forge/pmaports
1
0
Fork 0
Code Issues 2 Pull requests Projects Releases Packages Wiki Activity Actions

fbdebug: Add initial framebuffer debug tool (#1196)

Browse source
This commit is contained in:
Daniele Debernardi 2018-02-03 20:09:59 +01:00 committed by Oliver Smith
parent d7a22e3636
commit c818f9f054
2 changed files with 185 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
main/fbdebug/APKBUILD Normal file
View file

@ -0,0 +1,25 @@
# Contributor: drebrez <drebrez@gmail.com>
# Maintainer: drebrez <drebrez@gmail.com>
pkgname=fbdebug
pkgver=0.1
pkgrel=0
pkgdesc="Framebuffer debugging tool"
url="https://github.com/postmarketOS"
arch="all"
license="GPL2"
makedepends="linux-headers"
source="fbdebug.c"
options="!check"
builddir="$srcdir/"
build() {
gcc fbdebug.c -o fbdebug.o -c
gcc fbdebug.o -o fbdebug
}
package() {
install -Dm755 "${builddir}/fbdebug" \
"${pkgdir}/usr/sbin/fbdebug"
}
sha512sums="adaad7542ccac8d10eac5761933c24de654ae169ea1d64649a8b728b4ecac987c77ca4f77d64a43e260c0042b207482936102ba55d9c528331eabefc746f3bae fbdebug.c"

160
main/fbdebug/fbdebug.c Normal file
View file

@ -0,0 +1,160 @@
/*
Copyright (C) 2018 drebrez <drebrez@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <linux/fb.h>
#include <sys/ioctl.h>
void usage(char* appname)
{
printf("Usage: %s [-d DEV] [-h]\n\
-d Framebuffer device (default /dev/fb0)\n\
-h Show this help\n", appname);
}
void print_fix_screeninfo(struct fb_fix_screeninfo* scr_fix)
{
// ref: http://elixir.free-electrons.com/linux/latest/ident/fb_fix_screeninfo
printf("Fixed screen info:\n");
printf("\tid = %s\n", scr_fix->id);
printf("\tsmem_start = %lu\n", scr_fix->smem_start);
printf("\tsmem_len = %u\n", scr_fix->smem_len);
printf("\ttype = %u\n", scr_fix->type);
printf("\ttype_aux = %u\n", scr_fix->type_aux);
printf("\tvisual = %u\n", scr_fix->visual);
printf("\txpanstep = %hu\n", scr_fix->xpanstep);
printf("\typanstep = %hu\n", scr_fix->ypanstep);
printf("\tywrapstep = %hu\n", scr_fix->ywrapstep);
printf("\tline_length = %u\n", scr_fix->line_length);
printf("\tmmio_start = %lu\n", scr_fix->mmio_start);
printf("\tmmio_len = %u\n", scr_fix->mmio_len);
printf("\taccel = %u\n", scr_fix->accel);
printf("\tcapabilities = %hu\n", scr_fix->capabilities);
printf("\treserved[0] = %hu\n", scr_fix->reserved[0]);
printf("\treserved[1] = %hu\n", scr_fix->reserved[1]);
}
void print_var_screeninfo(struct fb_var_screeninfo* scr_var)
{
// ref: http://elixir.free-electrons.com/linux/latest/ident/fb_var_screeninfo
printf("Variable screen info:\n");
printf("\txres = %u\n", scr_var->xres);
printf("\tyres = %u\n", scr_var->yres);
printf("\txres_virtual = %u\n", scr_var->xres_virtual);
printf("\tyres_virtual = %u\n", scr_var->yres_virtual);
printf("\txoffset = %u\n", scr_var->xoffset);
printf("\tyoffset = %u\n", scr_var->yoffset);
printf("\tbits_per_pixel = %u\n", scr_var->bits_per_pixel);
printf("\tgrayscale = %u\n", scr_var->grayscale);
printf("\tred.offset = %u\n", scr_var->red.offset);
printf("\tred.length = %u\n", scr_var->red.length);
printf("\tred.msb_right = %u\n", scr_var->red.msb_right);
printf("\tgreen.offset = %u\n", scr_var->green.offset);
printf("\tgreen.length = %u\n", scr_var->green.length);
printf("\tgreen.msb_right = %u\n", scr_var->green.msb_right);
printf("\tblue.offset = %u\n", scr_var->blue.offset);
printf("\tblue.length = %u\n", scr_var->blue.length);
printf("\tblue.msb_right = %u\n", scr_var->blue.msb_right);
printf("\ttransp.offset = %u\n", scr_var->transp.offset);
printf("\ttransp.length = %u\n", scr_var->transp.length);
printf("\ttransp.msb_right = %u\n", scr_var->transp.msb_right);
printf("\tnonstd = %u\n", scr_var->nonstd);
printf("\tactivate = %u\n", scr_var->activate);
printf("\theight = %u\n", scr_var->height);
printf("\twidth = %u\n", scr_var->width);
printf("\taccel_flags = %u\n", scr_var->accel_flags);
printf("\tpixclock = %u\n", scr_var->pixclock);
printf("\tleft_margin = %u\n", scr_var->left_margin);
printf("\tright_margin = %u\n", scr_var->right_margin);
printf("\tupper_margin = %u\n", scr_var->upper_margin);
printf("\tlower_margin = %u\n", scr_var->lower_margin);
printf("\thsync_len = %u\n", scr_var->hsync_len);
printf("\tvsync_len = %u\n", scr_var->vsync_len);
printf("\tsync = %u\n", scr_var->sync);
printf("\tvmode = %u\n", scr_var->vmode);
printf("\trotate = %u\n", scr_var->rotate);
printf("\tcolorspace = %u\n", scr_var->colorspace);
printf("\treserved[0] = %u\n", scr_var->reserved[0]);
printf("\treserved[1] = %u\n", scr_var->reserved[1]);
printf("\treserved[2] = %u\n", scr_var->reserved[2]);
printf("\treserved[3] = %u\n", scr_var->reserved[3]);
}
int main(int argc, char** argv)
{
const char *fb_device;
struct fb_fix_screeninfo scr_fix;
struct fb_var_screeninfo scr_var;
int fb_fd;
// parse command line options
fb_device = "/dev/fb0";
int opt;
while ((opt = getopt(argc, argv, "d:h")) != -1)
{
switch (opt)
{
case 'd':
fb_device = optarg;
break;
case 'h':
default:
usage(argv[0]);
exit(1);
}
}
// open the framebuffer device
fb_fd = open(fb_device, O_RDWR);
if (fb_fd < 0)
{
printf("Unable to open %s.\n", fb_device);
return 1;
}
// call ioctl. retrieve fixed screen info
if (ioctl(fb_fd, FBIOGET_FSCREENINFO, &scr_fix) < 0)
{
printf("Unable to retrieve fixed screen info: %s\n",
strerror(errno));
close(fb_fd);
return 1;
}
// print all the fixed screen info values
print_fix_screeninfo(&scr_fix);
// call ioctl. retrieve variable screen info
if (ioctl(fb_fd, FBIOGET_VSCREENINFO, &scr_var) < 0)
{
printf("Unable to retrieve variable screen info: %s\n",
strerror(errno));
close(fb_fd);
return 1;
}
// print all the variable screen info values
print_var_screeninfo(&scr_var);
// close the framebuffer device
close(fb_fd);
}