diff options
| author | macallan <macallan@NetBSD.org> | 2010-05-04 21:17:10 +0000 |
|---|---|---|
| committer | macallan <macallan@NetBSD.org> | 2010-05-04 21:17:10 +0000 |
| commit | d3a30408f7e0573853ab88566bf4ea9f9a5dcd60 (patch) | |
| tree | 0d03952c5fbac831a72392793f5baa2b466bc3b7 /sys/dev | |
| parent | a2c1ee71884d9caa4e9003f5d0885d50c974629d (diff) | |
add a bunch of small utility functions to pick video modes based on things
like dot clock, resolution etc.
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/videomode/files.videomode | 4 | ||||
| -rw-r--r-- | sys/dev/videomode/pickmode.c | 101 | ||||
| -rw-r--r-- | sys/dev/videomode/videomode.h | 5 |
3 files changed, 108 insertions, 2 deletions
diff --git a/sys/dev/videomode/files.videomode b/sys/dev/videomode/files.videomode index ea29bb829f2..788e4b617cf 100644 --- a/sys/dev/videomode/files.videomode +++ b/sys/dev/videomode/files.videomode @@ -1,4 +1,4 @@ -# $NetBSD: files.videomode,v 1.3 2006/05/11 01:49:53 gdamore Exp $ +# $NetBSD: files.videomode,v 1.4 2010/05/04 21:17:10 macallan Exp $ define videomode define edid @@ -7,5 +7,7 @@ define vesagtf file dev/videomode/videomode.c videomode | edid file dev/videomode/edid.c edid +file dev/videomode/pickmode.c videomode +defflag opt_videomode.h PICKMODE_DEBUG file dev/videomode/vesagtf.c vesagtf | edid diff --git a/sys/dev/videomode/pickmode.c b/sys/dev/videomode/pickmode.c new file mode 100644 index 00000000000..86cc10cb461 --- /dev/null +++ b/sys/dev/videomode/pickmode.c @@ -0,0 +1,101 @@ +/* $NetBSD: pickmode.c,v 1.1 2010/05/04 21:17:10 macallan Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation + * All rights reserved. + * + * this code was contributed to The NetBSD Foundation by Michael Lorenz + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE NETBSD FOUNDATION BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__KERNEL_RCSID(0, "$NetBSD: pickmode.c,v 1.1 2010/05/04 21:17:10 macallan Exp $"); + +#include <sys/param.h> +#include <dev/videomode/videomode.h> +#include "opt_videomode.h" + +#ifdef PICKMODE_DEBUG +#define DPRINTF printf +#else +#define DPRINTF while (0) printf +#endif + +const struct videomode * +pick_mode_by_dotclock(int width, int height, int dotclock) +{ + const struct videomode *this, *best = NULL; + int i; + + DPRINTF("%s: looking for %d x %d at up to %d kHz\n", __func__, width, + height, dotclock); + for (i = 0; i < videomode_count; i++) { + + this = &videomode_list[i]; + if ((this->hdisplay != width) || (this->vdisplay != height) || + (this->dot_clock > dotclock)) + continue; + if (best != NULL) { + + if (this->dot_clock > best->dot_clock) + best = this; + } else + best = this; + } + if (best!= NULL) + DPRINTF("found %s\n", best->name); + + return best; +} + +const struct videomode * +pick_mode_by_ref(int width, int height, int refresh) +{ + const struct videomode *this, *best = NULL; + int mref, closest = 1000, i, diff; + + DPRINTF("%s: looking for %d x %d at up to %d Hz\n", __func__, width, + height, refresh); + for (i = 0; i < videomode_count; i++) { + + this = &videomode_list[i]; + mref = this->dot_clock * 1000 / (this->htotal * this->vtotal); + diff = abs(mref - refresh); + if ((this->hdisplay != width) || (this->vdisplay != height) || + (diff > closest)) + continue; + if (best != NULL) { + + if (diff < closest) { + + best = this; + closest = diff; + } + } else + best = this; + } + if (best!= NULL) + DPRINTF("found %s\n", best->name); + + return best; +} diff --git a/sys/dev/videomode/videomode.h b/sys/dev/videomode/videomode.h index 1e077eb6431..841112e5273 100644 --- a/sys/dev/videomode/videomode.h +++ b/sys/dev/videomode/videomode.h @@ -1,4 +1,4 @@ -/* $NetBSD: videomode.h,v 1.1 2006/03/04 02:34:27 gdamore Exp $ */ +/* $NetBSD: videomode.h,v 1.2 2010/05/04 21:17:10 macallan Exp $ */ /* * Copyright (c) 2001, 2002 Bang Jun-Young @@ -66,4 +66,7 @@ struct videomode { extern const struct videomode videomode_list[]; extern const int videomode_count; +const struct videomode *pick_mode_by_dotclock(int, int, int); +const struct videomode *pick_mode_by_ref(int, int, int); + #endif /* _DEV_VIDEOMODE_H */ |
