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msm: mdss: hdcp_1x: update hdcp state on link integrity failures

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In case of link integrity failures reported by sink, tear down
the hdcp session. Complete any thread waiting for a response
from sink as part of hdcp protocol to avoid unnecessary delays
in starting new hdcp session.

Change-Id: I0afc56e0177ceccf76b717a483584f7ad5055fe1
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>
This commit is contained in:
Ajay Singh Parmar 2016-11-29 15:45:14 -08:00
parent 2be8fc81c3
commit 0fc50c6dd9
1 changed files with 35 additions and 25 deletions
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60
drivers/video/fbdev/msm/mdss_hdcp_1x.c
View file

@ -235,6 +235,7 @@ struct hdcp_1x_ctrl {
u32 tp_msgid;
u32 tz_hdcp;
bool sink_r0_ready;
bool reauth;
enum hdcp_states hdcp_state;
struct HDCP_V2V1_MSG_TOPOLOGY cached_tp;
struct HDCP_V2V1_MSG_TOPOLOGY current_tp;
@ -864,7 +865,7 @@ static int hdcp_1x_authentication_part1(struct hdcp_1x_ctrl *hdcp_ctrl)
timeout_count = wait_for_completion_timeout(
&hdcp_ctrl->sink_r0_available, HZ / 2);
if (!timeout_count) {
if (!timeout_count || hdcp_ctrl->reauth) {
DEV_ERR("sink R0 not ready\n");
rc = -EINVAL;
goto error;
@ -1050,7 +1051,7 @@ static int hdcp_1x_authentication_part2(struct hdcp_1x_ctrl *hdcp_ctrl)
timeout_count = wait_for_completion_timeout(
&hdcp_ctrl->sink_rep_ready, HZ * 5);
if (!timeout_count) {
if (!timeout_count || hdcp_ctrl->reauth) {
DEV_ERR("sink not ready with DS KSV list\n");
rc = -EINVAL;
goto error;
@ -1067,28 +1068,6 @@ static int hdcp_1x_authentication_part2(struct hdcp_1x_ctrl *hdcp_ctrl)
bstatus = buf[1];
bstatus = (bstatus << 8) | buf[0];
if (hdcp_ctrl->tz_hdcp) {
memset(scm_buf, 0x00, sizeof(scm_buf));
/* Write BSTATUS and BCAPS to HDCP registers */
scm_buf[0].addr = phy_addr + reg_set->data12;
scm_buf[0].val = bcaps | (bstatus << 8);
ret = hdcp_scm_call(scm_buf, &resp);
if (ret || resp) {
DEV_ERR("%s: error: scm_call ret = %d, resp = %d\n",
__func__, ret, resp);
rc = -EINVAL;
goto error;
}
} else if (hdcp_ctrl->init_data.sec_access) {
DSS_REG_W(hdcp_ctrl->init_data.hdcp_io,
reg_set->sec_data12,
bcaps | (bstatus << 8));
} else {
DSS_REG_W(io, reg_set->data12, bcaps | (bstatus << 8));
}
down_stream_devices = bstatus & 0x7F;
DEV_DBG("%s: DEVICE_COUNT %d\n", __func__, down_stream_devices);
@ -1159,6 +1138,29 @@ static int hdcp_1x_authentication_part2(struct hdcp_1x_ctrl *hdcp_ctrl)
DEV_ERR("%s: error reading ksv_fifo\n", __func__);
goto error;
}
if (hdcp_ctrl->tz_hdcp) {
memset(scm_buf, 0x00, sizeof(scm_buf));
/* Write BSTATUS and BCAPS to HDCP registers */
scm_buf[0].addr = phy_addr + reg_set->data12;
scm_buf[0].val = bcaps | (bstatus << 8);
ret = hdcp_scm_call(scm_buf, &resp);
if (ret || resp) {
DEV_ERR("%s: error: scm_call ret = %d, resp = %d\n",
__func__, ret, resp);
rc = -EINVAL;
goto error;
}
} else if (hdcp_ctrl->init_data.sec_access) {
DSS_REG_W(hdcp_ctrl->init_data.hdcp_io,
reg_set->sec_data12,
bcaps | (bstatus << 8));
} else {
DSS_REG_W(io, reg_set->data12, bcaps | (bstatus << 8));
}
v_read_retry:
rc = hdcp_1x_transfer_v_h(hdcp_ctrl);
if (rc)
@ -1379,6 +1381,7 @@ static void hdcp_1x_auth_work(struct work_struct *work)
}
hdcp_ctrl->sink_r0_ready = false;
hdcp_ctrl->reauth = false;
io = hdcp_ctrl->init_data.core_io;
/* Enabling Software DDC for HDMI and REF timer for DP */
@ -1890,7 +1893,14 @@ static int hdcp_1x_cp_irq(void *input)
}
if ((buf & BIT(2)) || (buf & BIT(3))) {
DEV_ERR("%s: REAUTH REQUIRED\n", __func__);
DEV_ERR("%s: %s\n", __func__,
buf & BIT(2) ? "LINK_INTEGRITY_FAILURE" :
"REAUTHENTICATION_REQUEST");
hdcp_ctrl->reauth = true;
complete_all(&hdcp_ctrl->sink_rep_ready);
complete_all(&hdcp_ctrl->sink_r0_available);
queue_work(hdcp_ctrl->workq, &hdcp_ctrl->hdcp_int_work);
goto end;