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[35.245.46.29]) by smtp.gmail.com with UTF8SMTPSA id ga15-20020a05622a590f00b003b6325dfc4esm4613264qtb.67.2023.01.18.11.30.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Jan 2023 11:30:43 -0800 (PST) From: Mark Yacoub X-Google-Original-From: Mark Yacoub To: quic_khsieh@quicinc.com, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org Date: Wed, 18 Jan 2023 19:30:11 +0000 Message-Id: <20230118193015.911074-7-markyacoub@google.com> X-Mailer: git-send-email 2.39.0.246.g2a6d74b583-goog In-Reply-To: <20230118193015.911074-1-markyacoub@google.com> References: <20230118193015.911074-1-markyacoub@google.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v6 06/10] drm/i915/hdcp: Retain hdcp_capable return codes X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: quic_sbillaka@quicinc.com, konrad.dybcio@somainline.org, bjorn.andersson@linaro.org, krzysztof.kozlowski+dt@linaro.org, airlied@gmail.com, hbh25y@gmail.com, marex@denx.de, abhinavk@codeaurora.org, javierm@redhat.com, agross@kernel.org, quic_jesszhan@quicinc.com, daniel@ffwll.ch, Jani Nikula , lucas.demarchi@intel.com, quic_abhinavk@quicinc.com, swboyd@chromium.org, robh+dt@kernel.org, christophe.jaillet@wanadoo.fr, maxime@cerno.tech, rodrigo.vivi@intel.com, johan+linaro@kernel.org, markyacoub@chromium.org, andersson@kernel.org, dianders@chromium.org, tzimmermann@suse.de, dmitry.baryshkov@linaro.org, seanpaul@chromium.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Sean Paul 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 Reviewed-by: Rodrigo Vivi Signed-off-by: Sean Paul Signed-off-by: Mark Yacoub 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 Link: https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-7-sean@poorly.run #v5 Changes in v2: -None Changes in v3: -None Changes in v4: -None Changes in v5: -None Changes in v6: -Rebased --- .../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 7c7253a2541c..13a4153bb76e 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -492,6 +492,7 @@ 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) { @@ -499,8 +500,12 @@ 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 0a20bc41be55..61a862ae1f28 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -177,50 +177,49 @@ 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->display.hdcp.comp_mutex); if (!dev_priv->display.hdcp.comp_added || !dev_priv->display.hdcp.master) { mutex_unlock(&dev_priv->display.hdcp.comp_mutex); - return false; + return 0; } mutex_unlock(&dev_priv->display.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, @@ -2355,6 +2354,7 @@ 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) @@ -2373,21 +2373,27 @@ 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, @@ -2395,7 +2401,6 @@ 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);