On Fri, Jan 30, 2015 at 2:39 PM, Bjorn Andersson <[email protected]> wrote:
> On Fri, Jan 30, 2015 at 1:51 PM, Bjorn Andersson <[email protected]> wrote:
>> On Tue, Jan 13, 2015 at 12:43 PM, Jilai Wang <[email protected]> wrote:
>>> Add HDMI HDCP support including HDCP PartI/II/III authentication.
>>> V1: Initial Change
>>> V2: Address Bjorn&Rob's comments
>>> Refactor the authentication process to use single work instead
>>> of multiple work for different authentication stages.
>>>
>> Looks cleaner and the SCM parts look good now.
>>
>> But the ddc communication still makes me wonder, see below.
>>
>
> Rob made me aware about the fact that the hdmi driver is both
> implementing a driver for the i2c controller and now for the hdcp
> client and hence doesn't have an i2c_client handle.
>
> So unless this is redesigned to be split in a separate i2c client
> driver we probably have to have the ddc functions like this.
>
> I'm fine with this as is for now.
>
After digging some more in the i2c stack I found others using
i2c_new_dummy() to create a "dummy" i2c client from and adaptor and an
address.
By introducing that we could make hdmi->i2c an actual i2c_client and
use the client api in here.
Regards,
Bjorn
There is one issue to use i2c_smbus_XX functions:
i2c_smbus_read_i2c_block_data has limitation with the maximum count
I2C_SMBUS_BLOCK_MAX.
But in function hdmi_hdcp_recv_ksv_fifo, since the downstream ksv_fifo
size will exceed this limitation and must be read in a single transaction,
we can't use this function then.
> On Fri, Jan 30, 2015 at 2:39 PM, Bjorn Andersson <[email protected]> wrote:
>> On Fri, Jan 30, 2015 at 1:51 PM, Bjorn Andersson <[email protected]> wrote:
>>> On Tue, Jan 13, 2015 at 12:43 PM, Jilai Wang <[email protected]>
>>> wrote:
>>>> Add HDMI HDCP support including HDCP PartI/II/III authentication.
>>>> V1: Initial Change
>>>> V2: Address Bjorn&Rob's comments
>>>> Refactor the authentication process to use single work instead
>>>> of multiple work for different authentication stages.
>>>>
>>> Looks cleaner and the SCM parts look good now.
>>>
>>> But the ddc communication still makes me wonder, see below.
>>>
>>
>> Rob made me aware about the fact that the hdmi driver is both
>> implementing a driver for the i2c controller and now for the hdcp
>> client and hence doesn't have an i2c_client handle.
>>
>> So unless this is redesigned to be split in a separate i2c client
>> driver we probably have to have the ddc functions like this.
>>
>> I'm fine with this as is for now.
>>
>
> After digging some more in the i2c stack I found others using
> i2c_new_dummy() to create a "dummy" i2c client from and adaptor and an
> address.
> By introducing that we could make hdmi->i2c an actual i2c_client and
> use the client api in here.
>
> Regards,
> Bjorn
>
On Wed, Feb 11, 2015 at 10:59 AM, <[email protected]> wrote:
> There is one issue to use i2c_smbus_XX functions:
> i2c_smbus_read_i2c_block_data has limitation with the maximum count
> I2C_SMBUS_BLOCK_MAX.
> But in function hdmi_hdcp_recv_ksv_fifo, since the downstream ksv_fifo
> size will exceed this limitation and must be read in a single transaction,
> we can't use this function then.
>
That's interesting, because we have the same problem in the Synaptics
driver, where we want to read more than 32 bytes with a method that
follows the smbus flow.
Wolfram, do you have any input on making i2c_smbus* functions work for
larger accesses? Or should we just conclude that it's not "smbus" and
open code this in the various places?
Regards,
Bjorn
Add HDMI HDCP support including HDCP PartI/II/III authentication.
V1: Initial Change
V2: Address Bjorn&Rob's comments
Refactor the authentication process to use single work instead
of multiple work for different authentication stages.
V3: Update to align with qcom SCM api.
Signed-off-by: Jilai Wang <[email protected]>
---
drivers/gpu/drm/msm/Makefile | 1 +
drivers/gpu/drm/msm/hdmi/hdmi.c | 45 +-
drivers/gpu/drm/msm/hdmi/hdmi.h | 31 +
drivers/gpu/drm/msm/hdmi/hdmi_audio.c | 1 -
drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 8 +-
drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 7 +-
drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c | 1437 +++++++++++++++++++++++++++++
7 files changed, 1522 insertions(+), 8 deletions(-)
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 674a132..be1f7ff 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -9,6 +9,7 @@ msm-y := \
hdmi/hdmi_audio.o \
hdmi/hdmi_bridge.o \
hdmi/hdmi_connector.o \
+ hdmi/hdmi_hdcp.o \
hdmi/hdmi_i2c.o \
hdmi/hdmi_phy_8960.o \
hdmi/hdmi_phy_8x60.o \
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index 8145362..049723d 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -22,7 +22,9 @@
void hdmi_set_mode(struct hdmi *hdmi, bool power_on)
{
uint32_t ctrl = 0;
+ unsigned long flags;
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
if (power_on) {
ctrl |= HDMI_CTRL_ENABLE;
if (!hdmi->hdmi_mode) {
@@ -37,6 +39,7 @@ void hdmi_set_mode(struct hdmi *hdmi, bool power_on)
}
hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
power_on ? "Enable" : "Disable", ctrl);
}
@@ -51,6 +54,10 @@ static irqreturn_t hdmi_irq(int irq, void *dev_id)
/* Process DDC: */
hdmi_i2c_irq(hdmi->i2c);
+ /* Process HDCP: */
+ if (hdmi->hdcp_ctrl)
+ hdmi_hdcp_irq(hdmi->hdcp_ctrl);
+
/* TODO audio.. */
return IRQ_HANDLED;
@@ -60,6 +67,15 @@ static void hdmi_destroy(struct hdmi *hdmi)
{
struct hdmi_phy *phy = hdmi->phy;
+ /*
+ * at this point, hpd has been disabled,
+ * after flush workq, it's safe to deinit hdcp
+ */
+ if (hdmi->workq) {
+ flush_workqueue(hdmi->workq);
+ destroy_workqueue(hdmi->workq);
+ }
+ hdmi_hdcp_destroy(hdmi);
if (phy)
phy->funcs->destroy(phy);
@@ -77,6 +93,7 @@ static struct hdmi *hdmi_init(struct platform_device *pdev)
{
struct hdmi_platform_config *config = pdev->dev.platform_data;
struct hdmi *hdmi = NULL;
+ struct resource *res;
int i, ret;
hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
@@ -87,6 +104,7 @@ static struct hdmi *hdmi_init(struct platform_device *pdev)
hdmi->pdev = pdev;
hdmi->config = config;
+ spin_lock_init(&hdmi->reg_lock);
/* not sure about which phy maps to which msm.. probably I miss some */
if (config->phy_init)
@@ -107,6 +125,18 @@ static struct hdmi *hdmi_init(struct platform_device *pdev)
goto fail;
}
+ /* HDCP needs physical address of hdmi register */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ config->mmio_name);
+ hdmi->mmio_phy_addr = res->start;
+
+ hdmi->qfprom_mmio = msm_ioremap(pdev,
+ config->qfprom_mmio_name, "HDMI_QFPROM");
+ if (IS_ERR(hdmi->qfprom_mmio)) {
+ dev_info(&pdev->dev, "can't find qfprom resource\n");
+ hdmi->qfprom_mmio = NULL;
+ }
+
hdmi->hpd_regs = devm_kzalloc(&pdev->dev, sizeof(hdmi->hpd_regs[0]) *
config->hpd_reg_cnt, GFP_KERNEL);
if (!hdmi->hpd_regs) {
@@ -189,6 +219,8 @@ static struct hdmi *hdmi_init(struct platform_device *pdev)
hdmi->pwr_clks[i] = clk;
}
+ hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
+
hdmi->i2c = hdmi_i2c_init(hdmi);
if (IS_ERR(hdmi->i2c)) {
ret = PTR_ERR(hdmi->i2c);
@@ -197,6 +229,12 @@ static struct hdmi *hdmi_init(struct platform_device *pdev)
goto fail;
}
+ hdmi->hdcp_ctrl = hdmi_hdcp_init(hdmi);
+ if (IS_ERR(hdmi->hdcp_ctrl)) {
+ dev_warn(&pdev->dev, "failed to init hdcp: disabled\n");
+ hdmi->hdcp_ctrl = NULL;
+ }
+
return hdmi;
fail:
@@ -376,6 +414,7 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
}
hdmi_cfg->mmio_name = "core_physical";
+ hdmi_cfg->qfprom_mmio_name = "qfprom_physical";
hdmi_cfg->ddc_clk_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-clk");
hdmi_cfg->ddc_data_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-data");
hdmi_cfg->hpd_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-hpd");
@@ -391,7 +430,6 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
if (cpu_is_apq8064()) {
static const char *hpd_reg_names[] = {"8921_hdmi_mvs"};
config.phy_init = hdmi_phy_8960_init;
- config.mmio_name = "hdmi_msm_hdmi_addr";
config.hpd_reg_names = hpd_reg_names;
config.hpd_reg_cnt = ARRAY_SIZE(hpd_reg_names);
config.hpd_clk_names = hpd_clk_names;
@@ -404,7 +442,6 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
} else if (cpu_is_msm8960() || cpu_is_msm8960ab()) {
static const char *hpd_reg_names[] = {"8921_hdmi_mvs"};
config.phy_init = hdmi_phy_8960_init;
- config.mmio_name = "hdmi_msm_hdmi_addr";
config.hpd_reg_names = hpd_reg_names;
config.hpd_reg_cnt = ARRAY_SIZE(hpd_reg_names);
config.hpd_clk_names = hpd_clk_names;
@@ -419,7 +456,6 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
"8901_hdmi_mvs", "8901_mpp0"
};
config.phy_init = hdmi_phy_8x60_init;
- config.mmio_name = "hdmi_msm_hdmi_addr";
config.hpd_reg_names = hpd_reg_names;
config.hpd_reg_cnt = ARRAY_SIZE(hpd_reg_names);
config.hpd_clk_names = hpd_clk_names;
@@ -430,6 +466,9 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
config.mux_en_gpio = -1;
config.mux_sel_gpio = -1;
}
+ config.mmio_name = "hdmi_msm_hdmi_addr";
+ config.qfprom_mmio_name = "hdmi_msm_qfprom_addr";
+
hdmi_cfg = &config;
#endif
dev->platform_data = hdmi_cfg;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index 68fdfb3..588f7a6 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -37,6 +37,8 @@ struct hdmi_audio {
int rate;
};
+struct hdmi_hdcp_ctrl;
+
struct hdmi {
struct drm_device *dev;
struct platform_device *pdev;
@@ -51,6 +53,8 @@ struct hdmi {
unsigned long int pixclock;
void __iomem *mmio;
+ void __iomem *qfprom_mmio;
+ phys_addr_t mmio_phy_addr;
struct regulator **hpd_regs;
struct regulator **pwr_regs;
@@ -68,12 +72,25 @@ struct hdmi {
bool hdmi_mode; /* are we in hdmi mode? */
int irq;
+ struct workqueue_struct *workq;
+
+ struct hdmi_hdcp_ctrl *hdcp_ctrl;
+
+ /*
+ * spinlock to protect registers shared by different execution
+ * REG_HDMI_CTRL
+ * REG_HDMI_DDC_ARBITRATION
+ * REG_HDMI_HDCP_INT_CTRL
+ * REG_HDMI_HPD_CTRL
+ */
+ spinlock_t reg_lock;
};
/* platform config data (ie. from DT, or pdata) */
struct hdmi_platform_config {
struct hdmi_phy *(*phy_init)(struct hdmi *hdmi);
const char *mmio_name;
+ const char *qfprom_mmio_name;
/* regulators that need to be on for hpd: */
const char **hpd_reg_names;
@@ -109,6 +126,11 @@ static inline u32 hdmi_read(struct hdmi *hdmi, u32 reg)
return msm_readl(hdmi->mmio + reg);
}
+static inline u32 hdmi_qfprom_read(struct hdmi *hdmi, u32 reg)
+{
+ return msm_readl(hdmi->qfprom_mmio + reg);
+}
+
/*
* The phy appears to be different, for example between 8960 and 8x60,
* so split the phy related functions out and load the correct one at
@@ -163,4 +185,13 @@ void hdmi_i2c_irq(struct i2c_adapter *i2c);
void hdmi_i2c_destroy(struct i2c_adapter *i2c);
struct i2c_adapter *hdmi_i2c_init(struct hdmi *hdmi);
+/*
+ * hdcp
+ */
+struct hdmi_hdcp_ctrl *hdmi_hdcp_init(struct hdmi *hdmi);
+void hdmi_hdcp_destroy(struct hdmi *hdmi);
+void hdmi_hdcp_on(struct hdmi_hdcp_ctrl *hdcp_ctrl);
+void hdmi_hdcp_off(struct hdmi_hdcp_ctrl *hdcp_ctrl);
+void hdmi_hdcp_irq(struct hdmi_hdcp_ctrl *hdcp_ctrl);
+
#endif /* __HDMI_CONNECTOR_H__ */
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_audio.c b/drivers/gpu/drm/msm/hdmi/hdmi_audio.c
index 872485f..df232e2 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_audio.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_audio.c
@@ -203,7 +203,6 @@ int hdmi_audio_update(struct hdmi *hdmi)
audio_config |= HDMI_AUDIO_CFG_FIFO_WATERMARK(4);
audio_config |= HDMI_AUDIO_CFG_ENGINE_ENABLE;
} else {
- hdmi_write(hdmi, REG_HDMI_GC, HDMI_GC_MUTE);
acr_pkt_ctrl &= ~HDMI_ACR_PKT_CTRL_CONT;
acr_pkt_ctrl &= ~HDMI_ACR_PKT_CTRL_SEND;
vbi_pkt_ctrl &= ~HDMI_VBI_PKT_CTRL_GC_ENABLE;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index a7a1d82..1dd093e 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -102,6 +102,9 @@ static void hdmi_bridge_pre_enable(struct drm_bridge *bridge)
phy->funcs->powerup(phy, hdmi->pixclock);
hdmi_set_mode(hdmi, true);
+
+ if (hdmi->hdcp_ctrl)
+ hdmi_hdcp_on(hdmi->hdcp_ctrl);
}
static void hdmi_bridge_enable(struct drm_bridge *bridge)
@@ -118,6 +121,9 @@ static void hdmi_bridge_post_disable(struct drm_bridge *bridge)
struct hdmi *hdmi = hdmi_bridge->hdmi;
struct hdmi_phy *phy = hdmi->phy;
+ if (hdmi->hdcp_ctrl)
+ hdmi_hdcp_off(hdmi->hdcp_ctrl);
+
DBG("power down");
hdmi_set_mode(hdmi, false);
phy->funcs->powerdown(phy);
@@ -142,8 +148,6 @@ static void hdmi_bridge_mode_set(struct drm_bridge *bridge,
hdmi->pixclock = mode->clock * 1000;
- hdmi->hdmi_mode = drm_match_cea_mode(mode) > 1;
-
hstart = mode->htotal - mode->hsync_start;
hend = mode->htotal - mode->hsync_start + mode->hdisplay;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
index b62cdb9..302ba63 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
@@ -140,6 +140,7 @@ static int hpd_enable(struct hdmi_connector *hdmi_connector)
struct hdmi_phy *phy = hdmi->phy;
uint32_t hpd_ctrl;
int i, ret;
+ unsigned long flags;
for (i = 0; i < config->hpd_reg_cnt; i++) {
ret = regulator_enable(hdmi->hpd_regs[i]);
@@ -185,6 +186,7 @@ static int hpd_enable(struct hdmi_connector *hdmi_connector)
HDMI_HPD_INT_CTRL_INT_EN);
/* set timeout to 4.1ms (max) for hardware debounce */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
hpd_ctrl |= HDMI_HPD_CTRL_TIMEOUT(0x1fff);
@@ -193,6 +195,7 @@ static int hpd_enable(struct hdmi_connector *hdmi_connector)
~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
HDMI_HPD_CTRL_ENABLE | hpd_ctrl);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
return 0;
@@ -239,7 +242,6 @@ hotplug_work(struct work_struct *work)
void hdmi_connector_irq(struct drm_connector *connector)
{
struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
- struct msm_drm_private *priv = connector->dev->dev_private;
struct hdmi *hdmi = hdmi_connector->hdmi;
uint32_t hpd_int_status, hpd_int_ctrl;
@@ -263,7 +265,7 @@ void hdmi_connector_irq(struct drm_connector *connector)
hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT;
hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);
- queue_work(priv->wq, &hdmi_connector->hpd_work);
+ queue_work(hdmi->workq, &hdmi_connector->hpd_work);
}
}
@@ -339,6 +341,7 @@ static int hdmi_connector_get_modes(struct drm_connector *connector)
hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
+ hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
drm_mode_connector_update_edid_property(connector, edid);
if (edid) {
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c b/drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c
new file mode 100644
index 0000000..1dc9c34
--- /dev/null
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c
@@ -0,0 +1,1437 @@
+/* Copyright (c) 2010-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include "hdmi.h"
+#include <linux/qcom_scm.h>
+
+#define HDCP_REG_ENABLE 0x01
+#define HDCP_REG_DISABLE 0x00
+#define HDCP_PORT_ADDR 0x74
+
+#define HDCP_INT_STATUS_MASK ( \
+ HDMI_HDCP_INT_CTRL_AUTH_SUCCESS_INT | \
+ HDMI_HDCP_INT_CTRL_AUTH_FAIL_INT | \
+ HDMI_HDCP_INT_CTRL_AUTH_XFER_REQ_INT | \
+ HDMI_HDCP_INT_CTRL_AUTH_XFER_DONE_INT)
+
+#define AUTH_WORK_RETRIES_TIME 100
+#define AUTH_RETRIES_TIME 30
+
+/* QFPROM Registers for HDMI/HDCP */
+#define QFPROM_RAW_FEAT_CONFIG_ROW0_LSB 0x000000F8
+#define QFPROM_RAW_FEAT_CONFIG_ROW0_MSB 0x000000FC
+#define HDCP_KSV_LSB 0x000060D8
+#define HDCP_KSV_MSB 0x000060DC
+
+enum DS_TYPE { /* type of downstream device */
+ DS_UNKNOWN,
+ DS_RECEIVER,
+ DS_REPEATER,
+};
+
+enum hdmi_hdcp_state {
+ HDCP_STATE_NO_AKSV,
+ HDCP_STATE_INACTIVE,
+ HDCP_STATE_AUTHENTICATING,
+ HDCP_STATE_AUTHENTICATED,
+ HDCP_STATE_AUTH_FAILED
+};
+
+struct hdmi_hdcp_reg_data {
+ u32 reg_id;
+ u32 off;
+ char *name;
+ u32 reg_val;
+};
+
+struct hdmi_hdcp_ctrl {
+ struct hdmi *hdmi;
+ u32 auth_retries;
+ bool tz_hdcp;
+ enum hdmi_hdcp_state hdcp_state;
+ struct work_struct hdcp_auth_work;
+ struct work_struct hdcp_reauth_work;
+
+#define AUTH_ABORT_EV 1
+#define AUTH_RESULT_RDY_EV 2
+ unsigned long auth_event;
+ wait_queue_head_t auth_event_queue;
+
+ u32 ksv_fifo_w_index;
+ /*
+ * store aksv from qfprom
+ */
+ u32 aksv_lsb;
+ u32 aksv_msb;
+ bool aksv_valid;
+ u32 ds_type;
+ u32 bksv_lsb;
+ u32 bksv_msb;
+ u8 dev_count;
+ u8 depth;
+ u8 ksv_list[5 * 127];
+ bool max_cascade_exceeded;
+ bool max_dev_exceeded;
+};
+
+static int hdmi_ddc_read(struct hdmi *hdmi, u16 addr, u8 offset,
+ u8 *data, u16 data_len)
+{
+ int rc;
+ int retry = 5;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = addr >> 1,
+ .flags = 0,
+ .len = 1,
+ .buf = &offset,
+ }, {
+ .addr = addr >> 1,
+ .flags = I2C_M_RD,
+ .len = data_len,
+ .buf = data,
+ }
+ };
+
+ DBG("Start DDC read");
+retry:
+ rc = i2c_transfer(hdmi->i2c, msgs, 2);
+
+ retry--;
+ if (rc == 2)
+ rc = 0;
+ else if (retry > 0)
+ goto retry;
+ else
+ rc = -EIO;
+
+ DBG("End DDC read %d", rc);
+
+ return rc;
+}
+
+#define HDCP_DDC_WRITE_MAX_BYTE_NUM 32
+
+static int hdmi_ddc_write(struct hdmi *hdmi, u16 addr, u8 offset,
+ u8 *data, u16 data_len)
+{
+ int rc;
+ int retry = 10;
+ u8 buf[HDCP_DDC_WRITE_MAX_BYTE_NUM];
+ struct i2c_msg msgs[] = {
+ {
+ .addr = addr >> 1,
+ .flags = 0,
+ .len = 1,
+ }
+ };
+
+ DBG("Start DDC write");
+ if (data_len > (HDCP_DDC_WRITE_MAX_BYTE_NUM - 1)) {
+ pr_err("%s: write size too big\n", __func__);
+ return -ERANGE;
+ }
+
+ buf[0] = offset;
+ memcpy(&buf[1], data, data_len);
+ msgs[0].buf = buf;
+ msgs[0].len = data_len + 1;
+retry:
+ rc = i2c_transfer(hdmi->i2c, msgs, 1);
+
+ retry--;
+ if (rc == 1)
+ rc = 0;
+ else if (retry > 0)
+ goto retry;
+ else
+ rc = -EIO;
+
+ DBG("End DDC write %d", rc);
+
+ return rc;
+}
+
+static int hdmi_hdcp_scm_wr(struct hdmi_hdcp_ctrl *hdcp_ctrl, u32 *preg,
+ u32 *pdata, u32 count)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ struct qcom_scm_hdcp_req scm_buf[QCOM_SCM_HDCP_MAX_REQ_CNT];
+ u32 resp, phy_addr, idx = 0;
+ int i, ret = 0;
+
+ WARN_ON(!pdata || !preg || (count == 0));
+
+ if (hdcp_ctrl->tz_hdcp) {
+ phy_addr = (u32)hdmi->mmio_phy_addr;
+
+ while (count) {
+ memset(scm_buf, 0, sizeof(scm_buf));
+ for (i = 0; i < count && i < QCOM_SCM_HDCP_MAX_REQ_CNT;
+ i++) {
+ scm_buf[i].addr = phy_addr + preg[idx];
+ scm_buf[i].val = pdata[idx];
+ idx++;
+ }
+ ret = qcom_scm_hdcp_req(scm_buf, i, &resp);
+
+ if (ret || resp) {
+ pr_err("%s: error: scm_call ret=%d resp=%u\n",
+ __func__, ret, resp);
+ ret = -EINVAL;
+ break;
+ }
+
+ count -= i;
+ }
+ } else {
+ for (i = 0; i < count; i++)
+ hdmi_write(hdmi, preg[i], pdata[i]);
+ }
+
+ return ret;
+}
+
+void hdmi_hdcp_irq(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 reg_val, hdcp_int_status;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_HDCP_INT_CTRL);
+ hdcp_int_status = reg_val & HDCP_INT_STATUS_MASK;
+ if (!hdcp_int_status) {
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+ return;
+ }
+ /* Clear Interrupts */
+ reg_val |= hdcp_int_status << 1;
+ /* Clear AUTH_FAIL_INFO as well */
+ if (hdcp_int_status & HDMI_HDCP_INT_CTRL_AUTH_FAIL_INT)
+ reg_val |= HDMI_HDCP_INT_CTRL_AUTH_FAIL_INFO_ACK;
+ hdmi_write(hdmi, REG_HDMI_HDCP_INT_CTRL, reg_val);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ DBG("hdcp irq %x", hdcp_int_status);
+
+ if (hdcp_int_status & HDMI_HDCP_INT_CTRL_AUTH_SUCCESS_INT) {
+ pr_info("%s:AUTH_SUCCESS_INT received\n", __func__);
+ if (HDCP_STATE_AUTHENTICATING == hdcp_ctrl->hdcp_state) {
+ set_bit(AUTH_RESULT_RDY_EV, &hdcp_ctrl->auth_event);
+ wake_up_all(&hdcp_ctrl->auth_event_queue);
+ }
+ }
+
+ if (hdcp_int_status & HDMI_HDCP_INT_CTRL_AUTH_FAIL_INT) {
+ reg_val = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ pr_info("%s: AUTH_FAIL_INT rcvd, LINK0_STATUS=0x%08x\n",
+ __func__, reg_val);
+ if (HDCP_STATE_AUTHENTICATED == hdcp_ctrl->hdcp_state)
+ queue_work(hdmi->workq, &hdcp_ctrl->hdcp_reauth_work);
+ else if (HDCP_STATE_AUTHENTICATING ==
+ hdcp_ctrl->hdcp_state) {
+ set_bit(AUTH_RESULT_RDY_EV, &hdcp_ctrl->auth_event);
+ wake_up_all(&hdcp_ctrl->auth_event_queue);
+ }
+ }
+}
+
+static int hdmi_hdcp_msleep(struct hdmi_hdcp_ctrl *hdcp_ctrl, u32 ms, u32 ev)
+{
+ int rc;
+
+ rc = wait_event_timeout(hdcp_ctrl->auth_event_queue,
+ !!test_bit(ev, &hdcp_ctrl->auth_event),
+ msecs_to_jiffies(ms));
+ if (rc) {
+ pr_info("%s: msleep is canceled by event %d\n",
+ __func__, ev);
+ clear_bit(ev, &hdcp_ctrl->auth_event);
+ return -ECANCELED;
+ }
+
+ return 0;
+}
+
+static int hdmi_hdcp_read_validate_aksv(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+
+ /* Fetch aksv from QFPROM, this info should be public. */
+ hdcp_ctrl->aksv_lsb = hdmi_qfprom_read(hdmi, HDCP_KSV_LSB);
+ hdcp_ctrl->aksv_msb = hdmi_qfprom_read(hdmi, HDCP_KSV_MSB);
+
+ /* check there are 20 ones in AKSV */
+ if ((hweight32(hdcp_ctrl->aksv_lsb) + hweight32(hdcp_ctrl->aksv_msb))
+ != 20) {
+ pr_err("%s: AKSV QFPROM doesn't have 20 1's, 20 0's\n",
+ __func__);
+ pr_err("%s: QFPROM AKSV chk failed (AKSV=%02x%08x)\n",
+ __func__, hdcp_ctrl->aksv_msb,
+ hdcp_ctrl->aksv_lsb);
+ return -EINVAL;
+ }
+ DBG("AKSV=%02x%08x", hdcp_ctrl->aksv_msb, hdcp_ctrl->aksv_lsb);
+
+ return 0;
+}
+
+static int reset_hdcp_ddc_failures(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 reg_val, failure, nack0;
+ int rc = 0;
+
+ /* Check for any DDC transfer failures */
+ reg_val = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_STATUS);
+ failure = reg_val & HDMI_HDCP_DDC_STATUS_FAILED;
+ nack0 = reg_val & HDMI_HDCP_DDC_STATUS_NACK0;
+ DBG("HDCP_DDC_STATUS=0x%x, FAIL=%d, NACK0=%d",
+ reg_val, failure, nack0);
+
+ if (failure) {
+ /*
+ * Indicates that the last HDCP HW DDC transfer failed.
+ * This occurs when a transfer is attempted with HDCP DDC
+ * disabled (HDCP_DDC_DISABLE=1) or the number of retries
+ * matches HDCP_DDC_RETRY_CNT.
+ * Failure occurred, let's clear it.
+ */
+ DBG("DDC failure detected");
+
+ /* First, Disable DDC */
+ hdmi_write(hdmi, REG_HDMI_HDCP_DDC_CTRL_0,
+ HDMI_HDCP_DDC_CTRL_0_DISABLE);
+
+ /* ACK the Failure to Clear it */
+ reg_val = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_CTRL_1);
+ reg_val |= HDMI_HDCP_DDC_CTRL_1_FAILED_ACK;
+ hdmi_write(hdmi, REG_HDMI_HDCP_DDC_CTRL_1, reg_val);
+
+ /* Check if the FAILURE got Cleared */
+ reg_val = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_STATUS);
+ if (reg_val & HDMI_HDCP_DDC_STATUS_FAILED)
+ pr_info("%s: Unable to clear HDCP DDC Failure\n",
+ __func__);
+
+ /* Re-Enable HDCP DDC */
+ hdmi_write(hdmi, REG_HDMI_HDCP_DDC_CTRL_0, 0);
+ }
+
+ if (nack0) {
+ DBG("Before: HDMI_DDC_SW_STATUS=0x%08x",
+ hdmi_read(hdmi, REG_HDMI_DDC_SW_STATUS));
+ /* Reset HDMI DDC software status */
+ reg_val = hdmi_read(hdmi, REG_HDMI_DDC_CTRL);
+ reg_val |= HDMI_DDC_CTRL_SW_STATUS_RESET;
+ hdmi_write(hdmi, REG_HDMI_DDC_CTRL, reg_val);
+
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 20, AUTH_ABORT_EV);
+
+ reg_val = hdmi_read(hdmi, REG_HDMI_DDC_CTRL);
+ reg_val &= ~HDMI_DDC_CTRL_SW_STATUS_RESET;
+ hdmi_write(hdmi, REG_HDMI_DDC_CTRL, reg_val);
+
+ /* Reset HDMI DDC Controller */
+ reg_val = hdmi_read(hdmi, REG_HDMI_DDC_CTRL);
+ reg_val |= HDMI_DDC_CTRL_SOFT_RESET;
+ hdmi_write(hdmi, REG_HDMI_DDC_CTRL, reg_val);
+
+ /* If previous msleep is aborted, skip this msleep */
+ if (!rc)
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 20, AUTH_ABORT_EV);
+
+ reg_val = hdmi_read(hdmi, REG_HDMI_DDC_CTRL);
+ reg_val &= ~HDMI_DDC_CTRL_SOFT_RESET;
+ hdmi_write(hdmi, REG_HDMI_DDC_CTRL, reg_val);
+ DBG("After: HDMI_DDC_SW_STATUS=0x%08x",
+ hdmi_read(hdmi, REG_HDMI_DDC_SW_STATUS));
+ }
+
+ return rc;
+}
+
+static int hdmi_hdcp_hw_ddc_clean(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc;
+ u32 hdcp_ddc_status, ddc_hw_status;
+ u32 xfer_done, xfer_req, hw_done;
+ bool hw_not_ready;
+ u32 timeout_count;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+
+ if (hdmi_read(hdmi, REG_HDMI_DDC_HW_STATUS) == 0)
+ return 0;
+
+ /* Wait to be clean on DDC HW engine */
+ timeout_count = 100;
+ do {
+ hdcp_ddc_status = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_STATUS);
+ ddc_hw_status = hdmi_read(hdmi, REG_HDMI_DDC_HW_STATUS);
+
+ xfer_done = hdcp_ddc_status & HDMI_HDCP_DDC_STATUS_XFER_DONE;
+ xfer_req = hdcp_ddc_status & HDMI_HDCP_DDC_STATUS_XFER_REQ;
+ hw_done = ddc_hw_status & HDMI_DDC_HW_STATUS_DONE;
+ hw_not_ready = !xfer_done || xfer_req || !hw_done;
+
+ if (hw_not_ready)
+ break;
+
+ timeout_count--;
+ if (!timeout_count) {
+ pr_warn("%s: hw_ddc_clean failed\n", __func__);
+ return -ETIMEDOUT;
+ }
+
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 20, AUTH_ABORT_EV);
+ if (rc)
+ return rc;
+ } while (1);
+
+ return 0;
+}
+
+static void hdmi_hdcp_reauth_work(struct work_struct *work)
+{
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(work,
+ struct hdmi_hdcp_ctrl, hdcp_reauth_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ unsigned long flags;
+ u32 reg_val;
+
+ DBG("HDCP REAUTH WORK");
+ /*
+ * Disable HPD circuitry.
+ * This is needed to reset the HDCP cipher engine so that when we
+ * attempt a re-authentication, HW would clear the AN0_READY and
+ * AN1_READY bits in HDMI_HDCP_LINK0_STATUS register
+ */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
+ reg_val &= ~HDMI_HPD_CTRL_ENABLE;
+ hdmi_write(hdmi, REG_HDMI_HPD_CTRL, reg_val);
+
+ /* Disable HDCP interrupts */
+ hdmi_write(hdmi, REG_HDMI_HDCP_INT_CTRL, 0);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ hdmi_write(hdmi, REG_HDMI_HDCP_RESET,
+ HDMI_HDCP_RESET_LINK0_DEAUTHENTICATE);
+
+ /* Wait to be clean on DDC HW engine */
+ if (hdmi_hdcp_hw_ddc_clean(hdcp_ctrl)) {
+ pr_info("%s: reauth work aborted\n", __func__);
+ return;
+ }
+
+ /* Disable encryption and disable the HDCP block */
+ hdmi_write(hdmi, REG_HDMI_HDCP_CTRL, 0);
+
+ /* Enable HPD circuitry */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
+ reg_val |= HDMI_HPD_CTRL_ENABLE;
+ hdmi_write(hdmi, REG_HDMI_HPD_CTRL, reg_val);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ /*
+ * Only retry defined times then abort current authenticating process
+ */
+ if (++hdcp_ctrl->auth_retries == AUTH_RETRIES_TIME) {
+ hdcp_ctrl->hdcp_state = HDCP_STATE_INACTIVE;
+ hdcp_ctrl->auth_retries = 0;
+ pr_info("%s: abort reauthentication!\n", __func__);
+
+ return;
+ }
+
+ DBG("Queue AUTH WORK");
+ hdcp_ctrl->hdcp_state = HDCP_STATE_AUTHENTICATING;
+ queue_work(hdmi->workq, &hdcp_ctrl->hdcp_auth_work);
+}
+
+static int hdmi_hdcp_auth_prepare(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 link0_status;
+ u32 reg_val;
+ unsigned long flags;
+ int rc;
+
+ if (!hdcp_ctrl->aksv_valid) {
+ rc = hdmi_hdcp_read_validate_aksv(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: ASKV validation failed\n", __func__);
+ hdcp_ctrl->hdcp_state = HDCP_STATE_NO_AKSV;
+ return -ENOTSUPP;
+ }
+ hdcp_ctrl->aksv_valid = true;
+ }
+
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ /* disable HDMI Encrypt */
+ reg_val = hdmi_read(hdmi, REG_HDMI_CTRL);
+ reg_val &= ~HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, reg_val);
+
+ /* Enabling Software DDC */
+ reg_val = hdmi_read(hdmi, REG_HDMI_DDC_ARBITRATION);
+ reg_val &= ~HDMI_DDC_ARBITRATION_HW_ARBITRATION;
+ hdmi_write(hdmi, REG_HDMI_DDC_ARBITRATION, reg_val);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ /*
+ * Write AKSV read from QFPROM to the HDCP registers.
+ * This step is needed for HDCP authentication and must be
+ * written before enabling HDCP.
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_SW_LOWER_AKSV, hdcp_ctrl->aksv_lsb);
+ hdmi_write(hdmi, REG_HDMI_HDCP_SW_UPPER_AKSV, hdcp_ctrl->aksv_msb);
+
+ /*
+ * HDCP setup prior to enabling HDCP_CTRL.
+ * Setup seed values for random number An.
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_ENTROPY_CTRL0, 0xB1FFB0FF);
+ hdmi_write(hdmi, REG_HDMI_HDCP_ENTROPY_CTRL1, 0xF00DFACE);
+
+ /* Disable the RngCipher state */
+ reg_val = hdmi_read(hdmi, REG_HDMI_HDCP_DEBUG_CTRL);
+ reg_val &= ~HDMI_HDCP_DEBUG_CTRL_RNG_CIPHER;
+ hdmi_write(hdmi, REG_HDMI_HDCP_DEBUG_CTRL, reg_val);
+ DBG("HDCP_DEBUG_CTRL=0x%08x",
+ hdmi_read(hdmi, REG_HDMI_HDCP_DEBUG_CTRL));
+
+ /*
+ * Ensure that all register writes are completed before
+ * enabling HDCP cipher
+ */
+ wmb();
+
+ /*
+ * Enable HDCP
+ * This needs to be done as early as possible in order for the
+ * hardware to make An available to read
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_CTRL, HDMI_HDCP_CTRL_ENABLE);
+
+ /*
+ * If we had stale values for the An ready bit, it should most
+ * likely be cleared now after enabling HDCP cipher
+ */
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ DBG("After enabling HDCP Link0_Status=0x%08x", link0_status);
+ if (!(link0_status &
+ (HDMI_HDCP_LINK0_STATUS_AN_0_READY |
+ HDMI_HDCP_LINK0_STATUS_AN_1_READY)))
+ DBG("An not ready after enabling HDCP");
+
+ /* Clear any DDC failures from previous tries before enable HDCP*/
+ rc = reset_hdcp_ddc_failures(hdcp_ctrl);
+
+ return rc;
+}
+
+static void hdmi_hdcp_auth_fail(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 reg_val;
+ unsigned long flags;
+
+ DBG("hdcp auth failed, queue reauth work");
+ /* clear HDMI Encrypt */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_CTRL);
+ reg_val &= ~HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, reg_val);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ hdcp_ctrl->hdcp_state = HDCP_STATE_AUTH_FAILED;
+ queue_work(hdmi->workq, &hdcp_ctrl->hdcp_reauth_work);
+}
+
+static void hdmi_hdcp_auth_done(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 reg_val;
+ unsigned long flags;
+
+ /*
+ * Disable software DDC before going into part3 to make sure
+ * there is no Arbitration between software and hardware for DDC
+ */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_DDC_ARBITRATION);
+ reg_val |= HDMI_DDC_ARBITRATION_HW_ARBITRATION;
+ hdmi_write(hdmi, REG_HDMI_DDC_ARBITRATION, reg_val);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ /* enable HDMI Encrypt */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_CTRL);
+ reg_val |= HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, reg_val);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ hdcp_ctrl->hdcp_state = HDCP_STATE_AUTHENTICATED;
+ hdcp_ctrl->auth_retries = 0;
+}
+
+/*
+ * hdcp authenticating part 1
+ * Wait Key/An ready
+ * Read BCAPS from sink
+ * Write BCAPS and AKSV into HDCP engine
+ * Write An and AKSV to sink
+ * Read BKSV from sink and write into HDCP engine
+ */
+static int hdmi_hdcp_wait_key_an_ready(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 link0_status, keys_state;
+ u32 timeout_count;
+ bool an_ready;
+
+ /* Wait for HDCP keys to be checked and validated */
+ timeout_count = 100;
+ do {
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ keys_state = (link0_status >> 28) & 0x7;
+ if (keys_state == HDCP_KEYS_STATE_VALID)
+ break;
+
+ DBG("Keys not ready(%d). s=%d, l0=%0x08x",
+ timeout_count, keys_state, link0_status);
+
+ timeout_count--;
+ if (!timeout_count) {
+ pr_err("%s: Wait key state timedout", __func__);
+ return -ETIMEDOUT;
+ }
+
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 20, AUTH_ABORT_EV);
+ if (rc)
+ return rc;
+ } while (1);
+
+ timeout_count = 100;
+ do {
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ an_ready = (link0_status & HDMI_HDCP_LINK0_STATUS_AN_0_READY)
+ && (link0_status & HDMI_HDCP_LINK0_STATUS_AN_1_READY);
+ if (an_ready)
+ break;
+
+ DBG("An not ready(%d). l0_status=0x%08x",
+ timeout_count, link0_status);
+
+ timeout_count--;
+ if (!timeout_count) {
+ pr_err("%s: Wait An timedout", __func__);
+ return -ETIMEDOUT;
+ }
+
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 20, AUTH_ABORT_EV);
+ if (rc)
+ return rc;
+ } while (1);
+
+ return 0;
+}
+
+static int hdmi_hdcp_send_aksv_an(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc = 0;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 link0_aksv_0, link0_aksv_1;
+ u32 link0_an[2];
+ u8 aksv[5];
+
+ /* Read An0 and An1 */
+ link0_an[0] = hdmi_read(hdmi, REG_HDMI_HDCP_RCVPORT_DATA5);
+ link0_an[1] = hdmi_read(hdmi, REG_HDMI_HDCP_RCVPORT_DATA6);
+
+ /* Read AKSV */
+ link0_aksv_0 = hdmi_read(hdmi, REG_HDMI_HDCP_RCVPORT_DATA3);
+ link0_aksv_1 = hdmi_read(hdmi, REG_HDMI_HDCP_RCVPORT_DATA4);
+
+ DBG("Link ASKV=%08x%08x", link0_aksv_0, link0_aksv_1);
+ /* Copy An and AKSV to byte arrays for transmission */
+ aksv[0] = link0_aksv_0 & 0xFF;
+ aksv[1] = (link0_aksv_0 >> 8) & 0xFF;
+ aksv[2] = (link0_aksv_0 >> 16) & 0xFF;
+ aksv[3] = (link0_aksv_0 >> 24) & 0xFF;
+ aksv[4] = link0_aksv_1 & 0xFF;
+
+ /* Write An to offset 0x18 */
+ rc = hdmi_ddc_write(hdmi, HDCP_PORT_ADDR, 0x18, (u8 *)link0_an,
+ (u16)sizeof(link0_an));
+ if (rc) {
+ pr_err("%s:An write failed\n", __func__);
+ return rc;
+ }
+ DBG("Link0-An=%08x%08x", link0_an[0], link0_an[1]);
+
+ /* Write AKSV to offset 0x10 */
+ rc = hdmi_ddc_write(hdmi, HDCP_PORT_ADDR, 0x10, aksv, 5);
+ if (rc) {
+ pr_err("%s:AKSV write failed\n", __func__);
+ return rc;
+ }
+ DBG("Link0-AKSV=%02x%08x", link0_aksv_1 & 0xFF, link0_aksv_0);
+
+ return 0;
+}
+
+static int hdmi_hdcp_recv_bksv(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc = 0;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u8 bksv[5];
+ u32 reg[2], data[2];
+
+ /* Read BKSV at offset 0x00 */
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x00, bksv, 5);
+ if (rc) {
+ pr_err("%s:BKSV read failed\n", __func__);
+ return rc;
+ }
+
+ hdcp_ctrl->bksv_lsb = bksv[0] | (bksv[1] << 8) |
+ (bksv[2] << 16) | (bksv[3] << 24);
+ hdcp_ctrl->bksv_msb = bksv[4];
+ DBG(":BKSV=%02x%08x", hdcp_ctrl->bksv_msb, hdcp_ctrl->bksv_lsb);
+
+ /* check there are 20 ones in BKSV */
+ if ((hweight32(hdcp_ctrl->bksv_lsb) + hweight32(hdcp_ctrl->bksv_msb))
+ != 20) {
+ pr_err(": BKSV doesn't have 20 1's and 20 0's\n");
+ pr_err(": BKSV chk fail. BKSV=%02x%02x%02x%02x%02x\n",
+ bksv[4], bksv[3], bksv[2], bksv[1], bksv[0]);
+ return -EINVAL;
+ }
+
+ /* Write BKSV read from sink to HDCP registers */
+ reg[0] = REG_HDMI_HDCP_RCVPORT_DATA0;
+ data[0] = hdcp_ctrl->bksv_lsb;
+ reg[1] = REG_HDMI_HDCP_RCVPORT_DATA1;
+ data[1] = hdcp_ctrl->bksv_msb;
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, reg, data, 2);
+
+ return rc;
+}
+
+static int hdmi_hdcp_recv_bcaps(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc = 0;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 reg, data;
+ u8 bcaps;
+
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x40, &bcaps, 1);
+ if (rc) {
+ pr_err("%s:BCAPS read failed\n", __func__);
+ return rc;
+ }
+ DBG("BCAPS=%02x", bcaps);
+
+ /* receiver (0), repeater (1) */
+ hdcp_ctrl->ds_type = (bcaps & BIT(6)) ? DS_REPEATER : DS_RECEIVER;
+
+ /* Write BCAPS to the hardware */
+ reg = REG_HDMI_HDCP_RCVPORT_DATA12;
+ data = (u32)bcaps;
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, ®, &data, 1);
+
+ return rc;
+}
+
+static int hdmi_hdcp_auth_part1_key_exchange(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ unsigned long flags;
+ int rc;
+
+ /* Wait for AKSV key and An ready */
+ rc = hdmi_hdcp_wait_key_an_ready(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: wait key and an ready failed\n", __func__);
+ return rc;
+ };
+
+ /* Read BCAPS and send to HDCP engine */
+ rc = hdmi_hdcp_recv_bcaps(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: read bcaps error, abort\n", __func__);
+ return rc;
+ }
+
+ /*
+ * 1.1_Features turned off by default.
+ * No need to write AInfo since 1.1_Features is disabled.
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_RCVPORT_DATA4, 0);
+
+ /* Send AKSV and An to sink */
+ rc = hdmi_hdcp_send_aksv_an(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s:An/Aksv write failed\n", __func__);
+ return rc;
+ }
+
+ /* Read BKSV and send to HDCP engine*/
+ rc = hdmi_hdcp_recv_bksv(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s:BKSV Process failed\n", __func__);
+ return rc;
+ }
+
+ /* Enable HDCP interrupts and ack/clear any stale interrupts */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ hdmi_write(hdmi, REG_HDMI_HDCP_INT_CTRL,
+ HDMI_HDCP_INT_CTRL_AUTH_SUCCESS_ACK |
+ HDMI_HDCP_INT_CTRL_AUTH_SUCCESS_MASK |
+ HDMI_HDCP_INT_CTRL_AUTH_FAIL_ACK |
+ HDMI_HDCP_INT_CTRL_AUTH_FAIL_MASK |
+ HDMI_HDCP_INT_CTRL_AUTH_FAIL_INFO_ACK);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ return 0;
+}
+
+/* read R0' from sink and pass it to HDCP engine */
+static int hdmi_hdcp_auth_part1_recv_r0(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ int rc = 0;
+ u8 buf[2];
+
+ /*
+ * HDCP Compliance Test case 1A-01:
+ * Wait here at least 100ms before reading R0'
+ */
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 125, AUTH_ABORT_EV);
+ if (rc)
+ return rc;
+
+ /* Read R0' at offset 0x08 */
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x08, buf, 2);
+ if (rc) {
+ pr_err("%s:R0' read failed\n", __func__);
+ return rc;
+ }
+ DBG("R0'=%02x%02x", buf[1], buf[0]);
+
+ /* Write R0' to HDCP registers and check to see if it is a match */
+ hdmi_write(hdmi, REG_HDMI_HDCP_RCVPORT_DATA2_0,
+ (((u32)buf[1]) << 8) | buf[0]);
+
+ return 0;
+}
+
+/* Wait for authenticating result: R0/R0' are matched or not */
+static int hdmi_hdcp_auth_part1_verify_r0(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 link0_status;
+ int rc;
+
+ /* wait for hdcp irq, 10 sec should be long enough */
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 10000, AUTH_RESULT_RDY_EV);
+ if (!rc) {
+ pr_err("%s: Wait Auth IRQ timeout\n", __func__);
+ return -ETIMEDOUT;
+ }
+
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ if (!(link0_status & HDMI_HDCP_LINK0_STATUS_RI_MATCHES)) {
+ pr_err("%s: Authentication Part I failed\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Enable HDCP Encryption */
+ hdmi_write(hdmi, REG_HDMI_HDCP_CTRL,
+ HDMI_HDCP_CTRL_ENABLE |
+ HDMI_HDCP_CTRL_ENCRYPTION_ENABLE);
+
+ return 0;
+}
+
+static int hdmi_hdcp_recv_check_bstatus(struct hdmi_hdcp_ctrl *hdcp_ctrl,
+ u16 *pbstatus)
+{
+ int rc;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ bool max_devs_exceeded = false, max_cascade_exceeded = false;
+ u32 repeater_cascade_depth = 0, down_stream_devices = 0;
+ u16 bstatus;
+ u8 buf[2];
+
+ /* Read BSTATUS at offset 0x41 */
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x41, buf, 2);
+ if (rc) {
+ pr_err("%s: BSTATUS read failed\n", __func__);
+ goto error;
+ }
+ *pbstatus = bstatus = (buf[1] << 8) | buf[0];
+
+
+ down_stream_devices = bstatus & 0x7F;
+ repeater_cascade_depth = (bstatus >> 8) & 0x7;
+ max_devs_exceeded = (bstatus & BIT(7)) ? true : false;
+ max_cascade_exceeded = (bstatus & BIT(11)) ? true : false;
+
+ if (down_stream_devices == 0) {
+ /*
+ * If no downstream devices are attached to the repeater
+ * then part II fails.
+ * todo: The other approach would be to continue PART II.
+ */
+ pr_err("%s: No downstream devices\n", __func__);
+ rc = -EINVAL;
+ goto error;
+ }
+
+ /*
+ * HDCP Compliance 1B-05:
+ * Check if no. of devices connected to repeater
+ * exceed max_devices_connected from bit 7 of Bstatus.
+ */
+ if (max_devs_exceeded) {
+ pr_err("%s: no. of devs connected exceeds max allowed",
+ __func__);
+ rc = -EINVAL;
+ goto error;
+ }
+
+ /*
+ * HDCP Compliance 1B-06:
+ * Check if no. of cascade connected to repeater
+ * exceed max_cascade_connected from bit 11 of Bstatus.
+ */
+ if (max_cascade_exceeded) {
+ pr_err("%s: no. of cascade conn exceeds max allowed",
+ __func__);
+ rc = -EINVAL;
+ goto error;
+ }
+
+error:
+ hdcp_ctrl->dev_count = down_stream_devices;
+ hdcp_ctrl->max_cascade_exceeded = max_cascade_exceeded;
+ hdcp_ctrl->max_dev_exceeded = max_devs_exceeded;
+ hdcp_ctrl->depth = repeater_cascade_depth;
+ return rc;
+}
+
+static int hdmi_hdcp_auth_part2_wait_ksv_fifo_ready(
+ struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 reg, data;
+ u32 timeout_count;
+ u16 bstatus;
+ u8 bcaps;
+
+ /*
+ * Wait until READY bit is set in BCAPS, as per HDCP specifications
+ * maximum permitted time to check for READY bit is five seconds.
+ */
+ timeout_count = 100;
+ do {
+ /* Read BCAPS at offset 0x40 */
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x40, &bcaps, 1);
+ if (rc) {
+ pr_err("%s: BCAPS read failed\n", __func__);
+ return rc;
+ }
+
+ if (bcaps & BIT(5))
+ break;
+
+ timeout_count--;
+ if (!timeout_count) {
+ pr_err("%s: Wait KSV fifo ready timedout", __func__);
+ return -ETIMEDOUT;
+ }
+
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 20, AUTH_ABORT_EV);
+ if (rc)
+ return rc;
+ } while (1);
+
+ rc = hdmi_hdcp_recv_check_bstatus(hdcp_ctrl, &bstatus);
+ if (rc) {
+ pr_err("%s: bstatus error\n", __func__);
+ return rc;
+ }
+
+ /* Write BSTATUS and BCAPS to HDCP registers */
+ reg = REG_HDMI_HDCP_RCVPORT_DATA12;
+ data = bcaps | (bstatus << 8);
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, ®, &data, 1);
+ if (rc) {
+ pr_err("%s: BSTATUS write failed\n", __func__);
+ return rc;
+ }
+
+ return 0;
+}
+
+/*
+ * hdcp authenticating part 2: 2nd
+ * read ksv fifo from sink
+ * transfer V' from sink to HDCP engine
+ * reset SHA engine
+ */
+static int hdmi_hdcp_transfer_v_h(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ int rc = 0;
+ struct hdmi_hdcp_reg_data reg_data[] = {
+ {REG_HDMI_HDCP_RCVPORT_DATA7, 0x20, "V' H0"},
+ {REG_HDMI_HDCP_RCVPORT_DATA8, 0x24, "V' H1"},
+ {REG_HDMI_HDCP_RCVPORT_DATA9, 0x28, "V' H2"},
+ {REG_HDMI_HDCP_RCVPORT_DATA10, 0x2C, "V' H3"},
+ {REG_HDMI_HDCP_RCVPORT_DATA11, 0x30, "V' H4"},
+ };
+ struct hdmi_hdcp_reg_data *rd;
+ u32 size = ARRAY_SIZE(reg_data);
+ u32 reg[ARRAY_SIZE(reg_data)];
+ u32 data[ARRAY_SIZE(reg_data)];
+ int i;
+
+ for (i = 0; i < size; i++) {
+ rd = ®_data[i];
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR,
+ rd->off, (u8 *)&data[i], (u16)sizeof(data[i]));
+ if (rc) {
+ pr_err("%s: Read %s failed\n", __func__, rd->name);
+ goto error;
+ }
+
+ DBG("%s =%x", rd->name, data[i]);
+ reg[i] = reg_data[i].reg_id;
+ }
+
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, reg, data, size);
+
+error:
+ return rc;
+}
+
+static int hdmi_hdcp_recv_ksv_fifo(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 ksv_bytes;
+
+ ksv_bytes = 5 * hdcp_ctrl->dev_count;
+
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x43,
+ hdcp_ctrl->ksv_list, ksv_bytes);
+ if (rc)
+ pr_err("%s: KSV FIFO read failed\n", __func__);
+
+ return rc;
+}
+
+static int hdmi_hdcp_reset_sha_engine(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ u32 reg[2], data[2];
+ u32 rc = 0;
+
+ reg[0] = REG_HDMI_HDCP_SHA_CTRL;
+ data[0] = HDCP_REG_ENABLE;
+ reg[1] = REG_HDMI_HDCP_SHA_CTRL;
+ data[1] = HDCP_REG_DISABLE;
+
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, reg, data, 2);
+
+ return rc;
+}
+
+static int hdmi_hdcp_auth_part2_recv_ksv_fifo(
+ struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc;
+ u32 timeout_count;
+
+ /*
+ * Read KSV FIFO over DDC
+ * Key Selection vector FIFO Used to pull downstream KSVs
+ * from HDCP Repeaters.
+ * All bytes (DEVICE_COUNT * 5) must be read in a single,
+ * auto incrementing access.
+ * All bytes read as 0x00 for HDCP Receivers that are not
+ * HDCP Repeaters (REPEATER == 0).
+ */
+ timeout_count = 100;
+ do {
+ rc = hdmi_hdcp_recv_ksv_fifo(hdcp_ctrl);
+ if (!rc)
+ break;
+
+ timeout_count--;
+ if (!timeout_count) {
+ pr_err("%s: Recv ksv fifo timedout", __func__);
+ return -ETIMEDOUT;
+ }
+
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 25, AUTH_ABORT_EV);
+ if (rc)
+ return rc;
+ } while (1);
+
+ rc = hdmi_hdcp_transfer_v_h(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: transfer V failed\n", __func__);
+ return rc;
+ }
+
+ /* reset SHA engine before write ksv fifo */
+ rc = hdmi_hdcp_reset_sha_engine(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: fail to reset sha engine\n", __func__);
+ return rc;
+ }
+
+ return 0;
+}
+
+/*
+ * Write KSV FIFO to HDCP_SHA_DATA.
+ * This is done 1 byte at time starting with the LSB.
+ * Once 64 bytes have been written, we need to poll for
+ * HDCP_SHA_BLOCK_DONE before writing any further
+ * If the last byte is written, we need to poll for
+ * HDCP_SHA_COMP_DONE to wait until HW finish
+ */
+static int hdmi_hdcp_write_ksv_fifo(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int i;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 ksv_bytes, last_byte = 0;
+ u8 *ksv_fifo = NULL;
+ u32 reg_val, data, reg;
+ u32 rc = 0;
+
+ ksv_bytes = 5 * hdcp_ctrl->dev_count;
+
+ /* Check if need to wait for HW completion */
+ if (hdcp_ctrl->ksv_fifo_w_index) {
+ reg_val = hdmi_read(hdmi, REG_HDMI_HDCP_SHA_STATUS);
+ DBG("HDCP_SHA_STATUS=%08x", reg_val);
+ if (hdcp_ctrl->ksv_fifo_w_index == ksv_bytes) {
+ /* check COMP_DONE if last write */
+ if (reg_val & HDMI_HDCP_SHA_STATUS_COMP_DONE) {
+ DBG("COMP_DONE");
+ return 0;
+ } else {
+ return -EAGAIN;
+ }
+ } else {
+ /* check BLOCK_DONE if not last write */
+ if (!(reg_val & HDMI_HDCP_SHA_STATUS_BLOCK_DONE))
+ return -EAGAIN;
+
+ DBG("BLOCK_DONE");
+ }
+ }
+
+ ksv_bytes -= hdcp_ctrl->ksv_fifo_w_index;
+ if (ksv_bytes <= 64)
+ last_byte = 1;
+ else
+ ksv_bytes = 64;
+
+ ksv_fifo = hdcp_ctrl->ksv_list;
+ ksv_fifo += hdcp_ctrl->ksv_fifo_w_index;
+
+ for (i = 0; i < ksv_bytes; i++) {
+ /* Write KSV byte and set DONE bit[0] for last byte*/
+ reg_val = ksv_fifo[i] << 16;
+ if ((i == (ksv_bytes - 1)) && last_byte)
+ reg_val |= HDMI_HDCP_SHA_DATA_DONE;
+
+ reg = REG_HDMI_HDCP_SHA_DATA;
+ data = reg_val;
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, ®, &data, 1);
+
+ if (rc)
+ return rc;
+ }
+
+ hdcp_ctrl->ksv_fifo_w_index += ksv_bytes;
+
+ /*
+ *return -EAGAIN to notify caller to wait for COMP_DONE or BLOCK_DONE
+ */
+ return -EAGAIN;
+}
+
+/* write ksv fifo into HDCP engine */
+static int hdmi_hdcp_auth_part2_write_ksv_fifo(
+ struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc;
+ u32 timeout_count;
+
+ hdcp_ctrl->ksv_fifo_w_index = 0;
+ timeout_count = 100;
+ do {
+ rc = hdmi_hdcp_write_ksv_fifo(hdcp_ctrl);
+ if (!rc)
+ break;
+
+ if (rc != -EAGAIN)
+ return rc;
+
+ timeout_count--;
+ if (!timeout_count) {
+ pr_err("%s: Write KSV fifo timedout", __func__);
+ return -ETIMEDOUT;
+ }
+
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 20, AUTH_ABORT_EV);
+ if (rc)
+ return rc;
+ } while (1);
+
+ return 0;
+}
+
+static int hdmi_hdcp_auth_part2_check_v_match(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc = 0;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 link0_status;
+ u32 timeout_count = 100;
+
+ do {
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ if (link0_status & HDMI_HDCP_LINK0_STATUS_V_MATCHES)
+ break;
+
+ timeout_count--;
+ if (!timeout_count) {
+ pr_err("%s: HDCP V Match timedout", __func__);
+ return -ETIMEDOUT;
+ }
+
+ rc = hdmi_hdcp_msleep(hdcp_ctrl, 20, AUTH_ABORT_EV);
+ if (rc)
+ return rc;
+ } while (1);
+
+ return 0;
+}
+
+static void hdmi_hdcp_auth_work(struct work_struct *work)
+{
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(work,
+ struct hdmi_hdcp_ctrl, hdcp_auth_work);
+ int rc;
+
+ rc = hdmi_hdcp_auth_prepare(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: auth prepare failed %d\n", __func__, rc);
+ goto end;
+ }
+
+ /* HDCP PartI */
+ rc = hdmi_hdcp_auth_part1_key_exchange(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: key exchange failed %d\n", __func__, rc);
+ goto end;
+ }
+
+ rc = hdmi_hdcp_auth_part1_recv_r0(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: receive r0 failed %d\n", __func__, rc);
+ goto end;
+ }
+
+ rc = hdmi_hdcp_auth_part1_verify_r0(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: verify r0 failed %d\n", __func__, rc);
+ goto end;
+ }
+ pr_info("%s: Authentication Part I successful\n", __func__);
+ if (hdcp_ctrl->ds_type == DS_RECEIVER)
+ goto end;
+
+ /* HDCP PartII */
+ rc = hdmi_hdcp_auth_part2_wait_ksv_fifo_ready(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: wait ksv fifo ready failed %d\n", __func__, rc);
+ goto end;
+ }
+
+ rc = hdmi_hdcp_auth_part2_recv_ksv_fifo(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: recv ksv fifo failed %d\n", __func__, rc);
+ goto end;
+ }
+
+ rc = hdmi_hdcp_auth_part2_write_ksv_fifo(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: write ksv fifo failed %d\n", __func__, rc);
+ goto end;
+ }
+
+ rc = hdmi_hdcp_auth_part2_check_v_match(hdcp_ctrl);
+ if (rc)
+ pr_err("%s: check v match failed %d\n", __func__, rc);
+
+end:
+ if (rc == -ECANCELED) {
+ pr_info("%s: hdcp authentication canceled\n", __func__);
+ } else if (rc == -ENOTSUPP) {
+ pr_info("%s: hdcp is not supported\n", __func__);
+ } else if (rc) {
+ pr_err("%s: hdcp authentication failed\n", __func__);
+ hdmi_hdcp_auth_fail(hdcp_ctrl);
+ } else {
+ hdmi_hdcp_auth_done(hdcp_ctrl);
+ }
+}
+
+void hdmi_hdcp_on(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ u32 reg_val;
+ unsigned long flags;
+
+ if ((HDCP_STATE_INACTIVE != hdcp_ctrl->hdcp_state) ||
+ (HDCP_STATE_NO_AKSV == hdcp_ctrl->hdcp_state)) {
+ DBG("still active or activating or no askv. returning");
+ return;
+ }
+
+ /* clear HDMI Encrypt */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_CTRL);
+ reg_val &= ~HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, reg_val);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ hdcp_ctrl->auth_event = 0;
+ hdcp_ctrl->hdcp_state = HDCP_STATE_AUTHENTICATING;
+ hdcp_ctrl->auth_retries = 0;
+ queue_work(hdmi->workq, &hdcp_ctrl->hdcp_auth_work);
+}
+
+void hdmi_hdcp_off(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ unsigned long flags;
+ u32 reg_val;
+
+ if ((HDCP_STATE_INACTIVE == hdcp_ctrl->hdcp_state) ||
+ (HDCP_STATE_NO_AKSV == hdcp_ctrl->hdcp_state)) {
+ DBG("hdcp inactive or no aksv. returning");
+ return;
+ }
+
+ /*
+ * Disable HPD circuitry.
+ * This is needed to reset the HDCP cipher engine so that when we
+ * attempt a re-authentication, HW would clear the AN0_READY and
+ * AN1_READY bits in HDMI_HDCP_LINK0_STATUS register
+ */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
+ reg_val &= ~HDMI_HPD_CTRL_ENABLE;
+ hdmi_write(hdmi, REG_HDMI_HPD_CTRL, reg_val);
+
+ /*
+ * Disable HDCP interrupts.
+ * Also, need to set the state to inactive here so that any ongoing
+ * reauth works will know that the HDCP session has been turned off.
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_INT_CTRL, 0);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ /*
+ * Cancel any pending auth/reauth attempts.
+ * If one is ongoing, this will wait for it to finish.
+ * No more reauthentication attempts will be scheduled since we
+ * set the current state to inactive.
+ */
+ set_bit(AUTH_ABORT_EV, &hdcp_ctrl->auth_event);
+ wake_up_all(&hdcp_ctrl->auth_event_queue);
+ cancel_work_sync(&hdcp_ctrl->hdcp_auth_work);
+ cancel_work_sync(&hdcp_ctrl->hdcp_reauth_work);
+
+ hdmi_write(hdmi, REG_HDMI_HDCP_RESET,
+ HDMI_HDCP_RESET_LINK0_DEAUTHENTICATE);
+
+ /* Disable encryption and disable the HDCP block */
+ hdmi_write(hdmi, REG_HDMI_HDCP_CTRL, 0);
+
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ reg_val = hdmi_read(hdmi, REG_HDMI_CTRL);
+ reg_val &= ~HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, reg_val);
+
+ /* Enable HPD circuitry */
+ reg_val = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
+ reg_val |= HDMI_HPD_CTRL_ENABLE;
+ hdmi_write(hdmi, REG_HDMI_HPD_CTRL, reg_val);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ hdcp_ctrl->hdcp_state = HDCP_STATE_INACTIVE;
+
+ DBG("HDCP: Off");
+}
+
+struct hdmi_hdcp_ctrl *hdmi_hdcp_init(struct hdmi *hdmi)
+{
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = NULL;
+
+ if (!hdmi->qfprom_mmio) {
+ pr_err("%s: HDCP is not supported without qfprom\n",
+ __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ hdcp_ctrl = kzalloc(sizeof(*hdcp_ctrl), GFP_KERNEL);
+ if (!hdcp_ctrl)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_WORK(&hdcp_ctrl->hdcp_auth_work, hdmi_hdcp_auth_work);
+ INIT_WORK(&hdcp_ctrl->hdcp_reauth_work, hdmi_hdcp_reauth_work);
+ init_waitqueue_head(&hdcp_ctrl->auth_event_queue);
+ hdcp_ctrl->hdmi = hdmi;
+ hdcp_ctrl->hdcp_state = HDCP_STATE_INACTIVE;
+ hdcp_ctrl->aksv_valid = false;
+
+ if (qcom_scm_hdcp_available())
+ hdcp_ctrl->tz_hdcp = true;
+ else
+ hdcp_ctrl->tz_hdcp = false;
+
+ return hdcp_ctrl;
+}
+
+void hdmi_hdcp_destroy(struct hdmi *hdmi)
+{
+ if (hdmi && hdmi->hdcp_ctrl) {
+ kfree(hdmi->hdcp_ctrl);
+ hdmi->hdcp_ctrl = NULL;
+ }
+}
--
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