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/*
* Copyright 2014 Freescale Semiconductor, Inc.
*
* FSL DCU Framebuffer driver
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/io.h>
#include <common.h>
#include <fsl_dcu_fb.h>
#include <i2c.h>
#include "div64.h"
#include "../common/diu_ch7301.h"
#include "ls1021aqds_qixis.h"
DECLARE_GLOBAL_DATA_PTR;
static int select_i2c_ch_pca9547(u8 ch)
{
int ret;
ret = i2c_write(I2C_MUX_PCA_ADDR_PRI, 0, 1, &ch, 1);
if (ret) {
puts("PCA: failed to select proper channel\n");
return ret;
}
return 0;
}
unsigned int dcu_set_pixel_clock(unsigned int pixclock)
{
unsigned long long div;
div = (unsigned long long)(gd->bus_clk / 1000);
div *= (unsigned long long)pixclock;
do_div(div, 1000000000);
return div;
}
int platform_dcu_init(unsigned int xres, unsigned int yres,
const char *port,
struct fb_videomode *dcu_fb_videomode)
{
const char *name;
unsigned int pixel_format;
int ret;
u8 ch;
/* Mux I2C3+I2C4 as HSYNC+VSYNC */
ret = i2c_read(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
1, &ch, 1);
if (ret) {
printf("Error: failed to read I2C @%02x\n",
CONFIG_SYS_I2C_QIXIS_ADDR);
return ret;
}
ch &= 0x1F;
ch |= 0xA0;
ret = i2c_write(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
1, &ch, 1);
if (ret) {
printf("Error: failed to write I2C @%02x\n",
CONFIG_SYS_I2C_QIXIS_ADDR);
return ret;
}
if (strncmp(port, "hdmi", 4) == 0) {
unsigned long pixval;
name = "HDMI";
pixval = 1000000000 / dcu_fb_videomode->pixclock;
pixval *= 1000;
i2c_set_bus_num(CONFIG_SYS_I2C_DVI_BUS_NUM);
select_i2c_ch_pca9547(I2C_MUX_CH_CH7301);
diu_set_dvi_encoder(pixval);
select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
} else {
return 0;
}
printf("DCU: Switching to %s monitor @ %ux%u\n", name, xres, yres);
pixel_format = 32;
fsl_dcu_init(xres, yres, pixel_format);
return 0;
}
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