video: exynos_dp: adjust voltage swing and pre-emphasis during Link Training
This patch adds adjustement for voltage swing and pre-emphasis during Link Training procedure. According to the DP specification, unless all the LANEx_CR_DONE bits are set, the transmitter must read the ADJUST_REQUEST_LANEx_x, increase the voltage swing according to the request, and update the TRAINING_LANEx_SET bytes to match the new voltage swing setting. Refer to the DP specification v1.1a, Section 3.5.1.3 Link Training. Signed-off-by:Jingoo Han <jg1.han@samsung.com> Signed-off-by:
Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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