Request ME FW to start the HDCP2.2 session for an intel port. Prepares payloads for command WIRED_INITIATE_HDCP2_SESSION and sends to ME FW.
On Success, ME FW will start a HDCP2.2 session for the port and provides the content for HDCP2.2 AKE_Init message.
v2: Rebased. v3: cldev is add as a separate parameter [Tomas] Redundant comment and typecast are removed [Tomas] v4: %zd is used for size [Alexander] %s/return -1/return -EIO [Alexander] Spellings in commit msg is fixed [Uma] v5: Rebased. v6: Collected the rb-ed by. Realigning the patches in the series. v7: Adjust to the new mei interface. Fix for kdoc. v8: K-Doc Addition. memcpy for const length. v9: s/mei_hdcp_ddi/mei_fw_ddi s/i915_port/mei_i915_port [Tomas] renamed func as mei_hdcp_* [Tomas] Instead of macro, inline func for ddi index is used. [Tomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com Reviewed-by: Uma Shankar uma.shankar@intel.com
drivers/misc/mei/hdcp/mei_hdcp.c | 89 ++++++++++++++++++++++++++++++++++++++++ drivers/misc/mei/hdcp/mei_hdcp.h | 23 +++++++++++ 2 files changed, 112 insertions(+)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index b8580b91e255..77dda13fcc88 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -23,6 +23,95 @@ #include <linux/slab.h> #include <linux/uuid.h> #include <linux/mei_cl_bus.h> +#include <drm/drm_connector.h> +#include <drm/i915_component.h> +#include <drm/i915_mei_hdcp_interface.h>
+#include "mei_hdcp.h"
+static inline u8 mei_get_ddi_index(short int port) {
- enum mei_i915_port i915_port = (enum mei_i915_port)port;
- return (u8)(i915_port == PORT_A ? MEI_DDI_A : i915_port); }
This translations from enum port to short int, than to eum mei_i915_port and then to u8 bothers me. Should be a cleaner Maybe it's a bit overhead but it will be much more readlbe if we do switch statement here:
switch (port) { case PORT_A: return MEI_DDI_A: case PORT_B: return MEI_DDI_B etc. case: I915_MAX_PORTS default: MEI_DDI_INVALID_PORT } Otherwise looks good to me.
+/**
- mei_hdcp_initiate_session() - Initiate a Wired HDCP2.2 Tx Session in
+ME FW
- @dev: device corresponding to the mei_cl_device
- @hdcp_data: Intel HW specific hdcp data
- @ake_data: AKE_Init msg output.
- Return: 0 on Success, <0 on Failure.
- */
+static int +mei_hdcp_initiate_session(struct device *dev, struct hdcp_port_data *data,
struct hdcp2_ake_init *ake_data)+{
- struct wired_cmd_initiate_hdcp2_session_in session_init_in = { { 0 } };
- struct wired_cmd_initiate_hdcp2_session_out
session_init_out = { { 0 } };- struct mei_cl_device *cldev;
- ssize_t byte;
- if (!dev || !data || !ake_data)
return -EINVAL;- cldev = to_mei_cl_device(dev);
- session_init_in.header.api_version = HDCP_API_VERSION;
- session_init_in.header.command_id =
WIRED_INITIATE_HDCP2_SESSION;
- session_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
- session_init_in.header.buffer_len =
- WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN;
- session_init_in.port.integrated_port_type = data->port_type;
- session_init_in.port.physical_port = mei_get_ddi_index(data->port);
- session_init_in.protocol = data->protocol;
- byte = mei_cldev_send(cldev, (u8 *)&session_init_in,
sizeof(session_init_in));- if (byte < 0) {
dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);return byte;- }
- byte = mei_cldev_recv(cldev, (u8 *)&session_init_out,
sizeof(session_init_out));- if (byte < 0) {
dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);return byte;- }
- if (session_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {
dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",WIRED_INITIATE_HDCP2_SESSION,session_init_out.header.status);return -EIO;- }
- ake_data->msg_id = HDCP_2_2_AKE_INIT;
- ake_data->tx_caps = session_init_out.tx_caps;
- memcpy(ake_data->r_tx, session_init_out.r_tx, HDCP_2_2_RTX_LEN);
- return 0;
+}
+static __attribute__((unused)) +struct i915_hdcp_component_ops mei_hdcp_ops = {
- .owner = THIS_MODULE,
- .initiate_hdcp2_session = mei_hdcp_initiate_session,
- .verify_receiver_cert_prepare_km = NULL,
- .verify_hprime = NULL,
- .store_pairing_info = NULL,
- .initiate_locality_check = NULL,
- .verify_lprime = NULL,
- .get_session_key = NULL,
- .repeater_check_flow_prepare_ack = NULL,
- .verify_mprime = NULL,
- .enable_hdcp_authentication = NULL,
- .close_hdcp_session = NULL,
+};
static int mei_hdcp_probe(struct mei_cl_device *cldev, const struct mei_cl_device_id *id) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.h b/drivers/misc/mei/hdcp/mei_hdcp.h index 582a7e27ae29..28686f2ae88c 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.h +++ b/drivers/misc/mei/hdcp/mei_hdcp.h @@ -363,4 +363,27 @@ struct wired_cmd_repeater_auth_stream_req_out { struct hdcp_port_id port; } __packed;
+enum mei_fw_ddi {
- MEI_DDI_INVALID_PORT = 0x0,
- MEI_DDI_B = 1,
- MEI_DDI_C,
- MEI_DDI_D,
- MEI_DDI_E,
- MEI_DDI_F,
- MEI_DDI_A = 7,
- MEI_DDI_RANGE_END = MEI_DDI_A,
+};
+enum mei_i915_port {
This is the same as enum port why not using that and keep them in sync.
- PORT_NONE = -1,
- PORT_A = 0,
- PORT_B,
- PORT_C,
- PORT_D,
- PORT_E,
- PORT_F,
- I915_MAX_PORTS,
+};
#endif /* __MEI_HDCP_H__ */
2.7.4