On Mon, Apr 11, 2022 at 08:47:31PM +0000, Sean Paul wrote:
> 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>
> Signed-off-by: Sean Paul <seanp...@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
>
> Changes in v2:
> -None
> Changes in v3:
> -None
> Changes in v4:
> -None
> Changes in v5:
> -None
> ---
> drivers/gpu/drm/drm_hdcp.c | 33 +++++++++++++++------
> drivers/gpu/drm/i915/display/intel_atomic.c | 5 ++--
> include/drm/drm_hdcp.h | 2 +-
> 3 files changed, 27 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_hdcp.c b/drivers/gpu/drm/drm_hdcp.c
> index 522326b03e66..dd8fa91c51d6 100644
> --- a/drivers/gpu/drm/drm_hdcp.c
> +++ b/drivers/gpu/drm/drm_hdcp.c
> @@ -430,11 +430,14 @@ 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;
> @@ -452,10 +455,12 @@ 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 = drm_atomic_get_new_crtc_state(state,
> @@ -467,9 +472,19 @@ 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;
I'm with the feeling that this chunk should deserve a separated patch.
But the reason looks correct so anyway
Reviewed-by: Rodrigo Vivi <rodrigo.v...@intel.com>
>
> /*
> * Nothing to do if content type is unchanged and one of:
> @@ -484,9 +499,9 @@ 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 b301a4d1017e..6d24b3450399 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -124,8 +124,6 @@ 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;
>
> @@ -142,7 +140,8 @@ int intel_digital_connector_atomic_check(struct
> drm_connector *conn,
> 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/drm_hdcp.h b/include/drm/drm_hdcp.h
> index d49977a042e1..e6e3d16bc7d3 100644
> --- a/include/drm/drm_hdcp.h
> +++ b/include/drm/drm_hdcp.h
> @@ -301,7 +301,7 @@ 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);
>
> /* Content Type classification for HDCP2.2 vs others */
> --
> Sean Paul, Software Engineer, Google / Chromium OS
>
