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Date: Fri, 3 Nov 2023 12:06:17 +0800
From: kernel test robot <lkp@...el.com>
To: Qing Zhang <zhangqing@...ngson.cn>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Huacai Chen <chenhuacai@...nel.org>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training_8b_10b.c:254:17:
warning: 'dp_decide_lane_settings' accessing 4 bytes in a region of size 1
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: bc3012f4e3a9765de81f454cb8f9bb16aafc6ff5
commit: 5aa4ac64e6add3e40d5049e31275b2822daf885d LoongArch: Add KASAN (Kernel Address Sanitizer) support
date: 8 weeks ago
config: loongarch-randconfig-002-20231102 (https://download.01.org/0day-ci/archive/20231103/202311031119.NVzPwvI8-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231103/202311031119.NVzPwvI8-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311031119.NVzPwvI8-lkp@intel.com/
All warnings (new ones prefixed by >>):
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training_8b_10b.c: In function 'perform_8b_10b_clock_recovery_sequence':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training_8b_10b.c:254:17: warning: 'dp_decide_lane_settings' accessing 4 bytes in a region of size 1 [-Wstringop-overflow=]
254 | dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
255 | lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training_8b_10b.c:254:17: note: referencing argument 4 of type 'union dpcd_training_lane[4]'
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training_8b_10b.h:29,
from drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training_8b_10b.c:30:
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training.h:110:6: note: in a call to function 'dp_decide_lane_settings'
110 | void dp_decide_lane_settings(
| ^~~~~~~~~~~~~~~~~~~~~~~
vim +/dp_decide_lane_settings +254 drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training_8b_10b.c
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 153
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 154 enum link_training_result perform_8b_10b_clock_recovery_sequence(
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 155 struct dc_link *link,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 156 const struct link_resource *link_res,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 157 struct link_training_settings *lt_settings,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 158 uint32_t offset)
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 159 {
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 160 uint32_t retries_cr;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 161 uint32_t retry_count;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 162 uint32_t wait_time_microsec;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 163 enum dc_lane_count lane_count = lt_settings->link_settings.lane_count;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 164 union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX];
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 165 union lane_align_status_updated dpcd_lane_status_updated;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 166 union lane_adjust dpcd_lane_adjust[LANE_COUNT_DP_MAX] = {0};
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 167
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 168 retries_cr = 0;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 169 retry_count = 0;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 170
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 171 memset(&dpcd_lane_status, '\0', sizeof(dpcd_lane_status));
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 172 memset(&dpcd_lane_status_updated, '\0',
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 173 sizeof(dpcd_lane_status_updated));
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 174
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 175 if (!link->ctx->dc->work_arounds.lt_early_cr_pattern)
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 176 dp_set_hw_training_pattern(link, link_res, lt_settings->pattern_for_cr, offset);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 177
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 178 /* najeeb - The synaptics MST hub can put the LT in
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 179 * infinite loop by switching the VS
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 180 */
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 181 /* between level 0 and level 1 continuously, here
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 182 * we try for CR lock for LinkTrainingMaxCRRetry count*/
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 183 while ((retries_cr < LINK_TRAINING_MAX_RETRY_COUNT) &&
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 184 (retry_count < LINK_TRAINING_MAX_CR_RETRY)) {
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 185
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 186
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 187 /* 1. call HWSS to set lane settings*/
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 188 dp_set_hw_lane_settings(
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 189 link,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 190 link_res,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 191 lt_settings,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 192 offset);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 193
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 194 /* 2. update DPCD of the receiver*/
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 195 if (!retry_count)
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 196 /* EPR #361076 - write as a 5-byte burst,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 197 * but only for the 1-st iteration.*/
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 198 dpcd_set_lt_pattern_and_lane_settings(
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 199 link,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 200 lt_settings,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 201 lt_settings->pattern_for_cr,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 202 offset);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 203 else
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 204 dpcd_set_lane_settings(
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 205 link,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 206 lt_settings,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 207 offset);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 208
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 209 /* 3. wait receiver to lock-on*/
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 210 wait_time_microsec = lt_settings->cr_pattern_time;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 211
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 212 dp_wait_for_training_aux_rd_interval(
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 213 link,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 214 wait_time_microsec);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 215
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 216 /* 4. Read lane status and requested drive
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 217 * settings as set by the sink
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 218 */
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 219 dp_get_lane_status_and_lane_adjust(
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 220 link,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 221 lt_settings,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 222 dpcd_lane_status,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 223 &dpcd_lane_status_updated,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 224 dpcd_lane_adjust,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 225 offset);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 226
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 227 /* 5. check CR done*/
88c7ad91e378775 drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c Srinivasan Shanmugam 2023-04-14 228 if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
88c7ad91e378775 drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c Srinivasan Shanmugam 2023-04-14 229 DC_LOG_HW_LINK_TRAINING("%s: Clock recovery OK\n", __func__);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 230 return LINK_TRAINING_SUCCESS;
88c7ad91e378775 drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c Srinivasan Shanmugam 2023-04-14 231 }
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 232
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 233 /* 6. max VS reached*/
d5a43956b73bd78 drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-15 234 if ((link_dp_get_encoding_format(<_settings->link_settings) ==
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 235 DP_8b_10b_ENCODING) &&
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 236 dp_is_max_vs_reached(lt_settings))
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 237 break;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 238
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 239 /* 7. same lane settings*/
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 240 /* Note: settings are the same for all lanes,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 241 * so comparing first lane is sufficient*/
d5a43956b73bd78 drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-15 242 if ((link_dp_get_encoding_format(<_settings->link_settings) == DP_8b_10b_ENCODING) &&
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 243 lt_settings->dpcd_lane_settings[0].bits.VOLTAGE_SWING_SET ==
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 244 dpcd_lane_adjust[0].bits.VOLTAGE_SWING_LANE)
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 245 retries_cr++;
d5a43956b73bd78 drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-15 246 else if ((link_dp_get_encoding_format(<_settings->link_settings) == DP_128b_132b_ENCODING) &&
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 247 lt_settings->dpcd_lane_settings[0].tx_ffe.PRESET_VALUE ==
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 248 dpcd_lane_adjust[0].tx_ffe.PRESET_VALUE)
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 249 retries_cr++;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 250 else
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 251 retries_cr = 0;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 252
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 253 /* 8. update VS/PE/PC2 in lt_settings*/
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 @254 dp_decide_lane_settings(lt_settings, dpcd_lane_adjust,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 255 lt_settings->hw_lane_settings, lt_settings->dpcd_lane_settings);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 256 retry_count++;
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 257 }
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 258
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 259 if (retry_count >= LINK_TRAINING_MAX_CR_RETRY) {
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 260 ASSERT(0);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 261 DC_LOG_ERROR("%s: Link Training Error, could not get CR after %d tries. Possibly voltage swing issue",
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 262 __func__,
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 263 LINK_TRAINING_MAX_CR_RETRY);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 264
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 265 }
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 266
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 267 return dp_get_cr_failure(lane_count, dpcd_lane_status);
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 268 }
630168a97314a8f drivers/gpu/drm/amd/display/dc/link/link_dp_training_8b_10b.c Wenjing Liu 2022-12-14 269
:::::: The code at line 254 was first introduced by commit
:::::: 630168a97314a8f6da9c09d73f5e78c3c1fe3eee drm/amd/display: move dp link training logic to link_dp_training
:::::: TO: Wenjing Liu <wenjing.liu@....com>
:::::: CC: Alex Deucher <alexander.deucher@....com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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