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The HDCP 1.4 spec does not require the QUERY_STREAM_ENCRYPTION_STATUS check, it was always a nice-to-have. After deploying this across various devices, we've determined that some MST bridge chips do not properly support this call for HDCP 1.4 (namely Synaptics and Realtek). I had considered creating a quirk for this, but I think it's more prudent to just disable the check entirely since I don't have an idea how widespread support is. Changes in v2: -Rebased on -tip Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210106223909.34476-1-sean@poorly.run #v1 Link: https://patchwork.freedesktop.org/patch/msgid/20210121172620.33066-1-sean@poorly.run |
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