On 2020-01-09 at 18:25:08 +0530, Anshuman Gupta wrote:
> When port is disabled due to modeset or DPMS off actually
> it disables the HDCP encryption keeping its state to
s/state/"content protection property as"
> CP_ENABLED.
> this doesn't enable HDCP again while port
> gets enable again.
Since the content protection is left at ENABLED state by mistake at next
DDI enable flow HDCP auth is not attempted.
> HDCP state should set accordingly
content protection property state should be updated as per port
authentication state.
> when port is disabled.
>
> v2: Incorporated the necessary locking and making sure
> when user explicitly set HDCP to UNDESRIED it should
> make HDCP to desired while disabling DDI. (Ram)
Need to rephrase this too.
>
> CC: Ramalingam C <ramalingam.c@xxxxxxxxx>
> Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_display_types.h | 1 +
> drivers/gpu/drm/i915/display/intel_hdcp.c | 12 +++++++++++-
> 2 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 630a94892b7b..f2552a52f26a 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -344,6 +344,7 @@ struct intel_hdcp {
> u64 value;
> struct delayed_work check_work;
> struct work_struct prop_work;
> + bool is_hdcp_undesired;
small comment on why this is needed now would be good.
/* Indicates whether HDCP is UNDESIERD by userspace */
>
> /* HDCP1.4 Encryption status */
> bool hdcp_encrypted;
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index 0fdbd39f6641..507056aab33b 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -2002,11 +2002,17 @@ int intel_hdcp_disable(struct intel_connector *connector)
> mutex_lock(&hdcp->mutex);
>
> if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
> - hdcp->value = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
> if (hdcp->hdcp2_encrypted)
> ret = _intel_hdcp2_disable(connector);
> else if (hdcp->hdcp_encrypted)
> ret = _intel_hdcp_disable(connector);
> +
> + if (hdcp->is_hdcp_undesired) {
> + hdcp->value = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
> + } else {
> + hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
> + schedule_work(&hdcp->prop_work);
> + }
> }
>
> mutex_unlock(&hdcp->mutex);
> @@ -2044,6 +2050,7 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
> {
> u64 old_cp = old_state->content_protection;
> u64 new_cp = new_state->content_protection;
> + struct intel_connector *intel_conn = to_intel_connector(connector);
> struct drm_crtc_state *crtc_state;
>
> if (!new_state->crtc) {
> @@ -2069,6 +2076,9 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
> return;
> }
>
> + if (new_cp == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
> + intel_conn->hdcp.is_hdcp_undesired = true;
This flag will be always left at true. reset it to false as soon as used
at intel_hdcp_disable()
-Ram
> +
> crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
> new_state->crtc);
> crtc_state->mode_changed = true;
> --
> 2.24.0
>
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