// SPDX-License-Identifier: GPL-2.0+
/*
 * Porting to u-boot:
 *
 * (C) Copyright 2010
 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
 *
 * Linux IPU driver for MX51:
 *
 * (C) Copyright 2005-2010 Freescale Semiconductor, Inc.
 */

/* #define DEBUG */

#include <common.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/sys_proto.h>
#include "ipu.h"
#include "ipu_regs.h"

enum csc_type_t {
        RGB2YUV = 0,
        YUV2RGB,
        RGB2RGB,
        YUV2YUV,
        CSC_NONE,
        CSC_NUM
};

struct dp_csc_param_t {
        int mode;
        const int (*coeff)[5][3];
};

#define SYNC_WAVE 0

/* DC display ID assignments */
#define DC_DISP_ID_SYNC(di)     (di)
#define DC_DISP_ID_SERIAL       2
#define DC_DISP_ID_ASYNC        3

int dmfc_type_setup;
static int dmfc_size_28, dmfc_size_29, dmfc_size_24, dmfc_size_27, dmfc_size_23;
int g_di1_tvout;

extern struct clk *g_ipu_clk;
extern struct clk *g_ldb_clk;
extern struct clk *g_di_clk[2];
extern struct clk *g_pixel_clk[2];

extern unsigned char g_ipu_clk_enabled;
extern unsigned char g_dc_di_assignment[];

void ipu_dmfc_init(int dmfc_type, int first)
{
        u32 dmfc_wr_chan, dmfc_dp_chan;

        if (first) {
                if (dmfc_type_setup > dmfc_type)
                        dmfc_type = dmfc_type_setup;
                else
                        dmfc_type_setup = dmfc_type;

                /* disable DMFC-IC channel*/
                __raw_writel(0x2, DMFC_IC_CTRL);
        } else if (dmfc_type_setup >= DMFC_HIGH_RESOLUTION_DC) {
                printf("DMFC high resolution has set, will not change\n");
                return;
        } else
                dmfc_type_setup = dmfc_type;

        if (dmfc_type == DMFC_HIGH_RESOLUTION_DC) {
                /* 1 - segment 0~3;
                 * 5B - segement 4, 5;
                 * 5F - segement 6, 7;
                 * 1C, 2C and 6B, 6F unused;
                 */
                debug("IPU DMFC DC HIGH RES: 1(0~3), 5B(4,5), 5F(6,7)\n");
                dmfc_wr_chan = 0x00000088;
                dmfc_dp_chan = 0x00009694;
                dmfc_size_28 = 256 * 4;
                dmfc_size_29 = 0;
                dmfc_size_24 = 0;
                dmfc_size_27 = 128 * 4;
                dmfc_size_23 = 128 * 4;
        } else if (dmfc_type == DMFC_HIGH_RESOLUTION_DP) {
                /* 1 - segment 0, 1;
                 * 5B - segement 2~5;
                 * 5F - segement 6,7;
                 * 1C, 2C and 6B, 6F unused;
                 */
                debug("IPU DMFC DP HIGH RES: 1(0,1), 5B(2~5), 5F(6,7)\n");
                dmfc_wr_chan = 0x00000090;
                dmfc_dp_chan = 0x0000968a;
                dmfc_size_28 = 128 * 4;
                dmfc_size_29 = 0;
                dmfc_size_24 = 0;
                dmfc_size_27 = 128 * 4;
                dmfc_size_23 = 256 * 4;
        } else if (dmfc_type == DMFC_HIGH_RESOLUTION_ONLY_DP) {
                /* 5B - segement 0~3;
                 * 5F - segement 4~7;
                 * 1, 1C, 2C and 6B, 6F unused;
                 */
                debug("IPU DMFC ONLY-DP HIGH RES: 5B(0~3), 5F(4~7)\n");
                dmfc_wr_chan = 0x00000000;
                dmfc_dp_chan = 0x00008c88;
                dmfc_size_28 = 0;
                dmfc_size_29 = 0;
                dmfc_size_24 = 0;
                dmfc_size_27 = 256 * 4;
                dmfc_size_23 = 256 * 4;
        } else {
                /* 1 - segment 0, 1;
                 * 5B - segement 4, 5;
                 * 5F - segement 6, 7;
                 * 1C, 2C and 6B, 6F unused;
                 */
                debug("IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)\n");
                dmfc_wr_chan = 0x00000090;
                dmfc_dp_chan = 0x00009694;
                dmfc_size_28 = 128 * 4;
                dmfc_size_29 = 0;
                dmfc_size_24 = 0;
                dmfc_size_27 = 128 * 4;
                dmfc_size_23 = 128 * 4;
        }
        __raw_writel(dmfc_wr_chan, DMFC_WR_CHAN);
        __raw_writel(0x202020F6, DMFC_WR_CHAN_DEF);
        __raw_writel(dmfc_dp_chan, DMFC_DP_CHAN);
        /* Enable chan 5 watermark set at 5 bursts and clear at 7 bursts */
        __raw_writel(0x2020F6F6, DMFC_DP_CHAN_DEF);
}

void ipu_dmfc_set_wait4eot(int dma_chan, int width)
{
        u32 dmfc_gen1 = __raw_readl(DMFC_GENERAL1);

        if (width >= HIGH_RESOLUTION_WIDTH) {
                if (dma_chan == 23)
                        ipu_dmfc_init(DMFC_HIGH_RESOLUTION_DP, 0);
                else if (dma_chan == 28)
                        ipu_dmfc_init(DMFC_HIGH_RESOLUTION_DC, 0);
        }

        if (dma_chan == 23) { /*5B*/
                if (dmfc_size_23 / width > 3)
                        dmfc_gen1 |= 1UL << 20;
                else
                        dmfc_gen1 &= ~(1UL << 20);
        } else if (dma_chan == 24) { /*6B*/
                if (dmfc_size_24 / width > 1)
                        dmfc_gen1 |= 1UL << 22;
                else
                        dmfc_gen1 &= ~(1UL << 22);
        } else if (dma_chan == 27) { /*5F*/
                if (dmfc_size_27 / width > 2)
                        dmfc_gen1 |= 1UL << 21;
                else
                        dmfc_gen1 &= ~(1UL << 21);
        } else if (dma_chan == 28) { /*1*/
                if (dmfc_size_28 / width > 2)
                        dmfc_gen1 |= 1UL << 16;
                else
                        dmfc_gen1 &= ~(1UL << 16);
        } else if (dma_chan == 29) { /*6F*/
                if (dmfc_size_29 / width > 1)
                        dmfc_gen1 |= 1UL << 23;
                else
                        dmfc_gen1 &= ~(1UL << 23);
        }

        __raw_writel(dmfc_gen1, DMFC_GENERAL1);
}

static void ipu_di_data_wave_config(int di,
                                     int wave_gen,
                                     int access_size, int component_size)
{
        u32 reg;
        reg = (access_size << DI_DW_GEN_ACCESS_SIZE_OFFSET) |
            (component_size << DI_DW_GEN_COMPONENT_SIZE_OFFSET);
        __raw_writel(reg, DI_DW_GEN(di, wave_gen));
}

static void ipu_di_data_pin_config(int di, int wave_gen, int di_pin, int set,
                                    int up, int down)
{
        u32 reg;

        reg = __raw_readl(DI_DW_GEN(di, wave_gen));
        reg &= ~(0x3 << (di_pin * 2));
        reg |= set << (di_pin * 2);
        __raw_writel(reg, DI_DW_GEN(di, wave_gen));

        __raw_writel((down << 16) | up, DI_DW_SET(di, wave_gen, set));
}

static void ipu_di_sync_config(int di, int wave_gen,
                                int run_count, int run_src,
                                int offset_count, int offset_src,
                                int repeat_count, int cnt_clr_src,
                                int cnt_polarity_gen_en,
                                int cnt_polarity_clr_src,
                                int cnt_polarity_trigger_src,
                                int cnt_up, int cnt_down)
{
        u32 reg;

        if ((run_count >= 0x1000) || (offset_count >= 0x1000) ||
                (repeat_count >= 0x1000) ||
                (cnt_up >= 0x400) || (cnt_down >= 0x400)) {
                printf("DI%d counters out of range.\n", di);
                return;
        }

        reg = (run_count << 19) | (++run_src << 16) |
            (offset_count << 3) | ++offset_src;
        __raw_writel(reg, DI_SW_GEN0(di, wave_gen));
        reg = (cnt_polarity_gen_en << 29) | (++cnt_clr_src << 25) |
            (++cnt_polarity_trigger_src << 12) | (++cnt_polarity_clr_src << 9);
        reg |= (cnt_down << 16) | cnt_up;
        if (repeat_count == 0) {
                /* Enable auto reload */
                reg |= 0x10000000;
        }
        __raw_writel(reg, DI_SW_GEN1(di, wave_gen));
        reg = __raw_readl(DI_STP_REP(di, wave_gen));
        reg &= ~(0xFFFF << (16 * ((wave_gen - 1) & 0x1)));
        reg |= repeat_count << (16 * ((wave_gen - 1) & 0x1));
        __raw_writel(reg, DI_STP_REP(di, wave_gen));
}

static void ipu_dc_map_config(int map, int byte_num, int offset, int mask)
{
        int ptr = map * 3 + byte_num;
        u32 reg;

        reg = __raw_readl(DC_MAP_CONF_VAL(ptr));
        reg &= ~(0xFFFF << (16 * (ptr & 0x1)));
        reg |= ((offset << 8) | mask) << (16 * (ptr & 0x1));
        __raw_writel(reg, DC_MAP_CONF_VAL(ptr));

        reg = __raw_readl(DC_MAP_CONF_PTR(map));
        reg &= ~(0x1F << ((16 * (map & 0x1)) + (5 * byte_num)));
        reg |= ptr << ((16 * (map & 0x1)) + (5 * byte_num));
        __raw_writel(reg, DC_MAP_CONF_PTR(map));
}

static void ipu_dc_map_clear(int map)
{
        u32 reg = __raw_readl(DC_MAP_CONF_PTR(map));
        __raw_writel(reg & ~(0xFFFF << (16 * (map & 0x1))),
                     DC_MAP_CONF_PTR(map));
}

static void ipu_dc_write_tmpl(int word, u32 opcode, u32 operand, int map,
                               int wave, int glue, int sync)
{
        u32 reg;
        int stop = 1;

        reg = sync;
        reg |= (glue << 4);
        reg |= (++wave << 11);
        reg |= (++map << 15);
        reg |= (operand << 20) & 0xFFF00000;
        __raw_writel(reg, ipu_dc_tmpl_reg + word * 2);

        reg = (operand >> 12);
        reg |= opcode << 4;
        reg |= (stop << 9);
        __raw_writel(reg, ipu_dc_tmpl_reg + word * 2 + 1);
}

static void ipu_dc_link_event(int chan, int event, int addr, int priority)
{
        u32 reg;

        reg = __raw_readl(DC_RL_CH(chan, event));
        reg &= ~(0xFFFF << (16 * (event & 0x1)));
        reg |= ((addr << 8) | priority) << (16 * (event & 0x1));
        __raw_writel(reg, DC_RL_CH(chan, event));
}

/* Y = R *  1.200 + G *  2.343 + B *  .453 + 0.250;
 * U = R * -.672 + G * -1.328 + B *  2.000 + 512.250.;
 * V = R *  2.000 + G * -1.672 + B * -.328 + 512.250.;
 */
static const int rgb2ycbcr_coeff[5][3] = {
        {0x4D, 0x96, 0x1D},
        {0x3D5, 0x3AB, 0x80},
        {0x80, 0x395, 0x3EB},
        {0x0000, 0x0200, 0x0200},       /* B0, B1, B2 */
        {0x2, 0x2, 0x2},        /* S0, S1, S2 */
};

/* R = (1.164 * (Y - 16)) + (1.596 * (Cr - 128));
 * G = (1.164 * (Y - 16)) - (0.392 * (Cb - 128)) - (0.813 * (Cr - 128));
 * B = (1.164 * (Y - 16)) + (2.017 * (Cb - 128);
 */
static const int ycbcr2rgb_coeff[5][3] = {
        {0x095, 0x000, 0x0CC},
        {0x095, 0x3CE, 0x398},
        {0x095, 0x0FF, 0x000},
        {0x3E42, 0x010A, 0x3DD6},       /*B0,B1,B2 */
        {0x1, 0x1, 0x1},        /*S0,S1,S2 */
};

#define mask_a(a) ((u32)(a) & 0x3FF)
#define mask_b(b) ((u32)(b) & 0x3FFF)

/* Pls keep S0, S1 and S2 as 0x2 by using this convertion */
static int rgb_to_yuv(int n, int red, int green, int blue)
{
        int c;
        c = red * rgb2ycbcr_coeff[n][0];
        c += green * rgb2ycbcr_coeff[n][1];
        c += blue * rgb2ycbcr_coeff[n][2];
        c /= 16;
        c += rgb2ycbcr_coeff[3][n] * 4;
        c += 8;
        c /= 16;
        if (c < 0)
                c = 0;
        if (c > 255)
                c = 255;
        return c;
}

/*
 * Row is for BG:       RGB2YUV YUV2RGB RGB2RGB YUV2YUV CSC_NONE
 * Column is for FG:    RGB2YUV YUV2RGB RGB2RGB YUV2YUV CSC_NONE
 */
static struct dp_csc_param_t dp_csc_array[CSC_NUM][CSC_NUM] = {
        {
                {DP_COM_CONF_CSC_DEF_BOTH, &rgb2ycbcr_coeff},
                {0, 0},
                {0, 0},
                {DP_COM_CONF_CSC_DEF_BG, &rgb2ycbcr_coeff},
                {DP_COM_CONF_CSC_DEF_BG, &rgb2ycbcr_coeff}
        },
        {
                {0, 0},
                {DP_COM_CONF_CSC_DEF_BOTH, &ycbcr2rgb_coeff},
                {DP_COM_CONF_CSC_DEF_BG, &ycbcr2rgb_coeff},
                {0, 0},
                {DP_COM_CONF_CSC_DEF_BG, &ycbcr2rgb_coeff}
        },
        {
                {0, 0},
                {DP_COM_CONF_CSC_DEF_FG, &ycbcr2rgb_coeff},
                {0, 0},
                {0, 0},
                {0, 0}
        },
        {
                {DP_COM_CONF_CSC_DEF_FG, &rgb2ycbcr_coeff},
                {0, 0},
                {0, 0},
                {0, 0},
                {0, 0}
        },
        {
                {DP_COM_CONF_CSC_DEF_FG, &rgb2ycbcr_coeff},
                {DP_COM_CONF_CSC_DEF_FG, &ycbcr2rgb_coeff},
                {0, 0},
                {0, 0},
                {0, 0}
        }
};

static enum csc_type_t fg_csc_type = CSC_NONE, bg_csc_type = CSC_NONE;
static int color_key_4rgb = 1;

static void ipu_dp_csc_setup(int dp, struct dp_csc_param_t dp_csc_param,
                        unsigned char srm_mode_update)
{
        u32 reg;
        const int (*coeff)[5][3];

        if (dp_csc_param.mode >= 0) {
                reg = __raw_readl(DP_COM_CONF());
                reg &= ~DP_COM_CONF_CSC_DEF_MASK;
                reg |= dp_csc_param.mode;
                __raw_writel(reg, DP_COM_CONF());
        }

        coeff = dp_csc_param.coeff;

        if (coeff) {
                __raw_writel(mask_a((*coeff)[0][0]) |
                                (mask_a((*coeff)[0][1]) << 16), DP_CSC_A_0());
                __raw_writel(mask_a((*coeff)[0][2]) |
                                (mask_a((*coeff)[1][0]) << 16), DP_CSC_A_1());
                __raw_writel(mask_a((*coeff)[1][1]) |
                                (mask_a((*coeff)[1][2]) << 16), DP_CSC_A_2());
                __raw_writel(mask_a((*coeff)[2][0]) |
                                (mask_a((*coeff)[2][1]) << 16), DP_CSC_A_3());
                __raw_writel(mask_a((*coeff)[2][2]) |
                                (mask_b((*coeff)[3][0]) << 16) |
                                ((*coeff)[4][0] << 30), DP_CSC_0());
                __raw_writel(mask_b((*coeff)[3][1]) | ((*coeff)[4][1] << 14) |
                                (mask_b((*coeff)[3][2]) << 16) |
                                ((*coeff)[4][2] << 30), DP_CSC_1());
        }

        if (srm_mode_update) {
                reg = __raw_readl(IPU_SRM_PRI2) | 0x8;
                __raw_writel(reg, IPU_SRM_PRI2);
        }
}

int ipu_dp_init(ipu_channel_t channel, uint32_t in_pixel_fmt,
                 uint32_t out_pixel_fmt)
{
        int in_fmt, out_fmt;
        int dp;
        int partial = 0;
        uint32_t reg;

        if (channel == MEM_FG_SYNC) {
                dp = DP_SYNC;
                partial = 1;
        } else if (channel == MEM_BG_SYNC) {
                dp = DP_SYNC;
                partial = 0;
        } else if (channel == MEM_BG_ASYNC0) {
                dp = DP_ASYNC0;
                partial = 0;
        } else {
                return -EINVAL;
        }

        in_fmt = format_to_colorspace(in_pixel_fmt);
        out_fmt = format_to_colorspace(out_pixel_fmt);

        if (partial) {
                if (in_fmt == RGB) {
                        if (out_fmt == RGB)
                                fg_csc_type = RGB2RGB;
                        else
                                fg_csc_type = RGB2YUV;
                } else {
                        if (out_fmt == RGB)
                                fg_csc_type = YUV2RGB;
                        else
                                fg_csc_type = YUV2YUV;
                }
        } else {
                if (in_fmt == RGB) {
                        if (out_fmt == RGB)
                                bg_csc_type = RGB2RGB;
                        else
                                bg_csc_type = RGB2YUV;
                } else {
                        if (out_fmt == RGB)
                                bg_csc_type = YUV2RGB;
                        else
                                bg_csc_type = YUV2YUV;
                }
        }

        /* Transform color key from rgb to yuv if CSC is enabled */
        reg = __raw_readl(DP_COM_CONF());
        if (color_key_4rgb && (reg & DP_COM_CONF_GWCKE) &&
                (((fg_csc_type == RGB2YUV) && (bg_csc_type == YUV2YUV)) ||
                ((fg_csc_type == YUV2YUV) && (bg_csc_type == RGB2YUV)) ||
                ((fg_csc_type == YUV2YUV) && (bg_csc_type == YUV2YUV)) ||
                ((fg_csc_type == YUV2RGB) && (bg_csc_type == YUV2RGB)))) {
                int red, green, blue;
                int y, u, v;
                uint32_t color_key = __raw_readl(DP_GRAPH_WIND_CTRL()) &
                        0xFFFFFFL;

                debug("_ipu_dp_init color key 0x%x need change to yuv fmt!\n",
                        color_key);

                red = (color_key >> 16) & 0xFF;
                green = (color_key >> 8) & 0xFF;
                blue = color_key & 0xFF;

                y = rgb_to_yuv(0, red, green, blue);
                u = rgb_to_yuv(1, red, green, blue);
                v = rgb_to_yuv(2, red, green, blue);
                color_key = (y << 16) | (u << 8) | v;

                reg = __raw_readl(DP_GRAPH_WIND_CTRL()) & 0xFF000000L;
                __raw_writel(reg | color_key, DP_GRAPH_WIND_CTRL());
                color_key_4rgb = 0;

                debug("_ipu_dp_init color key change to yuv fmt 0x%x!\n",
                        color_key);
        }

        ipu_dp_csc_setup(dp, dp_csc_array[bg_csc_type][fg_csc_type], 1);

        return 0;
}

void ipu_dp_uninit(ipu_channel_t channel)
{
        int dp;
        int partial = 0;

        if (channel == MEM_FG_SYNC) {
                dp = DP_SYNC;
                partial = 1;
        } else if (channel == MEM_BG_SYNC) {
                dp = DP_SYNC;
                partial = 0;
        } else if (channel == MEM_BG_ASYNC0) {
                dp = DP_ASYNC0;
                partial = 0;
        } else {
                return;
        }

        if (partial)
                fg_csc_type = CSC_NONE;
        else
                bg_csc_type = CSC_NONE;

        ipu_dp_csc_setup(dp, dp_csc_array[bg_csc_type][fg_csc_type], 0);
}

void ipu_dc_init(int dc_chan, int di, unsigned char interlaced)
{
        u32 reg = 0;

        if ((dc_chan == 1) || (dc_chan == 5)) {
                if (interlaced) {
                        ipu_dc_link_event(dc_chan, DC_EVT_NL, 0, 3);
                        ipu_dc_link_event(dc_chan, DC_EVT_EOL, 0, 2);
                        ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA, 0, 1);
                } else {
                        if (di) {
                                ipu_dc_link_event(dc_chan, DC_EVT_NL, 2, 3);
                                ipu_dc_link_event(dc_chan, DC_EVT_EOL, 3, 2);
                                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA,
                                        4, 1);
                        } else {
                                ipu_dc_link_event(dc_chan, DC_EVT_NL, 5, 3);
                                ipu_dc_link_event(dc_chan, DC_EVT_EOL, 6, 2);
                                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA,
                                        7, 1);
                        }
                }
                ipu_dc_link_event(dc_chan, DC_EVT_NF, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NFIELD, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_EOF, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_EOFIELD, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_CHAN, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_ADDR, 0, 0);

                reg = 0x2;
                reg |= DC_DISP_ID_SYNC(di) << DC_WR_CH_CONF_PROG_DISP_ID_OFFSET;
                reg |= di << 2;
                if (interlaced)
                        reg |= DC_WR_CH_CONF_FIELD_MODE;
        } else if ((dc_chan == 8) || (dc_chan == 9)) {
                /* async channels */
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA_W_0, 0x64, 1);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA_W_1, 0x64, 1);

                reg = 0x3;
                reg |= DC_DISP_ID_SERIAL << DC_WR_CH_CONF_PROG_DISP_ID_OFFSET;
        }
        __raw_writel(reg, DC_WR_CH_CONF(dc_chan));

        __raw_writel(0x00000000, DC_WR_CH_ADDR(dc_chan));

        __raw_writel(0x00000084, DC_GEN);
}

void ipu_dc_uninit(int dc_chan)
{
        if ((dc_chan == 1) || (dc_chan == 5)) {
                ipu_dc_link_event(dc_chan, DC_EVT_NL, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_EOL, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NF, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NFIELD, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_EOF, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_EOFIELD, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_CHAN, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_ADDR, 0, 0);
        } else if ((dc_chan == 8) || (dc_chan == 9)) {
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_ADDR_W_0, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_ADDR_W_1, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_CHAN_W_0, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_CHAN_W_1, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA_W_0, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA_W_1, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_ADDR_R_0, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_ADDR_R_1, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_CHAN_R_0, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_CHAN_R_1, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA_R_0, 0, 0);
                ipu_dc_link_event(dc_chan, DC_EVT_NEW_DATA_R_1, 0, 0);
        }
}

void ipu_dp_dc_enable(ipu_channel_t channel)
{
        int di;
        uint32_t reg;
        uint32_t dc_chan;

        if (channel == MEM_DC_SYNC)
                dc_chan = 1;
        else if ((channel == MEM_BG_SYNC) || (channel == MEM_FG_SYNC))
                dc_chan = 5;
        else
                return;

        if (channel == MEM_FG_SYNC) {
                /* Enable FG channel */
                reg = __raw_readl(DP_COM_CONF());
                __raw_writel(reg | DP_COM_CONF_FG_EN, DP_COM_CONF());

                reg = __raw_readl(IPU_SRM_PRI2) | 0x8;
                __raw_writel(reg, IPU_SRM_PRI2);
                return;
        }

        di = g_dc_di_assignment[dc_chan];

        /* Make sure other DC sync channel is not assigned same DI */
        reg = __raw_readl(DC_WR_CH_CONF(6 - dc_chan));
        if ((di << 2) == (reg & DC_WR_CH_CONF_PROG_DI_ID)) {
                reg &= ~DC_WR_CH_CONF_PROG_DI_ID;
                reg |= di ? 0 : DC_WR_CH_CONF_PROG_DI_ID;
                __raw_writel(reg, DC_WR_CH_CONF(6 - dc_chan));
        }

        reg = __raw_readl(DC_WR_CH_CONF(dc_chan));
        reg |= 4 << DC_WR_CH_CONF_PROG_TYPE_OFFSET;
        __raw_writel(reg, DC_WR_CH_CONF(dc_chan));

        clk_enable(g_pixel_clk[di]);
}

static unsigned char dc_swap;

void ipu_dp_dc_disable(ipu_channel_t channel, unsigned char swap)
{
        uint32_t reg;
        uint32_t csc;
        uint32_t dc_chan = 0;
        int timeout = 50;
        int irq = 0;

        dc_swap = swap;

        if (channel == MEM_DC_SYNC) {
                dc_chan = 1;
                irq = IPU_IRQ_DC_FC_1;
        } else if (channel == MEM_BG_SYNC) {
                dc_chan = 5;
                irq = IPU_IRQ_DP_SF_END;
        } else if (channel == MEM_FG_SYNC) {
                /* Disable FG channel */
                dc_chan = 5;

                reg = __raw_readl(DP_COM_CONF());
                csc = reg & DP_COM_CONF_CSC_DEF_MASK;
                if (csc == DP_COM_CONF_CSC_DEF_FG)
                        reg &= ~DP_COM_CONF_CSC_DEF_MASK;

                reg &= ~DP_COM_CONF_FG_EN;
                __raw_writel(reg, DP_COM_CONF());

                reg = __raw_readl(IPU_SRM_PRI2) | 0x8;
                __raw_writel(reg, IPU_SRM_PRI2);

                timeout = 50;

                /*
                 * Wait for DC triple buffer to empty,
                 * this check is useful for tv overlay.
                 */
                if (g_dc_di_assignment[dc_chan] == 0)
                        while ((__raw_readl(DC_STAT) & 0x00000002)
                               != 0x00000002) {
                                udelay(2000);
                                timeout -= 2;
                                if (timeout <= 0)
                                        break;
                        }
                else if (g_dc_di_assignment[dc_chan] == 1)
                        while ((__raw_readl(DC_STAT) & 0x00000020)
                               != 0x00000020) {
                                udelay(2000);
                                timeout -= 2;
                                if (timeout <= 0)
                                        break;
                        }
                return;
        } else {
                return;
        }

        if (dc_swap) {
                /* Swap DC channel 1 and 5 settings, and disable old dc chan */
                reg = __raw_readl(DC_WR_CH_CONF(dc_chan));
                __raw_writel(reg, DC_WR_CH_CONF(6 - dc_chan));
                reg &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
                reg ^= DC_WR_CH_CONF_PROG_DI_ID;
                __raw_writel(reg, DC_WR_CH_CONF(dc_chan));
        } else {
                /* Make sure that we leave at the irq starting edge */
                __raw_writel(IPUIRQ_2_MASK(irq), IPUIRQ_2_STATREG(irq));
                do {
                        reg = __raw_readl(IPUIRQ_2_STATREG(irq));
                } while (!(reg & IPUIRQ_2_MASK(irq)));

                reg = __raw_readl(DC_WR_CH_CONF(dc_chan));
                reg &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
                __raw_writel(reg, DC_WR_CH_CONF(dc_chan));

                reg = __raw_readl(IPU_DISP_GEN);
                if (g_dc_di_assignment[dc_chan])
                        reg &= ~DI1_COUNTER_RELEASE;
                else
                        reg &= ~DI0_COUNTER_RELEASE;
                __raw_writel(reg, IPU_DISP_GEN);

                /* Clock is already off because it must be done quickly, but
                   we need to fix the ref count */
                clk_disable(g_pixel_clk[g_dc_di_assignment[dc_chan]]);
        }
}

void ipu_init_dc_mappings(void)
{
        /* IPU_PIX_FMT_RGB24 */
        ipu_dc_map_clear(0);
        ipu_dc_map_config(0, 0, 7, 0xFF);
        ipu_dc_map_config(0, 1, 15, 0xFF);
        ipu_dc_map_config(0, 2, 23, 0xFF);

        /* IPU_PIX_FMT_RGB666 */
        ipu_dc_map_clear(1);
        ipu_dc_map_config(1, 0, 5, 0xFC);
        ipu_dc_map_config(1, 1, 11, 0xFC);
        ipu_dc_map_config(1, 2, 17, 0xFC);

        /* IPU_PIX_FMT_YUV444 */
        ipu_dc_map_clear(2);
        ipu_dc_map_config(2, 0, 15, 0xFF);
        ipu_dc_map_config(2, 1, 23, 0xFF);
        ipu_dc_map_config(2, 2, 7, 0xFF);

        /* IPU_PIX_FMT_RGB565 */
        ipu_dc_map_clear(3);
        ipu_dc_map_config(3, 0, 4, 0xF8);
        ipu_dc_map_config(3, 1, 10, 0xFC);
        ipu_dc_map_config(3, 2, 15, 0xF8);

        /* IPU_PIX_FMT_LVDS666 */
        ipu_dc_map_clear(4);
        ipu_dc_map_config(4, 0, 5, 0xFC);
        ipu_dc_map_config(4, 1, 13, 0xFC);
        ipu_dc_map_config(4, 2, 21, 0xFC);
}

static int ipu_pixfmt_to_map(uint32_t fmt)
{
        switch (fmt) {
        case IPU_PIX_FMT_GENERIC:
        case IPU_PIX_FMT_RGB24:
                return 0;
        case IPU_PIX_FMT_RGB666:
                return 1;
        case IPU_PIX_FMT_YUV444:
                return 2;
        case IPU_PIX_FMT_RGB565:
                return 3;
        case IPU_PIX_FMT_LVDS666:
                return 4;
        }

        return -1;
}

/*
 * This function is called to initialize a synchronous LCD panel.
 *
 * @param       disp            The DI the panel is attached to.
 *
 * @param       pixel_clk       Desired pixel clock frequency in Hz.
 *
 * @param       pixel_fmt       Input parameter for pixel format of buffer.
 *                              Pixel format is a FOURCC ASCII code.
 *
 * @param       width           The width of panel in pixels.
 *
 * @param       height          The height of panel in pixels.
 *
 * @param       hStartWidth     The number of pixel clocks between the HSYNC
 *                              signal pulse and the start of valid data.
 *
 * @param       hSyncWidth      The width of the HSYNC signal in units of pixel
 *                              clocks.
 *
 * @param       hEndWidth       The number of pixel clocks between the end of
 *                              valid data and the HSYNC signal for next line.
 *
 * @param       vStartWidth     The number of lines between the VSYNC
 *                              signal pulse and the start of valid data.
 *
 * @param       vSyncWidth      The width of the VSYNC signal in units of lines
 *
 * @param       vEndWidth       The number of lines between the end of valid
 *                              data and the VSYNC signal for next frame.
 *
 * @param       sig             Bitfield of signal polarities for LCD interface.
 *
 * @return      This function returns 0 on success or negative error code on
 *              fail.
 */

int32_t ipu_init_sync_panel(int disp, uint32_t pixel_clk,
                            uint16_t width, uint16_t height,
                            uint32_t pixel_fmt,
                            uint16_t h_start_width, uint16_t h_sync_width,
                            uint16_t h_end_width, uint16_t v_start_width,
                            uint16_t v_sync_width, uint16_t v_end_width,
                            uint32_t v_to_h_sync, ipu_di_signal_cfg_t sig)
{
        uint32_t reg;
        uint32_t di_gen, vsync_cnt;
        uint32_t div, rounded_pixel_clk;
        uint32_t h_total, v_total;
        int map;
        struct clk *di_parent;

        debug("panel size = %d x %d\n", width, height);

        if ((v_sync_width == 0) || (h_sync_width == 0))
                return -EINVAL;

        /* adapt panel to ipu restricitions */
        if (v_end_width < 2) {
                v_end_width = 2;
                puts("WARNING: v_end_width (lower_margin) must be >= 2, adjusted\n");
        }

        h_total = width + h_sync_width + h_start_width + h_end_width;
        v_total = height + v_sync_width + v_start_width + v_end_width;

        /* Init clocking */
        debug("pixel clk = %dHz\n", pixel_clk);

        if (sig.ext_clk) {
                if (!(g_di1_tvout && (disp == 1))) { /*not round div for tvout*/
                        /*
                         * Set the  PLL to be an even multiple
                         * of the pixel clock.
                         */
                        if ((clk_get_usecount(g_pixel_clk[0]) == 0) &&
                                (clk_get_usecount(g_pixel_clk[1]) == 0)) {
                                di_parent = clk_get_parent(g_di_clk[disp]);
                                rounded_pixel_clk =
                                        clk_round_rate(g_pixel_clk[disp],
                                                pixel_clk);
                                div  = clk_get_rate(di_parent) /
                                        rounded_pixel_clk;
                                if (div % 2)
                                        div++;
                                if (clk_get_rate(di_parent) != div *
                                        rounded_pixel_clk)
                                        clk_set_rate(di_parent,
                                                div * rounded_pixel_clk);
                                udelay(10000);
                                clk_set_rate(g_di_clk[disp],
                                        2 * rounded_pixel_clk);
                                udelay(10000);
                        }
                }
                clk_set_parent(g_pixel_clk[disp], g_ldb_clk);
        } else {
                if (clk_get_usecount(g_pixel_clk[disp]) != 0)
                        clk_set_parent(g_pixel_clk[disp], g_ipu_clk);
        }
        rounded_pixel_clk = clk_round_rate(g_pixel_clk[disp], pixel_clk);
        clk_set_rate(g_pixel_clk[disp], rounded_pixel_clk);
        udelay(5000);
        /* Get integer portion of divider */
        div = clk_get_rate(clk_get_parent(g_pixel_clk[disp])) /
                rounded_pixel_clk;

        ipu_di_data_wave_config(disp, SYNC_WAVE, div - 1, div - 1);
        ipu_di_data_pin_config(disp, SYNC_WAVE, DI_PIN15, 3, 0, div * 2);

        map = ipu_pixfmt_to_map(pixel_fmt);
        if (map < 0) {
                debug("IPU_DISP: No MAP\n");
                return -EINVAL;
        }

        di_gen = __raw_readl(DI_GENERAL(disp));

        if (sig.interlaced) {
                /* Setup internal HSYNC waveform */
                ipu_di_sync_config(
                                disp,           /* display */
                                1,              /* counter */
                                h_total / 2 - 1,/* run count */
                                DI_SYNC_CLK,    /* run_resolution */
                                0,              /* offset */
                                DI_SYNC_NONE,   /* offset resolution */
                                0,              /* repeat count */
                                DI_SYNC_NONE,   /* CNT_CLR_SEL */
                                0,              /* CNT_POLARITY_GEN_EN */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL */
                                0,              /* COUNT UP */
                                0               /* COUNT DOWN */
                                );

                /* Field 1 VSYNC waveform */
                ipu_di_sync_config(
                                disp,           /* display */
                                2,              /* counter */
                                h_total - 1,    /* run count */
                                DI_SYNC_CLK,    /* run_resolution */
                                0,              /* offset */
                                DI_SYNC_NONE,   /* offset resolution */
                                0,              /* repeat count */
                                DI_SYNC_NONE,   /* CNT_CLR_SEL */
                                0,              /* CNT_POLARITY_GEN_EN */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL */
                                0,              /* COUNT UP */
                                4               /* COUNT DOWN */
                                );

                /* Setup internal HSYNC waveform */
                ipu_di_sync_config(
                                disp,           /* display */
                                3,              /* counter */
                                v_total * 2 - 1,/* run count */
                                DI_SYNC_INT_HSYNC,      /* run_resolution */
                                1,              /* offset */
                                DI_SYNC_INT_HSYNC,      /* offset resolution */
                                0,              /* repeat count */
                                DI_SYNC_NONE,   /* CNT_CLR_SEL */
                                0,              /* CNT_POLARITY_GEN_EN */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL */
                                0,              /* COUNT UP */
                                4               /* COUNT DOWN */
                                );

                /* Active Field ? */
                ipu_di_sync_config(
                                disp,           /* display */
                                4,              /* counter */
                                v_total / 2 - 1,/* run count */
                                DI_SYNC_HSYNC,  /* run_resolution */
                                v_start_width,  /*  offset */
                                DI_SYNC_HSYNC,  /* offset resolution */
                                2,              /* repeat count */
                                DI_SYNC_VSYNC,  /* CNT_CLR_SEL */
                                0,              /* CNT_POLARITY_GEN_EN */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL */
                                0,              /* COUNT UP */
                                0               /* COUNT DOWN */
                                );

                /* Active Line */
                ipu_di_sync_config(
                                disp,           /* display */
                                5,              /* counter */
                                0,              /* run count */
                                DI_SYNC_HSYNC,  /* run_resolution */
                                0,              /*  offset */
                                DI_SYNC_NONE,   /* offset resolution */
                                height / 2,     /* repeat count */
                                4,              /* CNT_CLR_SEL */
                                0,              /* CNT_POLARITY_GEN_EN */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL */
                                0,              /* COUNT UP */
                                0               /* COUNT DOWN */
                                );

                /* Field 0 VSYNC waveform */
                ipu_di_sync_config(
                                disp,           /* display */
                                6,              /* counter */
                                v_total - 1,    /* run count */
                                DI_SYNC_HSYNC,  /* run_resolution */
                                0,              /* offset */

                                DI_SYNC_NONE,   /* offset resolution */
                                0,              /* repeat count */
                                DI_SYNC_NONE,   /* CNT_CLR_SEL  */
                                0,              /* CNT_POLARITY_GEN_EN */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL */
                                0,              /* COUNT UP */
                                0               /* COUNT DOWN */
                                );

                /* DC VSYNC waveform */
                vsync_cnt = 7;
                ipu_di_sync_config(
                                disp,           /* display */
                                7,              /* counter */
                                v_total / 2 - 1,/* run count */
                                DI_SYNC_HSYNC,  /* run_resolution  */
                                9,              /* offset  */
                                DI_SYNC_HSYNC,  /* offset resolution */
                                2,              /* repeat count */
                                DI_SYNC_VSYNC,  /* CNT_CLR_SEL */
                                0,              /* CNT_POLARITY_GEN_EN */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL */
                                0,              /* COUNT UP */
                                0               /* COUNT DOWN */
                                );

                /* active pixel waveform */
                ipu_di_sync_config(
                                disp,           /* display */
                                8,              /* counter */
                                0,              /* run count  */
                                DI_SYNC_CLK,    /* run_resolution */
                                h_start_width,  /* offset  */
                                DI_SYNC_CLK,    /* offset resolution */
                                width,          /* repeat count  */
                                5,              /* CNT_CLR_SEL  */
                                0,              /* CNT_POLARITY_GEN_EN  */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL  */
                                0,              /* COUNT UP  */
                                0               /* COUNT DOWN */
                                );

                ipu_di_sync_config(
                                disp,           /* display */
                                9,              /* counter */
                                v_total - 1,    /* run count */
                                DI_SYNC_INT_HSYNC,/* run_resolution */
                                v_total / 2,    /* offset  */
                                DI_SYNC_INT_HSYNC,/* offset resolution  */
                                0,              /* repeat count */
                                DI_SYNC_HSYNC,  /* CNT_CLR_SEL */
                                0,              /* CNT_POLARITY_GEN_EN  */
                                DI_SYNC_NONE,   /* CNT_POLARITY_CLR_SEL  */
                                DI_SYNC_NONE,   /* CNT_POLARITY_TRIGGER_SEL */
                                0,              /* COUNT UP */
                                4               /* COUNT DOWN */
                                );

                /* set gentime select and tag sel */
                reg = __raw_readl(DI_SW_GEN1(disp, 9));
                reg &= 0x1FFFFFFF;
                reg |= (3 - 1)<<29 | 0x00008000;
                __raw_writel(reg, DI_SW_GEN1(disp, 9));

                __raw_writel(v_total / 2 - 1, DI_SCR_CONF(disp));

                /* set y_sel = 1 */
                di_gen |= 0x10000000;
                di_gen |= DI_GEN_POLARITY_5;
                di_gen |= DI_GEN_POLARITY_8;
        } else {
                /* Setup internal HSYNC waveform */
                ipu_di_sync_config(disp, 1, h_total - 1, DI_SYNC_CLK,
                                0, DI_SYNC_NONE, 0, DI_SYNC_NONE,
                                0, DI_SYNC_NONE,
                                DI_SYNC_NONE, 0, 0);

                /* Setup external (delayed) HSYNC waveform */
                ipu_di_sync_config(disp, DI_SYNC_HSYNC, h_total - 1,
                                DI_SYNC_CLK, div * v_to_h_sync, DI_SYNC_CLK,
                                0, DI_SYNC_NONE, 1, DI_SYNC_NONE,
                                DI_SYNC_CLK, 0, h_sync_width * 2);
                /* Setup VSYNC waveform */
                vsync_cnt = DI_SYNC_VSYNC;
                ipu_di_sync_config(disp, DI_SYNC_VSYNC, v_total - 1,
                                DI_SYNC_INT_HSYNC, 0, DI_SYNC_NONE, 0,
                                DI_SYNC_NONE, 1, DI_SYNC_NONE,
                                DI_SYNC_INT_HSYNC, 0, v_sync_width * 2);
                __raw_writel(v_total - 1, DI_SCR_CONF(disp));

                /* Setup active data waveform to sync with DC */
                ipu_di_sync_config(disp, 4, 0, DI_SYNC_HSYNC,
                                v_sync_width + v_start_width, DI_SYNC_HSYNC,
                                height,
                                DI_SYNC_VSYNC, 0, DI_SYNC_NONE,
                                DI_SYNC_NONE, 0, 0);
                ipu_di_sync_config(disp, 5, 0, DI_SYNC_CLK,
                                h_sync_width + h_start_width, DI_SYNC_CLK,
                                width, 4, 0, DI_SYNC_NONE, DI_SYNC_NONE, 0,
                                0);

                /* reset all unused counters */
                __raw_writel(0, DI_SW_GEN0(disp, 6));
                __raw_writel(0, DI_SW_GEN1(disp, 6));
                __raw_writel(0, DI_SW_GEN0(disp, 7));
                __raw_writel(0, DI_SW_GEN1(disp, 7));
                __raw_writel(0, DI_SW_GEN0(disp, 8));
                __raw_writel(0, DI_SW_GEN1(disp, 8));
                __raw_writel(0, DI_SW_GEN0(disp, 9));
                __raw_writel(0, DI_SW_GEN1(disp, 9));

                reg = __raw_readl(DI_STP_REP(disp, 6));
                reg &= 0x0000FFFF;
                __raw_writel(reg, DI_STP_REP(disp, 6));
                __raw_writel(0, DI_STP_REP(disp, 7));
                __raw_writel(0, DI_STP_REP9(disp));

                /* Init template microcode */
                if (disp) {
                   ipu_dc_write_tmpl(2, WROD(0), 0, map, SYNC_WAVE, 8, 5);
                   ipu_dc_write_tmpl(3, WROD(0), 0, map, SYNC_WAVE, 4, 5);
                   ipu_dc_write_tmpl(4, WROD(0), 0, map, SYNC_WAVE, 0, 5);
                } else {
                   ipu_dc_write_tmpl(5, WROD(0), 0, map, SYNC_WAVE, 8, 5);
                   ipu_dc_write_tmpl(6, WROD(0), 0, map, SYNC_WAVE, 4, 5);
                   ipu_dc_write_tmpl(7, WROD(0), 0, map, SYNC_WAVE, 0, 5);
                }

                if (sig.Hsync_pol)
                        di_gen |= DI_GEN_POLARITY_2;
                if (sig.Vsync_pol)
                        di_gen |= DI_GEN_POLARITY_3;

                if (!sig.clk_pol)
                        di_gen |= DI_GEN_POL_CLK;

        }

        __raw_writel(di_gen, DI_GENERAL(disp));

        __raw_writel((--vsync_cnt << DI_VSYNC_SEL_OFFSET) |
                        0x00000002, DI_SYNC_AS_GEN(disp));

        reg = __raw_readl(DI_POL(disp));
        reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
        if (sig.enable_pol)
                reg |= DI_POL_DRDY_POLARITY_15;
        if (sig.data_pol)
                reg |= DI_POL_DRDY_DATA_POLARITY;
        __raw_writel(reg, DI_POL(disp));

        __raw_writel(width, DC_DISP_CONF2(DC_DISP_ID_SYNC(disp)));

        return 0;
}

/*
 * This function sets the foreground and background plane global alpha blending
 * modes. This function also sets the DP graphic plane according to the
 * parameter of IPUv3 DP channel.
 *
 * @param       channel         IPUv3 DP channel
 *
 * @param       enable          Boolean to enable or disable global alpha
 *                              blending. If disabled, local blending is used.
 *
 * @param       alpha           Global alpha value.
 *
 * @return      Returns 0 on success or negative error code on fail
 */
int32_t ipu_disp_set_global_alpha(ipu_channel_t channel, unsigned char enable,
                                  uint8_t alpha)
{
        uint32_t reg;

        unsigned char bg_chan;

        if (!((channel == MEM_BG_SYNC || channel == MEM_FG_SYNC) ||
                (channel == MEM_BG_ASYNC0 || channel == MEM_FG_ASYNC0) ||
                (channel == MEM_BG_ASYNC1 || channel == MEM_FG_ASYNC1)))
                return -EINVAL;

        if (channel == MEM_BG_SYNC || channel == MEM_BG_ASYNC0 ||
            channel == MEM_BG_ASYNC1)
                bg_chan = 1;
        else
                bg_chan = 0;

        if (!g_ipu_clk_enabled)
                clk_enable(g_ipu_clk);

        if (bg_chan) {
                reg = __raw_readl(DP_COM_CONF());
                __raw_writel(reg & ~DP_COM_CONF_GWSEL, DP_COM_CONF());
        } else {
                reg = __raw_readl(DP_COM_CONF());
                __raw_writel(reg | DP_COM_CONF_GWSEL, DP_COM_CONF());
        }

        if (enable) {
                reg = __raw_readl(DP_GRAPH_WIND_CTRL()) & 0x00FFFFFFL;
                __raw_writel(reg | ((uint32_t) alpha << 24),
                             DP_GRAPH_WIND_CTRL());

                reg = __raw_readl(DP_COM_CONF());
                __raw_writel(reg | DP_COM_CONF_GWAM, DP_COM_CONF());
        } else {
                reg = __raw_readl(DP_COM_CONF());
                __raw_writel(reg & ~DP_COM_CONF_GWAM, DP_COM_CONF());
        }

        reg = __raw_readl(IPU_SRM_PRI2) | 0x8;
        __raw_writel(reg, IPU_SRM_PRI2);

        if (!g_ipu_clk_enabled)
                clk_disable(g_ipu_clk);

        return 0;
}

/*
 * This function sets the transparent color key for SDC graphic plane.
 *
 * @param       channel         Input parameter for the logical channel ID.
 *
 * @param       enable          Boolean to enable or disable color key
 *
 * @param       colorKey        24-bit RGB color for transparent color key.
 *
 * @return      Returns 0 on success or negative error code on fail
 */
int32_t ipu_disp_set_color_key(ipu_channel_t channel, unsigned char enable,
                               uint32_t color_key)
{
        uint32_t reg;
        int y, u, v;
        int red, green, blue;

        if (!((channel == MEM_BG_SYNC || channel == MEM_FG_SYNC) ||
                (channel == MEM_BG_ASYNC0 || channel == MEM_FG_ASYNC0) ||
                (channel == MEM_BG_ASYNC1 || channel == MEM_FG_ASYNC1)))
                return -EINVAL;

        if (!g_ipu_clk_enabled)
                clk_enable(g_ipu_clk);

        color_key_4rgb = 1;
        /* Transform color key from rgb to yuv if CSC is enabled */
        if (((fg_csc_type == RGB2YUV) && (bg_csc_type == YUV2YUV)) ||
                ((fg_csc_type == YUV2YUV) && (bg_csc_type == RGB2YUV)) ||
                ((fg_csc_type == YUV2YUV) && (bg_csc_type == YUV2YUV)) ||
                ((fg_csc_type == YUV2RGB) && (bg_csc_type == YUV2RGB))) {

                debug("color key 0x%x need change to yuv fmt\n", color_key);

                red = (color_key >> 16) & 0xFF;
                green = (color_key >> 8) & 0xFF;
                blue = color_key & 0xFF;

                y = rgb_to_yuv(0, red, green, blue);
                u = rgb_to_yuv(1, red, green, blue);
                v = rgb_to_yuv(2, red, green, blue);
                color_key = (y << 16) | (u << 8) | v;

                color_key_4rgb = 0;

                debug("color key change to yuv fmt 0x%x\n", color_key);
        }

        if (enable) {
                reg = __raw_readl(DP_GRAPH_WIND_CTRL()) & 0xFF000000L;
                __raw_writel(reg | color_key, DP_GRAPH_WIND_CTRL());

                reg = __raw_readl(DP_COM_CONF());
                __raw_writel(reg | DP_COM_CONF_GWCKE, DP_COM_CONF());
        } else {
                reg = __raw_readl(DP_COM_CONF());
                __raw_writel(reg & ~DP_COM_CONF_GWCKE, DP_COM_CONF());
        }

        reg = __raw_readl(IPU_SRM_PRI2) | 0x8;
        __raw_writel(reg, IPU_SRM_PRI2);

        if (!g_ipu_clk_enabled)
                clk_disable(g_ipu_clk);

        return 0;
}