From: Thomas Reim Date: Fri, 29 Jul 2011 14:29:00 +0000 (+0000) Subject: drm/radeon: Extended DDC Probing for ECS A740GM-M DVI-D Connector X-Git-Tag: v5.15~24332^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a81b31e9fc98e067b7e7f1244861c97e44268e2d;p=platform%2Fkernel%2Flinux-starfive.git 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: Signed-off-by: Thomas Reim Reviewed-by: Alex Deucher Acked-by: Stephen Michaels Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index 6a0f1befbc15..6d6b5f16bc09 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;