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linux/drivers/media/platform/rcar-vin/rcar-dma.c
Niklas Söderlund b6f556cb93 [media] media: rcar-vin: add support for V4L2_FIELD_ALTERNATE 
The HW can capture both ODD and EVEN fields in separate buffers so it's
possible to support V4L2_FIELD_ALTERNATE. This patch add support for
this mode.

At probe time and when S_STD is called the driver will default to use
V4L2_FIELD_INTERLACED if the subdevice reports V4L2_FIELD_ALTERNATE. The
driver will only change the field type if the subdevice implements
G_STD, if not it will keep the default at V4L2_FIELD_ALTERNATE.

The user can always explicitly ask for V4L2_FIELD_ALTERNATE in S_FMT and
the driver will use that field format.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-09-19 16:33:41 -03:00

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/*
* Driver for Renesas R-Car VIN
*
* Copyright (C) 2016 Renesas Electronics Corp.
* Copyright (C) 2011-2013 Renesas Solutions Corp.
* Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
* Copyright (C) 2008 Magnus Damm
*
* Based on the soc-camera rcar_vin driver
*
* 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.
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <media/videobuf2-dma-contig.h>
#include "rcar-vin.h"
/* -----------------------------------------------------------------------------
* HW Functions
*/
/* Register offsets for R-Car VIN */
#define VNMC_REG 0x00 /* Video n Main Control Register */
#define VNMS_REG 0x04 /* Video n Module Status Register */
#define VNFC_REG 0x08 /* Video n Frame Capture Register */
#define VNSLPRC_REG 0x0C /* Video n Start Line Pre-Clip Register */
#define VNELPRC_REG 0x10 /* Video n End Line Pre-Clip Register */
#define VNSPPRC_REG 0x14 /* Video n Start Pixel Pre-Clip Register */
#define VNEPPRC_REG 0x18 /* Video n End Pixel Pre-Clip Register */
#define VNSLPOC_REG 0x1C /* Video n Start Line Post-Clip Register */
#define VNELPOC_REG 0x20 /* Video n End Line Post-Clip Register */
#define VNSPPOC_REG 0x24 /* Video n Start Pixel Post-Clip Register */
#define VNEPPOC_REG 0x28 /* Video n End Pixel Post-Clip Register */
#define VNIS_REG 0x2C /* Video n Image Stride Register */
#define VNMB_REG(m) (0x30 + ((m) << 2)) /* Video n Memory Base m Register */
#define VNIE_REG 0x40 /* Video n Interrupt Enable Register */
#define VNINTS_REG 0x44 /* Video n Interrupt Status Register */
#define VNSI_REG 0x48 /* Video n Scanline Interrupt Register */
#define VNMTC_REG 0x4C /* Video n Memory Transfer Control Register */
#define VNYS_REG 0x50 /* Video n Y Scale Register */
#define VNXS_REG 0x54 /* Video n X Scale Register */
#define VNDMR_REG 0x58 /* Video n Data Mode Register */
#define VNDMR2_REG 0x5C /* Video n Data Mode Register 2 */
#define VNUVAOF_REG 0x60 /* Video n UV Address Offset Register */
#define VNC1A_REG 0x80 /* Video n Coefficient Set C1A Register */
#define VNC1B_REG 0x84 /* Video n Coefficient Set C1B Register */
#define VNC1C_REG 0x88 /* Video n Coefficient Set C1C Register */
#define VNC2A_REG 0x90 /* Video n Coefficient Set C2A Register */
#define VNC2B_REG 0x94 /* Video n Coefficient Set C2B Register */
#define VNC2C_REG 0x98 /* Video n Coefficient Set C2C Register */
#define VNC3A_REG 0xA0 /* Video n Coefficient Set C3A Register */
#define VNC3B_REG 0xA4 /* Video n Coefficient Set C3B Register */
#define VNC3C_REG 0xA8 /* Video n Coefficient Set C3C Register */
#define VNC4A_REG 0xB0 /* Video n Coefficient Set C4A Register */
#define VNC4B_REG 0xB4 /* Video n Coefficient Set C4B Register */
#define VNC4C_REG 0xB8 /* Video n Coefficient Set C4C Register */
#define VNC5A_REG 0xC0 /* Video n Coefficient Set C5A Register */
#define VNC5B_REG 0xC4 /* Video n Coefficient Set C5B Register */
#define VNC5C_REG 0xC8 /* Video n Coefficient Set C5C Register */
#define VNC6A_REG 0xD0 /* Video n Coefficient Set C6A Register */
#define VNC6B_REG 0xD4 /* Video n Coefficient Set C6B Register */
#define VNC6C_REG 0xD8 /* Video n Coefficient Set C6C Register */
#define VNC7A_REG 0xE0 /* Video n Coefficient Set C7A Register */
#define VNC7B_REG 0xE4 /* Video n Coefficient Set C7B Register */
#define VNC7C_REG 0xE8 /* Video n Coefficient Set C7C Register */
#define VNC8A_REG 0xF0 /* Video n Coefficient Set C8A Register */
#define VNC8B_REG 0xF4 /* Video n Coefficient Set C8B Register */
#define VNC8C_REG 0xF8 /* Video n Coefficient Set C8C Register */
/* Register bit fields for R-Car VIN */
/* Video n Main Control Register bits */
#define VNMC_FOC (1 << 21)
#define VNMC_YCAL (1 << 19)
#define VNMC_INF_YUV8_BT656 (0 << 16)
#define VNMC_INF_YUV8_BT601 (1 << 16)
#define VNMC_INF_YUV10_BT656 (2 << 16)
#define VNMC_INF_YUV10_BT601 (3 << 16)
#define VNMC_INF_YUV16 (5 << 16)
#define VNMC_INF_RGB888 (6 << 16)
#define VNMC_VUP (1 << 10)
#define VNMC_IM_ODD (0 << 3)
#define VNMC_IM_ODD_EVEN (1 << 3)
#define VNMC_IM_EVEN (2 << 3)
#define VNMC_IM_FULL (3 << 3)
#define VNMC_BPS (1 << 1)
#define VNMC_ME (1 << 0)
/* Video n Module Status Register bits */
#define VNMS_FBS_MASK (3 << 3)
#define VNMS_FBS_SHIFT 3
#define VNMS_FS (1 << 2)
#define VNMS_AV (1 << 1)
#define VNMS_CA (1 << 0)
/* Video n Frame Capture Register bits */
#define VNFC_C_FRAME (1 << 1)
#define VNFC_S_FRAME (1 << 0)
/* Video n Interrupt Enable Register bits */
#define VNIE_FIE (1 << 4)
#define VNIE_EFE (1 << 1)
/* Video n Data Mode Register bits */
#define VNDMR_EXRGB (1 << 8)
#define VNDMR_BPSM (1 << 4)
#define VNDMR_DTMD_YCSEP (1 << 1)
#define VNDMR_DTMD_ARGB1555 (1 << 0)
/* Video n Data Mode Register 2 bits */
#define VNDMR2_VPS (1 << 30)
#define VNDMR2_HPS (1 << 29)
#define VNDMR2_FTEV (1 << 17)
#define VNDMR2_VLV(n) ((n & 0xf) << 12)
static void rvin_write(struct rvin_dev *vin, u32 value, u32 offset)
{
iowrite32(value, vin->base + offset);
}
static u32 rvin_read(struct rvin_dev *vin, u32 offset)
{
return ioread32(vin->base + offset);
}
static int rvin_setup(struct rvin_dev *vin)
{
u32 vnmc, dmr, dmr2, interrupts;
v4l2_std_id std;
bool progressive = false, output_is_yuv = false, input_is_yuv = false;
switch (vin->format.field) {
case V4L2_FIELD_TOP:
vnmc = VNMC_IM_ODD;
break;
case V4L2_FIELD_BOTTOM:
vnmc = VNMC_IM_EVEN;
break;
case V4L2_FIELD_INTERLACED:
/* Default to TB */
vnmc = VNMC_IM_FULL;
/* Use BT if video standard can be read and is 60 Hz format */
if (!v4l2_subdev_call(vin_to_source(vin), video, g_std, &std)) {
if (std & V4L2_STD_525_60)
vnmc = VNMC_IM_FULL | VNMC_FOC;
}
break;
case V4L2_FIELD_INTERLACED_TB:
vnmc = VNMC_IM_FULL;
break;
case V4L2_FIELD_INTERLACED_BT:
vnmc = VNMC_IM_FULL | VNMC_FOC;
break;
case V4L2_FIELD_ALTERNATE:
case V4L2_FIELD_NONE:
if (vin->continuous) {
vnmc = VNMC_IM_ODD_EVEN;
progressive = true;
} else {
vnmc = VNMC_IM_ODD;
}
break;
default:
vnmc = VNMC_IM_ODD;
break;
}
/*
* Input interface
*/
switch (vin->digital.code) {
case MEDIA_BUS_FMT_YUYV8_1X16:
/* BT.601/BT.1358 16bit YCbCr422 */
vnmc |= VNMC_INF_YUV16;
input_is_yuv = true;
break;
case MEDIA_BUS_FMT_UYVY8_2X8:
/* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */
vnmc |= vin->digital.mbus_cfg.type == V4L2_MBUS_BT656 ?
VNMC_INF_YUV8_BT656 : VNMC_INF_YUV8_BT601;
input_is_yuv = true;
break;
case MEDIA_BUS_FMT_RGB888_1X24:
vnmc |= VNMC_INF_RGB888;
break;
case MEDIA_BUS_FMT_UYVY10_2X10:
/* BT.656 10bit YCbCr422 or BT.601 10bit YCbCr422 */
vnmc |= vin->digital.mbus_cfg.type == V4L2_MBUS_BT656 ?
VNMC_INF_YUV10_BT656 : VNMC_INF_YUV10_BT601;
input_is_yuv = true;
break;
default:
break;
}
/* Enable VSYNC Field Toogle mode after one VSYNC input */
dmr2 = VNDMR2_FTEV | VNDMR2_VLV(1);
/* Hsync Signal Polarity Select */
if (!(vin->digital.mbus_cfg.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW))
dmr2 |= VNDMR2_HPS;
/* Vsync Signal Polarity Select */
if (!(vin->digital.mbus_cfg.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW))
dmr2 |= VNDMR2_VPS;
/*
* Output format
*/
switch (vin->format.pixelformat) {
case V4L2_PIX_FMT_NV16:
rvin_write(vin,
ALIGN(vin->format.width * vin->format.height, 0x80),
VNUVAOF_REG);
dmr = VNDMR_DTMD_YCSEP;
output_is_yuv = true;
break;
case V4L2_PIX_FMT_YUYV:
dmr = VNDMR_BPSM;
output_is_yuv = true;
break;
case V4L2_PIX_FMT_UYVY:
dmr = 0;
output_is_yuv = true;
break;
case V4L2_PIX_FMT_XRGB555:
dmr = VNDMR_DTMD_ARGB1555;
break;
case V4L2_PIX_FMT_RGB565:
dmr = 0;
break;
case V4L2_PIX_FMT_XBGR32:
/* Note: not supported on M1 */
dmr = VNDMR_EXRGB;
break;
default:
vin_err(vin, "Invalid pixelformat (0x%x)\n",
vin->format.pixelformat);
return -EINVAL;
}
/* Always update on field change */
vnmc |= VNMC_VUP;
/* If input and output use the same colorspace, use bypass mode */
if (input_is_yuv == output_is_yuv)
vnmc |= VNMC_BPS;
/* Progressive or interlaced mode */
interrupts = progressive ? VNIE_FIE : VNIE_EFE;
/* Ack interrupts */
rvin_write(vin, interrupts, VNINTS_REG);
/* Enable interrupts */
rvin_write(vin, interrupts, VNIE_REG);
/* Start capturing */
rvin_write(vin, dmr, VNDMR_REG);
rvin_write(vin, dmr2, VNDMR2_REG);
/* Enable module */
rvin_write(vin, vnmc | VNMC_ME, VNMC_REG);
return 0;
}
static void rvin_capture_on(struct rvin_dev *vin)
{
vin_dbg(vin, "Capture on in %s mode\n",
vin->continuous ? "continuous" : "single");
if (vin->continuous)
/* Continuous Frame Capture Mode */
rvin_write(vin, VNFC_C_FRAME, VNFC_REG);
else
/* Single Frame Capture Mode */
rvin_write(vin, VNFC_S_FRAME, VNFC_REG);
}
static void rvin_capture_off(struct rvin_dev *vin)
{
/* Set continuous & single transfer off */
rvin_write(vin, 0, VNFC_REG);
}
static int rvin_capture_start(struct rvin_dev *vin)
{
int ret;
rvin_crop_scale_comp(vin);
ret = rvin_setup(vin);
if (ret)
return ret;
rvin_capture_on(vin);
return 0;
}
static void rvin_capture_stop(struct rvin_dev *vin)
{
rvin_capture_off(vin);
/* Disable module */
rvin_write(vin, rvin_read(vin, VNMC_REG) & ~VNMC_ME, VNMC_REG);
}
static void rvin_disable_interrupts(struct rvin_dev *vin)
{
rvin_write(vin, 0, VNIE_REG);
}
static u32 rvin_get_interrupt_status(struct rvin_dev *vin)
{
return rvin_read(vin, VNINTS_REG);
}
static void rvin_ack_interrupt(struct rvin_dev *vin)
{
rvin_write(vin, rvin_read(vin, VNINTS_REG), VNINTS_REG);
}
static bool rvin_capture_active(struct rvin_dev *vin)
{
return rvin_read(vin, VNMS_REG) & VNMS_CA;
}
static int rvin_get_active_slot(struct rvin_dev *vin, u32 vnms)
{
if (vin->continuous)
return (vnms & VNMS_FBS_MASK) >> VNMS_FBS_SHIFT;
return 0;
}
static enum v4l2_field rvin_get_active_field(struct rvin_dev *vin, u32 vnms)
{
if (vin->format.field == V4L2_FIELD_ALTERNATE) {
/* If FS is set it's a Even field */
if (vnms & VNMS_FS)
return V4L2_FIELD_BOTTOM;
return V4L2_FIELD_TOP;
}
return vin->format.field;
}
static void rvin_set_slot_addr(struct rvin_dev *vin, int slot, dma_addr_t addr)
{
const struct rvin_video_format *fmt;
int offsetx, offsety;
dma_addr_t offset;
fmt = rvin_format_from_pixel(vin->format.pixelformat);
/*
* There is no HW support for composition do the beast we can
* by modifying the buffer offset
*/
offsetx = vin->compose.left * fmt->bpp;
offsety = vin->compose.top * vin->format.bytesperline;
offset = addr + offsetx + offsety;
/*
* The address needs to be 128 bytes aligned. Driver should never accept
* settings that do not satisfy this in the first place...
*/
if (WARN_ON((offsetx | offsety | offset) & HW_BUFFER_MASK))
return;
rvin_write(vin, offset, VNMB_REG(slot));
}
/* -----------------------------------------------------------------------------
* Crop and Scaling Gen2
*/
struct vin_coeff {
unsigned short xs_value;
u32 coeff_set[24];
};
static const struct vin_coeff vin_coeff_set[] = {
{ 0x0000, {
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000 },
},
{ 0x1000, {
0x000fa400, 0x000fa400, 0x09625902,
0x000003f8, 0x00000403, 0x3de0d9f0,
0x001fffed, 0x00000804, 0x3cc1f9c3,
0x001003de, 0x00000c01, 0x3cb34d7f,
0x002003d2, 0x00000c00, 0x3d24a92d,
0x00200bca, 0x00000bff, 0x3df600d2,
0x002013cc, 0x000007ff, 0x3ed70c7e,
0x00100fde, 0x00000000, 0x3f87c036 },
},
{ 0x1200, {
0x002ffff1, 0x002ffff1, 0x02a0a9c8,
0x002003e7, 0x001ffffa, 0x000185bc,
0x002007dc, 0x000003ff, 0x3e52859c,
0x00200bd4, 0x00000002, 0x3d53996b,
0x00100fd0, 0x00000403, 0x3d04ad2d,
0x00000bd5, 0x00000403, 0x3d35ace7,
0x3ff003e4, 0x00000801, 0x3dc674a1,
0x3fffe800, 0x00000800, 0x3e76f461 },
},
{ 0x1400, {
0x00100be3, 0x00100be3, 0x04d1359a,
0x00000fdb, 0x002003ed, 0x0211fd93,
0x00000fd6, 0x002003f4, 0x0002d97b,
0x000007d6, 0x002ffffb, 0x3e93b956,
0x3ff003da, 0x001003ff, 0x3db49926,
0x3fffefe9, 0x00100001, 0x3d655cee,
0x3fffd400, 0x00000003, 0x3d65f4b6,
0x000fb421, 0x00000402, 0x3dc6547e },
},
{ 0x1600, {
0x00000bdd, 0x00000bdd, 0x06519578,
0x3ff007da, 0x00000be3, 0x03c24973,
0x3ff003d9, 0x00000be9, 0x01b30d5f,
0x3ffff7df, 0x001003f1, 0x0003c542,
0x000fdfec, 0x001003f7, 0x3ec4711d,
0x000fc400, 0x002ffffd, 0x3df504f1,
0x001fa81a, 0x002ffc00, 0x3d957cc2,
0x002f8c3c, 0x00100000, 0x3db5c891 },
},
{ 0x1800, {
0x3ff003dc, 0x3ff003dc, 0x0791e558,
0x000ff7dd, 0x3ff007de, 0x05328554,
0x000fe7e3, 0x3ff00be2, 0x03232546,
0x000fd7ee, 0x000007e9, 0x0143bd30,
0x001fb800, 0x000007ee, 0x00044511,
0x002fa015, 0x000007f4, 0x3ef4bcee,
0x002f8832, 0x001003f9, 0x3e4514c7,
0x001f7853, 0x001003fd, 0x3de54c9f },
},
{ 0x1a00, {
0x000fefe0, 0x000fefe0, 0x08721d3c,
0x001fdbe7, 0x000ffbde, 0x0652a139,
0x001fcbf0, 0x000003df, 0x0463292e,
0x002fb3ff, 0x3ff007e3, 0x0293a91d,
0x002f9c12, 0x3ff00be7, 0x01241905,
0x001f8c29, 0x000007ed, 0x3fe470eb,
0x000f7c46, 0x000007f2, 0x3f04b8ca,
0x3fef7865, 0x000007f6, 0x3e74e4a8 },
},
{ 0x1c00, {
0x001fd3e9, 0x001fd3e9, 0x08f23d26,
0x002fbff3, 0x001fe3e4, 0x0712ad23,
0x002fa800, 0x000ff3e0, 0x05631d1b,
0x001f9810, 0x000ffbe1, 0x03b3890d,
0x000f8c23, 0x000003e3, 0x0233e8fa,
0x3fef843b, 0x000003e7, 0x00f430e4,
0x3fbf8456, 0x3ff00bea, 0x00046cc8,
0x3f8f8c72, 0x3ff00bef, 0x3f3490ac },
},
{ 0x1e00, {
0x001fbbf4, 0x001fbbf4, 0x09425112,
0x001fa800, 0x002fc7ed, 0x0792b110,
0x000f980e, 0x001fdbe6, 0x0613110a,
0x3fff8c20, 0x001fe7e3, 0x04a368fd,
0x3fcf8c33, 0x000ff7e2, 0x0343b8ed,
0x3f9f8c4a, 0x000fffe3, 0x0203f8da,
0x3f5f9c61, 0x000003e6, 0x00e428c5,
0x3f1fb07b, 0x000003eb, 0x3fe440af },
},
{ 0x2000, {
0x000fa400, 0x000fa400, 0x09625902,
0x3fff980c, 0x001fb7f5, 0x0812b0ff,
0x3fdf901c, 0x001fc7ed, 0x06b2fcfa,
0x3faf902d, 0x001fd3e8, 0x055348f1,
0x3f7f983f, 0x001fe3e5, 0x04038ce3,
0x3f3fa454, 0x001fefe3, 0x02e3c8d1,
0x3f0fb86a, 0x001ff7e4, 0x01c3e8c0,
0x3ecfd880, 0x000fffe6, 0x00c404ac },
},
{ 0x2200, {
0x3fdf9c0b, 0x3fdf9c0b, 0x09725cf4,
0x3fbf9818, 0x3fffa400, 0x0842a8f1,
0x3f8f9827, 0x000fb3f7, 0x0702f0ec,
0x3f5fa037, 0x000fc3ef, 0x05d330e4,
0x3f2fac49, 0x001fcfea, 0x04a364d9,
0x3effc05c, 0x001fdbe7, 0x038394ca,
0x3ecfdc6f, 0x001fe7e6, 0x0273b0bb,
0x3ea00083, 0x001fefe6, 0x0183c0a9 },
},
{ 0x2400, {
0x3f9fa014, 0x3f9fa014, 0x098260e6,
0x3f7f9c23, 0x3fcf9c0a, 0x08629ce5,
0x3f4fa431, 0x3fefa400, 0x0742d8e1,
0x3f1fb440, 0x3fffb3f8, 0x062310d9,
0x3eefc850, 0x000fbbf2, 0x050340d0,
0x3ecfe062, 0x000fcbec, 0x041364c2,
0x3ea00073, 0x001fd3ea, 0x03037cb5,
0x3e902086, 0x001fdfe8, 0x022388a5 },
},
{ 0x2600, {
0x3f5fa81e, 0x3f5fa81e, 0x096258da,
0x3f3fac2b, 0x3f8fa412, 0x088290d8,
0x3f0fbc38, 0x3fafa408, 0x0772c8d5,
0x3eefcc47, 0x3fcfa800, 0x0672f4ce,
0x3ecfe456, 0x3fefaffa, 0x05531cc6,
0x3eb00066, 0x3fffbbf3, 0x047334bb,
0x3ea01c77, 0x000fc7ee, 0x039348ae,
0x3ea04486, 0x000fd3eb, 0x02b350a1 },
},
{ 0x2800, {
0x3f2fb426, 0x3f2fb426, 0x094250ce,
0x3f0fc032, 0x3f4fac1b, 0x086284cd,
0x3eefd040, 0x3f7fa811, 0x0782acc9,
0x3ecfe84c, 0x3f9fa807, 0x06a2d8c4,
0x3eb0005b, 0x3fbfac00, 0x05b2f4bc,
0x3eb0186a, 0x3fdfb3fa, 0x04c308b4,
0x3eb04077, 0x3fefbbf4, 0x03f31ca8,
0x3ec06884, 0x000fbff2, 0x03031c9e },
},
{ 0x2a00, {
0x3f0fc42d, 0x3f0fc42d, 0x090240c4,
0x3eefd439, 0x3f2fb822, 0x08526cc2,
0x3edfe845, 0x3f4fb018, 0x078294bf,
0x3ec00051, 0x3f6fac0f, 0x06b2b4bb,
0x3ec0185f, 0x3f8fac07, 0x05e2ccb4,
0x3ec0386b, 0x3fafac00, 0x0502e8ac,
0x3ed05c77, 0x3fcfb3fb, 0x0432f0a3,
0x3ef08482, 0x3fdfbbf6, 0x0372f898 },
},
{ 0x2c00, {
0x3eefdc31, 0x3eefdc31, 0x08e238b8,
0x3edfec3d, 0x3f0fc828, 0x082258b9,
0x3ed00049, 0x3f1fc01e, 0x077278b6,
0x3ed01455, 0x3f3fb815, 0x06c294b2,
0x3ed03460, 0x3f5fb40d, 0x0602acac,
0x3ef0506c, 0x3f7fb006, 0x0542c0a4,
0x3f107476, 0x3f9fb400, 0x0472c89d,
0x3f309c80, 0x3fbfb7fc, 0x03b2cc94 },
},
{ 0x2e00, {
0x3eefec37, 0x3eefec37, 0x088220b0,
0x3ee00041, 0x3effdc2d, 0x07f244ae,
0x3ee0144c, 0x3f0fd023, 0x07625cad,
0x3ef02c57, 0x3f1fc81a, 0x06c274a9,
0x3f004861, 0x3f3fbc13, 0x060288a6,
0x3f20686b, 0x3f5fb80c, 0x05529c9e,
0x3f408c74, 0x3f6fb805, 0x04b2ac96,
0x3f80ac7e, 0x3f8fb800, 0x0402ac8e },
},
{ 0x3000, {
0x3ef0003a, 0x3ef0003a, 0x084210a6,
0x3ef01045, 0x3effec32, 0x07b228a7,
0x3f00284e, 0x3f0fdc29, 0x073244a4,
0x3f104058, 0x3f0fd420, 0x06a258a2,
0x3f305c62, 0x3f2fc818, 0x0612689d,
0x3f508069, 0x3f3fc011, 0x05728496,
0x3f80a072, 0x3f4fc00a, 0x04d28c90,
0x3fc0c07b, 0x3f6fbc04, 0x04429088 },
},
{ 0x3200, {
0x3f00103e, 0x3f00103e, 0x07f1fc9e,
0x3f102447, 0x3f000035, 0x0782149d,
0x3f203c4f, 0x3f0ff02c, 0x07122c9c,
0x3f405458, 0x3f0fe424, 0x06924099,
0x3f607061, 0x3f1fd41d, 0x06024c97,
0x3f909068, 0x3f2fcc16, 0x05726490,
0x3fc0b070, 0x3f3fc80f, 0x04f26c8a,
0x0000d077, 0x3f4fc409, 0x04627484 },
},
{ 0x3400, {
0x3f202040, 0x3f202040, 0x07a1e898,
0x3f303449, 0x3f100c38, 0x0741fc98,
0x3f504c50, 0x3f10002f, 0x06e21495,
0x3f706459, 0x3f1ff028, 0x06722492,
0x3fa08060, 0x3f1fe421, 0x05f2348f,
0x3fd09c67, 0x3f1fdc19, 0x05824c89,
0x0000bc6e, 0x3f2fd014, 0x04f25086,
0x0040dc74, 0x3f3fcc0d, 0x04825c7f },
},
{ 0x3600, {
0x3f403042, 0x3f403042, 0x0761d890,
0x3f504848, 0x3f301c3b, 0x0701f090,
0x3f805c50, 0x3f200c33, 0x06a2008f,
0x3fa07458, 0x3f10002b, 0x06520c8d,
0x3fd0905e, 0x3f1ff424, 0x05e22089,
0x0000ac65, 0x3f1fe81d, 0x05823483,
0x0030cc6a, 0x3f2fdc18, 0x04f23c81,
0x0080e871, 0x3f2fd412, 0x0482407c },
},
{ 0x3800, {
0x3f604043, 0x3f604043, 0x0721c88a,
0x3f80544a, 0x3f502c3c, 0x06d1d88a,
0x3fb06851, 0x3f301c35, 0x0681e889,
0x3fd08456, 0x3f30082f, 0x0611fc88,
0x00009c5d, 0x3f200027, 0x05d20884,
0x0030b863, 0x3f2ff421, 0x05621880,
0x0070d468, 0x3f2fe81b, 0x0502247c,
0x00c0ec6f, 0x3f2fe015, 0x04a22877 },
},
{ 0x3a00, {
0x3f904c44, 0x3f904c44, 0x06e1b884,
0x3fb0604a, 0x3f70383e, 0x0691c885,
0x3fe07451, 0x3f502c36, 0x0661d483,
0x00009055, 0x3f401831, 0x0601ec81,
0x0030a85b, 0x3f300c2a, 0x05b1f480,
0x0070c061, 0x3f300024, 0x0562047a,
0x00b0d867, 0x3f3ff41e, 0x05020c77,
0x00f0f46b, 0x3f2fec19, 0x04a21474 },
},
{ 0x3c00, {
0x3fb05c43, 0x3fb05c43, 0x06c1b07e,
0x3fe06c4b, 0x3f902c3f, 0x0681c081,
0x0000844f, 0x3f703838, 0x0631cc7d,
0x00309855, 0x3f602433, 0x05d1d47e,
0x0060b459, 0x3f50142e, 0x0581e47b,
0x00a0c85f, 0x3f400828, 0x0531f078,
0x00e0e064, 0x3f300021, 0x0501fc73,
0x00b0fc6a, 0x3f3ff41d, 0x04a20873 },
},
{ 0x3e00, {
0x3fe06444, 0x3fe06444, 0x0681a07a,
0x00007849, 0x3fc0503f, 0x0641b07a,
0x0020904d, 0x3fa0403a, 0x05f1c07a,
0x0060a453, 0x3f803034, 0x05c1c878,
0x0090b858, 0x3f70202f, 0x0571d477,
0x00d0d05d, 0x3f501829, 0x0531e073,
0x0110e462, 0x3f500825, 0x04e1e471,
0x01510065, 0x3f40001f, 0x04a1f06d },
},
{ 0x4000, {
0x00007044, 0x00007044, 0x06519476,
0x00208448, 0x3fe05c3f, 0x0621a476,
0x0050984d, 0x3fc04c3a, 0x05e1b075,
0x0080ac52, 0x3fa03c35, 0x05a1b875,
0x00c0c056, 0x3f803030, 0x0561c473,
0x0100d45b, 0x3f70202b, 0x0521d46f,
0x0140e860, 0x3f601427, 0x04d1d46e,
0x01810064, 0x3f500822, 0x0491dc6b },
},
{ 0x5000, {
0x0110a442, 0x0110a442, 0x0551545e,
0x0140b045, 0x00e0983f, 0x0531585f,
0x0160c047, 0x00c08c3c, 0x0511645e,
0x0190cc4a, 0x00908039, 0x04f1685f,
0x01c0dc4c, 0x00707436, 0x04d1705e,
0x0200e850, 0x00506833, 0x04b1785b,
0x0230f453, 0x00305c30, 0x0491805a,
0x02710056, 0x0010542d, 0x04718059 },
},
{ 0x6000, {
0x01c0bc40, 0x01c0bc40, 0x04c13052,
0x01e0c841, 0x01a0b43d, 0x04c13851,
0x0210cc44, 0x0180a83c, 0x04a13453,
0x0230d845, 0x0160a03a, 0x04913c52,
0x0260e047, 0x01409838, 0x04714052,
0x0280ec49, 0x01208c37, 0x04514c50,
0x02b0f44b, 0x01008435, 0x04414c50,
0x02d1004c, 0x00e07c33, 0x0431544f },
},
{ 0x7000, {
0x0230c83e, 0x0230c83e, 0x04711c4c,
0x0250d03f, 0x0210c43c, 0x0471204b,
0x0270d840, 0x0200b83c, 0x0451244b,
0x0290dc42, 0x01e0b43a, 0x0441244c,
0x02b0e443, 0x01c0b038, 0x0441284b,
0x02d0ec44, 0x01b0a438, 0x0421304a,
0x02f0f445, 0x0190a036, 0x04213449,
0x0310f847, 0x01709c34, 0x04213848 },
},
{ 0x8000, {
0x0280d03d, 0x0280d03d, 0x04310c48,
0x02a0d43e, 0x0270c83c, 0x04311047,
0x02b0dc3e, 0x0250c83a, 0x04311447,
0x02d0e040, 0x0240c03a, 0x04211446,
0x02e0e840, 0x0220bc39, 0x04111847,
0x0300e842, 0x0210b438, 0x04012445,
0x0310f043, 0x0200b037, 0x04012045,
0x0330f444, 0x01e0ac36, 0x03f12445 },
},
{ 0xefff, {
0x0340dc3a, 0x0340dc3a, 0x03b0ec40,
0x0340e03a, 0x0330e039, 0x03c0f03e,
0x0350e03b, 0x0330dc39, 0x03c0ec3e,
0x0350e43a, 0x0320dc38, 0x03c0f43e,
0x0360e43b, 0x0320d839, 0x03b0f03e,
0x0360e83b, 0x0310d838, 0x03c0fc3b,
0x0370e83b, 0x0310d439, 0x03a0f83d,
0x0370e83c, 0x0300d438, 0x03b0fc3c },
}
};
static void rvin_set_coeff(struct rvin_dev *vin, unsigned short xs)
{
int i;
const struct vin_coeff *p_prev_set = NULL;
const struct vin_coeff *p_set = NULL;
/* Look for suitable coefficient values */
for (i = 0; i < ARRAY_SIZE(vin_coeff_set); i++) {
p_prev_set = p_set;
p_set = &vin_coeff_set[i];
if (xs < p_set->xs_value)
break;
}
/* Use previous value if its XS value is closer */
if (p_prev_set && p_set &&
xs - p_prev_set->xs_value < p_set->xs_value - xs)
p_set = p_prev_set;
/* Set coefficient registers */
rvin_write(vin, p_set->coeff_set[0], VNC1A_REG);
rvin_write(vin, p_set->coeff_set[1], VNC1B_REG);
rvin_write(vin, p_set->coeff_set[2], VNC1C_REG);
rvin_write(vin, p_set->coeff_set[3], VNC2A_REG);
rvin_write(vin, p_set->coeff_set[4], VNC2B_REG);
rvin_write(vin, p_set->coeff_set[5], VNC2C_REG);
rvin_write(vin, p_set->coeff_set[6], VNC3A_REG);
rvin_write(vin, p_set->coeff_set[7], VNC3B_REG);
rvin_write(vin, p_set->coeff_set[8], VNC3C_REG);
rvin_write(vin, p_set->coeff_set[9], VNC4A_REG);
rvin_write(vin, p_set->coeff_set[10], VNC4B_REG);
rvin_write(vin, p_set->coeff_set[11], VNC4C_REG);
rvin_write(vin, p_set->coeff_set[12], VNC5A_REG);
rvin_write(vin, p_set->coeff_set[13], VNC5B_REG);
rvin_write(vin, p_set->coeff_set[14], VNC5C_REG);
rvin_write(vin, p_set->coeff_set[15], VNC6A_REG);
rvin_write(vin, p_set->coeff_set[16], VNC6B_REG);
rvin_write(vin, p_set->coeff_set[17], VNC6C_REG);
rvin_write(vin, p_set->coeff_set[18], VNC7A_REG);
rvin_write(vin, p_set->coeff_set[19], VNC7B_REG);
rvin_write(vin, p_set->coeff_set[20], VNC7C_REG);
rvin_write(vin, p_set->coeff_set[21], VNC8A_REG);
rvin_write(vin, p_set->coeff_set[22], VNC8B_REG);
rvin_write(vin, p_set->coeff_set[23], VNC8C_REG);
}
void rvin_crop_scale_comp(struct rvin_dev *vin)
{
u32 xs, ys;
/* Set Start/End Pixel/Line Pre-Clip */
rvin_write(vin, vin->crop.left, VNSPPRC_REG);
rvin_write(vin, vin->crop.left + vin->crop.width - 1, VNEPPRC_REG);
switch (vin->format.field) {
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
rvin_write(vin, vin->crop.top / 2, VNSLPRC_REG);
rvin_write(vin, (vin->crop.top + vin->crop.height) / 2 - 1,
VNELPRC_REG);
break;
default:
rvin_write(vin, vin->crop.top, VNSLPRC_REG);
rvin_write(vin, vin->crop.top + vin->crop.height - 1,
VNELPRC_REG);
break;
}
/* Set scaling coefficient */
ys = 0;
if (vin->crop.height != vin->compose.height)
ys = (4096 * vin->crop.height) / vin->compose.height;
rvin_write(vin, ys, VNYS_REG);
xs = 0;
if (vin->crop.width != vin->compose.width)
xs = (4096 * vin->crop.width) / vin->compose.width;
/* Horizontal upscaling is up to double size */
if (xs > 0 && xs < 2048)
xs = 2048;
rvin_write(vin, xs, VNXS_REG);
/* Horizontal upscaling is done out by scaling down from double size */
if (xs < 4096)
xs *= 2;
rvin_set_coeff(vin, xs);
/* Set Start/End Pixel/Line Post-Clip */
rvin_write(vin, 0, VNSPPOC_REG);
rvin_write(vin, 0, VNSLPOC_REG);
rvin_write(vin, vin->format.width - 1, VNEPPOC_REG);
switch (vin->format.field) {
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
rvin_write(vin, vin->format.height / 2 - 1, VNELPOC_REG);
break;
default:
rvin_write(vin, vin->format.height - 1, VNELPOC_REG);
break;
}
if (vin->format.pixelformat == V4L2_PIX_FMT_NV16)
rvin_write(vin, ALIGN(vin->format.width, 0x20), VNIS_REG);
else
rvin_write(vin, ALIGN(vin->format.width, 0x10), VNIS_REG);
vin_dbg(vin,
"Pre-Clip: %ux%u@%u:%u YS: %d XS: %d Post-Clip: %ux%u@%u:%u\n",
vin->crop.width, vin->crop.height, vin->crop.left,
vin->crop.top, ys, xs, vin->format.width, vin->format.height,
0, 0);
}
void rvin_scale_try(struct rvin_dev *vin, struct v4l2_pix_format *pix,
u32 width, u32 height)
{
/* All VIN channels on Gen2 have scalers */
pix->width = width;
pix->height = height;
}
/* -----------------------------------------------------------------------------
* DMA Functions
*/
#define RVIN_TIMEOUT_MS 100
#define RVIN_RETRIES 10
struct rvin_buffer {
struct vb2_v4l2_buffer vb;
struct list_head list;
};
#define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \
struct rvin_buffer, \
vb)->list)
/* Moves a buffer from the queue to the HW slots */
static bool rvin_fill_hw_slot(struct rvin_dev *vin, int slot)
{
struct rvin_buffer *buf;
struct vb2_v4l2_buffer *vbuf;
dma_addr_t phys_addr_top;
if (vin->queue_buf[slot] != NULL)
return true;
if (list_empty(&vin->buf_list))
return false;
vin_dbg(vin, "Filling HW slot: %d\n", slot);
/* Keep track of buffer we give to HW */
buf = list_entry(vin->buf_list.next, struct rvin_buffer, list);
vbuf = &buf->vb;
list_del_init(to_buf_list(vbuf));
vin->queue_buf[slot] = vbuf;
/* Setup DMA */
phys_addr_top = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
rvin_set_slot_addr(vin, slot, phys_addr_top);
return true;
}
static bool rvin_fill_hw(struct rvin_dev *vin)
{
int slot, limit;
limit = vin->continuous ? HW_BUFFER_NUM : 1;
for (slot = 0; slot < limit; slot++)
if (!rvin_fill_hw_slot(vin, slot))
return false;
return true;
}
static irqreturn_t rvin_irq(int irq, void *data)
{
struct rvin_dev *vin = data;
u32 int_status, vnms;
int slot;
unsigned int sequence, handled = 0;
unsigned long flags;
spin_lock_irqsave(&vin->qlock, flags);
int_status = rvin_get_interrupt_status(vin);
if (!int_status)
goto done;
rvin_ack_interrupt(vin);
handled = 1;
/* Nothing to do if capture status is 'STOPPED' */
if (vin->state == STOPPED) {
vin_dbg(vin, "IRQ while state stopped\n");
goto done;
}
/* Nothing to do if capture status is 'STOPPING' */
if (vin->state == STOPPING) {
vin_dbg(vin, "IRQ while state stopping\n");
goto done;
}
/* Prepare for capture and update state */
vnms = rvin_read(vin, VNMS_REG);
slot = rvin_get_active_slot(vin, vnms);
sequence = vin->sequence++;
vin_dbg(vin, "IRQ %02d: %d\tbuf0: %c buf1: %c buf2: %c\tmore: %d\n",
sequence, slot,
slot == 0 ? 'x' : vin->queue_buf[0] != NULL ? '1' : '0',
slot == 1 ? 'x' : vin->queue_buf[1] != NULL ? '1' : '0',
slot == 2 ? 'x' : vin->queue_buf[2] != NULL ? '1' : '0',
!list_empty(&vin->buf_list));
/* HW have written to a slot that is not prepared we are in trouble */
if (WARN_ON((vin->queue_buf[slot] == NULL)))
goto done;
/* Capture frame */
vin->queue_buf[slot]->field = rvin_get_active_field(vin, vnms);
vin->queue_buf[slot]->sequence = sequence;
vin->queue_buf[slot]->vb2_buf.timestamp = ktime_get_ns();
vb2_buffer_done(&vin->queue_buf[slot]->vb2_buf, VB2_BUF_STATE_DONE);
vin->queue_buf[slot] = NULL;
/* Prepare for next frame */
if (!rvin_fill_hw(vin)) {
/*
* Can't supply HW with new buffers fast enough. Halt
* capture until more buffers are available.
*/
vin->state = STALLED;
/*
* The continuous capturing requires an explicit stop
* operation when there is no buffer to be set into
* the VnMBm registers.
*/
if (vin->continuous) {
rvin_capture_off(vin);
vin_dbg(vin, "IRQ %02d: hw not ready stop\n", sequence);
}
} else {
/*
* The single capturing requires an explicit capture
* operation to fetch the next frame.
*/
if (!vin->continuous)
rvin_capture_on(vin);
}
done:
spin_unlock_irqrestore(&vin->qlock, flags);
return IRQ_RETVAL(handled);
}
/* Need to hold qlock before calling */
static void return_all_buffers(struct rvin_dev *vin,
enum vb2_buffer_state state)
{
struct rvin_buffer *buf, *node;
int i;
for (i = 0; i < HW_BUFFER_NUM; i++) {
if (vin->queue_buf[i]) {
vb2_buffer_done(&vin->queue_buf[i]->vb2_buf,
state);
vin->queue_buf[i] = NULL;
}
}
list_for_each_entry_safe(buf, node, &vin->buf_list, list) {
vb2_buffer_done(&buf->vb.vb2_buf, state);
list_del(&buf->list);
}
}
static int rvin_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[],
struct device *alloc_devs[])
{
struct rvin_dev *vin = vb2_get_drv_priv(vq);
/* Make sure the image size is large enough. */
if (*nplanes)
return sizes[0] < vin->format.sizeimage ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = vin->format.sizeimage;
return 0;
};
static int rvin_buffer_prepare(struct vb2_buffer *vb)
{
struct rvin_dev *vin = vb2_get_drv_priv(vb->vb2_queue);
unsigned long size = vin->format.sizeimage;
if (vb2_plane_size(vb, 0) < size) {
vin_err(vin, "buffer too small (%lu < %lu)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, size);
return 0;
}
static void rvin_buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct rvin_dev *vin = vb2_get_drv_priv(vb->vb2_queue);
unsigned long flags;
spin_lock_irqsave(&vin->qlock, flags);
list_add_tail(to_buf_list(vbuf), &vin->buf_list);
/*
* If capture is stalled add buffer to HW and restart
* capturing if HW is ready to continue.
*/
if (vin->state == STALLED)
if (rvin_fill_hw(vin))
rvin_capture_on(vin);
spin_unlock_irqrestore(&vin->qlock, flags);
}
static int rvin_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct rvin_dev *vin = vb2_get_drv_priv(vq);
struct v4l2_subdev *sd;
unsigned long flags;
int ret;
sd = vin_to_source(vin);
v4l2_subdev_call(sd, video, s_stream, 1);
spin_lock_irqsave(&vin->qlock, flags);
vin->state = RUNNING;
vin->sequence = 0;
/* Continuous capture requires more buffers then there are HW slots */
vin->continuous = count > HW_BUFFER_NUM;
/*
* This should never happen but if we don't have enough
* buffers for HW bail out
*/
if (!rvin_fill_hw(vin)) {
vin_err(vin, "HW not ready to start, not enough buffers available\n");
ret = -EINVAL;
goto out;
}
ret = rvin_capture_start(vin);
out:
/* Return all buffers if something went wrong */
if (ret) {
return_all_buffers(vin, VB2_BUF_STATE_QUEUED);
v4l2_subdev_call(sd, video, s_stream, 0);
}
spin_unlock_irqrestore(&vin->qlock, flags);
return ret;
}
static void rvin_stop_streaming(struct vb2_queue *vq)
{
struct rvin_dev *vin = vb2_get_drv_priv(vq);
struct v4l2_subdev *sd;
unsigned long flags;
int retries = 0;
spin_lock_irqsave(&vin->qlock, flags);
vin->state = STOPPING;
/* Wait for streaming to stop */
while (retries++ < RVIN_RETRIES) {
rvin_capture_stop(vin);
/* Check if HW is stopped */
if (!rvin_capture_active(vin)) {
vin->state = STOPPED;
break;
}
spin_unlock_irqrestore(&vin->qlock, flags);
msleep(RVIN_TIMEOUT_MS);
spin_lock_irqsave(&vin->qlock, flags);
}
if (vin->state != STOPPED) {
/*
* If this happens something have gone horribly wrong.
* Set state to stopped to prevent the interrupt handler
* to make things worse...
*/
vin_err(vin, "Failed stop HW, something is seriously broken\n");
vin->state = STOPPED;
}
/* Release all active buffers */
return_all_buffers(vin, VB2_BUF_STATE_ERROR);
spin_unlock_irqrestore(&vin->qlock, flags);
sd = vin_to_source(vin);
v4l2_subdev_call(sd, video, s_stream, 0);
/* disable interrupts */
rvin_disable_interrupts(vin);
}
static const struct vb2_ops rvin_qops = {
.queue_setup = rvin_queue_setup,
.buf_prepare = rvin_buffer_prepare,
.buf_queue = rvin_buffer_queue,
.start_streaming = rvin_start_streaming,
.stop_streaming = rvin_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
void rvin_dma_remove(struct rvin_dev *vin)
{
mutex_destroy(&vin->lock);
v4l2_device_unregister(&vin->v4l2_dev);
}
int rvin_dma_probe(struct rvin_dev *vin, int irq)
{
struct vb2_queue *q = &vin->queue;
int i, ret;
/* Initialize the top-level structure */
ret = v4l2_device_register(vin->dev, &vin->v4l2_dev);
if (ret)
return ret;
mutex_init(&vin->lock);
INIT_LIST_HEAD(&vin->buf_list);
spin_lock_init(&vin->qlock);
vin->state = STOPPED;
for (i = 0; i < HW_BUFFER_NUM; i++)
vin->queue_buf[i] = NULL;
/* buffer queue */
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
q->lock = &vin->lock;
q->drv_priv = vin;
q->buf_struct_size = sizeof(struct rvin_buffer);
q->ops = &rvin_qops;
q->mem_ops = &vb2_dma_contig_memops;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->min_buffers_needed = 2;
q->dev = vin->dev;
ret = vb2_queue_init(q);
if (ret < 0) {
vin_err(vin, "failed to initialize VB2 queue\n");
goto error;
}
/* irq */
ret = devm_request_irq(vin->dev, irq, rvin_irq, IRQF_SHARED,
KBUILD_MODNAME, vin);
if (ret) {
vin_err(vin, "failed to request irq\n");
goto error;
}
return 0;
error:
rvin_dma_remove(vin);
return ret;
}
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