drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training.c:1585:38: warning: variable 'result' set but not used
From: kernel test robot
Date: Sun Mar 05 2023 - 17:37:59 EST
Hi Wenjing,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f915322fe014c5c515119381e886faf07b3c9d31
commit: bc33f5e5f05ba44e48909e2cfc5a97475ec69a4d drm/amd/display: create accessories, hwss and protocols sub folders in link
date: 6 weeks ago
config: alpha-buildonly-randconfig-r003-20230305 (https://download.01.org/0day-ci/archive/20230306/202303060646.W0WedX9v-lkp@xxxxxxxxx/config)
compiler: alpha-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc33f5e5f05ba44e48909e2cfc5a97475ec69a4d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout bc33f5e5f05ba44e48909e2cfc5a97475ec69a4d
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202303060646.W0WedX9v-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training.c: In function 'perform_link_training_with_retries':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training.c:1585:38: warning: variable 'result' set but not used [-Wunused-but-set-variable]
1585 | bool result;
| ^~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:32,
from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/link.h:40,
from drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training.h:29,
from drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training.c:33:
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h: At top level:
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:142:22: warning: 'SYNAPTICS_DEVICE_ID' defined but not used [-Wunused-const-variable=]
142 | static const uint8_t SYNAPTICS_DEVICE_ID[] = "SYNA";
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:139:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_3' defined but not used [-Wunused-const-variable=]
139 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:137:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_2' defined but not used [-Wunused-const-variable=]
137 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:134:17: warning: 'DP_SINK_BRANCH_DEV_NAME_7580' defined but not used [-Wunused-const-variable=]
134 | static const u8 DP_SINK_BRANCH_DEV_NAME_7580[] = "7580\x80u";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:132:22: warning: 'DP_SINK_DEVICE_STR_ID_2' defined but not used [-Wunused-const-variable=]
132 | static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5};
| ^~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:131:22: warning: 'DP_SINK_DEVICE_STR_ID_1' defined but not used [-Wunused-const-variable=]
131 | static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3};
| ^~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:36,
from drivers/gpu/drm/amd/amdgpu/../display/dc/dc.h:29,
from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:29:
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_hdmi_types.h:53:22: warning: 'dp_hdmi_dongle_signature_str' defined but not used [-Wunused-const-variable=]
53 | static const uint8_t dp_hdmi_dongle_signature_str[] = "DP-HDMI ADAPTOR";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_capability.c: In function 'dp_wa_power_up_0010FA':
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_capability.c:278:42: warning: variable 'ds_port' set but not used [-Wunused-but-set-variable]
278 | union dp_downstream_port_present ds_port = { 0 };
| ^~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_capability.c: In function 'dpcd_set_source_specific_data':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_capability.c:1294:32: warning: variable 'result_write_min_hblank' set but not used [-Wunused-but-set-variable]
1294 | enum dc_status result_write_min_hblank = DC_NOT_SUPPORTED;
| ^~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:32,
from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/link.h:40,
from drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_capability.h:29,
from drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_capability.c:37:
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h: At top level:
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:142:22: warning: 'SYNAPTICS_DEVICE_ID' defined but not used [-Wunused-const-variable=]
142 | static const uint8_t SYNAPTICS_DEVICE_ID[] = "SYNA";
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:139:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_3' defined but not used [-Wunused-const-variable=]
139 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:137:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_2' defined but not used [-Wunused-const-variable=]
137 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:134:17: warning: 'DP_SINK_BRANCH_DEV_NAME_7580' defined but not used [-Wunused-const-variable=]
134 | static const u8 DP_SINK_BRANCH_DEV_NAME_7580[] = "7580\x80u";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:132:22: warning: 'DP_SINK_DEVICE_STR_ID_2' defined but not used [-Wunused-const-variable=]
132 | static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5};
| ^~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:131:22: warning: 'DP_SINK_DEVICE_STR_ID_1' defined but not used [-Wunused-const-variable=]
131 | static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3};
| ^~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:36,
from drivers/gpu/drm/amd/amdgpu/../display/dc/dc.h:29,
from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:29:
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_hdmi_types.h:53:22: warning: 'dp_hdmi_dongle_signature_str' defined but not used [-Wunused-const-variable=]
53 | static const uint8_t dp_hdmi_dongle_signature_str[] = "DP-HDMI ADAPTOR";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/result +1585 drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_training.c
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1521
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1522 bool perform_link_training_with_retries(
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1523 const struct dc_link_settings *link_setting,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1524 bool skip_video_pattern,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1525 int attempts,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1526 struct pipe_ctx *pipe_ctx,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1527 enum signal_type signal,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1528 bool do_fallback)
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1529 {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1530 int j;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1531 uint8_t delay_between_attempts = LINK_TRAINING_RETRY_DELAY;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1532 struct dc_stream_state *stream = pipe_ctx->stream;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1533 struct dc_link *link = stream->link;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1534 enum dp_panel_mode panel_mode = dp_get_panel_mode(link);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1535 enum link_training_result status = LINK_TRAINING_CR_FAIL_LANE0;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1536 struct dc_link_settings cur_link_settings = *link_setting;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1537 struct dc_link_settings max_link_settings = *link_setting;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1538 const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1539 int fail_count = 0;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1540 bool is_link_bw_low = false; /* link bandwidth < stream bandwidth */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1541 bool is_link_bw_min = /* RBR x 1 */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1542 (cur_link_settings.link_rate <= LINK_RATE_LOW) &&
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1543 (cur_link_settings.lane_count <= LANE_COUNT_ONE);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1544
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1545 dp_trace_commit_lt_init(link);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1546
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1547
d5a43956b73bd7 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-15 1548 if (link_dp_get_encoding_format(&cur_link_settings) == DP_8b_10b_ENCODING)
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1549 /* We need to do this before the link training to ensure the idle
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1550 * pattern in SST mode will be sent right after the link training
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1551 */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1552 link_hwss->setup_stream_encoder(pipe_ctx);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1553
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1554 dp_trace_set_lt_start_timestamp(link, false);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1555 j = 0;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1556 while (j < attempts && fail_count < (attempts * 10)) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1557
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1558 DC_LOG_HW_LINK_TRAINING("%s: Beginning link(%d) training attempt %u of %d @ rate(%d) x lane(%d)\n",
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1559 __func__, link->link_index, (unsigned int)j + 1, attempts, cur_link_settings.link_rate,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1560 cur_link_settings.lane_count);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1561
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1562 dp_enable_link_phy(
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1563 link,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1564 &pipe_ctx->link_res,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1565 signal,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1566 pipe_ctx->clock_source->id,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1567 &cur_link_settings);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1568
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1569 if (stream->sink_patches.dppowerup_delay > 0) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1570 int delay_dp_power_up_in_ms = stream->sink_patches.dppowerup_delay;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1571
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1572 msleep(delay_dp_power_up_in_ms);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1573 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1574
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1575 #ifdef CONFIG_DRM_AMD_DC_HDCP
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1576 if (panel_mode == DP_PANEL_MODE_EDP) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1577 struct cp_psp *cp_psp = &stream->ctx->cp_psp;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1578
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1579 if (cp_psp && cp_psp->funcs.enable_assr) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1580 /* ASSR is bound to fail with unsigned PSP
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1581 * verstage used during devlopment phase.
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1582 * Report and continue with eDP panel mode to
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1583 * perform eDP link training with right settings
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1584 */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 @1585 bool result;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1586 result = cp_psp->funcs.enable_assr(cp_psp->handle, link);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1587 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1588 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1589 #endif
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1590
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1591 dp_set_panel_mode(link, panel_mode);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1592
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1593 if (link->aux_access_disabled) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1594 dc_link_dp_perform_link_training_skip_aux(link, &pipe_ctx->link_res, &cur_link_settings);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1595 return true;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1596 } else {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1597 /** @todo Consolidate USB4 DP and DPx.x training. */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1598 if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1599 status = dc_link_dpia_perform_link_training(
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1600 link,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1601 &pipe_ctx->link_res,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1602 &cur_link_settings,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1603 skip_video_pattern);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1604
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1605 /* Transmit idle pattern once training successful. */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1606 if (status == LINK_TRAINING_SUCCESS && !is_link_bw_low) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1607 dp_set_hw_test_pattern(link, &pipe_ctx->link_res, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1608 // Update verified link settings to current one
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1609 // Because DPIA LT might fallback to lower link setting.
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1610 if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1611 link->verified_link_cap.link_rate = link->cur_link_settings.link_rate;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1612 link->verified_link_cap.lane_count = link->cur_link_settings.lane_count;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1613 dm_helpers_dp_mst_update_branch_bandwidth(link->ctx, link);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1614 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1615 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1616 } else {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1617 status = dp_perform_link_training(
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1618 link,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1619 &pipe_ctx->link_res,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1620 &cur_link_settings,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1621 skip_video_pattern);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1622 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1623
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1624 dp_trace_lt_total_count_increment(link, false);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1625 dp_trace_lt_result_update(link, status, false);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1626 dp_trace_set_lt_end_timestamp(link, false);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1627 if (status == LINK_TRAINING_SUCCESS && !is_link_bw_low)
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1628 return true;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1629 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1630
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1631 fail_count++;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1632 dp_trace_lt_fail_count_update(link, fail_count, false);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1633 if (link->ep_type == DISPLAY_ENDPOINT_PHY) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1634 /* latest link training still fail or link training is aborted
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1635 * skip delay and keep PHY on
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1636 */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1637 if (j == (attempts - 1) || (status == LINK_TRAINING_ABORT))
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1638 break;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1639 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1640
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1641 DC_LOG_WARNING("%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d) : fail reason:(%d)\n",
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1642 __func__, link->link_index, (unsigned int)j + 1, attempts, cur_link_settings.link_rate,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1643 cur_link_settings.lane_count, status);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1644
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1645 dp_disable_link_phy(link, &pipe_ctx->link_res, signal);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1646
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1647 /* Abort link training if failure due to sink being unplugged. */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1648 if (status == LINK_TRAINING_ABORT) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1649 enum dc_connection_type type = dc_connection_none;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1650
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1651 dc_link_detect_sink(link, &type);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1652 if (type == dc_connection_none) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1653 DC_LOG_HW_LINK_TRAINING("%s: Aborting training because sink unplugged\n", __func__);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1654 break;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1655 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1656 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1657
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1658 /* Try to train again at original settings if:
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1659 * - not falling back between training attempts;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1660 * - aborted previous attempt due to reasons other than sink unplug;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1661 * - successfully trained but at a link rate lower than that required by stream;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1662 * - reached minimum link bandwidth.
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1663 */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1664 if (!do_fallback || (status == LINK_TRAINING_ABORT) ||
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1665 (status == LINK_TRAINING_SUCCESS && is_link_bw_low) ||
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1666 is_link_bw_min) {
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1667 j++;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1668 cur_link_settings = *link_setting;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1669 delay_between_attempts += LINK_TRAINING_RETRY_DELAY;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1670 is_link_bw_low = false;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1671 is_link_bw_min = (cur_link_settings.link_rate <= LINK_RATE_LOW) &&
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1672 (cur_link_settings.lane_count <= LANE_COUNT_ONE);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1673
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1674 } else if (do_fallback) { /* Try training at lower link bandwidth if doing fallback. */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1675 uint32_t req_bw;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1676 uint32_t link_bw;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1677
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1678 decide_fallback_link_setting(link, &max_link_settings,
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1679 &cur_link_settings, status);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1680 /* Flag if reduced link bandwidth no longer meets stream requirements or fallen back to
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1681 * minimum link bandwidth.
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1682 */
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1683 req_bw = dc_bandwidth_in_kbps_from_timing(&stream->timing);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1684 link_bw = dc_link_bandwidth_kbps(link, &cur_link_settings);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1685 is_link_bw_low = (req_bw > link_bw);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1686 is_link_bw_min = ((cur_link_settings.link_rate <= LINK_RATE_LOW) &&
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1687 (cur_link_settings.lane_count <= LANE_COUNT_ONE));
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1688
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1689 if (is_link_bw_low)
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1690 DC_LOG_WARNING(
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1691 "%s: Link(%d) bandwidth too low after fallback req_bw(%d) > link_bw(%d)\n",
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1692 __func__, link->link_index, req_bw, link_bw);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1693 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1694
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1695 msleep(delay_between_attempts);
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1696 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1697
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1698 return false;
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1699 }
630168a97314a8 drivers/gpu/drm/amd/display/dc/link/link_dp_training.c Wenjing Liu 2022-12-14 1700
:::::: The code at line 1585 was first introduced by commit
:::::: 630168a97314a8f6da9c09d73f5e78c3c1fe3eee drm/amd/display: move dp link training logic to link_dp_training
:::::: TO: Wenjing Liu <wenjing.liu@xxxxxxx>
:::::: CC: Alex Deucher <alexander.deucher@xxxxxxx>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests