diff options
Diffstat (limited to 'src/lib/edid.c')
| -rw-r--r-- | src/lib/edid.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/src/lib/edid.c b/src/lib/edid.c index 52898fbfa6..8bcb95630f 100644 --- a/src/lib/edid.c +++ b/src/lib/edid.c @@ -481,9 +481,14 @@ detailed_block(struct edid *result_edid, unsigned char *x, int in_extension, out->mode.vborder = x[16]; /* We assume rgb888 (32 bits per pixel) framebuffers by default. - * Chipsets that want something else will need to override this - * with another call to edid_set_framebuffer_bits_per_pixel(). */ - edid_set_framebuffer_bits_per_pixel(out, 32); + * Chipsets that want something else will need to override this with + * another call to edid_set_framebuffer_bits_per_pixel(). As a cheap + * heuristic, assume that X86 systems require a 64-byte row alignment + * (since that seems to be true for most Intel chipsets). */ + if (IS_ENABLED(CONFIG_ARCH_X86)) + edid_set_framebuffer_bits_per_pixel(out, 32, 64); + else + edid_set_framebuffer_bits_per_pixel(out, 32, 0); switch ((x[17] & 0x18) >> 3) { case 0x00: @@ -1524,14 +1529,16 @@ int decode_edid(unsigned char *edid, int size, struct edid *out) */ /* Set the framebuffer bits-per-pixel, recalculating all dependent values. */ -void edid_set_framebuffer_bits_per_pixel(struct edid *edid, int fb_bpp) +void edid_set_framebuffer_bits_per_pixel(struct edid *edid, int fb_bpp, + int row_byte_alignment) { /* Caller should pass a supported value, everything else is BUG(). */ assert(fb_bpp == 32 || fb_bpp == 24 || fb_bpp == 16); + row_byte_alignment = max(row_byte_alignment, 1); edid->framebuffer_bits_per_pixel = fb_bpp; edid->bytes_per_line = ALIGN_UP(edid->mode.ha * - div_round_up(fb_bpp, 8), 64); + div_round_up(fb_bpp, 8), row_byte_alignment); edid->x_resolution = edid->bytes_per_line / (fb_bpp / 8); edid->y_resolution = edid->mode.va; } |