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lib/edid: Split out fill_lb_framebuffer()

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Place it into new edid_fill_fb.c, and invert the logic of the Kconfig
guard (NATIVE_VGA_INIT_USE_EDID is now !NO_EDID_FILL_FB). It has to be
selected by all drivers that use MAINBOARD_DO_NATIVE_VGA_INIT but pro-
vide their own fill_lb_framebuffer() implementation.

Change-Id: I90634b835bd8e2d150b1c714328a5b2774d891bd
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/19764
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Nico Huber
2017-05-18 18:07:34 +02:00
committed by Martin Roth
parent e801fcb421
commit 3db7653aab
9 changed files with 109 additions and 78 deletions
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70
src/lib/edid.c
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@ -94,9 +94,6 @@ static struct {
static struct edid tmp_edid;
static int vbe_valid;
static struct lb_framebuffer edid_fb;
static char *manufacturer_name(unsigned char *x)
{
extra_info.manuf_name[0] = ((x[0] & 0x7C) >> 2) + '@';
@ -1693,70 +1690,3 @@ void edid_set_framebuffer_bits_per_pixel(struct edid *edid, int fb_bpp,
edid->x_resolution = edid->bytes_per_line / (fb_bpp / 8);
edid->y_resolution = edid->mode.va;
}
/*
* Take an edid, and create a framebuffer. Set vbe_valid to 1.
*/
void set_vbe_mode_info_valid(const struct edid *edid, uintptr_t fb_addr)
{
edid_fb.physical_address = fb_addr;
edid_fb.x_resolution = edid->x_resolution;
edid_fb.y_resolution = edid->y_resolution;
edid_fb.bytes_per_line = edid->bytes_per_line;
/* In the case of (e.g.) 24 framebuffer bits per pixel, the convention
* nowadays seems to be to round it up to the nearest reasonable
* boundary, because otherwise the byte-packing is hideous.
* So, for example, in RGB with no alpha, the bytes are still
* packed into 32-bit words, the so-called 32bpp-no-alpha mode.
* Or, in 5:6:5 mode, the bytes are also packed into 32-bit words,
* and in 4:4:4 mode, they are packed into 16-bit words.
* Good call on the hardware guys part.
* It's not clear we're covering all cases here, but
* I'm not sure with grahpics you ever can.
*/
edid_fb.bits_per_pixel = edid->framebuffer_bits_per_pixel;
edid_fb.reserved_mask_pos = 0;
edid_fb.reserved_mask_size = 0;
switch (edid->framebuffer_bits_per_pixel) {
case 32:
case 24:
/* packed into 4-byte words */
edid_fb.reserved_mask_pos = 24;
edid_fb.reserved_mask_size = 8;
edid_fb.red_mask_pos = 16;
edid_fb.red_mask_size = 8;
edid_fb.green_mask_pos = 8;
edid_fb.green_mask_size = 8;
edid_fb.blue_mask_pos = 0;
edid_fb.blue_mask_size = 8;
break;
case 16:
/* packed into 2-byte words */
edid_fb.red_mask_pos = 11;
edid_fb.red_mask_size = 5;
edid_fb.green_mask_pos = 5;
edid_fb.green_mask_size = 6;
edid_fb.blue_mask_pos = 0;
edid_fb.blue_mask_size = 5;
break;
default:
printk(BIOS_SPEW, "%s: unsupported BPP %d\n", __func__,
edid->framebuffer_bits_per_pixel);
return;
}
vbe_valid = 1;
}
#if IS_ENABLED(CONFIG_NATIVE_VGA_INIT_USE_EDID)
int fill_lb_framebuffer(struct lb_framebuffer *framebuffer)
{
if (!vbe_valid)
return -1;
*framebuffer = edid_fb;
return 0;
}
#endif