Attachment 64395 Details for Bug 52266 – possible fix

[patch] possible fix

0001-drm-radeon-add-DVI-D-DDC-quirk-for-Asus-Xpress200.patch (text/plain), 1.59 KB, created by Alex Deucher on 2012-07-19 14:27:39 UTC

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Creator: Alex Deucher

Created: 2012-07-19 14:27:39 UTC

Size: 1.59 KB

patch

obsolete

>From f07fdd383df549314f70e3603a90032fd7cdabbc Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Thu, 19 Jul 2012 10:25:16 -0400
>Subject: [PATCH] drm/radeon: add DVI-D DDC quirk for Asus Xpress200
>
>Fixes:
>https://bugs.freedesktop.org/show_bug.cgi?id=52266
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>Cc: stable@vger.kernel.org
>---
> drivers/gpu/drm/radeon/radeon_combios.c |   14 ++++++++++++++
> 1 files changed, 14 insertions(+), 0 deletions(-)
>
>diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
>index 576f4f6..ca5c90c 100644
>--- a/drivers/gpu/drm/radeon/radeon_combios.c
>+++ b/drivers/gpu/drm/radeon/radeon_combios.c
>@@ -2218,6 +2218,7 @@ static bool radeon_apply_legacy_quirks(struct drm_device *dev,
> 				       struct radeon_i2c_bus_rec *ddc_i2c,
> 				       struct radeon_hpd *hpd)
> {
>+	struct radeon_device *rdev = dev->dev_private;
> 
> 	/* Certain IBM chipset RN50s have a BIOS reporting two VGAs,
> 	   one with VGA DDC and one with CRT2 DDC. - kill the CRT2 DDC one */
>@@ -2236,6 +2237,19 @@ static bool radeon_apply_legacy_quirks(struct drm_device *dev,
> 			return false;
> 	}
> 
>+	/* Xpress200 with a missing DDC id for DVI-D port */
>+	if (dev->pdev->device == 0x5a41 &&
>+	    dev->pdev->subsystem_vendor == 0x1043 &&
>+	    dev->pdev->subsystem_device == 0x818c) {
>+		if (*legacy_connector == CONNECTOR_DVI_D_LEGACY &&
>+		    ddc_i2c->valid == false) {
>+			struct radeon_i2c_bus_rec tmp_ddc_i2c =
>+				combios_setup_i2c_bus(rdev, DDC_MONID, 0, 0);
>+			*ddc_i2c = tmp_ddc_i2c;
>+			return true;
>+		}
>+	}
>+
> 	return true;
> }
> 
>-- 
>1.7.7.5
>

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