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(unsigned int xres, unsigned int yres,
  43                      const char *port,
  44                      struct fb_videomode *dcu_fb_videomode)
  45{
  46        const char *name;
  47        unsigned int pixel_format;
  48        int ret;
  49        u8 ch;
  50
  51        /* Mux I2C3+I2C4 as HSYNC+VSYNC */
  52        ret = i2c_read(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
  53                       1, &ch, 1);
  54        if (ret) {
  55                printf("Error: failed to read I2C @%02x\n",
  56                       CONFIG_SYS_I2C_QIXIS_ADDR);
  57                return ret;
  58        }
  59        ch &= 0x1F;
  60        ch |= 0xA0;
  61        ret = i2c_write(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
  62                        1, &ch, 1);
  63        if (ret) {
  64                printf("Error: failed to write I2C @%02x\n",
  65                       CONFIG_SYS_I2C_QIXIS_ADDR);
  66                return ret;
  67        }
  68
  69        if (strncmp(port, "hdmi", 4) == 0) {
  70                unsigned long pixval;
  71
  72                name = "HDMI";
  73
  74                pixval = 1000000000 / dcu_fb_videomode->pixclock;
  75                pixval *= 1000;
  76
  77                i2c_set_bus_num(CONFIG_SYS_I2C_DVI_BUS_NUM);
  78                select_i2c_ch_pca9547(I2C_MUX_CH_CH7301);
  79                diu_set_dvi_encoder(pixval);
  80                select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
  81        } else {
  82                return 0;
  83        }
  84
  85        printf("DCU: Switching to %s monitor @ %ux%u\n", name, xres, yres);
  86
  87        pixel_format = 32;
  88        fsl_dcu_init(xres, yres, pixel_format);
  89
  90        return 0;
  91}
  92