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drm/rockchip: dw-dp: support hdcp key without aes encrypt

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Change-Id: Ifc6ea0398914855e7c1d90ebf95b0766d70004d4
Signed-off-by: Chen Shunqing <csq@rock-chips.com>
This commit is contained in:
Chen Shunqing
2023-07-07 06:08:45 +00:00
committed by Tao Huang
parent 99697177f4
commit ab1b8c1425
1 changed files with 25 additions and 3 deletions
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28
drivers/gpu/drm/rockchip/dw-dp.c
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@@ -239,9 +239,15 @@
#define DPTX_HDCP22GPIOCHNGSTS 0x362c
#define DPTX_HDCPREG_DPK_CRC 0x3630
#define HDCP_KEY_SIZE 308
#define HDCP_KEY_SEED_SIZE 2
#define HDCP_DATA_SIZE 330
#define DP_HDCP1X_ID 6
#define HDCP_SIG_MAGIC 0x4B534541 /* "AESK" */
#define HDCP_FLG_AES 1
#define DPTX_MAX_REGISTER DPTX_HDCPREG_DPK_CRC
#define SDP_REG_BANK_SIZE 16
@@ -407,6 +413,14 @@ struct dw_dp_state {
int color_format;
};
struct hdcp_key_data_t {
unsigned int signature;
unsigned int length;
unsigned int crc;
unsigned int flags;
unsigned char data[];
};
enum {
DPTX_VM_RGB_6BIT,
DPTX_VM_RGB_8BIT,
@@ -499,6 +513,8 @@ static int dw_dp_hdcp_init_keys(struct dw_dp *dp)
u8 hdcp_vendor_data[HDCP_DATA_SIZE + 1];
void __iomem *base;
struct arm_smccc_res res;
struct hdcp_key_data_t *key_data;
bool aes_encrypt;
regmap_read(dp->regmap, DPTX_HDCPREG_RMLSTS, &val);
if (FIELD_GET(IDPK_DATA_INDEX, val) == 40) {
@@ -507,18 +523,24 @@ static int dw_dp_hdcp_init_keys(struct dw_dp *dp)
}
size = rk_vendor_read(DP_HDCP1X_ID, hdcp_vendor_data, HDCP_DATA_SIZE);
if (size < HDCP_DATA_SIZE) {
dev_info(dp->dev, "HDCP: read size %d\n", size);
if (size < (HDCP_KEY_SIZE + HDCP_KEY_SEED_SIZE)) {
dev_info(dp->dev, "HDCP key read error, size: %d\n", size);
return -EINVAL;
}
key_data = (struct hdcp_key_data_t *)hdcp_vendor_data;
if ((key_data->signature != HDCP_SIG_MAGIC) || !(key_data->flags & HDCP_FLG_AES))
aes_encrypt = false;
else
aes_encrypt = true;
base = sip_hdcp_request_share_memory(dp->id ? DP_TX1 : DP_TX0);
if (!base)
return -ENOMEM;
memcpy_toio(base, hdcp_vendor_data, size);
res = sip_hdcp_config(HDCP_FUNC_KEY_LOAD, dp->id ? DP_TX1 : DP_TX0, 0);
res = sip_hdcp_config(HDCP_FUNC_KEY_LOAD, dp->id ? DP_TX1 : DP_TX0, !aes_encrypt);
if (IS_SIP_ERROR(res.a0)) {
dev_err(dp->dev, "load hdcp key failed\n");
return -EBUSY;