^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2013 Intel Corporation; author Matt Fleming
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/efi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/font.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/serial_core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/screen_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/early_ioremap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static const struct console *earlycon_console __initdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static const struct font_desc *font;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static u32 efi_x, efi_y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static u64 fb_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static bool fb_wb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static void *efi_fb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * EFI earlycon needs to use early_memremap() to map the framebuffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * But early_memremap() is not usable for 'earlycon=efifb keep_bootcon',
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * memremap() should be used instead. memremap() will be available after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * paging_init() which is earlier than initcall callbacks. Thus adding this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * early initcall function early_efi_map_fb() to map the whole EFI framebuffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int __init efi_earlycon_remap_fb(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* bail if there is no bootconsole or it has been disabled already */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (!earlycon_console || !(earlycon_console->flags & CON_ENABLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) efi_fb = memremap(fb_base, screen_info.lfb_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) fb_wb ? MEMREMAP_WB : MEMREMAP_WC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return efi_fb ? 0 : -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) early_initcall(efi_earlycon_remap_fb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int __init efi_earlycon_unmap_fb(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /* unmap the bootconsole fb unless keep_bootcon has left it enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (efi_fb && !(earlycon_console->flags & CON_ENABLED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) memunmap(efi_fb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) late_initcall(efi_earlycon_unmap_fb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static __ref void *efi_earlycon_map(unsigned long start, unsigned long len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) pgprot_t fb_prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (efi_fb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return efi_fb + start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) fb_prot = fb_wb ? PAGE_KERNEL : pgprot_writecombine(PAGE_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return early_memremap_prot(fb_base + start, len, pgprot_val(fb_prot));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static __ref void efi_earlycon_unmap(void *addr, unsigned long len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (efi_fb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) early_memunmap(addr, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static void efi_earlycon_clear_scanline(unsigned int y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) unsigned long *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) u16 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) len = screen_info.lfb_linelength;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) dst = efi_earlycon_map(y*len, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (!dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) memset(dst, 0, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) efi_earlycon_unmap(dst, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static void efi_earlycon_scroll_up(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) unsigned long *dst, *src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) u16 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) u32 i, height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) len = screen_info.lfb_linelength;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) height = screen_info.lfb_height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) for (i = 0; i < height - font->height; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) dst = efi_earlycon_map(i*len, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (!dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) src = efi_earlycon_map((i + font->height) * len, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (!src) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) efi_earlycon_unmap(dst, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) memmove(dst, src, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) efi_earlycon_unmap(src, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) efi_earlycon_unmap(dst, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static void efi_earlycon_write_char(u32 *dst, unsigned char c, unsigned int h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) const u32 color_black = 0x00000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) const u32 color_white = 0x00ffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) const u8 *src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) int m, n, bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) u8 x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) bytes = BITS_TO_BYTES(font->width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) src = font->data + c * font->height * bytes + h * bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) for (m = 0; m < font->width; m++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) n = m % 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) x = *(src + m / 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if ((x >> (7 - n)) & 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) *dst = color_white;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) *dst = color_black;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) dst++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) efi_earlycon_write(struct console *con, const char *str, unsigned int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct screen_info *si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) const char *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) void *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) si = &screen_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) len = si->lfb_linelength;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) while (num) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) unsigned int linemax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) unsigned int h, count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) for (s = str; *s && *s != '\n'; s++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (count == num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) linemax = (si->lfb_width - efi_x) / font->width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (count > linemax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) count = linemax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) for (h = 0; h < font->height; h++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) unsigned int n, x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) dst = efi_earlycon_map((efi_y + h) * len, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (!dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) s = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) n = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) x = efi_x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) while (n-- > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) efi_earlycon_write_char(dst + x*4, *s, h);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) x += font->width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) s++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) efi_earlycon_unmap(dst, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) num -= count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) efi_x += count * font->width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) str += count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (num > 0 && *s == '\n') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) efi_x = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) efi_y += font->height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) str++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) num--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (efi_x + font->width > si->lfb_width) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) efi_x = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) efi_y += font->height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (efi_y + font->height > si->lfb_height) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) u32 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) efi_y -= font->height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) efi_earlycon_scroll_up();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) for (i = 0; i < font->height; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) efi_earlycon_clear_scanline(efi_y + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static int __init efi_earlycon_setup(struct earlycon_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) const char *opt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct screen_info *si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) u16 xres, yres;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) u32 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) fb_base = screen_info.lfb_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) fb_base |= (u64)screen_info.ext_lfb_base << 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) fb_wb = opt && !strcmp(opt, "ram");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) si = &screen_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) xres = si->lfb_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) yres = si->lfb_height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * efi_earlycon_write_char() implicitly assumes a framebuffer with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * 32 bits per pixel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (si->lfb_depth != 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) font = get_default_font(xres, yres, -1, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (!font)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) efi_y = rounddown(yres, font->height) - font->height;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) for (i = 0; i < (yres - efi_y) / font->height; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) efi_earlycon_scroll_up();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) device->con->write = efi_earlycon_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) earlycon_console = device->con;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) EARLYCON_DECLARE(efifb, efi_earlycon_setup);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags