1 /* 2 * Copyright 2020 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: AMD 23 * 24 */ 25 26 #include <linux/delay.h> 27 #include "dcn30_clk_mgr_smu_msg.h" 28 29 #include "clk_mgr_internal.h" 30 #include "reg_helper.h" 31 #include "dm_helpers.h" 32 33 #include "dalsmc.h" 34 #include "dcn30_smu11_driver_if.h" 35 36 #define mmDAL_MSG_REG 0x1628A 37 #define mmDAL_ARG_REG 0x16273 38 #define mmDAL_RESP_REG 0x16274 39 40 #define REG(reg_name) \ 41 mm ## reg_name 42 43 #include "logger_types.h" 44 #undef DC_LOGGER 45 #define DC_LOGGER \ 46 CTX->logger 47 #define smu_print(str, ...) {DC_LOG_SMU(str, ##__VA_ARGS__); } 48 49 50 /* 51 * Function to be used instead of REG_WAIT macro because the wait ends when 52 * the register is NOT EQUAL to zero, and because the translation in msg_if.h 53 * won't work with REG_WAIT. 54 */ 55 static uint32_t dcn30_smu_wait_for_response(struct clk_mgr_internal *clk_mgr, unsigned int delay_us, unsigned int max_retries) 56 { 57 uint32_t reg = 0; 58 59 do { 60 reg = REG_READ(DAL_RESP_REG); 61 if (reg) 62 break; 63 64 if (delay_us >= 1000) 65 msleep(delay_us/1000); 66 else if (delay_us > 0) 67 udelay(delay_us); 68 } while (max_retries--); 69 70 /* handle DALSMC_Result_CmdRejectedBusy? */ 71 72 /* Log? */ 73 74 return reg; 75 } 76 77 static bool dcn30_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr, uint32_t msg_id, uint32_t param_in, uint32_t *param_out) 78 { 79 uint32_t result; 80 /* Wait for response register to be ready */ 81 dcn30_smu_wait_for_response(clk_mgr, 10, 200000); 82 83 /* Clear response register */ 84 REG_WRITE(DAL_RESP_REG, 0); 85 86 /* Set the parameter register for the SMU message */ 87 REG_WRITE(DAL_ARG_REG, param_in); 88 89 /* Trigger the message transaction by writing the message ID */ 90 REG_WRITE(DAL_MSG_REG, msg_id); 91 92 result = dcn30_smu_wait_for_response(clk_mgr, 10, 200000); 93 94 if (IS_SMU_TIMEOUT(result)) { 95 dm_helpers_smu_timeout(CTX, msg_id, param_in, 10 * 200000); 96 } 97 98 /* Wait for response */ 99 if (result == DALSMC_Result_OK) { 100 if (param_out) 101 *param_out = REG_READ(DAL_ARG_REG); 102 103 return true; 104 } 105 106 return false; 107 } 108 109 /* Test message should return input + 1 */ 110 bool dcn30_smu_test_message(struct clk_mgr_internal *clk_mgr, uint32_t input) 111 { 112 uint32_t response = 0; 113 114 smu_print("SMU Test message: %d\n", input); 115 116 if (dcn30_smu_send_msg_with_param(clk_mgr, 117 DALSMC_MSG_TestMessage, input, &response)) 118 if (response == input + 1) 119 return true; 120 121 return false; 122 } 123 124 bool dcn30_smu_get_smu_version(struct clk_mgr_internal *clk_mgr, unsigned int *version) 125 { 126 smu_print("SMU Get SMU version\n"); 127 128 if (dcn30_smu_send_msg_with_param(clk_mgr, 129 DALSMC_MSG_GetSmuVersion, 0, version)) { 130 131 smu_print("SMU version: %d\n", *version); 132 133 return true; 134 } 135 136 return false; 137 } 138 139 /* Message output should match SMU11_DRIVER_IF_VERSION in smu11_driver_if.h */ 140 bool dcn30_smu_check_driver_if_version(struct clk_mgr_internal *clk_mgr) 141 { 142 uint32_t response = 0; 143 144 smu_print("SMU Check driver if version\n"); 145 146 if (dcn30_smu_send_msg_with_param(clk_mgr, 147 DALSMC_MSG_GetDriverIfVersion, 0, &response)) { 148 149 smu_print("SMU driver if version: %d\n", response); 150 151 if (response == SMU11_DRIVER_IF_VERSION) 152 return true; 153 } 154 155 return false; 156 } 157 158 /* Message output should match DALSMC_VERSION in dalsmc.h */ 159 bool dcn30_smu_check_msg_header_version(struct clk_mgr_internal *clk_mgr) 160 { 161 uint32_t response = 0; 162 163 smu_print("SMU Check msg header version\n"); 164 165 if (dcn30_smu_send_msg_with_param(clk_mgr, 166 DALSMC_MSG_GetMsgHeaderVersion, 0, &response)) { 167 168 smu_print("SMU msg header version: %d\n", response); 169 170 if (response == DALSMC_VERSION) 171 return true; 172 } 173 174 return false; 175 } 176 177 void dcn30_smu_set_dram_addr_high(struct clk_mgr_internal *clk_mgr, uint32_t addr_high) 178 { 179 smu_print("SMU Set DRAM addr high: %d\n", addr_high); 180 181 dcn30_smu_send_msg_with_param(clk_mgr, 182 DALSMC_MSG_SetDalDramAddrHigh, addr_high, NULL); 183 } 184 185 void dcn30_smu_set_dram_addr_low(struct clk_mgr_internal *clk_mgr, uint32_t addr_low) 186 { 187 smu_print("SMU Set DRAM addr low: %d\n", addr_low); 188 189 dcn30_smu_send_msg_with_param(clk_mgr, 190 DALSMC_MSG_SetDalDramAddrLow, addr_low, NULL); 191 } 192 193 void dcn30_smu_transfer_wm_table_smu_2_dram(struct clk_mgr_internal *clk_mgr) 194 { 195 smu_print("SMU Transfer WM table SMU 2 DRAM\n"); 196 197 dcn30_smu_send_msg_with_param(clk_mgr, 198 DALSMC_MSG_TransferTableSmu2Dram, TABLE_WATERMARKS, NULL); 199 } 200 201 void dcn30_smu_transfer_wm_table_dram_2_smu(struct clk_mgr_internal *clk_mgr) 202 { 203 smu_print("SMU Transfer WM table DRAM 2 SMU\n"); 204 205 dcn30_smu_send_msg_with_param(clk_mgr, 206 DALSMC_MSG_TransferTableDram2Smu, TABLE_WATERMARKS, NULL); 207 } 208 209 /* Returns the actual frequency that was set in MHz, 0 on failure */ 210 unsigned int dcn30_smu_set_hard_min_by_freq(struct clk_mgr_internal *clk_mgr, uint32_t clk, uint16_t freq_mhz) 211 { 212 uint32_t response = 0; 213 214 /* bits 23:16 for clock type, lower 16 bits for frequency in MHz */ 215 uint32_t param = (clk << 16) | freq_mhz; 216 217 smu_print("SMU Set hard min by freq: clk = %d, freq_mhz = %d MHz\n", clk, freq_mhz); 218 219 dcn30_smu_send_msg_with_param(clk_mgr, 220 DALSMC_MSG_SetHardMinByFreq, param, &response); 221 222 smu_print("SMU Frequency set = %d MHz\n", response); 223 224 return response; 225 } 226 227 /* Returns the actual frequency that was set in MHz, 0 on failure */ 228 unsigned int dcn30_smu_set_hard_max_by_freq(struct clk_mgr_internal *clk_mgr, uint32_t clk, uint16_t freq_mhz) 229 { 230 uint32_t response = 0; 231 232 /* bits 23:16 for clock type, lower 16 bits for frequency in MHz */ 233 uint32_t param = (clk << 16) | freq_mhz; 234 235 smu_print("SMU Set hard max by freq: clk = %d, freq_mhz = %d MHz\n", clk, freq_mhz); 236 237 dcn30_smu_send_msg_with_param(clk_mgr, 238 DALSMC_MSG_SetHardMaxByFreq, param, &response); 239 240 smu_print("SMU Frequency set = %d MHz\n", response); 241 242 return response; 243 } 244 245 /* 246 * Frequency in MHz returned in lower 16 bits for valid DPM level 247 * 248 * Call with dpm_level = 0xFF to query features, return value will be: 249 * Bits 7:0 - number of DPM levels 250 * Bit 28 - 1 = auto DPM on 251 * Bit 29 - 1 = sweep DPM on 252 * Bit 30 - 1 = forced DPM on 253 * Bit 31 - 0 = discrete, 1 = fine-grained 254 * 255 * With fine-grained DPM, only min and max frequencies will be reported 256 * 257 * Returns 0 on failure 258 */ 259 unsigned int dcn30_smu_get_dpm_freq_by_index(struct clk_mgr_internal *clk_mgr, uint32_t clk, uint8_t dpm_level) 260 { 261 uint32_t response = 0; 262 263 /* bits 23:16 for clock type, lower 8 bits for DPM level */ 264 uint32_t param = (clk << 16) | dpm_level; 265 266 smu_print("SMU Get dpm freq by index: clk = %d, dpm_level = %d\n", clk, dpm_level); 267 268 dcn30_smu_send_msg_with_param(clk_mgr, 269 DALSMC_MSG_GetDpmFreqByIndex, param, &response); 270 271 smu_print("SMU dpm freq: %d MHz\n", response); 272 273 return response; 274 } 275 276 /* Returns the max DPM frequency in DC mode in MHz, 0 on failure */ 277 unsigned int dcn30_smu_get_dc_mode_max_dpm_freq(struct clk_mgr_internal *clk_mgr, uint32_t clk) 278 { 279 uint32_t response = 0; 280 281 /* bits 23:16 for clock type */ 282 uint32_t param = clk << 16; 283 284 smu_print("SMU Get DC mode max DPM freq: clk = %d\n", clk); 285 286 dcn30_smu_send_msg_with_param(clk_mgr, 287 DALSMC_MSG_GetDcModeMaxDpmFreq, param, &response); 288 289 smu_print("SMU DC mode max DMP freq: %d MHz\n", response); 290 291 return response; 292 } 293 294 void dcn30_smu_set_min_deep_sleep_dcef_clk(struct clk_mgr_internal *clk_mgr, uint32_t freq_mhz) 295 { 296 smu_print("SMU Set min deep sleep dcef clk: freq_mhz = %d MHz\n", freq_mhz); 297 298 dcn30_smu_send_msg_with_param(clk_mgr, 299 DALSMC_MSG_SetMinDeepSleepDcefclk, freq_mhz, NULL); 300 } 301 302 void dcn30_smu_set_num_of_displays(struct clk_mgr_internal *clk_mgr, uint32_t num_displays) 303 { 304 smu_print("SMU Set num of displays: num_displays = %d\n", num_displays); 305 306 dcn30_smu_send_msg_with_param(clk_mgr, 307 DALSMC_MSG_NumOfDisplays, num_displays, NULL); 308 } 309 310 void dcn30_smu_set_display_refresh_from_mall(struct clk_mgr_internal *clk_mgr, bool enable, uint8_t cache_timer_delay, uint8_t cache_timer_scale) 311 { 312 /* bits 8:7 for cache timer scale, bits 6:1 for cache timer delay, bit 0 = 1 for enable, = 0 for disable */ 313 uint32_t param = (cache_timer_scale << 7) | (cache_timer_delay << 1) | (enable ? 1 : 0); 314 315 dcn30_smu_send_msg_with_param(clk_mgr, 316 DALSMC_MSG_SetDisplayRefreshFromMall, param, NULL); 317 } 318 319 void dcn30_smu_set_external_client_df_cstate_allow(struct clk_mgr_internal *clk_mgr, bool enable) 320 { 321 smu_print("SMU Set external client df cstate allow: enable = %d\n", enable); 322 323 dcn30_smu_send_msg_with_param(clk_mgr, 324 DALSMC_MSG_SetExternalClientDfCstateAllow, enable ? 1 : 0, NULL); 325 } 326 327 void dcn30_smu_set_pme_workaround(struct clk_mgr_internal *clk_mgr) 328 { 329 smu_print("SMU Set PME workaround\n"); 330 331 dcn30_smu_send_msg_with_param(clk_mgr, 332 DALSMC_MSG_BacoAudioD3PME, 0, NULL); 333 } 334