From: Thomas Reim reimth@gmail.com
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 --- drivers/gpu/drm/radeon/radeon_connectors.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index 2e70be2..82dacc6 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -449,6 +449,15 @@ 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;