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Code Issues Releases Wiki Activity

bochsdisplay: parse resolution from edid. 

Then use the resolution for the framebuffer.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2019-03-19 12:20:52 +01:00
parent 2f87fe393c
commit a3fd63c234
1 changed files with 16 additions and 8 deletions
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24
vgasrc/bochsdisplay.c
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@ -10,8 +10,6 @@
#define FRAMEBUFFER_WIDTH 1024
#define FRAMEBUFFER_HEIGHT 768
#define FRAMEBUFFER_BPP 4
#define FRAMEBUFFER_STRIDE (FRAMEBUFFER_BPP * FRAMEBUFFER_WIDTH)
#define FRAMEBUFFER_SIZE (FRAMEBUFFER_STRIDE * FRAMEBUFFER_HEIGHT)
int
bochs_display_setup(void)
@ -46,16 +44,26 @@ bochs_display_setup(void)
for (i = 0; i < sizeof(VBE_edid); i++)
SET_VGA(VBE_edid[i], readb(edid + i));
int fb_width = FRAMEBUFFER_WIDTH;
int fb_height = FRAMEBUFFER_HEIGHT;
if (GET_GLOBAL(VBE_edid[0]) == 0x00 &&
GET_GLOBAL(VBE_edid[1]) == 0xff) {
fb_width = GET_GLOBAL(VBE_edid[54 + 2]);
fb_width |= (GET_GLOBAL(VBE_edid[54 + 4]) & 0xf0) << 4;
fb_height = GET_GLOBAL(VBE_edid[54 + 5]);
fb_height |= (GET_GLOBAL(VBE_edid[54 + 7]) & 0xf0) << 4;
}
int fb_stride = FRAMEBUFFER_BPP * fb_width;
dprintf(1, "bochs-display: using %dx%d, %d bpp (%d stride)\n"
, FRAMEBUFFER_WIDTH, FRAMEBUFFER_HEIGHT
, FRAMEBUFFER_BPP * 8, FRAMEBUFFER_STRIDE);
, fb_width, fb_height
, FRAMEBUFFER_BPP * 8, fb_stride);
cbvga_setup_modes(lfb_addr, FRAMEBUFFER_BPP * 8,
FRAMEBUFFER_WIDTH, FRAMEBUFFER_HEIGHT,
FRAMEBUFFER_STRIDE);
fb_width, fb_height, fb_stride);
writew(dispi + VBE_DISPI_INDEX_XRES, FRAMEBUFFER_WIDTH);
writew(dispi + VBE_DISPI_INDEX_YRES, FRAMEBUFFER_HEIGHT);
writew(dispi + VBE_DISPI_INDEX_XRES, fb_width);
writew(dispi + VBE_DISPI_INDEX_YRES, fb_height);
writew(dispi + VBE_DISPI_INDEX_BPP, FRAMEBUFFER_BPP * 8);
writew(dispi + VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED);