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Message-Id: <20230331221213.1691997-2-markyacoub@google.com>
Date: Fri, 31 Mar 2023 18:12:03 -0400
From: Mark Yacoub <markyacoub@...omium.org>
To: David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
Cc: seanpaul@...omium.org, suraj.kandpal@...el.com,
dianders@...omium.org, dri-devel@...ts.freedesktop.org,
freedreno@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
Jani Nikula <jani.nikula@...el.com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Mark Yacoub <markyacoub@...omium.org>,
linux-kernel@...r.kernel.org
Subject: [PATCH v8 01/10] drm/hdcp: Add drm_hdcp_atomic_check()
From: Sean Paul <seanpaul@...omium.org>
Move the hdcp atomic check from i915 to drm_hdcp so other
drivers can use it. No functional changes, just cleaned up some of the
code when moving it over.
Acked-by: Jani Nikula <jani.nikula@...el.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Signed-off-by: Mark Yacoub <markyacoub@...omium.org>
---
Changes in v2:
-None
Changes in v3:
-None
Changes in v4:
-None
Changes in v5:
-None
Changes in v6:
-Rebase: move helper from drm_hdcp.c to drm_hdcp_helper.c
Changes in v7:
-Removed links to patch from commit msg (Dmitry Baryshkov)
Changes in v8:
-None
drivers/gpu/drm/display/drm_hdcp_helper.c | 64 +++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_atomic.c | 4 +-
drivers/gpu/drm/i915/display/intel_hdcp.c | 47 ---------------
drivers/gpu/drm/i915/display/intel_hdcp.h | 3 -
include/drm/display/drm_hdcp_helper.h | 3 +
5 files changed, 69 insertions(+), 52 deletions(-)
diff --git a/drivers/gpu/drm/display/drm_hdcp_helper.c b/drivers/gpu/drm/display/drm_hdcp_helper.c
index e78999c72bd77..7ca390b3ea106 100644
--- a/drivers/gpu/drm/display/drm_hdcp_helper.c
+++ b/drivers/gpu/drm/display/drm_hdcp_helper.c
@@ -20,6 +20,7 @@
#include <drm/drm_property.h>
#include <drm/drm_mode_object.h>
#include <drm/drm_connector.h>
+#include <drm/drm_atomic.h>
static inline void drm_hdcp_print_ksv(const u8 *ksv)
{
@@ -419,3 +420,66 @@ void drm_hdcp_update_content_protection(struct drm_connector *connector,
dev->mode_config.content_protection_property);
}
EXPORT_SYMBOL(drm_hdcp_update_content_protection);
+
+/**
+ * drm_hdcp_atomic_check - Helper for drivers to call during connector->atomic_check
+ *
+ * @state: pointer to the atomic state being checked
+ * @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.
+ */
+void drm_hdcp_atomic_check(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector_state *new_conn_state, *old_conn_state;
+ struct drm_crtc_state *new_crtc_state;
+ u64 old_hdcp, new_hdcp;
+
+ old_conn_state = drm_atomic_get_old_connector_state(state, connector);
+ old_hdcp = old_conn_state->content_protection;
+
+ new_conn_state = drm_atomic_get_new_connector_state(state, connector);
+ new_hdcp = new_conn_state->content_protection;
+
+ if (!new_conn_state->crtc) {
+ /*
+ * 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)
+ new_conn_state->content_protection =
+ DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ return;
+ }
+
+ new_crtc_state =
+ drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
+ if (drm_atomic_crtc_needs_modeset(new_crtc_state) &&
+ (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
+ new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
+ new_conn_state->content_protection =
+ DRM_MODE_CONTENT_PROTECTION_DESIRED;
+
+ /*
+ * Nothing to do if content type is unchanged and one of:
+ * - state didn't change
+ * - HDCP was activated since the last commit
+ * - attempting to set to desired while already enabled
+ */
+ if (old_hdcp == new_hdcp ||
+ (old_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
+ new_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED) ||
+ (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
+ new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED)) {
+ if (old_conn_state->hdcp_content_type ==
+ new_conn_state->hdcp_content_type)
+ return;
+ }
+
+ new_crtc_state->mode_changed = 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 a9a3f3715279d..e9d00b6a63d39 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -32,6 +32,7 @@
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fourcc.h>
+#include <drm/display/drm_hdcp_helper.h>
#include "i915_drv.h"
#include "i915_reg.h"
@@ -39,7 +40,6 @@
#include "intel_cdclk.h"
#include "intel_display_types.h"
#include "intel_global_state.h"
-#include "intel_hdcp.h"
#include "intel_psr.h"
#include "intel_fb.h"
#include "skl_universal_plane.h"
@@ -124,7 +124,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
to_intel_digital_connector_state(old_state);
struct drm_crtc_state *crtc_state;
- intel_hdcp_atomic_check(conn, old_state, new_state);
+ drm_hdcp_atomic_check(conn, state);
if (!new_state->crtc)
return 0;
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 6406fd487ee52..396d2cef000aa 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -2524,53 +2524,6 @@ void intel_hdcp_cleanup(struct intel_connector *connector)
mutex_unlock(&hdcp->mutex);
}
-void intel_hdcp_atomic_check(struct drm_connector *connector,
- struct drm_connector_state *old_state,
- struct drm_connector_state *new_state)
-{
- u64 old_cp = old_state->content_protection;
- u64 new_cp = new_state->content_protection;
- struct drm_crtc_state *crtc_state;
-
- if (!new_state->crtc) {
- /*
- * 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_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED)
- new_state->content_protection =
- DRM_MODE_CONTENT_PROTECTION_DESIRED;
- return;
- }
-
- crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
- new_state->crtc);
- /*
- * Fix the HDCP uapi content protection state in case of modeset.
- * FIXME: As per HDCP content protection property uapi doc, an uevent()
- * need to be sent if there is transition from ENABLED->DESIRED.
- */
- if (drm_atomic_crtc_needs_modeset(crtc_state) &&
- (old_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
- new_cp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
- new_state->content_protection =
- DRM_MODE_CONTENT_PROTECTION_DESIRED;
-
- /*
- * Nothing to do if the state didn't change, or HDCP was activated since
- * the last commit. And also no change in hdcp content type.
- */
- if (old_cp == new_cp ||
- (old_cp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
- new_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED)) {
- if (old_state->hdcp_content_type ==
- new_state->hdcp_content_type)
- return;
- }
-
- crtc_state->mode_changed = true;
-}
-
/* Handles the CP_IRQ raised from the DP HDCP sink */
void intel_hdcp_handle_cp_irq(struct intel_connector *connector)
{
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.h b/drivers/gpu/drm/i915/display/intel_hdcp.h
index 8f53b0c7fe5cf..7c5fd84a7b65a 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.h
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.h
@@ -22,9 +22,6 @@ struct intel_digital_port;
enum port;
enum transcoder;
-void intel_hdcp_atomic_check(struct drm_connector *connector,
- struct drm_connector_state *old_state,
- struct drm_connector_state *new_state);
int intel_hdcp_init(struct intel_connector *connector,
struct intel_digital_port *dig_port,
const struct intel_hdcp_shim *hdcp_shim);
diff --git a/include/drm/display/drm_hdcp_helper.h b/include/drm/display/drm_hdcp_helper.h
index 8aaf87bf27351..dd02b2e72a502 100644
--- a/include/drm/display/drm_hdcp_helper.h
+++ b/include/drm/display/drm_hdcp_helper.h
@@ -11,6 +11,7 @@
#include <drm/display/drm_hdcp.h>
+struct drm_atomic_state;
struct drm_device;
struct drm_connector;
@@ -18,5 +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,
+ struct drm_atomic_state *state);
#endif
--
2.40.0.348.gf938b09366-goog
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