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| author | H. Peter Anvin <hpa@zytor.com> | 2007-09-13 14:14:29 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2007-09-20 11:06:58 -0700 |
| commit | 3f662b3f6e422a15fefcbaf4bdd21f97e6bcf32d (patch) | |
| tree | cabd8b62dd391164afbfc0f0feb489d661a92f69 /arch/i386/boot/video.c | |
| parent | 81cfe79b9c577139a873483654640eb3f6e78c39 (diff) | |
| download | lwn-3f662b3f6e422a15fefcbaf4bdd21f97e6bcf32d.tar.gz lwn-3f662b3f6e422a15fefcbaf4bdd21f97e6bcf32d.zip | |
[x86 setup] Present the canonical video mode number to the kernel
Canonicalize the video mode number as presented to the kernel. The
video mode number may be user-entered (e.g. ASK_VGA), an alias
(e.g. NORMAL_VGA), or a size specification, and that confuses the
suspend wakeup code.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/i386/boot/video.c')
| -rw-r--r-- | arch/i386/boot/video.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/i386/boot/video.c b/arch/i386/boot/video.c index 693f20d3102e..e4ba897bf9a3 100644 --- a/arch/i386/boot/video.c +++ b/arch/i386/boot/video.c @@ -147,7 +147,7 @@ int mode_defined(u16 mode) } /* Set mode (without recalc) */ -static int raw_set_mode(u16 mode) +static int raw_set_mode(u16 mode, u16 *real_mode) { int nmode, i; struct card_info *card; @@ -165,8 +165,10 @@ static int raw_set_mode(u16 mode) if ((mode == nmode && visible) || mode == mi->mode || - mode == (mi->y << 8)+mi->x) + mode == (mi->y << 8)+mi->x) { + *real_mode = mi->mode; return card->set_mode(mi); + } if (visible) nmode++; @@ -178,7 +180,7 @@ static int raw_set_mode(u16 mode) if (mode >= card->xmode_first && mode < card->xmode_first+card->xmode_n) { struct mode_info mix; - mix.mode = mode; + *real_mode = mix.mode = mode; mix.x = mix.y = 0; return card->set_mode(&mix); } @@ -223,6 +225,7 @@ static void vga_recalc_vertical(void) static int set_mode(u16 mode) { int rv; + u16 real_mode; /* Very special mode numbers... */ if (mode == VIDEO_CURRENT_MODE) @@ -232,13 +235,16 @@ static int set_mode(u16 mode) else if (mode == EXTENDED_VGA) mode = VIDEO_8POINT; - rv = raw_set_mode(mode); + rv = raw_set_mode(mode, &real_mode); if (rv) return rv; if (mode & VIDEO_RECALC) vga_recalc_vertical(); + /* Save the canonical mode number for the kernel, not + an alias, size specification or menu position */ + boot_params.hdr.vid_mode = real_mode; return 0; } |