src/soc/rockchip/rk3288/display.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright 2014 Rockchip Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <arch/cache.h>
  17 #include <arch/io.h>
  18 #include <console/console.h>
  19 #include <device/device.h>
  20 #include <delay.h>
  21 #include <edid.h>
  22 #include <gpio.h>
  23 #include <stdlib.h>
  24 #include <stddef.h>
  25 #include <string.h>
  26 #include <soc/addressmap.h>
  27 #include <soc/clock.h>
  28 #include <soc/display.h>
  29 #include <soc/edp.h>
  30 #include <soc/hdmi.h>
  31 #include <soc/gpio.h>
  32 #include <soc/grf.h>
  33 #include <soc/soc.h>
  34 #include <soc/vop.h>
  35
  36 #include "chip.h"
  37
  38 void rk_display_init(device_t dev, u32 lcdbase,
  39                 unsigned long fb_size)
  40 {
  41         struct edid edid;
  42         struct soc_rockchip_rk3288_config *conf = dev->chip_info;
  43         uint32_t lower = ALIGN_DOWN(lcdbase, MiB);
  44         uint32_t upper = ALIGN_UP(lcdbase + fb_size, MiB);
  45         enum vop_modes detected_mode = VOP_MODE_UNKNOWN;
  46
  47         printk(BIOS_SPEW, "LCD framebuffer @%p\n", (void *)(lcdbase));
  48         memset((void *)lcdbase, 0, fb_size);    /* clear the framebuffer */
  49         dcache_clean_invalidate_by_mva((void *)lower, upper - lower);
  50         mmu_config_range(lower / MiB, (upper - lower) / MiB, DCACHE_OFF);
  51
  52         switch (conf->vop_mode) {
  53         case VOP_MODE_NONE:
  54                 return;
  55         case VOP_MODE_AUTO_DETECT:
  56                 /* try EDP first, then HDMI */
  57         case VOP_MODE_EDP:
  58                 printk(BIOS_DEBUG, "Attempting to setup EDP display.\n");
  59                 rkclk_configure_edp();
  60                 rkclk_configure_vop_aclk(conf->vop_id, 192 * MHz);
  61                 rk_edp_init(conf->vop_id);
  62
  63                 if (rk_edp_get_edid(&edid) == 0) {
  64                         detected_mode = VOP_MODE_EDP;
  65                         break;
  66                 } else {
  67                         printk(BIOS_WARNING, "Cannot get EDID from EDP.\n");
  68                         if (conf->vop_mode == VOP_MODE_EDP)
  69                                 return;
  70                 }
  71                 /* fall thru */
  72         case VOP_MODE_HDMI:
  73                 printk(BIOS_DEBUG, "Attempting to setup HDMI display.\n");
  74                 rkclk_configure_hdmi();
  75                 rkclk_configure_vop_aclk(conf->vop_id, 384 * MHz);
  76                 rk_hdmi_init(conf->vop_id);
  77
  78                 if (rk_hdmi_get_edid(&edid) == 0) {
  79                         detected_mode = VOP_MODE_HDMI;
  80                         break;
  81                 } else {
  82                         printk(BIOS_WARNING, "Cannot get EDID from HDMI.\n");
  83                         if (conf->vop_mode == VOP_MODE_HDMI)
  84                                 return;
  85                 }
  86                 /* fall thru */
  87         default:
  88                 printk(BIOS_WARNING, "Cannot read any edid info, aborting.\n");
  89                 return;
  90         }
  91
  92         if (rkclk_configure_vop_dclk(conf->vop_id, edid.mode.pixel_clock * KHz)) {
  93                 printk(BIOS_WARNING, "config vop err\n");
  94                 return;
  95         }
  96
  97         edid.framebuffer_bits_per_pixel = conf->framebuffer_bits_per_pixel;
  98         edid.bytes_per_line = edid.mode.ha * conf->framebuffer_bits_per_pixel / 8;
  99         edid.x_resolution = edid.mode.ha;
 100         edid.y_resolution = edid.mode.va;
 101         rkvop_mode_set(conf->vop_id, &edid, detected_mode);
 102
 103         rkvop_enable(conf->vop_id, lcdbase, &edid);
 104
 105         switch (detected_mode) {
 106         case VOP_MODE_HDMI:
 107                 if (rk_hdmi_enable(&edid)) {
 108                         printk(BIOS_WARNING, "hdmi enable err\n");
 109                         return;
 110                 }
 111
 112                 /*
 113                  * HACK: if we do remove this delay, HDMI TV may not show
 114                  * anythings. So we make an delay here, ensure TV have
 115                  * enough time to respond.
 116                  */
 117                 mdelay(2000);
 118                 break;
 119
 120         case VOP_MODE_EDP:
 121         default:
 122                 if (rk_edp_enable()) {
 123                         printk(BIOS_WARNING, "edp enable err\n");
 124                         return;
 125                 }
 126                 mainboard_power_on_backlight();
 127                 break;
 128         }
 129
 130         set_vbe_mode_info_valid(&edid, (uintptr_t)lcdbase);
 131 }