[i].data, 42);
+		line++;
+	}
+	memcpy(dst, mpeg_hdr_data, sizeof(mpeg_hdr_data));
+	if (line == 36) {
+		/* All lines are used, so there is no space for the linemask
+		   (the max size of the VBI data is 36 * 43 + 4 bytes).
+		   So in this case we use the magic number 'ITV0'. */
+		memcpy(dst + sd, "ITV0", 4);
+		memmove(dst + sd + 4, dst + sd + 12, line * 43);
+		size = 4 + ((43 * line + 3) & ~3);
+	} else {
+		memcpy(dst + sd, "itv0", 4);
+		cpu_to_le32s(&linemask[0]);
+		cpu_to_le32s(&linemask[1]);
+		memcpy(dst + sd + 4, &linemask[0], 8);
+		size = 12 + ((43 * line + 3) & ~3);
+	}
+	dst[4+16] = (size + 10) >> 8;
+	dst[5+16] = (size + 10) & 0xff;
+	dst[9+16] = 0x21 | ((pts_stamp >> 29) & 0x6);
+	dst[10+16] = (pts_stamp >> 22) & 0xff;
+	dst[11+16] = 1 | ((pts_stamp >> 14) & 0xff);
+	dst[12+16] = (pts_stamp >> 7) & 0xff;
+	dst[13+16] = 1 | ((pts_stamp & 0x7f) << 1);
+	itv->vbi.sliced_mpeg_size[idx] = sd + size;
+}
+
+static int ivtv_convert_ivtv_vbi(struct ivtv *itv, u8 *p)
+{
+	u32 linemask[2];
+	int i, l, id2;
+	int line = 0;
+
+	if (!memcmp(p, "itv0", 4)) {
+		memcpy(linemask, p + 4, 8);
+		p += 12;
+	} else if (!memcmp(p, "ITV0", 4)) {
+		linemask[0] = 0xffffffff;
+		linemask[1] = 0xf;
+		p += 4;
+	} else {
+		/* unknown VBI data, convert to empty VBI frame */
+		linemask[0] = linemask[1] = 0;
+	}
+	for (i = 0; i < 36; i++) {
+		int err = 0;
+
+		if (i < 32 && !(linemask[0] & (1 << i)))
+			continue;
+		if (i >= 32 && !(linemask[1] & (1 << (i - 32))))
+			continue;
+		id2 = *p & 0xf;
+		switch (id2) {
+		case IVTV_SLICED_TYPE_TELETEXT_B:
+			id2 = V4L2_SLICED_TELETEXT_B;
+			break;
+		case IVTV_SLICED_TYPE_CAPTION_525:
+			id2 = V4L2_SLICED_CAPTION_525;
+			err = !odd_parity(p[1]) || !odd_parity(p[2]);
+			break;
+		case IVTV_SLICED_TYPE_VPS:
+			id2 = V4L2_SLICED_VPS;
+			break;
+		case IVTV_SLICED_TYPE_WSS_625:
+			id2 = V4L2_SLICED_WSS_625;
+			break;
+		default:
+			id2 = 0;
+			break;
+		}
+		if (err == 0) {
+			l = (i < 18) ? i + 6 : i - 18 + 6;
+			itv->vbi.sliced_dec_data[line].line = l;
+			itv->vbi.sliced_dec_data[line].field = i >= 18;
+			itv->vbi.sliced_dec_data[line].id = id2;
+			memcpy(itv->vbi.sliced_dec_data[line].data, p + 1, 42);
+			line++;
+		}
+		p += 43;
+	}
+	while (line < 36) {
+		itv->vbi.sliced_dec_data[line].id = 0;
+		itv->vbi.sliced_dec_data[line].line = 0;
+		itv->vbi.sliced_dec_data[line].field = 0;
+		line++;
+	}
+	return line * sizeof(itv->vbi.sliced_dec_data[0]);
+}
+
+/* Compress raw VBI format, removes leading SAV codes and surplus space after the
+   field.
+   Returns new compressed size. */
+static u32 compress_raw_buf(struct ivtv *itv, u8 *buf, u32 size)
+{
+	u32 line_size = itv->vbi.raw_decoder_line_size;
+	u32 lines = itv->vbi.count;
+	u8 sav1 = itv->vbi.raw_decoder_sav_odd_field;
+	u8 sav2 = itv->vbi.raw_decoder_sav_even_field;
+	u8 *q = buf;
+	u8 *p;
+	int i;
+
+	for (i = 0; i < lines; i++) {
+		p = buf + i * line_size;
+
+		/* Look for SAV code */
+		if (p[0] != 0xff || p[1] || p[2] || (p[3] != sav1 && p[3] != sav2)) {
+			break;
+		}
+		memcpy(q, p + 4, line_size - 4);
+		q += line_size - 4;
+	}
+	return lines * (line_size - 4);
+}
+
+
+/* Compressed VBI format, all found sliced blocks put next to one another
+   Returns new compressed size */
+static u32 compress_sliced_buf(struct ivtv *itv, u32 line, u8 *buf, u32 size, u8 sav)
+{
+	u32 line_size = itv->vbi.sliced_decoder_line_size;
+	struct v4l2_decode_vbi_line vbi = {};
+	int i;
+	unsigned lines = 0;
+
+	/* find the first valid line */
+	for (i = 0; i < size; i++, buf++) {
+		if (buf[0] == 0xff && !buf[1] && !buf[2] && buf[3] == sav)
+			break;
+	}
+
+	size -= i;
+	if (size < line_size) {
+		return line;
+	}
+	for (i = 0; i < size / line_size; i++) {
+		u8 *p = buf + i * line_size;
+
+		/* Look for SAV code  */
+		if (p[0] != 0xff || p[1] || p[2] || p[3] != sav) {
+			continue;
+		}
+		vbi.p = p + 4;
+		v4l2_subdev_call(itv->sd_video, vbi, decode_vbi_line, &vbi);
+		if (vbi.type && !(lines & (1 << vbi.line))) {
+			lines |= 1 << vbi.line;
+			itv->vbi.sliced_data[line].id = vbi.type;
+			itv->vbi.sliced_data[line].field = vbi.is_second_field;
+			itv->vbi.sliced_data[line].line = vbi.line;
+			memcpy(itv->vbi.sliced_data[line].data, vbi.p, 42);
+			line++;
+		}
+	}
+	return line;
+}
+
+void ivtv_process_vbi_data(struct ivtv *itv, struct ivtv_buffer *buf,
+			   u64 pts_stamp, int streamtype)
+{
+	u8 *p = (u8 *) buf->buf;
+	u32 size = buf->bytesused;
+	int y;
+
+	/* Raw VBI data */
+	if (streamtype == IVTV_ENC_STREAM_TYPE_VBI && ivtv_raw_vbi(itv)) {
+		u8 type;
+
+		ivtv_buf_swap(buf);
+
+		type = p[3];
+
+		size = buf->bytesused = compress_raw_buf(itv, p, size);
+
+		/* second field of the frame? */
+		if (type == itv->vbi.raw_decoder_sav_even_field) {
+			/* Dirty hack needed for backwards
+			   compatibility of old VBI software. */
+			p += size - 4;
+			memcpy(p, &itv->vbi.frame, 4);
+			itv->vbi.frame++;
+		}
+		return;
+	}
+
+	/* Sliced VBI data with data insertion */
+	if (streamtype == IVTV_ENC_STREAM_TYPE_VBI) {
+		int lines;
+
+		ivtv_buf_swap(buf);
+
+		/* first field */
+		lines = compress_sliced_buf(itv, 0, p, size / 2,
+			itv->vbi.sliced_decoder_sav_odd_field);
+		/* second field */
+		/* experimentation shows that the second half does not always begin
+		   at the exact address. So start a bit earlier (hence 32). */
+		lines = compress_sliced_buf(itv, lines, p + size / 2 - 32, size / 2 + 32,
+			itv->vbi.sliced_decoder_sav_even_field);
+		/* always return at least one empty line */
+		if (lines == 0) {
+			itv->vbi.sliced_data[0].id = 0;
+			itv->vbi.sliced_data[0].line = 0;
+			itv->vbi.sliced_data[0].field = 0;
+			lines = 1;
+		}
+		buf->bytesused = size = lines * sizeof(itv->vbi.sliced_data[0]);
+		memcpy(p, &itv->vbi.sliced_data[0], size);
+
+		if (itv->vbi.insert_mpeg) {
+			copy_vbi_data(itv, lines, pts_stamp);
+		}
+		itv->vbi.frame++;
+		return;
+	}
+
+	/* Sliced VBI re-inserted from an MPEG stream */
+	if (streamtype == IVTV_DEC_STREAM_TYPE_VBI) {
+		/* If the size is not 4-byte aligned, then the starting address
+		   for the swapping is also shifted. After swapping the data the
+		   real start address of the VBI data is exactly 4 bytes after the
+		   original start. It's a bit fiddly but it works like a charm.
+		   Non-4-byte alignment happens when an lseek is done on the input
+		   mpeg file to a non-4-byte aligned position. So on arrival here
+		   the VBI data is also non-4-byte aligned. */
+		int offset = size & 3;
+		int cnt;
+
+		if (offset) {
+			p += 4 - offset;
+		}
+		/* Swap Buffer */
+		for (y = 0; y < size; y += 4) {
+		       swab32s((u32 *)(p + y));
+		}
+
+		cnt = ivtv_convert_ivtv_vbi(itv, p + offset);
+		memcpy(buf->buf, itv->vbi.sliced_dec_data, cnt);
+		buf->bytesused = cnt;
+
+		ivtv_write_vbi(itv, itv->vbi.sliced_dec_data,
+			       cnt / sizeof(itv->vbi.sliced_dec_data[0]));
+		return;
+	}
+}
+
+void ivtv_disable_cc(struct ivtv *itv)
+{
+	struct vbi_cc cc = { .odd = { 0x80, 0x80 }, .even = { 0x80, 0x80 } };
+
+	clear_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags);
+	ivtv_set_cc(itv, 0, &cc);
+	itv->vbi.cc_payload_idx = 0;
+}
+
+
+void ivtv_vbi_work_handler(struct ivtv *itv)
+{
+	struct vbi_info *vi = &itv->vbi;
+	struct v4l2_sliced_vbi_data data;
+	struct vbi_cc cc = { .odd = { 0x80, 0x80 }, .even = { 0x80, 0x80 } };
+
+	/* Lock */
+	if (itv->output_mode == OUT_PASSTHROUGH) {
+		if (itv->is_50hz) {
+			data.id = V4L2_SLICED_WSS_625;
+			data.field = 0;
+
+			if (v4l2_subdev_call(itv->sd_video, vbi, g_vbi_data, &data) == 0) {
+				ivtv_set_wss(itv, 1, data.data[0] & 0xf);
+				vi->wss_missing_cnt = 0;
+			} else if (vi->wss_missing_cnt == 4) {
+				ivtv_set_wss(itv, 1, 0x8);  /* 4x3 full format */
+			} else {
+				vi->wss_missing_cnt++;
+			}
+		}
+		else {
+			int mode = 0;
+
+			data.id = V4L2_SLICED_CAPTION_525;
+			data.field = 0;
+			if (v4l2_subdev_call(itv->sd_video, vbi, g_vbi_data, &data) == 0) {
+				mode |= 1;
+				cc.odd[0] = data.data[0];
+				cc.odd[1] = data.data[1];
+			}
+			data.field = 1;
+			if (v4l2_subdev_call(itv->sd_video, vbi, g_vbi_data, &data) == 0) {
+				mode |= 2;
+				cc.even[0] = data.data[0];
+				cc.even[1] = data.data[1];
+			}
+			if (mode) {
+				vi->cc_missing_cnt = 0;
+				ivtv_set_cc(itv, mode, &cc);
+			} else if (vi->cc_missing_cnt == 4) {
+				ivtv_set_cc(itv, 0, &cc);
+			} else {
+				vi->cc_missing_cnt++;
+			}
+		}
+		return;
+	}
+
+	if (test_and_clear_bit(IVTV_F_I_UPDATE_WSS, &itv->i_flags)) {
+		ivtv_set_wss(itv, 1, vi->wss_payload & 0xf);
+	}
+
+	if (test_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags)) {
+		if (vi->cc_payload_idx == 0) {
+			clear_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags);
+			ivtv_set_cc(itv, 3, &cc);
+		}
+		while (vi->cc_payload_idx) {
+			cc = vi->cc_payload[0];
+
+			memmove(vi->cc_payload, vi->cc_payload + 1,
+					sizeof(vi->cc_payload) - sizeof(vi->cc_payload[0]));
+			vi->cc_payload_idx--;
+			if (vi->cc_payload_idx && cc.odd[0] == 0x80 && cc.odd[1] == 0x80)
+				continue;
+
+			ivtv_set_cc(itv, 3, &cc);
+			break;
+		}
+	}
+
+	if (test_and_clear_bit(IVTV_F_I_UPDATE_VPS, &itv->i_flags)) {
+		ivtv_set_vps(itv, 1);
+	}
+}