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