From ced633266bdaa9173dc237b8f25ba87f5356ef35 Mon Sep 17 00:00:00 2001 From: Oliver Barta Date: Sat, 28 Mar 2020 11:41:00 +0100 Subject: drm/i915: HDCP: fix Ri prime check done during link check The check was always succeeding even in case of a mismatch due to the HDCP_STATUS_ENC bit being set. Make sure both bits are actually set. Signed-off-by: Oliver Barta Fixes: 2320175feb74 ("drm/i915: Implement HDCP for HDMI") Reviewed-by: Ramalingam C Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20200328104100.12162-1-oliver.barta@aptiv.com (cherry picked from commit 3ffaf56e912e76cf09c560244c8804f9bebda8b1) Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/i915/display/intel_hdmi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index 39930232b253..821411b93dac 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -1536,7 +1536,8 @@ bool intel_hdmi_hdcp_check_link(struct intel_digital_port *intel_dig_port) intel_de_write(i915, HDCP_RPRIME(i915, cpu_transcoder, port), ri.reg); /* Wait for Ri prime match */ - if (wait_for(intel_de_read(i915, HDCP_STATUS(i915, cpu_transcoder, port)) & + if (wait_for((intel_de_read(i915, HDCP_STATUS(i915, cpu_transcoder, port)) & + (HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC)) == (HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC), 1)) { DRM_ERROR("Ri' mismatch detected, link check failed (%x)\n", intel_de_read(i915, HDCP_STATUS(i915, cpu_transcoder, port))); -- cgit v1.2.3