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 | 154 |
1 files changed, 152 insertions, 2 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 index 700ce42036d7..df244b175fdb 100644 --- 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 @@ -90,6 +90,64 @@ static bool dcn32_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr, uint return false; } +/* + * Use these functions to return back delay information so we can aggregate the total + * delay when requesting hardmin clk + * + * dcn32_smu_wait_for_response_delay + * dcn32_smu_send_msg_with_param_delay + * + */ +static uint32_t dcn32_smu_wait_for_response_delay(struct clk_mgr_internal *clk_mgr, unsigned int delay_us, unsigned int max_retries, unsigned int *total_delay_us) +{ + uint32_t reg = 0; + *total_delay_us = 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); + *total_delay_us += delay_us; + } while (max_retries--); + + return reg; +} + +static bool dcn32_smu_send_msg_with_param_delay(struct clk_mgr_internal *clk_mgr, uint32_t msg_id, uint32_t param_in, uint32_t *param_out, unsigned int *total_delay_us) +{ + unsigned int delay1_us, delay2_us; + *total_delay_us = 0; + + /* Wait for response register to be ready */ + dcn32_smu_wait_for_response_delay(clk_mgr, 10, 200000, &delay1_us); + + /* 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_delay(clk_mgr, 10, 200000, &delay2_us) == DALSMC_Result_OK) { + if (param_out) + *param_out = REG_READ(DAL_ARG_REG); + + *total_delay_us = delay1_us + delay2_us; + return true; + } + + *total_delay_us = delay1_us + 2000000; + 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); @@ -122,10 +180,98 @@ void dcn32_smu_set_pme_workaround(struct clk_mgr_internal *clk_mgr) DALSMC_MSG_BacoAudioD3PME, 0, NULL); } +/* Check PMFW version if it supports ReturnHardMinStatus message */ +static bool dcn32_get_hard_min_status_supported(struct clk_mgr_internal *clk_mgr) +{ + if (ASICREV_IS_GC_11_0_0(clk_mgr->base.ctx->asic_id.hw_internal_rev)) { + if (clk_mgr->smu_ver >= 0x4e6a00) + return true; + } else if (ASICREV_IS_GC_11_0_2(clk_mgr->base.ctx->asic_id.hw_internal_rev)) { + if (clk_mgr->smu_ver >= 0x524e00) + return true; + } else { /* ASICREV_IS_GC_11_0_3 */ + if (clk_mgr->smu_ver >= 0x503900) + return true; + } + return false; +} + +/* Returns the clocks which were fulfilled by the DAL hard min arbiter in PMFW */ +static unsigned int dcn32_smu_get_hard_min_status(struct clk_mgr_internal *clk_mgr, bool *no_timeout, unsigned int *total_delay_us) +{ + uint32_t response = 0; + + /* bits 23:16 for clock type, lower 16 bits for frequency in MHz */ + uint32_t param = 0; + + *no_timeout = dcn32_smu_send_msg_with_param_delay(clk_mgr, + DALSMC_MSG_ReturnHardMinStatus, param, &response, total_delay_us); + + smu_print("SMU Get hard min status: no_timeout %d delay %d us clk bits %x\n", + *no_timeout, *total_delay_us, response); + + return response; +} + +static bool dcn32_smu_wait_get_hard_min_status(struct clk_mgr_internal *clk_mgr, + uint32_t clk) +{ + int readDalHardMinClkBits, checkDalHardMinClkBits; + unsigned int total_delay_us, read_total_delay_us; + bool no_timeout, hard_min_done; + + static unsigned int cur_wait_get_hard_min_max_us; + static unsigned int cur_wait_get_hard_min_max_timeouts; + + checkDalHardMinClkBits = CHECK_HARD_MIN_CLK_DPREFCLK; + if (clk == PPCLK_DISPCLK) + checkDalHardMinClkBits |= CHECK_HARD_MIN_CLK_DISPCLK; + if (clk == PPCLK_DPPCLK) + checkDalHardMinClkBits |= CHECK_HARD_MIN_CLK_DPPCLK; + if (clk == PPCLK_DCFCLK) + checkDalHardMinClkBits |= CHECK_HARD_MIN_CLK_DCFCLK; + if (clk == PPCLK_DTBCLK) + checkDalHardMinClkBits |= CHECK_HARD_MIN_CLK_DTBCLK; + if (clk == PPCLK_UCLK) + checkDalHardMinClkBits |= CHECK_HARD_MIN_CLK_UCLK; + + if (checkDalHardMinClkBits == CHECK_HARD_MIN_CLK_DPREFCLK) + return 0; + + total_delay_us = 0; + hard_min_done = false; + while (1) { + readDalHardMinClkBits = dcn32_smu_get_hard_min_status(clk_mgr, &no_timeout, &read_total_delay_us); + total_delay_us += read_total_delay_us; + if (checkDalHardMinClkBits == (readDalHardMinClkBits & checkDalHardMinClkBits)) { + hard_min_done = true; + break; + } + + + if (total_delay_us >= 2000000) { + cur_wait_get_hard_min_max_timeouts++; + smu_print("SMU Wait get hard min status: %d timeouts\n", cur_wait_get_hard_min_max_timeouts); + break; + } + msleep(1); + total_delay_us += 1000; + } + + if (total_delay_us > cur_wait_get_hard_min_max_us) + cur_wait_get_hard_min_max_us = total_delay_us; + + smu_print("SMU Wait get hard min status: no_timeout %d, delay %d us, max %d us, read %x, check %x\n", + no_timeout, total_delay_us, cur_wait_get_hard_min_max_us, readDalHardMinClkBits, checkDalHardMinClkBits); + + return hard_min_done; +} + /* 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; + bool hard_min_done = false; /* bits 23:16 for clock type, lower 16 bits for frequency in MHz */ uint32_t param = (clk << 16) | freq_mhz; @@ -133,9 +279,13 @@ unsigned int dcn32_smu_set_hard_min_by_freq(struct clk_mgr_internal *clk_mgr, ui 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); + DALSMC_MSG_SetHardMinByFreq, param, &response); - smu_print("SMU Frequency set = %d KHz\n", response); + if (dcn32_get_hard_min_status_supported(clk_mgr)) { + hard_min_done = dcn32_smu_wait_get_hard_min_status(clk_mgr, clk); + smu_print("SMU Frequency set = %d KHz hard_min_done %d\n", response, hard_min_done); + } else + smu_print("SMU Frequency set = %d KHz\n", response); return response; } |