diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/edid.h | 8 | ||||
| -rw-r--r-- | src/lib/edid.c | 24 |
2 files changed, 28 insertions, 4 deletions
diff --git a/src/include/edid.h b/src/include/edid.h index 7d4736dc33..ce1f615709 100644 --- a/src/include/edid.h +++ b/src/include/edid.h @@ -55,6 +55,14 @@ struct edid { unsigned int vso; unsigned int vspw; unsigned int vborder; + /* 3 variables needed for coreboot framebuffer. + * In most cases, they are the same as the ha + * and va variables, but not always, as in the + * case of a 1366 wide display. + */ + u32 x_resolution; + u32 y_resolution; + u32 bytes_per_line; /* it is unlikely we need these things. */ /* if one of these is non-zero, use that one. */ unsigned int aspect_landscape; diff --git a/src/lib/edid.c b/src/lib/edid.c index d0e8b98b52..aa12596d89 100644 --- a/src/lib/edid.c +++ b/src/lib/edid.c @@ -457,6 +457,23 @@ detailed_block(struct edid *out, unsigned char *x, int in_extension) out->vso = ((x[10] >> 4) + ((x[11] & 0x0C) << 2)); out->vspw = ((x[10] & 0x0F) + ((x[11] & 0x03) << 4)); out->vborder = x[16]; + /* set up some reasonable defaults for payloads. + * We observe that most modern chipsets we work with + * tend to support rgb888 without regard to the + * panel bits per color or other settings. The rgb888 + * is a convenient layout for software because + * it avoids the messy bit stuffing of rgb565 or rgb444. + * It makes a reasonable trade of memory for speed. + * So, set up the default for + * 32 bits per pixel + * rgb888 (i.e. no alpha, but pixels on 32-bit boundaries) + * The mainboard can modify these if needed, though + * we have yet to see a case where that will happen. + */ + out->bpp = 32; + out->x_resolution = ALIGN(out->ha * ((out->bpp + 7) / 8),64) / (out->bpp/8); + out->y_resolution = out->va; + out->bytes_per_line = ALIGN(out->ha * ((out->bpp + 7) / 8),64); printk(BIOS_SPEW, "Did detailed timing\n"); } did_detailed_timing = 1; @@ -1398,8 +1415,9 @@ int decode_edid(unsigned char *edid, int size, struct edid *out) void set_vbe_mode_info_valid(struct edid *edid, uintptr_t fb_addr) { edid_fb.physical_address = fb_addr; - edid_fb.x_resolution = edid->ha; - edid_fb.y_resolution = edid->va; + 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.) 24bpp, the convention nowadays * seems to be to round it up to the nearest reasonable * boundary, because otherwise the byte-packing is hideous. @@ -1416,7 +1434,6 @@ void set_vbe_mode_info_valid(struct edid *edid, uintptr_t fb_addr) case 32: case 24: /* packed into 4-byte words */ - edid_fb.bytes_per_line = edid->ha * 4; edid_fb.red_mask_pos = 16; edid_fb.red_mask_size = 8; edid_fb.green_mask_pos = 8; @@ -1426,7 +1443,6 @@ void set_vbe_mode_info_valid(struct edid *edid, uintptr_t fb_addr) break; case 16: /* packed into 2-byte words */ - edid_fb.bytes_per_line = edid->ha * 2; edid_fb.red_mask_pos = 12; edid_fb.red_mask_size = 4; edid_fb.green_mask_pos = 8; |