// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Microchip Image Sensor Controller (ISC) common driver base
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*
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* Copyright (C) 2016-2019 Microchip Technology, Inc.
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*
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* Author: Songjun Wu
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* Author: Eugen Hristev <eugen.hristev@microchip.com>
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*
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*/
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <linux/clk-provider.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/math64.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_graph.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/videodev2.h>
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#include <linux/atmel-isc-media.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-event.h>
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#include <media/v4l2-image-sizes.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-fwnode.h>
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#include <media/v4l2-subdev.h>
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#include <media/videobuf2-dma-contig.h>
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#include "atmel-isc-regs.h"
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#include "atmel-isc.h"
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static unsigned int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "debug level (0-2)");
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static unsigned int sensor_preferred = 1;
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module_param(sensor_preferred, uint, 0644);
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MODULE_PARM_DESC(sensor_preferred,
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"Sensor is preferred to output the specified format (1-on 0-off), default 1");
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/* This is a list of the formats that the ISC can *output* */
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const struct isc_format controller_formats[] = {
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{
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.fourcc = V4L2_PIX_FMT_ARGB444,
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},
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{
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.fourcc = V4L2_PIX_FMT_ARGB555,
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},
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{
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.fourcc = V4L2_PIX_FMT_RGB565,
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},
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{
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.fourcc = V4L2_PIX_FMT_ABGR32,
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},
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{
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.fourcc = V4L2_PIX_FMT_XBGR32,
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},
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{
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.fourcc = V4L2_PIX_FMT_YUV420,
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},
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{
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.fourcc = V4L2_PIX_FMT_YUYV,
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},
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{
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.fourcc = V4L2_PIX_FMT_YUV422P,
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},
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{
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.fourcc = V4L2_PIX_FMT_GREY,
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},
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{
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.fourcc = V4L2_PIX_FMT_Y10,
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},
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};
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/* This is a list of formats that the ISC can receive as *input* */
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struct isc_format formats_list[] = {
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{
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.fourcc = V4L2_PIX_FMT_SBGGR8,
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.mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
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.pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
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.cfa_baycfg = ISC_BAY_CFG_BGBG,
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},
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{
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.fourcc = V4L2_PIX_FMT_SGBRG8,
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.mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8,
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.pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
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.cfa_baycfg = ISC_BAY_CFG_GBGB,
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},
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{
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.fourcc = V4L2_PIX_FMT_SGRBG8,
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.mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
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.pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
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.cfa_baycfg = ISC_BAY_CFG_GRGR,
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},
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{
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.fourcc = V4L2_PIX_FMT_SRGGB8,
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.mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8,
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.pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
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.cfa_baycfg = ISC_BAY_CFG_RGRG,
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},
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{
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.fourcc = V4L2_PIX_FMT_SBGGR10,
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.mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
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.cfa_baycfg = ISC_BAY_CFG_RGRG,
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},
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{
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.fourcc = V4L2_PIX_FMT_SGBRG10,
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.mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
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.cfa_baycfg = ISC_BAY_CFG_GBGB,
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},
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{
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.fourcc = V4L2_PIX_FMT_SGRBG10,
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.mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
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.cfa_baycfg = ISC_BAY_CFG_GRGR,
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},
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{
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.fourcc = V4L2_PIX_FMT_SRGGB10,
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.mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
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.cfa_baycfg = ISC_BAY_CFG_RGRG,
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},
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{
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.fourcc = V4L2_PIX_FMT_SBGGR12,
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.mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
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.cfa_baycfg = ISC_BAY_CFG_BGBG,
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},
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{
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.fourcc = V4L2_PIX_FMT_SGBRG12,
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.mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
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.cfa_baycfg = ISC_BAY_CFG_GBGB,
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},
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{
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.fourcc = V4L2_PIX_FMT_SGRBG12,
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.mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
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.cfa_baycfg = ISC_BAY_CFG_GRGR,
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},
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{
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.fourcc = V4L2_PIX_FMT_SRGGB12,
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.mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
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.cfa_baycfg = ISC_BAY_CFG_RGRG,
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},
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{
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.fourcc = V4L2_PIX_FMT_GREY,
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.mbus_code = MEDIA_BUS_FMT_Y8_1X8,
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.pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
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},
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{
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.fourcc = V4L2_PIX_FMT_YUYV,
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.mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
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.pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
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},
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{
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.fourcc = V4L2_PIX_FMT_RGB565,
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.mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
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.pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
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},
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{
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.fourcc = V4L2_PIX_FMT_Y10,
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.mbus_code = MEDIA_BUS_FMT_Y10_1X10,
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.pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
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},
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};
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/* Gamma table with gamma 1/2.2 */
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const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES] = {
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/* 0 --> gamma 1/1.8 */
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{ 0x65, 0x66002F, 0x950025, 0xBB0020, 0xDB001D, 0xF8001A,
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0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012,
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0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F,
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0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E,
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0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C,
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0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B,
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0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A,
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0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A,
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0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A,
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0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009,
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0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 },
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/* 1 --> gamma 1/2 */
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{ 0x7F, 0x800034, 0xB50028, 0xDE0021, 0x100001E, 0x11E001B,
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0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013,
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0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F,
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0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D,
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0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B,
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0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A,
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0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A,
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0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009,
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0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009,
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0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009,
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0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 },
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/* 2 --> gamma 1/2.2 */
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{ 0x99, 0x9B0038, 0xD4002A, 0xFF0023, 0x122001F, 0x141001B,
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0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012,
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0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F,
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0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C,
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0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B,
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0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A,
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0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009,
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0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009,
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0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008,
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0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007,
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0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 },
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};
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#define ISC_IS_FORMAT_RAW(mbus_code) \
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(((mbus_code) & 0xf000) == 0x3000)
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#define ISC_IS_FORMAT_GREY(mbus_code) \
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(((mbus_code) == MEDIA_BUS_FMT_Y10_1X10) | \
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(((mbus_code) == MEDIA_BUS_FMT_Y8_1X8)))
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static inline void isc_update_v4l2_ctrls(struct isc_device *isc)
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{
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struct isc_ctrls *ctrls = &isc->ctrls;
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/* In here we set the v4l2 controls w.r.t. our pipeline config */
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v4l2_ctrl_s_ctrl(isc->r_gain_ctrl, ctrls->gain[ISC_HIS_CFG_MODE_R]);
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v4l2_ctrl_s_ctrl(isc->b_gain_ctrl, ctrls->gain[ISC_HIS_CFG_MODE_B]);
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v4l2_ctrl_s_ctrl(isc->gr_gain_ctrl, ctrls->gain[ISC_HIS_CFG_MODE_GR]);
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v4l2_ctrl_s_ctrl(isc->gb_gain_ctrl, ctrls->gain[ISC_HIS_CFG_MODE_GB]);
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v4l2_ctrl_s_ctrl(isc->r_off_ctrl, ctrls->offset[ISC_HIS_CFG_MODE_R]);
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v4l2_ctrl_s_ctrl(isc->b_off_ctrl, ctrls->offset[ISC_HIS_CFG_MODE_B]);
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v4l2_ctrl_s_ctrl(isc->gr_off_ctrl, ctrls->offset[ISC_HIS_CFG_MODE_GR]);
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v4l2_ctrl_s_ctrl(isc->gb_off_ctrl, ctrls->offset[ISC_HIS_CFG_MODE_GB]);
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}
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static inline void isc_update_awb_ctrls(struct isc_device *isc)
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{
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struct isc_ctrls *ctrls = &isc->ctrls;
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/* In here we set our actual hw pipeline config */
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regmap_write(isc->regmap, ISC_WB_O_RGR,
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((ctrls->offset[ISC_HIS_CFG_MODE_R])) |
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((ctrls->offset[ISC_HIS_CFG_MODE_GR]) << 16));
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regmap_write(isc->regmap, ISC_WB_O_BGB,
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((ctrls->offset[ISC_HIS_CFG_MODE_B])) |
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((ctrls->offset[ISC_HIS_CFG_MODE_GB]) << 16));
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regmap_write(isc->regmap, ISC_WB_G_RGR,
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ctrls->gain[ISC_HIS_CFG_MODE_R] |
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(ctrls->gain[ISC_HIS_CFG_MODE_GR] << 16));
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regmap_write(isc->regmap, ISC_WB_G_BGB,
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ctrls->gain[ISC_HIS_CFG_MODE_B] |
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(ctrls->gain[ISC_HIS_CFG_MODE_GB] << 16));
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}
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static inline void isc_reset_awb_ctrls(struct isc_device *isc)
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{
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unsigned int c;
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for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) {
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/* gains have a fixed point at 9 decimals */
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isc->ctrls.gain[c] = 1 << 9;
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/* offsets are in 2's complements */
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isc->ctrls.offset[c] = 0;
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}
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}
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static int isc_wait_clk_stable(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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struct regmap *regmap = isc_clk->regmap;
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unsigned long timeout = jiffies + usecs_to_jiffies(1000);
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unsigned int status;
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while (time_before(jiffies, timeout)) {
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regmap_read(regmap, ISC_CLKSR, &status);
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if (!(status & ISC_CLKSR_SIP))
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return 0;
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usleep_range(10, 250);
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}
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return -ETIMEDOUT;
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}
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static int isc_clk_prepare(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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if (isc_clk->id == ISC_ISPCK)
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pm_runtime_get_sync(isc_clk->dev);
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return isc_wait_clk_stable(hw);
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}
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static void isc_clk_unprepare(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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isc_wait_clk_stable(hw);
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if (isc_clk->id == ISC_ISPCK)
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pm_runtime_put_sync(isc_clk->dev);
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}
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static int isc_clk_enable(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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u32 id = isc_clk->id;
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struct regmap *regmap = isc_clk->regmap;
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unsigned long flags;
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unsigned int status;
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dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n",
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__func__, isc_clk->div, isc_clk->parent_id);
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spin_lock_irqsave(&isc_clk->lock, flags);
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regmap_update_bits(regmap, ISC_CLKCFG,
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ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id),
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(isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) |
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(isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id)));
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regmap_write(regmap, ISC_CLKEN, ISC_CLK(id));
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spin_unlock_irqrestore(&isc_clk->lock, flags);
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regmap_read(regmap, ISC_CLKSR, &status);
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if (status & ISC_CLK(id))
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return 0;
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else
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return -EINVAL;
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}
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static void isc_clk_disable(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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u32 id = isc_clk->id;
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unsigned long flags;
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spin_lock_irqsave(&isc_clk->lock, flags);
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regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id));
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spin_unlock_irqrestore(&isc_clk->lock, flags);
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}
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static int isc_clk_is_enabled(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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u32 status;
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if (isc_clk->id == ISC_ISPCK)
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pm_runtime_get_sync(isc_clk->dev);
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regmap_read(isc_clk->regmap, ISC_CLKSR, &status);
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if (isc_clk->id == ISC_ISPCK)
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pm_runtime_put_sync(isc_clk->dev);
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return status & ISC_CLK(isc_clk->id) ? 1 : 0;
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}
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static unsigned long
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isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
|
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return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1);
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}
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static int isc_clk_determine_rate(struct clk_hw *hw,
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struct clk_rate_request *req)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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long best_rate = -EINVAL;
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int best_diff = -1;
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unsigned int i, div;
|
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for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
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struct clk_hw *parent;
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unsigned long parent_rate;
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parent = clk_hw_get_parent_by_index(hw, i);
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if (!parent)
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continue;
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parent_rate = clk_hw_get_rate(parent);
|
if (!parent_rate)
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continue;
|
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for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) {
|
unsigned long rate;
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int diff;
|
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rate = DIV_ROUND_CLOSEST(parent_rate, div);
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diff = abs(req->rate - rate);
|
|
if (best_diff < 0 || best_diff > diff) {
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best_rate = rate;
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best_diff = diff;
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req->best_parent_rate = parent_rate;
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req->best_parent_hw = parent;
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}
|
|
if (!best_diff || rate < req->rate)
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break;
|
}
|
|
if (!best_diff)
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break;
|
}
|
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dev_dbg(isc_clk->dev,
|
"ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n",
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__func__, best_rate,
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__clk_get_name((req->best_parent_hw)->clk),
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req->best_parent_rate);
|
|
if (best_rate < 0)
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return best_rate;
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req->rate = best_rate;
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|
return 0;
|
}
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static int isc_clk_set_parent(struct clk_hw *hw, u8 index)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
|
|
if (index >= clk_hw_get_num_parents(hw))
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return -EINVAL;
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isc_clk->parent_id = index;
|
|
return 0;
|
}
|
|
static u8 isc_clk_get_parent(struct clk_hw *hw)
|
{
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struct isc_clk *isc_clk = to_isc_clk(hw);
|
|
return isc_clk->parent_id;
|
}
|
|
static int isc_clk_set_rate(struct clk_hw *hw,
|
unsigned long rate,
|
unsigned long parent_rate)
|
{
|
struct isc_clk *isc_clk = to_isc_clk(hw);
|
u32 div;
|
|
if (!rate)
|
return -EINVAL;
|
|
div = DIV_ROUND_CLOSEST(parent_rate, rate);
|
if (div > (ISC_CLK_MAX_DIV + 1) || !div)
|
return -EINVAL;
|
|
isc_clk->div = div - 1;
|
|
return 0;
|
}
|
|
static const struct clk_ops isc_clk_ops = {
|
.prepare = isc_clk_prepare,
|
.unprepare = isc_clk_unprepare,
|
.enable = isc_clk_enable,
|
.disable = isc_clk_disable,
|
.is_enabled = isc_clk_is_enabled,
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.recalc_rate = isc_clk_recalc_rate,
|
.determine_rate = isc_clk_determine_rate,
|
.set_parent = isc_clk_set_parent,
|
.get_parent = isc_clk_get_parent,
|
.set_rate = isc_clk_set_rate,
|
};
|
|
static int isc_clk_register(struct isc_device *isc, unsigned int id)
|
{
|
struct regmap *regmap = isc->regmap;
|
struct device_node *np = isc->dev->of_node;
|
struct isc_clk *isc_clk;
|
struct clk_init_data init;
|
const char *clk_name = np->name;
|
const char *parent_names[3];
|
int num_parents;
|
|
num_parents = of_clk_get_parent_count(np);
|
if (num_parents < 1 || num_parents > 3)
|
return -EINVAL;
|
|
if (num_parents > 2 && id == ISC_ISPCK)
|
num_parents = 2;
|
|
of_clk_parent_fill(np, parent_names, num_parents);
|
|
if (id == ISC_MCK)
|
of_property_read_string(np, "clock-output-names", &clk_name);
|
else
|
clk_name = "isc-ispck";
|
|
init.parent_names = parent_names;
|
init.num_parents = num_parents;
|
init.name = clk_name;
|
init.ops = &isc_clk_ops;
|
init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
|
|
isc_clk = &isc->isc_clks[id];
|
isc_clk->hw.init = &init;
|
isc_clk->regmap = regmap;
|
isc_clk->id = id;
|
isc_clk->dev = isc->dev;
|
spin_lock_init(&isc_clk->lock);
|
|
isc_clk->clk = clk_register(isc->dev, &isc_clk->hw);
|
if (IS_ERR(isc_clk->clk)) {
|
dev_err(isc->dev, "%s: clock register fail\n", clk_name);
|
return PTR_ERR(isc_clk->clk);
|
} else if (id == ISC_MCK)
|
of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk);
|
|
return 0;
|
}
|
|
int isc_clk_init(struct isc_device *isc)
|
{
|
unsigned int i;
|
int ret;
|
|
for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++)
|
isc->isc_clks[i].clk = ERR_PTR(-EINVAL);
|
|
for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
|
ret = isc_clk_register(isc, i);
|
if (ret)
|
return ret;
|
}
|
|
return 0;
|
}
|
|
void isc_clk_cleanup(struct isc_device *isc)
|
{
|
unsigned int i;
|
|
of_clk_del_provider(isc->dev->of_node);
|
|
for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
|
struct isc_clk *isc_clk = &isc->isc_clks[i];
|
|
if (!IS_ERR(isc_clk->clk))
|
clk_unregister(isc_clk->clk);
|
}
|
}
|
|
static int isc_queue_setup(struct vb2_queue *vq,
|
unsigned int *nbuffers, unsigned int *nplanes,
|
unsigned int sizes[], struct device *alloc_devs[])
|
{
|
struct isc_device *isc = vb2_get_drv_priv(vq);
|
unsigned int size = isc->fmt.fmt.pix.sizeimage;
|
|
if (*nplanes)
|
return sizes[0] < size ? -EINVAL : 0;
|
|
*nplanes = 1;
|
sizes[0] = size;
|
|
return 0;
|
}
|
|
static int isc_buffer_prepare(struct vb2_buffer *vb)
|
{
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
|
struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
|
unsigned long size = isc->fmt.fmt.pix.sizeimage;
|
|
if (vb2_plane_size(vb, 0) < size) {
|
v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n",
|
vb2_plane_size(vb, 0), size);
|
return -EINVAL;
|
}
|
|
vb2_set_plane_payload(vb, 0, size);
|
|
vbuf->field = isc->fmt.fmt.pix.field;
|
|
return 0;
|
}
|
|
static void isc_start_dma(struct isc_device *isc)
|
{
|
struct regmap *regmap = isc->regmap;
|
u32 sizeimage = isc->fmt.fmt.pix.sizeimage;
|
u32 dctrl_dview;
|
dma_addr_t addr0;
|
u32 h, w;
|
|
h = isc->fmt.fmt.pix.height;
|
w = isc->fmt.fmt.pix.width;
|
|
/*
|
* In case the sensor is not RAW, it will output a pixel (12-16 bits)
|
* with two samples on the ISC Data bus (which is 8-12)
|
* ISC will count each sample, so, we need to multiply these values
|
* by two, to get the real number of samples for the required pixels.
|
*/
|
if (!ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) {
|
h <<= 1;
|
w <<= 1;
|
}
|
|
/*
|
* We limit the column/row count that the ISC will output according
|
* to the configured resolution that we want.
|
* This will avoid the situation where the sensor is misconfigured,
|
* sending more data, and the ISC will just take it and DMA to memory,
|
* causing corruption.
|
*/
|
regmap_write(regmap, ISC_PFE_CFG1,
|
(ISC_PFE_CFG1_COLMIN(0) & ISC_PFE_CFG1_COLMIN_MASK) |
|
(ISC_PFE_CFG1_COLMAX(w - 1) & ISC_PFE_CFG1_COLMAX_MASK));
|
|
regmap_write(regmap, ISC_PFE_CFG2,
|
(ISC_PFE_CFG2_ROWMIN(0) & ISC_PFE_CFG2_ROWMIN_MASK) |
|
(ISC_PFE_CFG2_ROWMAX(h - 1) & ISC_PFE_CFG2_ROWMAX_MASK));
|
|
regmap_update_bits(regmap, ISC_PFE_CFG0,
|
ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN,
|
ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN);
|
|
addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0);
|
regmap_write(regmap, ISC_DAD0, addr0);
|
|
switch (isc->config.fourcc) {
|
case V4L2_PIX_FMT_YUV420:
|
regmap_write(regmap, ISC_DAD1, addr0 + (sizeimage * 2) / 3);
|
regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 5) / 6);
|
break;
|
case V4L2_PIX_FMT_YUV422P:
|
regmap_write(regmap, ISC_DAD1, addr0 + sizeimage / 2);
|
regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 3) / 4);
|
break;
|
default:
|
break;
|
}
|
|
dctrl_dview = isc->config.dctrl_dview;
|
|
regmap_write(regmap, ISC_DCTRL, dctrl_dview | ISC_DCTRL_IE_IS);
|
spin_lock(&isc->awb_lock);
|
regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE);
|
spin_unlock(&isc->awb_lock);
|
}
|
|
static void isc_set_pipeline(struct isc_device *isc, u32 pipeline)
|
{
|
struct regmap *regmap = isc->regmap;
|
struct isc_ctrls *ctrls = &isc->ctrls;
|
u32 val, bay_cfg;
|
const u32 *gamma;
|
unsigned int i;
|
|
/* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
|
for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
|
val = pipeline & BIT(i) ? 1 : 0;
|
regmap_field_write(isc->pipeline[i], val);
|
}
|
|
if (!pipeline)
|
return;
|
|
bay_cfg = isc->config.sd_format->cfa_baycfg;
|
|
regmap_write(regmap, ISC_WB_CFG, bay_cfg);
|
isc_update_awb_ctrls(isc);
|
isc_update_v4l2_ctrls(isc);
|
|
regmap_write(regmap, ISC_CFA_CFG, bay_cfg | ISC_CFA_CFG_EITPOL);
|
|
gamma = &isc_gamma_table[ctrls->gamma_index][0];
|
regmap_bulk_write(regmap, ISC_GAM_BENTRY, gamma, GAMMA_ENTRIES);
|
regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES);
|
regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES);
|
|
/* Convert RGB to YUV */
|
regmap_write(regmap, ISC_CSC_YR_YG, 0x42 | (0x81 << 16));
|
regmap_write(regmap, ISC_CSC_YB_OY, 0x19 | (0x10 << 16));
|
regmap_write(regmap, ISC_CSC_CBR_CBG, 0xFDA | (0xFB6 << 16));
|
regmap_write(regmap, ISC_CSC_CBB_OCB, 0x70 | (0x80 << 16));
|
regmap_write(regmap, ISC_CSC_CRR_CRG, 0x70 | (0xFA2 << 16));
|
regmap_write(regmap, ISC_CSC_CRB_OCR, 0xFEE | (0x80 << 16));
|
|
regmap_write(regmap, ISC_CBC_BRIGHT, ctrls->brightness);
|
regmap_write(regmap, ISC_CBC_CONTRAST, ctrls->contrast);
|
}
|
|
static int isc_update_profile(struct isc_device *isc)
|
{
|
struct regmap *regmap = isc->regmap;
|
u32 sr;
|
int counter = 100;
|
|
regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO);
|
|
regmap_read(regmap, ISC_CTRLSR, &sr);
|
while ((sr & ISC_CTRL_UPPRO) && counter--) {
|
usleep_range(1000, 2000);
|
regmap_read(regmap, ISC_CTRLSR, &sr);
|
}
|
|
if (counter < 0) {
|
v4l2_warn(&isc->v4l2_dev, "Time out to update profile\n");
|
return -ETIMEDOUT;
|
}
|
|
return 0;
|
}
|
|
static void isc_set_histogram(struct isc_device *isc, bool enable)
|
{
|
struct regmap *regmap = isc->regmap;
|
struct isc_ctrls *ctrls = &isc->ctrls;
|
|
if (enable) {
|
regmap_write(regmap, ISC_HIS_CFG,
|
ISC_HIS_CFG_MODE_GR |
|
(isc->config.sd_format->cfa_baycfg
|
<< ISC_HIS_CFG_BAYSEL_SHIFT) |
|
ISC_HIS_CFG_RAR);
|
regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_EN);
|
regmap_write(regmap, ISC_INTEN, ISC_INT_HISDONE);
|
ctrls->hist_id = ISC_HIS_CFG_MODE_GR;
|
isc_update_profile(isc);
|
regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
|
|
ctrls->hist_stat = HIST_ENABLED;
|
} else {
|
regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE);
|
regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_DIS);
|
|
ctrls->hist_stat = HIST_DISABLED;
|
}
|
}
|
|
static int isc_configure(struct isc_device *isc)
|
{
|
struct regmap *regmap = isc->regmap;
|
u32 pfe_cfg0, rlp_mode, dcfg, mask, pipeline;
|
struct isc_subdev_entity *subdev = isc->current_subdev;
|
|
pfe_cfg0 = isc->config.sd_format->pfe_cfg0_bps;
|
rlp_mode = isc->config.rlp_cfg_mode;
|
pipeline = isc->config.bits_pipeline;
|
|
dcfg = isc->config.dcfg_imode |
|
ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8;
|
|
pfe_cfg0 |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE;
|
mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW |
|
ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW |
|
ISC_PFE_CFG0_MODE_MASK | ISC_PFE_CFG0_CCIR_CRC |
|
ISC_PFE_CFG0_CCIR656;
|
|
regmap_update_bits(regmap, ISC_PFE_CFG0, mask, pfe_cfg0);
|
|
regmap_update_bits(regmap, ISC_RLP_CFG, ISC_RLP_CFG_MODE_MASK,
|
rlp_mode);
|
|
regmap_write(regmap, ISC_DCFG, dcfg);
|
|
/* Set the pipeline */
|
isc_set_pipeline(isc, pipeline);
|
|
/*
|
* The current implemented histogram is available for RAW R, B, GB, GR
|
* channels. We need to check if sensor is outputting RAW BAYER
|
*/
|
if (isc->ctrls.awb &&
|
ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
|
isc_set_histogram(isc, true);
|
else
|
isc_set_histogram(isc, false);
|
|
/* Update profile */
|
return isc_update_profile(isc);
|
}
|
|
static int isc_start_streaming(struct vb2_queue *vq, unsigned int count)
|
{
|
struct isc_device *isc = vb2_get_drv_priv(vq);
|
struct regmap *regmap = isc->regmap;
|
struct isc_buffer *buf;
|
unsigned long flags;
|
int ret;
|
|
/* Enable stream on the sub device */
|
ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1);
|
if (ret && ret != -ENOIOCTLCMD) {
|
v4l2_err(&isc->v4l2_dev, "stream on failed in subdev %d\n",
|
ret);
|
goto err_start_stream;
|
}
|
|
pm_runtime_get_sync(isc->dev);
|
|
ret = isc_configure(isc);
|
if (unlikely(ret))
|
goto err_configure;
|
|
/* Enable DMA interrupt */
|
regmap_write(regmap, ISC_INTEN, ISC_INT_DDONE);
|
|
spin_lock_irqsave(&isc->dma_queue_lock, flags);
|
|
isc->sequence = 0;
|
isc->stop = false;
|
reinit_completion(&isc->comp);
|
|
isc->cur_frm = list_first_entry(&isc->dma_queue,
|
struct isc_buffer, list);
|
list_del(&isc->cur_frm->list);
|
|
isc_start_dma(isc);
|
|
spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
|
|
/* if we streaming from RAW, we can do one-shot white balance adj */
|
if (ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
|
v4l2_ctrl_activate(isc->do_wb_ctrl, true);
|
|
return 0;
|
|
err_configure:
|
pm_runtime_put_sync(isc->dev);
|
|
v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
|
|
err_start_stream:
|
spin_lock_irqsave(&isc->dma_queue_lock, flags);
|
list_for_each_entry(buf, &isc->dma_queue, list)
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
|
INIT_LIST_HEAD(&isc->dma_queue);
|
spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
|
|
return ret;
|
}
|
|
static void isc_stop_streaming(struct vb2_queue *vq)
|
{
|
struct isc_device *isc = vb2_get_drv_priv(vq);
|
unsigned long flags;
|
struct isc_buffer *buf;
|
int ret;
|
|
v4l2_ctrl_activate(isc->do_wb_ctrl, false);
|
|
isc->stop = true;
|
|
/* Wait until the end of the current frame */
|
if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ))
|
v4l2_err(&isc->v4l2_dev,
|
"Timeout waiting for end of the capture\n");
|
|
/* Disable DMA interrupt */
|
regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE);
|
|
pm_runtime_put_sync(isc->dev);
|
|
/* Disable stream on the sub device */
|
ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
|
if (ret && ret != -ENOIOCTLCMD)
|
v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n");
|
|
/* Release all active buffers */
|
spin_lock_irqsave(&isc->dma_queue_lock, flags);
|
if (unlikely(isc->cur_frm)) {
|
vb2_buffer_done(&isc->cur_frm->vb.vb2_buf,
|
VB2_BUF_STATE_ERROR);
|
isc->cur_frm = NULL;
|
}
|
list_for_each_entry(buf, &isc->dma_queue, list)
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
|
INIT_LIST_HEAD(&isc->dma_queue);
|
spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
|
}
|
|
static void isc_buffer_queue(struct vb2_buffer *vb)
|
{
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
|
struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb);
|
struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
|
unsigned long flags;
|
|
spin_lock_irqsave(&isc->dma_queue_lock, flags);
|
if (!isc->cur_frm && list_empty(&isc->dma_queue) &&
|
vb2_is_streaming(vb->vb2_queue)) {
|
isc->cur_frm = buf;
|
isc_start_dma(isc);
|
} else
|
list_add_tail(&buf->list, &isc->dma_queue);
|
spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
|
}
|
|
static struct isc_format *find_format_by_fourcc(struct isc_device *isc,
|
unsigned int fourcc)
|
{
|
unsigned int num_formats = isc->num_user_formats;
|
struct isc_format *fmt;
|
unsigned int i;
|
|
for (i = 0; i < num_formats; i++) {
|
fmt = isc->user_formats[i];
|
if (fmt->fourcc == fourcc)
|
return fmt;
|
}
|
|
return NULL;
|
}
|
|
static const struct vb2_ops isc_vb2_ops = {
|
.queue_setup = isc_queue_setup,
|
.wait_prepare = vb2_ops_wait_prepare,
|
.wait_finish = vb2_ops_wait_finish,
|
.buf_prepare = isc_buffer_prepare,
|
.start_streaming = isc_start_streaming,
|
.stop_streaming = isc_stop_streaming,
|
.buf_queue = isc_buffer_queue,
|
};
|
|
static int isc_querycap(struct file *file, void *priv,
|
struct v4l2_capability *cap)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
|
strscpy(cap->driver, ATMEL_ISC_NAME, sizeof(cap->driver));
|
strscpy(cap->card, "Atmel Image Sensor Controller", sizeof(cap->card));
|
snprintf(cap->bus_info, sizeof(cap->bus_info),
|
"platform:%s", isc->v4l2_dev.name);
|
|
return 0;
|
}
|
|
static int isc_enum_fmt_vid_cap(struct file *file, void *priv,
|
struct v4l2_fmtdesc *f)
|
{
|
u32 index = f->index;
|
u32 i, supported_index;
|
|
if (index < ARRAY_SIZE(controller_formats)) {
|
f->pixelformat = controller_formats[index].fourcc;
|
return 0;
|
}
|
|
index -= ARRAY_SIZE(controller_formats);
|
|
i = 0;
|
supported_index = 0;
|
|
for (i = 0; i < ARRAY_SIZE(formats_list); i++) {
|
if (!ISC_IS_FORMAT_RAW(formats_list[i].mbus_code) ||
|
!formats_list[i].sd_support)
|
continue;
|
if (supported_index == index) {
|
f->pixelformat = formats_list[i].fourcc;
|
return 0;
|
}
|
supported_index++;
|
}
|
|
return -EINVAL;
|
}
|
|
static int isc_g_fmt_vid_cap(struct file *file, void *priv,
|
struct v4l2_format *fmt)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
|
*fmt = isc->fmt;
|
|
return 0;
|
}
|
|
/*
|
* Checks the current configured format, if ISC can output it,
|
* considering which type of format the ISC receives from the sensor
|
*/
|
static int isc_try_validate_formats(struct isc_device *isc)
|
{
|
int ret;
|
bool bayer = false, yuv = false, rgb = false, grey = false;
|
|
/* all formats supported by the RLP module are OK */
|
switch (isc->try_config.fourcc) {
|
case V4L2_PIX_FMT_SBGGR8:
|
case V4L2_PIX_FMT_SGBRG8:
|
case V4L2_PIX_FMT_SGRBG8:
|
case V4L2_PIX_FMT_SRGGB8:
|
case V4L2_PIX_FMT_SBGGR10:
|
case V4L2_PIX_FMT_SGBRG10:
|
case V4L2_PIX_FMT_SGRBG10:
|
case V4L2_PIX_FMT_SRGGB10:
|
case V4L2_PIX_FMT_SBGGR12:
|
case V4L2_PIX_FMT_SGBRG12:
|
case V4L2_PIX_FMT_SGRBG12:
|
case V4L2_PIX_FMT_SRGGB12:
|
ret = 0;
|
bayer = true;
|
break;
|
|
case V4L2_PIX_FMT_YUV420:
|
case V4L2_PIX_FMT_YUV422P:
|
case V4L2_PIX_FMT_YUYV:
|
ret = 0;
|
yuv = true;
|
break;
|
|
case V4L2_PIX_FMT_RGB565:
|
case V4L2_PIX_FMT_ABGR32:
|
case V4L2_PIX_FMT_XBGR32:
|
case V4L2_PIX_FMT_ARGB444:
|
case V4L2_PIX_FMT_ARGB555:
|
ret = 0;
|
rgb = true;
|
break;
|
case V4L2_PIX_FMT_GREY:
|
case V4L2_PIX_FMT_Y10:
|
ret = 0;
|
grey = true;
|
break;
|
default:
|
/* any other different formats are not supported */
|
ret = -EINVAL;
|
}
|
v4l2_dbg(1, debug, &isc->v4l2_dev,
|
"Format validation, requested rgb=%u, yuv=%u, grey=%u, bayer=%u\n",
|
rgb, yuv, grey, bayer);
|
|
/* we cannot output RAW if we do not receive RAW */
|
if ((bayer) && !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code))
|
return -EINVAL;
|
|
/* we cannot output GREY if we do not receive RAW/GREY */
|
if (grey && !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code) &&
|
!ISC_IS_FORMAT_GREY(isc->try_config.sd_format->mbus_code))
|
return -EINVAL;
|
|
return ret;
|
}
|
|
/*
|
* Configures the RLP and DMA modules, depending on the output format
|
* configured for the ISC.
|
* If direct_dump == true, just dump raw data 8/16 bits depending on format.
|
*/
|
static int isc_try_configure_rlp_dma(struct isc_device *isc, bool direct_dump)
|
{
|
switch (isc->try_config.fourcc) {
|
case V4L2_PIX_FMT_SBGGR8:
|
case V4L2_PIX_FMT_SGBRG8:
|
case V4L2_PIX_FMT_SGRBG8:
|
case V4L2_PIX_FMT_SRGGB8:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 8;
|
break;
|
case V4L2_PIX_FMT_SBGGR10:
|
case V4L2_PIX_FMT_SGBRG10:
|
case V4L2_PIX_FMT_SGRBG10:
|
case V4L2_PIX_FMT_SRGGB10:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 16;
|
break;
|
case V4L2_PIX_FMT_SBGGR12:
|
case V4L2_PIX_FMT_SGBRG12:
|
case V4L2_PIX_FMT_SGRBG12:
|
case V4L2_PIX_FMT_SRGGB12:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 16;
|
break;
|
case V4L2_PIX_FMT_RGB565:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_RGB565;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 16;
|
break;
|
case V4L2_PIX_FMT_ARGB444:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB444;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 16;
|
break;
|
case V4L2_PIX_FMT_ARGB555:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB555;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 16;
|
break;
|
case V4L2_PIX_FMT_ABGR32:
|
case V4L2_PIX_FMT_XBGR32:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB32;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 32;
|
break;
|
case V4L2_PIX_FMT_YUV420:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC420P;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR;
|
isc->try_config.bpp = 12;
|
break;
|
case V4L2_PIX_FMT_YUV422P:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC422P;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR;
|
isc->try_config.bpp = 16;
|
break;
|
case V4L2_PIX_FMT_YUYV:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 16;
|
break;
|
case V4L2_PIX_FMT_GREY:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY8;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 8;
|
break;
|
case V4L2_PIX_FMT_Y10:
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY10;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
isc->try_config.bpp = 16;
|
break;
|
default:
|
return -EINVAL;
|
}
|
|
if (direct_dump) {
|
isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8;
|
isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
|
isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
|
return 0;
|
}
|
|
return 0;
|
}
|
|
/*
|
* Configuring pipeline modules, depending on which format the ISC outputs
|
* and considering which format it has as input from the sensor.
|
*/
|
static int isc_try_configure_pipeline(struct isc_device *isc)
|
{
|
switch (isc->try_config.fourcc) {
|
case V4L2_PIX_FMT_RGB565:
|
case V4L2_PIX_FMT_ARGB555:
|
case V4L2_PIX_FMT_ARGB444:
|
case V4L2_PIX_FMT_ABGR32:
|
case V4L2_PIX_FMT_XBGR32:
|
/* if sensor format is RAW, we convert inside ISC */
|
if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
|
isc->try_config.bits_pipeline = CFA_ENABLE |
|
WB_ENABLE | GAM_ENABLES;
|
} else {
|
isc->try_config.bits_pipeline = 0x0;
|
}
|
break;
|
case V4L2_PIX_FMT_YUV420:
|
/* if sensor format is RAW, we convert inside ISC */
|
if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
|
isc->try_config.bits_pipeline = CFA_ENABLE |
|
CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
|
SUB420_ENABLE | SUB422_ENABLE | CBC_ENABLE;
|
} else {
|
isc->try_config.bits_pipeline = 0x0;
|
}
|
break;
|
case V4L2_PIX_FMT_YUV422P:
|
/* if sensor format is RAW, we convert inside ISC */
|
if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
|
isc->try_config.bits_pipeline = CFA_ENABLE |
|
CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
|
SUB422_ENABLE | CBC_ENABLE;
|
} else {
|
isc->try_config.bits_pipeline = 0x0;
|
}
|
break;
|
case V4L2_PIX_FMT_YUYV:
|
/* if sensor format is RAW, we convert inside ISC */
|
if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
|
isc->try_config.bits_pipeline = CFA_ENABLE |
|
CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
|
SUB422_ENABLE | CBC_ENABLE;
|
} else {
|
isc->try_config.bits_pipeline = 0x0;
|
}
|
break;
|
case V4L2_PIX_FMT_GREY:
|
if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
|
/* if sensor format is RAW, we convert inside ISC */
|
isc->try_config.bits_pipeline = CFA_ENABLE |
|
CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
|
CBC_ENABLE;
|
} else {
|
isc->try_config.bits_pipeline = 0x0;
|
}
|
break;
|
default:
|
isc->try_config.bits_pipeline = 0x0;
|
}
|
return 0;
|
}
|
|
static void isc_try_fse(struct isc_device *isc,
|
struct v4l2_subdev_pad_config *pad_cfg)
|
{
|
int ret;
|
struct v4l2_subdev_frame_size_enum fse = {};
|
|
/*
|
* If we do not know yet which format the subdev is using, we cannot
|
* do anything.
|
*/
|
if (!isc->try_config.sd_format)
|
return;
|
|
fse.code = isc->try_config.sd_format->mbus_code;
|
fse.which = V4L2_SUBDEV_FORMAT_TRY;
|
|
ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size,
|
pad_cfg, &fse);
|
/*
|
* Attempt to obtain format size from subdev. If not available,
|
* just use the maximum ISC can receive.
|
*/
|
if (ret) {
|
pad_cfg->try_crop.width = ISC_MAX_SUPPORT_WIDTH;
|
pad_cfg->try_crop.height = ISC_MAX_SUPPORT_HEIGHT;
|
} else {
|
pad_cfg->try_crop.width = fse.max_width;
|
pad_cfg->try_crop.height = fse.max_height;
|
}
|
}
|
|
static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
|
u32 *code)
|
{
|
int i;
|
struct isc_format *sd_fmt = NULL, *direct_fmt = NULL;
|
struct v4l2_pix_format *pixfmt = &f->fmt.pix;
|
struct v4l2_subdev_pad_config pad_cfg = {};
|
struct v4l2_subdev_format format = {
|
.which = V4L2_SUBDEV_FORMAT_TRY,
|
};
|
u32 mbus_code;
|
int ret;
|
bool rlp_dma_direct_dump = false;
|
|
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
return -EINVAL;
|
|
/* Step 1: find a RAW format that is supported */
|
for (i = 0; i < isc->num_user_formats; i++) {
|
if (ISC_IS_FORMAT_RAW(isc->user_formats[i]->mbus_code)) {
|
sd_fmt = isc->user_formats[i];
|
break;
|
}
|
}
|
/* Step 2: We can continue with this RAW format, or we can look
|
* for better: maybe sensor supports directly what we need.
|
*/
|
direct_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat);
|
|
/* Step 3: We have both. We decide given the module parameter which
|
* one to use.
|
*/
|
if (direct_fmt && sd_fmt && sensor_preferred)
|
sd_fmt = direct_fmt;
|
|
/* Step 4: we do not have RAW but we have a direct format. Use it. */
|
if (direct_fmt && !sd_fmt)
|
sd_fmt = direct_fmt;
|
|
/* Step 5: if we are using a direct format, we need to package
|
* everything as 8 bit data and just dump it
|
*/
|
if (sd_fmt == direct_fmt)
|
rlp_dma_direct_dump = true;
|
|
/* Step 6: We have no format. This can happen if the userspace
|
* requests some weird/invalid format.
|
* In this case, default to whatever we have
|
*/
|
if (!sd_fmt && !direct_fmt) {
|
sd_fmt = isc->user_formats[isc->num_user_formats - 1];
|
v4l2_dbg(1, debug, &isc->v4l2_dev,
|
"Sensor not supporting %.4s, using %.4s\n",
|
(char *)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc);
|
}
|
|
if (!sd_fmt) {
|
ret = -EINVAL;
|
goto isc_try_fmt_err;
|
}
|
|
/* Step 7: Print out what we decided for debugging */
|
v4l2_dbg(1, debug, &isc->v4l2_dev,
|
"Preferring to have sensor using format %.4s\n",
|
(char *)&sd_fmt->fourcc);
|
|
/* Step 8: at this moment we decided which format the subdev will use */
|
isc->try_config.sd_format = sd_fmt;
|
|
/* Limit to Atmel ISC hardware capabilities */
|
if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
|
pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
|
if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
|
pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
|
|
/*
|
* The mbus format is the one the subdev outputs.
|
* The pixels will be transferred in this format Sensor -> ISC
|
*/
|
mbus_code = sd_fmt->mbus_code;
|
|
/*
|
* Validate formats. If the required format is not OK, default to raw.
|
*/
|
|
isc->try_config.fourcc = pixfmt->pixelformat;
|
|
if (isc_try_validate_formats(isc)) {
|
pixfmt->pixelformat = isc->try_config.fourcc = sd_fmt->fourcc;
|
/* Re-try to validate the new format */
|
ret = isc_try_validate_formats(isc);
|
if (ret)
|
goto isc_try_fmt_err;
|
}
|
|
ret = isc_try_configure_rlp_dma(isc, rlp_dma_direct_dump);
|
if (ret)
|
goto isc_try_fmt_err;
|
|
ret = isc_try_configure_pipeline(isc);
|
if (ret)
|
goto isc_try_fmt_err;
|
|
/* Obtain frame sizes if possible to have crop requirements ready */
|
isc_try_fse(isc, &pad_cfg);
|
|
v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code);
|
ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt,
|
&pad_cfg, &format);
|
if (ret < 0)
|
goto isc_try_fmt_subdev_err;
|
|
v4l2_fill_pix_format(pixfmt, &format.format);
|
|
pixfmt->field = V4L2_FIELD_NONE;
|
pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3;
|
pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
|
|
if (code)
|
*code = mbus_code;
|
|
return 0;
|
|
isc_try_fmt_err:
|
v4l2_err(&isc->v4l2_dev, "Could not find any possible format for a working pipeline\n");
|
isc_try_fmt_subdev_err:
|
memset(&isc->try_config, 0, sizeof(isc->try_config));
|
|
return ret;
|
}
|
|
static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
|
{
|
struct v4l2_subdev_format format = {
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
};
|
u32 mbus_code = 0;
|
int ret;
|
|
ret = isc_try_fmt(isc, f, &mbus_code);
|
if (ret)
|
return ret;
|
|
v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code);
|
ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
|
set_fmt, NULL, &format);
|
if (ret < 0)
|
return ret;
|
|
isc->fmt = *f;
|
|
if (isc->try_config.sd_format && isc->config.sd_format &&
|
isc->try_config.sd_format != isc->config.sd_format) {
|
isc->ctrls.hist_stat = HIST_INIT;
|
isc_reset_awb_ctrls(isc);
|
isc_update_v4l2_ctrls(isc);
|
}
|
/* make the try configuration active */
|
isc->config = isc->try_config;
|
|
v4l2_dbg(1, debug, &isc->v4l2_dev, "New ISC configuration in place\n");
|
|
return 0;
|
}
|
|
static int isc_s_fmt_vid_cap(struct file *file, void *priv,
|
struct v4l2_format *f)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
|
if (vb2_is_streaming(&isc->vb2_vidq))
|
return -EBUSY;
|
|
return isc_set_fmt(isc, f);
|
}
|
|
static int isc_try_fmt_vid_cap(struct file *file, void *priv,
|
struct v4l2_format *f)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
|
return isc_try_fmt(isc, f, NULL);
|
}
|
|
static int isc_enum_input(struct file *file, void *priv,
|
struct v4l2_input *inp)
|
{
|
if (inp->index != 0)
|
return -EINVAL;
|
|
inp->type = V4L2_INPUT_TYPE_CAMERA;
|
inp->std = 0;
|
strscpy(inp->name, "Camera", sizeof(inp->name));
|
|
return 0;
|
}
|
|
static int isc_g_input(struct file *file, void *priv, unsigned int *i)
|
{
|
*i = 0;
|
|
return 0;
|
}
|
|
static int isc_s_input(struct file *file, void *priv, unsigned int i)
|
{
|
if (i > 0)
|
return -EINVAL;
|
|
return 0;
|
}
|
|
static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
|
return v4l2_g_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
|
}
|
|
static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
|
return v4l2_s_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
|
}
|
|
static int isc_enum_framesizes(struct file *file, void *fh,
|
struct v4l2_frmsizeenum *fsize)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
struct v4l2_subdev_frame_size_enum fse = {
|
.code = isc->config.sd_format->mbus_code,
|
.index = fsize->index,
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
};
|
int ret = -EINVAL;
|
int i;
|
|
for (i = 0; i < isc->num_user_formats; i++)
|
if (isc->user_formats[i]->fourcc == fsize->pixel_format)
|
ret = 0;
|
|
for (i = 0; i < ARRAY_SIZE(controller_formats); i++)
|
if (controller_formats[i].fourcc == fsize->pixel_format)
|
ret = 0;
|
|
if (ret)
|
return ret;
|
|
ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size,
|
NULL, &fse);
|
if (ret)
|
return ret;
|
|
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
|
fsize->discrete.width = fse.max_width;
|
fsize->discrete.height = fse.max_height;
|
|
return 0;
|
}
|
|
static int isc_enum_frameintervals(struct file *file, void *fh,
|
struct v4l2_frmivalenum *fival)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
struct v4l2_subdev_frame_interval_enum fie = {
|
.code = isc->config.sd_format->mbus_code,
|
.index = fival->index,
|
.width = fival->width,
|
.height = fival->height,
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
};
|
int ret = -EINVAL;
|
unsigned int i;
|
|
for (i = 0; i < isc->num_user_formats; i++)
|
if (isc->user_formats[i]->fourcc == fival->pixel_format)
|
ret = 0;
|
|
for (i = 0; i < ARRAY_SIZE(controller_formats); i++)
|
if (controller_formats[i].fourcc == fival->pixel_format)
|
ret = 0;
|
|
if (ret)
|
return ret;
|
|
ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
|
enum_frame_interval, NULL, &fie);
|
if (ret)
|
return ret;
|
|
fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
|
fival->discrete = fie.interval;
|
|
return 0;
|
}
|
|
static const struct v4l2_ioctl_ops isc_ioctl_ops = {
|
.vidioc_querycap = isc_querycap,
|
.vidioc_enum_fmt_vid_cap = isc_enum_fmt_vid_cap,
|
.vidioc_g_fmt_vid_cap = isc_g_fmt_vid_cap,
|
.vidioc_s_fmt_vid_cap = isc_s_fmt_vid_cap,
|
.vidioc_try_fmt_vid_cap = isc_try_fmt_vid_cap,
|
|
.vidioc_enum_input = isc_enum_input,
|
.vidioc_g_input = isc_g_input,
|
.vidioc_s_input = isc_s_input,
|
|
.vidioc_reqbufs = vb2_ioctl_reqbufs,
|
.vidioc_querybuf = vb2_ioctl_querybuf,
|
.vidioc_qbuf = vb2_ioctl_qbuf,
|
.vidioc_expbuf = vb2_ioctl_expbuf,
|
.vidioc_dqbuf = vb2_ioctl_dqbuf,
|
.vidioc_create_bufs = vb2_ioctl_create_bufs,
|
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
|
.vidioc_streamon = vb2_ioctl_streamon,
|
.vidioc_streamoff = vb2_ioctl_streamoff,
|
|
.vidioc_g_parm = isc_g_parm,
|
.vidioc_s_parm = isc_s_parm,
|
.vidioc_enum_framesizes = isc_enum_framesizes,
|
.vidioc_enum_frameintervals = isc_enum_frameintervals,
|
|
.vidioc_log_status = v4l2_ctrl_log_status,
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
|
};
|
|
static int isc_open(struct file *file)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
struct v4l2_subdev *sd = isc->current_subdev->sd;
|
int ret;
|
|
if (mutex_lock_interruptible(&isc->lock))
|
return -ERESTARTSYS;
|
|
ret = v4l2_fh_open(file);
|
if (ret < 0)
|
goto unlock;
|
|
if (!v4l2_fh_is_singular_file(file))
|
goto unlock;
|
|
ret = v4l2_subdev_call(sd, core, s_power, 1);
|
if (ret < 0 && ret != -ENOIOCTLCMD) {
|
v4l2_fh_release(file);
|
goto unlock;
|
}
|
|
ret = isc_set_fmt(isc, &isc->fmt);
|
if (ret) {
|
v4l2_subdev_call(sd, core, s_power, 0);
|
v4l2_fh_release(file);
|
}
|
|
unlock:
|
mutex_unlock(&isc->lock);
|
return ret;
|
}
|
|
static int isc_release(struct file *file)
|
{
|
struct isc_device *isc = video_drvdata(file);
|
struct v4l2_subdev *sd = isc->current_subdev->sd;
|
bool fh_singular;
|
int ret;
|
|
mutex_lock(&isc->lock);
|
|
fh_singular = v4l2_fh_is_singular_file(file);
|
|
ret = _vb2_fop_release(file, NULL);
|
|
if (fh_singular)
|
v4l2_subdev_call(sd, core, s_power, 0);
|
|
mutex_unlock(&isc->lock);
|
|
return ret;
|
}
|
|
static const struct v4l2_file_operations isc_fops = {
|
.owner = THIS_MODULE,
|
.open = isc_open,
|
.release = isc_release,
|
.unlocked_ioctl = video_ioctl2,
|
.read = vb2_fop_read,
|
.mmap = vb2_fop_mmap,
|
.poll = vb2_fop_poll,
|
};
|
|
irqreturn_t isc_interrupt(int irq, void *dev_id)
|
{
|
struct isc_device *isc = (struct isc_device *)dev_id;
|
struct regmap *regmap = isc->regmap;
|
u32 isc_intsr, isc_intmask, pending;
|
irqreturn_t ret = IRQ_NONE;
|
|
regmap_read(regmap, ISC_INTSR, &isc_intsr);
|
regmap_read(regmap, ISC_INTMASK, &isc_intmask);
|
|
pending = isc_intsr & isc_intmask;
|
|
if (likely(pending & ISC_INT_DDONE)) {
|
spin_lock(&isc->dma_queue_lock);
|
if (isc->cur_frm) {
|
struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb;
|
struct vb2_buffer *vb = &vbuf->vb2_buf;
|
|
vb->timestamp = ktime_get_ns();
|
vbuf->sequence = isc->sequence++;
|
vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
|
isc->cur_frm = NULL;
|
}
|
|
if (!list_empty(&isc->dma_queue) && !isc->stop) {
|
isc->cur_frm = list_first_entry(&isc->dma_queue,
|
struct isc_buffer, list);
|
list_del(&isc->cur_frm->list);
|
|
isc_start_dma(isc);
|
}
|
|
if (isc->stop)
|
complete(&isc->comp);
|
|
ret = IRQ_HANDLED;
|
spin_unlock(&isc->dma_queue_lock);
|
}
|
|
if (pending & ISC_INT_HISDONE) {
|
schedule_work(&isc->awb_work);
|
ret = IRQ_HANDLED;
|
}
|
|
return ret;
|
}
|
|
static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max)
|
{
|
struct regmap *regmap = isc->regmap;
|
struct isc_ctrls *ctrls = &isc->ctrls;
|
u32 *hist_count = &ctrls->hist_count[ctrls->hist_id];
|
u32 *hist_entry = &ctrls->hist_entry[0];
|
u32 i;
|
|
*min = 0;
|
*max = HIST_ENTRIES;
|
|
regmap_bulk_read(regmap, ISC_HIS_ENTRY, hist_entry, HIST_ENTRIES);
|
|
*hist_count = 0;
|
/*
|
* we deliberately ignore the end of the histogram,
|
* the most white pixels
|
*/
|
for (i = 1; i < HIST_ENTRIES; i++) {
|
if (*hist_entry && !*min)
|
*min = i;
|
if (*hist_entry)
|
*max = i;
|
*hist_count += i * (*hist_entry++);
|
}
|
|
if (!*min)
|
*min = 1;
|
}
|
|
static void isc_wb_update(struct isc_ctrls *ctrls)
|
{
|
u32 *hist_count = &ctrls->hist_count[0];
|
u32 c, offset[4];
|
u64 avg = 0;
|
/* We compute two gains, stretch gain and grey world gain */
|
u32 s_gain[4], gw_gain[4];
|
|
/*
|
* According to Grey World, we need to set gains for R/B to normalize
|
* them towards the green channel.
|
* Thus we want to keep Green as fixed and adjust only Red/Blue
|
* Compute the average of the both green channels first
|
*/
|
avg = (u64)hist_count[ISC_HIS_CFG_MODE_GR] +
|
(u64)hist_count[ISC_HIS_CFG_MODE_GB];
|
avg >>= 1;
|
|
/* Green histogram is null, nothing to do */
|
if (!avg)
|
return;
|
|
for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) {
|
/*
|
* the color offset is the minimum value of the histogram.
|
* we stretch this color to the full range by substracting
|
* this value from the color component.
|
*/
|
offset[c] = ctrls->hist_minmax[c][HIST_MIN_INDEX];
|
/*
|
* The offset is always at least 1. If the offset is 1, we do
|
* not need to adjust it, so our result must be zero.
|
* the offset is computed in a histogram on 9 bits (0..512)
|
* but the offset in register is based on
|
* 12 bits pipeline (0..4096).
|
* we need to shift with the 3 bits that the histogram is
|
* ignoring
|
*/
|
ctrls->offset[c] = (offset[c] - 1) << 3;
|
|
/*
|
* the offset is then taken and converted to 2's complements,
|
* and must be negative, as we subtract this value from the
|
* color components
|
*/
|
ctrls->offset[c] = -ctrls->offset[c];
|
|
/*
|
* the stretch gain is the total number of histogram bins
|
* divided by the actual range of color component (Max - Min)
|
* If we compute gain like this, the actual color component
|
* will be stretched to the full histogram.
|
* We need to shift 9 bits for precision, we have 9 bits for
|
* decimals
|
*/
|
s_gain[c] = (HIST_ENTRIES << 9) /
|
(ctrls->hist_minmax[c][HIST_MAX_INDEX] -
|
ctrls->hist_minmax[c][HIST_MIN_INDEX] + 1);
|
|
/*
|
* Now we have to compute the gain w.r.t. the average.
|
* Add/lose gain to the component towards the average.
|
* If it happens that the component is zero, use the
|
* fixed point value : 1.0 gain.
|
*/
|
if (hist_count[c])
|
gw_gain[c] = div_u64(avg << 9, hist_count[c]);
|
else
|
gw_gain[c] = 1 << 9;
|
|
/* multiply both gains and adjust for decimals */
|
ctrls->gain[c] = s_gain[c] * gw_gain[c];
|
ctrls->gain[c] >>= 9;
|
}
|
}
|
|
static void isc_awb_work(struct work_struct *w)
|
{
|
struct isc_device *isc =
|
container_of(w, struct isc_device, awb_work);
|
struct regmap *regmap = isc->regmap;
|
struct isc_ctrls *ctrls = &isc->ctrls;
|
u32 hist_id = ctrls->hist_id;
|
u32 baysel;
|
unsigned long flags;
|
u32 min, max;
|
|
/* streaming is not active anymore */
|
if (isc->stop)
|
return;
|
|
if (ctrls->hist_stat != HIST_ENABLED)
|
return;
|
|
isc_hist_count(isc, &min, &max);
|
ctrls->hist_minmax[hist_id][HIST_MIN_INDEX] = min;
|
ctrls->hist_minmax[hist_id][HIST_MAX_INDEX] = max;
|
|
if (hist_id != ISC_HIS_CFG_MODE_B) {
|
hist_id++;
|
} else {
|
isc_wb_update(ctrls);
|
hist_id = ISC_HIS_CFG_MODE_GR;
|
}
|
|
ctrls->hist_id = hist_id;
|
baysel = isc->config.sd_format->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT;
|
|
pm_runtime_get_sync(isc->dev);
|
|
/*
|
* only update if we have all the required histograms and controls
|
* if awb has been disabled, we need to reset registers as well.
|
*/
|
if (hist_id == ISC_HIS_CFG_MODE_GR || ctrls->awb == ISC_WB_NONE) {
|
/*
|
* It may happen that DMA Done IRQ will trigger while we are
|
* updating white balance registers here.
|
* In that case, only parts of the controls have been updated.
|
* We can avoid that by locking the section.
|
*/
|
spin_lock_irqsave(&isc->awb_lock, flags);
|
isc_update_awb_ctrls(isc);
|
spin_unlock_irqrestore(&isc->awb_lock, flags);
|
|
/*
|
* if we are doing just the one time white balance adjustment,
|
* we are basically done.
|
*/
|
if (ctrls->awb == ISC_WB_ONETIME) {
|
v4l2_info(&isc->v4l2_dev,
|
"Completed one time white-balance adjustment.\n");
|
/* update the v4l2 controls values */
|
isc_update_v4l2_ctrls(isc);
|
ctrls->awb = ISC_WB_NONE;
|
}
|
}
|
regmap_write(regmap, ISC_HIS_CFG, hist_id | baysel | ISC_HIS_CFG_RAR);
|
isc_update_profile(isc);
|
/* if awb has been disabled, we don't need to start another histogram */
|
if (ctrls->awb)
|
regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
|
|
pm_runtime_put_sync(isc->dev);
|
}
|
|
static int isc_s_ctrl(struct v4l2_ctrl *ctrl)
|
{
|
struct isc_device *isc = container_of(ctrl->handler,
|
struct isc_device, ctrls.handler);
|
struct isc_ctrls *ctrls = &isc->ctrls;
|
|
if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
|
return 0;
|
|
switch (ctrl->id) {
|
case V4L2_CID_BRIGHTNESS:
|
ctrls->brightness = ctrl->val & ISC_CBC_BRIGHT_MASK;
|
break;
|
case V4L2_CID_CONTRAST:
|
ctrls->contrast = ctrl->val & ISC_CBC_CONTRAST_MASK;
|
break;
|
case V4L2_CID_GAMMA:
|
ctrls->gamma_index = ctrl->val;
|
break;
|
default:
|
return -EINVAL;
|
}
|
|
return 0;
|
}
|
|
static const struct v4l2_ctrl_ops isc_ctrl_ops = {
|
.s_ctrl = isc_s_ctrl,
|
};
|
|
static int isc_s_awb_ctrl(struct v4l2_ctrl *ctrl)
|
{
|
struct isc_device *isc = container_of(ctrl->handler,
|
struct isc_device, ctrls.handler);
|
struct isc_ctrls *ctrls = &isc->ctrls;
|
|
if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
|
return 0;
|
|
switch (ctrl->id) {
|
case V4L2_CID_AUTO_WHITE_BALANCE:
|
if (ctrl->val == 1)
|
ctrls->awb = ISC_WB_AUTO;
|
else
|
ctrls->awb = ISC_WB_NONE;
|
|
/* we did not configure ISC yet */
|
if (!isc->config.sd_format)
|
break;
|
|
/* configure the controls with new values from v4l2 */
|
if (ctrl->cluster[ISC_CTRL_R_GAIN]->is_new)
|
ctrls->gain[ISC_HIS_CFG_MODE_R] = isc->r_gain_ctrl->val;
|
if (ctrl->cluster[ISC_CTRL_B_GAIN]->is_new)
|
ctrls->gain[ISC_HIS_CFG_MODE_B] = isc->b_gain_ctrl->val;
|
if (ctrl->cluster[ISC_CTRL_GR_GAIN]->is_new)
|
ctrls->gain[ISC_HIS_CFG_MODE_GR] = isc->gr_gain_ctrl->val;
|
if (ctrl->cluster[ISC_CTRL_GB_GAIN]->is_new)
|
ctrls->gain[ISC_HIS_CFG_MODE_GB] = isc->gb_gain_ctrl->val;
|
|
if (ctrl->cluster[ISC_CTRL_R_OFF]->is_new)
|
ctrls->offset[ISC_HIS_CFG_MODE_R] = isc->r_off_ctrl->val;
|
if (ctrl->cluster[ISC_CTRL_B_OFF]->is_new)
|
ctrls->offset[ISC_HIS_CFG_MODE_B] = isc->b_off_ctrl->val;
|
if (ctrl->cluster[ISC_CTRL_GR_OFF]->is_new)
|
ctrls->offset[ISC_HIS_CFG_MODE_GR] = isc->gr_off_ctrl->val;
|
if (ctrl->cluster[ISC_CTRL_GB_OFF]->is_new)
|
ctrls->offset[ISC_HIS_CFG_MODE_GB] = isc->gb_off_ctrl->val;
|
|
isc_update_awb_ctrls(isc);
|
|
if (vb2_is_streaming(&isc->vb2_vidq)) {
|
/*
|
* If we are streaming, we can update profile to
|
* have the new settings in place.
|
*/
|
isc_update_profile(isc);
|
} else {
|
/*
|
* The auto cluster will activate automatically this
|
* control. This has to be deactivated when not
|
* streaming.
|
*/
|
v4l2_ctrl_activate(isc->do_wb_ctrl, false);
|
}
|
|
/* if we have autowhitebalance on, start histogram procedure */
|
if (ctrls->awb == ISC_WB_AUTO &&
|
vb2_is_streaming(&isc->vb2_vidq) &&
|
ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
|
isc_set_histogram(isc, true);
|
|
/*
|
* for one time whitebalance adjustment, check the button,
|
* if it's pressed, perform the one time operation.
|
*/
|
if (ctrls->awb == ISC_WB_NONE &&
|
ctrl->cluster[ISC_CTRL_DO_WB]->is_new &&
|
!(ctrl->cluster[ISC_CTRL_DO_WB]->flags &
|
V4L2_CTRL_FLAG_INACTIVE)) {
|
ctrls->awb = ISC_WB_ONETIME;
|
isc_set_histogram(isc, true);
|
v4l2_dbg(1, debug, &isc->v4l2_dev,
|
"One time white-balance started.\n");
|
}
|
return 0;
|
}
|
return 0;
|
}
|
|
static int isc_g_volatile_awb_ctrl(struct v4l2_ctrl *ctrl)
|
{
|
struct isc_device *isc = container_of(ctrl->handler,
|
struct isc_device, ctrls.handler);
|
struct isc_ctrls *ctrls = &isc->ctrls;
|
|
switch (ctrl->id) {
|
/* being a cluster, this id will be called for every control */
|
case V4L2_CID_AUTO_WHITE_BALANCE:
|
ctrl->cluster[ISC_CTRL_R_GAIN]->val =
|
ctrls->gain[ISC_HIS_CFG_MODE_R];
|
ctrl->cluster[ISC_CTRL_B_GAIN]->val =
|
ctrls->gain[ISC_HIS_CFG_MODE_B];
|
ctrl->cluster[ISC_CTRL_GR_GAIN]->val =
|
ctrls->gain[ISC_HIS_CFG_MODE_GR];
|
ctrl->cluster[ISC_CTRL_GB_GAIN]->val =
|
ctrls->gain[ISC_HIS_CFG_MODE_GB];
|
|
ctrl->cluster[ISC_CTRL_R_OFF]->val =
|
ctrls->offset[ISC_HIS_CFG_MODE_R];
|
ctrl->cluster[ISC_CTRL_B_OFF]->val =
|
ctrls->offset[ISC_HIS_CFG_MODE_B];
|
ctrl->cluster[ISC_CTRL_GR_OFF]->val =
|
ctrls->offset[ISC_HIS_CFG_MODE_GR];
|
ctrl->cluster[ISC_CTRL_GB_OFF]->val =
|
ctrls->offset[ISC_HIS_CFG_MODE_GB];
|
break;
|
}
|
return 0;
|
}
|
|
static const struct v4l2_ctrl_ops isc_awb_ops = {
|
.s_ctrl = isc_s_awb_ctrl,
|
.g_volatile_ctrl = isc_g_volatile_awb_ctrl,
|
};
|
|
#define ISC_CTRL_OFF(_name, _id, _name_str) \
|
static const struct v4l2_ctrl_config _name = { \
|
.ops = &isc_awb_ops, \
|
.id = _id, \
|
.name = _name_str, \
|
.type = V4L2_CTRL_TYPE_INTEGER, \
|
.flags = V4L2_CTRL_FLAG_SLIDER, \
|
.min = -4095, \
|
.max = 4095, \
|
.step = 1, \
|
.def = 0, \
|
}
|
|
ISC_CTRL_OFF(isc_r_off_ctrl, ISC_CID_R_OFFSET, "Red Component Offset");
|
ISC_CTRL_OFF(isc_b_off_ctrl, ISC_CID_B_OFFSET, "Blue Component Offset");
|
ISC_CTRL_OFF(isc_gr_off_ctrl, ISC_CID_GR_OFFSET, "Green Red Component Offset");
|
ISC_CTRL_OFF(isc_gb_off_ctrl, ISC_CID_GB_OFFSET, "Green Blue Component Offset");
|
|
#define ISC_CTRL_GAIN(_name, _id, _name_str) \
|
static const struct v4l2_ctrl_config _name = { \
|
.ops = &isc_awb_ops, \
|
.id = _id, \
|
.name = _name_str, \
|
.type = V4L2_CTRL_TYPE_INTEGER, \
|
.flags = V4L2_CTRL_FLAG_SLIDER, \
|
.min = 0, \
|
.max = 8191, \
|
.step = 1, \
|
.def = 512, \
|
}
|
|
ISC_CTRL_GAIN(isc_r_gain_ctrl, ISC_CID_R_GAIN, "Red Component Gain");
|
ISC_CTRL_GAIN(isc_b_gain_ctrl, ISC_CID_B_GAIN, "Blue Component Gain");
|
ISC_CTRL_GAIN(isc_gr_gain_ctrl, ISC_CID_GR_GAIN, "Green Red Component Gain");
|
ISC_CTRL_GAIN(isc_gb_gain_ctrl, ISC_CID_GB_GAIN, "Green Blue Component Gain");
|
|
static int isc_ctrl_init(struct isc_device *isc)
|
{
|
const struct v4l2_ctrl_ops *ops = &isc_ctrl_ops;
|
struct isc_ctrls *ctrls = &isc->ctrls;
|
struct v4l2_ctrl_handler *hdl = &ctrls->handler;
|
int ret;
|
|
ctrls->hist_stat = HIST_INIT;
|
isc_reset_awb_ctrls(isc);
|
|
ret = v4l2_ctrl_handler_init(hdl, 13);
|
if (ret < 0)
|
return ret;
|
|
ctrls->brightness = 0;
|
ctrls->contrast = 256;
|
|
v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0);
|
v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256);
|
v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, GAMMA_MAX, 1, 2);
|
isc->awb_ctrl = v4l2_ctrl_new_std(hdl, &isc_awb_ops,
|
V4L2_CID_AUTO_WHITE_BALANCE,
|
0, 1, 1, 1);
|
|
/* do_white_balance is a button, so min,max,step,default are ignored */
|
isc->do_wb_ctrl = v4l2_ctrl_new_std(hdl, &isc_awb_ops,
|
V4L2_CID_DO_WHITE_BALANCE,
|
0, 0, 0, 0);
|
|
if (!isc->do_wb_ctrl) {
|
ret = hdl->error;
|
v4l2_ctrl_handler_free(hdl);
|
return ret;
|
}
|
|
v4l2_ctrl_activate(isc->do_wb_ctrl, false);
|
|
isc->r_gain_ctrl = v4l2_ctrl_new_custom(hdl, &isc_r_gain_ctrl, NULL);
|
isc->b_gain_ctrl = v4l2_ctrl_new_custom(hdl, &isc_b_gain_ctrl, NULL);
|
isc->gr_gain_ctrl = v4l2_ctrl_new_custom(hdl, &isc_gr_gain_ctrl, NULL);
|
isc->gb_gain_ctrl = v4l2_ctrl_new_custom(hdl, &isc_gb_gain_ctrl, NULL);
|
isc->r_off_ctrl = v4l2_ctrl_new_custom(hdl, &isc_r_off_ctrl, NULL);
|
isc->b_off_ctrl = v4l2_ctrl_new_custom(hdl, &isc_b_off_ctrl, NULL);
|
isc->gr_off_ctrl = v4l2_ctrl_new_custom(hdl, &isc_gr_off_ctrl, NULL);
|
isc->gb_off_ctrl = v4l2_ctrl_new_custom(hdl, &isc_gb_off_ctrl, NULL);
|
|
/*
|
* The cluster is in auto mode with autowhitebalance enabled
|
* and manual mode otherwise.
|
*/
|
v4l2_ctrl_auto_cluster(10, &isc->awb_ctrl, 0, true);
|
|
v4l2_ctrl_handler_setup(hdl);
|
|
return 0;
|
}
|
|
static int isc_async_bound(struct v4l2_async_notifier *notifier,
|
struct v4l2_subdev *subdev,
|
struct v4l2_async_subdev *asd)
|
{
|
struct isc_device *isc = container_of(notifier->v4l2_dev,
|
struct isc_device, v4l2_dev);
|
struct isc_subdev_entity *subdev_entity =
|
container_of(notifier, struct isc_subdev_entity, notifier);
|
|
if (video_is_registered(&isc->video_dev)) {
|
v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n");
|
return -EBUSY;
|
}
|
|
subdev_entity->sd = subdev;
|
|
return 0;
|
}
|
|
static void isc_async_unbind(struct v4l2_async_notifier *notifier,
|
struct v4l2_subdev *subdev,
|
struct v4l2_async_subdev *asd)
|
{
|
struct isc_device *isc = container_of(notifier->v4l2_dev,
|
struct isc_device, v4l2_dev);
|
cancel_work_sync(&isc->awb_work);
|
video_unregister_device(&isc->video_dev);
|
v4l2_ctrl_handler_free(&isc->ctrls.handler);
|
}
|
|
static struct isc_format *find_format_by_code(unsigned int code, int *index)
|
{
|
struct isc_format *fmt = &formats_list[0];
|
unsigned int i;
|
|
for (i = 0; i < ARRAY_SIZE(formats_list); i++) {
|
if (fmt->mbus_code == code) {
|
*index = i;
|
return fmt;
|
}
|
|
fmt++;
|
}
|
|
return NULL;
|
}
|
|
static int isc_formats_init(struct isc_device *isc)
|
{
|
struct isc_format *fmt;
|
struct v4l2_subdev *subdev = isc->current_subdev->sd;
|
unsigned int num_fmts, i, j;
|
u32 list_size = ARRAY_SIZE(formats_list);
|
struct v4l2_subdev_mbus_code_enum mbus_code = {
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
};
|
|
num_fmts = 0;
|
while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
|
NULL, &mbus_code)) {
|
mbus_code.index++;
|
|
fmt = find_format_by_code(mbus_code.code, &i);
|
if (!fmt) {
|
v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n",
|
mbus_code.code);
|
continue;
|
}
|
|
fmt->sd_support = true;
|
num_fmts++;
|
}
|
|
if (!num_fmts)
|
return -ENXIO;
|
|
isc->num_user_formats = num_fmts;
|
isc->user_formats = devm_kcalloc(isc->dev,
|
num_fmts, sizeof(*isc->user_formats),
|
GFP_KERNEL);
|
if (!isc->user_formats)
|
return -ENOMEM;
|
|
fmt = &formats_list[0];
|
for (i = 0, j = 0; i < list_size; i++) {
|
if (fmt->sd_support)
|
isc->user_formats[j++] = fmt;
|
fmt++;
|
}
|
|
return 0;
|
}
|
|
static int isc_set_default_fmt(struct isc_device *isc)
|
{
|
struct v4l2_format f = {
|
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
.fmt.pix = {
|
.width = VGA_WIDTH,
|
.height = VGA_HEIGHT,
|
.field = V4L2_FIELD_NONE,
|
.pixelformat = isc->user_formats[0]->fourcc,
|
},
|
};
|
int ret;
|
|
ret = isc_try_fmt(isc, &f, NULL);
|
if (ret)
|
return ret;
|
|
isc->fmt = f;
|
return 0;
|
}
|
|
static int isc_async_complete(struct v4l2_async_notifier *notifier)
|
{
|
struct isc_device *isc = container_of(notifier->v4l2_dev,
|
struct isc_device, v4l2_dev);
|
struct video_device *vdev = &isc->video_dev;
|
struct vb2_queue *q = &isc->vb2_vidq;
|
int ret = 0;
|
|
INIT_WORK(&isc->awb_work, isc_awb_work);
|
|
ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev);
|
if (ret < 0) {
|
v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n");
|
return ret;
|
}
|
|
isc->current_subdev = container_of(notifier,
|
struct isc_subdev_entity, notifier);
|
mutex_init(&isc->lock);
|
init_completion(&isc->comp);
|
|
/* Initialize videobuf2 queue */
|
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
|
q->drv_priv = isc;
|
q->buf_struct_size = sizeof(struct isc_buffer);
|
q->ops = &isc_vb2_ops;
|
q->mem_ops = &vb2_dma_contig_memops;
|
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
q->lock = &isc->lock;
|
q->min_buffers_needed = 1;
|
q->dev = isc->dev;
|
|
ret = vb2_queue_init(q);
|
if (ret < 0) {
|
v4l2_err(&isc->v4l2_dev,
|
"vb2_queue_init() failed: %d\n", ret);
|
goto isc_async_complete_err;
|
}
|
|
/* Init video dma queues */
|
INIT_LIST_HEAD(&isc->dma_queue);
|
spin_lock_init(&isc->dma_queue_lock);
|
spin_lock_init(&isc->awb_lock);
|
|
ret = isc_formats_init(isc);
|
if (ret < 0) {
|
v4l2_err(&isc->v4l2_dev,
|
"Init format failed: %d\n", ret);
|
goto isc_async_complete_err;
|
}
|
|
ret = isc_set_default_fmt(isc);
|
if (ret) {
|
v4l2_err(&isc->v4l2_dev, "Could not set default format\n");
|
goto isc_async_complete_err;
|
}
|
|
ret = isc_ctrl_init(isc);
|
if (ret) {
|
v4l2_err(&isc->v4l2_dev, "Init isc ctrols failed: %d\n", ret);
|
goto isc_async_complete_err;
|
}
|
|
/* Register video device */
|
strscpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name));
|
vdev->release = video_device_release_empty;
|
vdev->fops = &isc_fops;
|
vdev->ioctl_ops = &isc_ioctl_ops;
|
vdev->v4l2_dev = &isc->v4l2_dev;
|
vdev->vfl_dir = VFL_DIR_RX;
|
vdev->queue = q;
|
vdev->lock = &isc->lock;
|
vdev->ctrl_handler = &isc->ctrls.handler;
|
vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
|
video_set_drvdata(vdev, isc);
|
|
ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
|
if (ret < 0) {
|
v4l2_err(&isc->v4l2_dev,
|
"video_register_device failed: %d\n", ret);
|
goto isc_async_complete_err;
|
}
|
|
return 0;
|
|
isc_async_complete_err:
|
mutex_destroy(&isc->lock);
|
return ret;
|
}
|
|
const struct v4l2_async_notifier_operations isc_async_ops = {
|
.bound = isc_async_bound,
|
.unbind = isc_async_unbind,
|
.complete = isc_async_complete,
|
};
|
|
void isc_subdev_cleanup(struct isc_device *isc)
|
{
|
struct isc_subdev_entity *subdev_entity;
|
|
list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
|
v4l2_async_notifier_unregister(&subdev_entity->notifier);
|
v4l2_async_notifier_cleanup(&subdev_entity->notifier);
|
}
|
|
INIT_LIST_HEAD(&isc->subdev_entities);
|
}
|
|
int isc_pipeline_init(struct isc_device *isc)
|
{
|
struct device *dev = isc->dev;
|
struct regmap *regmap = isc->regmap;
|
struct regmap_field *regs;
|
unsigned int i;
|
|
/* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
|
const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = {
|
REG_FIELD(ISC_WB_CTRL, 0, 0),
|
REG_FIELD(ISC_CFA_CTRL, 0, 0),
|
REG_FIELD(ISC_CC_CTRL, 0, 0),
|
REG_FIELD(ISC_GAM_CTRL, 0, 0),
|
REG_FIELD(ISC_GAM_CTRL, 1, 1),
|
REG_FIELD(ISC_GAM_CTRL, 2, 2),
|
REG_FIELD(ISC_GAM_CTRL, 3, 3),
|
REG_FIELD(ISC_CSC_CTRL, 0, 0),
|
REG_FIELD(ISC_CBC_CTRL, 0, 0),
|
REG_FIELD(ISC_SUB422_CTRL, 0, 0),
|
REG_FIELD(ISC_SUB420_CTRL, 0, 0),
|
};
|
|
for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
|
regs = devm_regmap_field_alloc(dev, regmap, regfields[i]);
|
if (IS_ERR(regs))
|
return PTR_ERR(regs);
|
|
isc->pipeline[i] = regs;
|
}
|
|
return 0;
|
}
|
|
/* regmap configuration */
|
#define ATMEL_ISC_REG_MAX 0xbfc
|
const struct regmap_config isc_regmap_config = {
|
.reg_bits = 32,
|
.reg_stride = 4,
|
.val_bits = 32,
|
.max_register = ATMEL_ISC_REG_MAX,
|
};
|
