linux-kernel - [PATCH v6 05/10] drm/i915/hdcp: Consolidate HDCP setup/state cache

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Message-Id: <20230118193015.911074-6-markyacoub@google.com>
Date:   Wed, 18 Jan 2023 19:30:10 +0000
From:   Mark Yacoub <markyacoub@...omium.org>
To:     quic_khsieh@...cinc.com, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        intel-gfx@...ts.freedesktop.org
Cc:     robdclark@...il.com, quic_abhinavk@...cinc.com,
        dmitry.baryshkov@...aro.org, sean@...rly.run, airlied@...il.com,
        daniel@...ll.ch, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, agross@...nel.org,
        andersson@...nel.org, konrad.dybcio@...ainline.org,
        jani.nikula@...ux.intel.com, joonas.lahtinen@...ux.intel.com,
        rodrigo.vivi@...el.com, tvrtko.ursulin@...ux.intel.com,
        markyacoub@...omium.org, tzimmermann@...e.de,
        ville.syrjala@...ux.intel.com, stanislav.lisovskiy@...el.com,
        matthew.d.roper@...el.com, imre.deak@...el.com,
        lucas.demarchi@...el.com, manasi.d.navare@...el.com,
        swati2.sharma@...el.com, bhanuprakash.modem@...el.com,
        javierm@...hat.com, jose.souza@...el.com, lyude@...hat.com,
        hbh25y@...il.com, arun.r.murthy@...el.com,
        ashutosh.dixit@...el.com, ankit.k.nautiyal@...el.com,
        maxime@...no.tech, swboyd@...omium.org,
        christophe.jaillet@...adoo.fr, quic_sbillaka@...cinc.com,
        johan+linaro@...nel.org, dianders@...omium.org, marex@...x.de,
        quic_jesszhan@...cinc.com, bjorn.andersson@...aro.org,
        abhinavk@...eaurora.org, seanpaul@...omium.org,
        Jani Nikula <jani.nikula@...el.com>
Subject: [PATCH v6 05/10] drm/i915/hdcp: Consolidate HDCP setup/state cache

From: Sean Paul <seanpaul@...omium.org>

Stick all of the setup for HDCP into a dedicated function. No functional
change, but this will facilitate moving HDCP logic into helpers.

Acked-by: Jani Nikula <jani.nikula@...el.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-6-sean@poorly.run #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-6-sean@poorly.run #v2
Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-6-sean@poorly.run #v3
Link: https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-6-sean@poorly.run #v4
Link: https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-6-sean@poorly.run #v5

Changes in v2:
-None
Changes in v3:
-None
Changes in v4:
-None
Changes in v5:
-None
Changes in v6:
-None

---
 drivers/gpu/drm/i915/display/intel_hdcp.c | 52 +++++++++++++++--------
 1 file changed, 35 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 396d2cef000a..0a20bc41be55 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -2190,6 +2190,37 @@ static enum mei_fw_tc intel_get_mei_fw_tc(enum transcoder cpu_transcoder)
 	}
 }
 
+static int
+_intel_hdcp_setup(struct intel_connector *connector,
+		  const struct intel_crtc_state *pipe_config, u8 content_type)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
+	struct intel_hdcp *hdcp = &connector->hdcp;
+	int ret = 0;
+
+	if (!connector->encoder) {
+		drm_err(&dev_priv->drm, "[%s:%d] encoder is not initialized\n",
+			connector->base.name, connector->base.base.id);
+		return -ENODEV;
+	}
+
+	hdcp->content_type = content_type;
+
+	if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DP_MST)) {
+		hdcp->cpu_transcoder = pipe_config->mst_master_transcoder;
+		hdcp->stream_transcoder = pipe_config->cpu_transcoder;
+	} else {
+		hdcp->cpu_transcoder = pipe_config->cpu_transcoder;
+		hdcp->stream_transcoder = INVALID_TRANSCODER;
+	}
+
+	if (DISPLAY_VER(dev_priv) >= 12)
+		dig_port->hdcp_port_data.fw_tc = intel_get_mei_fw_tc(hdcp->cpu_transcoder);
+
+	return ret;
+}
+
 static int initialize_hdcp_port_data(struct intel_connector *connector,
 				     struct intel_digital_port *dig_port,
 				     const struct intel_hdcp_shim *shim)
@@ -2329,28 +2360,14 @@ int intel_hdcp_enable(struct intel_connector *connector,
 	if (!hdcp->shim)
 		return -ENOENT;
 
-	if (!connector->encoder) {
-		drm_err(&dev_priv->drm, "[%s:%d] encoder is not initialized\n",
-			connector->base.name, connector->base.base.id);
-		return -ENODEV;
-	}
-
 	mutex_lock(&hdcp->mutex);
 	mutex_lock(&dig_port->hdcp_mutex);
 	drm_WARN_ON(&dev_priv->drm,
 		    hdcp->value == DRM_MODE_CONTENT_PROTECTION_ENABLED);
-	hdcp->content_type = content_type;
-
-	if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DP_MST)) {
-		hdcp->cpu_transcoder = pipe_config->mst_master_transcoder;
-		hdcp->stream_transcoder = pipe_config->cpu_transcoder;
-	} else {
-		hdcp->cpu_transcoder = pipe_config->cpu_transcoder;
-		hdcp->stream_transcoder = INVALID_TRANSCODER;
-	}
 
-	if (DISPLAY_VER(dev_priv) >= 12)
-		dig_port->hdcp_port_data.fw_tc = intel_get_mei_fw_tc(hdcp->cpu_transcoder);
+	ret = _intel_hdcp_setup(connector, pipe_config, content_type);
+	if (ret)
+		goto out;
 
 	/*
 	 * Considering that HDCP2.2 is more secure than HDCP1.4, If the setup
@@ -2378,6 +2395,7 @@ int intel_hdcp_enable(struct intel_connector *connector,
 					true);
 	}
 
+out:
 	mutex_unlock(&dig_port->hdcp_mutex);
 	mutex_unlock(&hdcp->mutex);
 	return ret;
-- 
2.39.0.246.g2a6d74b583-goog