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ARM: riscpc: parse video information from tagged list 

Correctly parse the video information from the tagged list, so that we
end up with the right bytes-per-char values.  When booting with a
tagged list rather than a param block, this allows the decompressor to
display its messages during boot on the screen.

(Boot loaders normally pass a param block on this platform, but the
latest boot loader version recently released does not.)

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King 2019-04-27 23:06:03 +01:00
parent 1eac59d731
commit e579201a83
1 changed files with 8 additions and 15 deletions
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23
arch/arm/mach-rpc/include/mach/uncompress.h
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@ -118,29 +118,22 @@ static void arch_decomp_setup(void)
struct tag *t = (struct tag *)params;
unsigned int nr_pages = 0, page_size = PAGE_SIZE;
if (t->hdr.tag == ATAG_CORE)
{
for (; t->hdr.size; t = tag_next(t))
{
if (t->hdr.tag == ATAG_VIDEOTEXT)
{
if (t->hdr.tag == ATAG_CORE) {
for (; t->hdr.size; t = tag_next(t)) {
if (t->hdr.tag == ATAG_VIDEOTEXT) {
video_num_rows = t->u.videotext.video_lines;
video_num_cols = t->u.videotext.video_cols;
bytes_per_char_h = t->u.videotext.video_points;
bytes_per_char_v = t->u.videotext.video_points;
video_x = t->u.videotext.x;
video_y = t->u.videotext.y;
}
if (t->hdr.tag == ATAG_MEM)
{
} else if (t->hdr.tag == ATAG_VIDEOLFB) {
bytes_per_char_h = t->u.videolfb.lfb_depth;
bytes_per_char_v = 8;
} else if (t->hdr.tag == ATAG_MEM) {
page_size = PAGE_SIZE;
nr_pages += (t->u.mem.size / PAGE_SIZE);
}
}
}
else
{
} else {
nr_pages = params->nr_pages;
page_size = params->page_size;
video_num_rows = params->video_num_rows;