drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:547:28: warning: variable 'status' set but not used

From: kernel test robot
Date: Wed Jun 17 2020 - 19:50:13 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 1b5044021070efa3259f3e9548dc35d1eb6aa844
commit: fe8db3bcf2e5f9d9056f923b12c7158d6541e435 drm/amd/display: query hdcp capability during link detect
date: 10 weeks ago
config: arc-randconfig-r036-20200617 (attached as .config)
compiler: arc-elf-gcc (GCC) 9.3.0
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 checkout fe8db3bcf2e5f9d9056f923b12c7158d6541e435
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c: In function 'query_hdcp_capability':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:547:28: warning: variable 'status' set but not used [-Wunused-but-set-variable]
547 | enum hdcp_message_status status = HDCP_MESSAGE_UNSUPPORTED;
| ^~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:85,
from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/resource.h:28,
from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:42:
At top level:
drivers/gpu/drm/amd/amdgpu/../display/dc/inc/hw/dpp.h:50:42: warning: 'dpp_input_csc_matrix' defined but not used [-Wunused-const-variable=]
50 | static const struct dpp_input_csc_matrix dpp_input_csc_matrix[] = {
| ^~~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/dc_link_ddc.h:29,
from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:36:
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:124:22: warning: 'DP_DVI_CONVERTER_ID_4' defined but not used [-Wunused-const-variable=]
124 | static const uint8_t DP_DVI_CONVERTER_ID_4[] = "m2DVIa";
| ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:122:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_3' defined but not used [-Wunused-const-variable=]
122 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:120:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_2' defined but not used [-Wunused-const-variable=]
120 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT";
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:33,
from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:30,
from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:37,
from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:28:
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:76:32: warning: 'dc_fixpt_ln2_div_2' defined but not used [-Wunused-const-variable=]
76 | static const struct fixed31_32 dc_fixpt_ln2_div_2 = { 1488522236LL };
| ^~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:75:32: warning: 'dc_fixpt_ln2' defined but not used [-Wunused-const-variable=]
75 | static const struct fixed31_32 dc_fixpt_ln2 = { 2977044471LL };
| ^~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:74:32: warning: 'dc_fixpt_e' defined but not used [-Wunused-const-variable=]
74 | static const struct fixed31_32 dc_fixpt_e = { 11674931555LL };
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:73:32: warning: 'dc_fixpt_two_pi' defined but not used [-Wunused-const-variable=]
73 | static const struct fixed31_32 dc_fixpt_two_pi = { 26986075409LL };
| ^~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:72:32: warning: 'dc_fixpt_pi' defined but not used [-Wunused-const-variable=]
72 | static const struct fixed31_32 dc_fixpt_pi = { 13493037705LL };
| ^~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:67:32: warning: 'dc_fixpt_zero' defined but not used [-Wunused-const-variable=]
67 | static const struct fixed31_32 dc_fixpt_zero = { 0 };
| ^~~~~~~~~~~~~

vim +/status +547 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c

517
518 #if defined(CONFIG_DRM_AMD_DC_HDCP)
519 static void query_hdcp_capability(enum signal_type signal, struct dc_link *link)
520 {
521 struct hdcp_protection_message msg22;
522 struct hdcp_protection_message msg14;
523
524 memset(&msg22, 0, sizeof(struct hdcp_protection_message));
525 memset(&msg14, 0, sizeof(struct hdcp_protection_message));
526 memset(link->hdcp_caps.rx_caps.raw, 0,
527 sizeof(link->hdcp_caps.rx_caps.raw));
528
529 if ((link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT &&
530 link->ddc->transaction_type ==
531 DDC_TRANSACTION_TYPE_I2C_OVER_AUX) ||
532 link->connector_signal == SIGNAL_TYPE_EDP) {
533 msg22.data = link->hdcp_caps.rx_caps.raw;
534 msg22.length = sizeof(link->hdcp_caps.rx_caps.raw);
535 msg22.msg_id = HDCP_MESSAGE_ID_RX_CAPS;
536 } else {
537 msg22.data = &link->hdcp_caps.rx_caps.fields.version;
538 msg22.length = sizeof(link->hdcp_caps.rx_caps.fields.version);
539 msg22.msg_id = HDCP_MESSAGE_ID_HDCP2VERSION;
540 }
541 msg22.version = HDCP_VERSION_22;
542 msg22.link = HDCP_LINK_PRIMARY;
543 msg22.max_retries = 5;
544 dc_process_hdcp_msg(signal, link, &msg22);
545
546 if (signal == SIGNAL_TYPE_DISPLAY_PORT || signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
> 547 enum hdcp_message_status status = HDCP_MESSAGE_UNSUPPORTED;
548
549 msg14.data = &link->hdcp_caps.bcaps.raw;
550 msg14.length = sizeof(link->hdcp_caps.bcaps.raw);
551 msg14.msg_id = HDCP_MESSAGE_ID_READ_BCAPS;
552 msg14.version = HDCP_VERSION_14;
553 msg14.link = HDCP_LINK_PRIMARY;
554 msg14.max_retries = 5;
555
556 status = dc_process_hdcp_msg(signal, link, &msg14);
557 }
558

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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