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

fbdebug: Add options to retrieve the colormap and set the fb mode

Browse source
This commit is contained in:
Daniele Debernardi 2018-11-22 06:14:54 +00:00 committed by Oliver Smith
parent 4468cf9b97
commit e371209b29
No known key found for this signature in database
GPG key ID: 5AE7F5513E0885CB
2 changed files with 103 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
main/fbdebug/APKBUILD
View file

@ -1,7 +1,7 @@
# Contributor: drebrez <drebrez@gmail.com>
# Maintainer: drebrez <drebrez@gmail.com>
pkgname=fbdebug
pkgver=0.2
pkgver=0.3
pkgrel=0
pkgdesc="Framebuffer debugging tool"
url="https://postmarketos.org"
@ -22,4 +22,4 @@ package() {
"${pkgdir}/usr/sbin/fbdebug"
}
sha512sums="d6e581f1de822ecac3a392ecd1a555d559fa28315006a94dbe86be2589137584b558e20abc5ae912e4b00c9d8a35db5139eb514b2c95dd2b2299a3fcd47cda46 fbdebug.c"
sha512sums="c75972faa180567fccabf63723693a3dfe6240f891eee9d580a1bfce2a8858cb746a4cc9704990f90abe94f3759ac47ca5203f1309e525d880a8663235a7e209 fbdebug.c"

105
main/fbdebug/fbdebug.c
View file

@ -27,16 +27,21 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
void usage(char* appname)
{
printf("Usage: %s [-d DEV] [-i] [-p] [-h]\n\
printf("Usage: %s [-d DEV] [-i] [-c length] [-p] [-m mode] [-h]\n\
-d Framebuffer device (default /dev/fb0)\n\
-i Show fixed and variable screen info\n\
-c Show colormap values (length 0-256)\n\
-p Perform the panning of the display\n\
-m Set mode: 0 => Normal\n\
2 => Standby\n\
3 => Suspend\n\
4 => Off\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
// ref: https://elixir.bootlin.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);
@ -58,7 +63,7 @@ void print_fix_screeninfo(struct fb_fix_screeninfo* scr_fix)
void print_var_screeninfo(struct fb_var_screeninfo* scr_var)
{
// ref: http://elixir.free-electrons.com/linux/latest/ident/fb_var_screeninfo
// ref: https://elixir.bootlin.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);
@ -102,17 +107,62 @@ void print_var_screeninfo(struct fb_var_screeninfo* scr_var)
printf("\treserved[3] = %u\n", scr_var->reserved[3]);
}
void print_cmap(struct fb_cmap* scr_cmap)
{
// ref: https://elixir.bootlin.com/linux/latest/ident/fb_cmap
printf("Colormap:\n");
printf("\tstart = %u\n", scr_cmap->start);
printf("\tlen = %u\n", scr_cmap->len);
printf("\tred = ");
for (int i = 0; i < scr_cmap->len; i++) {
if (i > 0 && i % 8 == 0) {
printf("\n\t\t ");
}
printf("0x%04hX ", scr_cmap->red[i]);
}
printf("\n");
printf("\tgreen = ");
for (int i = 0; i < scr_cmap->len; i++) {
if (i > 0 && i % 8 == 0) {
printf("\n\t\t ");
}
printf("0x%04hX ", scr_cmap->green[i]);
}
printf("\n");
printf("\tblue = ");
for (int i = 0; i < scr_cmap->len; i++) {
if (i > 0 && i % 8 == 0) {
printf("\n\t\t ");
}
printf("0x%04hX ", scr_cmap->blue[i]);
}
printf("\n");
printf("\ttransp = ");
for (int i = 0; i < scr_cmap->len; i++) {
if (i > 0 && i % 8 == 0) {
printf("\n\t\t ");
}
printf("0x%04hX ", scr_cmap->transp[i]);
}
printf("\n");
}
int main(int argc, char** argv)
{
const char *fb_device;
struct fb_fix_screeninfo scr_fix;
struct fb_var_screeninfo scr_var;
struct fb_cmap scr_cmap;
int fb_fd;
// parse command line options
fb_device = "/dev/fb0";
bool show_info = false;
bool show_cmap = false;
int cmap_len;
bool pan_display = false;
bool set_fbmode = false;
int fbmode;
if (argc < 2)
{
@ -120,7 +170,7 @@ int main(int argc, char** argv)
exit(1);
}
int opt;
while ((opt = getopt(argc, argv, "d:iph")) != -1)
while ((opt = getopt(argc, argv, "d:ic:pm:h")) != -1)
{
switch (opt)
{
@ -130,9 +180,17 @@ int main(int argc, char** argv)
case 'i':
show_info = true;
break;
case 'c':
show_cmap = true;
cmap_len = atoi(optarg);
break;
case 'p':
pan_display = true;
break;
case 'm':
set_fbmode = true;
fbmode = atoi(optarg);
break;
case 'h':
default:
usage(argv[0]);
@ -174,6 +232,35 @@ int main(int argc, char** argv)
if (show_info)
print_var_screeninfo(&scr_var);
// call ioctl. retrieve colormap
if (show_cmap) {
scr_cmap.start = 0;
scr_cmap.len = cmap_len;
scr_cmap.red = calloc(256, sizeof(unsigned short));
scr_cmap.green = calloc(256, sizeof(unsigned short));
scr_cmap.blue = calloc(256, sizeof(unsigned short));
scr_cmap.transp = calloc(256, sizeof(unsigned short));
if (ioctl(fb_fd, FBIOGETCMAP, &scr_cmap) < 0)
{
printf("Unable to retrieve cmap info: %s\n",
strerror(errno));
free(scr_cmap.red);
free(scr_cmap.green);
free(scr_cmap.blue);
free(scr_cmap.transp);
close(fb_fd);
return 1;
}
// print all the cmap values
print_cmap(&scr_cmap);
free(scr_cmap.red);
free(scr_cmap.green);
free(scr_cmap.blue);
free(scr_cmap.transp);
}
if (pan_display)
{
// call ioctl. pan the display
@ -186,6 +273,16 @@ int main(int argc, char** argv)
}
}
if (set_fbmode) {
if (ioctl(fb_fd, FBIOBLANK, (void *)fbmode) < 0)
{
printf("Unable to set fb mode: %s\n",
strerror(errno));
close(fb_fd);
return 1;
}
}
// close the framebuffer device
close(fb_fd);
}