diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr_smu_msg.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr_smu_msg.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr_smu_msg.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr_smu_msg.c new file mode 100644 index 000000000..fb524fe4a --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr_smu_msg.c @@ -0,0 +1,141 @@ +/* + * Copyright 2021 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 "dcn32_clk_mgr_smu_msg.h" + +#include "clk_mgr_internal.h" +#include "reg_helper.h" +#include "dalsmc.h" +#include "smu13_driver_if.h" + +#define mmDAL_MSG_REG 0x1628A +#define mmDAL_ARG_REG 0x16273 +#define mmDAL_RESP_REG 0x16274 + +#define REG(reg_name) \ + mm ## reg_name + +#include "logger_types.h" + +#define smu_print(str, ...) {DC_LOG_SMU(str, ##__VA_ARGS__); } + + +/* + * Function to be used instead of REG_WAIT macro because the wait ends when + * the register is NOT EQUAL to zero, and because the translation in msg_if.h + * won't work with REG_WAIT. + */ +static uint32_t dcn32_smu_wait_for_response(struct clk_mgr_internal *clk_mgr, unsigned int delay_us, unsigned int max_retries) +{ + uint32_t reg = 0; + + do { + reg = REG_READ(DAL_RESP_REG); + if (reg) + break; + + if (delay_us >= 1000) + msleep(delay_us/1000); + else if (delay_us > 0) + udelay(delay_us); + } while (max_retries--); + + return reg; +} + +static bool dcn32_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr, uint32_t msg_id, uint32_t param_in, uint32_t *param_out) +{ + /* Wait for response register to be ready */ + dcn32_smu_wait_for_response(clk_mgr, 10, 200000); + + /* Clear response register */ + REG_WRITE(DAL_RESP_REG, 0); + + /* Set the parameter register for the SMU message */ + REG_WRITE(DAL_ARG_REG, param_in); + + /* Trigger the message transaction by writing the message ID */ + REG_WRITE(DAL_MSG_REG, msg_id); + + /* Wait for response */ + if (dcn32_smu_wait_for_response(clk_mgr, 10, 200000) == DALSMC_Result_OK) { + if (param_out) + *param_out = REG_READ(DAL_ARG_REG); + + return true; + } + + return false; +} + +void dcn32_smu_send_fclk_pstate_message(struct clk_mgr_internal *clk_mgr, bool enable) +{ + smu_print("FCLK P-state support value is : %d\n", enable); + + dcn32_smu_send_msg_with_param(clk_mgr, + DALSMC_MSG_SetFclkSwitchAllow, enable ? FCLK_PSTATE_SUPPORTED : FCLK_PSTATE_NOTSUPPORTED, NULL); +} + +void dcn32_smu_send_cab_for_uclk_message(struct clk_mgr_internal *clk_mgr, unsigned int num_ways) +{ + uint32_t param = (num_ways << 1) | (num_ways > 0); + + dcn32_smu_send_msg_with_param(clk_mgr, DALSMC_MSG_SetCabForUclkPstate, param, NULL); + smu_print("Numways for SubVP : %d\n", num_ways); +} + +void dcn32_smu_transfer_wm_table_dram_2_smu(struct clk_mgr_internal *clk_mgr) +{ + smu_print("SMU Transfer WM table DRAM 2 SMU\n"); + + dcn32_smu_send_msg_with_param(clk_mgr, + DALSMC_MSG_TransferTableDram2Smu, TABLE_WATERMARKS, NULL); +} + +void dcn32_smu_set_pme_workaround(struct clk_mgr_internal *clk_mgr) +{ + smu_print("SMU Set PME workaround\n"); + + dcn32_smu_send_msg_with_param(clk_mgr, + DALSMC_MSG_BacoAudioD3PME, 0, NULL); +} + +/* Returns the actual frequency that was set in MHz, 0 on failure */ +unsigned int dcn32_smu_set_hard_min_by_freq(struct clk_mgr_internal *clk_mgr, uint32_t clk, uint16_t freq_mhz) +{ + uint32_t response = 0; + + /* bits 23:16 for clock type, lower 16 bits for frequency in MHz */ + uint32_t param = (clk << 16) | freq_mhz; + + smu_print("SMU Set hard min by freq: clk = %d, freq_mhz = %d MHz\n", clk, freq_mhz); + + dcn32_smu_send_msg_with_param(clk_mgr, + DALSMC_MSG_SetHardMinByFreq, param, &response); + + smu_print("SMU Frequency set = %d KHz\n", response); + + return response; +} |