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backlight: Allow enable/disable of fb backlights, fixing regressions

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Enabling the backlight by default appears to cause problems for many
users. This patch disables backlight controls unless explicitly
enabled by users via a module parameter. Since PMAC users are known
to work, default to enabled in that case.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
This commit is contained in:
Richard Purdie
2007-03-03 17:43:52 +00:00
parent 238576e12f
commit 202d4e6025
5 changed files with 51 additions and 5 deletions
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drivers/video/riva/fbdev.c
+11 -1
View File
@@ -215,6 +215,11 @@ static int noaccel __devinitdata = 0;
#ifdef CONFIG_MTRR
static int nomtrr __devinitdata = 0;
#endif
#ifdef CONFIG_PMAC_BACKLIGHT
static int backlight __devinitdata = 1;
#else
static int backlight __devinitdata = 0;
#endif
static char *mode_option __devinitdata = NULL;
static int strictmode = 0;
@@ -2059,7 +2064,10 @@ static int __devinit rivafb_probe(struct pci_dev *pd,
info->monspecs.modedb = NULL;
pci_set_drvdata(pd, info);
riva_bl_init(info->par);
if (backlight)
riva_bl_init(info->par);
ret = register_framebuffer(info);
if (ret < 0) {
printk(KERN_ERR PFX
@@ -2157,6 +2165,8 @@ static int __init rivafb_setup(char *options)
forceCRTC = -1;
} else if (!strncmp(this_opt, "flatpanel", 9)) {
flatpanel = 1;
} else if (!strncmp(this_opt, "backlight:", 10)) {
backlight = simple_strtoul(this_opt+10, NULL, 0);
#ifdef CONFIG_MTRR
} else if (!strncmp(this_opt, "nomtrr", 6)) {
nomtrr = 1;