src/soc/mediatek/common/display.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <cbfs.h>
   4 #include <console/console.h>
   5 #include <delay.h>
   6 #include <edid.h>
   7 #include <framebuffer_info.h>
   8 #include <soc/ddp.h>
   9 #include <soc/display.h>
  10 #include <soc/dptx.h>
  11 #include <soc/dsi.h>
  12 #include <soc/mtcmos.h>
  13 #include <stdio.h>
  14
  15 static struct panel_serializable_data *get_mipi_cmd_from_cbfs(struct panel_description *desc)
  16 {
  17         /*
  18          * The CBFS file name is panel-{MANUFACTURER}-${PANEL_NAME}, where MANUFACTURER is 3
  19          * characters and PANEL_NAME is usually 13 characters.
  20          */
  21         char cbfs_name[64];
  22         static union {
  23                 u8 raw[4 * 1024];  /* Most panels only need < 2K. */
  24                 struct panel_serializable_data s;
  25         } buffer;
  26
  27         if (!desc->name) {
  28                 printk(BIOS_ERR, "Missing panel CBFS file name.\n");
  29                 return NULL;
  30         }
  31
  32         snprintf(cbfs_name, sizeof(cbfs_name), "panel-%s", desc->name);
  33         if (cbfs_load(cbfs_name, buffer.raw, sizeof(buffer)))
  34                 return &buffer.s;
  35
  36         printk(BIOS_ERR, "Missing %s in CBFS.\n", cbfs_name);
  37         return NULL;
  38 }
  39
  40 __weak int mtk_edp_init(struct edid *edid)
  41 {
  42         printk(BIOS_WARNING, "%s: Not supported\n", __func__);
  43         return -1;
  44 }
  45
  46 __weak int mtk_dsi_init(u32 mode_flags, u32 format, u32 lanes,
  47                         const struct edid *edid, const u8 *init_commands)
  48 {
  49         printk(BIOS_WARNING, "%s: Not supported\n", __func__);
  50         return -1;
  51 }
  52
  53 int mtk_display_init(void)
  54 {
  55         struct edid edid;
  56         struct fb_info *info;
  57         const char *name;
  58         struct panel_description *panel = get_active_panel();
  59
  60         if (!panel || panel->disp_path == DISP_PATH_NONE) {
  61                 printk(BIOS_ERR, "%s: Failed to get the active panel\n", __func__);
  62                 return -1;
  63         }
  64
  65         printk(BIOS_INFO, "%s: Starting display initialization\n", __func__);
  66
  67         mtcmos_display_power_on();
  68         mtcmos_protect_display_bus();
  69
  70         if (panel->configure_backlight)
  71                 panel->configure_backlight();
  72         if (panel->power_on)
  73                 panel->power_on();
  74
  75         mtk_ddp_init();
  76
  77         if (panel->disp_path == DISP_PATH_EDP) {
  78                 mdelay(200);
  79                 if (mtk_edp_init(&edid) < 0) {
  80                         printk(BIOS_ERR, "%s: Failed to initialize eDP\n", __func__);
  81                         return -1;
  82                 }
  83         } else {
  84                 struct panel_serializable_data *mipi_data = NULL;
  85
  86                 if (panel->get_edid) {
  87                         if (panel->get_edid(&edid) < 0)
  88                                 return -1;
  89                 } else {
  90                         mipi_data = get_mipi_cmd_from_cbfs(panel);
  91                         if (!mipi_data)
  92                                 return -1;
  93                         edid = mipi_data->edid;
  94                 }
  95
  96                 u32 mipi_dsi_flags = (MIPI_DSI_MODE_VIDEO |
  97                                       MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
  98                                       MIPI_DSI_MODE_LPM |
  99                                       MIPI_DSI_MODE_EOT_PACKET);
 100
 101                 if (mtk_dsi_init(mipi_dsi_flags, MIPI_DSI_FMT_RGB888, 4, &edid,
 102                                  mipi_data ? mipi_data->init : NULL) < 0) {
 103                         printk(BIOS_ERR, "%s: Failed in DSI init\n", __func__);
 104                         return -1;
 105                 }
 106
 107                 if (panel->post_power_on && panel->post_power_on(&edid) < 0) {
 108                         printk(BIOS_ERR, "%s: Failed to post power on bridge\n", __func__);
 109                         return -1;
 110                 }
 111         }
 112
 113         name = edid.ascii_string;
 114         if (name[0] == '\0')
 115                 name = "unknown name";
 116         printk(BIOS_INFO, "%s: '%s %s' %dx%d@%dHz\n", __func__,
 117                edid.manufacturer_name, name, edid.mode.ha, edid.mode.va,
 118                edid.mode.refresh);
 119
 120         edid_set_framebuffer_bits_per_pixel(&edid, 32, 0);
 121
 122         mtk_ddp_mode_set(&edid, panel->disp_path);
 123         info = fb_new_framebuffer_info_from_edid(&edid, (uintptr_t)0);
 124         if (info)
 125                 fb_set_orientation(info, panel->orientation);
 126
 127         return 0;
 128 }