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drm/i915/hdcp: Disable the QSES check for HDCP 1.4 over MST
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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@ -722,16 +722,6 @@ static bool intel_dp_mst_get_qses_status(struct intel_digital_port *dig_port,
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return reply.auth_completed && reply.encryption_enabled;
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return reply.auth_completed && reply.encryption_enabled;
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}
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}
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static
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bool intel_dp_mst_hdcp_check_link(struct intel_digital_port *dig_port,
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struct intel_connector *connector)
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{
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if (!intel_dp_hdcp_check_link(dig_port, connector))
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return false;
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return intel_dp_mst_get_qses_status(dig_port, connector);
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}
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static int
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static int
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intel_dp_mst_hdcp2_stream_encryption(struct intel_connector *connector,
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intel_dp_mst_hdcp2_stream_encryption(struct intel_connector *connector,
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bool enable)
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bool enable)
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@ -805,7 +795,7 @@ static const struct intel_hdcp_shim intel_dp_mst_hdcp_shim = {
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.read_v_prime_part = intel_dp_hdcp_read_v_prime_part,
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.read_v_prime_part = intel_dp_hdcp_read_v_prime_part,
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.toggle_signalling = intel_dp_hdcp_toggle_signalling,
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.toggle_signalling = intel_dp_hdcp_toggle_signalling,
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.stream_encryption = intel_dp_mst_hdcp_stream_encryption,
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.stream_encryption = intel_dp_mst_hdcp_stream_encryption,
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.check_link = intel_dp_mst_hdcp_check_link,
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.check_link = intel_dp_hdcp_check_link,
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.hdcp_capable = intel_dp_hdcp_capable,
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.hdcp_capable = intel_dp_hdcp_capable,
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.write_2_2_msg = intel_dp_hdcp2_write_msg,
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.write_2_2_msg = intel_dp_hdcp2_write_msg,
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.read_2_2_msg = intel_dp_hdcp2_read_msg,
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.read_2_2_msg = intel_dp_hdcp2_read_msg,
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