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drm/radeon/kms: improve aux error handling

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Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2011-05-20 04:34:24 -04:00 committed by Dave Airlie
parent f8d0edde15
commit 834b2904bb
2 changed files with 151 additions and 85 deletions
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234
drivers/gpu/drm/radeon/atombios_dp.c
View File

@ -327,23 +327,23 @@ union aux_channel_transaction {
};
/* radeon aux chan functions */
bool radeon_process_aux_ch(struct radeon_i2c_chan *chan, u8 *req_bytes,
int num_bytes, u8 *read_byte,
u8 read_buf_len, u8 delay)
static int radeon_process_aux_ch(struct radeon_i2c_chan *chan,
u8 *send, int send_bytes,
u8 *recv, int recv_size,
u8 delay, u8 *ack)
{
struct drm_device *dev = chan->dev;
struct radeon_device *rdev = dev->dev_private;
union aux_channel_transaction args;
int index = GetIndexIntoMasterTable(COMMAND, ProcessAuxChannelTransaction);
unsigned char *base;
int retry_count = 0;
int recv_bytes;
memset(&args, 0, sizeof(args));
base = (unsigned char *)rdev->mode_info.atom_context->scratch;
retry:
memcpy(base, req_bytes, num_bytes);
memcpy(base, send, send_bytes);
args.v1.lpAuxRequest = 0;
args.v1.lpDataOut = 16;
@ -355,75 +355,103 @@ bool radeon_process_aux_ch(struct radeon_i2c_chan *chan, u8 *req_bytes,
atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
if (args.v1.ucReplyStatus && !args.v1.ucDataOutLen) {
if (args.v1.ucReplyStatus == 0x20 && retry_count++ < 10)
goto retry;
DRM_DEBUG_KMS("failed to get auxch %02x%02x %02x %02x 0x%02x %02x after %d retries\n",
req_bytes[1], req_bytes[0], req_bytes[2], req_bytes[3],
chan->rec.i2c_id, args.v1.ucReplyStatus, retry_count);
return false;
*ack = args.v1.ucReplyStatus;
/* timeout */
if (args.v1.ucReplyStatus == 1) {
DRM_DEBUG_KMS("dp_aux_ch timeout\n");
return -ETIMEDOUT;
}
if (args.v1.ucDataOutLen && read_byte && read_buf_len) {
if (read_buf_len < args.v1.ucDataOutLen) {
DRM_ERROR("Buffer to small for return answer %d %d\n",
read_buf_len, args.v1.ucDataOutLen);
return false;
}
{
int len = min(read_buf_len, args.v1.ucDataOutLen);
memcpy(read_byte, base + 16, len);
}
/* flags not zero */
if (args.v1.ucReplyStatus == 2) {
DRM_DEBUG_KMS("dp_aux_ch flags not zero\n");
return -EBUSY;
}
return true;
/* error */
if (args.v1.ucReplyStatus == 3) {
DRM_DEBUG_KMS("dp_aux_ch error\n");
return -EIO;
}
recv_bytes = args.v1.ucDataOutLen;
if (recv_bytes > recv_size)
recv_bytes = recv_size;
if (recv && recv_size)
memcpy(recv, base + 16, recv_bytes);
return recv_bytes;
}
bool radeon_dp_aux_native_write(struct radeon_connector *radeon_connector, uint16_t address,
uint8_t send_bytes, uint8_t *send)
static int radeon_dp_aux_native_write(struct radeon_connector *radeon_connector,
u16 address, u8 *send, u8 send_bytes, u8 delay)
{
struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
int ret;
u8 msg[20];
u8 msg_len, dp_msg_len;
bool ret;
int msg_bytes = send_bytes + 4;
u8 ack;
if (send_bytes > 16)
return -1;
dp_msg_len = 4;
msg[0] = address;
msg[1] = address >> 8;
msg[2] = AUX_NATIVE_WRITE << 4;
dp_msg_len += send_bytes;
msg[3] = (dp_msg_len << 4) | (send_bytes - 1);
if (send_bytes > 16)
return false;
msg[3] = (msg_bytes << 4) | (send_bytes - 1);
memcpy(&msg[4], send, send_bytes);
msg_len = 4 + send_bytes;
ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus, msg, msg_len, NULL, 0, 0);
return ret;
while (1) {
ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus,
msg, msg_bytes, NULL, 0, delay, &ack);
if (ret < 0)
return ret;
if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK)
break;
else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
udelay(400);
else
return -EIO;
}
return send_bytes;
}
bool radeon_dp_aux_native_read(struct radeon_connector *radeon_connector, uint16_t address,
uint8_t delay, uint8_t expected_bytes,
uint8_t *read_p)
static int radeon_dp_aux_native_read(struct radeon_connector *radeon_connector,
u16 address, u8 *recv, int recv_bytes, u8 delay)
{
struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
u8 msg[20];
u8 msg_len, dp_msg_len;
bool ret = false;
msg_len = 4;
dp_msg_len = 4;
u8 msg[4];
int msg_bytes = 4;
u8 ack;
int ret;
msg[0] = address;
msg[1] = address >> 8;
msg[2] = AUX_NATIVE_READ << 4;
msg[3] = (dp_msg_len) << 4;
msg[3] |= expected_bytes - 1;
msg[3] = (msg_bytes << 4) | (recv_bytes - 1);
ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus, msg, msg_len, read_p, expected_bytes, delay);
return ret;
while (1) {
ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus,
msg, msg_bytes, recv, recv_bytes, delay, &ack);
if (ret == 0)
return -EPROTO;
if (ret < 0)
return ret;
if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK)
return ret;
else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
udelay(400);
else
return -EIO;
}
}
/* radeon dp functions */
static u8 radeon_dp_encoder_service(struct radeon_device *rdev, int action, int dp_clock,
static u8 radeon_dp_encoder_service(struct radeon_device *rdev,
int action, int dp_clock,
uint8_t ucconfig, uint8_t lane_num)
{
DP_ENCODER_SERVICE_PARAMETERS args;
@ -456,8 +484,8 @@ bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector)
u8 msg[25];
int ret;
ret = radeon_dp_aux_native_read(radeon_connector, DP_DPCD_REV, 0, 8, msg);
if (ret) {
ret = radeon_dp_aux_native_read(radeon_connector, DP_DPCD_REV, msg, 8, 0);
if (ret > 0) {
memcpy(dig_connector->dpcd, msg, 8);
{
int i;
@ -505,9 +533,9 @@ static bool atom_dp_get_link_status(struct radeon_connector *radeon_connector,
u8 link_status[DP_LINK_STATUS_SIZE])
{
int ret;
ret = radeon_dp_aux_native_read(radeon_connector, DP_LANE0_1_STATUS, 100,
DP_LINK_STATUS_SIZE, link_status);
if (!ret) {
ret = radeon_dp_aux_native_read(radeon_connector, DP_LANE0_1_STATUS,
link_status, DP_LINK_STATUS_SIZE, 100);
if (ret <= 0) {
DRM_ERROR("displayport link status failed\n");
return false;
}
@ -535,22 +563,22 @@ static void dp_set_power(struct radeon_connector *radeon_connector, u8 power_sta
struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
if (dig_connector->dpcd[0] >= 0x11) {
radeon_dp_aux_native_write(radeon_connector, DP_SET_POWER, 1,
&power_state);
radeon_dp_aux_native_write(radeon_connector, DP_SET_POWER,
&power_state, 1, 0);
}
}
static void dp_set_downspread(struct radeon_connector *radeon_connector, u8 downspread)
{
radeon_dp_aux_native_write(radeon_connector, DP_DOWNSPREAD_CTRL, 1,
&downspread);
radeon_dp_aux_native_write(radeon_connector, DP_DOWNSPREAD_CTRL,
&downspread, 1, 0);
}
static void dp_set_link_bw_lanes(struct radeon_connector *radeon_connector,
u8 link_configuration[DP_LINK_CONFIGURATION_SIZE])
{
radeon_dp_aux_native_write(radeon_connector, DP_LINK_BW_SET, 2,
link_configuration);
radeon_dp_aux_native_write(radeon_connector, DP_LINK_BW_SET,
link_configuration, 2, 0);
}
static void dp_update_dpvs_emph(struct radeon_connector *radeon_connector,
@ -566,14 +594,14 @@ static void dp_update_dpvs_emph(struct radeon_connector *radeon_connector,
i, train_set[i]);
radeon_dp_aux_native_write(radeon_connector, DP_TRAINING_LANE0_SET,
dig_connector->dp_lane_count, train_set);
train_set, dig_connector->dp_lane_count, 0);
}
static void dp_set_training(struct radeon_connector *radeon_connector,
u8 training)
{
radeon_dp_aux_native_write(radeon_connector, DP_TRAINING_PATTERN_SET,
1, &training);
&training, 1, 0);
}
void dp_link_train(struct drm_encoder *encoder,
@ -756,16 +784,18 @@ void dp_link_train(struct drm_encoder *encoder,
}
int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
uint8_t write_byte, uint8_t *read_byte)
u8 write_byte, u8 *read_byte)
{
struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
struct radeon_i2c_chan *auxch = (struct radeon_i2c_chan *)adapter;
int ret = 0;
uint16_t address = algo_data->address;
uint8_t msg[5];
uint8_t reply[2];
int msg_len, dp_msg_len;
int reply_bytes;
u16 address = algo_data->address;
u8 msg[5];
u8 reply[2];
unsigned retry;
int msg_bytes;
int reply_bytes = 1;
int ret;
u8 ack;
/* Set up the command byte */
if (mode & MODE_I2C_READ)
@ -779,31 +809,67 @@ int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
msg[0] = address;
msg[1] = address >> 8;
reply_bytes = 1;
msg_len = 4;
dp_msg_len = 3;
switch (mode) {
case MODE_I2C_WRITE:
msg_bytes = 5;
msg[3] = msg_bytes << 4;
msg[4] = write_byte;
msg_len++;
dp_msg_len += 2;
break;
case MODE_I2C_READ:
dp_msg_len += 1;
msg_bytes = 4;
msg[3] = msg_bytes << 4;
break;
default:
msg_bytes = 4;
msg[3] = 3 << 4;
break;
}
msg[3] = (dp_msg_len) << 4;
ret = radeon_process_aux_ch(auxch, msg, msg_len, reply, reply_bytes, 0);
for (retry = 0; retry < 4; retry++) {
ret = radeon_process_aux_ch(auxch,
msg, msg_bytes, reply, reply_bytes, 0, &ack);
if (ret < 0) {
DRM_DEBUG_KMS("aux_ch failed %d\n", ret);
return ret;
}
if (ret) {
if (read_byte)
*read_byte = reply[0];
return reply_bytes;
switch (ack & AUX_NATIVE_REPLY_MASK) {
case AUX_NATIVE_REPLY_ACK:
/* I2C-over-AUX Reply field is only valid
* when paired with AUX ACK.
*/
break;
case AUX_NATIVE_REPLY_NACK:
DRM_DEBUG_KMS("aux_ch native nack\n");
return -EREMOTEIO;
case AUX_NATIVE_REPLY_DEFER:
DRM_DEBUG_KMS("aux_ch native defer\n");
udelay(400);
continue;
default:
DRM_ERROR("aux_ch invalid native reply 0x%02x\n", ack);
return -EREMOTEIO;
}
switch (ack & AUX_I2C_REPLY_MASK) {
case AUX_I2C_REPLY_ACK:
if (mode == MODE_I2C_READ)
*read_byte = reply[0];
return ret;
case AUX_I2C_REPLY_NACK:
DRM_DEBUG_KMS("aux_i2c nack\n");
return -EREMOTEIO;
case AUX_I2C_REPLY_DEFER:
DRM_DEBUG_KMS("aux_i2c defer\n");
udelay(400);
break;
default:
DRM_ERROR("aux_i2c invalid reply 0x%02x\n", ack);
return -EREMOTEIO;
}
}
DRM_ERROR("aux i2c too many retries, giving up\n");
return -EREMOTEIO;
}

2
drivers/gpu/drm/radeon/radeon_mode.h
View File

@ -484,7 +484,7 @@ extern void atombios_dig_transmitter_setup(struct drm_encoder *encoder,
int action, uint8_t lane_num,
uint8_t lane_set);
extern int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
uint8_t write_byte, uint8_t *read_byte);
u8 write_byte, u8 *read_byte);
extern void radeon_i2c_init(struct radeon_device *rdev);
extern void radeon_i2c_fini(struct radeon_device *rdev);