On Wed, Jun 27, 2018 at 02:10:09PM +0530, Ramalingam C wrote:
> On DP HDCP1.4 and 2.2, when CP_IRQ is received, start the link
> integrity check for the HDCP version that is enabled.
>
> v2:
> Rebased. Function name is changed.
> v3:
> No Changes.
> v4:
> No Changes.
> v5:
> No Changes.
>
> Signed-off-by: Ramalingam C <ramalinga...@intel.com>
> cc: Sean Paul <seanp...@chromium.org>
> ---
> drivers/gpu/drm/i915/intel_dp.c | 2 +-
> drivers/gpu/drm/i915/intel_drv.h | 2 +-
> drivers/gpu/drm/i915/intel_hdcp.c | 31 ++++++++++++++++++++++++++++++-
> 3 files changed, 32 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 7467e7b3f2df..a6ba27ef20ae 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -4484,7 +4484,7 @@ intel_dp_short_pulse(struct intel_dp *intel_dp)
> if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
> intel_dp_handle_test_request(intel_dp);
> if (sink_irq_vector & DP_CP_IRQ)
> - intel_hdcp_check_link(intel_dp->attached_connector);
> + intel_hdcp_handle_cp_irq(intel_dp->attached_connector);
> if (sink_irq_vector & DP_SINK_SPECIFIC_IRQ)
> DRM_DEBUG_DRIVER("Sink specific irq unhandled\n");
> }
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 7624388eecd5..875657fd7d3c 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1965,8 +1965,8 @@ int intel_hdcp_init(struct intel_connector *connector,
> bool hdcp2_supported);
> int intel_hdcp_enable(struct intel_connector *connector);
> int intel_hdcp_disable(struct intel_connector *connector);
> -int intel_hdcp_check_link(struct intel_connector *connector);
> bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port);
> +void intel_hdcp_handle_cp_irq(struct intel_connector *connector);
>
> /* intel_psr.c */
> #define CAN_PSR(dev_priv) (HAS_PSR(dev_priv) && dev_priv->psr.sink_support)
> diff --git a/drivers/gpu/drm/i915/intel_hdcp.c
> b/drivers/gpu/drm/i915/intel_hdcp.c
> index 790f4a9f4793..b035274785c8 100644
> --- a/drivers/gpu/drm/i915/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/intel_hdcp.c
> @@ -32,6 +32,7 @@ int intel_hdcp_read_valid_bksv(struct intel_digital_port
> *intel_dig_port,
> const struct intel_hdcp_shim *shim, u8 *bksv);
> static
> struct intel_digital_port *conn_to_dig_port(struct intel_connector
> *connector);
> +static int intel_hdcp_check_link(struct intel_connector *connector);
>
> static bool panel_supports_hdcp(struct intel_connector *connector)
> {
> @@ -80,6 +81,26 @@ static inline bool intel_hdcp2_capable(struct
> intel_connector *connector)
> panel_supports_hdcp2(connector));
> }
>
> +static inline bool intel_hdcp_in_force(struct intel_connector *connector)
nit: I'd use _in_use instead of in_force
With that fixed,
Reviewed-by: Sean Paul <seanp...@chromium.org>
> +{
> + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> + enum port port = connector->encoder->port;
> + u32 reg;
> +
> + reg = I915_READ(PORT_HDCP_STATUS(port));
> + return reg & (HDCP_STATUS_AUTH | HDCP_STATUS_ENC);
> +}
> +
> +static inline bool intel_hdcp2_in_force(struct intel_connector *connector)
> +{
> + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> + enum port port = connector->encoder->port;
> + u32 reg;
> +
> + reg = I915_READ(HDCP2_STATUS_DDI(port));
> + return reg & (LINK_ENCRYPTION_STATUS | LINK_AUTH_STATUS);
> +}
> +
> static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port
> *intel_dig_port,
> const struct intel_hdcp_shim *shim)
> {
> @@ -939,7 +960,7 @@ void intel_hdcp_atomic_check(struct drm_connector
> *connector,
> }
>
> /* Implements Part 3 of the HDCP authorization procedure */
> -int intel_hdcp_check_link(struct intel_connector *connector)
> +static int intel_hdcp_check_link(struct intel_connector *connector)
> {
> struct intel_hdcp *hdcp = &connector->hdcp;
> struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
> @@ -2011,3 +2032,11 @@ static void intel_hdcp2_check_work(struct work_struct
> *work)
> schedule_delayed_work(&hdcp->hdcp2_check_work,
> DRM_HDCP2_CHECK_PERIOD_MS);
> }
> +
> +void intel_hdcp_handle_cp_irq(struct intel_connector *connector)
> +{
> + if (intel_hdcp_in_force(connector))
> + intel_hdcp_check_link(connector);
> + else if (intel_hdcp2_in_force(connector))
> + intel_hdcp2_check_link(connector);
> +}
> --
> 2.7.4
>
--
Sean Paul, Software Engineer, Google / Chromium OS
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