diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/i2caux/dce110/aux_engine_dce110.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/i2caux/dce110/aux_engine_dce110.c | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce110/aux_engine_dce110.c b/drivers/gpu/drm/amd/display/dc/i2caux/dce110/aux_engine_dce110.c new file mode 100644 index 000000000000..81f9f3e34c10 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce110/aux_engine_dce110.c @@ -0,0 +1,470 @@ +/* + * Copyright 2012-15 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#include "dm_services.h" + +/* + * Pre-requisites: headers required by header of this unit + */ +#include "include/i2caux_interface.h" +#include "../engine.h" +#include "../aux_engine.h" + +/* + * Header of this unit + */ + +#include "aux_engine_dce110.h" + +/* + * Post-requisites: headers required by this unit + */ +#include "dce/dce_11_0_sh_mask.h" + +#define CTX \ + aux110->base.base.ctx +#define REG(reg_name)\ + (aux110->regs->reg_name) +#include "reg_helper.h" + +/* + * This unit + */ + +/* + * @brief + * Cast 'struct aux_engine *' + * to 'struct aux_engine_dce110 *' + */ +#define FROM_AUX_ENGINE(ptr) \ + container_of((ptr), struct aux_engine_dce110, base) + +/* + * @brief + * Cast 'struct engine *' + * to 'struct aux_engine_dce110 *' + */ +#define FROM_ENGINE(ptr) \ + FROM_AUX_ENGINE(container_of((ptr), struct aux_engine, base)) + +static void release_engine( + struct engine *engine) +{ + struct aux_engine_dce110 *aux110 = FROM_ENGINE(engine); + + REG_UPDATE(AUX_ARB_CONTROL, AUX_SW_DONE_USING_AUX_REG, 1); +} + +static void destruct( + struct aux_engine_dce110 *engine); + +static void destroy( + struct aux_engine **aux_engine) +{ + struct aux_engine_dce110 *engine = FROM_AUX_ENGINE(*aux_engine); + + destruct(engine); + + kfree(engine); + + *aux_engine = NULL; +} + +#define SW_CAN_ACCESS_AUX 1 +#define DMCU_CAN_ACCESS_AUX 2 + +static bool is_engine_available( + struct aux_engine *engine) +{ + struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); + + uint32_t value = REG_READ(AUX_ARB_CONTROL); + uint32_t field = get_reg_field_value( + value, + AUX_ARB_CONTROL, + AUX_REG_RW_CNTL_STATUS); + + return (field != DMCU_CAN_ACCESS_AUX); +} +static bool acquire_engine( + struct aux_engine *engine) +{ + struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); + + uint32_t value = REG_READ(AUX_ARB_CONTROL); + uint32_t field = get_reg_field_value( + value, + AUX_ARB_CONTROL, + AUX_REG_RW_CNTL_STATUS); + if (field == DMCU_CAN_ACCESS_AUX) + return false; + /* enable AUX before request SW to access AUX */ + value = REG_READ(AUX_CONTROL); + field = get_reg_field_value(value, + AUX_CONTROL, + AUX_EN); + + if (field == 0) { + set_reg_field_value( + value, + 1, + AUX_CONTROL, + AUX_EN); + + if (REG(AUX_RESET_MASK)) { + /*DP_AUX block as part of the enable sequence*/ + set_reg_field_value( + value, + 1, + AUX_CONTROL, + AUX_RESET); + } + + REG_WRITE(AUX_CONTROL, value); + + if (REG(AUX_RESET_MASK)) { + /*poll HW to make sure reset it done*/ + + REG_WAIT(AUX_CONTROL, AUX_RESET_DONE, 1, + 1, 11); + + set_reg_field_value( + value, + 0, + AUX_CONTROL, + AUX_RESET); + + REG_WRITE(AUX_CONTROL, value); + + REG_WAIT(AUX_CONTROL, AUX_RESET_DONE, 0, + 1, 11); + } + } /*if (field)*/ + + /* request SW to access AUX */ + REG_UPDATE(AUX_ARB_CONTROL, AUX_SW_USE_AUX_REG_REQ, 1); + + value = REG_READ(AUX_ARB_CONTROL); + field = get_reg_field_value( + value, + AUX_ARB_CONTROL, + AUX_REG_RW_CNTL_STATUS); + + return (field == SW_CAN_ACCESS_AUX); +} + +#define COMPOSE_AUX_SW_DATA_16_20(command, address) \ + ((command) | ((0xF0000 & (address)) >> 16)) + +#define COMPOSE_AUX_SW_DATA_8_15(address) \ + ((0xFF00 & (address)) >> 8) + +#define COMPOSE_AUX_SW_DATA_0_7(address) \ + (0xFF & (address)) + +static void submit_channel_request( + struct aux_engine *engine, + struct aux_request_transaction_data *request) +{ + struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); + uint32_t value; + uint32_t length; + + bool is_write = + ((request->type == AUX_TRANSACTION_TYPE_DP) && + (request->action == I2CAUX_TRANSACTION_ACTION_DP_WRITE)) || + ((request->type == AUX_TRANSACTION_TYPE_I2C) && + ((request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) || + (request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT))); + + /* clear_aux_error */ + REG_UPDATE_SEQ(AUXN_IMPCAL, AUXN_CALOUT_ERROR_AK, + 1, + 0); + + REG_UPDATE_SEQ(AUXP_IMPCAL, AUXP_CALOUT_ERROR_AK, + 1, + 0); + + /* force_default_calibrate */ + REG_UPDATE_1BY1_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); + + /* set the delay and the number of bytes to write */ + + /* The length include + * the 4 bit header and the 20 bit address + * (that is 3 byte). + * If the requested length is non zero this means + * an addition byte specifying the length is required. */ + + length = request->length ? 4 : 3; + if (is_write) + length += request->length; + + REG_UPDATE_2(AUX_SW_CONTROL, + AUX_SW_START_DELAY, request->delay, + AUX_SW_WR_BYTES, length); + + /* program action and address and payload data (if 'is_write') */ + value = REG_UPDATE_4(AUX_SW_DATA, + AUX_SW_INDEX, 0, + AUX_SW_DATA_RW, 0, + AUX_SW_AUTOINCREMENT_DISABLE, 1, + AUX_SW_DATA, COMPOSE_AUX_SW_DATA_16_20(request->action, request->address)); + + value = REG_SET_2(AUX_SW_DATA, value, + AUX_SW_AUTOINCREMENT_DISABLE, 0, + AUX_SW_DATA, COMPOSE_AUX_SW_DATA_8_15(request->address)); + + value = REG_SET(AUX_SW_DATA, value, + AUX_SW_DATA, COMPOSE_AUX_SW_DATA_0_7(request->address)); + + if (request->length) { + value = REG_SET(AUX_SW_DATA, value, + AUX_SW_DATA, request->length - 1); + } + + if (is_write) { + /* Load the HW buffer with the Data to be sent. + * This is relevant for write operation. + * For read, the data recived data will be + * processed in process_channel_reply(). */ + uint32_t i = 0; + + while (i < request->length) { + value = REG_SET(AUX_SW_DATA, value, + AUX_SW_DATA, request->data[i]); + + ++i; + } + } + + 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); +} + +static void process_channel_reply( + struct aux_engine *engine, + struct aux_reply_transaction_data *reply) +{ + struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); + + /* Need to do a read to get the number of bytes to process + * Alternatively, this information can be passed - + * but that causes coupling which isn't good either. */ + + uint32_t bytes_replied; + uint32_t value; + + value = REG_GET(AUX_SW_STATUS, + AUX_SW_REPLY_BYTE_COUNT, &bytes_replied); + + if (bytes_replied) { + uint32_t reply_result; + + REG_UPDATE_1BY1_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); + + reply_result = reply_result >> 4; + + switch (reply_result) { + case 0: /* ACK */ { + uint32_t i = 0; + + /* first byte was already used + * to get the command status */ + --bytes_replied; + + while (i < bytes_replied) { + uint32_t aux_sw_data_val; + + REG_GET(AUX_SW_DATA, + AUX_SW_DATA, &aux_sw_data_val); + + reply->data[i] = aux_sw_data_val; + ++i; + } + + 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; + } + } else { + /* 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 (!(value & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK)) + ASSERT_CRITICAL(false); + } +} + +static enum aux_channel_operation_result get_channel_status( + struct aux_engine *engine, + uint8_t *returned_bytes) +{ + struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine); + + uint32_t value; + + if (returned_bytes == NULL) { + /*caller pass NULL pointer*/ + ASSERT_CRITICAL(false); + return AUX_CHANNEL_OPERATION_FAILED_REASON_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); + + /* Note that the following bits are set in 'status.bits' + * during CTS 4.2.1.2 (FW 3.3.1): + * AUX_SW_RX_MIN_COUNT_VIOL, AUX_SW_RX_INVALID_STOP, + * AUX_SW_RX_RECV_NO_DET, AUX_SW_RX_RECV_INVALID_H. + * + * AUX_SW_RX_MIN_COUNT_VIOL is an internal, + * HW debugging bit and should be ignored. */ + 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; + + 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; + + *returned_bytes = get_reg_field_value(value, + AUX_SW_STATUS, + AUX_SW_REPLY_BYTE_COUNT); + + if (*returned_bytes == 0) + return + AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY; + else { + *returned_bytes -= 1; + return AUX_CHANNEL_OPERATION_SUCCEEDED; + } + } else { + /*time_elapsed >= aux_engine->timeout_period */ + if (!(value & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK)) + ASSERT_CRITICAL(false); + + return AUX_CHANNEL_OPERATION_FAILED_TIMEOUT; + } +} + +static const struct aux_engine_funcs aux_engine_funcs = { + .destroy = destroy, + .acquire_engine = acquire_engine, + .submit_channel_request = submit_channel_request, + .process_channel_reply = process_channel_reply, + .get_channel_status = get_channel_status, + .is_engine_available = is_engine_available, +}; + +static const struct engine_funcs engine_funcs = { + .release_engine = release_engine, + .submit_request = dal_aux_engine_submit_request, + .get_engine_type = dal_aux_engine_get_engine_type, + .acquire = dal_aux_engine_acquire, +}; + +static void construct( + struct aux_engine_dce110 *engine, + const struct aux_engine_dce110_init_data *aux_init_data) +{ + dal_aux_engine_construct(&engine->base, aux_init_data->ctx); + engine->base.base.funcs = &engine_funcs; + engine->base.funcs = &aux_engine_funcs; + + engine->timeout_period = aux_init_data->timeout_period; + engine->regs = aux_init_data->regs; +} + +static void destruct( + struct aux_engine_dce110 *engine) +{ + struct aux_engine_dce110 *aux110 = engine; +/*temp w/a, to do*/ + REG_UPDATE(AUX_ARB_CONTROL, AUX_DMCU_DONE_USING_AUX_REG, 1); + REG_UPDATE(AUX_ARB_CONTROL, AUX_SW_DONE_USING_AUX_REG, 1); + dal_aux_engine_destruct(&engine->base); +} + +struct aux_engine *dal_aux_engine_dce110_create( + const struct aux_engine_dce110_init_data *aux_init_data) +{ + struct aux_engine_dce110 *engine; + + if (!aux_init_data) { + ASSERT_CRITICAL(false); + return NULL; + } + + engine = kzalloc(sizeof(*engine), GFP_KERNEL); + + if (!engine) { + ASSERT_CRITICAL(false); + return NULL; + } + + construct(engine, aux_init_data); + return &engine->base; +} |