blob: 776711bd698181ffa3a9365a60d3689d67180284 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <amdblocks/graphics.h>
#include <amdblocks/vbt.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <fsp/graphics.h>
void fsp_graphics_init(struct device *const dev)
{
struct resource *res = probe_resource(dev, PCI_BASE_ADDRESS_0);
if (res && res->base)
fsp_report_framebuffer_info(res->base, LB_FB_ORIENTATION_NORMAL);
else
printk(BIOS_ERR, "%s: Unable to find resource for %s\n",
__func__, dev_path(dev));
/*
* Calculate and set checksum for VBIOS data if FSP GOP driver used,
* Since GOP driver modifies ATOMBIOS tables at end of BS_DEV_RESOURCES.
* While Linux does not verify the checksum the Windows kernel driver does.
*/
struct rom_header *vbios = (struct rom_header *)vbt_get();
if (!vbios || !vbios->size) {
printk(BIOS_ERR, "%s: No VGA BIOS loaded for %s\n",
__func__, dev_path(dev));
return;
}
uint8_t *data = (uint8_t *)vbios;
/* Clear existing checksum before recalculating */
data[VFCT_VBIOS_CHECKSUM_OFFSET] = 0;
data[VFCT_VBIOS_CHECKSUM_OFFSET] =
acpi_checksum(data, vbios->size * 512);
}
|
