On Mon, Apr 11, 2022 at 08:47:35PM +0000, Sean Paul wrote: > From: Sean Paul <seanpaul@xxxxxxxxxxxx> > > 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. Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > > Acked-by: Jani Nikula <jani.nikula@xxxxxxxxx> > Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx> > Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-7-sean@xxxxxxxxxx #v1 > Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-7-sean@xxxxxxxxxx #v2 > Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-7-sean@xxxxxxxxxx #v3 > Link: https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-7-sean@xxxxxxxxxx #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 >
