// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2012 Mentor Graphics Inc.
 * Copyright 2005-2012 Freescale Semiconductor, Inc. All Rights Reserved.
 */
#include <linux/types.h>
#include <linux/bitrev.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <drm/drm_fourcc.h>
#include "ipu-prv.h"

struct ipu_cpmem_word {
        u32 data[5];
        u32 res[3];
};

struct ipu_ch_param {
        struct ipu_cpmem_word word[2];
};

struct ipu_cpmem {
        struct ipu_ch_param __iomem *base;
        u32 module;
        spinlock_t lock;
        int use_count;
        struct ipu_soc *ipu;
};

#define IPU_CPMEM_WORD(word, ofs, size) ((((word) * 160 + (ofs)) << 8) | (size))

#define IPU_FIELD_UBO           IPU_CPMEM_WORD(0, 46, 22)
#define IPU_FIELD_VBO           IPU_CPMEM_WORD(0, 68, 22)
#define IPU_FIELD_IOX           IPU_CPMEM_WORD(0, 90, 4)
#define IPU_FIELD_RDRW          IPU_CPMEM_WORD(0, 94, 1)
#define IPU_FIELD_SO            IPU_CPMEM_WORD(0, 113, 1)
#define IPU_FIELD_SLY           IPU_CPMEM_WORD(1, 102, 14)
#define IPU_FIELD_SLUV          IPU_CPMEM_WORD(1, 128, 14)

#define IPU_FIELD_XV            IPU_CPMEM_WORD(0, 0, 10)
#define IPU_FIELD_YV            IPU_CPMEM_WORD(0, 10, 9)
#define IPU_FIELD_XB            IPU_CPMEM_WORD(0, 19, 13)
#define IPU_FIELD_YB            IPU_CPMEM_WORD(0, 32, 12)
#define IPU_FIELD_NSB_B         IPU_CPMEM_WORD(0, 44, 1)
#define IPU_FIELD_CF            IPU_CPMEM_WORD(0, 45, 1)
#define IPU_FIELD_SX            IPU_CPMEM_WORD(0, 46, 12)
#define IPU_FIELD_SY            IPU_CPMEM_WORD(0, 58, 11)
#define IPU_FIELD_NS            IPU_CPMEM_WORD(0, 69, 10)
#define IPU_FIELD_SDX           IPU_CPMEM_WORD(0, 79, 7)
#define IPU_FIELD_SM            IPU_CPMEM_WORD(0, 86, 10)
#define IPU_FIELD_SCC           IPU_CPMEM_WORD(0, 96, 1)
#define IPU_FIELD_SCE           IPU_CPMEM_WORD(0, 97, 1)
#define IPU_FIELD_SDY           IPU_CPMEM_WORD(0, 98, 7)
#define IPU_FIELD_SDRX          IPU_CPMEM_WORD(0, 105, 1)
#define IPU_FIELD_SDRY          IPU_CPMEM_WORD(0, 106, 1)
#define IPU_FIELD_BPP           IPU_CPMEM_WORD(0, 107, 3)
#define IPU_FIELD_DEC_SEL       IPU_CPMEM_WORD(0, 110, 2)
#define IPU_FIELD_DIM           IPU_CPMEM_WORD(0, 112, 1)
#define IPU_FIELD_BNDM          IPU_CPMEM_WORD(0, 114, 3)
#define IPU_FIELD_BM            IPU_CPMEM_WORD(0, 117, 2)
#define IPU_FIELD_ROT           IPU_CPMEM_WORD(0, 119, 1)
#define IPU_FIELD_ROT_HF_VF     IPU_CPMEM_WORD(0, 119, 3)
#define IPU_FIELD_HF            IPU_CPMEM_WORD(0, 120, 1)
#define IPU_FIELD_VF            IPU_CPMEM_WORD(0, 121, 1)
#define IPU_FIELD_THE           IPU_CPMEM_WORD(0, 122, 1)
#define IPU_FIELD_CAP           IPU_CPMEM_WORD(0, 123, 1)
#define IPU_FIELD_CAE           IPU_CPMEM_WORD(0, 124, 1)
#define IPU_FIELD_FW            IPU_CPMEM_WORD(0, 125, 13)
#define IPU_FIELD_FH            IPU_CPMEM_WORD(0, 138, 12)
#define IPU_FIELD_EBA0          IPU_CPMEM_WORD(1, 0, 29)
#define IPU_FIELD_EBA1          IPU_CPMEM_WORD(1, 29, 29)
#define IPU_FIELD_ILO           IPU_CPMEM_WORD(1, 58, 20)
#define IPU_FIELD_NPB           IPU_CPMEM_WORD(1, 78, 7)
#define IPU_FIELD_PFS           IPU_CPMEM_WORD(1, 85, 4)
#define IPU_FIELD_ALU           IPU_CPMEM_WORD(1, 89, 1)
#define IPU_FIELD_ALBM          IPU_CPMEM_WORD(1, 90, 3)
#define IPU_FIELD_ID            IPU_CPMEM_WORD(1, 93, 2)
#define IPU_FIELD_TH            IPU_CPMEM_WORD(1, 95, 7)
#define IPU_FIELD_SL            IPU_CPMEM_WORD(1, 102, 14)
#define IPU_FIELD_WID0          IPU_CPMEM_WORD(1, 116, 3)
#define IPU_FIELD_WID1          IPU_CPMEM_WORD(1, 119, 3)
#define IPU_FIELD_WID2          IPU_CPMEM_WORD(1, 122, 3)
#define IPU_FIELD_WID3          IPU_CPMEM_WORD(1, 125, 3)
#define IPU_FIELD_OFS0          IPU_CPMEM_WORD(1, 128, 5)
#define IPU_FIELD_OFS1          IPU_CPMEM_WORD(1, 133, 5)
#define IPU_FIELD_OFS2          IPU_CPMEM_WORD(1, 138, 5)
#define IPU_FIELD_OFS3          IPU_CPMEM_WORD(1, 143, 5)
#define IPU_FIELD_SXYS          IPU_CPMEM_WORD(1, 148, 1)
#define IPU_FIELD_CRE           IPU_CPMEM_WORD(1, 149, 1)
#define IPU_FIELD_DEC_SEL2      IPU_CPMEM_WORD(1, 150, 1)

static inline struct ipu_ch_param __iomem *
ipu_get_cpmem(struct ipuv3_channel *ch)
{
        struct ipu_cpmem *cpmem = ch->ipu->cpmem_priv;

        return cpmem->base + ch->num;
}

static void ipu_ch_param_write_field(struct ipuv3_channel *ch, u32 wbs, u32 v)
{
        struct ipu_ch_param __iomem *base = ipu_get_cpmem(ch);
        u32 bit = (wbs >> 8) % 160;
        u32 size = wbs & 0xff;
        u32 word = (wbs >> 8) / 160;
        u32 i = bit / 32;
        u32 ofs = bit % 32;
        u32 mask = (1 << size) - 1;
        u32 val;

        pr_debug("%s %d %d %d\n", __func__, word, bit , size);

        val = readl(&base->word[word].data[i]);
        val &= ~(mask << ofs);
        val |= v << ofs;
        writel(val, &base->word[word].data[i]);

        if ((bit + size - 1) / 32 > i) {
                val = readl(&base->word[word].data[i + 1]);
                val &= ~(mask >> (ofs ? (32 - ofs) : 0));
                val |= v >> (ofs ? (32 - ofs) : 0);
                writel(val, &base->word[word].data[i + 1]);
        }
}

static u32 ipu_ch_param_read_field(struct ipuv3_channel *ch, u32 wbs)
{
        struct ipu_ch_param __iomem *base = ipu_get_cpmem(ch);
        u32 bit = (wbs >> 8) % 160;
        u32 size = wbs & 0xff;
        u32 word = (wbs >> 8) / 160;
        u32 i = bit / 32;
        u32 ofs = bit % 32;
        u32 mask = (1 << size) - 1;
        u32 val = 0;

        pr_debug("%s %d %d %d\n", __func__, word, bit , size);

        val = (readl(&base->word[word].data[i]) >> ofs) & mask;

        if ((bit + size - 1) / 32 > i) {
                u32 tmp;

                tmp = readl(&base->word[word].data[i + 1]);
                tmp &= mask >> (ofs ? (32 - ofs) : 0);
                val |= tmp << (ofs ? (32 - ofs) : 0);
        }

        return val;
}

/*
 * The V4L2 spec defines packed RGB formats in memory byte order, which from
 * point of view of the IPU corresponds to little-endian words with the first
 * component in the least significant bits.
 * The DRM pixel formats and IPU internal representation are ordered the other
 * way around, with the first named component ordered at the most significant
 * bits. Further, V4L2 formats are not well defined:
 *     https://linuxtv.org/downloads/v4l-dvb-apis/packed-rgb.html
 * We choose the interpretation which matches GStreamer behavior.
 */
static int v4l2_pix_fmt_to_drm_fourcc(u32 pixelformat)
{
        switch (pixelformat) {
        case V4L2_PIX_FMT_RGB565:
                /*
                 * Here we choose the 'corrected' interpretation of RGBP, a
                 * little-endian 16-bit word with the red component at the most
                 * significant bits:
                 * g[2:0]b[4:0] r[4:0]g[5:3] <=> [16:0] R:G:B
                 */
                return DRM_FORMAT_RGB565;
        case V4L2_PIX_FMT_BGR24:
                /* B G R <=> [24:0] R:G:B */
                return DRM_FORMAT_RGB888;
        case V4L2_PIX_FMT_RGB24:
                /* R G B <=> [24:0] B:G:R */
                return DRM_FORMAT_BGR888;
        case V4L2_PIX_FMT_BGR32:
                /* B G R A <=> [32:0] A:B:G:R */
                return DRM_FORMAT_XRGB8888;
        case V4L2_PIX_FMT_RGB32:
                /* R G B A <=> [32:0] A:B:G:R */
                return DRM_FORMAT_XBGR8888;
        case V4L2_PIX_FMT_ABGR32:
                /* B G R A <=> [32:0] A:R:G:B */
                return DRM_FORMAT_ARGB8888;
        case V4L2_PIX_FMT_XBGR32:
                /* B G R X <=> [32:0] X:R:G:B */
                return DRM_FORMAT_XRGB8888;
        case V4L2_PIX_FMT_BGRA32:
                /* A B G R <=> [32:0] R:G:B:A */
                return DRM_FORMAT_RGBA8888;
        case V4L2_PIX_FMT_BGRX32:
                /* X B G R <=> [32:0] R:G:B:X */
                return DRM_FORMAT_RGBX8888;
        case V4L2_PIX_FMT_RGBA32:
                /* R G B A <=> [32:0] A:B:G:R */
                return DRM_FORMAT_ABGR8888;
        case V4L2_PIX_FMT_RGBX32:
                /* R G B X <=> [32:0] X:B:G:R */
                return DRM_FORMAT_XBGR8888;
        case V4L2_PIX_FMT_ARGB32:
                /* A R G B <=> [32:0] B:G:R:A */
                return DRM_FORMAT_BGRA8888;
        case V4L2_PIX_FMT_XRGB32:
                /* X R G B <=> [32:0] B:G:R:X */
                return DRM_FORMAT_BGRX8888;
        case V4L2_PIX_FMT_UYVY:
                return DRM_FORMAT_UYVY;
        case V4L2_PIX_FMT_YUYV:
                return DRM_FORMAT_YUYV;
        case V4L2_PIX_FMT_YUV420:
                return DRM_FORMAT_YUV420;
        case V4L2_PIX_FMT_YUV422P:
                return DRM_FORMAT_YUV422;
        case V4L2_PIX_FMT_YVU420:
                return DRM_FORMAT_YVU420;
        case V4L2_PIX_FMT_NV12:
                return DRM_FORMAT_NV12;
        case V4L2_PIX_FMT_NV16:
                return DRM_FORMAT_NV16;
        }

        return -EINVAL;
}

void ipu_cpmem_zero(struct ipuv3_channel *ch)
{
        struct ipu_ch_param __iomem *p = ipu_get_cpmem(ch);
        void __iomem *base = p;
        int i;

        for (i = 0; i < sizeof(*p) / sizeof(u32); i++)
                writel(0, base + i * sizeof(u32));
}
EXPORT_SYMBOL_GPL(ipu_cpmem_zero);

void ipu_cpmem_set_resolution(struct ipuv3_channel *ch, int xres, int yres)
{
        ipu_ch_param_write_field(ch, IPU_FIELD_FW, xres - 1);
        ipu_ch_param_write_field(ch, IPU_FIELD_FH, yres - 1);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_resolution);

void ipu_cpmem_skip_odd_chroma_rows(struct ipuv3_channel *ch)
{
        ipu_ch_param_write_field(ch, IPU_FIELD_RDRW, 1);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_skip_odd_chroma_rows);

void ipu_cpmem_set_stride(struct ipuv3_channel *ch, int stride)
{
        ipu_ch_param_write_field(ch, IPU_FIELD_SLY, stride - 1);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_stride);

void ipu_cpmem_set_high_priority(struct ipuv3_channel *ch)
{
        struct ipu_soc *ipu = ch->ipu;
        u32 val;

        if (ipu->ipu_type == IPUV3EX)
                ipu_ch_param_write_field(ch, IPU_FIELD_ID, 1);

        val = ipu_idmac_read(ipu, IDMAC_CHA_PRI(ch->num));
        val |= 1 << (ch->num % 32);
        ipu_idmac_write(ipu, val, IDMAC_CHA_PRI(ch->num));
};
EXPORT_SYMBOL_GPL(ipu_cpmem_set_high_priority);

void ipu_cpmem_set_buffer(struct ipuv3_channel *ch, int bufnum, dma_addr_t buf)
{
        WARN_ON_ONCE(buf & 0x7);

        if (bufnum)
                ipu_ch_param_write_field(ch, IPU_FIELD_EBA1, buf >> 3);
        else
                ipu_ch_param_write_field(ch, IPU_FIELD_EBA0, buf >> 3);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_buffer);

void ipu_cpmem_set_uv_offset(struct ipuv3_channel *ch, u32 u_off, u32 v_off)
{
        WARN_ON_ONCE((u_off & 0x7) || (v_off & 0x7));

        ipu_ch_param_write_field(ch, IPU_FIELD_UBO, u_off / 8);
        ipu_ch_param_write_field(ch, IPU_FIELD_VBO, v_off / 8);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_uv_offset);

void ipu_cpmem_interlaced_scan(struct ipuv3_channel *ch, int stride,
                               u32 pixelformat)
{
        u32 ilo, sly, sluv;

        if (stride < 0) {
                stride = -stride;
                ilo = 0x100000 - (stride / 8);
        } else {
                ilo = stride / 8;
        }

        sly = (stride * 2) - 1;

        switch (pixelformat) {
        case V4L2_PIX_FMT_YUV420:
        case V4L2_PIX_FMT_YVU420:
                sluv = stride / 2 - 1;
                break;
        case V4L2_PIX_FMT_NV12:
                sluv = stride - 1;
                break;
        case V4L2_PIX_FMT_YUV422P:
                sluv = stride - 1;
                break;
        case V4L2_PIX_FMT_NV16:
                sluv = stride * 2 - 1;
                break;
        default:
                sluv = 0;
                break;
        }

        ipu_ch_param_write_field(ch, IPU_FIELD_SO, 1);
        ipu_ch_param_write_field(ch, IPU_FIELD_ILO, ilo);
        ipu_ch_param_write_field(ch, IPU_FIELD_SLY, sly);
        if (sluv)
                ipu_ch_param_write_field(ch, IPU_FIELD_SLUV, sluv);
};
EXPORT_SYMBOL_GPL(ipu_cpmem_interlaced_scan);

void ipu_cpmem_set_axi_id(struct ipuv3_channel *ch, u32 id)
{
        id &= 0x3;
        ipu_ch_param_write_field(ch, IPU_FIELD_ID, id);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_axi_id);

int ipu_cpmem_get_burstsize(struct ipuv3_channel *ch)
{
        return ipu_ch_param_read_field(ch, IPU_FIELD_NPB) + 1;
}
EXPORT_SYMBOL_GPL(ipu_cpmem_get_burstsize);

void ipu_cpmem_set_burstsize(struct ipuv3_channel *ch, int burstsize)
{
        ipu_ch_param_write_field(ch, IPU_FIELD_NPB, burstsize - 1);
};
EXPORT_SYMBOL_GPL(ipu_cpmem_set_burstsize);

void ipu_cpmem_set_block_mode(struct ipuv3_channel *ch)
{
        ipu_ch_param_write_field(ch, IPU_FIELD_BM, 1);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_block_mode);

void ipu_cpmem_set_rotation(struct ipuv3_channel *ch,
                            enum ipu_rotate_mode rot)
{
        u32 temp_rot = bitrev8(rot) >> 5;

        ipu_ch_param_write_field(ch, IPU_FIELD_ROT_HF_VF, temp_rot);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_rotation);

int ipu_cpmem_set_format_rgb(struct ipuv3_channel *ch,
                             const struct ipu_rgb *rgb)
{
        int bpp = 0, npb = 0, ro, go, bo, to;

        ro = rgb->bits_per_pixel - rgb->red.length - rgb->red.offset;
        go = rgb->bits_per_pixel - rgb->green.length - rgb->green.offset;
        bo = rgb->bits_per_pixel - rgb->blue.length - rgb->blue.offset;
        to = rgb->bits_per_pixel - rgb->transp.length - rgb->transp.offset;

        ipu_ch_param_write_field(ch, IPU_FIELD_WID0, rgb->red.length - 1);
        ipu_ch_param_write_field(ch, IPU_FIELD_OFS0, ro);
        ipu_ch_param_write_field(ch, IPU_FIELD_WID1, rgb->green.length - 1);
        ipu_ch_param_write_field(ch, IPU_FIELD_OFS1, go);
        ipu_ch_param_write_field(ch, IPU_FIELD_WID2, rgb->blue.length - 1);
        ipu_ch_param_write_field(ch, IPU_FIELD_OFS2, bo);

        if (rgb->transp.length) {
                ipu_ch_param_write_field(ch, IPU_FIELD_WID3,
                                rgb->transp.length - 1);
                ipu_ch_param_write_field(ch, IPU_FIELD_OFS3, to);
        } else {
                ipu_ch_param_write_field(ch, IPU_FIELD_WID3, 7);
                ipu_ch_param_write_field(ch, IPU_FIELD_OFS3,
                                rgb->bits_per_pixel);
        }

        switch (rgb->bits_per_pixel) {
        case 32:
                bpp = 0;
                npb = 15;
                break;
        case 24:
                bpp = 1;
                npb = 19;
                break;
        case 16:
                bpp = 3;
                npb = 31;
                break;
        case 8:
                bpp = 5;
                npb = 63;
                break;
        default:
                return -EINVAL;
        }
        ipu_ch_param_write_field(ch, IPU_FIELD_BPP, bpp);
        ipu_ch_param_write_field(ch, IPU_FIELD_NPB, npb);
        ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 7); /* rgb mode */

        return 0;
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_format_rgb);

int ipu_cpmem_set_format_passthrough(struct ipuv3_channel *ch, int width)
{
        int bpp = 0, npb = 0;

        switch (width) {
        case 32:
                bpp = 0;
                npb = 15;
                break;
        case 24:
                bpp = 1;
                npb = 19;
                break;
        case 16:
                bpp = 3;
                npb = 31;
                break;
        case 8:
                bpp = 5;
                npb = 63;
                break;
        default:
                return -EINVAL;
        }

        ipu_ch_param_write_field(ch, IPU_FIELD_BPP, bpp);
        ipu_ch_param_write_field(ch, IPU_FIELD_NPB, npb);
        ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 6); /* raw mode */

        return 0;
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_format_passthrough);

void ipu_cpmem_set_yuv_interleaved(struct ipuv3_channel *ch, u32 pixel_format)
{
        switch (pixel_format) {
        case V4L2_PIX_FMT_UYVY:
                ipu_ch_param_write_field(ch, IPU_FIELD_BPP, 3); /* bits/pixel */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 0xA);/* pix fmt */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);/* burst size */
                break;
        case V4L2_PIX_FMT_YUYV:
                ipu_ch_param_write_field(ch, IPU_FIELD_BPP, 3); /* bits/pixel */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 0x8);/* pix fmt */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);/* burst size */
                break;
        }
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_yuv_interleaved);

void ipu_cpmem_set_yuv_planar_full(struct ipuv3_channel *ch,
                                   unsigned int uv_stride,
                                   unsigned int u_offset, unsigned int v_offset)
{
        WARN_ON_ONCE((u_offset & 0x7) || (v_offset & 0x7));

        ipu_ch_param_write_field(ch, IPU_FIELD_SLUV, uv_stride - 1);
        ipu_ch_param_write_field(ch, IPU_FIELD_UBO, u_offset / 8);
        ipu_ch_param_write_field(ch, IPU_FIELD_VBO, v_offset / 8);
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_yuv_planar_full);

static const struct ipu_rgb def_xrgb_32 = {
        .red    = { .offset = 16, .length = 8, },
        .green  = { .offset =  8, .length = 8, },
        .blue   = { .offset =  0, .length = 8, },
        .transp = { .offset = 24, .length = 8, },
        .bits_per_pixel = 32,
};

static const struct ipu_rgb def_xbgr_32 = {
        .red    = { .offset =  0, .length = 8, },
        .green  = { .offset =  8, .length = 8, },
        .blue   = { .offset = 16, .length = 8, },
        .transp = { .offset = 24, .length = 8, },
        .bits_per_pixel = 32,
};

static const struct ipu_rgb def_rgbx_32 = {
        .red    = { .offset = 24, .length = 8, },
        .green  = { .offset = 16, .length = 8, },
        .blue   = { .offset =  8, .length = 8, },
        .transp = { .offset =  0, .length = 8, },
        .bits_per_pixel = 32,
};

static const struct ipu_rgb def_bgrx_32 = {
        .red    = { .offset =  8, .length = 8, },
        .green  = { .offset = 16, .length = 8, },
        .blue   = { .offset = 24, .length = 8, },
        .transp = { .offset =  0, .length = 8, },
        .bits_per_pixel = 32,
};

static const struct ipu_rgb def_rgb_24 = {
        .red    = { .offset = 16, .length = 8, },
        .green  = { .offset =  8, .length = 8, },
        .blue   = { .offset =  0, .length = 8, },
        .transp = { .offset =  0, .length = 0, },
        .bits_per_pixel = 24,
};

static const struct ipu_rgb def_bgr_24 = {
        .red    = { .offset =  0, .length = 8, },
        .green  = { .offset =  8, .length = 8, },
        .blue   = { .offset = 16, .length = 8, },
        .transp = { .offset =  0, .length = 0, },
        .bits_per_pixel = 24,
};

static const struct ipu_rgb def_rgb_16 = {
        .red    = { .offset = 11, .length = 5, },
        .green  = { .offset =  5, .length = 6, },
        .blue   = { .offset =  0, .length = 5, },
        .transp = { .offset =  0, .length = 0, },
        .bits_per_pixel = 16,
};

static const struct ipu_rgb def_bgr_16 = {
        .red    = { .offset =  0, .length = 5, },
        .green  = { .offset =  5, .length = 6, },
        .blue   = { .offset = 11, .length = 5, },
        .transp = { .offset =  0, .length = 0, },
        .bits_per_pixel = 16,
};

static const struct ipu_rgb def_argb_16 = {
        .red    = { .offset = 10, .length = 5, },
        .green  = { .offset =  5, .length = 5, },
        .blue   = { .offset =  0, .length = 5, },
        .transp = { .offset = 15, .length = 1, },
        .bits_per_pixel = 16,
};

static const struct ipu_rgb def_argb_16_4444 = {
        .red    = { .offset =  8, .length = 4, },
        .green  = { .offset =  4, .length = 4, },
        .blue   = { .offset =  0, .length = 4, },
        .transp = { .offset = 12, .length = 4, },
        .bits_per_pixel = 16,
};

static const struct ipu_rgb def_abgr_16 = {
        .red    = { .offset =  0, .length = 5, },
        .green  = { .offset =  5, .length = 5, },
        .blue   = { .offset = 10, .length = 5, },
        .transp = { .offset = 15, .length = 1, },
        .bits_per_pixel = 16,
};

static const struct ipu_rgb def_rgba_16 = {
        .red    = { .offset = 11, .length = 5, },
        .green  = { .offset =  6, .length = 5, },
        .blue   = { .offset =  1, .length = 5, },
        .transp = { .offset =  0, .length = 1, },
        .bits_per_pixel = 16,
};

static const struct ipu_rgb def_bgra_16 = {
        .red    = { .offset =  1, .length = 5, },
        .green  = { .offset =  6, .length = 5, },
        .blue   = { .offset = 11, .length = 5, },
        .transp = { .offset =  0, .length = 1, },
        .bits_per_pixel = 16,
};

#define Y_OFFSET(pix, x, y)     ((x) + pix->width * (y))
#define U_OFFSET(pix, x, y)     ((pix->width * pix->height) +           \
                                 (pix->width * ((y) / 2) / 2) + (x) / 2)
#define V_OFFSET(pix, x, y)     ((pix->width * pix->height) +           \
                                 (pix->width * pix->height / 4) +       \
                                 (pix->width * ((y) / 2) / 2) + (x) / 2)
#define U2_OFFSET(pix, x, y)    ((pix->width * pix->height) +           \
                                 (pix->width * (y) / 2) + (x) / 2)
#define V2_OFFSET(pix, x, y)    ((pix->width * pix->height) +           \
                                 (pix->width * pix->height / 2) +       \
                                 (pix->width * (y) / 2) + (x) / 2)
#define UV_OFFSET(pix, x, y)    ((pix->width * pix->height) +   \
                                 (pix->width * ((y) / 2)) + (x))
#define UV2_OFFSET(pix, x, y)   ((pix->width * pix->height) +   \
                                 (pix->width * y) + (x))

#define NUM_ALPHA_CHANNELS      7

/* See Table 37-12. Alpha channels mapping. */
static int ipu_channel_albm(int ch_num)
{
        switch (ch_num) {
        case IPUV3_CHANNEL_G_MEM_IC_PRP_VF:     return 0;
        case IPUV3_CHANNEL_G_MEM_IC_PP:         return 1;
        case IPUV3_CHANNEL_MEM_FG_SYNC:         return 2;
        case IPUV3_CHANNEL_MEM_FG_ASYNC:        return 3;
        case IPUV3_CHANNEL_MEM_BG_SYNC:         return 4;
        case IPUV3_CHANNEL_MEM_BG_ASYNC:        return 5;
        case IPUV3_CHANNEL_MEM_VDI_PLANE1_COMB: return 6;
        default:
                return -EINVAL;
        }
}

static void ipu_cpmem_set_separate_alpha(struct ipuv3_channel *ch)
{
        struct ipu_soc *ipu = ch->ipu;
        int albm;
        u32 val;

        albm = ipu_channel_albm(ch->num);
        if (albm < 0)
                return;

        ipu_ch_param_write_field(ch, IPU_FIELD_ALU, 1);
        ipu_ch_param_write_field(ch, IPU_FIELD_ALBM, albm);
        ipu_ch_param_write_field(ch, IPU_FIELD_CRE, 1);

        val = ipu_idmac_read(ipu, IDMAC_SEP_ALPHA);
        val |= BIT(ch->num);
        ipu_idmac_write(ipu, val, IDMAC_SEP_ALPHA);
}

int ipu_cpmem_set_fmt(struct ipuv3_channel *ch, u32 drm_fourcc)
{
        switch (drm_fourcc) {
        case DRM_FORMAT_YUV420:
        case DRM_FORMAT_YVU420:
                /* pix format */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 2);
                /* burst size */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);
                break;
        case DRM_FORMAT_YUV422:
        case DRM_FORMAT_YVU422:
                /* pix format */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 1);
                /* burst size */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);
                break;
        case DRM_FORMAT_YUV444:
        case DRM_FORMAT_YVU444:
                /* pix format */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 0);
                /* burst size */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);
                break;
        case DRM_FORMAT_NV12:
                /* pix format */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 4);
                /* burst size */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);
                break;
        case DRM_FORMAT_NV16:
                /* pix format */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 3);
                /* burst size */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);
                break;
        case DRM_FORMAT_UYVY:
                /* bits/pixel */
                ipu_ch_param_write_field(ch, IPU_FIELD_BPP, 3);
                /* pix format */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 0xA);
                /* burst size */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);
                break;
        case DRM_FORMAT_YUYV:
                /* bits/pixel */
                ipu_ch_param_write_field(ch, IPU_FIELD_BPP, 3);
                /* pix format */
                ipu_ch_param_write_field(ch, IPU_FIELD_PFS, 0x8);
                /* burst size */
                ipu_ch_param_write_field(ch, IPU_FIELD_NPB, 31);
                break;
        case DRM_FORMAT_ABGR8888:
        case DRM_FORMAT_XBGR8888:
                ipu_cpmem_set_format_rgb(ch, &def_xbgr_32);
                break;
        case DRM_FORMAT_ARGB8888:
        case DRM_FORMAT_XRGB8888:
                ipu_cpmem_set_format_rgb(ch, &def_xrgb_32);
                break;
        case DRM_FORMAT_RGBA8888:
        case DRM_FORMAT_RGBX8888:
        case DRM_FORMAT_RGBX8888_A8:
                ipu_cpmem_set_format_rgb(ch, &def_rgbx_32);
                break;
        case DRM_FORMAT_BGRA8888:
        case DRM_FORMAT_BGRX8888:
        case DRM_FORMAT_BGRX8888_A8:
                ipu_cpmem_set_format_rgb(ch, &def_bgrx_32);
                break;
        case DRM_FORMAT_BGR888:
        case DRM_FORMAT_BGR888_A8:
                ipu_cpmem_set_format_rgb(ch, &def_bgr_24);
                break;
        case DRM_FORMAT_RGB888:
        case DRM_FORMAT_RGB888_A8:
                ipu_cpmem_set_format_rgb(ch, &def_rgb_24);
                break;
        case DRM_FORMAT_RGB565:
        case DRM_FORMAT_RGB565_A8:
                ipu_cpmem_set_format_rgb(ch, &def_rgb_16);
                break;
        case DRM_FORMAT_BGR565:
        case DRM_FORMAT_BGR565_A8:
                ipu_cpmem_set_format_rgb(ch, &def_bgr_16);
                break;
        case DRM_FORMAT_ARGB1555:
                ipu_cpmem_set_format_rgb(ch, &def_argb_16);
                break;
        case DRM_FORMAT_ABGR1555:
                ipu_cpmem_set_format_rgb(ch, &def_abgr_16);
                break;
        case DRM_FORMAT_RGBA5551:
                ipu_cpmem_set_format_rgb(ch, &def_rgba_16);
                break;
        case DRM_FORMAT_BGRA5551:
                ipu_cpmem_set_format_rgb(ch, &def_bgra_16);
                break;
        case DRM_FORMAT_ARGB4444:
                ipu_cpmem_set_format_rgb(ch, &def_argb_16_4444);
                break;
        default:
                return -EINVAL;
        }

        switch (drm_fourcc) {
        case DRM_FORMAT_RGB565_A8:
        case DRM_FORMAT_BGR565_A8:
        case DRM_FORMAT_RGB888_A8:
        case DRM_FORMAT_BGR888_A8:
        case DRM_FORMAT_RGBX8888_A8:
        case DRM_FORMAT_BGRX8888_A8:
                ipu_ch_param_write_field(ch, IPU_FIELD_WID3, 7);
                ipu_cpmem_set_separate_alpha(ch);
                break;
        default:
                break;
        }

        return 0;
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_fmt);

int ipu_cpmem_set_image(struct ipuv3_channel *ch, struct ipu_image *image)
{
        struct v4l2_pix_format *pix = &image->pix;
        int offset, u_offset, v_offset;
        int ret = 0;

        pr_debug("%s: resolution: %dx%d stride: %d\n",
                 __func__, pix->width, pix->height,
                 pix->bytesperline);

        ipu_cpmem_set_resolution(ch, image->rect.width, image->rect.height);
        ipu_cpmem_set_stride(ch, pix->bytesperline);

        ipu_cpmem_set_fmt(ch, v4l2_pix_fmt_to_drm_fourcc(pix->pixelformat));

        switch (pix->pixelformat) {
        case V4L2_PIX_FMT_YUV420:
                offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
                u_offset = image->u_offset ?
                        image->u_offset : U_OFFSET(pix, image->rect.left,
                                                   image->rect.top) - offset;
                v_offset = image->v_offset ?
                        image->v_offset : V_OFFSET(pix, image->rect.left,
                                                   image->rect.top) - offset;

                ipu_cpmem_set_yuv_planar_full(ch, pix->bytesperline / 2,
                                              u_offset, v_offset);
                break;
        case V4L2_PIX_FMT_YVU420:
                offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
                u_offset = image->u_offset ?
                        image->u_offset : V_OFFSET(pix, image->rect.left,
                                                   image->rect.top) - offset;
                v_offset = image->v_offset ?
                        image->v_offset : U_OFFSET(pix, image->rect.left,
                                                   image->rect.top) - offset;

                ipu_cpmem_set_yuv_planar_full(ch, pix->bytesperline / 2,
                                              u_offset, v_offset);
                break;
        case V4L2_PIX_FMT_YUV422P:
                offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
                u_offset = image->u_offset ?
                        image->u_offset : U2_OFFSET(pix, image->rect.left,
                                                    image->rect.top) - offset;
                v_offset = image->v_offset ?
                        image->v_offset : V2_OFFSET(pix, image->rect.left,
                                                    image->rect.top) - offset;

                ipu_cpmem_set_yuv_planar_full(ch, pix->bytesperline / 2,
                                              u_offset, v_offset);
                break;
        case V4L2_PIX_FMT_NV12:
                offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
                u_offset = image->u_offset ?
                        image->u_offset : UV_OFFSET(pix, image->rect.left,
                                                    image->rect.top) - offset;
                v_offset = image->v_offset ? image->v_offset : 0;

                ipu_cpmem_set_yuv_planar_full(ch, pix->bytesperline,
                                              u_offset, v_offset);
                break;
        case V4L2_PIX_FMT_NV16:
                offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
                u_offset = image->u_offset ?
                        image->u_offset : UV2_OFFSET(pix, image->rect.left,
                                                     image->rect.top) - offset;
                v_offset = image->v_offset ? image->v_offset : 0;

                ipu_cpmem_set_yuv_planar_full(ch, pix->bytesperline,
                                              u_offset, v_offset);
                break;
        case V4L2_PIX_FMT_UYVY:
        case V4L2_PIX_FMT_YUYV:
        case V4L2_PIX_FMT_RGB565:
                offset = image->rect.left * 2 +
                        image->rect.top * pix->bytesperline;
                break;
        case V4L2_PIX_FMT_RGB32:
        case V4L2_PIX_FMT_BGR32:
        case V4L2_PIX_FMT_ABGR32:
        case V4L2_PIX_FMT_XBGR32:
        case V4L2_PIX_FMT_BGRA32:
        case V4L2_PIX_FMT_BGRX32:
        case V4L2_PIX_FMT_RGBA32:
        case V4L2_PIX_FMT_RGBX32:
        case V4L2_PIX_FMT_ARGB32:
        case V4L2_PIX_FMT_XRGB32:
                offset = image->rect.left * 4 +
                        image->rect.top * pix->bytesperline;
                break;
        case V4L2_PIX_FMT_RGB24:
        case V4L2_PIX_FMT_BGR24:
                offset = image->rect.left * 3 +
                        image->rect.top * pix->bytesperline;
                break;
        case V4L2_PIX_FMT_SBGGR8:
        case V4L2_PIX_FMT_SGBRG8:
        case V4L2_PIX_FMT_SGRBG8:
        case V4L2_PIX_FMT_SRGGB8:
        case V4L2_PIX_FMT_GREY:
                offset = image->rect.left + image->rect.top * pix->bytesperline;
                break;
        case V4L2_PIX_FMT_SBGGR16:
        case V4L2_PIX_FMT_SGBRG16:
        case V4L2_PIX_FMT_SGRBG16:
        case V4L2_PIX_FMT_SRGGB16:
        case V4L2_PIX_FMT_Y16:
                offset = image->rect.left * 2 +
                         image->rect.top * pix->bytesperline;
                break;
        default:
                /* This should not happen */
                WARN_ON(1);
                offset = 0;
                ret = -EINVAL;
        }

        ipu_cpmem_set_buffer(ch, 0, image->phys0 + offset);
        ipu_cpmem_set_buffer(ch, 1, image->phys1 + offset);

        return ret;
}
EXPORT_SYMBOL_GPL(ipu_cpmem_set_image);

void ipu_cpmem_dump(struct ipuv3_channel *ch)
{
        struct ipu_ch_param __iomem *p = ipu_get_cpmem(ch);
        struct ipu_soc *ipu = ch->ipu;
        int chno = ch->num;

        dev_dbg(ipu->dev, "ch %d word 0 - %08X %08X %08X %08X %08X\n", chno,
                readl(&p->word[0].data[0]),
                readl(&p->word[0].data[1]),
                readl(&p->word[0].data[2]),
                readl(&p->word[0].data[3]),
                readl(&p->word[0].data[4]));
        dev_dbg(ipu->dev, "ch %d word 1 - %08X %08X %08X %08X %08X\n", chno,
                readl(&p->word[1].data[0]),
                readl(&p->word[1].data[1]),
                readl(&p->word[1].data[2]),
                readl(&p->word[1].data[3]),
                readl(&p->word[1].data[4]));
        dev_dbg(ipu->dev, "PFS 0x%x, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_PFS));
        dev_dbg(ipu->dev, "BPP 0x%x, ",
                ipu_ch_param_read_field(ch, IPU_FIELD_BPP));
        dev_dbg(ipu->dev, "NPB 0x%x\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_NPB));

        dev_dbg(ipu->dev, "FW %d, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_FW));
        dev_dbg(ipu->dev, "FH %d, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_FH));
        dev_dbg(ipu->dev, "EBA0 0x%x\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_EBA0) << 3);
        dev_dbg(ipu->dev, "EBA1 0x%x\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_EBA1) << 3);
        dev_dbg(ipu->dev, "Stride %d\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_SL));
        dev_dbg(ipu->dev, "scan_order %d\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_SO));
        dev_dbg(ipu->dev, "uv_stride %d\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_SLUV));
        dev_dbg(ipu->dev, "u_offset 0x%x\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_UBO) << 3);
        dev_dbg(ipu->dev, "v_offset 0x%x\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_VBO) << 3);

        dev_dbg(ipu->dev, "Width0 %d+1, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_WID0));
        dev_dbg(ipu->dev, "Width1 %d+1, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_WID1));
        dev_dbg(ipu->dev, "Width2 %d+1, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_WID2));
        dev_dbg(ipu->dev, "Width3 %d+1, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_WID3));
        dev_dbg(ipu->dev, "Offset0 %d, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_OFS0));
        dev_dbg(ipu->dev, "Offset1 %d, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_OFS1));
        dev_dbg(ipu->dev, "Offset2 %d, ",
                 ipu_ch_param_read_field(ch, IPU_FIELD_OFS2));
        dev_dbg(ipu->dev, "Offset3 %d\n",
                 ipu_ch_param_read_field(ch, IPU_FIELD_OFS3));
}
EXPORT_SYMBOL_GPL(ipu_cpmem_dump);

int ipu_cpmem_init(struct ipu_soc *ipu, struct device *dev, unsigned long base)
{
        struct ipu_cpmem *cpmem;

        cpmem = devm_kzalloc(dev, sizeof(*cpmem), GFP_KERNEL);
        if (!cpmem)
                return -ENOMEM;

        ipu->cpmem_priv = cpmem;

        spin_lock_init(&cpmem->lock);
        cpmem->base = devm_ioremap(dev, base, SZ_128K);
        if (!cpmem->base)
                return -ENOMEM;

        dev_dbg(dev, "CPMEM base: 0x%08lx remapped to %p\n",
                base, cpmem->base);
        cpmem->ipu = ipu;

        return 0;
}

void ipu_cpmem_exit(struct ipu_soc *ipu)
{
}