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* [Intel-gfx] [PATCH] drm/i915: HDCP: fix Ri prime check done during link check
@ 2020-02-29 10:39 Oliver Barta
  2020-03-02 18:56 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for " Patchwork
                   ` (4 more replies)
  0 siblings, 5 replies; 7+ messages in thread
From: Oliver Barta @ 2020-02-29 10:39 UTC (permalink / raw)
  To: intel-gfx, Jani Nikula, Joonas Lahtinen
  Cc: Daniel Vetter, Ravisankar Madasamy, Sean Paul, Oliver Barta

From: Oliver Barta <oliver.barta@aptiv.com>

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 <oliver.barta@aptiv.com>
Fixes: 2320175feb74 ("drm/i915: Implement HDCP for HDMI")
---
 Submitted before as part of patch series
 https://patchwork.freedesktop.org/series/73961/
 For some reason the versioning got messed up. 
 I marked the patch series as superseded and I'm
 starting all over. Sorry for spamming you.

 drivers/gpu/drm/i915/display/intel_hdmi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 0ac9bdfbc094..ac4276157182 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)));
-- 
2.20.1

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^ permalink raw reply related	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2020-03-05 13:55 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-02-29 10:39 [Intel-gfx] [PATCH] drm/i915: HDCP: fix Ri prime check done during link check Oliver Barta
2020-03-02 18:56 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for " Patchwork
2020-03-02 19:11 ` [Intel-gfx] ✗ Fi.CI.DOCS: " Patchwork
2020-03-02 19:22 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-03-03  8:12 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2020-03-03  9:33 ` [Intel-gfx] [PATCH] " Ramalingam C
2020-03-05  8:14   ` Oliver Barta

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