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Date: Tue, 25 Oct 2022 11:18:13 +0800
From: kernel test robot <lkp@...el.com>
To: Lewis Huang <Lewis.Huang@....com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Alex Deucher <alexander.deucher@....com>,
Wenjing Liu <Wenjing.Liu@....com>
Subject: [agd5f:drm-next 77/81]
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:5044:24: warning:
implicit conversion from 'enum <anonymous>' to 'enum dc_status'
tree: https://gitlab.freedesktop.org/agd5f/linux.git drm-next
head: 34d84636e5e09521d031863a01f9b9fb22ffa875
commit: b473bd5fc333ab02479444dd4a51be5f5e324d97 [77/81] drm/amd/display: refine wake up aux in retrieve link caps
config: sparc-allyesconfig
compiler: sparc64-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
git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git
git fetch --no-tags agd5f drm-next
git checkout b473bd5fc333ab02479444dd4a51be5f5e324d97
# 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=sparc SHELL=/bin/bash drivers/gpu/drm/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c: In function 'dp_retrieve_lttpr_cap':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:5044:24: warning: implicit conversion from 'enum <anonymous>' to 'enum dc_status' [-Wenum-conversion]
5044 | return false;
| ^~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c: At top level:
>> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:5230:16: warning: no previous prototype for 'wake_up_aux_channel' [-Wmissing-prototypes]
5230 | enum dc_status wake_up_aux_channel(struct dc_link *link)
| ^~~~~~~~~~~~~~~~~~~
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/resource.h:28,
from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:31:
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:137:22: warning: 'SYNAPTICS_DEVICE_ID' defined but not used [-Wunused-const-variable=]
137 | static const uint8_t SYNAPTICS_DEVICE_ID[] = "SYNA";
| ^~~~~~~~~~~~~~~~~~~
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};
| ^~~~~~~~~~~~~~~~~~~~~~~
vim +5044 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c
96577cf82a1331 Hersen Wu 2020-01-14 5033
b473bd5fc333ab Lewis Huang 2022-10-20 5034 enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link)
77361ed89a8b03 Jimmy Kizito 2022-03-24 5035 {
77361ed89a8b03 Jimmy Kizito 2022-03-24 5036 uint8_t lttpr_dpcd_data[8];
77361ed89a8b03 Jimmy Kizito 2022-03-24 5037 enum dc_status status = DC_ERROR_UNEXPECTED;
77361ed89a8b03 Jimmy Kizito 2022-03-24 5038 bool is_lttpr_present = false;
77361ed89a8b03 Jimmy Kizito 2022-03-24 5039
e844cc250f33d2 Michael Strauss 2022-07-25 5040 /* Logic to determine LTTPR support*/
e844cc250f33d2 Michael Strauss 2022-07-25 5041 bool vbios_lttpr_interop = link->dc->caps.vbios_lttpr_aware;
0bbd1c7de319ca George Shen 2022-01-31 5042
e844cc250f33d2 Michael Strauss 2022-07-25 5043 if (!vbios_lttpr_interop || !link->dc->caps.extended_aux_timeout_support)
e844cc250f33d2 Michael Strauss 2022-07-25 @5044 return false;
0bbd1c7de319ca George Shen 2022-01-31 5045
c797ede0ec89f1 Wenjing Liu 2020-06-01 5046 /* By reading LTTPR capability, RX assumes that we will enable
7809fc00e20e6e Wesley Chalmers 2021-03-17 5047 * LTTPR extended aux timeout if LTTPR is present.
c797ede0ec89f1 Wenjing Liu 2020-06-01 5048 */
e844cc250f33d2 Michael Strauss 2022-07-25 5049 status = core_link_read_dpcd(link,
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5050 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV,
4d1d699f479dc8 Michael Strauss 2022-05-06 5051 lttpr_dpcd_data,
4d1d699f479dc8 Michael Strauss 2022-05-06 5052 sizeof(lttpr_dpcd_data));
3b90318d44f87a Michael Strauss 2022-04-22 5053
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5054 link->dpcd_caps.lttpr_caps.revision.raw =
4d1d699f479dc8 Michael Strauss 2022-05-06 5055 lttpr_dpcd_data[DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV -
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5056 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
8e5100a575433c abdoulaye berthe 2019-07-19 5057
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5058 link->dpcd_caps.lttpr_caps.max_link_rate =
4d1d699f479dc8 Michael Strauss 2022-05-06 5059 lttpr_dpcd_data[DP_MAX_LINK_RATE_PHY_REPEATER -
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5060 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
8e5100a575433c abdoulaye berthe 2019-07-19 5061
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5062 link->dpcd_caps.lttpr_caps.phy_repeater_cnt =
4d1d699f479dc8 Michael Strauss 2022-05-06 5063 lttpr_dpcd_data[DP_PHY_REPEATER_CNT -
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5064 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
8e5100a575433c abdoulaye berthe 2019-07-19 5065
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5066 link->dpcd_caps.lttpr_caps.max_lane_count =
4d1d699f479dc8 Michael Strauss 2022-05-06 5067 lttpr_dpcd_data[DP_MAX_LANE_COUNT_PHY_REPEATER -
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5068 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
8e5100a575433c abdoulaye berthe 2019-07-19 5069
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5070 link->dpcd_caps.lttpr_caps.mode =
4d1d699f479dc8 Michael Strauss 2022-05-06 5071 lttpr_dpcd_data[DP_PHY_REPEATER_MODE -
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5072 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
8e5100a575433c abdoulaye berthe 2019-07-19 5073
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5074 link->dpcd_caps.lttpr_caps.max_ext_timeout =
4d1d699f479dc8 Michael Strauss 2022-05-06 5075 lttpr_dpcd_data[DP_PHY_REPEATER_EXTENDED_WAIT_TIMEOUT -
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5076 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
f01ee019586220 Fangzhi Zuo 2021-08-03 5077 link->dpcd_caps.lttpr_caps.main_link_channel_coding.raw =
4d1d699f479dc8 Michael Strauss 2022-05-06 5078 lttpr_dpcd_data[DP_MAIN_LINK_CHANNEL_CODING_PHY_REPEATER -
f01ee019586220 Fangzhi Zuo 2021-08-03 5079 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
f01ee019586220 Fangzhi Zuo 2021-08-03 5080
f01ee019586220 Fangzhi Zuo 2021-08-03 5081 link->dpcd_caps.lttpr_caps.supported_128b_132b_rates.raw =
4d1d699f479dc8 Michael Strauss 2022-05-06 5082 lttpr_dpcd_data[DP_PHY_REPEATER_128B132B_RATES -
f01ee019586220 Fangzhi Zuo 2021-08-03 5083 DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
f01ee019586220 Fangzhi Zuo 2021-08-03 5084
47c2790ad69d1f Michael Strauss 2022-08-31 5085 /* If this chip cap is set, at least one retimer must exist in the chain
e844cc250f33d2 Michael Strauss 2022-07-25 5086 * Override count to 1 if we receive a known bad count (0 or an invalid value)
e844cc250f33d2 Michael Strauss 2022-07-25 5087 */
47c2790ad69d1f Michael Strauss 2022-08-31 5088 if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN &&
47c2790ad69d1f Michael Strauss 2022-08-31 5089 (dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) == 0)) {
47c2790ad69d1f Michael Strauss 2022-08-31 5090 ASSERT(0);
47c2790ad69d1f Michael Strauss 2022-08-31 5091 link->dpcd_caps.lttpr_caps.phy_repeater_cnt = 0x80;
345d6493476615 Leo Chen 2022-09-16 5092 DC_LOG_DC("lttpr_caps forced phy_repeater_cnt = %d\n", link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
47c2790ad69d1f Michael Strauss 2022-08-31 5093 }
47c2790ad69d1f Michael Strauss 2022-08-31 5094
ede4f6dac99e4b Jimmy Kizito 2021-04-05 5095 /* Attempt to train in LTTPR transparent mode if repeater count exceeds 8. */
e844cc250f33d2 Michael Strauss 2022-07-25 5096 is_lttpr_present = dp_is_lttpr_present(link);
e844cc250f33d2 Michael Strauss 2022-07-25 5097
e844cc250f33d2 Michael Strauss 2022-07-25 5098 if (is_lttpr_present)
e844cc250f33d2 Michael Strauss 2022-07-25 5099 CONN_DATA_DETECT(link, lttpr_dpcd_data, sizeof(lttpr_dpcd_data), "LTTPR Caps: ");
e844cc250f33d2 Michael Strauss 2022-07-25 5100
345d6493476615 Leo Chen 2022-09-16 5101 DC_LOG_DC("is_lttpr_present = %d\n", is_lttpr_present);
b473bd5fc333ab Lewis Huang 2022-10-20 5102 return status;
e844cc250f33d2 Michael Strauss 2022-07-25 5103 }
e844cc250f33d2 Michael Strauss 2022-07-25 5104
e844cc250f33d2 Michael Strauss 2022-07-25 5105 bool dp_is_lttpr_present(struct dc_link *link)
e844cc250f33d2 Michael Strauss 2022-07-25 5106 {
e844cc250f33d2 Michael Strauss 2022-07-25 5107 return (dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt) != 0 &&
e844cc250f33d2 Michael Strauss 2022-07-25 5108 link->dpcd_caps.lttpr_caps.max_lane_count > 0 &&
61aa7a6f760e78 abdoulaye berthe 2019-10-10 5109 link->dpcd_caps.lttpr_caps.max_lane_count <= 4 &&
c797ede0ec89f1 Wenjing Liu 2020-06-01 5110 link->dpcd_caps.lttpr_caps.revision.raw >= 0x14);
4d1d699f479dc8 Michael Strauss 2022-05-06 5111 }
e844cc250f33d2 Michael Strauss 2022-07-25 5112
e844cc250f33d2 Michael Strauss 2022-07-25 5113 enum lttpr_mode dp_decide_lttpr_mode(struct dc_link *link, struct dc_link_settings *link_setting)
e844cc250f33d2 Michael Strauss 2022-07-25 5114 {
e844cc250f33d2 Michael Strauss 2022-07-25 5115 enum dp_link_encoding encoding = dp_get_link_encoding_format(link_setting);
e844cc250f33d2 Michael Strauss 2022-07-25 5116
e844cc250f33d2 Michael Strauss 2022-07-25 5117 if (encoding == DP_8b_10b_ENCODING)
e844cc250f33d2 Michael Strauss 2022-07-25 5118 return dp_decide_8b_10b_lttpr_mode(link);
e844cc250f33d2 Michael Strauss 2022-07-25 5119 else if (encoding == DP_128b_132b_ENCODING)
e844cc250f33d2 Michael Strauss 2022-07-25 5120 return dp_decide_128b_132b_lttpr_mode(link);
e844cc250f33d2 Michael Strauss 2022-07-25 5121
e844cc250f33d2 Michael Strauss 2022-07-25 5122 ASSERT(0);
e844cc250f33d2 Michael Strauss 2022-07-25 5123 return LTTPR_MODE_NON_LTTPR;
e844cc250f33d2 Michael Strauss 2022-07-25 5124 }
e844cc250f33d2 Michael Strauss 2022-07-25 5125
e844cc250f33d2 Michael Strauss 2022-07-25 5126 void dp_get_lttpr_mode_override(struct dc_link *link, enum lttpr_mode *override)
e844cc250f33d2 Michael Strauss 2022-07-25 5127 {
e844cc250f33d2 Michael Strauss 2022-07-25 5128 if (!dp_is_lttpr_present(link))
e844cc250f33d2 Michael Strauss 2022-07-25 5129 return;
e844cc250f33d2 Michael Strauss 2022-07-25 5130
e844cc250f33d2 Michael Strauss 2022-07-25 5131 if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_TRANSPARENT) {
e844cc250f33d2 Michael Strauss 2022-07-25 5132 *override = LTTPR_MODE_TRANSPARENT;
e844cc250f33d2 Michael Strauss 2022-07-25 5133 } else if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_NON_TRANSPARENT) {
e844cc250f33d2 Michael Strauss 2022-07-25 5134 *override = LTTPR_MODE_NON_TRANSPARENT;
e844cc250f33d2 Michael Strauss 2022-07-25 5135 } else if (link->dc->debug.lttpr_mode_override == LTTPR_MODE_NON_LTTPR) {
e844cc250f33d2 Michael Strauss 2022-07-25 5136 *override = LTTPR_MODE_NON_LTTPR;
e844cc250f33d2 Michael Strauss 2022-07-25 5137 }
345d6493476615 Leo Chen 2022-09-16 5138 DC_LOG_DC("lttpr_mode_override chose LTTPR_MODE = %d\n", (uint8_t)(*override));
e844cc250f33d2 Michael Strauss 2022-07-25 5139 }
e844cc250f33d2 Michael Strauss 2022-07-25 5140
e844cc250f33d2 Michael Strauss 2022-07-25 5141 enum lttpr_mode dp_decide_8b_10b_lttpr_mode(struct dc_link *link)
e844cc250f33d2 Michael Strauss 2022-07-25 5142 {
e844cc250f33d2 Michael Strauss 2022-07-25 5143 bool is_lttpr_present = dp_is_lttpr_present(link);
e844cc250f33d2 Michael Strauss 2022-07-25 5144 bool vbios_lttpr_force_non_transparent = link->dc->caps.vbios_lttpr_enable;
e844cc250f33d2 Michael Strauss 2022-07-25 5145 bool vbios_lttpr_aware = link->dc->caps.vbios_lttpr_aware;
e844cc250f33d2 Michael Strauss 2022-07-25 5146
e844cc250f33d2 Michael Strauss 2022-07-25 5147 if (!is_lttpr_present)
e844cc250f33d2 Michael Strauss 2022-07-25 5148 return LTTPR_MODE_NON_LTTPR;
e844cc250f33d2 Michael Strauss 2022-07-25 5149
e844cc250f33d2 Michael Strauss 2022-07-25 5150 if (vbios_lttpr_aware) {
345d6493476615 Leo Chen 2022-09-16 5151 if (vbios_lttpr_force_non_transparent) {
345d6493476615 Leo Chen 2022-09-16 5152 DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT due to VBIOS DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE set to 1.\n");
e844cc250f33d2 Michael Strauss 2022-07-25 5153 return LTTPR_MODE_NON_TRANSPARENT;
345d6493476615 Leo Chen 2022-09-16 5154 } else {
345d6493476615 Leo Chen 2022-09-16 5155 DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT by default due to VBIOS not set DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE set to 1.\n");
e844cc250f33d2 Michael Strauss 2022-07-25 5156 return LTTPR_MODE_TRANSPARENT;
e844cc250f33d2 Michael Strauss 2022-07-25 5157 }
345d6493476615 Leo Chen 2022-09-16 5158 }
e844cc250f33d2 Michael Strauss 2022-07-25 5159
e844cc250f33d2 Michael Strauss 2022-07-25 5160 if (link->dc->config.allow_lttpr_non_transparent_mode.bits.DP1_4A &&
345d6493476615 Leo Chen 2022-09-16 5161 link->dc->caps.extended_aux_timeout_support) {
345d6493476615 Leo Chen 2022-09-16 5162 DC_LOG_DC("chose LTTPR_MODE_NON_TRANSPARENT by default and dc->config.allow_lttpr_non_transparent_mode.bits.DP1_4A set to 1.\n");
e844cc250f33d2 Michael Strauss 2022-07-25 5163 return LTTPR_MODE_NON_TRANSPARENT;
345d6493476615 Leo Chen 2022-09-16 5164 }
e844cc250f33d2 Michael Strauss 2022-07-25 5165
345d6493476615 Leo Chen 2022-09-16 5166 DC_LOG_DC("chose LTTPR_MODE_NON_LTTPR.\n");
e844cc250f33d2 Michael Strauss 2022-07-25 5167 return LTTPR_MODE_NON_LTTPR;
e844cc250f33d2 Michael Strauss 2022-07-25 5168 }
e844cc250f33d2 Michael Strauss 2022-07-25 5169
e844cc250f33d2 Michael Strauss 2022-07-25 5170 enum lttpr_mode dp_decide_128b_132b_lttpr_mode(struct dc_link *link)
e844cc250f33d2 Michael Strauss 2022-07-25 5171 {
345d6493476615 Leo Chen 2022-09-16 5172 enum lttpr_mode mode = LTTPR_MODE_NON_LTTPR;
345d6493476615 Leo Chen 2022-09-16 5173
345d6493476615 Leo Chen 2022-09-16 5174 if (dp_is_lttpr_present(link))
345d6493476615 Leo Chen 2022-09-16 5175 mode = LTTPR_MODE_NON_TRANSPARENT;
345d6493476615 Leo Chen 2022-09-16 5176
345d6493476615 Leo Chen 2022-09-16 5177 DC_LOG_DC("128b_132b chose LTTPR_MODE %d.\n", mode);
345d6493476615 Leo Chen 2022-09-16 5178 return mode;
ee9b1992f1fdf3 Wesley Chalmers 2021-05-14 5179 }
ee9b1992f1fdf3 Wesley Chalmers 2021-05-14 5180
c595fb05e392a5 Wenjing Liu 2022-02-08 5181 static bool get_usbc_cable_id(struct dc_link *link, union dp_cable_id *cable_id)
c595fb05e392a5 Wenjing Liu 2022-02-08 5182 {
c595fb05e392a5 Wenjing Liu 2022-02-08 5183 union dmub_rb_cmd cmd;
c595fb05e392a5 Wenjing Liu 2022-02-08 5184
c595fb05e392a5 Wenjing Liu 2022-02-08 5185 if (!link->ctx->dmub_srv ||
c595fb05e392a5 Wenjing Liu 2022-02-08 5186 link->ep_type != DISPLAY_ENDPOINT_PHY ||
c595fb05e392a5 Wenjing Liu 2022-02-08 5187 link->link_enc->features.flags.bits.DP_IS_USB_C == 0)
c595fb05e392a5 Wenjing Liu 2022-02-08 5188 return false;
c595fb05e392a5 Wenjing Liu 2022-02-08 5189
c595fb05e392a5 Wenjing Liu 2022-02-08 5190 memset(&cmd, 0, sizeof(cmd));
c595fb05e392a5 Wenjing Liu 2022-02-08 5191 cmd.cable_id.header.type = DMUB_CMD_GET_USBC_CABLE_ID;
c595fb05e392a5 Wenjing Liu 2022-02-08 5192 cmd.cable_id.header.payload_bytes = sizeof(cmd.cable_id.data);
c595fb05e392a5 Wenjing Liu 2022-02-08 5193 cmd.cable_id.data.input.phy_inst = resource_transmitter_to_phy_idx(
c595fb05e392a5 Wenjing Liu 2022-02-08 5194 link->dc, link->link_enc->transmitter);
c595fb05e392a5 Wenjing Liu 2022-02-08 5195 if (dc_dmub_srv_cmd_with_reply_data(link->ctx->dmub_srv, &cmd) &&
345d6493476615 Leo Chen 2022-09-16 5196 cmd.cable_id.header.ret_status == 1) {
c595fb05e392a5 Wenjing Liu 2022-02-08 5197 cable_id->raw = cmd.cable_id.data.output_raw;
345d6493476615 Leo Chen 2022-09-16 5198 DC_LOG_DC("usbc_cable_id = %d.\n", cable_id->raw);
345d6493476615 Leo Chen 2022-09-16 5199 }
c595fb05e392a5 Wenjing Liu 2022-02-08 5200 return cmd.cable_id.header.ret_status == 1;
c595fb05e392a5 Wenjing Liu 2022-02-08 5201 }
c595fb05e392a5 Wenjing Liu 2022-02-08 5202
c595fb05e392a5 Wenjing Liu 2022-02-08 5203 static union dp_cable_id intersect_cable_id(
c595fb05e392a5 Wenjing Liu 2022-02-08 5204 union dp_cable_id *a, union dp_cable_id *b)
4a3ad932b2c538 Shen, George 2022-01-23 5205 {
c595fb05e392a5 Wenjing Liu 2022-02-08 5206 union dp_cable_id out;
c595fb05e392a5 Wenjing Liu 2022-02-08 5207
c595fb05e392a5 Wenjing Liu 2022-02-08 5208 out.bits.UHBR10_20_CAPABILITY = MIN(a->bits.UHBR10_20_CAPABILITY,
c595fb05e392a5 Wenjing Liu 2022-02-08 5209 b->bits.UHBR10_20_CAPABILITY);
c595fb05e392a5 Wenjing Liu 2022-02-08 5210 out.bits.UHBR13_5_CAPABILITY = MIN(a->bits.UHBR13_5_CAPABILITY,
c595fb05e392a5 Wenjing Liu 2022-02-08 5211 b->bits.UHBR13_5_CAPABILITY);
c595fb05e392a5 Wenjing Liu 2022-02-08 5212 out.bits.CABLE_TYPE = MAX(a->bits.CABLE_TYPE, b->bits.CABLE_TYPE);
c595fb05e392a5 Wenjing Liu 2022-02-08 5213
c595fb05e392a5 Wenjing Liu 2022-02-08 5214 return out;
c595fb05e392a5 Wenjing Liu 2022-02-08 5215 }
c595fb05e392a5 Wenjing Liu 2022-02-08 5216
c595fb05e392a5 Wenjing Liu 2022-02-08 5217 static void retrieve_cable_id(struct dc_link *link)
c595fb05e392a5 Wenjing Liu 2022-02-08 5218 {
c595fb05e392a5 Wenjing Liu 2022-02-08 5219 union dp_cable_id usbc_cable_id;
c595fb05e392a5 Wenjing Liu 2022-02-08 5220
c595fb05e392a5 Wenjing Liu 2022-02-08 5221 link->dpcd_caps.cable_id.raw = 0;
c595fb05e392a5 Wenjing Liu 2022-02-08 5222 core_link_read_dpcd(link, DP_CABLE_ATTRIBUTES_UPDATED_BY_DPRX,
c595fb05e392a5 Wenjing Liu 2022-02-08 5223 &link->dpcd_caps.cable_id.raw, sizeof(uint8_t));
c595fb05e392a5 Wenjing Liu 2022-02-08 5224
c595fb05e392a5 Wenjing Liu 2022-02-08 5225 if (get_usbc_cable_id(link, &usbc_cable_id))
c595fb05e392a5 Wenjing Liu 2022-02-08 5226 link->dpcd_caps.cable_id = intersect_cable_id(
c595fb05e392a5 Wenjing Liu 2022-02-08 5227 &link->dpcd_caps.cable_id, &usbc_cable_id);
4a3ad932b2c538 Shen, George 2022-01-23 5228 }
4a3ad932b2c538 Shen, George 2022-01-23 5229
b473bd5fc333ab Lewis Huang 2022-10-20 @5230 enum dc_status wake_up_aux_channel(struct dc_link *link)
2944dbedc7e167 Jimmy Kizito 2022-03-09 5231 {
2944dbedc7e167 Jimmy Kizito 2022-03-09 5232 enum dc_status status = DC_ERROR_UNEXPECTED;
b473bd5fc333ab Lewis Huang 2022-10-20 5233 uint32_t aux_channel_retry_cnt = 0;
b473bd5fc333ab Lewis Huang 2022-10-20 5234 uint8_t dpcd_power_state = '\0';
2944dbedc7e167 Jimmy Kizito 2022-03-09 5235
b473bd5fc333ab Lewis Huang 2022-10-20 5236 while (status != DC_OK && aux_channel_retry_cnt < 10) {
b473bd5fc333ab Lewis Huang 2022-10-20 5237 status = core_link_read_dpcd(link, DP_SET_POWER,
b473bd5fc333ab Lewis Huang 2022-10-20 5238 &dpcd_power_state, sizeof(dpcd_power_state));
77361ed89a8b03 Jimmy Kizito 2022-03-24 5239
b473bd5fc333ab Lewis Huang 2022-10-20 5240 /* Delay 1 ms if AUX CH is in power down state. Based on spec
b473bd5fc333ab Lewis Huang 2022-10-20 5241 * section 2.3.1.2, if AUX CH may be powered down due to
b473bd5fc333ab Lewis Huang 2022-10-20 5242 * write to DPCD 600h = 2. Sink AUX CH is monitoring differential
b473bd5fc333ab Lewis Huang 2022-10-20 5243 * signal and may need up to 1 ms before being able to reply.
77361ed89a8b03 Jimmy Kizito 2022-03-24 5244 */
b473bd5fc333ab Lewis Huang 2022-10-20 5245 if (status != DC_OK || dpcd_power_state == DP_SET_POWER_D3) {
b473bd5fc333ab Lewis Huang 2022-10-20 5246 udelay(1000);
b473bd5fc333ab Lewis Huang 2022-10-20 5247 aux_channel_retry_cnt++;
b473bd5fc333ab Lewis Huang 2022-10-20 5248 }
b473bd5fc333ab Lewis Huang 2022-10-20 5249 }
2944dbedc7e167 Jimmy Kizito 2022-03-09 5250
2944dbedc7e167 Jimmy Kizito 2022-03-09 5251 if (status != DC_OK) {
b473bd5fc333ab Lewis Huang 2022-10-20 5252 dpcd_power_state = DP_SET_POWER_D0;
2944dbedc7e167 Jimmy Kizito 2022-03-09 5253 status = core_link_write_dpcd(
2944dbedc7e167 Jimmy Kizito 2022-03-09 5254 link,
2944dbedc7e167 Jimmy Kizito 2022-03-09 5255 DP_SET_POWER,
b473bd5fc333ab Lewis Huang 2022-10-20 5256 &dpcd_power_state,
b473bd5fc333ab Lewis Huang 2022-10-20 5257 sizeof(dpcd_power_state));
2944dbedc7e167 Jimmy Kizito 2022-03-09 5258
b473bd5fc333ab Lewis Huang 2022-10-20 5259 dpcd_power_state = DP_SET_POWER_D3;
2944dbedc7e167 Jimmy Kizito 2022-03-09 5260 status = core_link_write_dpcd(
2944dbedc7e167 Jimmy Kizito 2022-03-09 5261 link,
2944dbedc7e167 Jimmy Kizito 2022-03-09 5262 DP_SET_POWER,
b473bd5fc333ab Lewis Huang 2022-10-20 5263 &dpcd_power_state,
b473bd5fc333ab Lewis Huang 2022-10-20 5264 sizeof(dpcd_power_state));
b473bd5fc333ab Lewis Huang 2022-10-20 5265 return DC_ERROR_UNEXPECTED;
2944dbedc7e167 Jimmy Kizito 2022-03-09 5266 }
2944dbedc7e167 Jimmy Kizito 2022-03-09 5267
b473bd5fc333ab Lewis Huang 2022-10-20 5268 return DC_OK;
2944dbedc7e167 Jimmy Kizito 2022-03-09 5269 }
2944dbedc7e167 Jimmy Kizito 2022-03-09 5270
:::::: The code at line 5044 was first introduced by commit
:::::: e844cc250f33d207077d0af9337484d6c94048f0 drm/amd/display: Refactor LTTPR mode selection
:::::: TO: Michael Strauss <michael.strauss@....com>
:::::: CC: Alex Deucher <alexander.deucher@....com>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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