arch/arm/mach-imx/video.c

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