path: root/drivers/video/sprdfb/dsi_1_10a/mipi_dsih_api.c

#include "mipi_dsih_api.h"
#include "mipi_dsih_hal.h"
#include "mipi_dsih_dphy.h"
#include "../sprdfb.h"
#include <linux/delay.h>

/* whether to get debug messages (1) or not (0) */
#define DEBUG                   0

#define PRECISION_FACTOR        1000
#define VIDEO_PACKET_OVERHEAD   6
#define NULL_PACKET_OVERHEAD    6
#define SHORT_PACKET            4
#define BLANKING_PACKET         6
#define MAX_NULL_SIZE           1023

static const uint32_t mipi_dsih_supported_versions[] = {0x3130302A, 0x3130312A, 0x3131302A};
static const uint32_t mipi_dsih_no_of_versions = sizeof(mipi_dsih_supported_versions) / sizeof(uint32_t);

/*
func:mipi_dsih_set_lp_clock
desc:in low-power mode, max PHY frequency should smaller than 20MHz,
     in synopsys IP, low-power clock divide from high-speed clock,
     this function is designed to adapt low-power clock to various high-speed clock.
arithmetic:
     Fhs : high-speed frequence
     Flp : low-power frequence
     div : mipi_dsih_hal_tx_escape_division() param, byte clock unit.
     because of the 20MHz demand, Flp == Fhs/(div*8) <= 20 MHz, here 500000 present 500MHz, so MHz equal 1000
     so div >= { Fhs/(20Mhz*8) == Fhs/(20000*8) == (Fhs>>4)/10000 }
*/
static void mipi_dsih_set_lp_clock(dsih_ctrl_t * instance)
{
	uint32_t tx_escape_division = 1;
	tx_escape_division = (instance->phy_feq>>4);
	tx_escape_division = (tx_escape_division+9999)/10000;//ceiling calc
	printk("sprdfb: [%s]: lp frequence div:%d\n", __func__, tx_escape_division);
	mipi_dsih_hal_tx_escape_division(instance, (uint8_t)tx_escape_division);
}

dsih_error_t mipi_dsih_open(dsih_ctrl_t * instance)
{
    dsih_error_t err = OK;
    uint32_t version = 0;
    int i = 0;

    if (instance == 0)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    else if ((instance->core_read_function == 0) || (instance->core_write_function == 0))
    {
        return ERR_DSI_INVALID_IO;
    }
    else if (instance->status == INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    else if (mipi_dsih_dphy_open(&(instance->phy_instance)))
    {
        return ERR_DSI_PHY_INVALID;
    }
    else
    {
        instance->status = NOT_INITIALIZED;
        version = mipi_dsih_hal_get_version(instance);
        for (i = 0; i < mipi_dsih_no_of_versions; i++)
        {
            if (version == mipi_dsih_supported_versions[i])
            {
                break;
            }
        }
        /* no matching supported version has been found*/
        if (i >= mipi_dsih_no_of_versions)
        {
            if (instance->log_info != 0)
            {
                instance->log_info("sprdfb: driver does not support this core version 0x%lX", version);
            }
            return ERR_DSI_CORE_INCOMPATIBLE;
        }
    }
    //mipi_dsih_hal_power(instance, 0);//Jessica
    //mipi_dsih_hal_power(instance, 1);//Jessica
    mipi_dsih_hal_dpi_color_mode_pol(instance, !instance->color_mode_polarity);
    mipi_dsih_hal_dpi_shut_down_pol(instance, !instance->shut_down_polarity);
    err = mipi_dsih_phy_hs2lp_config(instance, instance->max_hs_to_lp_cycles);
    err |=  mipi_dsih_phy_lp2hs_config(instance, instance->max_lp_to_hs_cycles);
    err |= mipi_dsih_phy_bta_time(instance, instance->max_bta_cycles);
    if (err)
    {
        return ERR_DSI_OVERFLOW;
    }
    /* by default, return to LP during ALL, unless otherwise specified*/
    mipi_dsih_hal_dpi_lp_during_hfp(instance, 1);
    mipi_dsih_hal_dpi_lp_during_hbp(instance, 1);
    mipi_dsih_hal_dpi_lp_during_vactive(instance, 1);
    mipi_dsih_hal_dpi_lp_during_vfp(instance, 1);
    mipi_dsih_hal_dpi_lp_during_vbp(instance, 1);
    mipi_dsih_hal_dpi_lp_during_vsync(instance, 1);
    /* by default, all commands are sent in LP */
    mipi_dsih_hal_dcs_wr_tx_type(instance, 0, 1);
    mipi_dsih_hal_dcs_wr_tx_type(instance, 1, 1);
    mipi_dsih_hal_dcs_wr_tx_type(instance, 3, 1); /* long packet*/
    mipi_dsih_hal_dcs_rd_tx_type(instance, 0, 1);
    /*Jessica add to support max rd packet size command*/
    mipi_dsih_hal_max_rd_packet_size_type(instance, 1);
    mipi_dsih_hal_gen_wr_tx_type(instance, 0, 1);
    mipi_dsih_hal_gen_wr_tx_type(instance, 1, 1);
    mipi_dsih_hal_gen_wr_tx_type(instance, 2, 1);
    mipi_dsih_hal_gen_wr_tx_type(instance, 3, 1); /* long packet*/
    mipi_dsih_hal_gen_rd_tx_type(instance, 0, 1);
    mipi_dsih_hal_gen_rd_tx_type(instance, 1, 1);
    mipi_dsih_hal_gen_rd_tx_type(instance, 2, 1);
    /* by default, RX_VC = 0, NO EOTp, EOTn, BTA, ECC rx and CRC rx */
    mipi_dsih_hal_gen_rd_vc(instance, 0);
    mipi_dsih_hal_gen_eotp_rx_en(instance, 0);
    mipi_dsih_hal_gen_eotp_tx_en(instance, 0);
    mipi_dsih_hal_bta_en(instance, 0);
    mipi_dsih_hal_gen_ecc_rx_en(instance, 0);
    mipi_dsih_hal_gen_crc_rx_en(instance, 0);
    mipi_dsih_hal_power(instance, 0);//Jessica
    mipi_dsih_hal_power(instance, 1);//Jessica
    /* initialize pll so escape clocks could be generated at 864MHz, 1 lane */
    /* however the high speed clock will not be requested */
    //err = mipi_dsih_dphy_configure(&(instance->phy_instance), 1, DEFAULT_BYTE_CLOCK);
#if 0
    err = mipi_dsih_dphy_configure(&(instance->phy_instance), instance->max_lanes, 190*1000);
    if (err)
    {
        return err; /* ERR_DSI_PHY_POWERUP; */
    }
#endif
    /* dividing by 6 is aimed for max PHY frequency, 1GHz */
    //mipi_dsih_hal_tx_escape_division(instance, 4); //6    //Jessica
    mipi_dsih_set_lp_clock(instance);
    instance->status = INITIALIZED;
    return OK;
}
dsih_error_t mipi_dsih_close(dsih_ctrl_t * instance)
{
    if (instance == 0)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (instance->status != INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    mipi_dsih_dphy_close(&(instance->phy_instance));
    mipi_dsih_hal_power(instance, 0);
    return OK;
}
void mipi_dsih_allow_return_to_lp(dsih_ctrl_t * instance, int hfp, int hbp, int vactive, int vfp, int vbp, int vsync)
{
    if(0 == instance)
    {
        return;
    }

    if (instance->status == INITIALIZED)
    {
        mipi_dsih_hal_dpi_lp_during_hfp(instance, hfp);
        mipi_dsih_hal_dpi_lp_during_hbp(instance, hbp);
        mipi_dsih_hal_dpi_lp_during_vactive(instance, vactive);
        mipi_dsih_hal_dpi_lp_during_vfp(instance, vfp);
        mipi_dsih_hal_dpi_lp_during_vbp(instance, vbp);
        mipi_dsih_hal_dpi_lp_during_vsync(instance, vsync);
        return;
    }

    if (instance->log_error != 0)
    {
        instance->log_error("sprdfb: invalid instance");
    }
}
void mipi_dsih_dcs_cmd_lp_transmission(dsih_ctrl_t * instance, int long_write, int short_write, int short_read)
{
    if(0 == instance)
    {
        return;
    }

    if (instance->status == INITIALIZED)
    {
        mipi_dsih_hal_dcs_wr_tx_type(instance, 0, short_write);
        mipi_dsih_hal_dcs_wr_tx_type(instance, 1, short_write);
        mipi_dsih_hal_dcs_wr_tx_type(instance, 3, long_write); /* long packet*/
        mipi_dsih_hal_dcs_rd_tx_type(instance, 0, short_read);
        return;
    }

    if (instance->log_error != 0)
    {
        instance->log_error("sprdfb: invalid instance");
    }
}
void mipi_dsih_gen_cmd_lp_transmission(dsih_ctrl_t * instance, int long_write, int short_write, int short_read)
{
    if(0 == instance)
    {
        return;
    }

    if (instance->status == INITIALIZED)
    {
        mipi_dsih_hal_gen_wr_tx_type(instance, 0, short_write);
        mipi_dsih_hal_gen_wr_tx_type(instance, 1, short_write);
        mipi_dsih_hal_gen_wr_tx_type(instance, 2, short_write);
        mipi_dsih_hal_gen_wr_tx_type(instance, 3, long_write); /* long packet*/
        mipi_dsih_hal_gen_rd_tx_type(instance, 0, short_read);
        mipi_dsih_hal_gen_rd_tx_type(instance, 1, short_read);
        mipi_dsih_hal_gen_rd_tx_type(instance, 2, short_read);
        return;
    }
    
    if (instance->log_error != 0)
    {
        instance->log_error("sprdfb: invalid instance");
    }
}
/* packet handling */
dsih_error_t mipi_dsih_enable_rx(dsih_ctrl_t * instance, int enable)
{
    mipi_dsih_hal_bta_en(instance, enable);
    return OK;
}
dsih_error_t mipi_dsih_peripheral_ack(dsih_ctrl_t * instance, int enable)
{
    if (instance != 0)
    {
        if (instance->status == INITIALIZED)
        {
            mipi_dsih_hal_cmd_ack_en(instance, enable);
            if (enable)
            {
                mipi_dsih_hal_bta_en(instance, 1);
            }
            return OK;
        }
    }
    return ERR_DSI_INVALID_INSTANCE;
}
dsih_error_t mipi_dsih_tear_effect_ack(dsih_ctrl_t * instance, int enable)
{
    if (instance != 0)
    {
        if (instance->status == INITIALIZED)
        {
            mipi_dsih_hal_tear_effect_ack_en(instance, enable);
            if (enable)
            {
                mipi_dsih_hal_bta_en(instance, 1);
            }
            return OK;
        }
    }
    return ERR_DSI_INVALID_INSTANCE;
}
dsih_error_t mipi_dsih_eotp_rx(dsih_ctrl_t * instance, int enable)
{
    if (instance != 0)
    {
        if (instance->status == INITIALIZED)
        {
            mipi_dsih_hal_gen_eotp_rx_en(instance, enable);
            if (enable)
            {
                mipi_dsih_hal_bta_en(instance, 1);
            }
            return OK;
        }
    }
    return ERR_DSI_INVALID_INSTANCE;
}
dsih_error_t mipi_dsih_ecc_rx(dsih_ctrl_t * instance, int enable)
{
    if (instance != 0)
    {
        if (instance->status == INITIALIZED)
        {
            mipi_dsih_hal_gen_ecc_rx_en(instance, enable);
            if (enable)
            {
                mipi_dsih_hal_bta_en(instance, 1);
            }
            return OK;
        }
    }
    return ERR_DSI_INVALID_INSTANCE;
}
dsih_error_t mipi_dsih_eotp_tx(dsih_ctrl_t * instance, int enable)
{
    if (instance != 0)
    {
        if (instance->status == INITIALIZED)
        {
            mipi_dsih_hal_gen_eotp_tx_en(instance, enable);
            return OK;
        }
    }
    return ERR_DSI_INVALID_INSTANCE;
}
dsih_error_t mipi_dsih_dpi_video(dsih_ctrl_t * instance, dsih_dpi_video_t * video_params)
{
    dsih_error_t err_code = OK;
    uint16_t bytes_per_pixel_x100 = 0; /* bpp x 100 because it can be 2.25 */
    uint16_t video_size = 0;
    uint32_t ratio_clock_xPF = 0; /* holds dpi clock/byte clock times precision factor */
    uint16_t null_packet_size = 0;
    uint8_t video_size_step = 1;
    uint32_t hs_timeout = 0;
    uint32_t total_bytes = 0;
    uint32_t bytes_per_chunk = 0;
    uint32_t no_of_chunks = 0;
    uint32_t bytes_left = 0;
    uint32_t chunk_overhead = 0;
    int counter = 0;
    /* check DSI controller instance */
    if ((instance == 0) || (video_params == 0))
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (instance->status != INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    /* set up phy pll to required lane clock */
    //begin--frank 
    //err_code = mipi_dsih_dphy_configure(&(instance->phy_instance), video_params->no_of_lanes, video_params->byte_clock * 8);
    //if (err_code)
    //{
    //    return err_code;
    //}
    //end--frank
    ratio_clock_xPF = (video_params->byte_clock * PRECISION_FACTOR) / (video_params->pixel_clock);
    video_size = video_params->h_active_pixels;
    /* set up ACKs and error reporting */
    mipi_dsih_hal_dpi_frame_ack_en(instance, video_params->receive_ack_packets);
    if (video_params->receive_ack_packets)
    { /* if ACK is requested, enable BTA, otherwise leave as is */
        mipi_dsih_hal_bta_en(instance, 1);
    }
    mipi_dsih_hal_gen_cmd_mode_en(instance, 0);
    mipi_dsih_hal_dpi_video_mode_en(instance, 1);
    /* get bytes per pixel and video size step (depending if loosely or not */
    switch (video_params->color_coding)
    {
        case COLOR_CODE_16BIT_CONFIG1:
        case COLOR_CODE_16BIT_CONFIG2:
        case COLOR_CODE_16BIT_CONFIG3:
            bytes_per_pixel_x100 = 200;
            video_size_step = 1;
            break;
        case COLOR_CODE_18BIT_CONFIG1:
        case COLOR_CODE_18BIT_CONFIG2:
            mipi_dsih_hal_dpi_18_loosely_packet_en(instance, video_params->is_18_loosely);
            bytes_per_pixel_x100 = 225;
            if (!video_params->is_18_loosely)
            { /* 18bits per pixel and NOT loosely, packets should be multiples of 4 */
                video_size_step = 4;
                /* round up active H pixels to a multiple of 4 */
                for (; (video_size % 4) != 0; video_size++)
                {
                    ;
                }
            }
            else
            {
                video_size_step = 1;
            }
            break;
        case COLOR_CODE_24BIT:
            bytes_per_pixel_x100 = 300;
            video_size_step = 1;
            break;
        default:
            if (instance->log_error != 0)
            {
                instance->log_error("sprdfb: invalid color coding");
            }
            err_code = ERR_DSI_COLOR_CODING;
            break;
    }
    if (err_code == OK)
    {
        err_code = mipi_dsih_hal_dpi_color_coding(instance, video_params->color_coding);
    }
    if (err_code != OK)
    {
        return err_code;
    }
    mipi_dsih_hal_dpi_video_mode_type(instance, video_params->video_mode);
    mipi_dsih_hal_dpi_hline(instance, (uint16_t)(((video_params->h_total_pixels) * ratio_clock_xPF) / PRECISION_FACTOR));
    mipi_dsih_hal_dpi_hbp(instance, ((video_params->h_back_porch_pixels * ratio_clock_xPF) / PRECISION_FACTOR));
    mipi_dsih_hal_dpi_hsa(instance, ((video_params->h_sync_pixels * ratio_clock_xPF) / PRECISION_FACTOR));
    mipi_dsih_hal_dpi_vactive(instance, video_params->v_active_lines);
    mipi_dsih_hal_dpi_vfp(instance, video_params->v_total_lines - (video_params->v_back_porch_lines + video_params->v_sync_lines + video_params->v_active_lines));
    mipi_dsih_hal_dpi_vbp(instance, video_params->v_back_porch_lines);
    mipi_dsih_hal_dpi_vsync(instance, video_params->v_sync_lines);
    mipi_dsih_hal_dpi_hsync_pol(instance, !video_params->h_polarity);
    mipi_dsih_hal_dpi_vsync_pol(instance, !video_params->v_polarity);
    mipi_dsih_hal_dpi_dataen_pol(instance, !video_params->data_en_polarity);
    /* HS timeout */
    hs_timeout = ((video_params->h_total_pixels * video_params->v_active_lines) + (DSIH_PIXEL_TOLERANCE * bytes_per_pixel_x100) / 100);
    for (counter = 0x80; (counter < hs_timeout) && (counter > 2); counter--)
    {
        if ((hs_timeout % counter) == 0)
        {
            mipi_dsih_hal_timeout_clock_division(instance, counter);
            mipi_dsih_hal_lp_rx_timeout(instance, (uint16_t)(hs_timeout / counter));
            mipi_dsih_hal_hs_tx_timeout(instance, (uint16_t)(hs_timeout / counter));
            break;
        }
    }
    /* TX_ESC_CLOCK_DIV must be less than 20000KHz */
    //mipi_dsih_hal_tx_escape_division(instance, 4); //6 //Jessia
    mipi_dsih_set_lp_clock(instance);
    /* video packetisation */
    if (video_params->video_mode == VIDEO_BURST_WITH_SYNC_PULSES)
    { /* BURST */
        mipi_dsih_hal_dpi_null_packet_en(instance, 0);
        mipi_dsih_hal_dpi_multi_packet_en(instance, 0);
        err_code = mipi_dsih_hal_dpi_null_packet_size(instance, 0);
        err_code = err_code? err_code: mipi_dsih_hal_dpi_chunks_no(instance, 1);
        err_code = err_code? err_code: mipi_dsih_hal_dpi_video_packet_size(instance, video_size);
        if (err_code != OK)
        {
            return err_code;
        }
        /* BURST by default, returns to LP during ALL empty periods - energy saving */
        mipi_dsih_hal_dpi_lp_during_hfp(instance, 1);
#if defined(CONFIG_FB_LCD_SSD2075_MIPI)
	mipi_dsih_hal_dpi_lp_during_hbp(instance, 0);
#else
        mipi_dsih_hal_dpi_lp_during_hbp(instance, 1);
#endif
        mipi_dsih_hal_dpi_lp_during_vactive(instance, 1);
        mipi_dsih_hal_dpi_lp_during_vfp(instance, 1);
        mipi_dsih_hal_dpi_lp_during_vbp(instance, 1);
        mipi_dsih_hal_dpi_lp_during_vsync(instance, 1);
#if DEBUG
        /*      D E B U G       */
        if (instance->log_info != 0)
        {
            instance->log_info("sprdfb: burst video");
            instance->log_info("sprdfb: h line time %ld", (uint16_t)((video_params->h_total_pixels * ratio_clock_xPF) / PRECISION_FACTOR));
            instance->log_info("sprdfb: video_size %ld", video_size);
        }
#endif
    }
    else
    {   /* non burst transmission */
        null_packet_size = 0;
        /* bytes to be sent - first as one chunk*/
        bytes_per_chunk = (bytes_per_pixel_x100 * video_params->h_active_pixels) / 100 + VIDEO_PACKET_OVERHEAD;
        /* bytes being received through the DPI interface per byte clock cycle */
        total_bytes = (ratio_clock_xPF * video_params->no_of_lanes * (video_params->h_total_pixels - video_params->h_back_porch_pixels - video_params->h_sync_pixels)) / PRECISION_FACTOR;
        /* check if the in pixels actually fit on the DSI link */
        if (total_bytes >= bytes_per_chunk)
        {
            chunk_overhead = total_bytes - bytes_per_chunk;
            /* overhead higher than 1 -> enable multi packets */
            if (chunk_overhead > 1)
            {   /* MULTI packets */
                for (video_size = video_size_step; video_size < video_params->h_active_pixels; video_size += video_size_step)
                {   /* determine no of chunks */
                    if ((((video_params->h_active_pixels * PRECISION_FACTOR) / video_size) % PRECISION_FACTOR) == 0)
                    {
                        no_of_chunks = video_params->h_active_pixels / video_size;
                        bytes_per_chunk = (bytes_per_pixel_x100 * video_size) / 100 + VIDEO_PACKET_OVERHEAD;
                        if (total_bytes >= (bytes_per_chunk * no_of_chunks))
                        {
                            bytes_left = total_bytes - (bytes_per_chunk * no_of_chunks);
                            break;
                        }
                    }
                }
                /* prevent overflow (unsigned - unsigned) */
                if (bytes_left > (NULL_PACKET_OVERHEAD * no_of_chunks))
                {
                    null_packet_size = (bytes_left - (NULL_PACKET_OVERHEAD * no_of_chunks)) / no_of_chunks;
                    if (null_packet_size > MAX_NULL_SIZE)
                    {   /* avoid register overflow */
                        null_packet_size = MAX_NULL_SIZE;
                    }
                }
            }
            else
            {   /* no multi packets */
                no_of_chunks = 1;
#if DEBUG
                /*      D E B U G       */
                if (instance->log_info != 0)
                {
                    instance->log_info("sprdfb: no multi no null video");
                    instance->log_info("sprdfb: h line time %ld", (uint16_t)((video_params->h_total_pixels * ratio_clock_xPF) / PRECISION_FACTOR));
                    instance->log_info("sprdfb: video_size %ld", video_size);
                }
                /************************/
#endif
                /* video size must be a multiple of 4 when not 18 loosely */
                for (video_size = video_params->h_active_pixels; (video_size % video_size_step) != 0; video_size++)
                {
                    ;
                }
            }
        }
        else
        {
            instance->log_error("sprdfb: resolution cannot be sent to display through current settings");
            err_code = ERR_DSI_OVERFLOW;
        }
    }
    err_code = err_code? err_code: mipi_dsih_hal_dpi_chunks_no(instance, no_of_chunks);
    err_code = err_code? err_code: mipi_dsih_hal_dpi_video_packet_size(instance, video_size);
    err_code = err_code? err_code: mipi_dsih_hal_dpi_null_packet_size(instance, null_packet_size);
    mipi_dsih_hal_dpi_null_packet_en(instance, null_packet_size > 0? 1: 0);
    mipi_dsih_hal_dpi_multi_packet_en(instance, (no_of_chunks > 1)? 1: 0);
#if DEBUG
    /*      D E B U G       */
    if (instance->log_info != 0)
    {
        instance->log_info("sprdfb: total_bytes %d", total_bytes);
        instance->log_info("sprdfb: bytes_per_chunk %d", bytes_per_chunk);
        instance->log_info("sprdfb: bytes left %d", bytes_left);
        instance->log_info("sprdfb: null packets %d", null_packet_size);
        instance->log_info("sprdfb: chunks %ld", no_of_chunks);
        instance->log_info("sprdfb: video_size %ld", video_size);
    }
    /************************/
#endif
    mipi_dsih_hal_dpi_video_vc(instance, video_params->virtual_channel);
    mipi_dsih_dphy_no_of_lanes(&(instance->phy_instance), video_params->no_of_lanes);
    /* enable high speed clock */
//    mipi_dsih_dphy_enable_hs_clk(&(instance->phy_instance), 1);
    return err_code;
}
dsih_error_t mipi_dsih_dcs_wr_cmd(dsih_ctrl_t * instance, uint8_t vc, uint8_t* params, uint16_t param_length)
{
    uint8_t packet_type = 0;
//    int i = 0;
    if (params == 0)
    {
        return ERR_DSI_OUT_OF_BOUND;
    }
#if 0
    if (param_length > 2)
    {
        i = 2;
    }
    switch (params[i])
    {
        case 0x39:
        case 0x38:
        case 0x34:
        case 0x29:
        case 0x28:
        case 0x21:
        case 0x20:
        case 0x13:
        case 0x12:
        case 0x11:
        case 0x10:
        case 0x01:
        case 0x00:
            packet_type = 0x05; /* DCS short write no param */
            break;
        case 0x3A:
        case 0x36:
        case 0x35:
        case 0x26:
            packet_type = 0x15; /* DCS short write 1 param */
            break;
        case 0x44:
        case 0x3C:
        case 0x37:
        case 0x33:
        case 0x30:
        case 0x2D:
        case 0x2C:
        case 0x2B:
        case 0x2A:
            packet_type = 0x39; /* DCS long write/write_LUT command packet */
            break;
        default:
            if (instance->log_error != 0)
            {
                instance->log_error("invalid DCS command");
            }
            return ERR_DSI_INVALID_COMMAND;
    }
#endif
	switch(param_length)
	{
		case 1:
			packet_type = 0x05; /* DCS short write no param */
			break;
		case 2:
			packet_type = 0x15; /* DCS short write 1 param */
			break;
		default:
			packet_type = 0x39; /* DCS long write/write_LUT command packet */
			break;
	}

    return mipi_dsih_gen_wr_packet(instance, vc, packet_type, params, param_length);
}
void mipi_dsih_cmd_mode(dsih_ctrl_t * instance, int en)
{
    if(0 == instance)
    {
        return;
    }

    if (instance->status == INITIALIZED)
    {
        if ((!mipi_dsih_hal_gen_is_cmd_mode(instance)) && en)
        {   /* disable video mode first */
            mipi_dsih_hal_dpi_video_mode_en(instance, 0);
            mipi_dsih_hal_gen_cmd_mode_en(instance, 1);
        }
        else if ((mipi_dsih_hal_gen_is_cmd_mode(instance)) && !en)
        {
            mipi_dsih_hal_gen_cmd_mode_en(instance, 0);
        }
        return;
    }
        
    if (instance->log_error != 0)
    {
        instance->log_error("sprdfb: invalid instance");
    }
}

void mipi_dsih_video_mode(dsih_ctrl_t * instance, int en)
{
    if(0 == instance)
    {
        return;
    }

    if (instance->status == INITIALIZED)
    {
        if ((!mipi_dsih_hal_dpi_is_video_mode(instance)) && en)
        {   /* disable cmd mode first */
            mipi_dsih_hal_gen_cmd_mode_en(instance, 0);
            mipi_dsih_hal_dpi_video_mode_en(instance, 1);
        }
        else if ((!mipi_dsih_hal_dpi_is_video_mode(instance)) && !en)
        {
            mipi_dsih_hal_dpi_video_mode_en(instance, 0);
        }
        return;
    }

    if (instance->log_error != 0)
    {
        instance->log_error("sprdfb: invalid instance");
    }
}

int mipi_dsih_active_mode(dsih_ctrl_t * instance)
{
	int ret_val=0;
    if (mipi_dsih_hal_gen_is_cmd_mode(instance))
    {
		ret_val=ret_val|0x1;
    }
    if (mipi_dsih_hal_dpi_is_video_mode(instance))
    {
		ret_val=ret_val|0x2;
    }
    return ret_val;
}

dsih_error_t mipi_dsih_gen_wr_cmd(dsih_ctrl_t * instance, uint8_t vc, uint8_t* params, uint16_t param_length)
{
    uint8_t data_type = 0;
    switch(param_length)
    {
        case 0:
            data_type = 0x03;
            break;
        case 1:
            data_type = 0x13;
            break;
        case 2:
            data_type = 0x23;
            break;
        default:
            data_type = 0x29;
            break;
    }
    return mipi_dsih_gen_wr_packet(instance, vc, data_type, params, param_length);
}
dsih_error_t mipi_dsih_gen_wr_packet(dsih_ctrl_t * instance, uint8_t vc, uint8_t data_type, uint8_t* params, uint16_t param_length)
{
    dsih_error_t err_code = OK;
    /* active delay iterator */
    int timeout = 0;
    /* iterators */
    int i = 0;
    int j = 0;
    /* holds padding bytes needed */
    int compliment_counter = 0;
    uint8_t* payload = 0;
    /* temporary variable to arrange bytes into words */
    uint32_t temp = 0;
    uint16_t word_count = 0;
    if (instance == 0)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (instance->status != INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if ((params == 0) && (param_length != 0)) /* pointer NULL */
    {
        return ERR_DSI_OUT_OF_BOUND;
    }
    if (param_length > 2)
    {   /* long packet - write word count to header, and the rest to payload */
        payload = params + (2 * sizeof(params[0]));
        word_count = (params[1] << 8) | params[0];
        if ((param_length - 2) < word_count)
        {
            if (instance->log_error != 0)
            {
                instance->log_error("sprdfb: sent > input payload. complemented with zeroes");
            }
            compliment_counter = (param_length - 2) - word_count;
        }
        else if ((param_length - 2) > word_count)
        {
            if (instance->log_error != 0)
            {
                instance->log_error("sprdfb: Overflow - input > sent. payload truncated");
            }
        }
        for (i = 0; i < (param_length - 2); i += j)
        {
            temp = 0;
            for (j = 0; (j < 4) && ((j + i) < (param_length - 2)); j++)
            {   /* temp = (payload[i + 3] << 24) | (payload[i + 2] << 16) | (payload[i + 1] << 8) | payload[i]; */
                temp |= payload[i + j] << (j * 8);
            }
            /* check if payload Tx fifo is not full */
            for (timeout = 0; timeout < DSIH_FIFO_ACTIVE_WAIT; timeout++)
            {
                if (!mipi_dsih_hal_gen_packet_payload(instance, temp))
                {
                    break;
                }
            }
            if (!(timeout < DSIH_FIFO_ACTIVE_WAIT))
            {
                return ERR_DSI_TIMEOUT;
            }
        }
        /* if word count entered by the user more than actual parameters received
         * fill with zeroes - a fail safe mechanism, otherwise controller will
         * want to send data from an empty buffer */
        for (i = 0; i < compliment_counter; i++)
        {
            /* check if payload Tx fifo is not full */
            for (timeout = 0; timeout < DSIH_FIFO_ACTIVE_WAIT; timeout++)
            {
                if (!mipi_dsih_hal_gen_packet_payload(instance, 0x00))
                {
                    break;
                }
            }
            if (!(timeout < DSIH_FIFO_ACTIVE_WAIT))
            {
                return ERR_DSI_TIMEOUT;
            }
        }
    }
    for (timeout = 0; timeout < DSIH_FIFO_ACTIVE_WAIT; timeout++)
    {
        /* check if payload Tx fifo is not full */
        if (!mipi_dsih_hal_gen_cmd_fifo_full(instance))
        {
            if (param_length == 0)
            {
                err_code |= mipi_dsih_hal_gen_packet_header(instance, vc, data_type, 0x0, 0x0);
            }
            else if (param_length == 1)
            {
                err_code |= mipi_dsih_hal_gen_packet_header(instance, vc, data_type, 0x0, params[0]);
            }
            else
            {
                err_code |= mipi_dsih_hal_gen_packet_header(instance, vc, data_type, params[1], params[0]);
            }
            break;
        }
    }
    if (!(timeout < DSIH_FIFO_ACTIVE_WAIT))
    {
        err_code = ERR_DSI_TIMEOUT;
    }
    return err_code;
}
uint16_t mipi_dsih_dcs_rd_cmd(dsih_ctrl_t * instance, uint8_t vc, uint8_t command, uint8_t bytes_to_read, uint8_t* read_buffer)
{
    if (instance == 0)
    {
        return 0;
    }
    if (instance->status != INITIALIZED)
    {
        return 0;
    }
    switch (command)
    {
        case 0xA8:
        case 0xA1:
        case 0x45:
        case 0x3E:
        case 0x2E:
        case 0x0F:
        case 0x0E:
        case 0x0D:
        case 0x0C:
        case 0x0B:
        case 0x0A:
        case 0x08:
        case 0x07:
        case 0x06:
            /* COMMAND_TYPE 0x06 - DCS Read no params refer to DSI spec p.47 */
            return mipi_dsih_gen_rd_packet(instance, vc, 0x06, 0x0, command, bytes_to_read, read_buffer);
        default:
            if (instance->log_error != 0)
            {
                instance->log_error("sprdfb: invalid DCS command");
            }
            return 0;
    }
    return 0;
}
uint16_t mipi_dsih_gen_rd_cmd(dsih_ctrl_t * instance, uint8_t vc, uint8_t* params, uint16_t param_length, uint8_t bytes_to_read, uint8_t* read_buffer)
{
    uint8_t data_type = 0;
    if (instance == 0)
    {
        return 0;
    }
    if (instance->status != INITIALIZED)
    {
        return 0;
    }
    switch(param_length)
    {
        case 0:
            data_type = 0x04;
            return mipi_dsih_gen_rd_packet(instance, vc, data_type, 0x00, 0x00, bytes_to_read, read_buffer);
        case 1:
            data_type = 0x14;
            return mipi_dsih_gen_rd_packet(instance, vc, data_type, 0x00, params[0], bytes_to_read, read_buffer);
        case 2:
            data_type = 0x24;
            return mipi_dsih_gen_rd_packet(instance, vc, data_type, params[1], params[0], bytes_to_read, read_buffer);
        default:
            return 0;
    }
}
uint16_t mipi_dsih_gen_rd_packet(dsih_ctrl_t * instance, uint8_t vc, uint8_t data_type, uint8_t msb_byte, uint8_t lsb_byte, uint8_t bytes_to_read, uint8_t* read_buffer)
{
    dsih_error_t err_code = OK;
    int timeout = 0;
    int counter = 0;
    int i = 0;
    int last_count = 0;
    uint32_t temp[1] = {0};
    if (instance == 0)
    {
        return 0;
    }
    if (instance->status != INITIALIZED)
    {
        return 0;
    }
    if (bytes_to_read < 1)
    {
        return 0;
    }
    if (read_buffer == 0)
    {
        return 0;
    }
#ifndef FB_CHECK_ESD_IN_VFP
    /* make sure command mode is on */
    mipi_dsih_cmd_mode(instance, 1);
#endif
    /* make sure receiving is enabled */
    mipi_dsih_hal_bta_en(instance, 1);
    /* listen to the same virtual channel as the one sent to */
    mipi_dsih_hal_gen_rd_vc(instance, vc);
    for (timeout = 0; timeout < DSIH_FIFO_ACTIVE_WAIT; timeout++)
    {   /* check if payload Tx fifo is not full */
        if (!mipi_dsih_hal_gen_cmd_fifo_full(instance))
        {
            mipi_dsih_hal_gen_packet_header(instance, vc, data_type, msb_byte, lsb_byte);
            break;
        }
    }
    if (!(timeout < DSIH_FIFO_ACTIVE_WAIT))
    {
        if (instance->log_error != 0)
        {
            instance->log_error("sprdfb: tx rd command timed out\n");
        }
        return 0;
    }
    /* loop for the number of words to be read */
    for (timeout = 0; timeout < DSIH_FIFO_ACTIVE_WAIT; timeout++)
    {   /* check if command transaction is done */
        if (!mipi_dsih_hal_gen_rd_cmd_busy(instance))
        {
            if (!mipi_dsih_hal_gen_read_fifo_empty(instance))
            {
                for (counter = 0; (!mipi_dsih_hal_gen_read_fifo_empty(instance)); counter += 4)
                {
                        err_code = mipi_dsih_hal_gen_read_payload(instance, temp);
                        if (err_code)
                        {
                            return 0;
                        }
                    if (counter < bytes_to_read)
                    {
                        for (i = 0; i < 4; i++)
                        {
                            if ((counter + i) < bytes_to_read)
                            {
                                /* put 32 bit temp in 4 bytes of buffer passed by user*/
                                read_buffer[counter + i] = (uint8_t)(temp[0] >> (i * 8));
                                last_count = i + counter;
                            }
                            else
                            {
                                if ((uint8_t)(temp[0] >> (i * 8)) != 0x00)
                                {
                                    last_count = i + counter;
                                }
                            }
                        }
                    }
                    else
                    {
                        last_count = counter;
                        for (i = 0; i < 4; i++)
                        {
                            if ((uint8_t)(temp[0] >> (i * 8)) != 0x00)
                            {
                                last_count = i + counter;
                            }
                        }
                    }
                }
                return last_count + 1;
            }
#ifdef FB_CHECK_ESD_IN_VFP
            else if(timeout == (DSIH_FIFO_ACTIVE_WAIT - 1))//else
#else
            else
#endif
            {
                if (instance->log_error != 0)
                {
                    instance->log_error("sprdfb: rx buffer empty\n");
                }
                return 0;
            }
        }
//#ifdef FB_CHECK_ESD_IN_VFP
        udelay(5);
//#endif
    }
    if (instance->log_error != 0)
    {
        instance->log_error("sprdfb: rx command timed out\n");
    }
    return 0;
}
uint32_t mipi_dsih_dump_register_configuration(dsih_ctrl_t * instance, int all, register_config_t *config, uint16_t config_length)
{
    uint32_t current0 = 0;
    uint16_t count = 0;
    if (instance == 0)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (instance->status != INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (all)
    {   /* dump all registers */
        for (current0 = R_DSI_HOST_VERSION; current0 <= R_DSI_HOST_ERROR_MSK1; count++, current0 += (R_DSI_HOST_PWR_UP - R_DSI_HOST_VERSION))
        {
            if ((config_length == 0) || (config == 0) || count >= config_length)
            {   /* no place to write - write to STD IO */
                if (instance->log_info != 0)
                {
                    instance->log_info("sprdfb: DSI 0x%lX:0x%lX", current0, mipi_dsih_read_word(instance, current0));
                }
            }
            else
            {
                config[count].addr = current0;
                config[count].data = mipi_dsih_read_word(instance, current0);
            }
        }
    }
    else
    {
        if(config == 0)
        {
            if (instance->log_error != 0)
            {
                instance->log_error("sprdfb: invalid buffer");
            }
        }
        else
        {
            for (count = 0; count < config_length; count++)
            {
                config[count].data = mipi_dsih_read_word(instance, config[count].addr);
            }
        }
    }
    return count;
}
uint32_t mipi_dsih_write_register_configuration(dsih_ctrl_t * instance, register_config_t *config, uint16_t config_length)
{
    uint16_t count = 0;
    if (instance == 0)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (instance->status != INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    for (count = 0; count < config_length; count++)
    {
        mipi_dsih_write_word(instance, config[count].addr, config[count].data);
    }
    return count;
}
dsih_error_t mipi_dsih_register_event(dsih_ctrl_t * instance, dsih_event_t event, void (*handler)(dsih_ctrl_t *, void *))
{
    uint32_t mask = 1;
    uint32_t temp = 0;
    if (event >= DSI_MAX_EVENT)
    {
        return ERR_DSI_INVALID_EVENT;
    }
    if (handler == 0)
    {
        return ERR_DSI_INVALID_HANDLE;
    }
    if (instance == 0)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (instance->status != INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    instance->event_registry[event] = handler;
    if (event < HS_CONTENTION)
    {
        temp = mipi_dsih_hal_get_error_mask_0(instance, 0xffffffff);
        temp &= ~(mask << event);
        temp |= (0 & mask) << event;
        mipi_dsih_hal_error_mask_0(instance, temp);
    }
    else
    {
        temp = mipi_dsih_hal_get_error_mask_1(instance, 0xffffffff);
        temp &= ~(mask << (event - HS_CONTENTION));
        temp |= (0 & mask) << (event - HS_CONTENTION);
        mipi_dsih_hal_error_mask_1(instance, temp);
        if (event == RX_CRC_ERR)
        {   /* automatically enable CRC reporting */
            mipi_dsih_hal_gen_crc_rx_en(instance, 1);
        }
    }
    return OK;
}
dsih_error_t mipi_dsih_unregister_event(dsih_ctrl_t * instance, dsih_event_t event)
{
    uint32_t mask = 1;
    uint32_t temp = 0;
    if (event >= DSI_MAX_EVENT)
    {
        return ERR_DSI_INVALID_EVENT;
    }
    if (instance == 0)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (instance->status != INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    instance->event_registry[event] = 0;
    if (event < HS_CONTENTION)
    {
        temp = mipi_dsih_hal_get_error_mask_0(instance, 0xffffffff);
        temp &= ~(mask << event);
        temp |= (1 & mask) << event;
        mipi_dsih_hal_error_mask_0(instance, temp);
    }
    else
    {
        temp = mipi_dsih_hal_get_error_mask_1(instance, 0xffffffff);
        temp &= ~(mask << (event - HS_CONTENTION));
        temp |= (1 & mask) << (event - HS_CONTENTION);
        mipi_dsih_hal_error_mask_1(instance, temp);
        if (event == RX_CRC_ERR)
        {   /* automatically disable CRC reporting */
            mipi_dsih_hal_gen_crc_rx_en(instance, 0);
        }
    }
    return OK;
}
dsih_error_t mipi_dsih_unregister_all_events(dsih_ctrl_t * instance)
{
    int i = 0;
    if (instance == 0)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    if (instance->status != INITIALIZED)
    {
        return ERR_DSI_INVALID_INSTANCE;
    }
    for (i = 0; i < DSI_MAX_EVENT; i++)
    {
        instance->event_registry[i] = 0;
    }
    mipi_dsih_hal_error_mask_0(instance, 0xffffff);
    mipi_dsih_hal_error_mask_1(instance, 0xffffff);
    /* automatically disable CRC reporting */
    mipi_dsih_hal_gen_crc_rx_en(instance, 0);
    return OK;
}
void mipi_dsih_event_handler(void * param)
{
    dsih_ctrl_t * instance = (dsih_ctrl_t *)(param);
    uint8_t i = 0;
    uint32_t status_0;
    uint32_t status_1;
    
    if (instance == 0)
    {
        return;
    }

    status_0 = mipi_dsih_hal_error_status_0(instance, 0xffffffff);
    status_1 = mipi_dsih_hal_error_status_1(instance, 0xffffffff);

    for (i = 0; i < DSI_MAX_EVENT; i++)
    {
        if (instance->event_registry[i] != 0)
        {
            if (i < HS_CONTENTION)
            {
                if ((status_0 & (1 << i)) != 0)
                {
                    instance->event_registry[i](instance, &i);
                }
            }
            else
            {
                if ((status_1 & (1 << (i - HS_CONTENTION))) != 0)
                {
                    instance->event_registry[i](instance, &i);
                }
            }
        }
    }
}
void mipi_dsih_reset_controller(dsih_ctrl_t * instance)
{
    mipi_dsih_hal_power(instance, 0);
    mipi_dsih_hal_power(instance, 1);
}
void mipi_dsih_shutdown_controller(dsih_ctrl_t * instance, int shutdown)
{
    mipi_dsih_hal_power(instance, !shutdown);
}
void mipi_dsih_reset_phy(dsih_ctrl_t * instance)
{
    mipi_dsih_dphy_reset(&(instance->phy_instance), 0);
    mipi_dsih_dphy_reset(&(instance->phy_instance), 1);
}
void mipi_dsih_shutdown_phy(dsih_ctrl_t * instance, int shutdown)
{
    mipi_dsih_dphy_shutdown(&(instance->phy_instance), !shutdown);
}

void mipi_dsih_ulps_mode(dsih_ctrl_t * instance, int en)
{
	mipi_dsih_dphy_ulps_data_lanes(&(instance->phy_instance),en);
	mipi_dsih_dphy_ulps_clk_lane(&(instance->phy_instance),en);
}