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/* SPDX-License-Identifier: MIT */
#include <console/console.h>
#include <edid.h>
#include <boot/coreboot_tables.h>
#include <framebuffer_info.h>
#include <string.h>
#include <stdlib.h>
#include <commonlib/list.h>
struct fb_info {
struct list_node node;
struct lb_framebuffer fb;
};
static struct list_node list;
/*
* Allocate a new framebuffer info struct on heap.
* Returns NULL on error.
*/
static struct fb_info *fb_new_framebuffer_info(void)
{
struct fb_info *ret;
ret = malloc(sizeof(struct fb_info));
if (ret)
memset(ret, 0, sizeof(struct fb_info));
return ret;
}
/*
* Fills a provided framebuffer info struct and adds it to the internal list if it's
* valid. Returns NULL on error.
*/
struct fb_info *
fb_add_framebuffer_info_ex(const struct lb_framebuffer *fb)
{
struct fb_info *info;
uint8_t bpp_mask;
/* Validate input */
if (!fb || !fb->x_resolution || !fb->y_resolution || !fb->bytes_per_line ||
!fb->bits_per_pixel) {
printk(BIOS_ERR, "%s: Invalid framebuffer data provided\n", __func__);
return NULL;
}
bpp_mask = fb->blue_mask_size + fb->green_mask_size + fb->red_mask_size +
fb->reserved_mask_size;
if (bpp_mask > fb->bits_per_pixel) {
printk(BIOS_ERR,
"%s: channel bit mask=%d is greater than BPP=%d ."
" This is a driver bug. Framebuffer is invalid.\n",
__func__, bpp_mask, fb->bits_per_pixel);
return NULL;
} else if (bpp_mask != fb->bits_per_pixel) {
printk(BIOS_WARNING,
"%s: channel bit mask=%d and BPP=%d don't match."
" This is a driver bug.\n",
__func__, bpp_mask, fb->bits_per_pixel);
}
info = fb_new_framebuffer_info();
if (!info)
return NULL;
printk(BIOS_INFO, "framebuffer_info: bytes_per_line: %d, bits_per_pixel: %d\n "
" x_res x y_res: %d x %d, size: %d at 0x%llx\n",
fb->bytes_per_line, fb->bits_per_pixel, fb->x_resolution,
fb->y_resolution, (fb->bytes_per_line * fb->y_resolution),
fb->physical_address);
/* Update */
info->fb = *fb;
list_insert_after(&info->node, &list);
return info;
}
/*
* Allocates a new framebuffer info struct and fills it for 32/24/16bpp framebuffers.
* Intended for drivers that only support reporting the current information or have a single
* modeset invocation.
*
* Complex drivers should use fb_add_framebuffer_info_ex() instead.
*/
struct fb_info *
fb_add_framebuffer_info(uintptr_t fb_addr, uint32_t x_resolution,
uint32_t y_resolution, uint32_t bytes_per_line,
uint8_t bits_per_pixel)
{
struct fb_info *info = NULL;
switch (bits_per_pixel) {
case 32:
case 24: {
/* FIXME: 24 BPP might be RGB8 or XRGB8 */
/* packed into 4-byte words */
const struct lb_framebuffer fb = {
.physical_address = fb_addr,
.x_resolution = x_resolution,
.y_resolution = y_resolution,
.bytes_per_line = bytes_per_line,
.bits_per_pixel = bits_per_pixel,
.red_mask_pos = 16,
.red_mask_size = 8,
.green_mask_pos = 8,
.green_mask_size = 8,
.blue_mask_pos = 0,
.blue_mask_size = 8,
.reserved_mask_pos = 24,
.reserved_mask_size = 8,
.orientation = LB_FB_ORIENTATION_NORMAL,
};
info = fb_add_framebuffer_info_ex(&fb);
break;
}
case 16: {
/* packed into 2-byte words */
const struct lb_framebuffer fb = {
.physical_address = fb_addr,
.x_resolution = x_resolution,
.y_resolution = y_resolution,
.bytes_per_line = bytes_per_line,
.bits_per_pixel = 16,
.red_mask_pos = 11,
.red_mask_size = 5,
.green_mask_pos = 5,
.green_mask_size = 6,
.blue_mask_pos = 0,
.blue_mask_size = 5,
.reserved_mask_pos = 0,
.reserved_mask_size = 0,
.orientation = LB_FB_ORIENTATION_NORMAL,
};
info = fb_add_framebuffer_info_ex(&fb);
break;
}
default:
printk(BIOS_ERR, "%s: unsupported BPP %d\n", __func__, bits_per_pixel);
}
if (!info)
printk(BIOS_ERR, "%s: failed to add framebuffer info\n", __func__);
return info;
}
/* Wrapper for Ada to have a simpler function signature */
int fb_add_framebuffer_info_simple(uintptr_t fb_addr, uint32_t x_res, uint32_t y_res,
uint32_t bytes_per_line, uint8_t bits_per_pixel)
{
return fb_add_framebuffer_info(fb_addr, x_res, y_res, bytes_per_line, bits_per_pixel) != NULL;
}
void fb_set_orientation(struct fb_info *info, enum lb_fb_orientation orientation)
{
if (!info)
return;
info->fb.orientation = orientation;
}
/*
* Take an edid, and create a framebuffer.
*/
struct fb_info *fb_new_framebuffer_info_from_edid(const struct edid *edid,
uintptr_t fb_addr)
{
return fb_add_framebuffer_info(fb_addr, edid->x_resolution, edid->y_resolution,
edid->bytes_per_line, edid->framebuffer_bits_per_pixel);
}
int fill_lb_framebuffer(struct lb_framebuffer *framebuffer)
{
struct fb_info *i;
list_for_each(i, list, node) {
//TODO: Add support for advertising all framebuffers in this list
*framebuffer = i->fb;
return 0;
}
return -1;
}
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