-----Original Message----- From: C, Ramalingam Sent: Saturday, July 14, 2018 8:45 AM To: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; daniel@ffwll.ch; seanpaul@chromium.org; Winkler, Tomas tomas.winkler@intel.com; Usyskin, Alexander alexander.usyskin@intel.com; Shankar, Uma uma.shankar@intel.com Cc: Sharma, Shashank shashank.sharma@intel.com; C, Ramalingam ramalingam.c@intel.com Subject: [PATCH v6 19/35] drm/i915: Implement the HDCP2.2 support for HDMI
Implements the HDMI adaptation specific HDCP2.2 operations.
Basically these are DDC read and write for authenticating through HDCP2.2 messages.
v2: Rebased. v3: No Changes. v4: No more special handling of Gmbus burst read for AKE_SEND_CERT. Style fixed with few naming. [Uma] %s/PARING/PAIRING v5: msg_sz is initialized at definition. Lookup table is defined for HDMI HDCP2.2 msgs [Daniel]. v6: Rebased.
Signed-off-by: Ramalingam C ramalingam.c@intel.com
drivers/gpu/drm/i915/intel_hdmi.c | 189 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 189 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 7988f958d835..4bef2ac883bd 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -30,6 +30,7 @@ #include <linux/slab.h> #include <linux/delay.h> #include <linux/hdmi.h> +#include <linux/mei_hdcp.h> #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> @@ -1116,6 +1117,189 @@ bool intel_hdmi_hdcp_check_link(struct intel_digital_port *intel_dig_port) return true; }
+static struct hdcp2_hdmi_msg_data {
- uint8_t msg_id;
- uint32_t timeout;
- uint32_t timeout2;
- } hdcp2_msg_data[] = {
{HDCP_2_2_AKE_INIT, 0, 0},{HDCP_2_2_AKE_SEND_CERT, HDCP_2_2_CERT_TIMEOUT_MS,0},
{HDCP_2_2_AKE_NO_STORED_KM, 0, 0},{HDCP_2_2_AKE_STORED_KM, 0, 0},{HDCP_2_2_AKE_SEND_HPRIME,HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS,
- HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS},
{HDCP_2_2_AKE_SEND_PAIRING_INFO,HDCP_2_2_PAIRING_TIMEOUT_MS,
0},{HDCP_2_2_LC_INIT, 0, 0},{HDCP_2_2_LC_SEND_LPRIME,HDCP_2_2_HDMI_LPRIME_TIMEOUT_MS, 0},
{HDCP_2_2_SKE_SEND_EKS, 0, 0},{HDCP_2_2_REP_SEND_RECVID_LIST,HDCP_2_2_RECVID_LIST_TIMEOUT_MS, 0},{HDCP_2_2_REP_SEND_ACK, 0, 0},{HDCP_2_2_REP_STREAM_MANAGE, 0, 0},{HDCP_2_2_REP_STREAM_READY,HDCP_2_2_STREAM_READY_TIMEOUT_MS,
0},- };
+static +int intel_hdmi_hdcp2_read_rx_status(struct intel_digital_port *intel_dig_port,
uint8_t *rx_status)+{
- return intel_hdmi_hdcp_read(intel_dig_port,
HDCP_2_2_HDMI_REG_RXSTATUS_OFFSET,rx_status,HDCP_2_2_HDMI_RXSTATUS_LEN);+}
+static int get_hdcp2_msg_timeout(uint8_t msg_id, bool is_paired) {
- int i;
- for (i = 0; i < sizeof(hdcp2_msg_data); i++)
if (hdcp2_msg_data[i].msg_id == msg_id &&(msg_id != HDCP_2_2_AKE_SEND_HPRIME || is_paired))return hdcp2_msg_data[i].timeout;else if (hdcp2_msg_data[i].msg_id == msg_id)return hdcp2_msg_data[i].timeout2;- return -EINVAL;
+}
+static inline +int hdcp2_detect_msg_availability(struct intel_digital_port *intel_digital_port,
uint8_t msg_id, bool *msg_ready,ssize_t *msg_sz)+{
- uint8_t rx_status[HDCP_2_2_HDMI_RXSTATUS_LEN];
- int ret;
- ret = intel_hdmi_hdcp2_read_rx_status(intel_digital_port, rx_status);
- if (ret < 0) {
DRM_DEBUG_KMS("rx_status read failed. Err %d\n", ret);return ret;- }
- *msg_sz = ((HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(rx_status[1]) << 8)
|
rx_status[0]);- if (msg_id == HDCP_2_2_REP_SEND_RECVID_LIST)
*msg_ready =(HDCP_2_2_HDMI_RXSTATUS_READY(rx_status[1]) &&
*msg_sz);- else
*msg_ready = *msg_sz;- return 0;
+}
+static ssize_t +intel_hdmi_hdcp2_wait_for_msg(struct intel_digital_port *intel_dig_port,
uint8_t msg_id, bool paired)+{
- bool msg_ready = false;
- int timeout, ret;
- ssize_t msg_sz = 0;
- timeout = get_hdcp2_msg_timeout(msg_id, paired);
- if (timeout < 0)
return timeout;- ret = __wait_for(ret = hdcp2_detect_msg_availability(intel_dig_port,
msg_id, &msg_ready, &msg_sz),!ret && msg_ready && msg_sz, timeout * 1000,1000, 5 * 1000);- if (ret)
DRM_ERROR("msg_id: %d, ret: %d, timeout: %d\n",msg_id, ret, timeout);- return ret ? ret : msg_sz;
+}
+static +int intel_hdmi_hdcp2_write_msg(struct intel_digital_port *intel_dig_port,
void *buf, size_t size)+{
- unsigned int offset;
- offset = HDCP_2_2_HDMI_REG_WR_MSG_OFFSET;
- return intel_hdmi_hdcp_write(intel_dig_port, offset, buf, size); }
+static +int intel_hdmi_hdcp2_read_msg(struct intel_digital_port *intel_dig_port,
uint8_t msg_id, void *buf, size_t size) {- struct intel_hdmi *hdmi = &intel_dig_port->hdmi;
- struct intel_hdcp *hdcp = &hdmi->attached_connector->hdcp;
- unsigned int offset;
- ssize_t ret;
- ret = intel_hdmi_hdcp2_wait_for_msg(intel_dig_port, msg_id,
hdcp->is_paired);- if (ret < 0)
return ret;- /*
* Available msg size should be equal to or lesser than the* available buffer.*/- if (ret > size) {
DRM_DEBUG_KMS("msg_sz(%zd) is more than exp size(%zu)\n",ret, size);return -1;- }
- offset = HDCP_2_2_HDMI_REG_RD_MSG_OFFSET;
- ret = intel_hdmi_hdcp_read(intel_dig_port, offset, buf, ret);
- if (ret)
DRM_DEBUG_KMS("Failed to read msg_id: %d(%zd)\n", msg_id,ret);
- return ret;
+}
+static +int intel_hdmi_hdcp2_check_link(struct intel_digital_port +*intel_dig_port) {
- uint8_t rx_status[HDCP_2_2_HDMI_RXSTATUS_LEN];
- int ret;
- ret = intel_hdmi_hdcp2_read_rx_status(intel_dig_port, rx_status);
- if (ret)
return ret;- /*
* Re-auth request and Link Integrity Failures are represented by* same bit. i.e reauth_req.*/- if (HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(rx_status[1]))
ret = DRM_HDCP_REAUTH_REQUEST;- else if (HDCP_2_2_HDMI_RXSTATUS_READY(rx_status[1]))
ret = DRM_HDCP_TOPOLOGY_CHANGE;- return ret;
+}
+static +int intel_hdmi_hdcp2_capable(struct intel_digital_port *intel_dig_port,
bool *capable)+{
- uint8_t hdcp2_version;
- int ret;
- *capable = false;
- ret = intel_hdmi_hdcp_read(intel_dig_port,
HDCP_2_2_HDMI_REG_VER_OFFSET,
&hdcp2_version, sizeof(hdcp2_version));- if (!ret && hdcp2_version & HDCP_2_2_HDMI_SUPPORT_MASK)
*capable = true;- return ret;
+}
+static +enum hdcp_protocol intel_hdmi_hdcp2_protocol(void) {
Make it inline.
With this fixed. Reviewed-by: Uma Shankar uma.shankar@intel.com
- return HDCP_PROTOCOL_HDMI;
+}
static const struct intel_hdcp_shim intel_hdmi_hdcp_shim = { .write_an_aksv = intel_hdmi_hdcp_write_an_aksv, .read_bksv = intel_hdmi_hdcp_read_bksv, @@ -1127,6 +1311,11 @@ static const struct intel_hdcp_shim intel_hdmi_hdcp_shim = { .read_v_prime_part = intel_hdmi_hdcp_read_v_prime_part, .toggle_signalling = intel_hdmi_hdcp_toggle_signalling, .check_link = intel_hdmi_hdcp_check_link,
- .write_2_2_msg = intel_hdmi_hdcp2_write_msg,
- .read_2_2_msg = intel_hdmi_hdcp2_read_msg,
- .check_2_2_link = intel_hdmi_hdcp2_check_link,
- .hdcp_2_2_capable = intel_hdmi_hdcp2_capable,
- .hdcp_protocol = intel_hdmi_hdcp2_protocol,
};
static void intel_hdmi_prepare(struct intel_encoder *encoder,
2.7.4