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

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright 2014 Freescale Semiconductor, Inc.
   4 *
   5 * FSL DCU Framebuffer driver
   6 */
   7
   8#include <asm/io.h>
   9#include <common.h>
  10#include <fsl_dcu_fb.h>
  11#include <i2c.h>
  12#include "div64.h"
  13#include "../common/diu_ch7301.h"
  14#include "ls1021aqds_qixis.h"
  15
  16DECLARE_GLOBAL_DATA_PTR;
  17
  18static int select_i2c_ch_pca9547(u8 ch)
  19{
  20        int ret;
  21
  22        ret = i2c_write(I2C_MUX_PCA_ADDR_PRI, 0, 1, &ch, 1);
  23        if (ret) {
  24                puts("PCA: failed to select proper channel\n");
  25                return ret;
  26        }
  27
  28        return 0;
  29}
  30
  31unsigned int dcu_set_pixel_clock(unsigned int pixclock)
  32{
  33        unsigned long long div;
  34
  35        div = (unsigned long long)(gd->bus_clk / 1000);
  36        div *= (unsigned long long)pixclock;
  37        do_div(div, 1000000000);
  38
  39        return div;
  40}
  41
  42int platform_dcu_init(struct fb_info *fbinfo,
  43                      unsigned int xres,
  44                      unsigned int yres,
  45                      const char *port,
  46                      struct fb_videomode *dcu_fb_videomode)
  47{
  48        const char *name;
  49        unsigned int pixel_format;
  50        int ret;
  51        u8 ch;
  52
  53        /* Mux I2C3+I2C4 as HSYNC+VSYNC */
  54        ret = i2c_read(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
  55                       1, &ch, 1);
  56        if (ret) {
  57                printf("Error: failed to read I2C @%02x\n",
  58                       CONFIG_SYS_I2C_QIXIS_ADDR);
  59                return ret;
  60        }
  61        ch &= 0x1F;
  62        ch |= 0xA0;
  63        ret = i2c_write(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
  64                        1, &ch, 1);
  65        if (ret) {
  66                printf("Error: failed to write I2C @%02x\n",
  67                       CONFIG_SYS_I2C_QIXIS_ADDR);
  68                return ret;
  69        }
  70
  71        if (strncmp(port, "hdmi", 4) == 0) {
  72                unsigned long pixval;
  73
  74                name = "HDMI";
  75
  76                pixval = 1000000000 / dcu_fb_videomode->pixclock;
  77                pixval *= 1000;
  78
  79                i2c_set_bus_num(CONFIG_SYS_I2C_DVI_BUS_NUM);
  80                select_i2c_ch_pca9547(I2C_MUX_CH_CH7301);
  81                diu_set_dvi_encoder(pixval);
  82                select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
  83        } else {
  84                return 0;
  85        }
  86
  87        printf("DCU: Switching to %s monitor @ %ux%u\n", name, xres, yres);
  88
  89        pixel_format = 32;
  90        fsl_dcu_init(fbinfo, xres, yres, pixel_format);
  91
  92        return 0;
  93}
  94