arch/arm/mach-imx/video.c

   1 /*
   2  * SPDX-License-Identifier:     GPL-2.0+
   3  */
   4
   5 #include <common.h>
   6 #include <linux/errno.h>
   7 #include <asm/mach-imx/video.h>
   8
   9 int board_video_skip(void)
  10 {
  11         int i;
  12         int ret;
  13         char const *panel = env_get("panel");
  14
  15         if (!panel) {
  16                 for (i = 0; i < display_count; i++) {
  17                         struct display_info_t const *dev = displays+i;
  18                         if (dev->detect && dev->detect(dev)) {
  19                                 panel = dev->mode.name;
  20                                 printf("auto-detected panel %s\n", panel);
  21                                 break;
  22                         }
  23                 }
  24                 if (!panel) {
  25                         panel = displays[0].mode.name;
  26                         printf("No panel detected: default to %s\n", panel);
  27                         i = 0;
  28                 }
  29         } else {
  30                 for (i = 0; i < display_count; i++) {
  31                         if (!strcmp(panel, displays[i].mode.name))
  32                                 break;
  33                 }
  34         }
  35
  36         if (i < display_count) {
  37                 ret = ipuv3_fb_init(&displays[i].mode, displays[i].di ? 1 : 0,
  38                                     displays[i].pixfmt);
  39                 if (!ret) {
  40                         if (displays[i].enable)
  41                                 displays[i].enable(displays + i);
  42
  43                         printf("Display: %s (%ux%u)\n",
  44                                displays[i].mode.name,
  45                                displays[i].mode.xres,
  46                                displays[i].mode.yres);
  47                 } else
  48                         printf("LCD %s cannot be configured: %d\n",
  49                                displays[i].mode.name, ret);
  50         } else {
  51                 printf("unsupported panel %s\n", panel);
  52                 return -EINVAL;
  53         }
  54
  55         return 0;
  56 }
  57
  58 #ifdef CONFIG_IMX_HDMI
  59 #include <asm/arch/mxc_hdmi.h>
  60 #include <asm/io.h>
  61 int detect_hdmi(struct display_info_t const *dev)
  62 {
  63         struct hdmi_regs *hdmi  = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
  64         return readb(&hdmi->phy_stat0) & HDMI_DVI_STAT;
  65 }
  66 #endif