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 | 34 |
1 files changed, 31 insertions, 3 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 95cb4d7cc76ae3..6d42a9cc991627 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c @@ -534,17 +534,26 @@ struct dce_aux *dce110_aux_engine_construct(struct aux_engine_dce110 *aux_engine static enum i2caux_transaction_action i2caux_action_from_payload(struct aux_payload *payload) { 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; + } if (payload->write) { if (payload->mot) return I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT; - return I2CAUX_TRANSACTION_ACTION_I2C_WRITE; + else + return I2CAUX_TRANSACTION_ACTION_I2C_WRITE; } if (payload->mot) return I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT; + return I2CAUX_TRANSACTION_ACTION_I2C_READ; } if (payload->write) return I2CAUX_TRANSACTION_ACTION_DP_WRITE; + return I2CAUX_TRANSACTION_ACTION_DP_READ; } @@ -698,7 +707,8 @@ bool dce_aux_transfer_with_retries(struct ddc_service *ddc, aux_defer_retries = 0, aux_i2c_defer_retries = 0, aux_timeout_retries = 0, - aux_invalid_reply_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]; @@ -758,9 +768,27 @@ bool dce_aux_transfer_with_retries(struct ddc_service *ddc, aux_defer_retries, AUX_MAX_RETRIES); goto fail; - } else { + } 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; |