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

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/video/aty/aty128fb.c
View File

@ -357,6 +357,12 @@ static int default_lcd_on __devinitdata = 1;
static int mtrr = 1;
#endif
#ifdef CONFIG_PMAC_BACKLIGHT
static int backlight __devinitdata = 1;
#else
static int backlight __devinitdata = 0;
#endif
/* PLL constants */
struct aty128_constants {
u32 ref_clk;
@ -1652,6 +1658,9 @@ static int __devinit aty128fb_setup(char *options)
} else if (!strncmp(this_opt, "crt:", 4)) {
default_crt_on = simple_strtoul(this_opt+4, NULL, 0);
continue;
} else if (!strncmp(this_opt, "backlight:", 10)) {
backlight = simple_strtoul(this_opt+10, NULL, 0);
continue;
}
#ifdef CONFIG_MTRR
if(!strncmp(this_opt, "nomtrr", 6)) {
@ -1985,6 +1994,7 @@ static int __devinit aty128_init(struct pci_dev *pdev, const struct pci_device_i
par->lock_blank = 0;
#ifdef CONFIG_FB_ATY128_BACKLIGHT
if (backlight)
aty128_bl_init(par);
#endif

10
drivers/video/aty/atyfb_base.c
View File

@ -308,6 +308,12 @@ static int xclk;
static int comp_sync __devinitdata = -1;
static char *mode;
#ifdef CONFIG_PMAC_BACKLIGHT
static int backlight __devinitdata = 1;
#else
static int backlight __devinitdata = 0;
#endif
#ifdef CONFIG_PPC
static int default_vmode __devinitdata = VMODE_CHOOSE;
static int default_cmode __devinitdata = CMODE_CHOOSE;
@ -2575,7 +2581,7 @@ static int __devinit aty_init(struct fb_info *info)
| (USE_F32KHZ | TRISTATE_MEM_EN), par);
} else
#endif
if (M64_HAS(MOBIL_BUS)) {
if (M64_HAS(MOBIL_BUS) && backlight) {
#ifdef CONFIG_FB_ATY_BACKLIGHT
aty_bl_init (par);
#endif
@ -3757,6 +3763,8 @@ static int __init atyfb_setup(char *options)
xclk = simple_strtoul(this_opt+5, NULL, 0);
else if (!strncmp(this_opt, "comp_sync:", 10))
comp_sync = simple_strtoul(this_opt+10, NULL, 0);
else if (!strncmp(this_opt, "backlight:", 10))
backlight = simple_strtoul(this_opt+10, NULL, 0);
#ifdef CONFIG_PPC
else if (!strncmp(this_opt, "vmode:", 6)) {
unsigned int vmode =

8
drivers/video/aty/radeon_base.c
View File

@ -268,6 +268,11 @@ static int nomtrr = 0;
#endif
static int force_sleep;
static int ignore_devlist;
#ifdef CONFIG_PMAC_BACKLIGHT
static int backlight = 1;
#else
static int backlight = 0;
#endif
/*
* prototypes
@ -2348,6 +2353,7 @@ static int __devinit radeonfb_pci_register (struct pci_dev *pdev,
MTRR_TYPE_WRCOMB, 1);
#endif
if (backlight)
radeonfb_bl_init(rinfo);
printk ("radeonfb (%s): %s\n", pci_name(rinfo->pdev), rinfo->name);
@ -2469,6 +2475,8 @@ static int __init radeonfb_setup (char *options)
force_dfp = 1;
} else if (!strncmp(this_opt, "panel_yres:", 11)) {
panel_yres = simple_strtoul((this_opt+11), NULL, 0);
} 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;

10
drivers/video/nvidia/nvidia.c
View File

@ -83,6 +83,11 @@ static int bpp __devinitdata = 8;
#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;
@ -1311,7 +1316,10 @@ static int __devinit nvidiafb_probe(struct pci_dev *pd,
nvidia_save_vga(par, &par->SavedReg);
pci_set_drvdata(pd, info);
if (backlight)
nvidia_bl_init(par);
if (register_framebuffer(info) < 0) {
printk(KERN_ERR PFX "error registering nVidia framebuffer\n");
goto err_out_iounmap_fb;
@ -1408,6 +1416,8 @@ static int __devinit nvidiafb_setup(char *options)
paneltweak = simple_strtoul(this_opt+11, NULL, 0);
} else if (!strncmp(this_opt, "vram:", 5)) {
vram = simple_strtoul(this_opt+5, NULL, 0);
} 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;

10
drivers/video/riva/fbdev.c
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);
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;