arch/arm/mach-imx/video.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2
   3 #include <common.h>
   4 #include <env.h>
   5 #include <linux/errno.h>
   6 #include <asm/mach-imx/video.h>
   7
   8 #ifdef CONFIG_IMX_HDMI
   9 #include <asm/arch/mxc_hdmi.h>
  10 #include <asm/io.h>
  11
  12 int detect_hdmi(struct display_info_t const *dev)
  13 {
  14         struct hdmi_regs *hdmi  = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
  15         return readb(&hdmi->phy_stat0) & HDMI_DVI_STAT;
  16 }
  17 #endif
  18
  19 int board_video_skip(void)
  20 {
  21         int i;
  22         int ret = 0;
  23         char const *panel = env_get("panel");
  24
  25         if (!panel) {
  26                 for (i = 0; i < display_count; i++) {
  27                         struct display_info_t const *dev = displays+i;
  28                         if (dev->detect && dev->detect(dev)) {
  29                                 panel = dev->mode.name;
  30                                 printf("auto-detected panel %s\n", panel);
  31                                 break;
  32                         }
  33                 }
  34                 if (!panel) {
  35                         panel = displays[0].mode.name;
  36                         printf("No panel detected: default to %s\n", panel);
  37                         i = 0;
  38                 }
  39         } else {
  40                 for (i = 0; i < display_count; i++) {
  41                         if (!strcmp(panel, displays[i].mode.name))
  42                                 break;
  43                 }
  44         }
  45
  46         if (i < display_count) {
  47                 ret = ipuv3_fb_init(&displays[i].mode, displays[i].di ? 1 : 0,
  48                                     displays[i].pixfmt);
  49                 if (!ret) {
  50                         if (displays[i].enable)
  51                                 displays[i].enable(displays + i);
  52
  53                         printf("Display: %s (%ux%u)\n",
  54                                displays[i].mode.name,
  55                                displays[i].mode.xres,
  56                                displays[i].mode.yres);
  57
  58 #ifdef CONFIG_IMX_HDMI
  59                         if (!strcmp(displays[i].mode.name, "HDMI"))
  60                                 imx_enable_hdmi_phy();
  61 #endif
  62                 } else
  63                         printf("LCD %s cannot be configured: %d\n",
  64                                displays[i].mode.name, ret);
  65         } else {
  66                 printf("unsupported panel %s\n", panel);
  67                 return -EINVAL;
  68         }
  69
  70         return ret;
  71 }
  72
  73 int ipu_displays_init(void)
  74 {
  75         return board_video_skip();
  76 }