Initialization of the drm hdcp stack drm_hdcp_init is implemented. This function has to be called by the display driver to get the DRM support for HDCP.
This function will take the pointers to the drm_hdcp and associated drm_conenctor. These two entities will be linked. And HDCP version supported by the Display driver is received as another parameter. And corresponding callback fucntions can be validated.
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- drivers/gpu/drm/drm_hdcp.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++ include/drm/drm_hdcp.h | 7 +++++ 2 files changed, 82 insertions(+) create mode 100644 drivers/gpu/drm/drm_hdcp.c
diff --git a/drivers/gpu/drm/drm_hdcp.c b/drivers/gpu/drm/drm_hdcp.c new file mode 100644 index 0000000..481bc24 --- /dev/null +++ b/drivers/gpu/drm/drm_hdcp.c @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2017 Intel Corporation + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ +/** + * Implementation of HDCP stack for DRM + */ +#include <linux/errno.h> +#include <linux/export.h> +#include <linux/i2c.h> +#include <drm/drmP.h> +#include <drm/drm_connector.h> +#include <drm/drm_hdcp.h> +#include <drm/drm_dp_helper.h> + +/** + * @drm_hdcp_init: + * Initialization of the HDCP stack of the DRM + * + * Return 0 on success else -ve. + */ +int drm_hdcp_init(struct drm_connector *connector, + struct drm_hdcp *hdcp, + uint8_t spec_supported) +{ + struct drm_mode_config *config = &connector->dev->mode_config; + + if (!hdcp) + return -EINVAL; + + if (!hdcp->hdcp_funcs) { + DRM_ERROR("Callback functions are missing\n"); + return -EINVAL; + } + + if (!spec_supported) { + DRM_ERROR("HDCP version support is not mentioned\n"); + return -EINVAL; + } + + /* Check for Essential Service Funcs */ + if (!hdcp->hdcp_funcs->link_write || !hdcp->hdcp_funcs->link_read) + return -EINVAL; + + hdcp->ver_support_on_plat = spec_supported; + + connector->hdcp = hdcp; + hdcp->connector = connector; + + drm_object_attach_property(&connector->base, + config->hdcp_property, + 0); + + mutex_init(&hdcp->mutex); + + return 0; +} +EXPORT_SYMBOL(drm_hdcp_init); diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index 2a48ef9..e8136ef 100644 --- a/include/drm/drm_hdcp.h +++ b/include/drm/drm_hdcp.h @@ -37,6 +37,9 @@ struct drm_hdcp; #define HDCP_1_4_SUPPORT (1<<0) #define HDCP_2_2_SUPPORT (1<<1)
+#define HDCP_STREAM_TYPE0_CODE 0x00 +#define HDCP_STREAM_TYPE1_CODE 0x01 + /** * @enum hdcp_status Enumeration of all HDCP Status Codes */ @@ -154,4 +157,8 @@ struct drm_hdcp { DRM_HDCP_LINK_INTEGRITY_FAILED | \ DRM_HDCP_REAUTH_REQUESTED)
+/* Functions exported */ +extern int drm_hdcp_init(struct drm_connector *connector, + struct drm_hdcp *hdcp, + uint8_t spec_supported); #endif /* __DRM_HDCP_H__ */