board/freescale/ls1021atwr/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 <common.h>
   9 #include <fsl_dcu_fb.h>
  10 #include <asm/global_data.h>
  11 #include "div64.h"
  12 #include "../common/dcu_sii9022a.h"
  13
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 unsigned int dcu_set_pixel_clock(unsigned int pixclock)
  17 {
  18         unsigned long long div;
  19
  20         div = (unsigned long long)(gd->bus_clk / 1000);
  21         div *= (unsigned long long)pixclock;
  22         do_div(div, 1000000000);
  23
  24         return div;
  25 }
  26
  27 int platform_dcu_init(struct fb_info *fbinfo,
  28                       unsigned int xres, unsigned int yres,
  29                       const char *port,
  30                       struct fb_videomode *dcu_fb_videomode)
  31 {
  32         const char *name;
  33         unsigned int pixel_format;
  34
  35         if (strncmp(port, "twr_lcd", 4) == 0) {
  36                 name = "TWR_LCD_RGB card";
  37         } else {
  38                 name = "HDMI";
  39                 dcu_set_dvi_encoder(dcu_fb_videomode);
  40         }
  41
  42         printf("DCU: Switching to %s monitor @ %ux%u\n", name, xres, yres);
  43
  44         pixel_format = 32;
  45         fsl_dcu_init(fbinfo, xres, yres, pixel_format);
  46
  47         return 0;
  48 }