/* drivers/video/msm/mdp_ppp.c
 *
 * Copyright (C) 2007 QUALCOMM Incorporated
 * Copyright (C) 2007 Google Incorporated
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */
#include <linux/fb.h>
#include <linux/file.h>
#include <linux/delay.h>
#include <linux/msm_mdp.h>
#include <linux/platform_data/video-msm_fb.h>

#include "mdp_hw.h"
#include "mdp_scale_tables.h"

#define DLOG(x...) do {} while (0)

#define MDP_DOWNSCALE_BLUR (MDP_DOWNSCALE_MAX + 1)
static int downscale_y_table = MDP_DOWNSCALE_MAX;
static int downscale_x_table = MDP_DOWNSCALE_MAX;

struct mdp_regs {
        uint32_t src0;
        uint32_t src1;
        uint32_t dst0;
        uint32_t dst1;
        uint32_t src_cfg;
        uint32_t dst_cfg;
        uint32_t src_pack;
        uint32_t dst_pack;
        uint32_t src_rect;
        uint32_t dst_rect;
        uint32_t src_ystride;
        uint32_t dst_ystride;
        uint32_t op;
        uint32_t src_bpp;
        uint32_t dst_bpp;
        uint32_t edge;
        uint32_t phasex_init;
        uint32_t phasey_init;
        uint32_t phasex_step;
        uint32_t phasey_step;
};

static uint32_t pack_pattern[] = {
        PPP_ARRAY0(PACK_PATTERN)
};

static uint32_t src_img_cfg[] = {
        PPP_ARRAY1(CFG, SRC)
};

static uint32_t dst_img_cfg[] = {
        PPP_ARRAY1(CFG, DST)
};

static uint32_t bytes_per_pixel[] = {
        [MDP_RGB_565] = 2,
        [MDP_RGB_888] = 3,
        [MDP_XRGB_8888] = 4,
        [MDP_ARGB_8888] = 4,
        [MDP_RGBA_8888] = 4,
        [MDP_BGRA_8888] = 4,
        [MDP_RGBX_8888] = 4,
        [MDP_Y_CBCR_H2V1] = 1,
        [MDP_Y_CBCR_H2V2] = 1,
        [MDP_Y_CRCB_H2V1] = 1,
        [MDP_Y_CRCB_H2V2] = 1,
        [MDP_YCRYCB_H2V1] = 2
};

static uint32_t dst_op_chroma[] = {
        PPP_ARRAY1(CHROMA_SAMP, DST)
};

static uint32_t src_op_chroma[] = {
        PPP_ARRAY1(CHROMA_SAMP, SRC)
};

static uint32_t bg_op_chroma[] = {
        PPP_ARRAY1(CHROMA_SAMP, BG)
};

static void rotate_dst_addr_x(struct mdp_blit_req *req, struct mdp_regs *regs)
{
        regs->dst0 += (req->dst_rect.w -
                       min((uint32_t)16, req->dst_rect.w)) * regs->dst_bpp;
        regs->dst1 += (req->dst_rect.w -
                       min((uint32_t)16, req->dst_rect.w)) * regs->dst_bpp;
}

static void rotate_dst_addr_y(struct mdp_blit_req *req, struct mdp_regs *regs)
{
        regs->dst0 += (req->dst_rect.h -
                       min((uint32_t)16, req->dst_rect.h)) *
                       regs->dst_ystride;
        regs->dst1 += (req->dst_rect.h -
                       min((uint32_t)16, req->dst_rect.h)) *
                       regs->dst_ystride;
}

static void blit_rotate(struct mdp_blit_req *req,
                        struct mdp_regs *regs)
{
        if (req->flags == MDP_ROT_NOP)
                return;

        regs->op |= PPP_OP_ROT_ON;
        if ((req->flags & MDP_ROT_90 || req->flags & MDP_FLIP_LR) &&
            !(req->flags & MDP_ROT_90 && req->flags & MDP_FLIP_LR))
                rotate_dst_addr_x(req, regs);
        if (req->flags & MDP_ROT_90)
                regs->op |= PPP_OP_ROT_90;
        if (req->flags & MDP_FLIP_UD) {
                regs->op |= PPP_OP_FLIP_UD;
                rotate_dst_addr_y(req, regs);
        }
        if (req->flags & MDP_FLIP_LR)
                regs->op |= PPP_OP_FLIP_LR;
}

static void blit_convert(struct mdp_blit_req *req, struct mdp_regs *regs)
{
        if (req->src.format == req->dst.format)
                return;
        if (IS_RGB(req->src.format) && IS_YCRCB(req->dst.format)) {
                regs->op |= PPP_OP_CONVERT_RGB2YCBCR | PPP_OP_CONVERT_ON;
        } else if (IS_YCRCB(req->src.format) && IS_RGB(req->dst.format)) {
                regs->op |= PPP_OP_CONVERT_YCBCR2RGB | PPP_OP_CONVERT_ON;
                if (req->dst.format == MDP_RGB_565)
                        regs->op |= PPP_OP_CONVERT_MATRIX_SECONDARY;
        }
}

#define GET_BIT_RANGE(value, high, low) \
        (((1 << (high - low + 1)) - 1) & (value >> low))
static uint32_t transp_convert(struct mdp_blit_req *req)
{
        uint32_t transp = 0;
        if (req->src.format == MDP_RGB_565) {
                /* pad each value to 8 bits by copying the high bits into the
                 * low end, convert RGB to RBG by switching low 2 components */
                transp |= ((GET_BIT_RANGE(req->transp_mask, 15, 11) << 3) |
                           (GET_BIT_RANGE(req->transp_mask, 15, 13))) << 16;

                transp |= ((GET_BIT_RANGE(req->transp_mask, 4, 0) << 3) |
                           (GET_BIT_RANGE(req->transp_mask, 4, 2))) << 8;

                transp |= (GET_BIT_RANGE(req->transp_mask, 10, 5) << 2) |
                          (GET_BIT_RANGE(req->transp_mask, 10, 9));
        } else {
                /* convert RGB to RBG */
                transp |= (GET_BIT_RANGE(req->transp_mask, 15, 8)) |
                          (GET_BIT_RANGE(req->transp_mask, 23, 16) << 16) |
                          (GET_BIT_RANGE(req->transp_mask, 7, 0) << 8);
        }
        return transp;
}
#undef GET_BIT_RANGE

static void blit_blend(struct mdp_blit_req *req, struct mdp_regs *regs)
{
        /* TRANSP BLEND */
        if (req->transp_mask != MDP_TRANSP_NOP) {
                req->transp_mask = transp_convert(req);
                if (req->alpha != MDP_ALPHA_NOP) {
                        /* use blended transparancy mode
                         * pixel = (src == transp) ? dst : blend
                         * blend is combo of blend_eq_sel and
                         * blend_alpha_sel */
                        regs->op |= PPP_OP_ROT_ON | PPP_OP_BLEND_ON |
                                PPP_OP_BLEND_ALPHA_BLEND_NORMAL |
                                PPP_OP_BLEND_CONSTANT_ALPHA |
                                PPP_BLEND_ALPHA_TRANSP;
                } else {
                        /* simple transparancy mode
                         * pixel = (src == transp) ? dst : src */
                        regs->op |= PPP_OP_ROT_ON | PPP_OP_BLEND_ON |
                                PPP_OP_BLEND_SRCPIXEL_TRANSP;
                }
        }

        req->alpha &= 0xff;
        /* ALPHA BLEND */
        if (HAS_ALPHA(req->src.format)) {
                regs->op |= PPP_OP_ROT_ON | PPP_OP_BLEND_ON |
                        PPP_OP_BLEND_SRCPIXEL_ALPHA;
        } else if (req->alpha < MDP_ALPHA_NOP) {
                /* just blend by alpha */
                regs->op |= PPP_OP_ROT_ON | PPP_OP_BLEND_ON |
                        PPP_OP_BLEND_ALPHA_BLEND_NORMAL |
                        PPP_OP_BLEND_CONSTANT_ALPHA;
        }

        regs->op |= bg_op_chroma[req->dst.format];
}

#define ONE_HALF        (1LL << 32)
#define ONE             (1LL << 33)
#define TWO             (2LL << 33)
#define THREE           (3LL << 33)
#define FRAC_MASK (ONE - 1)
#define INT_MASK (~FRAC_MASK)

static int scale_params(uint32_t dim_in, uint32_t dim_out, uint32_t origin,
                        uint32_t *phase_init, uint32_t *phase_step)
{
        /* to improve precicsion calculations are done in U31.33 and converted
         * to U3.29 at the end */
        int64_t k1, k2, k3, k4, tmp;
        uint64_t n, d, os, os_p, od, od_p, oreq;
        unsigned rpa = 0;
        int64_t ip64, delta;

        if (dim_out % 3 == 0)
                rpa = !(dim_in % (dim_out / 3));

        n = ((uint64_t)dim_out) << 34;
        d = dim_in;
        if (!d)
                return -1;
        do_div(n, d);
        k3 = (n + 1) >> 1;
        if ((k3 >> 4) < (1LL << 27) || (k3 >> 4) > (1LL << 31)) {
                DLOG("crap bad scale\n");
                return -1;
        }
        n = ((uint64_t)dim_in) << 34;
        d = (uint64_t)dim_out;
        if (!d)
                return -1;
        do_div(n, d);
        k1 = (n + 1) >> 1;
        k2 = (k1 - ONE) >> 1;

        *phase_init = (int)(k2 >> 4);
        k4 = (k3 - ONE) >> 1;

        if (rpa) {
                os = ((uint64_t)origin << 33) - ONE_HALF;
                tmp = (dim_out * os) + ONE_HALF;
                if (!dim_in)
                        return -1;
                do_div(tmp, dim_in);
                od = tmp - ONE_HALF;
        } else {
                os = ((uint64_t)origin << 1) - 1;
                od = (((k3 * os) >> 1) + k4);
        }

        od_p = od & INT_MASK;
        if (od_p != od)
                od_p += ONE;

        if (rpa) {
                tmp = (dim_in * od_p) + ONE_HALF;
                if (!dim_in)
                        return -1;
                do_div(tmp, dim_in);
                os_p = tmp - ONE_HALF;
        } else {
                os_p = ((k1 * (od_p >> 33)) + k2);
        }

        oreq = (os_p & INT_MASK) - ONE;

        ip64 = os_p - oreq;
        delta = ((int64_t)(origin) << 33) - oreq;
        ip64 -= delta;
        /* limit to valid range before the left shift */
        delta = (ip64 & (1LL << 63)) ? 4 : -4;
        delta <<= 33;
        while (abs((int)(ip64 >> 33)) > 4)
                ip64 += delta;
        *phase_init = (int)(ip64 >> 4);
        *phase_step = (uint32_t)(k1 >> 4);
        return 0;
}

static void load_scale_table(const struct mdp_info *mdp,
                             struct mdp_table_entry *table, int len)
{
        int i;
        for (i = 0; i < len; i++)
                mdp_writel(mdp, table[i].val, table[i].reg);
}

enum {
IMG_LEFT,
IMG_RIGHT,
IMG_TOP,
IMG_BOTTOM,
};

static void get_edge_info(uint32_t src, uint32_t src_coord, uint32_t dst,
                          uint32_t *interp1, uint32_t *interp2,
                          uint32_t *repeat1, uint32_t *repeat2) {
        if (src > 3 * dst) {
                *interp1 = 0;
                *interp2 = src - 1;
                *repeat1 = 0;
                *repeat2 = 0;
        } else if (src == 3 * dst) {
                *interp1 = 0;
                *interp2 = src;
                *repeat1 = 0;
                *repeat2 = 1;
        } else if (src > dst && src < 3 * dst) {
                *interp1 = -1;
                *interp2 = src;
                *repeat1 = 1;
                *repeat2 = 1;
        } else if (src == dst) {
                *interp1 = -1;
                *interp2 = src + 1;
                *repeat1 = 1;
                *repeat2 = 2;
        } else {
                *interp1 = -2;
                *interp2 = src + 1;
                *repeat1 = 2;
                *repeat2 = 2;
        }
        *interp1 += src_coord;
        *interp2 += src_coord;
}

static int get_edge_cond(struct mdp_blit_req *req, struct mdp_regs *regs)
{
        int32_t luma_interp[4];
        int32_t luma_repeat[4];
        int32_t chroma_interp[4];
        int32_t chroma_bound[4];
        int32_t chroma_repeat[4];
        uint32_t dst_w, dst_h;

        memset(&luma_interp, 0, sizeof(int32_t) * 4);
        memset(&luma_repeat, 0, sizeof(int32_t) * 4);
        memset(&chroma_interp, 0, sizeof(int32_t) * 4);
        memset(&chroma_bound, 0, sizeof(int32_t) * 4);
        memset(&chroma_repeat, 0, sizeof(int32_t) * 4);
        regs->edge = 0;

        if (req->flags & MDP_ROT_90) {
                dst_w = req->dst_rect.h;
                dst_h = req->dst_rect.w;
        } else {
                dst_w = req->dst_rect.w;
                dst_h = req->dst_rect.h;
        }

        if (regs->op & (PPP_OP_SCALE_Y_ON | PPP_OP_SCALE_X_ON)) {
                get_edge_info(req->src_rect.h, req->src_rect.y, dst_h,
                              &luma_interp[IMG_TOP], &luma_interp[IMG_BOTTOM],
                              &luma_repeat[IMG_TOP], &luma_repeat[IMG_BOTTOM]);
                get_edge_info(req->src_rect.w, req->src_rect.x, dst_w,
                              &luma_interp[IMG_LEFT], &luma_interp[IMG_RIGHT],
                              &luma_repeat[IMG_LEFT], &luma_repeat[IMG_RIGHT]);
        } else {
                luma_interp[IMG_LEFT] = req->src_rect.x;
                luma_interp[IMG_RIGHT] = req->src_rect.x + req->src_rect.w - 1;
                luma_interp[IMG_TOP] = req->src_rect.y;
                luma_interp[IMG_BOTTOM] = req->src_rect.y + req->src_rect.h - 1;
                luma_repeat[IMG_LEFT] = 0;
                luma_repeat[IMG_TOP] = 0;
                luma_repeat[IMG_RIGHT] = 0;
                luma_repeat[IMG_BOTTOM] = 0;
        }

        chroma_interp[IMG_LEFT] = luma_interp[IMG_LEFT];
        chroma_interp[IMG_RIGHT] = luma_interp[IMG_RIGHT];
        chroma_interp[IMG_TOP] = luma_interp[IMG_TOP];
        chroma_interp[IMG_BOTTOM] = luma_interp[IMG_BOTTOM];

        chroma_bound[IMG_LEFT] = req->src_rect.x;
        chroma_bound[IMG_RIGHT] = req->src_rect.x + req->src_rect.w - 1;
        chroma_bound[IMG_TOP] = req->src_rect.y;
        chroma_bound[IMG_BOTTOM] = req->src_rect.y + req->src_rect.h - 1;

        if (IS_YCRCB(req->src.format)) {
                chroma_interp[IMG_LEFT] = chroma_interp[IMG_LEFT] >> 1;
                chroma_interp[IMG_RIGHT] = (chroma_interp[IMG_RIGHT] + 1) >> 1;

                chroma_bound[IMG_LEFT] = chroma_bound[IMG_LEFT] >> 1;
                chroma_bound[IMG_RIGHT] = chroma_bound[IMG_RIGHT] >> 1;
        }

        if (req->src.format == MDP_Y_CBCR_H2V2 ||
            req->src.format == MDP_Y_CRCB_H2V2) {
                chroma_interp[IMG_TOP] = (chroma_interp[IMG_TOP] - 1) >> 1;
                chroma_interp[IMG_BOTTOM] = (chroma_interp[IMG_BOTTOM] + 1)
                                            >> 1;
                chroma_bound[IMG_TOP] = (chroma_bound[IMG_TOP] + 1) >> 1;
                chroma_bound[IMG_BOTTOM] = chroma_bound[IMG_BOTTOM] >> 1;
        }

        chroma_repeat[IMG_LEFT] = chroma_bound[IMG_LEFT] -
                                  chroma_interp[IMG_LEFT];
        chroma_repeat[IMG_RIGHT] = chroma_interp[IMG_RIGHT] -
                                  chroma_bound[IMG_RIGHT];
        chroma_repeat[IMG_TOP] = chroma_bound[IMG_TOP] -
                                  chroma_interp[IMG_TOP];
        chroma_repeat[IMG_BOTTOM] = chroma_interp[IMG_BOTTOM] -
                                  chroma_bound[IMG_BOTTOM];

        if (chroma_repeat[IMG_LEFT] < 0 || chroma_repeat[IMG_LEFT] > 3 ||
            chroma_repeat[IMG_RIGHT] < 0 || chroma_repeat[IMG_RIGHT] > 3 ||
            chroma_repeat[IMG_TOP] < 0 || chroma_repeat[IMG_TOP] > 3 ||
            chroma_repeat[IMG_BOTTOM] < 0 || chroma_repeat[IMG_BOTTOM] > 3 ||
            luma_repeat[IMG_LEFT] < 0 || luma_repeat[IMG_LEFT] > 3 ||
            luma_repeat[IMG_RIGHT] < 0 || luma_repeat[IMG_RIGHT] > 3 ||
            luma_repeat[IMG_TOP] < 0 || luma_repeat[IMG_TOP] > 3 ||
            luma_repeat[IMG_BOTTOM] < 0 || luma_repeat[IMG_BOTTOM] > 3)
                return -1;

        regs->edge |= (chroma_repeat[IMG_LEFT] & 3) << MDP_LEFT_CHROMA;
        regs->edge |= (chroma_repeat[IMG_RIGHT] & 3) << MDP_RIGHT_CHROMA;
        regs->edge |= (chroma_repeat[IMG_TOP] & 3) << MDP_TOP_CHROMA;
        regs->edge |= (chroma_repeat[IMG_BOTTOM] & 3) << MDP_BOTTOM_CHROMA;
        regs->edge |= (luma_repeat[IMG_LEFT] & 3) << MDP_LEFT_LUMA;
        regs->edge |= (luma_repeat[IMG_RIGHT] & 3) << MDP_RIGHT_LUMA;
        regs->edge |= (luma_repeat[IMG_TOP] & 3) << MDP_TOP_LUMA;
        regs->edge |= (luma_repeat[IMG_BOTTOM] & 3) << MDP_BOTTOM_LUMA;
        return 0;
}

static int blit_scale(const struct mdp_info *mdp, struct mdp_blit_req *req,
                      struct mdp_regs *regs)
{
        uint32_t phase_init_x, phase_init_y, phase_step_x, phase_step_y;
        uint32_t scale_factor_x, scale_factor_y;
        uint32_t downscale;
        uint32_t dst_w, dst_h;

        if (req->flags & MDP_ROT_90) {
                dst_w = req->dst_rect.h;
                dst_h = req->dst_rect.w;
        } else {
                dst_w = req->dst_rect.w;
                dst_h = req->dst_rect.h;
        }
        if ((req->src_rect.w == dst_w)  && (req->src_rect.h == dst_h) &&
            !(req->flags & MDP_BLUR)) {
                regs->phasex_init = 0;
                regs->phasey_init = 0;
                regs->phasex_step = 0;
                regs->phasey_step = 0;
                return 0;
        }

        if (scale_params(req->src_rect.w, dst_w, 1, &phase_init_x,
                         &phase_step_x) ||
            scale_params(req->src_rect.h, dst_h, 1, &phase_init_y,
                         &phase_step_y))
                return -1;

        scale_factor_x = (dst_w * 10) / req->src_rect.w;
        scale_factor_y = (dst_h * 10) / req->src_rect.h;

        if (scale_factor_x > 8)
                downscale = MDP_DOWNSCALE_PT8TO1;
        else if (scale_factor_x > 6)
                downscale = MDP_DOWNSCALE_PT6TOPT8;
        else if (scale_factor_x > 4)
                downscale = MDP_DOWNSCALE_PT4TOPT6;
        else
                downscale = MDP_DOWNSCALE_PT2TOPT4;
        if (downscale != downscale_x_table) {
                load_scale_table(mdp, mdp_downscale_x_table[downscale], 64);
                downscale_x_table = downscale;
        }

        if (scale_factor_y > 8)
                downscale = MDP_DOWNSCALE_PT8TO1;
        else if (scale_factor_y > 6)
                downscale = MDP_DOWNSCALE_PT6TOPT8;
        else if (scale_factor_y > 4)
                downscale = MDP_DOWNSCALE_PT4TOPT6;
        else
                downscale = MDP_DOWNSCALE_PT2TOPT4;
        if (downscale != downscale_y_table) {
                load_scale_table(mdp, mdp_downscale_y_table[downscale], 64);
                downscale_y_table = downscale;
        }

        regs->phasex_init = phase_init_x;
        regs->phasey_init = phase_init_y;
        regs->phasex_step = phase_step_x;
        regs->phasey_step = phase_step_y;
        regs->op |= (PPP_OP_SCALE_Y_ON | PPP_OP_SCALE_X_ON);
        return 0;

}

static void blit_blur(const struct mdp_info *mdp, struct mdp_blit_req *req,
                      struct mdp_regs *regs)
{
        if (!(req->flags & MDP_BLUR))
                return;

        if (!(downscale_x_table == MDP_DOWNSCALE_BLUR &&
              downscale_y_table == MDP_DOWNSCALE_BLUR)) {
                load_scale_table(mdp, mdp_gaussian_blur_table, 128);
                downscale_x_table = MDP_DOWNSCALE_BLUR;
                downscale_y_table = MDP_DOWNSCALE_BLUR;
        }

        regs->op |= (PPP_OP_SCALE_Y_ON | PPP_OP_SCALE_X_ON);
}


#define IMG_LEN(rect_h, w, rect_w, bpp) (((rect_h) * w) * bpp)

#define Y_TO_CRCB_RATIO(format) \
        ((format == MDP_Y_CBCR_H2V2 || format == MDP_Y_CRCB_H2V2) ?  2 :\
         (format == MDP_Y_CBCR_H2V1 || format == MDP_Y_CRCB_H2V1) ?  1 : 1)

static void get_len(struct mdp_img *img, struct mdp_rect *rect, uint32_t bpp,
                    uint32_t *len0, uint32_t *len1)
{
        *len0 = IMG_LEN(rect->h, img->width, rect->w, bpp);
        if (IS_PSEUDOPLNR(img->format))
                *len1 = *len0/Y_TO_CRCB_RATIO(img->format);
        else
                *len1 = 0;
}

static int valid_src_dst(unsigned long src_start, unsigned long src_len,
                         unsigned long dst_start, unsigned long dst_len,
                         struct mdp_blit_req *req, struct mdp_regs *regs)
{
        unsigned long src_min_ok = src_start;
        unsigned long src_max_ok = src_start + src_len;
        unsigned long dst_min_ok = dst_start;
        unsigned long dst_max_ok = dst_start + dst_len;
        uint32_t src0_len, src1_len, dst0_len, dst1_len;
        get_len(&req->src, &req->src_rect, regs->src_bpp, &src0_len,
                 &src1_len);
        get_len(&req->dst, &req->dst_rect, regs->dst_bpp, &dst0_len,
                 &dst1_len);

        if (regs->src0 < src_min_ok || regs->src0 > src_max_ok ||
            regs->src0 + src0_len > src_max_ok) {
                DLOG("invalid_src %x %x %lx %lx\n", regs->src0,
                      src0_len, src_min_ok, src_max_ok);
                return 0;
        }
        if (regs->src_cfg & PPP_SRC_PLANE_PSEUDOPLNR) {
                if (regs->src1 < src_min_ok || regs->src1 > src_max_ok ||
                    regs->src1 + src1_len > src_max_ok) {
                        DLOG("invalid_src1");
                        return 0;
                }
        }
        if (regs->dst0 < dst_min_ok || regs->dst0 > dst_max_ok ||
            regs->dst0 + dst0_len > dst_max_ok) {
                DLOG("invalid_dst");
                return 0;
        }
        if (regs->dst_cfg & PPP_SRC_PLANE_PSEUDOPLNR) {
                if (regs->dst1 < dst_min_ok || regs->dst1 > dst_max_ok ||
                    regs->dst1 + dst1_len > dst_max_ok) {
                        DLOG("invalid_dst1");
                        return 0;
                }
        }
        return 1;
}


static void flush_imgs(struct mdp_blit_req *req, struct mdp_regs *regs,
                       struct file *src_file, struct file *dst_file)
{
}

static void get_chroma_addr(struct mdp_img *img, struct mdp_rect *rect,
                            uint32_t base, uint32_t bpp, uint32_t cfg,
                            uint32_t *addr, uint32_t *ystride)
{
        uint32_t compress_v = Y_TO_CRCB_RATIO(img->format);
        uint32_t compress_h = 2;
        uint32_t  offset;

        if (IS_PSEUDOPLNR(img->format)) {
                offset = (rect->x / compress_h) * compress_h;
                offset += rect->y == 0 ? 0 :
                          ((rect->y + 1) / compress_v) * img->width;
                *addr = base + (img->width * img->height * bpp);
                *addr += offset * bpp;
                *ystride |= *ystride << 16;
        } else {
                *addr = 0;
        }
}

static int send_blit(const struct mdp_info *mdp, struct mdp_blit_req *req,
                     struct mdp_regs *regs, struct file *src_file,
                     struct file *dst_file)
{
        mdp_writel(mdp, 1, 0x060);
        mdp_writel(mdp, regs->src_rect, PPP_ADDR_SRC_ROI);
        mdp_writel(mdp, regs->src0, PPP_ADDR_SRC0);
        mdp_writel(mdp, regs->src1, PPP_ADDR_SRC1);
        mdp_writel(mdp, regs->src_ystride, PPP_ADDR_SRC_YSTRIDE);
        mdp_writel(mdp, regs->src_cfg, PPP_ADDR_SRC_CFG);
        mdp_writel(mdp, regs->src_pack, PPP_ADDR_SRC_PACK_PATTERN);

        mdp_writel(mdp, regs->op, PPP_ADDR_OPERATION);
        mdp_writel(mdp, regs->phasex_init, PPP_ADDR_PHASEX_INIT);
        mdp_writel(mdp, regs->phasey_init, PPP_ADDR_PHASEY_INIT);
        mdp_writel(mdp, regs->phasex_step, PPP_ADDR_PHASEX_STEP);
        mdp_writel(mdp, regs->phasey_step, PPP_ADDR_PHASEY_STEP);

        mdp_writel(mdp, (req->alpha << 24) | (req->transp_mask & 0xffffff),
               PPP_ADDR_ALPHA_TRANSP);

        mdp_writel(mdp, regs->dst_cfg, PPP_ADDR_DST_CFG);
        mdp_writel(mdp, regs->dst_pack, PPP_ADDR_DST_PACK_PATTERN);
        mdp_writel(mdp, regs->dst_rect, PPP_ADDR_DST_ROI);
        mdp_writel(mdp, regs->dst0, PPP_ADDR_DST0);
        mdp_writel(mdp, regs->dst1, PPP_ADDR_DST1);
        mdp_writel(mdp, regs->dst_ystride, PPP_ADDR_DST_YSTRIDE);

        mdp_writel(mdp, regs->edge, PPP_ADDR_EDGE);
        if (regs->op & PPP_OP_BLEND_ON) {
                mdp_writel(mdp, regs->dst0, PPP_ADDR_BG0);
                mdp_writel(mdp, regs->dst1, PPP_ADDR_BG1);
                mdp_writel(mdp, regs->dst_ystride, PPP_ADDR_BG_YSTRIDE);
                mdp_writel(mdp, src_img_cfg[req->dst.format], PPP_ADDR_BG_CFG);
                mdp_writel(mdp, pack_pattern[req->dst.format],
                           PPP_ADDR_BG_PACK_PATTERN);
        }
        flush_imgs(req, regs, src_file, dst_file);
        mdp_writel(mdp, 0x1000, MDP_DISPLAY0_START);
        return 0;
}

int mdp_ppp_blit(const struct mdp_info *mdp, struct mdp_blit_req *req,
                 struct file *src_file, unsigned long src_start, unsigned long src_len,
                 struct file *dst_file, unsigned long dst_start, unsigned long dst_len)
{
        struct mdp_regs regs = {0};

        if (unlikely(req->src.format >= MDP_IMGTYPE_LIMIT ||
                     req->dst.format >= MDP_IMGTYPE_LIMIT)) {
                printk(KERN_ERR "mpd_ppp: img is of wrong format\n");
                return -EINVAL;
        }

        if (unlikely(req->src_rect.x > req->src.width ||
                     req->src_rect.y > req->src.height ||
                     req->dst_rect.x > req->dst.width ||
                     req->dst_rect.y > req->dst.height)) {
                printk(KERN_ERR "mpd_ppp: img rect is outside of img!\n");
                return -EINVAL;
        }

        /* set the src image configuration */
        regs.src_cfg = src_img_cfg[req->src.format];
        regs.src_cfg |= (req->src_rect.x & 0x1) ? PPP_SRC_BPP_ROI_ODD_X : 0;
        regs.src_cfg |= (req->src_rect.y & 0x1) ? PPP_SRC_BPP_ROI_ODD_Y : 0;
        regs.src_rect = (req->src_rect.h << 16) | req->src_rect.w;
        regs.src_pack = pack_pattern[req->src.format];

        /* set the dest image configuration */
        regs.dst_cfg = dst_img_cfg[req->dst.format] | PPP_DST_OUT_SEL_AXI;
        regs.dst_rect = (req->dst_rect.h << 16) | req->dst_rect.w;
        regs.dst_pack = pack_pattern[req->dst.format];

        /* set src, bpp, start pixel and ystride */
        regs.src_bpp = bytes_per_pixel[req->src.format];
        regs.src0 = src_start + req->src.offset;
        regs.src_ystride = req->src.width * regs.src_bpp;
        get_chroma_addr(&req->src, &req->src_rect, regs.src0, regs.src_bpp,
                        regs.src_cfg, &regs.src1, &regs.src_ystride);
        regs.src0 += (req->src_rect.x + (req->src_rect.y * req->src.width)) *
                      regs.src_bpp;

        /* set dst, bpp, start pixel and ystride */
        regs.dst_bpp = bytes_per_pixel[req->dst.format];
        regs.dst0 = dst_start + req->dst.offset;
        regs.dst_ystride = req->dst.width * regs.dst_bpp;
        get_chroma_addr(&req->dst, &req->dst_rect, regs.dst0, regs.dst_bpp,
                        regs.dst_cfg, &regs.dst1, &regs.dst_ystride);
        regs.dst0 += (req->dst_rect.x + (req->dst_rect.y * req->dst.width)) *
                      regs.dst_bpp;

        if (!valid_src_dst(src_start, src_len, dst_start, dst_len, req,
                           &regs)) {
                printk(KERN_ERR "mpd_ppp: final src or dst location is "
                        "invalid, are you trying to make an image too large "
                        "or to place it outside the screen?\n");
                return -EINVAL;
        }

        /* set up operation register */
        regs.op = 0;
        blit_rotate(req, &regs);
        blit_convert(req, &regs);
        if (req->flags & MDP_DITHER)
                regs.op |= PPP_OP_DITHER_EN;
        blit_blend(req, &regs);
        if (blit_scale(mdp, req, &regs)) {
                printk(KERN_ERR "mpd_ppp: error computing scale for img.\n");
                return -EINVAL;
        }
        blit_blur(mdp, req, &regs);
        regs.op |= dst_op_chroma[req->dst.format] |
                   src_op_chroma[req->src.format];

        /* if the image is YCRYCB, the x and w must be even */
        if (unlikely(req->src.format == MDP_YCRYCB_H2V1)) {
                req->src_rect.x = req->src_rect.x & (~0x1);
                req->src_rect.w = req->src_rect.w & (~0x1);
                req->dst_rect.x = req->dst_rect.x & (~0x1);
                req->dst_rect.w = req->dst_rect.w & (~0x1);
        }
        if (get_edge_cond(req, &regs))
                return -EINVAL;

        send_blit(mdp, req, &regs, src_file, dst_file);
        return 0;
}