drivers/video/sandbox_sdl.c

   1 /*
   2  * Copyright (c) 2013 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <fdtdec.h>
   9 #include <lcd.h>
  10 #include <malloc.h>
  11 #include <asm/sdl.h>
  12 #include <asm/u-boot-sandbox.h>
  13
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 enum {
  17         /* Maximum LCD size we support */
  18         LCD_MAX_WIDTH           = 1366,
  19         LCD_MAX_HEIGHT          = 768,
  20         LCD_MAX_LOG2_BPP        = 4,            /* 2^4 = 16 bpp */
  21 };
  22
  23 vidinfo_t panel_info;
  24
  25 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
  26 {
  27 }
  28
  29 void lcd_ctrl_init(void *lcdbase)
  30 {
  31         /*
  32          * Allocate memory to keep BMP color conversion map. This is required
  33          * for 8 bit BMPs only (hence 256 colors). If malloc fails - keep
  34          * going, it is not even clear if displyaing the bitmap will be
  35          * required on the way up.
  36          */
  37         panel_info.cmap = malloc(256 * NBITS(panel_info.vl_bpix) / 8);
  38 }
  39
  40 void lcd_enable(void)
  41 {
  42         if (sandbox_sdl_init_display(panel_info.vl_col, panel_info.vl_row,
  43                                      panel_info.vl_bpix))
  44                 puts("LCD init failed\n");
  45 }
  46
  47 int sandbox_lcd_sdl_early_init(void)
  48 {
  49         const void *blob = gd->fdt_blob;
  50         int xres = LCD_MAX_WIDTH, yres = LCD_MAX_HEIGHT;
  51         int node;
  52         int ret = 0;
  53
  54         /*
  55          * The code in common/lcd.c does not cope with not being able to
  56          * set up a frame buffer. It will just happily keep writing to
  57          * invalid memory. So here we make sure that at least some buffer
  58          * is available even if it actually won't be displayed.
  59          */
  60         node = fdtdec_next_compatible(blob, 0, COMPAT_SANDBOX_LCD_SDL);
  61         if (node >= 0) {
  62                 xres = fdtdec_get_int(blob, node, "xres", LCD_MAX_WIDTH);
  63                 yres = fdtdec_get_int(blob, node, "yres", LCD_MAX_HEIGHT);
  64                 if (xres < 0 || xres > LCD_MAX_WIDTH) {
  65                         xres = LCD_MAX_WIDTH;
  66                         ret = -EINVAL;
  67                 }
  68                 if (yres < 0 || yres > LCD_MAX_HEIGHT) {
  69                         yres = LCD_MAX_HEIGHT;
  70                         ret = -EINVAL;
  71                 }
  72         }
  73
  74         panel_info.vl_col = xres;
  75         panel_info.vl_row = yres;
  76         panel_info.vl_bpix = LCD_COLOR16;
  77
  78         return ret;
  79 }