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linux: Fall back to text mode if unable to set video mode (see #137)

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mintsuki 2021-11-27 00:06:06 +01:00
parent 89f6d7ddeb
commit dab74fd81a
1 changed files with 33 additions and 18 deletions
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51
stage23/protos/linux.c
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@ -14,6 +14,7 @@
#include <lib/fb.h>
#include <lib/acpi.h>
#include <drivers/edid.h>
#include <drivers/vga_textmode.h>
__attribute__((noreturn)) void linux_spinup(void *entry, void *boot_params);
@ -501,30 +502,44 @@ bool linux_load(char *config, char *cmdline) {
parse_resolution(&req_width, &req_height, &req_bpp, resolution);
struct fb_info fbinfo;
if (!fb_init(&fbinfo, req_width, req_height, req_bpp))
if (!fb_init(&fbinfo, req_width, req_height, req_bpp)) {
#if uefi == 1
panic("linux: Unable to set video mode");
#elif bios == 1
size_t rows, cols;
init_vga_textmode(&rows, &cols, false);
screen_info->capabilities = VIDEO_CAPABILITY_64BIT_BASE | VIDEO_CAPABILITY_SKIP_QUIRKS;
screen_info->flags = VIDEO_FLAGS_NOCURSOR;
screen_info->lfb_base = (uint32_t)fbinfo.framebuffer_addr;
screen_info->ext_lfb_base = (uint32_t)(fbinfo.framebuffer_addr >> 32);
screen_info->lfb_size = fbinfo.framebuffer_pitch * fbinfo.framebuffer_height;
screen_info->lfb_width = fbinfo.framebuffer_width;
screen_info->lfb_height = fbinfo.framebuffer_height;
screen_info->lfb_depth = fbinfo.framebuffer_bpp;
screen_info->lfb_linelength = fbinfo.framebuffer_pitch;
screen_info->red_size = fbinfo.red_mask_size;
screen_info->red_pos = fbinfo.red_mask_shift;
screen_info->green_size = fbinfo.green_mask_size;
screen_info->green_pos = fbinfo.green_mask_shift;
screen_info->blue_size = fbinfo.blue_mask_size;
screen_info->blue_pos = fbinfo.blue_mask_shift;
screen_info->orig_video_mode = 3;
screen_info->orig_video_ega_bx = 3;
screen_info->orig_video_lines = rows;
screen_info->orig_video_cols = cols;
screen_info->orig_video_points = 16;
screen_info->orig_video_isVGA = VIDEO_TYPE_VGAC;
#endif
} else {
screen_info->capabilities = VIDEO_CAPABILITY_64BIT_BASE | VIDEO_CAPABILITY_SKIP_QUIRKS;
screen_info->flags = VIDEO_FLAGS_NOCURSOR;
screen_info->lfb_base = (uint32_t)fbinfo.framebuffer_addr;
screen_info->ext_lfb_base = (uint32_t)(fbinfo.framebuffer_addr >> 32);
screen_info->lfb_size = fbinfo.framebuffer_pitch * fbinfo.framebuffer_height;
screen_info->lfb_width = fbinfo.framebuffer_width;
screen_info->lfb_height = fbinfo.framebuffer_height;
screen_info->lfb_depth = fbinfo.framebuffer_bpp;
screen_info->lfb_linelength = fbinfo.framebuffer_pitch;
screen_info->red_size = fbinfo.red_mask_size;
screen_info->red_pos = fbinfo.red_mask_shift;
screen_info->green_size = fbinfo.green_mask_size;
screen_info->green_pos = fbinfo.green_mask_shift;
screen_info->blue_size = fbinfo.blue_mask_size;
screen_info->blue_pos = fbinfo.blue_mask_shift;
#if bios == 1
screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
#elif uefi == 1
screen_info->orig_video_isVGA = VIDEO_TYPE_EFI;
screen_info->orig_video_isVGA = VIDEO_TYPE_EFI;
#endif
}
struct edid_info_struct *edid_info = get_edid_info();