LXR uboot/board/freescale/ls1021aqds/dcu.c

   1/*
   2 * Copyright 2014 Freescale Semiconductor, Inc.
   3 *
   4 * FSL DCU Framebuffer driver
   5 *
   6 * SPDX-License-Identifier:     GPL-2.0+
   7 */
   8
   9#include <asm/io.h>
  10#include <common.h>
  11#include <fsl_dcu_fb.h>
  12#include <i2c.h>
  13#include "div64.h"
  14#include "../common/diu_ch7301.h"
  15#include "ls1021aqds_qixis.h"
  16
  17DECLARE_GLOBAL_DATA_PTR;
  18
  19static int select_i2c_ch_pca9547(u8 ch)
  20{
  21        int ret;
  22
  23        ret = i2c_write(I2C_MUX_PCA_ADDR_PRI, 0, 1, &ch, 1);
  24        if (ret) {
  25                puts("PCA: failed to select proper channel\n");
  26                return ret;
  27        }
  28
  29        return 0;
  30}
  31
  32unsigned int dcu_set_pixel_clock(unsigned int pixclock)
  33{
  34        unsigned long long div;
  35
  36        div = (unsigned long long)(gd->bus_clk / 1000);
  37        div *= (unsigned long long)pixclock;
  38        do_div(div, 1000000000);
  39
  40        return div;
  41}
  42
  43int platform_dcu_init(unsigned int xres, unsigned int yres,
  44                      const char *port,
  45                      struct fb_videomode *dcu_fb_videomode)
  46{
  47        const char *name;
  48        unsigned int pixel_format;
  49        int ret;
  50        u8 ch;
  51
  52        /* Mux I2C3+I2C4 as HSYNC+VSYNC */
  53        ret = i2c_read(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
  54                       1, &ch, 1);
  55        if (ret) {
  56                printf("Error: failed to read I2C @%02x\n",
  57                       CONFIG_SYS_I2C_QIXIS_ADDR);
  58                return ret;
  59        }
  60        ch &= 0x1F;
  61        ch |= 0xA0;
  62        ret = i2c_write(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
  63                        1, &ch, 1);
  64        if (ret) {
  65                printf("Error: failed to write I2C @%02x\n",
  66                       CONFIG_SYS_I2C_QIXIS_ADDR);
  67                return ret;
  68        }
  69
  70        if (strncmp(port, "hdmi", 4) == 0) {
  71                unsigned long pixval;
  72
  73                name = "HDMI";
  74
  75                pixval = 1000000000 / dcu_fb_videomode->pixclock;
  76                pixval *= 1000;
  77
  78                i2c_set_bus_num(CONFIG_SYS_I2C_DVI_BUS_NUM);
  79                select_i2c_ch_pca9547(I2C_MUX_CH_CH7301);
  80                diu_set_dvi_encoder(pixval);
  81                select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
  82        } else {
  83                return 0;
  84        }
  85
  86        printf("DCU: Switching to %s monitor @ %ux%u\n", name, xres, yres);
  87
  88        pixel_format = 32;
  89        fsl_dcu_init(xres, yres, pixel_format);
  90
  91        return 0;
  92}
  93