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Extended wake timeout request helps to give additional time by reading the DPCD register through which sink requests the minimal amount of time required to wake the sink up. Source device shall keep retying the AUX tansaction till the extended timeout that is being granted for LTTPRs from the sink device. --v2 -Add documentation [Dmitry] Spec: DP v2.1 Section 3.6.12.3 Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20250122053358.1545039-3-suraj.kandpal@intel.com