fbdebug: Add initial framebuffer debug tool (#1196)
This commit is contained in:
Daniele Debernardi
Oliver Smith
parent
d7a22e3636
commit
c818f9f054
2 changed files with 185 additions and 0 deletions
25
main/fbdebug/APKBUILD
Normal file
25
main/fbdebug/APKBUILD
Normal 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
160
main/fbdebug/fbdebug.c
Normal 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);
|
||||
}
|
||||
Loading…
Reference in a new issue