Re: [PATCH] nvidiafb: allow ignoring EDID info

Il Thu, Feb 22, 2007 at 09:01:52AM +0100, Giuseppe Bilotta ha scritto: 

On 2/22/07, Antonino A. Daplas [off-list ref] wrote:

quoted

On Wed, 2007-02-07 at 00:08 +0100, Giuseppe Bilotta wrote:

quoted

As mentioned in another post in this thread, I can't get any info out
of the i2c busses, because even when I have them available (i.e. after
loading nvidiafb) I get XXXX all around (on all three of them).
Suggestions on how to get the information welcome.

Is this the same monitor you posted here?

http://marc.theaimsgroup.com/?l=linux-kernel&m=112807065616218&w=2

If yes, we already have the manufacturer and model code. The main
problem is that the EDID of this display has no sync range (H: 75-75kHz
and V: 60-60Hz).  Extending Hsync from 30-75kHz as a fix to the EDID
block shouldn't be too hard.

Yes, that's it! Jeepers, I can't believe that even re-reading the past
LKML posts (even those!) I couldn't find the EDID info and how we had
gotten them. I guess I need stronger glasses.

Wonder why Luca's proposed patch makes the EDID undetectable, now, and
why can't it be retrieved at a later time via i2c. Timeouts too small?

Still scratching my head :|

Tony,
this is the patch (modulo cosmetic stuff) that I sent to Giuseppe. I
believe it's correct (I cross checked with X.org driver):

diff --git a/drivers/video/nvidia/nv_i2c.c b/drivers/video/nvidia/nv_i2c.c
index b858897..7e64341 100644
--- a/drivers/video/nvidia/nv_i2c.c
+++ b/drivers/video/nvidia/nv_i2c.c

@@ -70,8 +70,6 @@ static int nvidia_gpio_getscl(void *data)
 	if (VGA_RD08(par->PCIO, 0x3d5) & 0x04)
 		val = 1;
 
-	val = VGA_RD08(par->PCIO, 0x3d5);
-
 	return val;
 }
 

Luca
-- 
Non sempre quello che viene dopo e` progresso.
Alessandro Manzoni

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