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Message-ID: <20240919091916.1484-2-Hermes.Wu@ite.com.tw>
Date: Thu, 19 Sep 2024 17:19:15 +0800
From: Hermes Wu <Hermes.Wu@....com.tw>
To: Pin-yen Lin <treapking@...omium.org>, Andrzej Hajda <a.hajda@...sung.com>,
Neil Armstrong <narmstrong@...libre.com>,
Robert Foss
<robert.foss@...aro.org>,
Laurent Pinchart
<Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>,
Jernej
Skrabec <jernej.skrabec@...il.com>,
David Airlie <airlied@...il.com>, Daniel
Vetter <daniel@...ll.ch>,
"open list:DRM DRIVERS"
<dri-devel@...ts.freedesktop.org>,
open list <linux-kernel@...r.kernel.org>
CC: Kenneth Hung <Kenneth.hung@....com.tw>,
allen chen
<allen.chen@....corp-partner.google.com>,
Hermes Wu <Hermes.Wu@....com.tw>
Subject: [PATCH v1 1/2] drm/bridge: it6505: HDCP CTS fail on repeater items
From: allen chen <allen.chen@....corp-partner.google.com>
Fix HDCP CTS items on UNIGRAF DPR-100.
Change-Id: I03f0758779f73164c8ae2fdf61e41dc693e27605
Change-Id: Ib7a8fabaeccd56d3bd7c8adc7384a363b0f7b88d
Signed-off-by: Hermes Wu <Hermes.Wu@....com.tw>
---
drivers/gpu/drm/bridge/ite-it6505.c | 152 ++++++++++++++++++----------
1 file changed, 101 insertions(+), 51 deletions(-)
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index 7a4608844de3..cef02c8c363e 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -298,11 +298,11 @@
#define MAX_LANE_COUNT 4
#define MAX_LINK_RATE HBR
#define AUTO_TRAIN_RETRY 3
-#define MAX_HDCP_DOWN_STREAM_COUNT 10
+#define MAX_HDCP_DOWN_STREAM_COUNT 127
#define MAX_CR_LEVEL 0x03
#define MAX_EQ_LEVEL 0x03
#define AUX_WAIT_TIMEOUT_MS 15
-#define AUX_FIFO_MAX_SIZE 32
+#define AUX_FIFO_MAX_SIZE 16
#define PIXEL_CLK_DELAY 1
#define PIXEL_CLK_INVERSE 0
#define ADJUST_PHASE_THRESHOLD 80000
@@ -326,6 +326,9 @@ enum aux_cmd_type {
CMD_AUX_NATIVE_READ = 0x0,
CMD_AUX_NATIVE_WRITE = 0x5,
CMD_AUX_I2C_EDID_READ = 0xB,
+
+ /*extend read ncommand */
+ CMD_AUX_GET_KSV_LIST = 0x10,
};
enum aux_cmd_reply {
@@ -973,7 +976,7 @@ static ssize_t it6505_aux_operation(struct it6505 *it6505,
it6505_set_bits(it6505, REG_AUX_CTRL, AUX_USER_MODE, AUX_USER_MODE);
aux_op_start:
- if (cmd == CMD_AUX_I2C_EDID_READ) {
+ if (cmd == CMD_AUX_I2C_EDID_READ || cmd == CMD_AUX_GET_KSV_LIST) {
/* AUX EDID FIFO has max length of AUX_FIFO_MAX_SIZE bytes. */
size = min_t(size_t, size, AUX_FIFO_MAX_SIZE);
/* Enable AUX FIFO read back and clear FIFO */
@@ -1004,7 +1007,7 @@ static ssize_t it6505_aux_operation(struct it6505 *it6505,
size);
/* Aux Fire */
- it6505_write(it6505, REG_AUX_CMD_REQ, cmd);
+ it6505_write(it6505, REG_AUX_CMD_REQ, (cmd & 0x0F));
ret = it6505_aux_wait(it6505);
if (ret < 0)
@@ -1038,7 +1041,7 @@ static ssize_t it6505_aux_operation(struct it6505 *it6505,
goto aux_op_start;
}
- if (cmd == CMD_AUX_I2C_EDID_READ) {
+ if (cmd == CMD_AUX_I2C_EDID_READ || cmd == CMD_AUX_GET_KSV_LIST) {
for (i = 0; i < size; i++) {
ret = it6505_read(it6505, REG_AUX_DATA_FIFO);
if (ret < 0)
@@ -1063,7 +1066,7 @@ static ssize_t it6505_aux_operation(struct it6505 *it6505,
ret = i;
aux_op_err:
- if (cmd == CMD_AUX_I2C_EDID_READ) {
+ if (cmd == CMD_AUX_I2C_EDID_READ || cmd == CMD_AUX_GET_KSV_LIST) {
/* clear AUX FIFO */
it6505_set_bits(it6505, REG_AUX_CTRL,
AUX_EN_FIFO_READ | CLR_EDID_FIFO,
@@ -1084,18 +1087,25 @@ static ssize_t it6505_aux_do_transfer(struct it6505 *it6505,
size_t size, enum aux_cmd_reply *reply)
{
int i, ret_size, ret = 0, request_size;
+ struct device *dev = &it6505->client->dev;
mutex_lock(&it6505->aux_lock);
- for (i = 0; i < size; i += 4) {
- request_size = min((int)size - i, 4);
+ for (i = 0; i < size; ) {
+ if (cmd == CMD_AUX_I2C_EDID_READ || cmd == CMD_AUX_GET_KSV_LIST)
+ request_size = min((int)size - i, AUX_FIFO_MAX_SIZE);
+ else
+ request_size = min((int)size - i, 4);
+
ret_size = it6505_aux_operation(it6505, cmd, address + i,
buffer + i, request_size,
reply);
+
if (ret_size < 0) {
ret = ret_size;
goto aux_op_err;
}
+ i += request_size;
ret += ret_size;
}
@@ -1186,6 +1196,35 @@ static int it6505_get_edid_block(void *data, u8 *buf, unsigned int block,
return 0;
}
+static int it6505_get_ksvlist(struct it6505 *it6505, u8 *buf, size_t len)
+{
+ int i, request_size, ret;
+ struct device *dev = &it6505->client->dev;
+ enum aux_cmd_reply reply;
+
+ for (i = 0; i < len; ) {
+ request_size = min((int)len - i, 15);
+
+ ret = it6505_aux_do_transfer(it6505, CMD_AUX_GET_KSV_LIST,
+ DP_AUX_HDCP_KSV_FIFO,
+ buf + i, request_size, &reply);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "request_size = %d, ret =%d", request_size, ret);
+ if (ret < 0)
+ return ret;
+
+ i += request_size;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "ksv read cnt = %d down_stream_cnt=%d ", i, i/5);
+
+ for (i = 0 ; i < len; i += 5)
+ DRM_DEV_DEBUG_DRIVER(dev, "ksv[%d] = %02X%02X%02X%02X%02X",
+ i/5, buf[i], buf[i + 1], buf[i + 2], buf[i + 3], buf[i + 4]);
+
+ return len;
+}
+
static void it6505_variable_config(struct it6505 *it6505)
{
it6505->link_rate_bw_code = HBR;
@@ -1927,6 +1966,7 @@ static void it6505_hdcp_part1_auth(struct it6505 *it6505)
it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_START,
HDCP_TRIGGER_START);
+ it6505->is_repeater = (hdcp_bcaps & DP_BCAPS_REPEATER_PRESENT);
it6505->hdcp_status = HDCP_AUTH_GOING;
}
@@ -1963,7 +2003,7 @@ static int it6505_setup_sha1_input(struct it6505 *it6505, u8 *sha1_input)
{
struct device *dev = &it6505->client->dev;
u8 binfo[2];
- int down_stream_count, i, err, msg_count = 0;
+ int down_stream_count, err, msg_count = 0;
err = it6505_get_dpcd(it6505, DP_AUX_HDCP_BINFO, binfo,
ARRAY_SIZE(binfo));
@@ -1989,17 +2029,12 @@ static int it6505_setup_sha1_input(struct it6505 *it6505, u8 *sha1_input)
return 0;
}
- for (i = 0; i < down_stream_count; i++) {
- err = it6505_get_dpcd(it6505, DP_AUX_HDCP_KSV_FIFO +
- (i % 3) * DRM_HDCP_KSV_LEN,
- sha1_input + msg_count,
- DRM_HDCP_KSV_LEN);
- if (err < 0)
- return err;
+ err = it6505_get_ksvlist(it6505, sha1_input, down_stream_count * 5);
+ if (err < 0)
+ return err;
- msg_count += 5;
- }
+ msg_count += down_stream_count * 5;
it6505->hdcp_down_stream_count = down_stream_count;
sha1_input[msg_count++] = binfo[0];
@@ -2027,7 +2062,7 @@ static bool it6505_hdcp_part2_ksvlist_check(struct it6505 *it6505)
{
struct device *dev = &it6505->client->dev;
u8 av[5][4], bv[5][4];
- int i, err;
+ int i, err, retry;
i = it6505_setup_sha1_input(it6505, it6505->sha1_input);
if (i <= 0) {
@@ -2037,21 +2072,28 @@ static bool it6505_hdcp_part2_ksvlist_check(struct it6505 *it6505)
it6505_sha1_digest(it6505, it6505->sha1_input, i, (u8 *)av);
- err = it6505_get_dpcd(it6505, DP_AUX_HDCP_V_PRIME(0), (u8 *)bv,
- sizeof(bv));
+ for (retry = 0; retry < 3; retry++) {
- if (err < 0) {
- dev_err(dev, "Read V' value Fail");
- return false;
- }
+ err = it6505_get_dpcd(it6505, DP_AUX_HDCP_V_PRIME(0), (u8 *)bv,
+ sizeof(bv));
- for (i = 0; i < 5; i++)
- if (bv[i][3] != av[i][0] || bv[i][2] != av[i][1] ||
- bv[i][1] != av[i][2] || bv[i][0] != av[i][3])
- return false;
+ if (err < 0) {
+ dev_err(dev, "Read V' value Fail %d", retry);
+ continue;
+ }
- DRM_DEV_DEBUG_DRIVER(dev, "V' all match!!");
- return true;
+ for (i = 0; i < 5; i++) {
+ if (bv[i][3] != av[i][0] || bv[i][2] != av[i][1] ||
+ bv[i][1] != av[i][2] || bv[i][0] != av[i][3])
+ break;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "V' all match!! %d, %d", retry, i);
+ return true;
+ }
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "V' NOT match!! %d", retry);
+ return false;
}
static void it6505_hdcp_wait_ksv_list(struct work_struct *work)
@@ -2059,7 +2101,7 @@ static void it6505_hdcp_wait_ksv_list(struct work_struct *work)
struct it6505 *it6505 = container_of(work, struct it6505,
hdcp_wait_ksv_list);
struct device *dev = &it6505->client->dev;
- unsigned int timeout = 5000;
+ unsigned int timeout = 2000;
u8 bstatus = 0;
bool ksv_list_check;
@@ -2079,21 +2121,18 @@ static void it6505_hdcp_wait_ksv_list(struct work_struct *work)
if (timeout == 0) {
DRM_DEV_DEBUG_DRIVER(dev, "timeout and ksv list wait failed");
- goto timeout;
+ goto hdcp_ksvlist_fail;
}
ksv_list_check = it6505_hdcp_part2_ksvlist_check(it6505);
DRM_DEV_DEBUG_DRIVER(dev, "ksv list ready, ksv list check %s",
- ksv_list_check ? "pass" : "fail");
- if (ksv_list_check) {
- it6505_set_bits(it6505, REG_HDCP_TRIGGER,
- HDCP_TRIGGER_KSV_DONE, HDCP_TRIGGER_KSV_DONE);
+ ksv_list_check ? "pass" : "fail");
+
+ if (ksv_list_check)
return;
- }
-timeout:
- it6505_set_bits(it6505, REG_HDCP_TRIGGER,
- HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL,
- HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL);
+
+hdcp_ksvlist_fail:
+ it6505_start_hdcp(it6505);
}
static void it6505_hdcp_work(struct work_struct *work)
@@ -2139,7 +2178,7 @@ static void it6505_hdcp_work(struct work_struct *work)
it6505_hdcp_part1_auth(it6505);
}
-static void it6505_show_hdcp_info(struct it6505 *it6505)
+static void it6505_show_hdcp_info(struct it6505 *it6505, bool repeater_info)
{
struct device *dev = &it6505->client->dev;
int i;
@@ -2150,7 +2189,7 @@ static void it6505_show_hdcp_info(struct it6505 *it6505)
DRM_DEV_DEBUG_DRIVER(dev, "bksv = 0x%*ph",
(int)ARRAY_SIZE(it6505->bksvs), it6505->bksvs);
- if (it6505->is_repeater) {
+ if ((repeater_info) && (it6505->is_repeater)) {
DRM_DEV_DEBUG_DRIVER(dev, "hdcp_down_stream_count: %d",
it6505->hdcp_down_stream_count);
DRM_DEV_DEBUG_DRIVER(dev, "sha1_input: 0x%*ph",
@@ -2251,12 +2290,11 @@ static void it6505_link_training_work(struct work_struct *work)
if (ret) {
it6505->auto_train_retry = AUTO_TRAIN_RETRY;
it6505_link_train_ok(it6505);
- return;
} else {
it6505->auto_train_retry--;
+ it6505_dump(it6505);
}
- it6505_dump(it6505);
}
static void it6505_plugged_status_to_codec(struct it6505 *it6505)
@@ -2311,14 +2349,22 @@ static int it6505_process_hpd_irq(struct it6505 *it6505)
DRM_DEV_DEBUG_DRIVER(dev, "dp_irq_vector = 0x%02x", dp_irq_vector);
if (dp_irq_vector & DP_CP_IRQ) {
- it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ,
- HDCP_TRIGGER_CPIRQ);
bstatus = it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS);
if (bstatus < 0)
return bstatus;
DRM_DEV_DEBUG_DRIVER(dev, "Bstatus = 0x%02x", bstatus);
+
+ /*1B-02 ignore when bstatus is 0 */
+ if ((bstatus & DP_BSTATUS_R0_PRIME_READY) &&
+ (it6505->hdcp_status == HDCP_AUTH_GOING))
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ,
+ HDCP_TRIGGER_CPIRQ);
+ else if ((bstatus & (DP_BSTATUS_REAUTH_REQ | DP_BSTATUS_LINK_FAILURE)) &&
+ (it6505->hdcp_status == HDCP_AUTH_DONE))
+ it6505_start_hdcp(it6505);
+
}
ret = drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
@@ -2431,7 +2477,7 @@ static void it6505_irq_hdcp_done(struct it6505 *it6505)
DRM_DEV_DEBUG_DRIVER(dev, "hdcp done interrupt");
it6505->hdcp_status = HDCP_AUTH_DONE;
- it6505_show_hdcp_info(it6505);
+ it6505_show_hdcp_info(it6505, false);
}
static void it6505_irq_hdcp_fail(struct it6505 *it6505)
@@ -2440,7 +2486,7 @@ static void it6505_irq_hdcp_fail(struct it6505 *it6505)
DRM_DEV_DEBUG_DRIVER(dev, "hdcp fail interrupt");
it6505->hdcp_status = HDCP_AUTH_IDLE;
- it6505_show_hdcp_info(it6505);
+ it6505_show_hdcp_info(it6505, true);
it6505_start_hdcp(it6505);
}
@@ -2455,7 +2501,11 @@ static void it6505_irq_hdcp_ksv_check(struct it6505 *it6505)
{
struct device *dev = &it6505->client->dev;
- DRM_DEV_DEBUG_DRIVER(dev, "HDCP event Interrupt");
+ DRM_DEV_DEBUG_DRIVER(dev, "HDCP repeater R0 event Interrupt");
+
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER,
+ HDCP_TRIGGER_KSV_DONE, HDCP_TRIGGER_KSV_DONE);
+
schedule_work(&it6505->hdcp_wait_ksv_list);
}
--
2.34.1
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