diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce/dce_aux.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_aux.c | 1123 |
1 files changed, 578 insertions, 545 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c index aaeb7faac0c4..673bb87d2c17 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c @@ -24,8 +24,12 @@ */ #include "dm_services.h" +#include "core_types.h" #include "dce_aux.h" #include "dce/dce_11_0_sh_mask.h" +#include "dm_event_log.h" +#include "dm_helpers.h" +#include "dmub/inc/dmub_cmd.h" #define CTX \ aux110->base.ctx @@ -35,23 +39,44 @@ #define DC_LOGGER \ engine->ctx->logger +#define DC_TRACE_LEVEL_MESSAGE(...) do { } while (0) +#define IS_DC_I2CAUX_LOGGING_ENABLED() (false) +#define LOG_FLAG_Error_I2cAux LOG_ERROR +#define LOG_FLAG_I2cAux_DceAux LOG_I2C_AUX + #include "reg_helper.h" +#undef FN +#define FN(reg_name, field_name) \ + aux110->shift->field_name, aux110->mask->field_name + #define FROM_AUX_ENGINE(ptr) \ container_of((ptr), struct aux_engine_dce110, base) #define FROM_ENGINE(ptr) \ - FROM_AUX_ENGINE(container_of((ptr), struct aux_engine, base)) + FROM_AUX_ENGINE(container_of((ptr), struct dce_aux, base)) #define FROM_AUX_ENGINE_ENGINE(ptr) \ - container_of((ptr), struct aux_engine, base) + container_of((ptr), struct dce_aux, base) enum { AUX_INVALID_REPLY_RETRY_COUNTER = 1, AUX_TIMED_OUT_RETRY_COUNTER = 2, AUX_DEFER_RETRY_COUNTER = 6 }; + +#define TIME_OUT_INCREMENT 1016 +#define TIME_OUT_MULTIPLIER_8 8 +#define TIME_OUT_MULTIPLIER_16 16 +#define TIME_OUT_MULTIPLIER_32 32 +#define TIME_OUT_MULTIPLIER_64 64 +#define MAX_TIMEOUT_LENGTH 127 +#define DEFAULT_AUX_ENGINE_MULT 0 +#define DEFAULT_AUX_ENGINE_LENGTH 69 + +#define DC_TRACE_LEVEL_MESSAGE(...) do { } while (0) + static void release_engine( - struct aux_engine *engine) + struct dce_aux *engine) { struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); @@ -59,14 +84,15 @@ static void release_engine( engine->ddc = NULL; - REG_UPDATE(AUX_ARB_CONTROL, AUX_SW_DONE_USING_AUX_REG, 1); + REG_UPDATE_2(AUX_ARB_CONTROL, AUX_SW_DONE_USING_AUX_REG, 1, + AUX_SW_USE_AUX_REG_REQ, 0); } #define SW_CAN_ACCESS_AUX 1 #define DMCU_CAN_ACCESS_AUX 2 static bool is_engine_available( - struct aux_engine *engine) + struct dce_aux *engine) { struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); @@ -79,7 +105,7 @@ static bool is_engine_available( return (field != DMCU_CAN_ACCESS_AUX); } static bool acquire_engine( - struct aux_engine *engine) + struct dce_aux *engine) { struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); @@ -155,7 +181,7 @@ static bool acquire_engine( (0xFF & (address)) static void submit_channel_request( - struct aux_engine *engine, + struct dce_aux *engine, struct aux_request_transaction_data *request) { struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); @@ -170,25 +196,31 @@ static void submit_channel_request( (request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT))); if (REG(AUXN_IMPCAL)) { /* clear_aux_error */ - REG_UPDATE_SEQ(AUXN_IMPCAL, AUXN_CALOUT_ERROR_AK, - 1, - 0); + REG_UPDATE_SEQ_2(AUXN_IMPCAL, + AUXN_CALOUT_ERROR_AK, 1, + AUXN_CALOUT_ERROR_AK, 0); - REG_UPDATE_SEQ(AUXP_IMPCAL, AUXP_CALOUT_ERROR_AK, - 1, - 0); + REG_UPDATE_SEQ_2(AUXP_IMPCAL, + AUXP_CALOUT_ERROR_AK, 1, + AUXP_CALOUT_ERROR_AK, 0); /* force_default_calibrate */ - REG_UPDATE_1BY1_2(AUXN_IMPCAL, + REG_UPDATE_SEQ_2(AUXN_IMPCAL, AUXN_IMPCAL_ENABLE, 1, AUXN_IMPCAL_OVERRIDE_ENABLE, 0); /* bug? why AUXN update EN and OVERRIDE_EN 1 by 1 while AUX P toggles OVERRIDE? */ - REG_UPDATE_SEQ(AUXP_IMPCAL, AUXP_IMPCAL_OVERRIDE_ENABLE, - 1, - 0); + REG_UPDATE_SEQ_2(AUXP_IMPCAL, + AUXP_IMPCAL_OVERRIDE_ENABLE, 1, + AUXP_IMPCAL_OVERRIDE_ENABLE, 0); } + + REG_UPDATE(AUX_INTERRUPT_CONTROL, AUX_SW_DONE_ACK, 1); + + REG_WAIT(AUX_SW_STATUS, AUX_SW_DONE, 0, + 10, aux110->polling_timeout_period/10); + /* set the delay and the number of bytes to write */ /* The length include @@ -241,13 +273,12 @@ static void submit_channel_request( } } - REG_UPDATE(AUX_INTERRUPT_CONTROL, AUX_SW_DONE_ACK, 1); - REG_WAIT(AUX_SW_STATUS, AUX_SW_DONE, 0, - 10, aux110->timeout_period/10); REG_UPDATE(AUX_SW_CONTROL, AUX_SW_GO, 1); + EVENT_LOG_AUX_REQ(engine->ddc->pin_data->en, EVENT_LOG_AUX_ORIGIN_NATIVE, + request->action, request->address, request->length, request->data); } -static int read_channel_reply(struct aux_engine *engine, uint32_t size, +static int read_channel_reply(struct dce_aux *engine, uint32_t size, uint8_t *buffer, uint8_t *reply_result, uint32_t *sw_status) { @@ -266,14 +297,15 @@ static int read_channel_reply(struct aux_engine *engine, uint32_t size, if (!bytes_replied) return -1; - REG_UPDATE_1BY1_3(AUX_SW_DATA, + REG_UPDATE_SEQ_3(AUX_SW_DATA, AUX_SW_INDEX, 0, AUX_SW_AUTOINCREMENT_DISABLE, 1, AUX_SW_DATA_RW, 1); REG_GET(AUX_SW_DATA, AUX_SW_DATA, &reply_result_32); reply_result_32 = reply_result_32 >> 4; - *reply_result = (uint8_t)reply_result_32; + if (reply_result != NULL) + *reply_result = (uint8_t)reply_result_32; if (reply_result_32 == 0) { /* ACK */ uint32_t i = 0; @@ -299,61 +331,8 @@ static int read_channel_reply(struct aux_engine *engine, uint32_t size, return 0; } -static void process_channel_reply( - struct aux_engine *engine, - struct aux_reply_transaction_data *reply) -{ - int bytes_replied; - uint8_t reply_result; - uint32_t sw_status; - - bytes_replied = read_channel_reply(engine, reply->length, reply->data, - &reply_result, &sw_status); - - /* in case HPD is LOW, exit AUX transaction */ - if ((sw_status & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK)) { - reply->status = AUX_TRANSACTION_REPLY_HPD_DISCON; - return; - } - - if (bytes_replied < 0) { - /* Need to handle an error case... - * Hopefully, upper layer function won't call this function if - * the number of bytes in the reply was 0, because there was - * surely an error that was asserted that should have been - * handled for hot plug case, this could happens - */ - if (!(sw_status & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK)) { - reply->status = AUX_TRANSACTION_REPLY_INVALID; - ASSERT_CRITICAL(false); - return; - } - } else { - - switch (reply_result) { - case 0: /* ACK */ - reply->status = AUX_TRANSACTION_REPLY_AUX_ACK; - break; - case 1: /* NACK */ - reply->status = AUX_TRANSACTION_REPLY_AUX_NACK; - break; - case 2: /* DEFER */ - reply->status = AUX_TRANSACTION_REPLY_AUX_DEFER; - break; - case 4: /* AUX ACK / I2C NACK */ - reply->status = AUX_TRANSACTION_REPLY_I2C_NACK; - break; - case 8: /* AUX ACK / I2C DEFER */ - reply->status = AUX_TRANSACTION_REPLY_I2C_DEFER; - break; - default: - reply->status = AUX_TRANSACTION_REPLY_INVALID; - } - } -} - -static enum aux_channel_operation_result get_channel_status( - struct aux_engine *engine, +static enum aux_return_code_type get_channel_status( + struct dce_aux *engine, uint8_t *returned_bytes) { struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); @@ -363,17 +342,18 @@ static enum aux_channel_operation_result get_channel_status( if (returned_bytes == NULL) { /*caller pass NULL pointer*/ ASSERT_CRITICAL(false); - return AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN; + return AUX_RET_ERROR_UNKNOWN; } *returned_bytes = 0; /* poll to make sure that SW_DONE is asserted */ - value = REG_WAIT(AUX_SW_STATUS, AUX_SW_DONE, 1, - 10, aux110->timeout_period/10); + REG_WAIT(AUX_SW_STATUS, AUX_SW_DONE, 1, + 10, aux110->polling_timeout_period/10); + value = REG_READ(AUX_SW_STATUS); /* in case HPD is LOW, exit AUX transaction */ if ((value & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK)) - return AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON; + return AUX_RET_ERROR_HPD_DISCON; /* Note that the following bits are set in 'status.bits' * during CTS 4.2.1.2 (FW 3.3.1): @@ -386,14 +366,14 @@ static enum aux_channel_operation_result get_channel_status( if (value & AUX_SW_STATUS__AUX_SW_DONE_MASK) { if ((value & AUX_SW_STATUS__AUX_SW_RX_TIMEOUT_STATE_MASK) || (value & AUX_SW_STATUS__AUX_SW_RX_TIMEOUT_MASK)) - return AUX_CHANNEL_OPERATION_FAILED_TIMEOUT; + return AUX_RET_ERROR_TIMEOUT; else if ((value & AUX_SW_STATUS__AUX_SW_RX_INVALID_STOP_MASK) || (value & AUX_SW_STATUS__AUX_SW_RX_RECV_NO_DET_MASK) || (value & AUX_SW_STATUS__AUX_SW_RX_RECV_INVALID_H_MASK) || (value & AUX_SW_STATUS__AUX_SW_RX_RECV_INVALID_L_MASK)) - return AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY; + return AUX_RET_ERROR_INVALID_REPLY; *returned_bytes = get_reg_field_value(value, AUX_SW_STATUS, @@ -401,537 +381,590 @@ static enum aux_channel_operation_result get_channel_status( if (*returned_bytes == 0) return - AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY; + AUX_RET_ERROR_INVALID_REPLY; else { *returned_bytes -= 1; - return AUX_CHANNEL_OPERATION_SUCCEEDED; + return AUX_RET_SUCCESS; } } else { /*time_elapsed >= aux_engine->timeout_period * AUX_SW_STATUS__AUX_SW_HPD_DISCON = at this point */ ASSERT_CRITICAL(false); - return AUX_CHANNEL_OPERATION_FAILED_TIMEOUT; + return AUX_RET_ERROR_TIMEOUT; } } -static void process_read_reply( - struct aux_engine *engine, - struct read_command_context *ctx) -{ - engine->funcs->process_channel_reply(engine, &ctx->reply); - - switch (ctx->reply.status) { - case AUX_TRANSACTION_REPLY_AUX_ACK: - ctx->defer_retry_aux = 0; - if (ctx->returned_byte > ctx->current_read_length) { - ctx->status = - I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR; - ctx->operation_succeeded = false; - } else if (ctx->returned_byte < ctx->current_read_length) { - ctx->current_read_length -= ctx->returned_byte; - - ctx->offset += ctx->returned_byte; - - ++ctx->invalid_reply_retry_aux_on_ack; - - if (ctx->invalid_reply_retry_aux_on_ack > - AUX_INVALID_REPLY_RETRY_COUNTER) { - ctx->status = - I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR; - ctx->operation_succeeded = false; - } - } else { - ctx->status = I2CAUX_TRANSACTION_STATUS_SUCCEEDED; - ctx->transaction_complete = true; - ctx->operation_succeeded = true; - } - break; - case AUX_TRANSACTION_REPLY_AUX_NACK: - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_NACK; - ctx->operation_succeeded = false; - break; - case AUX_TRANSACTION_REPLY_AUX_DEFER: - ++ctx->defer_retry_aux; - - if (ctx->defer_retry_aux > AUX_DEFER_RETRY_COUNTER) { - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT; - ctx->operation_succeeded = false; - } - break; - case AUX_TRANSACTION_REPLY_I2C_DEFER: - ctx->defer_retry_aux = 0; - - ++ctx->defer_retry_i2c; - if (ctx->defer_retry_i2c > AUX_DEFER_RETRY_COUNTER) { - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT; - ctx->operation_succeeded = false; - } - break; - case AUX_TRANSACTION_REPLY_HPD_DISCON: - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON; - ctx->operation_succeeded = false; - break; - default: - ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN; - ctx->operation_succeeded = false; - } -} -static void process_read_request( - struct aux_engine *engine, - struct read_command_context *ctx) +static bool acquire( + struct dce_aux *engine, + struct ddc *ddc) { - enum aux_channel_operation_result operation_result; - - engine->funcs->submit_channel_request(engine, &ctx->request); + enum gpio_result result; - operation_result = engine->funcs->get_channel_status( - engine, &ctx->returned_byte); + if ((engine == NULL) || !is_engine_available(engine)) + return false; - switch (operation_result) { - case AUX_CHANNEL_OPERATION_SUCCEEDED: - if (ctx->returned_byte > ctx->current_read_length) { - ctx->status = - I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR; - ctx->operation_succeeded = false; - } else { - ctx->timed_out_retry_aux = 0; - ctx->invalid_reply_retry_aux = 0; + result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE, + GPIO_DDC_CONFIG_TYPE_MODE_AUX); - ctx->reply.length = ctx->returned_byte; - ctx->reply.data = ctx->buffer; + if (result != GPIO_RESULT_OK) + return false; - process_read_reply(engine, ctx); - } - break; - case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY: - ++ctx->invalid_reply_retry_aux; - - if (ctx->invalid_reply_retry_aux > - AUX_INVALID_REPLY_RETRY_COUNTER) { - ctx->status = - I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR; - ctx->operation_succeeded = false; - } else - udelay(400); - break; - case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT: - ++ctx->timed_out_retry_aux; - - if (ctx->timed_out_retry_aux > AUX_TIMED_OUT_RETRY_COUNTER) { - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT; - ctx->operation_succeeded = false; - } else { - /* DP 1.2a, table 2-58: - * "S3: AUX Request CMD PENDING: - * retry 3 times, with 400usec wait on each" - * The HW timeout is set to 550usec, - * so we should not wait here - */ - } - break; - case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON: - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON; - ctx->operation_succeeded = false; - break; - default: - ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN; - ctx->operation_succeeded = false; - } -} -static bool read_command( - struct aux_engine *engine, - struct i2caux_transaction_request *request, - bool middle_of_transaction) -{ - struct read_command_context ctx; - - ctx.buffer = request->payload.data; - ctx.current_read_length = request->payload.length; - ctx.offset = 0; - ctx.timed_out_retry_aux = 0; - ctx.invalid_reply_retry_aux = 0; - ctx.defer_retry_aux = 0; - ctx.defer_retry_i2c = 0; - ctx.invalid_reply_retry_aux_on_ack = 0; - ctx.transaction_complete = false; - ctx.operation_succeeded = true; - - if (request->payload.address_space == - I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) { - ctx.request.type = AUX_TRANSACTION_TYPE_DP; - ctx.request.action = I2CAUX_TRANSACTION_ACTION_DP_READ; - ctx.request.address = request->payload.address; - } else if (request->payload.address_space == - I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) { - ctx.request.type = AUX_TRANSACTION_TYPE_I2C; - ctx.request.action = middle_of_transaction ? - I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT : - I2CAUX_TRANSACTION_ACTION_I2C_READ; - ctx.request.address = request->payload.address >> 1; - } else { - /* in DAL2, there was no return in such case */ - BREAK_TO_DEBUGGER(); + if (!acquire_engine(engine)) { + engine->ddc = ddc; + release_engine(engine); return false; } - ctx.request.delay = 0; - - do { - memset(ctx.buffer + ctx.offset, 0, ctx.current_read_length); - - ctx.request.data = ctx.buffer + ctx.offset; - ctx.request.length = ctx.current_read_length; + engine->ddc = ddc; - process_read_request(engine, &ctx); + return true; +} - request->status = ctx.status; +void dce110_engine_destroy(struct dce_aux **engine) +{ - if (ctx.operation_succeeded && !ctx.transaction_complete) - if (ctx.request.type == AUX_TRANSACTION_TYPE_I2C) - msleep(engine->delay); - } while (ctx.operation_succeeded && !ctx.transaction_complete); + struct aux_engine_dce110 *engine110 = FROM_AUX_ENGINE(*engine); - if (request->payload.address_space == - I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) { - DC_LOG_I2C_AUX("READ: addr:0x%x value:0x%x Result:%d", - request->payload.address, - request->payload.data[0], - ctx.operation_succeeded); - } + kfree(engine110); + *engine = NULL; - return ctx.operation_succeeded; } -static void process_write_reply( - struct aux_engine *engine, - struct write_command_context *ctx) +static uint32_t dce_aux_configure_timeout(struct ddc_service *ddc, + uint32_t timeout_in_us) { - engine->funcs->process_channel_reply(engine, &ctx->reply); + uint32_t multiplier = 0; + uint32_t length = 0; + uint32_t prev_length = 0; + uint32_t prev_mult = 0; + uint32_t prev_timeout_val = 0; + struct ddc *ddc_pin = ddc->ddc_pin; + struct dce_aux *aux_engine = ddc->ctx->dc->res_pool->engines[ddc_pin->pin_data->en]; + struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(aux_engine); + + /* 1-Update polling timeout period */ + aux110->polling_timeout_period = timeout_in_us * SW_AUX_TIMEOUT_PERIOD_MULTIPLIER; + + /* 2-Update aux timeout period length and multiplier */ + if (timeout_in_us == 0) { + multiplier = DEFAULT_AUX_ENGINE_MULT; + length = DEFAULT_AUX_ENGINE_LENGTH; + } else if (timeout_in_us <= TIME_OUT_INCREMENT) { + multiplier = 0; + length = timeout_in_us/TIME_OUT_MULTIPLIER_8; + if (timeout_in_us % TIME_OUT_MULTIPLIER_8 != 0) + length++; + } else if (timeout_in_us <= 2 * TIME_OUT_INCREMENT) { + multiplier = 1; + length = timeout_in_us/TIME_OUT_MULTIPLIER_16; + if (timeout_in_us % TIME_OUT_MULTIPLIER_16 != 0) + length++; + } else if (timeout_in_us <= 4 * TIME_OUT_INCREMENT) { + multiplier = 2; + length = timeout_in_us/TIME_OUT_MULTIPLIER_32; + if (timeout_in_us % TIME_OUT_MULTIPLIER_32 != 0) + length++; + } else if (timeout_in_us > 4 * TIME_OUT_INCREMENT) { + multiplier = 3; + length = timeout_in_us/TIME_OUT_MULTIPLIER_64; + if (timeout_in_us % TIME_OUT_MULTIPLIER_64 != 0) + length++; + } - switch (ctx->reply.status) { - case AUX_TRANSACTION_REPLY_AUX_ACK: - ctx->operation_succeeded = true; + length = (length < MAX_TIMEOUT_LENGTH) ? length : MAX_TIMEOUT_LENGTH; - if (ctx->returned_byte) { - ctx->request.action = ctx->mot ? - I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT : - I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST; + REG_GET_2(AUX_DPHY_RX_CONTROL1, AUX_RX_TIMEOUT_LEN, &prev_length, AUX_RX_TIMEOUT_LEN_MUL, &prev_mult); - ctx->current_write_length = 0; + switch (prev_mult) { + case 0: + prev_timeout_val = prev_length * TIME_OUT_MULTIPLIER_8; + break; + case 1: + prev_timeout_val = prev_length * TIME_OUT_MULTIPLIER_16; + break; + case 2: + prev_timeout_val = prev_length * TIME_OUT_MULTIPLIER_32; + break; + case 3: + prev_timeout_val = prev_length * TIME_OUT_MULTIPLIER_64; + break; + default: + prev_timeout_val = DEFAULT_AUX_ENGINE_LENGTH * TIME_OUT_MULTIPLIER_8; + break; + } - ++ctx->ack_m_retry; + REG_UPDATE_SEQ_2(AUX_DPHY_RX_CONTROL1, AUX_RX_TIMEOUT_LEN, length, AUX_RX_TIMEOUT_LEN_MUL, multiplier); - if (ctx->ack_m_retry > AUX_DEFER_RETRY_COUNTER) { - ctx->status = - I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT; - ctx->operation_succeeded = false; - } else - udelay(300); - } else { - ctx->status = I2CAUX_TRANSACTION_STATUS_SUCCEEDED; - ctx->defer_retry_aux = 0; - ctx->ack_m_retry = 0; - ctx->transaction_complete = true; - } - break; - case AUX_TRANSACTION_REPLY_AUX_NACK: - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_NACK; - ctx->operation_succeeded = false; - break; - case AUX_TRANSACTION_REPLY_AUX_DEFER: - ++ctx->defer_retry_aux; - - if (ctx->defer_retry_aux > ctx->max_defer_retry) { - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT; - ctx->operation_succeeded = false; - } - break; - case AUX_TRANSACTION_REPLY_I2C_DEFER: - ctx->defer_retry_aux = 0; - ctx->current_write_length = 0; + return prev_timeout_val; +} - ctx->request.action = ctx->mot ? - I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT : - I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST; +static struct dce_aux_funcs aux_functions = { + .configure_timeout = NULL, + .destroy = NULL, +}; - ++ctx->defer_retry_i2c; +struct dce_aux *dce110_aux_engine_construct(struct aux_engine_dce110 *aux_engine110, + struct dc_context *ctx, + uint32_t inst, + uint32_t timeout_period, + const struct dce110_aux_registers *regs, + const struct dce110_aux_registers_mask *mask, + const struct dce110_aux_registers_shift *shift, + bool is_ext_aux_timeout_configurable) +{ + aux_engine110->base.ddc = NULL; + aux_engine110->base.ctx = ctx; + aux_engine110->base.delay = 0; + aux_engine110->base.max_defer_write_retry = 0; + aux_engine110->base.inst = inst; + aux_engine110->polling_timeout_period = timeout_period; + aux_engine110->regs = regs; - if (ctx->defer_retry_i2c > ctx->max_defer_retry) { - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT; - ctx->operation_succeeded = false; - } - break; - case AUX_TRANSACTION_REPLY_HPD_DISCON: - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON; - ctx->operation_succeeded = false; - break; - default: - ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN; - ctx->operation_succeeded = false; - } + aux_engine110->mask = mask; + aux_engine110->shift = shift; + aux_engine110->base.funcs = &aux_functions; + if (is_ext_aux_timeout_configurable) + aux_engine110->base.funcs->configure_timeout = &dce_aux_configure_timeout; + + return &aux_engine110->base; } -static void process_write_request( - struct aux_engine *engine, - struct write_command_context *ctx) + +static enum i2caux_transaction_action i2caux_action_from_payload(struct aux_payload *payload) { - enum aux_channel_operation_result operation_result; - - engine->funcs->submit_channel_request(engine, &ctx->request); - - operation_result = engine->funcs->get_channel_status( - engine, &ctx->returned_byte); - - switch (operation_result) { - case AUX_CHANNEL_OPERATION_SUCCEEDED: - ctx->timed_out_retry_aux = 0; - ctx->invalid_reply_retry_aux = 0; - - ctx->reply.length = ctx->returned_byte; - ctx->reply.data = ctx->reply_data; - - process_write_reply(engine, ctx); - break; - case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY: - ++ctx->invalid_reply_retry_aux; - - if (ctx->invalid_reply_retry_aux > - AUX_INVALID_REPLY_RETRY_COUNTER) { - ctx->status = - I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR; - ctx->operation_succeeded = false; - } else - udelay(400); - break; - case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT: - ++ctx->timed_out_retry_aux; - - if (ctx->timed_out_retry_aux > AUX_TIMED_OUT_RETRY_COUNTER) { - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT; - ctx->operation_succeeded = false; - } else { - /* DP 1.2a, table 2-58: - * "S3: AUX Request CMD PENDING: - * retry 3 times, with 400usec wait on each" - * The HW timeout is set to 550usec, - * so we should not wait here - */ + if (payload->i2c_over_aux) { + if (payload->write_status_update) { + if (payload->mot) + return I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT; + else + return I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST; } - break; - case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON: - ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON; - ctx->operation_succeeded = false; - break; - default: - ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN; - ctx->operation_succeeded = false; - } -} -static bool write_command( - struct aux_engine *engine, - struct i2caux_transaction_request *request, - bool middle_of_transaction) -{ - struct write_command_context ctx; - - ctx.mot = middle_of_transaction; - ctx.buffer = request->payload.data; - ctx.current_write_length = request->payload.length; - ctx.timed_out_retry_aux = 0; - ctx.invalid_reply_retry_aux = 0; - ctx.defer_retry_aux = 0; - ctx.defer_retry_i2c = 0; - ctx.ack_m_retry = 0; - ctx.transaction_complete = false; - ctx.operation_succeeded = true; - - if (request->payload.address_space == - I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) { - ctx.request.type = AUX_TRANSACTION_TYPE_DP; - ctx.request.action = I2CAUX_TRANSACTION_ACTION_DP_WRITE; - ctx.request.address = request->payload.address; - } else if (request->payload.address_space == - I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) { - ctx.request.type = AUX_TRANSACTION_TYPE_I2C; - ctx.request.action = middle_of_transaction ? - I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT : - I2CAUX_TRANSACTION_ACTION_I2C_WRITE; - ctx.request.address = request->payload.address >> 1; - } else { - /* in DAL2, there was no return in such case */ - BREAK_TO_DEBUGGER(); - return false; - } - - ctx.request.delay = 0; - - ctx.max_defer_retry = - (engine->max_defer_write_retry > AUX_DEFER_RETRY_COUNTER) ? - engine->max_defer_write_retry : AUX_DEFER_RETRY_COUNTER; + if (payload->write) { + if (payload->mot) + return I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT; + else + return I2CAUX_TRANSACTION_ACTION_I2C_WRITE; + } + if (payload->mot) + return I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT; - do { - ctx.request.data = ctx.buffer; - ctx.request.length = ctx.current_write_length; + return I2CAUX_TRANSACTION_ACTION_I2C_READ; + } + if (payload->write) + return I2CAUX_TRANSACTION_ACTION_DP_WRITE; - process_write_request(engine, &ctx); + return I2CAUX_TRANSACTION_ACTION_DP_READ; +} - request->status = ctx.status; +int dce_aux_transfer_raw(struct ddc_service *ddc, + struct aux_payload *payload, + enum aux_return_code_type *operation_result) +{ + struct ddc *ddc_pin = ddc->ddc_pin; + struct dce_aux *aux_engine; + struct aux_request_transaction_data aux_req; + uint8_t returned_bytes = 0; + int res = -1; + uint32_t status; - if (ctx.operation_succeeded && !ctx.transaction_complete) - if (ctx.request.type == AUX_TRANSACTION_TYPE_I2C) - msleep(engine->delay); - } while (ctx.operation_succeeded && !ctx.transaction_complete); + memset(&aux_req, 0, sizeof(aux_req)); - if (request->payload.address_space == - I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) { - DC_LOG_I2C_AUX("WRITE: addr:0x%x value:0x%x Result:%d", - request->payload.address, - request->payload.data[0], - ctx.operation_succeeded); + if (ddc_pin == NULL) { + *operation_result = AUX_RET_ERROR_ENGINE_ACQUIRE; + return -1; } - return ctx.operation_succeeded; -} -static bool end_of_transaction_command( - struct aux_engine *engine, - struct i2caux_transaction_request *request) -{ - struct i2caux_transaction_request dummy_request; - uint8_t dummy_data; + aux_engine = ddc->ctx->dc->res_pool->engines[ddc_pin->pin_data->en]; + if (!acquire(aux_engine, ddc_pin)) { + *operation_result = AUX_RET_ERROR_ENGINE_ACQUIRE; + return -1; + } - /* [tcheng] We only need to send the stop (read with MOT = 0) - * for I2C-over-Aux, not native AUX - */ + if (payload->i2c_over_aux) + aux_req.type = AUX_TRANSACTION_TYPE_I2C; + else + aux_req.type = AUX_TRANSACTION_TYPE_DP; - if (request->payload.address_space != - I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) - return false; + aux_req.action = i2caux_action_from_payload(payload); - dummy_request.operation = request->operation; - dummy_request.payload.address_space = request->payload.address_space; - dummy_request.payload.address = request->payload.address; + aux_req.address = payload->address; + aux_req.delay = 0; + aux_req.length = payload->length; + aux_req.data = payload->data; - /* - * Add a dummy byte due to some receiver quirk - * where one byte is sent along with MOT = 0. - * Ideally this should be 0. - */ + submit_channel_request(aux_engine, &aux_req); + *operation_result = get_channel_status(aux_engine, &returned_bytes); - dummy_request.payload.length = 0; - dummy_request.payload.data = &dummy_data; + if (*operation_result == AUX_RET_SUCCESS) { + int __maybe_unused bytes_replied = 0; - if (request->operation == I2CAUX_TRANSACTION_READ) - return read_command(engine, &dummy_request, false); - else - return write_command(engine, &dummy_request, false); + bytes_replied = read_channel_reply(aux_engine, payload->length, + payload->data, payload->reply, + &status); + EVENT_LOG_AUX_REP(aux_engine->ddc->pin_data->en, + EVENT_LOG_AUX_ORIGIN_NATIVE, *payload->reply, + bytes_replied, payload->data); + res = returned_bytes; + } else { + res = -1; + } - /* according Syed, it does not need now DoDummyMOT */ + release_engine(aux_engine); + return res; } -static bool submit_request( - struct aux_engine *engine, - struct i2caux_transaction_request *request, - bool middle_of_transaction) -{ - bool result; - bool mot_used = true; +int dce_aux_transfer_dmub_raw(struct ddc_service *ddc, + struct aux_payload *payload, + enum aux_return_code_type *operation_result) +{ + struct ddc *ddc_pin = ddc->ddc_pin; - switch (request->operation) { - case I2CAUX_TRANSACTION_READ: - result = read_command(engine, request, mot_used); - break; - case I2CAUX_TRANSACTION_WRITE: - result = write_command(engine, request, mot_used); - break; - default: - result = false; + if (ddc_pin != NULL) { + struct dce_aux *aux_engine = ddc->ctx->dc->res_pool->engines[ddc_pin->pin_data->en]; + /* XXX: Workaround to configure ddc channels for aux transactions */ + if (!acquire(aux_engine, ddc_pin)) { + *operation_result = AUX_RET_ERROR_ENGINE_ACQUIRE; + return -1; + } + release_engine(aux_engine); } - /* [tcheng] - * need to send stop for the last transaction to free up the AUX - * if the above command fails, this would be the last transaction - */ - - if (!middle_of_transaction || !result) - end_of_transaction_command(engine, request); + return dm_helper_dmub_aux_transfer_sync(ddc->ctx, ddc->link, payload, operation_result); +} - /* mask AUX interrupt */ +#define AUX_MAX_RETRIES 7 +#define AUX_MIN_DEFER_RETRIES 7 +#define AUX_MAX_DEFER_TIMEOUT_MS 50 +#define AUX_MAX_I2C_DEFER_RETRIES 7 +#define AUX_MAX_INVALID_REPLY_RETRIES 2 +#define AUX_MAX_TIMEOUT_RETRIES 3 +#define AUX_DEFER_DELAY_FOR_DPIA 4 /*ms*/ - return result; -} -enum i2caux_engine_type get_engine_type( - const struct aux_engine *engine) +static void dce_aux_log_payload(const char *payload_name, + unsigned char *payload, uint32_t length, uint32_t max_length_to_log) { - return I2CAUX_ENGINE_TYPE_AUX; -} + if (!IS_DC_I2CAUX_LOGGING_ENABLED()) + return; -static bool acquire( - struct aux_engine *engine, - struct ddc *ddc) -{ + if (payload && length) { + char hex_str[128] = {0}; + char *hex_str_ptr = &hex_str[0]; + uint32_t hex_str_remaining = sizeof(hex_str); + unsigned char *payload_ptr = payload; + unsigned char *payload_max_to_log_ptr = payload_ptr + min(max_length_to_log, length); + unsigned int count; + char *padding = ""; + + while (payload_ptr < payload_max_to_log_ptr) { + count = snprintf_count(hex_str_ptr, hex_str_remaining, "%s%02X", padding, *payload_ptr); + padding = " "; + hex_str_remaining -= count; + hex_str_ptr += count; + payload_ptr++; + } - enum gpio_result result; + count = snprintf_count(hex_str_ptr, hex_str_remaining, " "); + hex_str_remaining -= count; + hex_str_ptr += count; + + payload_ptr = payload; + while (payload_ptr < payload_max_to_log_ptr) { + count = snprintf_count(hex_str_ptr, hex_str_remaining, "%c", + *payload_ptr >= ' ' ? *payload_ptr : '.'); + hex_str_remaining -= count; + hex_str_ptr += count; + payload_ptr++; + } - if (engine->funcs->is_engine_available) { - /*check whether SW could use the engine*/ - if (!engine->funcs->is_engine_available(engine)) - return false; + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_VERBOSE, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_log_payload: %s: length=%u: data: %s%s", + payload_name, + length, + hex_str, + (length > max_length_to_log ? " (...)" : " ")); + } else { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_VERBOSE, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_log_payload: %s: length=%u: data: <empty payload>", + payload_name, + length); } +} - result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE, - GPIO_DDC_CONFIG_TYPE_MODE_AUX); - - if (result != GPIO_RESULT_OK) - return false; - - if (!engine->funcs->acquire_engine(engine)) { - dal_ddc_close(ddc); - return false; +bool dce_aux_transfer_with_retries(struct ddc_service *ddc, + struct aux_payload *payload) +{ + int i, ret = 0; + uint8_t reply; + bool payload_reply = true; + enum aux_return_code_type operation_result; + bool retry_on_defer = false; + struct ddc *ddc_pin = ddc->ddc_pin; + struct dce_aux *aux_engine = NULL; + struct aux_engine_dce110 *aux110 = NULL; + uint32_t defer_time_in_ms = 0; + + int aux_ack_retries = 0, + aux_defer_retries = 0, + aux_i2c_defer_retries = 0, + aux_timeout_retries = 0, + aux_invalid_reply_retries = 0, + aux_ack_m_retries = 0; + + if (ddc_pin) { + aux_engine = ddc->ctx->dc->res_pool->engines[ddc_pin->pin_data->en]; + aux110 = FROM_AUX_ENGINE(aux_engine); } - engine->ddc = ddc; - - return true; -} - -static const struct aux_engine_funcs aux_engine_funcs = { - .acquire_engine = acquire_engine, - .submit_channel_request = submit_channel_request, - .process_channel_reply = process_channel_reply, - .read_channel_reply = read_channel_reply, - .get_channel_status = get_channel_status, - .is_engine_available = is_engine_available, - .release_engine = release_engine, - .destroy_engine = dce110_engine_destroy, - .submit_request = submit_request, - .get_engine_type = get_engine_type, - .acquire = acquire, -}; + if (!payload->reply) { + payload_reply = false; + payload->reply = &reply; + } -void dce110_engine_destroy(struct aux_engine **engine) -{ + for (i = 0; i < AUX_MAX_RETRIES; i++) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: link_index=%u: START: retry %d of %d: " + "address=0x%04x length=%u write=%d mot=%d is_i2c=%d is_dpia=%d ddc_hw_inst=%d", + ddc && ddc->link ? ddc->link->link_index : UINT_MAX, + i + 1, + (int)AUX_MAX_RETRIES, + payload->address, + payload->length, + (unsigned int) payload->write, + (unsigned int) payload->mot, + payload->i2c_over_aux, + (ddc->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) ? true : false, + ddc->link->ddc_hw_inst); + if (payload->write) + dce_aux_log_payload(" write", payload->data, payload->length, 16); + + /* Check whether aux to be processed via dmub or dcn directly */ + if (ddc->ctx->dc->debug.enable_dmub_aux_for_legacy_ddc + || ddc->ddc_pin == NULL) { + ret = dce_aux_transfer_dmub_raw(ddc, payload, &operation_result); + } else { + ret = dce_aux_transfer_raw(ddc, payload, &operation_result); + } - struct aux_engine_dce110 *engine110 = FROM_AUX_ENGINE(*engine); + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: link_index=%u: END: retry %d of %d: " + "address=0x%04x length=%u write=%d mot=%d: ret=%d operation_result=%d " + "payload->reply=%u is_i2c=%d is_dpia=%d ddc_hw_inst=%d", + ddc && ddc->link ? ddc->link->link_index : UINT_MAX, + i + 1, + (int)AUX_MAX_RETRIES, + payload->address, + payload->length, + (unsigned int) payload->write, + (unsigned int) payload->mot, + ret, + (int)operation_result, + (unsigned int) *payload->reply, + payload->i2c_over_aux, + (ddc->link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) ? true : false, + ddc->link->ddc_hw_inst); + if (!payload->write) + dce_aux_log_payload(" read", payload->data, ret > 0 ? ret : 0, 16); + + switch (operation_result) { + case AUX_RET_SUCCESS: + aux_timeout_retries = 0; + aux_invalid_reply_retries = 0; + + switch (*payload->reply) { + case AUX_TRANSACTION_REPLY_AUX_ACK: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: AUX_RET_SUCCESS: AUX_TRANSACTION_REPLY_AUX_ACK"); + if (!payload->write && payload->length != ret) { + if (++aux_ack_retries >= AUX_MAX_RETRIES) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "dce_aux_transfer_with_retries: FAILURE: aux_ack_retries=%d >= AUX_MAX_RETRIES=%d", + aux_defer_retries, + AUX_MAX_RETRIES); + goto fail; + } else + udelay(300); + } else if (payload->write && ret > 0) { + /* sink requested more time to complete the write via AUX_ACKM */ + if (++aux_ack_m_retries >= AUX_MAX_RETRIES) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "dce_aux_transfer_with_retries: FAILURE: aux_ack_m_retries=%d >= AUX_MAX_RETRIES=%d", + aux_ack_m_retries, + AUX_MAX_RETRIES); + goto fail; + } + + /* retry reading the write status until complete + * NOTE: payload is modified here + */ + payload->write = false; + payload->write_status_update = true; + payload->length = 0; + udelay(300); + } else + return true; + break; + + case AUX_TRANSACTION_REPLY_AUX_DEFER: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: AUX_RET_SUCCESS: AUX_TRANSACTION_REPLY_AUX_DEFER"); + + /* polling_timeout_period is in us */ + if (aux110) + defer_time_in_ms += aux110->polling_timeout_period / 1000; + else + defer_time_in_ms += AUX_DEFER_DELAY_FOR_DPIA; + ++aux_defer_retries; + fallthrough; + case AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER: + if (*payload->reply == AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER) + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: AUX_RET_SUCCESS: AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER"); + + retry_on_defer = true; + + if (aux_defer_retries >= AUX_MIN_DEFER_RETRIES + && defer_time_in_ms >= AUX_MAX_DEFER_TIMEOUT_MS) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "dce_aux_transfer_with_retries: FAILURE: aux_defer_retries=%d >= AUX_MIN_DEFER_RETRIES=%d && defer_time_in_ms=%d >= AUX_MAX_DEFER_TIMEOUT_MS=%d", + aux_defer_retries, + AUX_MIN_DEFER_RETRIES, + defer_time_in_ms, + AUX_MAX_DEFER_TIMEOUT_MS); + goto fail; + } else { + if ((*payload->reply == AUX_TRANSACTION_REPLY_AUX_DEFER) || + (*payload->reply == AUX_TRANSACTION_REPLY_I2C_OVER_AUX_DEFER)) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: payload->defer_delay=%u", + payload->defer_delay); + fsleep(payload->defer_delay * 1000); + defer_time_in_ms += payload->defer_delay; + } + } + break; + case AUX_TRANSACTION_REPLY_I2C_OVER_AUX_NACK: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: FAILURE: AUX_TRANSACTION_REPLY_I2C_OVER_AUX_NACK"); + goto fail; + case AUX_TRANSACTION_REPLY_I2C_DEFER: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: AUX_RET_SUCCESS: AUX_TRANSACTION_REPLY_I2C_DEFER"); + + aux_defer_retries = 0; + if (++aux_i2c_defer_retries >= AUX_MAX_I2C_DEFER_RETRIES) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "dce_aux_transfer_with_retries: FAILURE: aux_i2c_defer_retries=%d >= AUX_MAX_I2C_DEFER_RETRIES=%d", + aux_i2c_defer_retries, + AUX_MAX_I2C_DEFER_RETRIES); + goto fail; + } + break; + + case AUX_TRANSACTION_REPLY_AUX_NACK: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: AUX_RET_SUCCESS: AUX_TRANSACTION_REPLY_AUX_NACK"); + goto fail; + + case AUX_TRANSACTION_REPLY_HPD_DISCON: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: AUX_RET_SUCCESS: AUX_TRANSACTION_REPLY_HPD_DISCON"); + goto fail; + + default: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "dce_aux_transfer_with_retries: AUX_RET_SUCCESS: FAILURE: AUX_TRANSACTION_REPLY_* unknown, default case. Reply: %d", *payload->reply); + goto fail; + } + break; + + case AUX_RET_ERROR_INVALID_REPLY: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: AUX_RET_ERROR_INVALID_REPLY"); + if (++aux_invalid_reply_retries >= AUX_MAX_INVALID_REPLY_RETRIES) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "dce_aux_transfer_with_retries: FAILURE: aux_invalid_reply_retries=%d >= AUX_MAX_INVALID_REPLY_RETRIES=%d", + aux_invalid_reply_retries, + AUX_MAX_INVALID_REPLY_RETRIES); + goto fail; + } else + udelay(400); + break; + + case AUX_RET_ERROR_TIMEOUT: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: AUX_RET_ERROR_TIMEOUT"); + // Check whether a DEFER had occurred before the timeout. + // If so, treat timeout as a DEFER. + if (retry_on_defer) { + if (++aux_defer_retries >= AUX_MIN_DEFER_RETRIES) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "dce_aux_transfer_with_retries: FAILURE: aux_defer_retries=%d >= AUX_MIN_DEFER_RETRIES=%d", + aux_defer_retries, + AUX_MIN_DEFER_RETRIES); + goto fail; + } else if (payload->defer_delay > 0) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_INFORMATION, + LOG_FLAG_I2cAux_DceAux, + "dce_aux_transfer_with_retries: payload->defer_delay=%u", + payload->defer_delay); + msleep(payload->defer_delay); + } + } else { + if (++aux_timeout_retries >= AUX_MAX_TIMEOUT_RETRIES) { + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "dce_aux_transfer_with_retries: FAILURE: aux_timeout_retries=%d >= AUX_MAX_TIMEOUT_RETRIES=%d", + aux_timeout_retries, + AUX_MAX_TIMEOUT_RETRIES); + goto fail; + } else { + /* + * DP 1.4, 2.8.2: AUX Transaction Response/Reply Timeouts + * According to the DP spec there should be 3 retries total + * with a 400us wait inbetween each. Hardware already waits + * for 550us therefore no wait is required here. + */ + } + } + break; - kfree(engine110); - *engine = NULL; + case AUX_RET_ERROR_HPD_DISCON: + case AUX_RET_ERROR_ENGINE_ACQUIRE: + case AUX_RET_ERROR_UNKNOWN: + default: + goto fail; + } + } -} -struct aux_engine *dce110_aux_engine_construct(struct aux_engine_dce110 *aux_engine110, - struct dc_context *ctx, - uint32_t inst, - uint32_t timeout_period, - const struct dce110_aux_registers *regs) -{ - aux_engine110->base.ddc = NULL; - aux_engine110->base.ctx = ctx; - aux_engine110->base.delay = 0; - aux_engine110->base.max_defer_write_retry = 0; - aux_engine110->base.funcs = &aux_engine_funcs; - aux_engine110->base.inst = inst; - aux_engine110->timeout_period = timeout_period; - aux_engine110->regs = regs; +fail: + DC_TRACE_LEVEL_MESSAGE(DAL_TRACE_LEVEL_ERROR, + LOG_FLAG_Error_I2cAux, + "%s: Failure: operation_result=%d", + __func__, + (int)operation_result); + if (!payload_reply) + payload->reply = NULL; - return &aux_engine110->base; + return false; } - |