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Subjectdrivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_resource.c:1617:6: warning: no previous prototype for 'is_timing_changed'
Hi Roman,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7001052160d172f6de06adeffde24dde9935ece8
commit: 17ce8a6907f77b7ac97ddaa071d8a1f6e06ce85b drm/amd/display: Add dsc pre-validation in atomic check
date: 6 weeks ago
config: arc-randconfig-r003-20220327 (https://download.01.org/0day-ci/archive/20220328/202203280415.IGMBaNAP-lkp@intel.com/config)
compiler: arceb-elf-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=17ce8a6907f77b7ac97ddaa071d8a1f6e06ce85b
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 17ce8a6907f77b7ac97ddaa071d8a1f6e06ce85b
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_resource.c:1617:6: warning: no previous prototype for 'is_timing_changed' [-Wmissing-prototypes]
1617 | bool is_timing_changed(struct dc_stream_state *cur_stream,
| ^~~~~~~~~~~~~~~~~
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_resource.c:30:
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:127:22: warning: 'SYNAPTICS_DEVICE_ID' defined but not used [-Wunused-const-variable=]
127 | static const uint8_t SYNAPTICS_DEVICE_ID[] = "SYNA";
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:124:22: warning: 'DP_SINK_DEVICE_STR_ID_2' defined but not used [-Wunused-const-variable=]
124 | static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5, 0};
| ^~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:123:22: warning: 'DP_SINK_DEVICE_STR_ID_1' defined but not used [-Wunused-const-variable=]
123 | static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3, 0};
| ^~~~~~~~~~~~~~~~~~~~~~~


vim +/is_timing_changed +1617 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_resource.c

1616
> 1617 bool is_timing_changed(struct dc_stream_state *cur_stream,
1618 struct dc_stream_state *new_stream)
1619 {
1620 if (cur_stream == NULL)
1621 return true;
1622
1623 /* If output color space is changed, need to reprogram info frames */
1624 if (cur_stream->output_color_space != new_stream->output_color_space)
1625 return true;
1626
1627 return memcmp(
1628 &cur_stream->timing,
1629 &new_stream->timing,
1630 sizeof(struct dc_crtc_timing)) != 0;
1631 }
1632

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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