rockchip: implement hdcp key decryption feature for rk3399
Decrypt device private keys which transfer from kernel, then stuff it to
DP controller. So that DP driver could start HDCP authentication in
kernel.
Change-Id: If3c2cd99bca811fe5fc30acc88bf5dc1afd7416d
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
diff --git a/plat/rockchip/rk3399/drivers/dp/cdn_dp.c b/plat/rockchip/rk3399/drivers/dp/cdn_dp.c
index 9fc623b..d0e5986 100644
--- a/plat/rockchip/rk3399/drivers/dp/cdn_dp.c
+++ b/plat/rockchip/rk3399/drivers/dp/cdn_dp.c
@@ -4,7 +4,10 @@
* SPDX-License-Identifier: BSD-3-Clause
*/
+#include <cdn_dp.h>
+#include <smcc.h>
#include <stdlib.h>
+#include <string.h>
__asm__(
".pushsection .text.hdcp_handler, \"ax\", %progbits\n"
@@ -17,3 +20,46 @@
".popsection\n"
);
+static uint64_t *hdcp_key_pdata;
+static struct cdn_dp_hdcp_key_1x key;
+
+int hdcp_handler(struct cdn_dp_hdcp_key_1x *key);
+
+uint64_t dp_hdcp_ctrl(uint64_t type)
+{
+ switch (type) {
+ case HDCP_KEY_DATA_START_TRANSFER:
+ memset(&key, 0x00, sizeof(key));
+ hdcp_key_pdata = (uint64_t *)&key;
+ return 0;
+ case HDCP_KEY_DATA_START_DECRYPT:
+ if (hdcp_key_pdata == (uint64_t *)(&key + 1))
+ return hdcp_handler(&key);
+ else
+ return PSCI_E_INVALID_PARAMS;
+ default:
+ return SMC_UNK;
+ }
+}
+
+uint64_t dp_hdcp_store_key(uint64_t x1,
+ uint64_t x2,
+ uint64_t x3,
+ uint64_t x4,
+ uint64_t x5,
+ uint64_t x6)
+{
+ if (hdcp_key_pdata < (uint64_t *)&key ||
+ hdcp_key_pdata + 6 > (uint64_t *)(&key + 1))
+ return PSCI_E_INVALID_PARAMS;
+
+ hdcp_key_pdata[0] = x1;
+ hdcp_key_pdata[1] = x2;
+ hdcp_key_pdata[2] = x3;
+ hdcp_key_pdata[3] = x4;
+ hdcp_key_pdata[4] = x5;
+ hdcp_key_pdata[5] = x6;
+ hdcp_key_pdata += 6;
+
+ return 0;
+}