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bochsvga: add edid support. 

Read EDID blob from mmio bar, store in VBE_edid.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2019-03-19 11:48:13 +01:00
parent 588eb12163
commit 083801db10
1 changed files with 16 additions and 3 deletions
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19
vgasrc/bochsvga.c
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@ -325,19 +325,25 @@ bochsvga_setup(void)
return 0;
u32 lfb_addr = VBE_DISPI_LFB_PHYSICAL_ADDRESS;
u32 io_addr = 0;
int bdf = GET_GLOBAL(VgaBDF);
if (CONFIG_VGA_PCI && bdf >= 0) {
u16 vendor = pci_config_readw(bdf, PCI_VENDOR_ID);
int barid;
int barid, bar;
switch (vendor) {
case 0x15ad: /* qemu vmware vga */
barid = 1;
break;
default: /* stdvga, qxl, virtio */
case 0x1234: /* stdvga */
bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_2);
io_addr = bar & PCI_BASE_ADDRESS_IO_MASK;
barid = 0;
break;
default: /* qxl, virtio */
barid = 0;
break;
}
u32 bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_0 + barid * 4);
bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_0 + barid * 4);
lfb_addr = bar & PCI_BASE_ADDRESS_MEM_MASK;
dprintf(1, "VBE DISPI: bdf %02x:%02x.%x, bar %d\n", pci_bdf_to_bus(bdf)
, pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf), barid);
@ -373,5 +379,12 @@ bochsvga_setup(void)
}
}
if (io_addr) {
int i;
u8 *edid = (void*)(io_addr);
for (i = 0; i < sizeof(VBE_edid); i++)
SET_VGA(VBE_edid[i], readb(edid + i));
}
return 0;
}