From a81b31e9fc98e067b7e7f1244861c97e44268e2d Mon Sep 17 00:00:00 2001
From: Thomas Reim <reimth@gmail.com>
Date: Fri, 29 Jul 2011 14:29:00 +0000
Subject: [PATCH] drm/radeon: Extended DDC Probing for ECS A740GM-M DVI-D
Connector
ECS A740GM-M with ATI RADEON 2100 sends data to i2c bus
for a DVI connector that is not implemented/existent on the board.
Fix by applying extented DDC probing for this connector.
Requires [PATCH] drm/radeon: Extended DDC Probing for Connectors
with Improperly Wired DDC Lines
Tested for kernel 2.6.38 on Asus ECS A740GM-M board
BugLink: http://bugs.launchpad.net/bugs/810926
Cc: <stable@kernel.org>
Signed-off-by: Thomas Reim <reimth@gmail.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Acked-by: Stephen Michaels <Stephen.Micheals@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/radeon/radeon_connectors.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 6a0f1befbc15b..6d6b5f16bc094 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -455,6 +455,15 @@ static bool radeon_connector_needs_extended_probe(struct radeon_device *dev,
(supported_device == ATOM_DEVICE_DFP2_SUPPORT))
return true;
}
+ /* ECS A740GM-M with ATI RADEON 2100 sends data to i2c bus
+ * for a DVI connector that is not implemented */
+ if ((dev->pdev->device == 0x796e) &&
+ (dev->pdev->subsystem_vendor == 0x1019) &&
+ (dev->pdev->subsystem_device == 0x2615)) {
+ if ((connector_type == DRM_MODE_CONNECTOR_DVID) &&
+ (supported_device == ATOM_DEVICE_DFP2_SUPPORT))
+ return true;
+ }
/* Default: no EDID header probe required for DDC probing */
return false;
--
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