[PATCH v5 06/10] drm/i915/hdcp: Retain hdcp_capable return codes
Sean Paul
sean at poorly.run
Mon Apr 11 20:47:35 UTC 2022
From: Sean Paul <seanpaul at chromium.org>
The shim functions return error codes, but they are discarded in
intel_hdcp.c. This patch plumbs the return codes through so they are
properly handled.
Acked-by: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Sean Paul <seanpaul at chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-7-sean@poorly.run #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-7-sean@poorly.run #v2
Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-7-sean@poorly.run #v3
Link: https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-7-sean@poorly.run #v4
Changes in v2:
-None
Changes in v3:
-None
Changes in v4:
-None
Changes in v5:
-None
---
.../drm/i915/display/intel_display_debugfs.c | 9 +++-
drivers/gpu/drm/i915/display/intel_hdcp.c | 51 ++++++++++---------
drivers/gpu/drm/i915/display/intel_hdcp.h | 4 +-
3 files changed, 37 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 452d773fd4e3..f18b4bec4dd4 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -489,6 +489,7 @@ static void intel_panel_info(struct seq_file *m,
static void intel_hdcp_info(struct seq_file *m,
struct intel_connector *intel_connector)
{
+ int ret;
bool hdcp_cap, hdcp2_cap;
if (!intel_connector->hdcp.shim) {
@@ -496,8 +497,12 @@ static void intel_hdcp_info(struct seq_file *m,
goto out;
}
- hdcp_cap = intel_hdcp_capable(intel_connector);
- hdcp2_cap = intel_hdcp2_capable(intel_connector);
+ ret = intel_hdcp_capable(intel_connector, &hdcp_cap);
+ if (ret)
+ hdcp_cap = false;
+ ret = intel_hdcp2_capable(intel_connector, &hdcp2_cap);
+ if (ret)
+ hdcp2_cap = false;
if (hdcp_cap)
seq_puts(m, "HDCP1.4 ");
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 6bb5a3971ed9..771e94fa8dff 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -154,50 +154,49 @@ int intel_hdcp_read_valid_bksv(struct intel_digital_port *dig_port,
}
/* Is HDCP1.4 capable on Platform and Sink */
-bool intel_hdcp_capable(struct intel_connector *connector)
+int intel_hdcp_capable(struct intel_connector *connector, bool *capable)
{
struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
const struct intel_hdcp_shim *shim = connector->hdcp.shim;
- bool capable = false;
u8 bksv[5];
+ *capable = false;
+
if (!shim)
- return capable;
+ return 0;
- if (shim->hdcp_capable) {
- shim->hdcp_capable(dig_port, &capable);
- } else {
- if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
- capable = true;
- }
+ if (shim->hdcp_capable)
+ return shim->hdcp_capable(dig_port, capable);
+
+ if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
+ *capable = true;
- return capable;
+ return 0;
}
/* Is HDCP2.2 capable on Platform and Sink */
-bool intel_hdcp2_capable(struct intel_connector *connector)
+int intel_hdcp2_capable(struct intel_connector *connector, bool *capable)
{
struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
struct intel_hdcp *hdcp = &connector->hdcp;
- bool capable = false;
+
+ *capable = false;
/* I915 support for HDCP2.2 */
if (!hdcp->hdcp2_supported)
- return false;
+ return 0;
/* MEI interface is solid */
mutex_lock(&dev_priv->hdcp_comp_mutex);
if (!dev_priv->hdcp_comp_added || !dev_priv->hdcp_master) {
mutex_unlock(&dev_priv->hdcp_comp_mutex);
- return false;
+ return 0;
}
mutex_unlock(&dev_priv->hdcp_comp_mutex);
/* Sink's capability for HDCP2.2 */
- hdcp->shim->hdcp_2_2_capable(dig_port, &capable);
-
- return capable;
+ return hdcp->shim->hdcp_2_2_capable(dig_port, capable);
}
static bool intel_hdcp_in_use(struct drm_i915_private *dev_priv,
@@ -2332,6 +2331,7 @@ int intel_hdcp_enable(struct intel_connector *connector,
struct intel_digital_port *dig_port = intel_attached_dig_port(connector);
struct intel_hdcp *hdcp = &connector->hdcp;
unsigned long check_link_interval = DRM_HDCP_CHECK_PERIOD_MS;
+ bool capable;
int ret = -EINVAL;
if (!hdcp->shim)
@@ -2350,21 +2350,27 @@ int intel_hdcp_enable(struct intel_connector *connector,
* Considering that HDCP2.2 is more secure than HDCP1.4, If the setup
* is capable of HDCP2.2, it is preferred to use HDCP2.2.
*/
- if (intel_hdcp2_capable(connector)) {
+ ret = intel_hdcp2_capable(connector, &capable);
+ if (capable) {
ret = _intel_hdcp2_enable(connector);
- if (!ret)
+ if (!ret) {
check_link_interval = DRM_HDCP2_CHECK_PERIOD_MS;
+ goto out;
+ }
}
/*
* When HDCP2.2 fails and Content Type is not Type1, HDCP1.4 will
* be attempted.
*/
- if (ret && intel_hdcp_capable(connector) &&
- hdcp->content_type != DRM_MODE_HDCP_CONTENT_TYPE1) {
+ ret = intel_hdcp_capable(connector, &capable);
+ if (ret)
+ goto out;
+
+ if (capable && hdcp->content_type != DRM_MODE_HDCP_CONTENT_TYPE1)
ret = _intel_hdcp_enable(connector);
- }
+out:
if (!ret) {
schedule_delayed_work(&hdcp->check_work, check_link_interval);
intel_hdcp_update_value(connector,
@@ -2372,7 +2378,6 @@ int intel_hdcp_enable(struct intel_connector *connector,
true);
}
-out:
mutex_unlock(&dig_port->hdcp_mutex);
mutex_unlock(&hdcp->mutex);
return ret;
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.h b/drivers/gpu/drm/i915/display/intel_hdcp.h
index 7c5fd84a7b65..f06f6e5a2b1a 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.h
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.h
@@ -33,8 +33,8 @@ void intel_hdcp_update_pipe(struct intel_atomic_state *state,
const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state);
bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port);
-bool intel_hdcp_capable(struct intel_connector *connector);
-bool intel_hdcp2_capable(struct intel_connector *connector);
+int intel_hdcp_capable(struct intel_connector *connector, bool *capable);
+int intel_hdcp2_capable(struct intel_connector *connector, bool *capable);
void intel_hdcp_component_init(struct drm_i915_private *dev_priv);
void intel_hdcp_component_fini(struct drm_i915_private *dev_priv);
void intel_hdcp_cleanup(struct intel_connector *connector);
--
Sean Paul, Software Engineer, Google / Chromium OS
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