diff options
| -rw-r--r-- | drivers/video/tegra/dc/nvhdcp.c | 26 | ||||
| -rw-r--r-- | include/video/nvhdcp.h | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/video/tegra/dc/nvhdcp.c b/drivers/video/tegra/dc/nvhdcp.c index 10c451d9ff74..261d1a877c90 100644 --- a/drivers/video/tegra/dc/nvhdcp.c +++ b/drivers/video/tegra/dc/nvhdcp.c @@ -470,6 +470,20 @@ static int verify_ksv(u64 k) return (i != 20) ? -EINVAL : 0; } +static int get_nvhdcp_state(struct tegra_nvhdcp *nvhdcp, + struct tegra_nvhdcp_packet *pkt) +{ + mutex_lock(&nvhdcp->lock); + if (nvhdcp->state != STATE_LINK_VERIFY) { + memset(pkt, 0, sizeof *pkt); + pkt->packet_results = TEGRA_NVHDCP_RESULT_LINK_FAILED; + } else { + pkt->packet_results = TEGRA_NVHDCP_RESULT_SUCCESS; + } + mutex_unlock(&nvhdcp->lock); + return 0; +} + /* get Status and Kprime signature - READ_S on TMDS0_LINK0 only */ static int get_s_prime(struct tegra_nvhdcp *nvhdcp, struct tegra_nvhdcp_packet *pkt) { @@ -1158,6 +1172,18 @@ static long nvhdcp_dev_ioctl(struct file *filp, case TEGRAIO_NVHDCP_RENEGOTIATE: e = tegra_nvhdcp_renegotiate(nvhdcp); break; + + case TEGRAIO_NVHDCP_HDCP_STATE: + pkt = kmalloc(sizeof(*pkt), GFP_KERNEL); + if (!pkt) + return -ENOMEM; + e = get_nvhdcp_state(nvhdcp, pkt); + if (copy_to_user((void __user *)arg, pkt, sizeof(*pkt))) { + e = -EFAULT; + goto kfree_pkt; + } + kfree(pkt); + return e; } return e; diff --git a/include/video/nvhdcp.h b/include/video/nvhdcp.h index f282ff8caa99..cf27ee50ca27 100644 --- a/include/video/nvhdcp.h +++ b/include/video/nvhdcp.h @@ -87,5 +87,6 @@ struct tegra_nvhdcp_packet { #define TEGRAIO_NVHDCP_READ_M _IOWR('F', 0x73, struct tegra_nvhdcp_packet) #define TEGRAIO_NVHDCP_READ_S _IOWR('F', 0x74, struct tegra_nvhdcp_packet) #define TEGRAIO_NVHDCP_RENEGOTIATE _IO('F', 0x75) +#define TEGRAIO_NVHDCP_HDCP_STATE _IOR('F', 0x76, struct tegra_nvhdcp_packet) #endif |