[PATCH] nvidiafb: Fallback to firmware EDID
If nvidiafb fails to probe the EDID block, get the EDID from the BIOS.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/video/nvidia/nv_i2c.c b/drivers/video/nvidia/nv_i2c.c
index 1a91bff..ace484f 100644
--- a/drivers/video/nvidia/nv_i2c.c
+++ b/drivers/video/nvidia/nv_i2c.c
@@ -194,8 +194,9 @@
return NULL;
}
-int nvidia_probe_i2c_connector(struct nvidia_par *par, int conn, u8 **out_edid)
+int nvidia_probe_i2c_connector(struct fb_info *info, int conn, u8 **out_edid)
{
+ struct nvidia_par *par = info->par;
u8 *edid = NULL;
int i;
@@ -205,10 +206,17 @@
if (edid)
break;
}
+
+ if (!edid && conn == 1) {
+ /* try to get from firmware */
+ edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
+ if (edid)
+ memcpy(edid, fb_firmware_edid(info->device),
+ EDID_LENGTH);
+ }
+
if (out_edid)
*out_edid = edid;
- if (!edid)
- return 1;
- return 0;
+ return (edid) ? 0 : 1;
}
diff --git a/drivers/video/nvidia/nv_proto.h b/drivers/video/nvidia/nv_proto.h
index 42847ce..cac44fc 100644
--- a/drivers/video/nvidia/nv_proto.h
+++ b/drivers/video/nvidia/nv_proto.h
@@ -34,7 +34,7 @@
#if defined(CONFIG_FB_NVIDIA_I2C) || defined (CONFIG_PPC_OF)
void nvidia_create_i2c_busses(struct nvidia_par *par);
void nvidia_delete_i2c_busses(struct nvidia_par *par);
-int nvidia_probe_i2c_connector(struct nvidia_par *par, int conn,
+int nvidia_probe_i2c_connector(struct fb_info *info, int conn,
u8 ** out_edid);
#else
#define nvidia_create_i2c_busses(...)
diff --git a/drivers/video/nvidia/nv_setup.c b/drivers/video/nvidia/nv_setup.c
index 0bbdca2..11c8417 100644
--- a/drivers/video/nvidia/nv_setup.c
+++ b/drivers/video/nvidia/nv_setup.c
@@ -401,7 +401,7 @@
nvidia_create_i2c_busses(par);
if (!par->twoHeads) {
par->CRTCnumber = 0;
- nvidia_probe_i2c_connector(par, 1, &edidA);
+ nvidia_probe_i2c_connector(info, 1, &edidA);
if (edidA && !fb_parse_edid(edidA, &var)) {
printk("nvidiafb: EDID found from BUS1\n");
monA = &monitorA;
@@ -488,14 +488,14 @@
oldhead = NV_RD32(par->PCRTC0, 0x00000860);
NV_WR32(par->PCRTC0, 0x00000860, oldhead | 0x00000010);
- nvidia_probe_i2c_connector(par, 1, &edidA);
+ nvidia_probe_i2c_connector(info, 1, &edidA);
if (edidA && !fb_parse_edid(edidA, &var)) {
printk("nvidiafb: EDID found from BUS1\n");
monA = &monitorA;
fb_edid_to_monspecs(edidA, monA);
}
- nvidia_probe_i2c_connector(par, 2, &edidB);
+ nvidia_probe_i2c_connector(info, 2, &edidB);
if (edidB && !fb_parse_edid(edidB, &var)) {
printk("nvidiafb: EDID found from BUS2\n");
monB = &monitorB;