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Message-ID: <202511031813.c8c7mkXF-lkp@intel.com>
Date: Mon, 3 Nov 2025 18:54:29 +0800
From: kernel test robot <lkp@...el.com>
To: Wangao Wang <wangao.wang@....qualcomm.com>,
Vikash Garodia <vikash.garodia@....qualcomm.com>,
Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
Abhinav Kumar <abhinav.kumar@...ux.dev>,
Bryan O'Donoghue <bod@...nel.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org,
Wangao Wang <wangao.wang@....qualcomm.com>, quic_qiweil@...cinc.com,
quic_renjiang@...cinc.com
Subject: Re: [PATCH v2 1/5] media: qcom: iris: Improve format alignment for
encoder
Hi Wangao,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 13863a59e410cab46d26751941980dc8f088b9b3]
url: https://github.com/intel-lab-lkp/linux/commits/Wangao-Wang/media-qcom-iris-Improve-format-alignment-for-encoder/20251031-175803
base: 13863a59e410cab46d26751941980dc8f088b9b3
patch link: https://lore.kernel.org/r/20251031-iris_encoder_enhancements-v2-1-319cd75cbb45%40oss.qualcomm.com
patch subject: [PATCH v2 1/5] media: qcom: iris: Improve format alignment for encoder
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20251103/202511031813.c8c7mkXF-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project d2625a438020ad35330cda29c3def102c1687b1b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251103/202511031813.c8c7mkXF-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/202511031813.c8c7mkXF-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:236:7: warning: variable 'left_offset' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
236 | if (V4L2_TYPE_IS_CAPTURE(plane)) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/uapi/linux/videodev2.h:182:2: note: expanded from macro 'V4L2_TYPE_IS_CAPTURE'
182 | (V4L2_TYPE_IS_VALID(type) && !V4L2_TYPE_IS_OUTPUT(type))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:246:43: note: uninitialized use occurs here
246 | payload[0] = FIELD_PREP(GENMASK(31, 16), left_offset) | top_offset;
| ^~~~~~~~~~~
drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:236:3: note: remove the 'if' if its condition is always true
236 | if (V4L2_TYPE_IS_CAPTURE(plane)) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:236:7: warning: variable 'left_offset' is used uninitialized whenever '&&' condition is false [-Wsometimes-uninitialized]
236 | if (V4L2_TYPE_IS_CAPTURE(plane)) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/uapi/linux/videodev2.h:182:3: note: expanded from macro 'V4L2_TYPE_IS_CAPTURE'
182 | (V4L2_TYPE_IS_VALID(type) && !V4L2_TYPE_IS_OUTPUT(type))
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/uapi/linux/videodev2.h:165:2: note: expanded from macro 'V4L2_TYPE_IS_VALID'
165 | ((type) >= V4L2_BUF_TYPE_VIDEO_CAPTURE &&\
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
166 | (type) <= V4L2_BUF_TYPE_META_OUTPUT)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:246:43: note: uninitialized use occurs here
246 | payload[0] = FIELD_PREP(GENMASK(31, 16), left_offset) | top_offset;
| ^~~~~~~~~~~
drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:236:7: note: remove the '&&' if its condition is always true
236 | if (V4L2_TYPE_IS_CAPTURE(plane)) {
| ^
include/uapi/linux/videodev2.h:182:3: note: expanded from macro 'V4L2_TYPE_IS_CAPTURE'
182 | (V4L2_TYPE_IS_VALID(type) && !V4L2_TYPE_IS_OUTPUT(type))
| ^
include/uapi/linux/videodev2.h:165:2: note: expanded from macro 'V4L2_TYPE_IS_VALID'
165 | ((type) >= V4L2_BUF_TYPE_VIDEO_CAPTURE &&\
| ^
>> drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:236:7: warning: variable 'left_offset' is used uninitialized whenever '&&' condition is false [-Wsometimes-uninitialized]
236 | if (V4L2_TYPE_IS_CAPTURE(plane)) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/uapi/linux/videodev2.h:182:3: note: expanded from macro 'V4L2_TYPE_IS_CAPTURE'
182 | (V4L2_TYPE_IS_VALID(type) && !V4L2_TYPE_IS_OUTPUT(type))
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/uapi/linux/videodev2.h:165:3: note: expanded from macro 'V4L2_TYPE_IS_VALID'
165 | ((type) >= V4L2_BUF_TYPE_VIDEO_CAPTURE &&\
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:246:43: note: uninitialized use occurs here
246 | payload[0] = FIELD_PREP(GENMASK(31, 16), left_offset) | top_offset;
| ^~~~~~~~~~~
drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:236:7: note: remove the '&&' if its condition is always true
236 | if (V4L2_TYPE_IS_CAPTURE(plane)) {
| ^
include/uapi/linux/videodev2.h:182:3: note: expanded from macro 'V4L2_TYPE_IS_CAPTURE'
182 | (V4L2_TYPE_IS_VALID(type) && !V4L2_TYPE_IS_OUTPUT(type))
| ^
include/uapi/linux/videodev2.h:165:3: note: expanded from macro 'V4L2_TYPE_IS_VALID'
165 | ((type) >= V4L2_BUF_TYPE_VIDEO_CAPTURE &&\
| ^
drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c:217:17: note: initialize the variable 'left_offset' to silence this warning
217 | u32 left_offset, top_offset;
| ^
| = 0
3 warnings generated.
vim +236 drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
211
212 static int iris_hfi_gen2_set_crop_offsets(struct iris_inst *inst, u32 plane)
213 {
214 struct iris_inst_hfi_gen2 *inst_hfi_gen2 = to_iris_inst_hfi_gen2(inst);
215 u32 port = iris_hfi_gen2_get_port(inst, plane);
216 u32 bottom_offset, right_offset;
217 u32 left_offset, top_offset;
218 u32 codec_align;
219 u32 payload[2];
220
221 codec_align = inst->codec == V4L2_PIX_FMT_HEVC ? 32 : 16;
222
223 if (inst->domain == DECODER) {
224 if (V4L2_TYPE_IS_OUTPUT(plane)) {
225 bottom_offset = (inst->fmt_src->fmt.pix_mp.height - inst->crop.height);
226 right_offset = (inst->fmt_src->fmt.pix_mp.width - inst->crop.width);
227 left_offset = inst->crop.left;
228 top_offset = inst->crop.top;
229 } else {
230 bottom_offset = (inst->fmt_dst->fmt.pix_mp.height - inst->compose.height);
231 right_offset = (inst->fmt_dst->fmt.pix_mp.width - inst->compose.width);
232 left_offset = inst->compose.left;
233 top_offset = inst->compose.top;
234 }
235 } else {
> 236 if (V4L2_TYPE_IS_CAPTURE(plane)) {
237 bottom_offset = (ALIGN(inst->enc_raw_height, codec_align) -
238 inst->enc_raw_height);
239 right_offset = (ALIGN(inst->enc_raw_width, codec_align) -
240 inst->enc_raw_width);
241 left_offset = inst->crop.left;
242 top_offset = inst->crop.top;
243 }
244 }
245
246 payload[0] = FIELD_PREP(GENMASK(31, 16), left_offset) | top_offset;
247 payload[1] = FIELD_PREP(GENMASK(31, 16), right_offset) | bottom_offset;
248 inst_hfi_gen2->src_subcr_params.crop_offsets[0] = payload[0];
249 inst_hfi_gen2->src_subcr_params.crop_offsets[1] = payload[1];
250
251 return iris_hfi_gen2_session_set_property(inst,
252 HFI_PROP_CROP_OFFSETS,
253 HFI_HOST_FLAGS_NONE,
254 port,
255 HFI_PAYLOAD_64_PACKED,
256 &payload,
257 sizeof(u64));
258 }
259
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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