src/soc/rockchip/rk3288/display.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/cache.h>
   4 #include <device/mmio.h>
   5 #include <console/console.h>
   6 #include <device/device.h>
   7 #include <delay.h>
   8 #include <edid.h>
   9 #include <gpio.h>
  10 #include <string.h>
  11 #include <soc/addressmap.h>
  12 #include <soc/clock.h>
  13 #include <soc/display.h>
  14 #include <soc/edp.h>
  15 #include <soc/hdmi.h>
  16 #include <soc/grf.h>
  17 #include <soc/soc.h>
  18 #include <soc/vop.h>
  19 #include <framebuffer_info.h>
  20
  21 #include "chip.h"
  22
  23 void rk_display_init(struct device *dev, u32 lcdbase, unsigned long fb_size)
  24 {
  25         struct edid edid;
  26         uint32_t val;
  27         struct soc_rockchip_rk3288_config *conf = dev->chip_info;
  28         uint32_t lower = ALIGN_DOWN(lcdbase, MiB);
  29         uint32_t upper = ALIGN_UP(lcdbase + fb_size, MiB);
  30         enum vop_modes detected_mode = VOP_MODE_UNKNOWN;
  31
  32         printk(BIOS_SPEW, "LCD framebuffer @%p\n", (void *)(lcdbase));
  33         memset((void *)lcdbase, 0, fb_size);    /* clear the framebuffer */
  34         dcache_clean_invalidate_by_mva((void *)lower, upper - lower);
  35         mmu_config_range(lower / MiB, (upper - lower) / MiB, DCACHE_OFF);
  36
  37         switch (conf->vop_mode) {
  38         case VOP_MODE_NONE:
  39                 return;
  40         case VOP_MODE_AUTO_DETECT:
  41                 /* try EDP first, then HDMI */
  42         case VOP_MODE_EDP:
  43                 printk(BIOS_DEBUG, "Attempting to setup EDP display.\n");
  44                 rkclk_configure_edp();
  45                 rkclk_configure_vop_aclk(conf->vop_id, 192 * MHz);
  46
  47                 /* grf_edp_ref_clk_sel: from internal 24MHz or 27MHz clock */
  48                 write32(&rk3288_grf->soc_con12, RK_SETBITS(1 << 4));
  49
  50                 /* select epd signal from vop0 or vop1 */
  51                 val = (conf->vop_id == 1) ? RK_SETBITS(1 << 5) :
  52                                             RK_CLRBITS(1 << 5);
  53                 write32(&rk3288_grf->soc_con6, val);
  54
  55                 rk_edp_init();
  56
  57                 if (rk_edp_get_edid(&edid) == 0) {
  58                         detected_mode = VOP_MODE_EDP;
  59                         break;
  60                 } else {
  61                         printk(BIOS_WARNING, "Cannot get EDID from EDP.\n");
  62                         if (conf->vop_mode == VOP_MODE_EDP)
  63                                 return;
  64                 }
  65                 __fallthrough;
  66         case VOP_MODE_HDMI:
  67                 printk(BIOS_DEBUG, "Attempting to setup HDMI display.\n");
  68                 rkclk_configure_hdmi();
  69                 rkclk_configure_vop_aclk(conf->vop_id, 384 * MHz);
  70                 rk_hdmi_init(conf->vop_id);
  71
  72                 if (rk_hdmi_get_edid(&edid) == 0) {
  73                         detected_mode = VOP_MODE_HDMI;
  74                         break;
  75                 } else {
  76                         printk(BIOS_WARNING, "Cannot get EDID from HDMI.\n");
  77                         if (conf->vop_mode == VOP_MODE_HDMI)
  78                                 return;
  79                 }
  80                 __fallthrough;
  81         default:
  82                 printk(BIOS_WARNING, "Cannot read any edid info, aborting.\n");
  83                 return;
  84         }
  85
  86         if (rkclk_configure_vop_dclk(conf->vop_id, edid.mode.pixel_clock * KHz)) {
  87                 printk(BIOS_WARNING, "config vop err\n");
  88                 return;
  89         }
  90
  91         edid_set_framebuffer_bits_per_pixel(&edid,
  92                 conf->framebuffer_bits_per_pixel, 0);
  93         rkvop_mode_set(conf->vop_id, &edid, detected_mode);
  94
  95         rkvop_prepare(conf->vop_id, &edid);
  96         rkvop_enable(conf->vop_id, lcdbase);
  97
  98         switch (detected_mode) {
  99         case VOP_MODE_HDMI:
 100                 if (rk_hdmi_enable(&edid)) {
 101                         printk(BIOS_WARNING, "hdmi enable err\n");
 102                         return;
 103                 }
 104
 105                 /*
 106                  * HACK: if we do remove this delay, HDMI TV may not show
 107                  * anythings. So we make an delay here, ensure TV have
 108                  * enough time to respond.
 109                  */
 110                 mdelay(2000);
 111                 break;
 112
 113         case VOP_MODE_EDP:
 114         default:
 115                 if (rk_edp_prepare()) {
 116                         printk(BIOS_WARNING, "edp prepare err\n");
 117                         return;
 118                 }
 119                 if (rk_edp_enable()) {
 120                         printk(BIOS_WARNING, "edp enable err\n");
 121                         return;
 122                 }
 123                 mainboard_power_on_backlight();
 124                 break;
 125         }
 126
 127         fb_new_framebuffer_info_from_edid(&edid, (uintptr_t)lcdbase);
 128 }