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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <boot/coreboot_tables.h>
#include <console/console.h>
#include <fsp/graphics.h>
#include <fsp/util.h>
#include <soc/intel/common/vbt.h>
#include <types.h>
#include <framebuffer_info.h>
enum pixel_format {
pixel_rgbx_8bpc = 0,
pixel_bgrx_8bpc = 1,
pixel_bitmask = 2, /* defined by <rgb>_mask values */
};
static const uint8_t fsp_graphics_info_guid[16] = {
0xce, 0x2c, 0xf6, 0x39, 0x25, 0x68, 0x69, 0x46,
0xbb, 0x56, 0x54, 0x1a, 0xba, 0x75, 0x3a, 0x07
};
struct hob_graphics_info {
uint64_t framebuffer_base;
uint32_t framebuffer_size;
uint32_t version;
uint32_t horizontal_resolution;
uint32_t vertical_resolution;
uint32_t pixel_format; /* See enum pixel_format */
uint32_t red_mask;
uint32_t green_mask;
uint32_t blue_mask;
uint32_t reserved_mask;
uint32_t pixels_per_scanline;
} __packed;
struct pixel {
uint8_t pos;
uint8_t size;
};
static const struct fsp_framebuffer {
struct pixel red;
struct pixel green;
struct pixel blue;
struct pixel rsvd;
} fsp_framebuffer_format_map[] = {
[pixel_rgbx_8bpc] = { {0, 8}, {8, 8}, {16, 8}, {24, 8} },
[pixel_bgrx_8bpc] = { {16, 8}, {8, 8}, {0, 8}, {24, 8} },
};
void fsp_report_framebuffer_info(const uintptr_t framebuffer_bar)
{
size_t size;
const struct hob_graphics_info *ginfo;
const struct fsp_framebuffer *fbinfo;
/*
* Pci enumeration happens after silicon init.
* After enumeration graphic framebuffer base may be relocated.
*/
if (!framebuffer_bar) {
printk(BIOS_ALERT, "Framebuffer BAR invalid\n");
return;
}
ginfo = fsp_find_extension_hob_by_guid(fsp_graphics_info_guid, &size);
if (!ginfo) {
printk(BIOS_ALERT, "Graphics hand-off block not found\n");
return;
}
if (ginfo->pixel_format >= ARRAY_SIZE(fsp_framebuffer_format_map)) {
printk(BIOS_ALERT, "FSP set unknown framebuffer format: %d\n",
ginfo->pixel_format);
return;
}
fbinfo = fsp_framebuffer_format_map + ginfo->pixel_format;
const struct lb_framebuffer fb = {
.physical_address = framebuffer_bar,
.x_resolution = ginfo->horizontal_resolution,
.y_resolution = ginfo->vertical_resolution,
.bytes_per_line = ginfo->pixels_per_scanline * 4,
.bits_per_pixel = fbinfo->rsvd.size + fbinfo->red.size +
fbinfo->green.size + fbinfo->blue.size,
.red_mask_pos = fbinfo->red.pos,
.red_mask_size = fbinfo->red.size,
.green_mask_pos = fbinfo->green.pos,
.green_mask_size = fbinfo->green.size,
.blue_mask_pos = fbinfo->blue.pos,
.blue_mask_size = fbinfo->blue.size,
.reserved_mask_pos = fbinfo->rsvd.pos,
.reserved_mask_size = fbinfo->rsvd.size,
.orientation = LB_FB_ORIENTATION_NORMAL,
};
fb_add_framebuffer_info_ex(&fb);
}
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