[media] pci: Add tw5864 driver

Support for boards based on Techwell TW5864 chip which provides
multichannel video & audio grabbing and encoding (H.264, MJPEG,
ADPCM G.726).

This submission implements only H.264 encoding of all channels at D1
resolution.

Thanks to Mark Thompson <sw@jkqxz.net> for help, and for contribution of
H.264 startcode emulation prevention code.

Signed-off-by: Andrey Utkin <andrey.utkin@corp.bluecherry.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 1514 insertions, 0 deletions

diff --git a/drivers/media/pci/tw5864/tw5864-video.c b/drivers/media/pci/tw5864/tw5864-video.c
new file mode 100644
index 000000000000..3461ba9162e7
--- /dev/null
+++ b/drivers/media/pci/tw5864/tw5864-video.c
@@ -0,0 +1,1514 @@
+/*
+ *  TW5864 driver - video encoding functions
+ *
+ *  Copyright (C) 2016 Bluecherry, LLC <maintainers@bluecherrydvr.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "tw5864.h"
+#include "tw5864-reg.h"
+
+#define QUANTIZATION_TABLE_LEN 96
+#define VLC_LOOKUP_TABLE_LEN 1024
+
+static const u16 forward_quantization_table[QUANTIZATION_TABLE_LEN] = {
+	0x3333, 0x1f82, 0x3333, 0x1f82, 0x1f82, 0x147b, 0x1f82, 0x147b,
+	0x3333, 0x1f82, 0x3333, 0x1f82, 0x1f82, 0x147b, 0x1f82, 0x147b,
+	0x2e8c, 0x1d42, 0x2e8c, 0x1d42, 0x1d42, 0x1234, 0x1d42, 0x1234,
+	0x2e8c, 0x1d42, 0x2e8c, 0x1d42, 0x1d42, 0x1234, 0x1d42, 0x1234,
+	0x2762, 0x199a, 0x2762, 0x199a, 0x199a, 0x1062, 0x199a, 0x1062,
+	0x2762, 0x199a, 0x2762, 0x199a, 0x199a, 0x1062, 0x199a, 0x1062,
+	0x2492, 0x16c1, 0x2492, 0x16c1, 0x16c1, 0x0e3f, 0x16c1, 0x0e3f,
+	0x2492, 0x16c1, 0x2492, 0x16c1, 0x16c1, 0x0e3f, 0x16c1, 0x0e3f,
+	0x2000, 0x147b, 0x2000, 0x147b, 0x147b, 0x0d1b, 0x147b, 0x0d1b,
+	0x2000, 0x147b, 0x2000, 0x147b, 0x147b, 0x0d1b, 0x147b, 0x0d1b,
+	0x1c72, 0x11cf, 0x1c72, 0x11cf, 0x11cf, 0x0b4d, 0x11cf, 0x0b4d,
+	0x1c72, 0x11cf, 0x1c72, 0x11cf, 0x11cf, 0x0b4d, 0x11cf, 0x0b4d
+};
+
+static const u16 inverse_quantization_table[QUANTIZATION_TABLE_LEN] = {
+	0x800a, 0x800d, 0x800a, 0x800d, 0x800d, 0x8010, 0x800d, 0x8010,
+	0x800a, 0x800d, 0x800a, 0x800d, 0x800d, 0x8010, 0x800d, 0x8010,
+	0x800b, 0x800e, 0x800b, 0x800e, 0x800e, 0x8012, 0x800e, 0x8012,
+	0x800b, 0x800e, 0x800b, 0x800e, 0x800e, 0x8012, 0x800e, 0x8012,
+	0x800d, 0x8010, 0x800d, 0x8010, 0x8010, 0x8014, 0x8010, 0x8014,
+	0x800d, 0x8010, 0x800d, 0x8010, 0x8010, 0x8014, 0x8010, 0x8014,
+	0x800e, 0x8012, 0x800e, 0x8012, 0x8012, 0x8017, 0x8012, 0x8017,
+	0x800e, 0x8012, 0x800e, 0x8012, 0x8012, 0x8017, 0x8012, 0x8017,
+	0x8010, 0x8014, 0x8010, 0x8014, 0x8014, 0x8019, 0x8014, 0x8019,
+	0x8010, 0x8014, 0x8010, 0x8014, 0x8014, 0x8019, 0x8014, 0x8019,
+	0x8012, 0x8017, 0x8012, 0x8017, 0x8017, 0x801d, 0x8017, 0x801d,
+	0x8012, 0x8017, 0x8012, 0x8017, 0x8017, 0x801d, 0x8017, 0x801d
+};
+
+static const u16 encoder_vlc_lookup_table[VLC_LOOKUP_TABLE_LEN] = {
+	0x011, 0x000, 0x000, 0x000, 0x065, 0x021, 0x000, 0x000, 0x087, 0x064,
+	0x031, 0x000, 0x097, 0x086, 0x075, 0x053, 0x0a7, 0x096, 0x085, 0x063,
+	0x0b7, 0x0a6, 0x095, 0x074, 0x0df, 0x0b6, 0x0a5, 0x084, 0x0db, 0x0de,
+	0x0b5, 0x094, 0x0d8, 0x0da, 0x0dd, 0x0a4, 0x0ef, 0x0ee, 0x0d9, 0x0b4,
+	0x0eb, 0x0ea, 0x0ed, 0x0dc, 0x0ff, 0x0fe, 0x0e9, 0x0ec, 0x0fb, 0x0fa,
+	0x0fd, 0x0e8, 0x10f, 0x0f1, 0x0f9, 0x0fc, 0x10b, 0x10e, 0x10d, 0x0f8,
+	0x107, 0x10a, 0x109, 0x10c, 0x104, 0x106, 0x105, 0x108, 0x023, 0x000,
+	0x000, 0x000, 0x06b, 0x022, 0x000, 0x000, 0x067, 0x057, 0x033, 0x000,
+	0x077, 0x06a, 0x069, 0x045, 0x087, 0x066, 0x065, 0x044, 0x084, 0x076,
+	0x075, 0x056, 0x097, 0x086, 0x085, 0x068, 0x0bf, 0x096, 0x095, 0x064,
+	0x0bb, 0x0be, 0x0bd, 0x074, 0x0cf, 0x0ba, 0x0b9, 0x094, 0x0cb, 0x0ce,
+	0x0cd, 0x0bc, 0x0c8, 0x0ca, 0x0c9, 0x0b8, 0x0df, 0x0de, 0x0dd, 0x0cc,
+	0x0db, 0x0da, 0x0d9, 0x0dc, 0x0d7, 0x0eb, 0x0d6, 0x0d8, 0x0e9, 0x0e8,
+	0x0ea, 0x0d1, 0x0e7, 0x0e6, 0x0e5, 0x0e4, 0x04f, 0x000, 0x000, 0x000,
+	0x06f, 0x04e, 0x000, 0x000, 0x06b, 0x05f, 0x04d, 0x000, 0x068, 0x05c,
+	0x05e, 0x04c, 0x07f, 0x05a, 0x05b, 0x04b, 0x07b, 0x058, 0x059, 0x04a,
+	0x079, 0x06e, 0x06d, 0x049, 0x078, 0x06a, 0x069, 0x048, 0x08f, 0x07e,
+	0x07d, 0x05d, 0x08b, 0x08e, 0x07a, 0x06c, 0x09f, 0x08a, 0x08d, 0x07c,
+	0x09b, 0x09e, 0x089, 0x08c, 0x098, 0x09a, 0x09d, 0x088, 0x0ad, 0x097,
+	0x099, 0x09c, 0x0a9, 0x0ac, 0x0ab, 0x0aa, 0x0a5, 0x0a8, 0x0a7, 0x0a6,
+	0x0a1, 0x0a4, 0x0a3, 0x0a2, 0x021, 0x000, 0x000, 0x000, 0x067, 0x011,
+	0x000, 0x000, 0x064, 0x066, 0x031, 0x000, 0x063, 0x073, 0x072, 0x065,
+	0x062, 0x083, 0x082, 0x070, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x011, 0x010,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x011, 0x021, 0x020, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x023, 0x022, 0x021, 0x020, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x023, 0x022, 0x021, 0x031,
+	0x030, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x023, 0x022, 0x033, 0x032, 0x031, 0x030, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x023, 0x030,
+	0x031, 0x033, 0x032, 0x035, 0x034, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x037, 0x036, 0x035, 0x034, 0x033, 0x032,
+	0x031, 0x041, 0x051, 0x061, 0x071, 0x081, 0x091, 0x0a1, 0x0b1, 0x000,
+	0x002, 0x000, 0x0e4, 0x011, 0x0f4, 0x002, 0x024, 0x003, 0x005, 0x012,
+	0x034, 0x013, 0x065, 0x024, 0x013, 0x063, 0x015, 0x022, 0x075, 0x034,
+	0x044, 0x023, 0x023, 0x073, 0x054, 0x033, 0x033, 0x004, 0x043, 0x014,
+	0x011, 0x043, 0x014, 0x001, 0x025, 0x015, 0x035, 0x025, 0x064, 0x055,
+	0x045, 0x035, 0x074, 0x065, 0x085, 0x0d5, 0x012, 0x095, 0x055, 0x045,
+	0x095, 0x0e5, 0x084, 0x075, 0x022, 0x0a5, 0x094, 0x085, 0x032, 0x0b5,
+	0x003, 0x0c5, 0x001, 0x044, 0x0a5, 0x032, 0x0b5, 0x094, 0x0c5, 0x0a4,
+	0x0a4, 0x054, 0x0d5, 0x0b4, 0x0b4, 0x064, 0x0f5, 0x0f5, 0x053, 0x0d4,
+	0x0e5, 0x0c4, 0x105, 0x105, 0x0c4, 0x074, 0x063, 0x0e4, 0x0d4, 0x084,
+	0x073, 0x0f4, 0x004, 0x005, 0x000, 0x053, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x011, 0x021, 0x031, 0x030, 0x011, 0x021, 0x020, 0x000,
+	0x011, 0x010, 0x000, 0x000, 0x011, 0x033, 0x032, 0x043, 0x042, 0x053,
+	0x052, 0x063, 0x062, 0x073, 0x072, 0x083, 0x082, 0x093, 0x092, 0x091,
+	0x037, 0x036, 0x035, 0x034, 0x033, 0x045, 0x044, 0x043, 0x042, 0x053,
+	0x052, 0x063, 0x062, 0x061, 0x060, 0x000, 0x045, 0x037, 0x036, 0x035,
+	0x044, 0x043, 0x034, 0x033, 0x042, 0x053, 0x052, 0x061, 0x051, 0x060,
+	0x000, 0x000, 0x053, 0x037, 0x045, 0x044, 0x036, 0x035, 0x034, 0x043,
+	0x033, 0x042, 0x052, 0x051, 0x050, 0x000, 0x000, 0x000, 0x045, 0x044,
+	0x043, 0x037, 0x036, 0x035, 0x034, 0x033, 0x042, 0x051, 0x041, 0x050,
+	0x000, 0x000, 0x000, 0x000, 0x061, 0x051, 0x037, 0x036, 0x035, 0x034,
+	0x033, 0x032, 0x041, 0x031, 0x060, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x061, 0x051, 0x035, 0x034, 0x033, 0x023, 0x032, 0x041, 0x031, 0x060,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x061, 0x041, 0x051, 0x033,
+	0x023, 0x022, 0x032, 0x031, 0x060, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x061, 0x060, 0x041, 0x023, 0x022, 0x031, 0x021, 0x051,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x051, 0x050,
+	0x031, 0x023, 0x022, 0x021, 0x041, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x040, 0x041, 0x031, 0x032, 0x011, 0x033,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x040, 0x041, 0x021, 0x011, 0x031, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x030, 0x031, 0x011, 0x021,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x020, 0x021, 0x011, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x010, 0x011,
+	0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000,
+	0x000, 0x000, 0x000, 0x000
+};
+
+static const unsigned int lambda_lookup_table[] = {
+	0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
+	0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
+	0x0040, 0x0040, 0x0040, 0x0040, 0x0060, 0x0060, 0x0060, 0x0080,
+	0x0080, 0x0080, 0x00a0, 0x00c0, 0x00c0, 0x00e0, 0x0100, 0x0120,
+	0x0140, 0x0160, 0x01a0, 0x01c0, 0x0200, 0x0240, 0x0280, 0x02e0,
+	0x0320, 0x03a0, 0x0400, 0x0480, 0x0500, 0x05a0, 0x0660, 0x0720,
+	0x0800, 0x0900, 0x0a20, 0x0b60
+};
+
+static const unsigned int intra4x4_lambda3[] = {
+	1, 1, 1, 1, 1, 1, 1, 1,
+	1, 1, 1, 1, 1, 1, 1, 1,
+	2, 2, 2, 2, 3, 3, 3, 4,
+	4, 4, 5, 6, 6, 7, 8, 9,
+	10, 11, 13, 14, 16, 18, 20, 23,
+	25, 29, 32, 36, 40, 45, 51, 57,
+	64, 72, 81, 91
+};
+
+static v4l2_std_id tw5864_get_v4l2_std(enum tw5864_vid_std std);
+static enum tw5864_vid_std tw5864_from_v4l2_std(v4l2_std_id v4l2_std);
+
+static void tw5864_handle_frame_task(unsigned long data);
+static void tw5864_handle_frame(struct tw5864_h264_frame *frame);
+static void tw5864_frame_interval_set(struct tw5864_input *input);
+
+static int tw5864_queue_setup(struct vb2_queue *q, unsigned int *num_buffers,
+			      unsigned int *num_planes, unsigned int sizes[],
+			      struct device *alloc_ctxs[])
+{
+	if (*num_planes)
+		return sizes[0] < H264_VLC_BUF_SIZE ? -EINVAL : 0;
+
+	sizes[0] = H264_VLC_BUF_SIZE;
+	*num_planes = 1;
+
+	return 0;
+}
+
+static void tw5864_buf_queue(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct vb2_queue *vq = vb->vb2_queue;
+	struct tw5864_input *dev = vb2_get_drv_priv(vq);
+	struct tw5864_buf *buf = container_of(vbuf, struct tw5864_buf, vb);
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->slock, flags);
+	list_add_tail(&buf->list, &dev->active);
+	spin_unlock_irqrestore(&dev->slock, flags);
+}
+
+static int tw5864_input_std_get(struct tw5864_input *input,
+				enum tw5864_vid_std *std)
+{
+	struct tw5864_dev *dev = input->root;
+	u8 std_reg = tw_indir_readb(TW5864_INDIR_VIN_E(input->nr));
+
+	*std = (std_reg & 0x70) >> 4;
+
+	if (std_reg & 0x80) {
+		dev_dbg(&dev->pci->dev,
+			"Video format detection is in progress, please wait\n");
+		return -EAGAIN;
+	}
+
+	return 0;
+}
+
+static int tw5864_enable_input(struct tw5864_input *input)
+{
+	struct tw5864_dev *dev = input->root;
+	int nr = input->nr;
+	unsigned long flags;
+	int d1_width = 720;
+	int d1_height;
+	int frame_width_bus_value = 0;
+	int frame_height_bus_value = 0;
+	int reg_frame_bus = 0x1c;
+	int fmt_reg_value = 0;
+	int downscale_enabled = 0;
+
+	dev_dbg(&dev->pci->dev, "Enabling channel %d\n", nr);
+
+	input->frame_seqno = 0;
+	input->frame_gop_seqno = 0;
+	input->h264_idr_pic_id = 0;
+
+	input->reg_dsp_qp = input->qp;
+	input->reg_dsp_ref_mvp_lambda = lambda_lookup_table[input->qp];
+	input->reg_dsp_i4x4_weight = intra4x4_lambda3[input->qp];
+	input->reg_emu = TW5864_EMU_EN_LPF | TW5864_EMU_EN_BHOST
+		| TW5864_EMU_EN_SEN | TW5864_EMU_EN_ME | TW5864_EMU_EN_DDR;
+	input->reg_dsp = nr /* channel id */
+		| TW5864_DSP_CHROM_SW
+		| ((0xa << 8) & TW5864_DSP_MB_DELAY)
+		;
+
+	input->resolution = D1;
+
+	d1_height = (input->std == STD_NTSC) ? 480 : 576;
+
+	input->width = d1_width;
+	input->height = d1_height;
+
+	input->reg_interlacing = 0x4;
+
+	switch (input->resolution) {
+	case D1:
+		frame_width_bus_value = 0x2cf;
+		frame_height_bus_value = input->height - 1;
+		reg_frame_bus = 0x1c;
+		fmt_reg_value = 0;
+		downscale_enabled = 0;
+		input->reg_dsp_codec |= TW5864_CIF_MAP_MD | TW5864_HD1_MAP_MD;
+		input->reg_emu |= TW5864_DSP_FRAME_TYPE_D1;
+		input->reg_interlacing = TW5864_DI_EN | TW5864_DSP_INTER_ST;
+
+		tw_setl(TW5864_FULL_HALF_FLAG, 1 << nr);
+		break;
+	case HD1:
+		input->height /= 2;
+		input->width /= 2;
+		frame_width_bus_value = 0x2cf;
+		frame_height_bus_value = input->height * 2 - 1;
+		reg_frame_bus = 0x1c;
+		fmt_reg_value = 0;
+		downscale_enabled = 0;
+		input->reg_dsp_codec |= TW5864_HD1_MAP_MD;
+		input->reg_emu |= TW5864_DSP_FRAME_TYPE_D1;
+
+		tw_clearl(TW5864_FULL_HALF_FLAG, 1 << nr);
+
+		break;
+	case CIF:
+		input->height /= 4;
+		input->width /= 2;
+		frame_width_bus_value = 0x15f;
+		frame_height_bus_value = input->height * 2 - 1;
+		reg_frame_bus = 0x07;
+		fmt_reg_value = 1;
+		downscale_enabled = 1;
+		input->reg_dsp_codec |= TW5864_CIF_MAP_MD;
+
+		tw_clearl(TW5864_FULL_HALF_FLAG, 1 << nr);
+		break;
+	case QCIF:
+		input->height /= 4;
+		input->width /= 4;
+		frame_width_bus_value = 0x15f;
+		frame_height_bus_value = input->height * 2 - 1;
+		reg_frame_bus = 0x07;
+		fmt_reg_value = 1;
+		downscale_enabled = 1;
+		input->reg_dsp_codec |= TW5864_CIF_MAP_MD;
+
+		tw_clearl(TW5864_FULL_HALF_FLAG, 1 << nr);
+		break;
+	}
+
+	/* analog input width / 4 */
+	tw_indir_writeb(TW5864_INDIR_IN_PIC_WIDTH(nr), d1_width / 4);
+	tw_indir_writeb(TW5864_INDIR_IN_PIC_HEIGHT(nr), d1_height / 4);
+
+	/* output width / 4 */
+	tw_indir_writeb(TW5864_INDIR_OUT_PIC_WIDTH(nr), input->width / 4);
+	tw_indir_writeb(TW5864_INDIR_OUT_PIC_HEIGHT(nr), input->height / 4);
+
+	tw_writel(TW5864_DSP_PIC_MAX_MB,
+		  ((input->width / 16) << 8) | (input->height / 16));
+
+	tw_writel(TW5864_FRAME_WIDTH_BUS_A(nr),
+		  frame_width_bus_value);
+	tw_writel(TW5864_FRAME_WIDTH_BUS_B(nr),
+		  frame_width_bus_value);
+	tw_writel(TW5864_FRAME_HEIGHT_BUS_A(nr),
+		  frame_height_bus_value);
+	tw_writel(TW5864_FRAME_HEIGHT_BUS_B(nr),
+		  (frame_height_bus_value + 1) / 2 - 1);
+
+	tw5864_frame_interval_set(input);
+
+	if (downscale_enabled)
+		tw_setl(TW5864_H264EN_CH_DNS, 1 << nr);
+
+	tw_mask_shift_writel(TW5864_H264EN_CH_FMT_REG1, 0x3, 2 * nr,
+			     fmt_reg_value);
+
+	tw_mask_shift_writel((nr < 2
+			      ? TW5864_H264EN_RATE_MAX_LINE_REG1
+			      : TW5864_H264EN_RATE_MAX_LINE_REG2),
+			     0x1f, 5 * (nr % 2),
+			     input->std == STD_NTSC ? 29 : 24);
+
+	tw_mask_shift_writel((nr < 2) ? TW5864_FRAME_BUS1 :
+			     TW5864_FRAME_BUS2, 0xff, (nr % 2) * 8,
+			     reg_frame_bus);
+
+	spin_lock_irqsave(&dev->slock, flags);
+	input->enabled = 1;
+	spin_unlock_irqrestore(&dev->slock, flags);
+
+	return 0;
+}
+
+void tw5864_request_encoded_frame(struct tw5864_input *input)
+{
+	struct tw5864_dev *dev = input->root;
+	u32 enc_buf_id_new;
+
+	tw_setl(TW5864_DSP_CODEC, TW5864_CIF_MAP_MD | TW5864_HD1_MAP_MD);
+	tw_writel(TW5864_EMU, input->reg_emu);
+	tw_writel(TW5864_INTERLACING, input->reg_interlacing);
+	tw_writel(TW5864_DSP, input->reg_dsp);
+
+	tw_writel(TW5864_DSP_QP, input->reg_dsp_qp);
+	tw_writel(TW5864_DSP_REF_MVP_LAMBDA, input->reg_dsp_ref_mvp_lambda);
+	tw_writel(TW5864_DSP_I4x4_WEIGHT, input->reg_dsp_i4x4_weight);
+	tw_mask_shift_writel(TW5864_DSP_INTRA_MODE, TW5864_DSP_INTRA_MODE_MASK,
+			     TW5864_DSP_INTRA_MODE_SHIFT,
+			     TW5864_DSP_INTRA_MODE_16x16);
+
+	if (input->frame_gop_seqno == 0) {
+		/* Produce I-frame */
+		tw_writel(TW5864_MOTION_SEARCH_ETC, TW5864_INTRA_EN);
+		input->h264_idr_pic_id++;
+		input->h264_idr_pic_id &= TW5864_DSP_REF_FRM;
+	} else {
+		/* Produce P-frame */
+		tw_writel(TW5864_MOTION_SEARCH_ETC, TW5864_INTRA_EN |
+			  TW5864_ME_EN | BIT(5) /* SRCH_OPT default */);
+	}
+	tw5864_prepare_frame_headers(input);
+	tw_writel(TW5864_VLC,
+		  TW5864_VLC_PCI_SEL |
+		  ((input->tail_nb_bits + 24) << TW5864_VLC_BIT_ALIGN_SHIFT) |
+		  input->reg_dsp_qp);
+
+	enc_buf_id_new = tw_mask_shift_readl(TW5864_ENC_BUF_PTR_REC1, 0x3,
+					     2 * input->nr);
+	tw_writel(TW5864_DSP_ENC_ORG_PTR_REG,
+		  enc_buf_id_new << TW5864_DSP_ENC_ORG_PTR_SHIFT);
+	tw_writel(TW5864_DSP_ENC_REC,
+		  enc_buf_id_new << 12 | ((enc_buf_id_new + 3) & 3));
+
+	tw_writel(TW5864_SLICE, TW5864_START_NSLICE);
+	tw_writel(TW5864_SLICE, 0);
+}
+
+static int tw5864_disable_input(struct tw5864_input *input)
+{
+	struct tw5864_dev *dev = input->root;
+	unsigned long flags;
+
+	dev_dbg(&dev->pci->dev, "Disabling channel %d\n", input->nr);
+
+	spin_lock_irqsave(&dev->slock, flags);
+	input->enabled = 0;
+	spin_unlock_irqrestore(&dev->slock, flags);
+	return 0;
+}
+
+static int tw5864_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+	struct tw5864_input *input = vb2_get_drv_priv(q);
+	int ret;
+
+	ret = tw5864_enable_input(input);
+	if (!ret)
+		return 0;
+
+	while (!list_empty(&input->active)) {
+		struct tw5864_buf *buf = list_entry(input->active.next,
+						    struct tw5864_buf, list);
+
+		list_del(&buf->list);
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+	}
+	return ret;
+}
+
+static void tw5864_stop_streaming(struct vb2_queue *q)
+{
+	unsigned long flags;
+	struct tw5864_input *input = vb2_get_drv_priv(q);
+
+	tw5864_disable_input(input);
+
+	spin_lock_irqsave(&input->slock, flags);
+	if (input->vb) {
+		vb2_buffer_done(&input->vb->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+		input->vb = NULL;
+	}
+	while (!list_empty(&input->active)) {
+		struct tw5864_buf *buf = list_entry(input->active.next,
+						    struct tw5864_buf, list);
+
+		list_del(&buf->list);
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+	}
+	spin_unlock_irqrestore(&input->slock, flags);
+}
+
+static struct vb2_ops tw5864_video_qops = {
+	.queue_setup = tw5864_queue_setup,
+	.buf_queue = tw5864_buf_queue,
+	.start_streaming = tw5864_start_streaming,
+	.stop_streaming = tw5864_stop_streaming,
+	.wait_prepare = vb2_ops_wait_prepare,
+	.wait_finish = vb2_ops_wait_finish,
+};
+
+static int tw5864_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct tw5864_input *input =
+		container_of(ctrl->handler, struct tw5864_input, hdl);
+	struct tw5864_dev *dev = input->root;
+	unsigned long flags;
+
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		tw_indir_writeb(TW5864_INDIR_VIN_A_BRIGHT(input->nr),
+				(u8)ctrl->val);
+		break;
+	case V4L2_CID_HUE:
+		tw_indir_writeb(TW5864_INDIR_VIN_7_HUE(input->nr),
+				(u8)ctrl->val);
+		break;
+	case V4L2_CID_CONTRAST:
+		tw_indir_writeb(TW5864_INDIR_VIN_9_CNTRST(input->nr),
+				(u8)ctrl->val);
+		break;
+	case V4L2_CID_SATURATION:
+		tw_indir_writeb(TW5864_INDIR_VIN_B_SAT_U(input->nr),
+				(u8)ctrl->val);
+		tw_indir_writeb(TW5864_INDIR_VIN_C_SAT_V(input->nr),
+				(u8)ctrl->val);
+		break;
+	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
+		input->gop = ctrl->val;
+		return 0;
+	case V4L2_CID_MPEG_VIDEO_H264_MIN_QP:
+		spin_lock_irqsave(&input->slock, flags);
+		input->qp = ctrl->val;
+		input->reg_dsp_qp = input->qp;
+		input->reg_dsp_ref_mvp_lambda = lambda_lookup_table[input->qp];
+		input->reg_dsp_i4x4_weight = intra4x4_lambda3[input->qp];
+		spin_unlock_irqrestore(&input->slock, flags);
+		return 0;
+	case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
+		memset(input->md_threshold_grid_values, ctrl->val,
+		       sizeof(input->md_threshold_grid_values));
+		return 0;
+	case V4L2_CID_DETECT_MD_MODE:
+		return 0;
+	case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
+		/* input->md_threshold_grid_ctrl->p_new.p_u16 contains data */
+		memcpy(input->md_threshold_grid_values,
+		       input->md_threshold_grid_ctrl->p_new.p_u16,
+		       sizeof(input->md_threshold_grid_values));
+		return 0;
+	}
+	return 0;
+}
+
+static int tw5864_fmt_vid_cap(struct file *file, void *priv,
+			      struct v4l2_format *f)
+{
+	struct tw5864_input *input = video_drvdata(file);
+
+	f->fmt.pix.width = 720;
+	switch (input->std) {
+	default:
+		WARN_ON_ONCE(1);
+	case STD_NTSC:
+		f->fmt.pix.height = 480;
+		break;
+	case STD_PAL:
+	case STD_SECAM:
+		f->fmt.pix.height = 576;
+		break;
+	}
+	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
+	f->fmt.pix.pixelformat = V4L2_PIX_FMT_H264;
+	f->fmt.pix.sizeimage = H264_VLC_BUF_SIZE;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+	return 0;
+}
+
+static int tw5864_enum_input(struct file *file, void *priv,
+			     struct v4l2_input *i)
+{
+	struct tw5864_input *input = video_drvdata(file);
+	struct tw5864_dev *dev = input->root;
+
+	u8 indir_0x000 = tw_indir_readb(TW5864_INDIR_VIN_0(input->nr));
+	u8 indir_0x00d = tw_indir_readb(TW5864_INDIR_VIN_D(input->nr));
+	u8 v1 = indir_0x000;
+	u8 v2 = indir_0x00d;
+
+	if (i->index)
+		return -EINVAL;
+
+	i->type = V4L2_INPUT_TYPE_CAMERA;
+	snprintf(i->name, sizeof(i->name), "Encoder %d", input->nr);
+	i->std = TW5864_NORMS;
+	if (v1 & (1 << 7))
+		i->status |= V4L2_IN_ST_NO_SYNC;
+	if (!(v1 & (1 << 6)))
+		i->status |= V4L2_IN_ST_NO_H_LOCK;
+	if (v1 & (1 << 2))
+		i->status |= V4L2_IN_ST_NO_SIGNAL;
+	if (v1 & (1 << 1))
+		i->status |= V4L2_IN_ST_NO_COLOR;
+	if (v2 & (1 << 2))
+		i->status |= V4L2_IN_ST_MACROVISION;
+
+	return 0;
+}
+
+static int tw5864_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	*i = 0;
+	return 0;
+}
+
+static int tw5864_s_input(struct file *file, void *priv, unsigned int i)
+{
+	if (i)
+		return -EINVAL;
+	return 0;
+}
+
+static int tw5864_querycap(struct file *file, void *priv,
+			   struct v4l2_capability *cap)
+{
+	struct tw5864_input *input = video_drvdata(file);
+
+	strcpy(cap->driver, "tw5864");
+	snprintf(cap->card, sizeof(cap->card), "TW5864 Encoder %d",
+		 input->nr);
+	sprintf(cap->bus_info, "PCI:%s", pci_name(input->root->pci));
+	return 0;
+}
+
+static int tw5864_querystd(struct file *file, void *priv, v4l2_std_id *std)
+{
+	struct tw5864_input *input = video_drvdata(file);
+	enum tw5864_vid_std tw_std;
+	int ret;
+
+	ret = tw5864_input_std_get(input, &tw_std);
+	if (ret)
+		return ret;
+	*std = tw5864_get_v4l2_std(tw_std);
+
+	return 0;
+}
+
+static int tw5864_g_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+	struct tw5864_input *input = video_drvdata(file);
+
+	*std = input->v4l2_std;
+	return 0;
+}
+
+static int tw5864_s_std(struct file *file, void *priv, v4l2_std_id std)
+{
+	struct tw5864_input *input = video_drvdata(file);
+	struct tw5864_dev *dev = input->root;
+
+	input->v4l2_std = std;
+	input->std = tw5864_from_v4l2_std(std);
+	tw_indir_writeb(TW5864_INDIR_VIN_E(input->nr), input->std);
+	return 0;
+}
+
+static int tw5864_enum_fmt_vid_cap(struct file *file, void *priv,
+				   struct v4l2_fmtdesc *f)
+{
+	if (f->index)
+		return -EINVAL;
+
+	f->pixelformat = V4L2_PIX_FMT_H264;
+
+	return 0;
+}
+
+static int tw5864_subscribe_event(struct v4l2_fh *fh,
+				  const struct v4l2_event_subscription *sub)
+{
+	switch (sub->type) {
+	case V4L2_EVENT_CTRL:
+		return v4l2_ctrl_subscribe_event(fh, sub);
+	case V4L2_EVENT_MOTION_DET:
+		/*
+		 * Allow for up to 30 events (1 second for NTSC) to be stored.
+		 */
+		return v4l2_event_subscribe(fh, sub, 30, NULL);
+	}
+	return -EINVAL;
+}
+
+static void tw5864_frame_interval_set(struct tw5864_input *input)
+{
+	/*
+	 * This register value seems to follow such approach: In each second
+	 * interval, when processing Nth frame, it checks Nth bit of register
+	 * value and, if the bit is 1, it processes the frame, otherwise the
+	 * frame is discarded.
+	 * So unary representation would work, but more or less equal gaps
+	 * between the frames should be preserved.
+	 *
+	 * For 1 FPS - 0x00000001
+	 * 00000000 00000000 00000000 00000001
+	 *
+	 * For max FPS - set all 25/30 lower bits:
+	 * 00111111 11111111 11111111 11111111 (NTSC)
+	 * 00000001 11111111 11111111 11111111 (PAL)
+	 *
+	 * For half of max FPS - use such pattern:
+	 * 00010101 01010101 01010101 01010101 (NTSC)
+	 * 00000001 01010101 01010101 01010101 (PAL)
+	 *
+	 * Et cetera.
+	 *
+	 * The value supplied to hardware is capped by mask of 25/30 lower bits.
+	 */
+	struct tw5864_dev *dev = input->root;
+	u32 unary_framerate = 0;
+	int shift = 0;
+	int std_max_fps = input->std == STD_NTSC ? 30 : 25;
+
+	for (shift = 0; shift < std_max_fps; shift += input->frame_interval)
+		unary_framerate |= 0x00000001 << shift;
+
+	tw_writel(TW5864_H264EN_RATE_CNTL_LO_WORD(input->nr, 0),
+		  unary_framerate >> 16);
+	tw_writel(TW5864_H264EN_RATE_CNTL_HI_WORD(input->nr, 0),
+		  unary_framerate & 0xffff);
+}
+
+static int tw5864_frameinterval_get(struct tw5864_input *input,
+				    struct v4l2_fract *frameinterval)
+{
+	switch (input->std) {
+	case STD_NTSC:
+		frameinterval->numerator = 1001;
+		frameinterval->denominator = 30000;
+		break;
+	case STD_PAL:
+	case STD_SECAM:
+		frameinterval->numerator = 1;
+		frameinterval->denominator = 25;
+		break;
+	default:
+		WARN(1, "tw5864_frameinterval_get requested for unknown std %d\n",
+		     input->std);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int tw5864_enum_framesizes(struct file *file, void *priv,
+				  struct v4l2_frmsizeenum *fsize)
+{
+	struct tw5864_input *input = video_drvdata(file);
+
+	if (fsize->index > 0)
+		return -EINVAL;
+	if (fsize->pixel_format != V4L2_PIX_FMT_H264)
+		return -EINVAL;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	fsize->discrete.width = 720;
+	fsize->discrete.height = input->std == STD_NTSC ? 480 : 576;
+
+	return 0;
+}
+
+static int tw5864_enum_frameintervals(struct file *file, void *priv,
+				      struct v4l2_frmivalenum *fintv)
+{
+	struct tw5864_input *input = video_drvdata(file);
+	struct v4l2_fract frameinterval;
+	int std_max_fps = input->std == STD_NTSC ? 30 : 25;
+	struct v4l2_frmsizeenum fsize = { .index = fintv->index,
+		.pixel_format = fintv->pixel_format };
+	int ret;
+
+	ret = tw5864_enum_framesizes(file, priv, &fsize);
+	if (ret)
+		return ret;
+
+	if (fintv->width != fsize.discrete.width ||
+	    fintv->height != fsize.discrete.height)
+		return -EINVAL;
+
+	fintv->type = V4L2_FRMIVAL_TYPE_STEPWISE;
+
+	ret = tw5864_frameinterval_get(input, &frameinterval);
+	fintv->stepwise.step = frameinterval;
+	fintv->stepwise.min = frameinterval;
+	fintv->stepwise.max = frameinterval;
+	fintv->stepwise.max.numerator *= std_max_fps;
+
+	return ret;
+}
+
+static int tw5864_g_parm(struct file *file, void *priv,
+			 struct v4l2_streamparm *sp)
+{
+	struct tw5864_input *input = video_drvdata(file);
+	struct v4l2_captureparm *cp = &sp->parm.capture;
+	int ret;
+
+	cp->capability = V4L2_CAP_TIMEPERFRAME;
+
+	ret = tw5864_frameinterval_get(input, &cp->timeperframe);
+	cp->timeperframe.numerator *= input->frame_interval;
+	cp->capturemode = 0;
+	cp->readbuffers = 2;
+
+	return ret;
+}
+
+static int tw5864_s_parm(struct file *file, void *priv,
+			 struct v4l2_streamparm *sp)
+{
+	struct tw5864_input *input = video_drvdata(file);
+	struct v4l2_fract *t = &sp->parm.capture.timeperframe;
+	struct v4l2_fract time_base;
+	int ret;
+
+	ret = tw5864_frameinterval_get(input, &time_base);
+	if (ret)
+		return ret;
+
+	if (!t->numerator || !t->denominator) {
+		t->numerator = time_base.numerator * input->frame_interval;
+		t->denominator = time_base.denominator;
+	} else if (t->denominator != time_base.denominator) {
+		t->numerator = t->numerator * time_base.denominator /
+			t->denominator;
+		t->denominator = time_base.denominator;
+	}
+
+	input->frame_interval = t->numerator / time_base.numerator;
+	if (input->frame_interval < 1)
+		input->frame_interval = 1;
+	tw5864_frame_interval_set(input);
+	return tw5864_g_parm(file, priv, sp);
+}
+
+static const struct v4l2_ctrl_ops tw5864_ctrl_ops = {
+	.s_ctrl = tw5864_s_ctrl,
+};
+
+static const struct v4l2_file_operations video_fops = {
+	.owner = THIS_MODULE,
+	.open = v4l2_fh_open,
+	.release = vb2_fop_release,
+	.read = vb2_fop_read,
+	.poll = vb2_fop_poll,
+	.mmap = vb2_fop_mmap,
+	.unlocked_ioctl = video_ioctl2,
+};
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+
+#define INDIR_SPACE_MAP_SHIFT 0x100000
+
+static int tw5864_g_reg(struct file *file, void *fh,
+			struct v4l2_dbg_register *reg)
+{
+	struct tw5864_input *input = video_drvdata(file);
+	struct tw5864_dev *dev = input->root;
+
+	if (reg->reg < INDIR_SPACE_MAP_SHIFT) {
+		if (reg->reg > 0x87fff)
+			return -EINVAL;
+		reg->size = 4;
+		reg->val = tw_readl(reg->reg);
+	} else {
+		__u64 indir_addr = reg->reg - INDIR_SPACE_MAP_SHIFT;
+
+		if (indir_addr > 0xefe)
+			return -EINVAL;
+		reg->size = 1;
+		reg->val = tw_indir_readb(reg->reg);
+	}
+	return 0;
+}
+
+static int tw5864_s_reg(struct file *file, void *fh,
+			const struct v4l2_dbg_register *reg)
+{
+	struct tw5864_input *input = video_drvdata(file);
+	struct tw5864_dev *dev = input->root;
+
+	if (reg->reg < INDIR_SPACE_MAP_SHIFT) {
+		if (reg->reg > 0x87fff)
+			return -EINVAL;
+		tw_writel(reg->reg, reg->val);
+	} else {
+		__u64 indir_addr = reg->reg - INDIR_SPACE_MAP_SHIFT;
+
+		if (indir_addr > 0xefe)
+			return -EINVAL;
+		tw_indir_writeb(reg->reg, reg->val);
+	}
+	return 0;
+}
+#endif
+
+static const struct v4l2_ioctl_ops video_ioctl_ops = {
+	.vidioc_querycap = tw5864_querycap,
+	.vidioc_enum_fmt_vid_cap = tw5864_enum_fmt_vid_cap,
+	.vidioc_reqbufs = vb2_ioctl_reqbufs,
+	.vidioc_create_bufs = vb2_ioctl_create_bufs,
+	.vidioc_querybuf = vb2_ioctl_querybuf,
+	.vidioc_qbuf = vb2_ioctl_qbuf,
+	.vidioc_dqbuf = vb2_ioctl_dqbuf,
+	.vidioc_expbuf = vb2_ioctl_expbuf,
+	.vidioc_querystd = tw5864_querystd,
+	.vidioc_s_std = tw5864_s_std,
+	.vidioc_g_std = tw5864_g_std,
+	.vidioc_enum_input = tw5864_enum_input,
+	.vidioc_g_input = tw5864_g_input,
+	.vidioc_s_input = tw5864_s_input,
+	.vidioc_streamon = vb2_ioctl_streamon,
+	.vidioc_streamoff = vb2_ioctl_streamoff,
+	.vidioc_try_fmt_vid_cap = tw5864_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap = tw5864_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap = tw5864_fmt_vid_cap,
+	.vidioc_log_status = v4l2_ctrl_log_status,
+	.vidioc_subscribe_event = tw5864_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+	.vidioc_enum_framesizes = tw5864_enum_framesizes,
+	.vidioc_enum_frameintervals = tw5864_enum_frameintervals,
+	.vidioc_s_parm = tw5864_s_parm,
+	.vidioc_g_parm = tw5864_g_parm,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	.vidioc_g_register = tw5864_g_reg,
+	.vidioc_s_register = tw5864_s_reg,
+#endif
+};
+
+static struct video_device tw5864_video_template = {
+	.name = "tw5864_video",
+	.fops = &video_fops,
+	.ioctl_ops = &video_ioctl_ops,
+	.release = video_device_release_empty,
+	.tvnorms = TW5864_NORMS,
+	.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
+		V4L2_CAP_STREAMING,
+};
+
+/* Motion Detection Threshold matrix */
+static const struct v4l2_ctrl_config tw5864_md_thresholds = {
+	.ops = &tw5864_ctrl_ops,
+	.id = V4L2_CID_DETECT_MD_THRESHOLD_GRID,
+	.dims = {MD_CELLS_HOR, MD_CELLS_VERT},
+	.def = 14,
+	/* See tw5864_md_metric_from_mvd() */
+	.max = 2 * 0x0f,
+	.step = 1,
+};
+
+static int tw5864_video_input_init(struct tw5864_input *dev, int video_nr);
+static void tw5864_video_input_fini(struct tw5864_input *dev);
+static void tw5864_encoder_tables_upload(struct tw5864_dev *dev);
+
+int tw5864_video_init(struct tw5864_dev *dev, int *video_nr)
+{
+	int i;
+	int ret;
+	unsigned long flags;
+	int last_dma_allocated = -1;
+	int last_input_nr_registered = -1;
+
+	for (i = 0; i < H264_BUF_CNT; i++) {
+		struct tw5864_h264_frame *frame = &dev->h264_buf[i];
+
+		frame->vlc.addr = dma_alloc_coherent(&dev->pci->dev,
+						     H264_VLC_BUF_SIZE,
+						     &frame->vlc.dma_addr,
+						     GFP_KERNEL | GFP_DMA32);
+		if (!frame->vlc.addr) {
+			dev_err(&dev->pci->dev, "dma alloc fail\n");
+			ret = -ENOMEM;
+			goto free_dma;
+		}
+		frame->mv.addr = dma_alloc_coherent(&dev->pci->dev,
+						    H264_MV_BUF_SIZE,
+						    &frame->mv.dma_addr,
+						    GFP_KERNEL | GFP_DMA32);
+		if (!frame->mv.addr) {
+			dev_err(&dev->pci->dev, "dma alloc fail\n");
+			ret = -ENOMEM;
+			dma_free_coherent(&dev->pci->dev, H264_VLC_BUF_SIZE,
+					  frame->vlc.addr, frame->vlc.dma_addr);
+			goto free_dma;
+		}
+		last_dma_allocated = i;
+	}
+
+	tw5864_encoder_tables_upload(dev);
+
+	/* Picture is distorted without this block */
+	/* use falling edge to sample 54M to 108M */
+	tw_indir_writeb(TW5864_INDIR_VD_108_POL, TW5864_INDIR_VD_108_POL_BOTH);
+	tw_indir_writeb(TW5864_INDIR_CLK0_SEL, 0x00);
+
+	tw_indir_writeb(TW5864_INDIR_DDRA_DLL_DQS_SEL0, 0x02);
+	tw_indir_writeb(TW5864_INDIR_DDRA_DLL_DQS_SEL1, 0x02);
+	tw_indir_writeb(TW5864_INDIR_DDRA_DLL_CLK90_SEL, 0x02);
+	tw_indir_writeb(TW5864_INDIR_DDRB_DLL_DQS_SEL0, 0x02);
+	tw_indir_writeb(TW5864_INDIR_DDRB_DLL_DQS_SEL1, 0x02);
+	tw_indir_writeb(TW5864_INDIR_DDRB_DLL_CLK90_SEL, 0x02);
+
+	/* video input reset */
+	tw_indir_writeb(TW5864_INDIR_RESET, 0);
+	tw_indir_writeb(TW5864_INDIR_RESET, TW5864_INDIR_RESET_VD |
+			TW5864_INDIR_RESET_DLL | TW5864_INDIR_RESET_MUX_CORE);
+	msleep(20);
+
+	/*
+	 * Select Part A mode for all channels.
+	 * tw_setl instead of tw_clearl for Part B mode.
+	 *
+	 * I guess "Part B" is primarily for downscaled version of same channel
+	 * which goes in Part A of same bus
+	 */
+	tw_writel(TW5864_FULL_HALF_MODE_SEL, 0);
+
+	tw_indir_writeb(TW5864_INDIR_PV_VD_CK_POL,
+			TW5864_INDIR_PV_VD_CK_POL_VD(0) |
+			TW5864_INDIR_PV_VD_CK_POL_VD(1) |
+			TW5864_INDIR_PV_VD_CK_POL_VD(2) |
+			TW5864_INDIR_PV_VD_CK_POL_VD(3));
+
+	spin_lock_irqsave(&dev->slock, flags);
+	dev->encoder_busy = 0;
+	dev->h264_buf_r_index = 0;
+	dev->h264_buf_w_index = 0;
+	tw_writel(TW5864_VLC_STREAM_BASE_ADDR,
+		  dev->h264_buf[dev->h264_buf_w_index].vlc.dma_addr);
+	tw_writel(TW5864_MV_STREAM_BASE_ADDR,
+		  dev->h264_buf[dev->h264_buf_w_index].mv.dma_addr);
+	spin_unlock_irqrestore(&dev->slock, flags);
+
+	tw_writel(TW5864_SEN_EN_CH, 0x000f);
+	tw_writel(TW5864_H264EN_CH_EN, 0x000f);
+
+	tw_writel(TW5864_H264EN_BUS0_MAP, 0x00000000);
+	tw_writel(TW5864_H264EN_BUS1_MAP, 0x00001111);
+	tw_writel(TW5864_H264EN_BUS2_MAP, 0x00002222);
+	tw_writel(TW5864_H264EN_BUS3_MAP, 0x00003333);
+
+	/*
+	 * Quote from Intersil (manufacturer):
+	 * 0x0038 is managed by HW, and by default it won't pass the pointer set
+	 * at 0x0010. So if you don't do encoding, 0x0038 should stay at '3'
+	 * (with 4 frames in buffer). If you encode one frame and then move
+	 * 0x0010 to '1' for example, HW will take one more frame and set it to
+	 * buffer #0, and then you should see 0x0038 is set to '0'.  There is
+	 * only one HW encoder engine, so 4 channels cannot get encoded
+	 * simultaneously. But each channel does have its own buffer (for
+	 * original frames and reconstructed frames). So there is no problem to
+	 * manage encoding for 4 channels at same time and no need to force
+	 * I-frames in switching channels.
+	 * End of quote.
+	 *
+	 * If we set 0x0010 (TW5864_ENC_BUF_PTR_REC1) to 0 (for any channel), we
+	 * have no "rolling" (until we change this value).
+	 * If we set 0x0010 (TW5864_ENC_BUF_PTR_REC1) to 0x3, it starts to roll
+	 * continuously together with 0x0038.
+	 */
+	tw_writel(TW5864_ENC_BUF_PTR_REC1, 0x00ff);
+	tw_writel(TW5864_PCI_INTTM_SCALE, 0);
+
+	tw_writel(TW5864_INTERLACING, TW5864_DI_EN);
+	tw_writel(TW5864_MASTER_ENB_REG, TW5864_PCI_VLC_INTR_ENB);
+	tw_writel(TW5864_PCI_INTR_CTL,
+		  TW5864_TIMER_INTR_ENB | TW5864_PCI_MAST_ENB |
+		  TW5864_MVD_VLC_MAST_ENB);
+
+	dev->irqmask |= TW5864_INTR_VLC_DONE | TW5864_INTR_TIMER;
+	tw5864_irqmask_apply(dev);
+
+	tasklet_init(&dev->tasklet, tw5864_handle_frame_task,
+		     (unsigned long)dev);
+
+	for (i = 0; i < TW5864_INPUTS; i++) {
+		dev->inputs[i].root = dev;
+		dev->inputs[i].nr = i;
+		ret = tw5864_video_input_init(&dev->inputs[i], video_nr[i]);
+		if (ret)
+			goto fini_video_inputs;
+		last_input_nr_registered = i;
+	}
+
+	return 0;
+
+fini_video_inputs:
+	for (i = last_input_nr_registered; i >= 0; i--)
+		tw5864_video_input_fini(&dev->inputs[i]);
+
+	tasklet_kill(&dev->tasklet);
+
+free_dma:
+	for (i = last_dma_allocated; i >= 0; i--) {
+		dma_free_coherent(&dev->pci->dev, H264_VLC_BUF_SIZE,
+				  dev->h264_buf[i].vlc.addr,
+				  dev->h264_buf[i].vlc.dma_addr);
+		dma_free_coherent(&dev->pci->dev, H264_MV_BUF_SIZE,
+				  dev->h264_buf[i].mv.addr,
+				  dev->h264_buf[i].mv.dma_addr);
+	}
+
+	return ret;
+}
+
+static int tw5864_video_input_init(struct tw5864_input *input, int video_nr)
+{
+	struct tw5864_dev *dev = input->root;
+	int ret;
+	struct v4l2_ctrl_handler *hdl = &input->hdl;
+
+	mutex_init(&input->lock);
+	spin_lock_init(&input->slock);
+
+	/* setup video buffers queue */
+	INIT_LIST_HEAD(&input->active);
+	input->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	input->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	input->vidq.io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
+	input->vidq.ops = &tw5864_video_qops;
+	input->vidq.mem_ops = &vb2_dma_contig_memops;
+	input->vidq.drv_priv = input;
+	input->vidq.gfp_flags = 0;
+	input->vidq.buf_struct_size = sizeof(struct tw5864_buf);
+	input->vidq.lock = &input->lock;
+	input->vidq.min_buffers_needed = 2;
+	input->vidq.dev = &input->root->pci->dev;
+	ret = vb2_queue_init(&input->vidq);
+	if (ret)
+		goto free_mutex;
+
+	input->vdev = tw5864_video_template;
+	input->vdev.v4l2_dev = &input->root->v4l2_dev;
+	input->vdev.lock = &input->lock;
+	input->vdev.queue = &input->vidq;
+	video_set_drvdata(&input->vdev, input);
+
+	/* Initialize the device control structures */
+	v4l2_ctrl_handler_init(hdl, 6);
+	v4l2_ctrl_new_std(hdl, &tw5864_ctrl_ops,
+			  V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
+	v4l2_ctrl_new_std(hdl, &tw5864_ctrl_ops,
+			  V4L2_CID_CONTRAST, 0, 255, 1, 100);
+	v4l2_ctrl_new_std(hdl, &tw5864_ctrl_ops,
+			  V4L2_CID_SATURATION, 0, 255, 1, 128);
+	v4l2_ctrl_new_std(hdl, &tw5864_ctrl_ops, V4L2_CID_HUE, -128, 127, 1, 0);
+	v4l2_ctrl_new_std(hdl, &tw5864_ctrl_ops, V4L2_CID_MPEG_VIDEO_GOP_SIZE,
+			  1, MAX_GOP_SIZE, 1, GOP_SIZE);
+	v4l2_ctrl_new_std(hdl, &tw5864_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_H264_MIN_QP, 28, 51, 1, QP_VALUE);
+	v4l2_ctrl_new_std_menu(hdl, &tw5864_ctrl_ops,
+			       V4L2_CID_DETECT_MD_MODE,
+			       V4L2_DETECT_MD_MODE_THRESHOLD_GRID, 0,
+			       V4L2_DETECT_MD_MODE_DISABLED);
+	v4l2_ctrl_new_std(hdl, &tw5864_ctrl_ops,
+			  V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD,
+			  tw5864_md_thresholds.min, tw5864_md_thresholds.max,
+			  tw5864_md_thresholds.step, tw5864_md_thresholds.def);
+	input->md_threshold_grid_ctrl =
+		v4l2_ctrl_new_custom(hdl, &tw5864_md_thresholds, NULL);
+	if (hdl->error) {
+		ret = hdl->error;
+		goto free_v4l2_hdl;
+	}
+	input->vdev.ctrl_handler = hdl;
+	v4l2_ctrl_handler_setup(hdl);
+
+	input->qp = QP_VALUE;
+	input->gop = GOP_SIZE;
+	input->frame_interval = 1;
+
+	ret = video_register_device(&input->vdev, VFL_TYPE_GRABBER, video_nr);
+	if (ret)
+		goto free_v4l2_hdl;
+
+	dev_info(&input->root->pci->dev, "Registered video device %s\n",
+		 video_device_node_name(&input->vdev));
+
+	/*
+	 * Set default video standard. Doesn't matter which, the detected value
+	 * will be found out by VIDIOC_QUERYSTD handler.
+	 */
+	input->v4l2_std = V4L2_STD_NTSC_M;
+	input->std = STD_NTSC;
+
+	tw_indir_writeb(TW5864_INDIR_VIN_E(video_nr), 0x07);
+	/* to initiate auto format recognition */
+	tw_indir_writeb(TW5864_INDIR_VIN_F(video_nr), 0xff);
+
+	return 0;
+
+free_v4l2_hdl:
+	v4l2_ctrl_handler_free(hdl);
+	vb2_queue_release(&input->vidq);
+free_mutex:
+	mutex_destroy(&input->lock);
+
+	return ret;
+}
+
+static void tw5864_video_input_fini(struct tw5864_input *dev)
+{
+	video_unregister_device(&dev->vdev);
+	v4l2_ctrl_handler_free(&dev->hdl);
+	vb2_queue_release(&dev->vidq);
+}
+
+void tw5864_video_fini(struct tw5864_dev *dev)
+{
+	int i;
+
+	tasklet_kill(&dev->tasklet);
+
+	for (i = 0; i < TW5864_INPUTS; i++)
+		tw5864_video_input_fini(&dev->inputs[i]);
+
+	for (i = 0; i < H264_BUF_CNT; i++) {
+		dma_free_coherent(&dev->pci->dev, H264_VLC_BUF_SIZE,
+				  dev->h264_buf[i].vlc.addr,
+				  dev->h264_buf[i].vlc.dma_addr);
+		dma_free_coherent(&dev->pci->dev, H264_MV_BUF_SIZE,
+				  dev->h264_buf[i].mv.addr,
+				  dev->h264_buf[i].mv.dma_addr);
+	}
+}
+
+void tw5864_prepare_frame_headers(struct tw5864_input *input)
+{
+	struct tw5864_buf *vb = input->vb;
+	u8 *dst;
+	size_t dst_space;
+	unsigned long flags;
+	u8 *sl_hdr;
+	unsigned long space_before_sl_hdr;
+
+	if (!vb) {
+		spin_lock_irqsave(&input->slock, flags);
+		if (list_empty(&input->active)) {
+			spin_unlock_irqrestore(&input->slock, flags);
+			input->vb = NULL;
+			return;
+		}
+		vb = list_first_entry(&input->active, struct tw5864_buf, list);
+		list_del(&vb->list);
+		spin_unlock_irqrestore(&input->slock, flags);
+	}
+
+	dst = vb2_plane_vaddr(&vb->vb.vb2_buf, 0);
+	dst_space = vb2_plane_size(&vb->vb.vb2_buf, 0);
+
+	/*
+	 * Low-level bitstream writing functions don't have a fine way to say
+	 * correctly that supplied buffer is too small. So we just check there
+	 * and warn, and don't care at lower level.
+	 * Currently all headers take below 32 bytes.
+	 * The buffer is supposed to have plenty of free space at this point,
+	 * anyway.
+	 */
+	if (WARN_ON_ONCE(dst_space < 128))
+		return;
+
+	/*
+	 * Generate H264 headers:
+	 * If this is first frame, put SPS and PPS
+	 */
+	if (input->frame_gop_seqno == 0)
+		tw5864_h264_put_stream_header(&dst, &dst_space, input->qp,
+					      input->width, input->height);
+
+	/* Put slice header */
+	sl_hdr = dst;
+	space_before_sl_hdr = dst_space;
+	tw5864_h264_put_slice_header(&dst, &dst_space, input->h264_idr_pic_id,
+				     input->frame_gop_seqno,
+				     &input->tail_nb_bits, &input->tail);
+	input->vb = vb;
+	input->buf_cur_ptr = dst;
+	input->buf_cur_space_left = dst_space;
+}
+
+/*
+ * Returns heuristic motion detection metric value from known components of
+ * hardware-provided Motion Vector Data.
+ */
+static unsigned int tw5864_md_metric_from_mvd(u32 mvd)
+{
+	/*
+	 * Format of motion vector data exposed by tw5864, according to
+	 * manufacturer:
+	 * mv_x 10 bits
+	 * mv_y 10 bits
+	 * non_zero_members 8 bits
+	 * mb_type 3 bits
+	 * reserved 1 bit
+	 *
+	 * non_zero_members: number of non-zero residuals in each macro block
+	 * after quantization
+	 *
+	 * unsigned int reserved = mvd >> 31;
+	 * unsigned int mb_type = (mvd >> 28) & 0x7;
+	 * unsigned int non_zero_members = (mvd >> 20) & 0xff;
+	 */
+	unsigned int mv_y = (mvd >> 10) & 0x3ff;
+	unsigned int mv_x = mvd & 0x3ff;
+
+	/* heuristic: */
+	mv_x &= 0x0f;
+	mv_y &= 0x0f;
+
+	return mv_y + mv_x;
+}
+
+static int tw5864_is_motion_triggered(struct tw5864_h264_frame *frame)
+{
+	struct tw5864_input *input = frame->input;
+	u32 *mv = (u32 *)frame->mv.addr;
+	int i;
+	int detected = 0;
+
+	for (i = 0; i < MD_CELLS; i++) {
+		const u16 thresh = input->md_threshold_grid_values[i];
+		const unsigned int metric = tw5864_md_metric_from_mvd(mv[i]);
+
+		if (metric > thresh)
+			detected = 1;
+
+		if (detected)
+			break;
+	}
+	return detected;
+}
+
+static void tw5864_handle_frame_task(unsigned long data)
+{
+	struct tw5864_dev *dev = (struct tw5864_dev *)data;
+	unsigned long flags;
+	int batch_size = H264_BUF_CNT;
+
+	spin_lock_irqsave(&dev->slock, flags);
+	while (dev->h264_buf_r_index != dev->h264_buf_w_index && batch_size--) {
+		struct tw5864_h264_frame *frame =
+			&dev->h264_buf[dev->h264_buf_r_index];
+
+		spin_unlock_irqrestore(&dev->slock, flags);
+		dma_sync_single_for_cpu(&dev->pci->dev, frame->vlc.dma_addr,
+					H264_VLC_BUF_SIZE, DMA_FROM_DEVICE);
+		dma_sync_single_for_cpu(&dev->pci->dev, frame->mv.dma_addr,
+					H264_MV_BUF_SIZE, DMA_FROM_DEVICE);
+		tw5864_handle_frame(frame);
+		dma_sync_single_for_device(&dev->pci->dev, frame->vlc.dma_addr,
+					   H264_VLC_BUF_SIZE, DMA_FROM_DEVICE);
+		dma_sync_single_for_device(&dev->pci->dev, frame->mv.dma_addr,
+					   H264_MV_BUF_SIZE, DMA_FROM_DEVICE);
+		spin_lock_irqsave(&dev->slock, flags);
+
+		dev->h264_buf_r_index++;
+		dev->h264_buf_r_index %= H264_BUF_CNT;
+	}
+	spin_unlock_irqrestore(&dev->slock, flags);
+}
+
+#ifdef DEBUG
+static u32 tw5864_vlc_checksum(u32 *data, int len)
+{
+	u32 val, count_len = len;
+
+	val = *data++;
+	while (((count_len >> 2) - 1) > 0) {
+		val ^= *data++;
+		count_len -= 4;
+	}
+	val ^= htonl((len >> 2));
+	return val;
+}
+#endif
+
+static void tw5864_handle_frame(struct tw5864_h264_frame *frame)
+{
+#define SKIP_VLCBUF_BYTES 3
+	struct tw5864_input *input = frame->input;
+	struct tw5864_dev *dev = input->root;
+	struct tw5864_buf *vb;
+	struct vb2_v4l2_buffer *v4l2_buf;
+	int frame_len = frame->vlc_len - SKIP_VLCBUF_BYTES;
+	u8 *dst = input->buf_cur_ptr;
+	u8 tail_mask, vlc_mask = 0;
+	int i;
+	u8 vlc_first_byte = ((u8 *)(frame->vlc.addr + SKIP_VLCBUF_BYTES))[0];
+	unsigned long flags;
+	int zero_run;
+	u8 *src;
+	u8 *src_end;
+
+#ifdef DEBUG
+	if (frame->checksum !=
+	    tw5864_vlc_checksum((u32 *)frame->vlc.addr, frame_len))
+		dev_err(&dev->pci->dev,
+			"Checksum of encoded frame doesn't match!\n");
+#endif
+
+	spin_lock_irqsave(&input->slock, flags);
+	vb = input->vb;
+	input->vb = NULL;
+	spin_unlock_irqrestore(&input->slock, flags);
+
+	v4l2_buf = to_vb2_v4l2_buffer(&vb->vb.vb2_buf);
+
+	if (!vb) { /* Gone because of disabling */
+		dev_dbg(&dev->pci->dev, "vb is empty, dropping frame\n");
+		return;
+	}
+
+	/*
+	 * Check for space.
+	 * Mind the overhead of startcode emulation prevention.
+	 */
+	if (input->buf_cur_space_left < frame_len * 5 / 4) {
+		dev_err_once(&dev->pci->dev,
+			     "Left space in vb2 buffer, %d bytes, is less than considered safely enough to put frame of length %d. Dropping this frame.\n",
+			     input->buf_cur_space_left, frame_len);
+		return;
+	}
+
+	for (i = 0; i < 8 - input->tail_nb_bits; i++)
+		vlc_mask |= 1 << i;
+	tail_mask = (~vlc_mask) & 0xff;
+
+	dst[0] = (input->tail & tail_mask) | (vlc_first_byte & vlc_mask);
+	frame_len--;
+	dst++;
+
+	/* H.264 startcode emulation prevention */
+	src = frame->vlc.addr + SKIP_VLCBUF_BYTES + 1;
+	src_end = src + frame_len;
+	zero_run = 0;
+	for (; src < src_end; src++) {
+		if (zero_run < 2) {
+			if (*src == 0)
+				++zero_run;
+			else
+				zero_run = 0;
+		} else {
+			if ((*src & ~0x03) == 0)
+				*dst++ = 0x03;
+			zero_run = *src == 0;
+		}
+		*dst++ = *src;
+	}
+
+	vb2_set_plane_payload(&vb->vb.vb2_buf, 0,
+			      dst - (u8 *)vb2_plane_vaddr(&vb->vb.vb2_buf, 0));
+
+	vb->vb.vb2_buf.timestamp = frame->timestamp;
+	v4l2_buf->field = V4L2_FIELD_INTERLACED;
+	v4l2_buf->sequence = frame->seqno;
+
+	/* Check for motion flags */
+	if (frame->gop_seqno /* P-frame */ &&
+	    tw5864_is_motion_triggered(frame)) {
+		struct v4l2_event ev = {
+			.type = V4L2_EVENT_MOTION_DET,
+			.u.motion_det = {
+				.flags = V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ,
+				.frame_sequence = v4l2_buf->sequence,
+			},
+		};
+
+		v4l2_event_queue(&input->vdev, &ev);
+	}
+
+	vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
+}
+
+static v4l2_std_id tw5864_get_v4l2_std(enum tw5864_vid_std std)
+{
+	switch (std) {
+	case STD_NTSC:    return V4L2_STD_NTSC_M;
+	case STD_PAL:     return V4L2_STD_PAL_B;
+	case STD_SECAM:   return V4L2_STD_SECAM_B;
+	case STD_NTSC443: return V4L2_STD_NTSC_443;
+	case STD_PAL_M:   return V4L2_STD_PAL_M;
+	case STD_PAL_CN:  return V4L2_STD_PAL_Nc;
+	case STD_PAL_60:  return V4L2_STD_PAL_60;
+	case STD_INVALID: return V4L2_STD_UNKNOWN;
+	}
+	return 0;
+}
+
+static enum tw5864_vid_std tw5864_from_v4l2_std(v4l2_std_id v4l2_std)
+{
+	if (v4l2_std & V4L2_STD_NTSC_M)
+		return STD_NTSC;
+	if (v4l2_std & V4L2_STD_PAL_B)
+		return STD_PAL;
+	if (v4l2_std & V4L2_STD_SECAM_B)
+		return STD_SECAM;
+	if (v4l2_std & V4L2_STD_NTSC_443)
+		return STD_NTSC443;
+	if (v4l2_std & V4L2_STD_PAL_M)
+		return STD_PAL_M;
+	if (v4l2_std & V4L2_STD_PAL_Nc)
+		return STD_PAL_CN;
+	if (v4l2_std & V4L2_STD_PAL_60)
+		return STD_PAL_60;
+
+	return STD_INVALID;
+}
+
+static void tw5864_encoder_tables_upload(struct tw5864_dev *dev)
+{
+	int i;
+
+	tw_writel(TW5864_VLC_RD, 0x1);
+	for (i = 0; i < VLC_LOOKUP_TABLE_LEN; i++) {
+		tw_writel((TW5864_VLC_STREAM_MEM_START + i * 4),
+			  encoder_vlc_lookup_table[i]);
+	}
+	tw_writel(TW5864_VLC_RD, 0x0);
+
+	for (i = 0; i < QUANTIZATION_TABLE_LEN; i++) {
+		tw_writel((TW5864_QUAN_TAB + i * 4),
+			  forward_quantization_table[i]);
+	}
+
+	for (i = 0; i < QUANTIZATION_TABLE_LEN; i++) {
+		tw_writel((TW5864_QUAN_TAB + i * 4),
+			  inverse_quantization_table[i]);
+	}
+}