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drmmode: Only treat a backlight as connected if it has a non-zero max 

Optimistically might help
https://bugs.freedesktop.org/show_bug.cgi?id=29273

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-07-28 13:41:41 +01:00
parent 938ef4eaec
commit b68d4fcab5
1 changed files with 7 additions and 5 deletions
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12
src/drmmode_display.c
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@ -91,7 +91,7 @@ typedef struct {
drmmode_prop_ptr props;
void *private_data;
int dpms_mode;
char *backlight_iface;
const char *backlight_iface;
int backlight_active_level;
int backlight_max;
xf86OutputPtr output;
@ -106,7 +106,7 @@ drmmode_output_dpms(xf86OutputPtr output, int mode);
/*
* List of available kernel interfaces in priority order
*/
static char *backlight_interfaces[] = {
static const char *backlight_interfaces[] = {
"asus-laptop",
"eeepc",
"thinkpad_screen",
@ -240,11 +240,13 @@ drmmode_backlight_init(xf86OutputPtr output)
sprintf(path, "%s/%s", BACKLIGHT_CLASS, backlight_interfaces[i]);
if (!stat(path, &buf)) {
drmmode_output->backlight_iface = backlight_interfaces[i];
xf86DrvMsg(output->scrn->scrnIndex, X_INFO,
"found backlight control interface %s\n", path);
drmmode_output->backlight_max = drmmode_backlight_get_max(output);
drmmode_output->backlight_active_level = drmmode_backlight_get(output);
return;
if (drmmode_backlight_get_max(output)) {
xf86DrvMsg(output->scrn->scrnIndex, X_INFO,
"found backlight control interface %s\n", path);
return;
}
}
}
drmmode_output->backlight_iface = NULL;