[Freedreno] [PATCH v2 2/3] DRM: Create new Content Protection connector property

[Mark Yacoub]

From: Mark Yacoub <markyac...@chromium.org>

[Why]
To enable Protected Content, some drivers require a key to be injected
from user space to enable HDCP on the connector.

[How]
Create new "Content Protection Property" of type "Blob"

Signed-off-by: Mark Yacoub <markyac...@chromium.org>
---
 drivers/gpu/drm/drm_atomic_uapi.c | 9 +++++++++
 include/drm/drm_connector.h       | 6 ++++++
 include/drm/drm_mode_config.h     | 6 ++++++
 3 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c 
b/drivers/gpu/drm/drm_atomic_uapi.c
index d867e7f9f2cd5..e20bc57cdb05c 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -749,6 +749,11 @@ static int drm_atomic_connector_set_property(struct 
drm_connector *connector,
                state->content_protection = val;
        } else if (property == config->hdcp_content_type_property) {
                state->hdcp_content_type = val;
+       } else if (property == config->content_protection_key_property) {
+               ret = drm_atomic_replace_property_blob_from_id(
+                       dev, &state->content_protection_key, val, -1, -1,
+                       &replaced);
+               return ret;
        } else if (property == connector->colorspace_property) {
                state->colorspace = val;
        } else if (property == config->writeback_fb_id_property) {
@@ -843,6 +848,10 @@ drm_atomic_connector_get_property(struct drm_connector 
*connector,
                *val = state->content_protection;
        } else if (property == config->hdcp_content_type_property) {
                *val = state->hdcp_content_type;
+       } else if (property == config->content_protection_key_property) {
+               *val = state->content_protection_key ?
+                              state->content_protection_key->base.id :
+                              0;
        } else if (property == config->writeback_fb_id_property) {
                /* Writeback framebuffer is one-shot, write and forget */
                *val = 0;
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 7b5048516185c..2fbe51272bfeb 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -896,6 +896,12 @@ struct drm_connector_state {
         */
        unsigned int content_protection;
 
+       /**
+        * @content_protection_key: DRM blob property for holding the Content
+        * Protection Key injected from user space.
+        */
+       struct drm_property_blob *content_protection_key;
+
        /**
         * @colorspace: State variable for Connector property to request
         * colorspace change on Sink. This is most commonly used to switch
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index e5b053001d22e..615d1e5f57562 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -887,6 +887,12 @@ struct drm_mode_config {
         */
        struct drm_property *hdcp_content_type_property;
 
+       /**
+        * @content_protection_key_property: DRM blob property that receives 
the 
+        * content protection key from user space to be injected into the 
kernel.
+        */
+       struct drm_property *content_protection_key_property;
+
        /* dumb ioctl parameters */
        uint32_t preferred_depth, prefer_shadow;
 
-- 
2.40.0.634.g4ca3ef3211-goog