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Date: Fri, 26 Nov 2021 08:05:51 +0800
From: kernel test robot <lkp@...el.com>
To: Fangzhi Zuo <Jerry.Zuo@....com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Alex Deucher <alexander.deucher@....com>,
Nicholas Kazlauskas <Nicholas.Kazlauskas@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3187:16:
warning: no previous prototype for 'dc_link_update_sst_payload'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8ced7ca3570333998ad2088d5a6275701970e28e
commit: f01ee019586220c86f238263a4fbde6e72085e11 drm/amd/display: Add DP 2.0 SST DC Support
date: 3 months ago
config: powerpc64-buildonly-randconfig-r004-20211026 (https://download.01.org/0day-ci/archive/20211126/202111260725.FgSyDs9i-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 11.2.0
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=f01ee019586220c86f238263a4fbde6e72085e11
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout f01ee019586220c86f238263a4fbde6e72085e11
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3187:16: warning: no previous prototype for 'dc_link_update_sst_payload' [-Wmissing-prototypes]
3187 | enum dc_status dc_link_update_sst_payload(struct pipe_ctx *pipe_ctx, bool allocate)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/dc_link_update_sst_payload +3187 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c
3133
3134 static void update_mst_stream_alloc_table(
3135 struct dc_link *link,
3136 struct stream_encoder *stream_enc,
3137 const struct dp_mst_stream_allocation_table *proposed_table)
3138 {
3139 struct link_mst_stream_allocation work_table[MAX_CONTROLLER_NUM] = {
3140 { 0 } };
3141 struct link_mst_stream_allocation *dc_alloc;
3142
3143 int i;
3144 int j;
3145
3146 /* if DRM proposed_table has more than one new payload */
3147 ASSERT(proposed_table->stream_count -
3148 link->mst_stream_alloc_table.stream_count < 2);
3149
3150 /* copy proposed_table to link, add stream encoder */
3151 for (i = 0; i < proposed_table->stream_count; i++) {
3152
3153 for (j = 0; j < link->mst_stream_alloc_table.stream_count; j++) {
3154 dc_alloc =
3155 &link->mst_stream_alloc_table.stream_allocations[j];
3156
3157 if (dc_alloc->vcp_id ==
3158 proposed_table->stream_allocations[i].vcp_id) {
3159
3160 work_table[i] = *dc_alloc;
3161 work_table[i].slot_count = proposed_table->stream_allocations[i].slot_count;
3162 break; /* exit j loop */
3163 }
3164 }
3165
3166 /* new vcp_id */
3167 if (j == link->mst_stream_alloc_table.stream_count) {
3168 work_table[i].vcp_id =
3169 proposed_table->stream_allocations[i].vcp_id;
3170 work_table[i].slot_count =
3171 proposed_table->stream_allocations[i].slot_count;
3172 work_table[i].stream_enc = stream_enc;
3173 }
3174 }
3175
3176 /* update link->mst_stream_alloc_table with work_table */
3177 link->mst_stream_alloc_table.stream_count =
3178 proposed_table->stream_count;
3179 for (i = 0; i < MAX_CONTROLLER_NUM; i++)
3180 link->mst_stream_alloc_table.stream_allocations[i] =
3181 work_table[i];
3182 }
3183 #if defined(CONFIG_DRM_AMD_DC_DCN)
3184 /*
3185 * Payload allocation/deallocation for SST introduced in DP2.0
3186 */
> 3187 enum dc_status dc_link_update_sst_payload(struct pipe_ctx *pipe_ctx, bool allocate)
3188 {
3189 struct dc_stream_state *stream = pipe_ctx->stream;
3190 struct dc_link *link = stream->link;
3191 struct hpo_dp_link_encoder *hpo_dp_link_encoder = link->hpo_dp_link_enc;
3192 struct hpo_dp_stream_encoder *hpo_dp_stream_encoder = pipe_ctx->stream_res.hpo_dp_stream_enc;
3193 struct link_mst_stream_allocation_table proposed_table = {0};
3194 struct fixed31_32 avg_time_slots_per_mtp;
3195 DC_LOGGER_INIT(link->ctx->logger);
3196
3197 /* slot X.Y for SST payload deallocate */
3198 if (!allocate) {
3199 avg_time_slots_per_mtp = dc_fixpt_from_int(0);
3200
3201 DC_LOG_DP2("SST Update Payload: set_throttled_vcp_size slot X.Y for SST stream"
3202 "X: %d "
3203 "Y: %d",
3204 dc_fixpt_floor(
3205 avg_time_slots_per_mtp),
3206 dc_fixpt_ceil(
3207 dc_fixpt_shl(
3208 dc_fixpt_sub_int(
3209 avg_time_slots_per_mtp,
3210 dc_fixpt_floor(
3211 avg_time_slots_per_mtp)),
3212 26)));
3213
3214 hpo_dp_link_encoder->funcs->set_throttled_vcp_size(
3215 hpo_dp_link_encoder,
3216 hpo_dp_stream_encoder->inst,
3217 avg_time_slots_per_mtp);
3218 }
3219
3220 /* calculate VC payload and update branch with new payload allocation table*/
3221 if (!dpcd_write_128b_132b_sst_payload_allocation_table(
3222 stream,
3223 link,
3224 &proposed_table,
3225 allocate)) {
3226 DC_LOG_ERROR("SST Update Payload: Failed to update "
3227 "allocation table for "
3228 "pipe idx: %d\n",
3229 pipe_ctx->pipe_idx);
3230 }
3231
3232 proposed_table.stream_allocations[0].hpo_dp_stream_enc = hpo_dp_stream_encoder;
3233
3234 ASSERT(proposed_table.stream_count == 1);
3235
3236 //TODO - DP2.0 Logging: Instead of hpo_dp_stream_enc pointer, log instance id
3237 DC_LOG_DP2("SST Update Payload: hpo_dp_stream_enc: %p "
3238 "vcp_id: %d "
3239 "slot_count: %d\n",
3240 (void *) proposed_table.stream_allocations[0].hpo_dp_stream_enc,
3241 proposed_table.stream_allocations[0].vcp_id,
3242 proposed_table.stream_allocations[0].slot_count);
3243
3244 /* program DP source TX for payload */
3245 hpo_dp_link_encoder->funcs->update_stream_allocation_table(
3246 hpo_dp_link_encoder,
3247 &proposed_table);
3248
3249 /* poll for ACT handled */
3250 if (!dpcd_poll_for_allocation_change_trigger(link)) {
3251 // Failures will result in blackscreen and errors logged
3252 BREAK_TO_DEBUGGER();
3253 }
3254
3255 /* slot X.Y for SST payload allocate */
3256 if (allocate) {
3257 avg_time_slots_per_mtp = calculate_sst_avg_time_slots_per_mtp(stream, link);
3258
3259 DC_LOG_DP2("SST Update Payload: "
3260 "slot.X: %d "
3261 "slot.Y: %d",
3262 dc_fixpt_floor(
3263 avg_time_slots_per_mtp),
3264 dc_fixpt_ceil(
3265 dc_fixpt_shl(
3266 dc_fixpt_sub_int(
3267 avg_time_slots_per_mtp,
3268 dc_fixpt_floor(
3269 avg_time_slots_per_mtp)),
3270 26)));
3271
3272 hpo_dp_link_encoder->funcs->set_throttled_vcp_size(
3273 hpo_dp_link_encoder,
3274 hpo_dp_stream_encoder->inst,
3275 avg_time_slots_per_mtp);
3276 }
3277
3278 /* Always return DC_OK.
3279 * If part of sequence fails, log failure(s) and show blackscreen
3280 */
3281 return DC_OK;
3282 }
3283 #endif
3284
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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