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FAILED: patch "[PATCH] drm/i915: Clear the repeater bit on HDCP disable" failed to apply to 5.8-stable tree

PATCH [email protected] 1 participant 1 message Sep 8, 2020

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Stable branch DRM drivers Intel i915 Intel DRM display for xe and i915 drivers
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The patch below does not apply to the 5.8-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 57537b4e1d37002ed8cbd0a9be082104749e9d8f Mon Sep 17 00:00:00 2001
From: Sean Paul <[email protected]>
Date: Tue, 18 Aug 2020 11:38:50 -0400
Subject: [PATCH] drm/i915: Clear the repeater bit on HDCP disable

On HDCP disable, clear the repeater bit. This ensures if we connect a non-repeater sink after a repeater, the bit is in the state we expect.

Fixes ee5e5e7a5e0f ("drm/i915: Add HDCP framework + base implementation")
Cc Chris Wilson <[email protected]>
Cc Ramalingam C <[email protected]>
Cc Daniel Vetter <[email protected]>
Cc Sean Paul <[email protected]>
Cc Jani Nikula <[email protected]>
Cc Joonas Lahtinen <[email protected]>
Cc Rodrigo Vivi <[email protected]>
Cc [email protected]
Cc <[email protected]> # v4.17+
Reviewed-by Ramalingam C <[email protected]>
Signed-off-by Sean Paul <[email protected]>
Signed-off-by Ramalingam C <[email protected]>
Link https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 2cc0c7b520bf8ea20ec42285d4e3d37b467eb7f9)
Signed-off-by Jani Nikula <[email protected]>
drivers/gpu/drm/i915/display/intel_hdcp.c +6 -0
index 6189b7583277..1a0d49af2a08 100644
@@ -795,6 +795,7 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
 	struct intel_hdcp *hdcp = &connector->hdcp;
 	enum port port = dig_port->base.port;
 	enum transcoder cpu_transcoder = hdcp->cpu_transcoder;
+	u32 repeater_ctl;
 	int ret;
 
 	drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being disabled...\n",

@@ -810,6 +811,11 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
 		return -ETIMEDOUT;
 	}
 
+	repeater_ctl = intel_hdcp_get_repeater_ctl(dev_priv, cpu_transcoder,
+						   port);
+	intel_de_write(dev_priv, HDCP_REP_CTL,
+		       intel_de_read(dev_priv, HDCP_REP_CTL) & ~repeater_ctl);
+
 	ret = hdcp->shim->toggle_signalling(dig_port, false);
 	if (ret) {
 		drm_err(&dev_priv->drm, "Failed to disable HDCP signalling\n");