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# SPDX-License-Identifier: MIT config DRM_DP_AUX_BUS tristate depends on DRM depends on OF || COMPILE_TEST config DRM_DISPLAY_HELPER tristate depends on DRM help DRM helpers for display adapters. config DRM_DISPLAY_DP_HELPER bool depends on DRM_DISPLAY_HELPER help DRM display helpers for DisplayPort. config DRM_DISPLAY_HDCP_HELPER bool depends on DRM_DISPLAY_HELPER help DRM display helpers for HDCP. config DRM_DISPLAY_HDMI_HELPER bool depends on DRM_DISPLAY_HELPER help DRM display helpers for HDMI. config DRM_DP_AUX_CHARDEV bool "DRM DP AUX Interface" depends on DRM && DRM_DISPLAY_HELPER select DRM_DISPLAY_DP_HELPER help Choose this option to enable a /dev/drm_dp_auxN node that allows to read and write values to arbitrary DPCD registers on the DP aux channel. config DRM_DP_CEC bool "Enable DisplayPort CEC-Tunneling-over-AUX HDMI support" depends on DRM && DRM_DISPLAY_HELPER select DRM_DISPLAY_DP_HELPER select CEC_CORE help Choose this option if you want to enable HDMI CEC support for DisplayPort/USB-C to HDMI adapters. Note: not all adapters support this feature, and even for those that do support this they often do not hook up the CEC pin.