> -----Original Message----- > From: Intel-gfx <intel-gfx-boun...@lists.freedesktop.org> On Behalf Of Mark > Yacoub > Sent: Thursday, January 19, 2023 1:00 AM > To: quic_khs...@quicinc.com; linux-arm-...@vger.kernel.org; dri- > de...@lists.freedesktop.org; freedr...@lists.freedesktop.org; > devicet...@vger.kernel.org; linux-ker...@vger.kernel.org; intel- > g...@lists.freedesktop.org > Cc: quic_sbill...@quicinc.com; konrad.dyb...@somainline.org; > bjorn.anders...@linaro.org; krzysztof.kozlowski...@linaro.org; > airl...@gmail.com; hbh...@gmail.com; Vasut, Marek <ma...@denx.de>; > abhin...@codeaurora.org; javi...@redhat.com; agr...@kernel.org; > quic_jessz...@quicinc.com; dan...@ffwll.ch; Nikula, Jani > <jani.nik...@intel.com>; De Marchi, Lucas <lucas.demar...@intel.com>; > quic_abhin...@quicinc.com; swb...@chromium.org; robh...@kernel.org; > christophe.jail...@wanadoo.fr; max...@cerno.tech; Vivi, Rodrigo > <rodrigo.v...@intel.com>; johan+lin...@kernel.org; > markyac...@chromium.org; anders...@kernel.org; > diand...@chromium.org; tzimmerm...@suse.de; > dmitry.barysh...@linaro.org; seanp...@chromium.org > Subject: [Intel-gfx] [PATCH v6 02/10] drm/hdcp: Avoid changing crtc state in > hdcp atomic check > > From: Sean Paul <seanp...@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.nik...@intel.com> > Reviewed-by: Rodrigo Vivi <rodrigo.v...@intel.com> > Signed-off-by: Sean Paul <seanp...@chromium.org> > Signed-off-by: Mark Yacoub <markyac...@chromium.org> > Link: > https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-3- > s...@poorly.run #v1 > Link: > https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-3- > s...@poorly.run #v2 > Link: > https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-3- > s...@poorly.run #v3 > Link: > https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845- > 3-s...@poorly.run #v4 > Link: > https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308- > 3-s...@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
