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authorManuel Lauss <mano@roarinelk.homelinux.net>2006-02-01 03:06:54 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:27 -0800
commit00d340b94f6df17d5dc478521e4ee1cfb30c53ac (patch)
treef4949002dc468931efdc01bd70492251a8524d32
parent06c6f90032e39d33d02ab20f32e3f3cd87f58d28 (diff)
[PATCH] i810fb: Do not probe the third i2c bus by default
Some time before 2.6.15, a third DDC channel was added to i810fb. On systems where these ddc pins are not connected, the probe takes about 10 seconds. Add a boot/module option for i810fb to explicitly probe for the 3rd ddc bus if needed. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/video/i810/i810-i2c.c6
-rw-r--r--drivers/video/i810/i810.h1
-rw-r--r--drivers/video/i810/i810_main.c13
3 files changed, 14 insertions, 6 deletions
diff --git a/drivers/video/i810/i810-i2c.c b/drivers/video/i810/i810-i2c.c
index bd410e06db7..e3c8b5f1ca7 100644
--- a/drivers/video/i810/i810-i2c.c
+++ b/drivers/video/i810/i810-i2c.c
@@ -191,11 +191,11 @@ int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid, int conn)
u8 *edid = NULL;
int i;
- DPRINTK("i810-i2c: Probe DDC%i Bus\n", conn);
- if (conn < 4) {
+ DPRINTK("i810-i2c: Probe DDC%i Bus\n", conn+1);
+ if (conn < par->ddc_num) {
for (i = 0; i < 3; i++) {
/* Do the real work */
- edid = i810_do_probe_i2c_edid(&par->chan[conn-1]);
+ edid = i810_do_probe_i2c_edid(&par->chan[conn]);
if (edid)
break;
}
diff --git a/drivers/video/i810/i810.h b/drivers/video/i810/i810.h
index 6c187d5fe95..579195c2bea 100644
--- a/drivers/video/i810/i810.h
+++ b/drivers/video/i810/i810.h
@@ -280,6 +280,7 @@ struct i810fb_par {
u32 blit_bpp;
u32 ovract;
u32 cur_state;
+ u32 ddc_num;
int mtrr_reg;
u16 bltcntl;
u8 interlace;
diff --git a/drivers/video/i810/i810_main.c b/drivers/video/i810/i810_main.c
index 266d0ab9266..d8467c03b49 100644
--- a/drivers/video/i810/i810_main.c
+++ b/drivers/video/i810/i810_main.c
@@ -149,6 +149,7 @@ static int vyres __devinitdata;
static int sync __devinitdata;
static int extvga __devinitdata;
static int dcolor __devinitdata;
+static int ddc3 __devinitdata = 2;
/*------------------------------------------------------------*/
@@ -1763,6 +1764,8 @@ static void __devinit i810_init_defaults(struct i810fb_par *par,
if (sync)
par->dev_flags |= ALWAYS_SYNC;
+ par->ddc_num = ddc3;
+
if (bpp < 8)
bpp = 8;
@@ -1885,7 +1888,7 @@ static void __devinit i810fb_find_init_mode(struct fb_info *info)
int found = 0;
#ifdef CONFIG_FB_I810_I2C
int i;
- int err;
+ int err = 1;
struct i810fb_par *par = info->par;
#endif
@@ -1895,8 +1898,8 @@ static void __devinit i810fb_find_init_mode(struct fb_info *info)
#ifdef CONFIG_FB_I810_I2C
i810_create_i2c_busses(par);
- for (i = 0; i < 4; i++) {
- err = i810_probe_i2c_connector(info, &par->edid, i+1);
+ for (i = 0; i < par->ddc_num + 1; i++) {
+ err = i810_probe_i2c_connector(info, &par->edid, i);
if (!err)
break;
}
@@ -1983,6 +1986,8 @@ static int __devinit i810fb_setup(char *options)
vsync2 = simple_strtoul(this_opt+7, NULL, 0);
else if (!strncmp(this_opt, "dcolor", 6))
dcolor = 1;
+ else if (!strncmp(this_opt, "ddc3", 4))
+ ddc3 = 3;
else
mode_option = this_opt;
}
@@ -2190,6 +2195,8 @@ MODULE_PARM_DESC(sync, "wait for accel engine to finish drawing"
module_param(dcolor, bool, 0);
MODULE_PARM_DESC(dcolor, "use DirectColor visuals"
" (default = 0 = TrueColor)");
+module_param(ddc3, bool, 0);
+MODULE_PARM_DESC(ddc3, "Probe DDC bus 3 (default = 0 = no)");
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Specify initial video mode");