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    Subject[PATCH] drm/radeon: Fix ECS A740GM-M DVI-D EDID error flooding problem
    Date
    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: Fix Asus M2A-VM HDMI EDID error flooding problem

    BugLink: http://bugs.launchpad.net/bugs/810926

    Signed-off-by: Thomas Reim <reimth@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;
    --
    1.7.1


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