linux-kernel - [PATCH] [resend] savagefb: fix DDC for Savage 4

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <201008312009.18904.linux@rainbow-software.org>
Date:	Tue, 31 Aug 2010 20:09:17 +0200
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Antonino Daplas <adaplas@...il.com>
Cc:	linux-fbdev@...r.kernel.org,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: [PATCH] [resend] savagefb: fix DDC for Savage 4

Hello,

I tested savagefb on 3 different Savage 4 cards:
Diamond Stealth III S520
Number Nine SR9
Datapath Horizon 2S (two savage chips on a PCI card)

it worked except the DDC which did not work on any of them.

Looking at the BIOS code, it does not use MMIO register 0xff20 but CRT
register 0xa0 or 0xb1 - depending on the chip revision and something in
register 0xa6. With this patch, DDC works fine on all 3 cards (even on the
second head of Horizon 2S - although it does not display anything as it's
misconfigured because of missing BIOS).

Signed-off-by: Ondrej Zary <linux@...nbow-software.org>

--- linux-2.6.35-rc2/drivers/video/savage/savagefb-i2c.c	2010-06-06 05:43:24.000000000 +0200
+++ linux-2.6.35-rc3/drivers/video/savage/savagefb-i2c.c	2010-08-28 23:54:10.000000000 +0200
@@ -181,6 +181,15 @@
 		par->chan.algo.getscl = prosavage_gpio_getscl;
 		break;
 	case FB_ACCEL_SAVAGE4:
+		par->chan.reg = CR_SERIAL1;
+		if (par->pcidev->revision > 1 && !(VGArCR(0xa6, par) & 0x40))
+			par->chan.reg = CR_SERIAL2;
+		par->chan.ioaddr      = par->mmio.vbase;
+		par->chan.algo.setsda = prosavage_gpio_setsda;
+		par->chan.algo.setscl = prosavage_gpio_setscl;
+		par->chan.algo.getsda = prosavage_gpio_getsda;
+		par->chan.algo.getscl = prosavage_gpio_getscl;
+		break;
 	case FB_ACCEL_SAVAGE2000:
 		par->chan.reg         = 0xff20;
 		par->chan.ioaddr      = par->mmio.vbase;


-- 
Ondrej Zary
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/