diff mbox series

[v6,02/10] drm/hdcp: Avoid changing crtc state in hdcp atomic check

Message ID 20230118193015.911074-3-markyacoub@google.com (mailing list archive)
State Not Applicable
Headers show
Series drm/hdcp: Pull HDCP auth/exchange/check into helpers | expand

Commit Message

Mark Yacoub Jan. 18, 2023, 7:30 p.m. UTC 
From: Sean Paul <seanpaul@chromium.org>

Instead of forcing a modeset in the hdcp atomic check, simply return
true if the content protection value is changing and let the driver
decide whether a modeset is required or not.

Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Mark Yacoub <markyacoub@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-3-sean@poorly.run #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-3-sean@poorly.run #v2
Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-3-sean@poorly.run #v3
Link: https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-3-sean@poorly.run #v4
Link: https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-3-sean@poorly.run #v5

Changes in v2:
-None
Changes in v3:
-None
Changes in v4:
-None
Changes in v5:
-None
Changes in V6:
-Rebase: modifications in drm_hdcp_helper.c instead of drm_hdcp.c

---
 drivers/gpu/drm/display/drm_hdcp_helper.c   | 33 +++++++++++++++------
 drivers/gpu/drm/i915/display/intel_atomic.c |  6 ++--
 include/drm/display/drm_hdcp_helper.h       |  2 +-
 3 files changed, 27 insertions(+), 14 deletions(-)

Comments

Dmitry Baryshkov Jan. 19, 2023, 11:45 a.m. UTC | #1 
On 18/01/2023 21:30, Mark Yacoub wrote:
> From: Sean Paul <seanpaul@chromium.org>
> 
> Instead of forcing a modeset in the hdcp atomic check, simply return
> true if the content protection value is changing and let the driver
> decide whether a modeset is required or not.

I don't think this is a good idea. All foo_atomic_check functions return 
an error code (or 0 if atomic check passes). Making 
drm_hpcp_atomic_check return bool is against that custom and is a clear 
way to make one forget to notice that. Please rename function to remove 
possible confusion.

> 
> Acked-by: Jani Nikula <jani.nikula@intel.com>
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> Signed-off-by: Mark Yacoub <markyacoub@chromium.org>
> Link: https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-3-sean@poorly.run #v1
> Link: https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-3-sean@poorly.run #v2
> Link: https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-3-sean@poorly.run #v3
> Link: https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-3-sean@poorly.run #v4
> Link: https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-3-sean@poorly.run #v5
> 
> Changes in v2:
> -None
> Changes in v3:
> -None
> Changes in v4:
> -None
> Changes in v5:
> -None
> Changes in V6:
> -Rebase: modifications in drm_hdcp_helper.c instead of drm_hdcp.c
> 
> ---
>   drivers/gpu/drm/display/drm_hdcp_helper.c   | 33 +++++++++++++++------
>   drivers/gpu/drm/i915/display/intel_atomic.c |  6 ++--
>   include/drm/display/drm_hdcp_helper.h       |  2 +-
>   3 files changed, 27 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/display/drm_hdcp_helper.c b/drivers/gpu/drm/display/drm_hdcp_helper.c
> index 7d910523b05f..a3896b0904b5 100644
> --- a/drivers/gpu/drm/display/drm_hdcp_helper.c
> +++ b/drivers/gpu/drm/display/drm_hdcp_helper.c
> @@ -428,11 +428,14 @@ EXPORT_SYMBOL(drm_hdcp_update_content_protection);
>    * @connector: drm_connector on which content protection state needs an update
>    *
>    * This function can be used by display drivers to perform an atomic check on the
> - * hdcp state elements. If hdcp state has changed, this function will set
> - * mode_changed on the crtc driving the connector so it can update its hardware
> - * to match the hdcp state.
> + * hdcp state elements. If hdcp state has changed in a manner which requires the
> + * driver to enable or disable content protection, this function will return
> + * true.
> + *
> + * Returns:
> + * true if the driver must enable/disable hdcp, false otherwise
>    */
> -void drm_hdcp_atomic_check(struct drm_connector *connector,
> +bool drm_hdcp_atomic_check(struct drm_connector *connector,
>   			   struct drm_atomic_state *state)
>   {
>   	struct drm_connector_state *new_conn_state, *old_conn_state;
> @@ -450,10 +453,12 @@ void drm_hdcp_atomic_check(struct drm_connector *connector,
>   		 * If the connector is being disabled with CP enabled, mark it
>   		 * desired so it's re-enabled when the connector is brought back
>   		 */
> -		if (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED)
> +		if (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
>   			new_conn_state->content_protection =
>   				DRM_MODE_CONTENT_PROTECTION_DESIRED;
> -		return;
> +			return true;
> +		}
> +		return false;
>   	}
>   
>   	new_crtc_state =
> @@ -465,9 +470,19 @@ void drm_hdcp_atomic_check(struct drm_connector *connector,
>   	*/
>   	if (drm_atomic_crtc_needs_modeset(new_crtc_state) &&
>   	    (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
> -	     new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
> +	     new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED)) {
>   		new_conn_state->content_protection =
>   			DRM_MODE_CONTENT_PROTECTION_DESIRED;
> +		return true;
> +	}
> +
> +	/*
> +	 * Coming back from disable or changing CRTC with DESIRED state requires
> +	 * that the driver try CP enable.
> +	 */
> +	if (new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
> +	    new_conn_state->crtc != old_conn_state->crtc)
> +		return true;
>   
>   	/*
>   	 * Nothing to do if content type is unchanged and one of:
> @@ -482,9 +497,9 @@ void drm_hdcp_atomic_check(struct drm_connector *connector,
>   	     new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED)) {
>   		if (old_conn_state->hdcp_content_type ==
>   		    new_conn_state->hdcp_content_type)
> -			return;
> +			return false;
>   	}
>   
> -	new_crtc_state->mode_changed = true;
> +	return true;
>   }
>   EXPORT_SYMBOL(drm_hdcp_atomic_check);
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
> index 8a473199c4bf..a2067cbae2d5 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -123,8 +123,6 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
>   		to_intel_digital_connector_state(old_state);
>   	struct drm_crtc_state *crtc_state;
>   
> -	drm_hdcp_atomic_check(conn, state);
> -
>   	if (!new_state->crtc)
>   		return 0;
>   
> @@ -140,8 +138,8 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
>   	    new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
>   	    new_conn_state->base.content_type != old_conn_state->base.content_type ||
>   	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
> -	    new_conn_state->base.privacy_screen_sw_state != old_conn_state->base.privacy_screen_sw_state ||
> -	    !drm_connector_atomic_hdr_metadata_equal(old_state, new_state))
> +	    !drm_connector_atomic_hdr_metadata_equal(old_state, new_state) ||
> +	    drm_hdcp_atomic_check(conn, state))
>   		crtc_state->mode_changed = true;
>   
>   	return 0;
> diff --git a/include/drm/display/drm_hdcp_helper.h b/include/drm/display/drm_hdcp_helper.h
> index dd02b2e72a50..cb2cc5002f65 100644
> --- a/include/drm/display/drm_hdcp_helper.h
> +++ b/include/drm/display/drm_hdcp_helper.h
> @@ -19,7 +19,7 @@ int drm_hdcp_check_ksvs_revoked(struct drm_device *dev, u8 *ksvs, u32 ksv_count)
>   int drm_connector_attach_content_protection_property(struct drm_connector *connector,
>   						     bool hdcp_content_type);
>   void drm_hdcp_update_content_protection(struct drm_connector *connector, u64 val);
> -void drm_hdcp_atomic_check(struct drm_connector *connector,
> +bool drm_hdcp_atomic_check(struct drm_connector *connector,
>   			   struct drm_atomic_state *state);
>   
>   #endif
Suraj Kandpal March 10, 2023, 6 a.m. UTC | #2 
> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@lists.freedesktop.org> On Behalf Of Mark
> Yacoub
> Sent: Thursday, January 19, 2023 1:00 AM
> 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
> Cc: quic_sbillaka@quicinc.com; konrad.dybcio@somainline.org;
> bjorn.andersson@linaro.org; krzysztof.kozlowski+dt@linaro.org;
> airlied@gmail.com; hbh25y@gmail.com; Vasut, Marek <marex@denx.de>;
> abhinavk@codeaurora.org; javierm@redhat.com; agross@kernel.org;
> quic_jesszhan@quicinc.com; daniel@ffwll.ch; Nikula, Jani
> <jani.nikula@intel.com>; De Marchi, Lucas <lucas.demarchi@intel.com>;
> quic_abhinavk@quicinc.com; swboyd@chromium.org; robh+dt@kernel.org;
> christophe.jaillet@wanadoo.fr; maxime@cerno.tech; Vivi, Rodrigo
> <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
> Subject: [Intel-gfx] [PATCH v6 02/10] drm/hdcp: Avoid changing crtc state in
> hdcp atomic check
> 
> From: Sean Paul <seanpaul@chromium.org>
> 
> Instead of forcing a modeset in the hdcp atomic check, simply return true if
> the content protection value is changing and let the driver decide whether a
> modeset is required or not.
> 
> Acked-by: Jani Nikula <jani.nikula@intel.com>
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> Signed-off-by: Mark Yacoub <markyacoub@chromium.org>
> Link:
> https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-3-
> sean@poorly.run #v1
> Link:
> https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-3-
> sean@poorly.run #v2
> Link:
> https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-3-
> sean@poorly.run #v3
> Link:
> https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-
> 3-sean@poorly.run #v4
> Link:
> https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-
> 3-sean@poorly.run #v5
> 
> Changes in v2:
> -None
> Changes in v3:
> -None
> Changes in v4:
> -None
> Changes in v5:
> -None
> Changes in V6:
> -Rebase: modifications in drm_hdcp_helper.c instead of drm_hdcp.c
> 
> ---
>  drivers/gpu/drm/display/drm_hdcp_helper.c   | 33 +++++++++++++++------
>  drivers/gpu/drm/i915/display/intel_atomic.c |  6 ++--
>  include/drm/display/drm_hdcp_helper.h       |  2 +-
>  3 files changed, 27 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/display/drm_hdcp_helper.c
> b/drivers/gpu/drm/display/drm_hdcp_helper.c
> index 7d910523b05f..a3896b0904b5 100644
> --- a/drivers/gpu/drm/display/drm_hdcp_helper.c
> +++ b/drivers/gpu/drm/display/drm_hdcp_helper.c
> @@ -428,11 +428,14 @@
> EXPORT_SYMBOL(drm_hdcp_update_content_protection);
>   * @connector: drm_connector on which content protection state needs an
> update
>   *
>   * This function can be used by display drivers to perform an atomic check
> on the
> - * hdcp state elements. If hdcp state has changed, this function will set
> - * mode_changed on the crtc driving the connector so it can update its
> hardware
> - * to match the hdcp state.
> + * hdcp state elements. If hdcp state has changed in a manner which
> + requires the
> + * driver to enable or disable content protection, this function will
> + return
> + * true.
> + *
> + * Returns:
> + * true if the driver must enable/disable hdcp, false otherwise
>   */
> -void drm_hdcp_atomic_check(struct drm_connector *connector,
> +bool drm_hdcp_atomic_check(struct drm_connector *connector,
>  			   struct drm_atomic_state *state)
>  {
>  	struct drm_connector_state *new_conn_state, *old_conn_state;
> @@ -450,10 +453,12 @@ void drm_hdcp_atomic_check(struct
> drm_connector *connector,
>  		 * If the connector is being disabled with CP enabled, mark it
>  		 * desired so it's re-enabled when the connector is brought
> back
>  		 */
> -		if (old_hdcp ==
> DRM_MODE_CONTENT_PROTECTION_ENABLED)
> +		if (old_hdcp ==
> DRM_MODE_CONTENT_PROTECTION_ENABLED) {
>  			new_conn_state->content_protection =
> 
> 	DRM_MODE_CONTENT_PROTECTION_DESIRED;
> -		return;
> +			return true;
> +		}
> +		return false;
>  	}
> 
>  	new_crtc_state =
> @@ -465,9 +470,19 @@ void drm_hdcp_atomic_check(struct
> drm_connector *connector,
>  	*/
>  	if (drm_atomic_crtc_needs_modeset(new_crtc_state) &&
>  	    (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
> -	     new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
> +	     new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
> {
>  		new_conn_state->content_protection =
>  			DRM_MODE_CONTENT_PROTECTION_DESIRED;
> +		return true;
> +	}
> +
> +	/*
> +	 * Coming back from disable or changing CRTC with DESIRED state
> requires
> +	 * that the driver try CP enable.
> +	 */

Hi ,
We can have a clearer comment which says something like "Coming back from
UNDESIRED state, CRTC change or re-enablement requires the driver to try CP enable"

Regards,
Suraj Kandpal
> +	if (new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
> +	    new_conn_state->crtc != old_conn_state->crtc)
> +		return true;
> 
>  	/*
>  	 * Nothing to do if content type is unchanged and one of:
> @@ -482,9 +497,9 @@ void drm_hdcp_atomic_check(struct drm_connector
> *connector,
>  	     new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED)) {
>  		if (old_conn_state->hdcp_content_type ==
>  		    new_conn_state->hdcp_content_type)
> -			return;
> +			return false;
>  	}
> 
> -	new_crtc_state->mode_changed = true;
> +	return true;
>  }
>  EXPORT_SYMBOL(drm_hdcp_atomic_check);
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c
> b/drivers/gpu/drm/i915/display/intel_atomic.c
> index 8a473199c4bf..a2067cbae2d5 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -123,8 +123,6 @@ int intel_digital_connector_atomic_check(struct
> drm_connector *conn,
>  		to_intel_digital_connector_state(old_state);
>  	struct drm_crtc_state *crtc_state;
> 
> -	drm_hdcp_atomic_check(conn, state);
> -
>  	if (!new_state->crtc)
>  		return 0;
> 
> @@ -140,8 +138,8 @@ int intel_digital_connector_atomic_check(struct
> drm_connector *conn,
>  	    new_conn_state->base.picture_aspect_ratio != old_conn_state-
> >base.picture_aspect_ratio ||
>  	    new_conn_state->base.content_type != old_conn_state-
> >base.content_type ||
>  	    new_conn_state->base.scaling_mode != old_conn_state-
> >base.scaling_mode ||
> -	    new_conn_state->base.privacy_screen_sw_state !=
> old_conn_state->base.privacy_screen_sw_state ||
> -	    !drm_connector_atomic_hdr_metadata_equal(old_state,
> new_state))
> +	    !drm_connector_atomic_hdr_metadata_equal(old_state,
> new_state) ||
> +	    drm_hdcp_atomic_check(conn, state))
>  		crtc_state->mode_changed = true;
> 
>  	return 0;
> diff --git a/include/drm/display/drm_hdcp_helper.h
> b/include/drm/display/drm_hdcp_helper.h
> index dd02b2e72a50..cb2cc5002f65 100644
> --- a/include/drm/display/drm_hdcp_helper.h
> +++ b/include/drm/display/drm_hdcp_helper.h
> @@ -19,7 +19,7 @@ int drm_hdcp_check_ksvs_revoked(struct drm_device
> *dev, u8 *ksvs, u32 ksv_count)  int
> drm_connector_attach_content_protection_property(struct drm_connector
> *connector,
>  						     bool hdcp_content_type);
>  void drm_hdcp_update_content_protection(struct drm_connector
> *connector, u64 val); -void drm_hdcp_atomic_check(struct drm_connector
> *connector,
> +bool drm_hdcp_atomic_check(struct drm_connector *connector,
>  			   struct drm_atomic_state *state);
> 
>  #endif
> --
> 2.39.0.246.g2a6d74b583-goog
diff mbox series

Patch

diff --git a/drivers/gpu/drm/display/drm_hdcp_helper.c b/drivers/gpu/drm/display/drm_hdcp_helper.c
index 7d910523b05f..a3896b0904b5 100644
--- a/drivers/gpu/drm/display/drm_hdcp_helper.c
+++ b/drivers/gpu/drm/display/drm_hdcp_helper.c
@@ -428,11 +428,14 @@  EXPORT_SYMBOL(drm_hdcp_update_content_protection);
  * @connector: drm_connector on which content protection state needs an update
  *
  * This function can be used by display drivers to perform an atomic check on the
- * hdcp state elements. If hdcp state has changed, this function will set
- * mode_changed on the crtc driving the connector so it can update its hardware
- * to match the hdcp state.
+ * hdcp state elements. If hdcp state has changed in a manner which requires the
+ * driver to enable or disable content protection, this function will return
+ * true.
+ *
+ * Returns:
+ * true if the driver must enable/disable hdcp, false otherwise
  */
-void drm_hdcp_atomic_check(struct drm_connector *connector,
+bool drm_hdcp_atomic_check(struct drm_connector *connector,
 			   struct drm_atomic_state *state)
 {
 	struct drm_connector_state *new_conn_state, *old_conn_state;
@@ -450,10 +453,12 @@  void drm_hdcp_atomic_check(struct drm_connector *connector,
 		 * If the connector is being disabled with CP enabled, mark it
 		 * desired so it's re-enabled when the connector is brought back
 		 */
-		if (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED)
+		if (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
 			new_conn_state->content_protection =
 				DRM_MODE_CONTENT_PROTECTION_DESIRED;
-		return;
+			return true;
+		}
+		return false;
 	}
 
 	new_crtc_state =
@@ -465,9 +470,19 @@  void drm_hdcp_atomic_check(struct drm_connector *connector,
 	*/
 	if (drm_atomic_crtc_needs_modeset(new_crtc_state) &&
 	    (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
-	     new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
+	     new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED)) {
 		new_conn_state->content_protection =
 			DRM_MODE_CONTENT_PROTECTION_DESIRED;
+		return true;
+	}
+
+	/*
+	 * Coming back from disable or changing CRTC with DESIRED state requires
+	 * that the driver try CP enable.
+	 */
+	if (new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
+	    new_conn_state->crtc != old_conn_state->crtc)
+		return true;
 
 	/*
 	 * Nothing to do if content type is unchanged and one of:
@@ -482,9 +497,9 @@  void drm_hdcp_atomic_check(struct drm_connector *connector,
 	     new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED)) {
 		if (old_conn_state->hdcp_content_type ==
 		    new_conn_state->hdcp_content_type)
-			return;
+			return false;
 	}
 
-	new_crtc_state->mode_changed = true;
+	return true;
 }
 EXPORT_SYMBOL(drm_hdcp_atomic_check);
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index 8a473199c4bf..a2067cbae2d5 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -123,8 +123,6 @@  int intel_digital_connector_atomic_check(struct drm_connector *conn,
 		to_intel_digital_connector_state(old_state);
 	struct drm_crtc_state *crtc_state;
 
-	drm_hdcp_atomic_check(conn, state);
-
 	if (!new_state->crtc)
 		return 0;
 
@@ -140,8 +138,8 @@  int intel_digital_connector_atomic_check(struct drm_connector *conn,
 	    new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
 	    new_conn_state->base.content_type != old_conn_state->base.content_type ||
 	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
-	    new_conn_state->base.privacy_screen_sw_state != old_conn_state->base.privacy_screen_sw_state ||
-	    !drm_connector_atomic_hdr_metadata_equal(old_state, new_state))
+	    !drm_connector_atomic_hdr_metadata_equal(old_state, new_state) ||
+	    drm_hdcp_atomic_check(conn, state))
 		crtc_state->mode_changed = true;
 
 	return 0;
diff --git a/include/drm/display/drm_hdcp_helper.h b/include/drm/display/drm_hdcp_helper.h
index dd02b2e72a50..cb2cc5002f65 100644
--- a/include/drm/display/drm_hdcp_helper.h
+++ b/include/drm/display/drm_hdcp_helper.h
@@ -19,7 +19,7 @@  int drm_hdcp_check_ksvs_revoked(struct drm_device *dev, u8 *ksvs, u32 ksv_count)
 int drm_connector_attach_content_protection_property(struct drm_connector *connector,
 						     bool hdcp_content_type);
 void drm_hdcp_update_content_protection(struct drm_connector *connector, u64 val);
-void drm_hdcp_atomic_check(struct drm_connector *connector,
+bool drm_hdcp_atomic_check(struct drm_connector *connector,
 			   struct drm_atomic_state *state);
 
 #endif