board/freescale/ls1021aqds/dcu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2014 Freescale Semiconductor, Inc.
   4  * Copyright 2019 NXP
   5  *
   6  * FSL DCU Framebuffer driver
   7  */
   8
   9 #include <asm/global_data.h>
  10 #include <asm/io.h>
  11 #include <common.h>
  12 #include <fsl_dcu_fb.h>
  13 #include <i2c.h>
  14 #include "../common/i2c_mux.h"
  15 #include "div64.h"
  16 #include "../common/diu_ch7301.h"
  17 #include "ls1021aqds_qixis.h"
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 unsigned int dcu_set_pixel_clock(unsigned int pixclock)
  22 {
  23         unsigned long long div;
  24
  25         div = (unsigned long long)(gd->bus_clk / 1000);
  26         div *= (unsigned long long)pixclock;
  27         do_div(div, 1000000000);
  28
  29         return div;
  30 }
  31
  32 int platform_dcu_init(struct fb_info *fbinfo,
  33                       unsigned int xres,
  34                       unsigned int yres,
  35                       const char *port,
  36                       struct fb_videomode *dcu_fb_videomode)
  37 {
  38         const char *name;
  39         unsigned int pixel_format;
  40         int ret;
  41         u8 ch;
  42
  43         /* Mux I2C3+I2C4 as HSYNC+VSYNC */
  44 #if CONFIG_IS_ENABLED(DM_I2C)
  45         struct udevice *dev;
  46
  47         /* QIXIS device mount on I2C1 bus*/
  48         ret = i2c_get_chip_for_busnum(0, CONFIG_SYS_I2C_QIXIS_ADDR,
  49                                       1, &dev);
  50         if (ret) {
  51                 printf("%s: Cannot find udev for a bus %d\n", __func__,
  52                        0);
  53                 return ret;
  54         }
  55         ret = dm_i2c_read(dev, QIXIS_DCU_BRDCFG5, &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 = dm_i2c_write(dev, QIXIS_DCU_BRDCFG5, &ch, 1);
  64
  65 #else
  66         ret = i2c_read(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
  67                        1, &ch, 1);
  68         if (ret) {
  69                 printf("Error: failed to read I2C @%02x\n",
  70                        CONFIG_SYS_I2C_QIXIS_ADDR);
  71                 return ret;
  72         }
  73         ch &= 0x1F;
  74         ch |= 0xA0;
  75         ret = i2c_write(CONFIG_SYS_I2C_QIXIS_ADDR, QIXIS_DCU_BRDCFG5,
  76                         1, &ch, 1);
  77 #endif
  78         if (ret) {
  79                 printf("Error: failed to write I2C @%02x\n",
  80                        CONFIG_SYS_I2C_QIXIS_ADDR);
  81                 return ret;
  82         }
  83
  84         if (strncmp(port, "hdmi", 4) == 0) {
  85                 unsigned long pixval;
  86
  87                 name = "HDMI";
  88
  89                 pixval = 1000000000 / dcu_fb_videomode->pixclock;
  90                 pixval *= 1000;
  91
  92 #if !CONFIG_IS_ENABLED(DM_I2C)
  93                 i2c_set_bus_num(CONFIG_SYS_I2C_DVI_BUS_NUM);
  94 #endif
  95                 select_i2c_ch_pca9547(I2C_MUX_CH_CH7301,
  96                                       CONFIG_SYS_I2C_DVI_BUS_NUM);
  97                 diu_set_dvi_encoder(pixval);
  98                 select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT,
  99                                       CONFIG_SYS_I2C_DVI_BUS_NUM);
 100         } else {
 101                 return 0;
 102         }
 103
 104         printf("DCU: Switching to %s monitor @ %ux%u\n", name, xres, yres);
 105
 106         pixel_format = 32;
 107         fsl_dcu_init(fbinfo, xres, yres, pixel_format);
 108
 109         return 0;
 110 }