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Subjectdrivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:1933:5: warning: no previous prototype for 'get_frame_rate_at_max_stretch_100hz'
Hi Rodrigo,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 53e99dcff61e1523ec1c3628b2d564ba15d32eb7
commit: 00fa7f031dd4b885175da390e24cb02f6a45977e drm/amd/display: Add basic infrastructure for enabling FAMS
date: 9 weeks ago
config: i386-buildonly-randconfig-r004-20220905 (https://download.01.org/0day-ci/archive/20220906/202209061427.nCA7sXSr-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=00fa7f031dd4b885175da390e24cb02f6a45977e
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 00fa7f031dd4b885175da390e24cb02f6a45977e
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/

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

All warnings (new ones prefixed by >>):

| ^~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_hwseq.h:386:9: note: in expansion of macro 'SR'
386 | SR(MPC_CRC_RESULT_GB), \
| ^~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:624:17: note: in expansion of macro 'HWSEQ_DCN30_REG_LIST'
624 | HWSEQ_DCN30_REG_LIST()
| ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/sienna_cichlid_ip_offset.h:373:52: note: (near initialization for 'hwseq_reg.MPC_CRC_RESULT_GB')
373 | #define DCN_BASE__INST0_SEG3 0x00009000
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:113:25: note: in expansion of macro 'DCN_BASE__INST0_SEG3'
113 | #define BASE_INNER(seg) DCN_BASE__INST0_SEG ## seg
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:115:19: note: in expansion of macro 'BASE_INNER'
115 | #define BASE(seg) BASE_INNER(seg)
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:118:29: note: in expansion of macro 'BASE'
118 | .reg_name = BASE(mm ## reg_name ## _BASE_IDX) + \
| ^~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_hwseq.h:386:9: note: in expansion of macro 'SR'
386 | SR(MPC_CRC_RESULT_GB), \
| ^~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:624:17: note: in expansion of macro 'HWSEQ_DCN30_REG_LIST'
624 | HWSEQ_DCN30_REG_LIST()
| ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/sienna_cichlid_ip_offset.h:373:52: warning: initialized field overwritten [-Woverride-init]
373 | #define DCN_BASE__INST0_SEG3 0x00009000
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:113:25: note: in expansion of macro 'DCN_BASE__INST0_SEG3'
113 | #define BASE_INNER(seg) DCN_BASE__INST0_SEG ## seg
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:115:19: note: in expansion of macro 'BASE_INNER'
115 | #define BASE(seg) BASE_INNER(seg)
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:118:29: note: in expansion of macro 'BASE'
118 | .reg_name = BASE(mm ## reg_name ## _BASE_IDX) + \
| ^~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_hwseq.h:387:9: note: in expansion of macro 'SR'
387 | SR(MPC_CRC_RESULT_C), \
| ^~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:624:17: note: in expansion of macro 'HWSEQ_DCN30_REG_LIST'
624 | HWSEQ_DCN30_REG_LIST()
| ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/sienna_cichlid_ip_offset.h:373:52: note: (near initialization for 'hwseq_reg.MPC_CRC_RESULT_C')
373 | #define DCN_BASE__INST0_SEG3 0x00009000
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:113:25: note: in expansion of macro 'DCN_BASE__INST0_SEG3'
113 | #define BASE_INNER(seg) DCN_BASE__INST0_SEG ## seg
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:115:19: note: in expansion of macro 'BASE_INNER'
115 | #define BASE(seg) BASE_INNER(seg)
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:118:29: note: in expansion of macro 'BASE'
118 | .reg_name = BASE(mm ## reg_name ## _BASE_IDX) + \
| ^~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_hwseq.h:387:9: note: in expansion of macro 'SR'
387 | SR(MPC_CRC_RESULT_C), \
| ^~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:624:17: note: in expansion of macro 'HWSEQ_DCN30_REG_LIST'
624 | HWSEQ_DCN30_REG_LIST()
| ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/sienna_cichlid_ip_offset.h:373:52: warning: initialized field overwritten [-Woverride-init]
373 | #define DCN_BASE__INST0_SEG3 0x00009000
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:113:25: note: in expansion of macro 'DCN_BASE__INST0_SEG3'
113 | #define BASE_INNER(seg) DCN_BASE__INST0_SEG ## seg
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:115:19: note: in expansion of macro 'BASE_INNER'
115 | #define BASE(seg) BASE_INNER(seg)
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:118:29: note: in expansion of macro 'BASE'
118 | .reg_name = BASE(mm ## reg_name ## _BASE_IDX) + \
| ^~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_hwseq.h:388:9: note: in expansion of macro 'SR'
388 | SR(MPC_CRC_RESULT_AR), \
| ^~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:624:17: note: in expansion of macro 'HWSEQ_DCN30_REG_LIST'
624 | HWSEQ_DCN30_REG_LIST()
| ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../include/sienna_cichlid_ip_offset.h:373:52: note: (near initialization for 'hwseq_reg.MPC_CRC_RESULT_AR')
373 | #define DCN_BASE__INST0_SEG3 0x00009000
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:113:25: note: in expansion of macro 'DCN_BASE__INST0_SEG3'
113 | #define BASE_INNER(seg) DCN_BASE__INST0_SEG ## seg
| ^~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:115:19: note: in expansion of macro 'BASE_INNER'
115 | #define BASE(seg) BASE_INNER(seg)
| ^~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:118:29: note: in expansion of macro 'BASE'
118 | .reg_name = BASE(mm ## reg_name ## _BASE_IDX) + \
| ^~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dce_hwseq.h:388:9: note: in expansion of macro 'SR'
388 | SR(MPC_CRC_RESULT_AR), \
| ^~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:624:17: note: in expansion of macro 'HWSEQ_DCN30_REG_LIST'
624 | HWSEQ_DCN30_REG_LIST()
| ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:1902:5: warning: no previous prototype for 'get_refresh_rate' [-Wmissing-prototypes]
1902 | int get_refresh_rate(struct dc_state *context)
| ^~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:1933:5: warning: no previous prototype for 'get_frame_rate_at_max_stretch_100hz' [-Wmissing-prototypes]
1933 | int get_frame_rate_at_max_stretch_100hz(struct dc_state *context)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:1963:6: warning: no previous prototype for 'is_refresh_rate_support_mclk_switch_using_fw_based_vblank_stretch' [-Wmissing-prototypes]
1963 | bool is_refresh_rate_support_mclk_switch_using_fw_based_vblank_stretch(struct dc_state *context)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:1980:6: warning: no previous prototype for 'dcn30_can_support_mclk_switch_using_fw_based_vblank_stretch' [-Wmissing-prototypes]
1980 | bool dcn30_can_support_mclk_switch_using_fw_based_vblank_stretch(struct dc *dc, struct dc_state *context)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c:2040:5: warning: no previous prototype for 'dcn30_find_dummy_latency_index_for_fw_based_mclk_switch' [-Wmissing-prototypes]
2040 | int dcn30_find_dummy_latency_index_for_fw_based_mclk_switch(struct dc *dc, struct dc_state *context,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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/dcn30/dcn30_resource.c:32:
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, 0};
| ^~~~~~~~~~~~~~~~~~~~~~~
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, 0};
| ^~~~~~~~~~~~~~~~~~~~~~~


vim +/get_frame_rate_at_max_stretch_100hz +1933 drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_resource.c

1932
> 1933 int get_frame_rate_at_max_stretch_100hz(struct dc_state *context)
1934 {
1935 struct dc_crtc_timing *timing = NULL;
1936 uint32_t sec_per_100_lines;
1937 uint32_t max_v_blank;
1938 uint32_t curr_v_blank;
1939 uint32_t v_stretch_max;
1940 uint32_t stretched_frame_pix_cnt;
1941 uint32_t scaled_stretched_frame_pix_cnt;
1942 uint32_t scaled_refresh_rate;
1943
1944 if (context == NULL || context->streams[0] == NULL)
1945 return 0;
1946
1947 /* check if refresh rate at least 120hz */
1948 timing = &context->streams[0]->timing;
1949 if (timing == NULL)
1950 return 0;
1951
1952 sec_per_100_lines = timing->pix_clk_100hz / timing->h_total + 1;
1953 max_v_blank = sec_per_100_lines / V_SCALE + 1;
1954 curr_v_blank = timing->v_total - timing->v_addressable;
1955 v_stretch_max = (max_v_blank > curr_v_blank) ? (max_v_blank - curr_v_blank) : (0);
1956 stretched_frame_pix_cnt = (v_stretch_max + timing->v_total) * timing->h_total;
1957 scaled_stretched_frame_pix_cnt = stretched_frame_pix_cnt / 10000;
1958 scaled_refresh_rate = (timing->pix_clk_100hz) / scaled_stretched_frame_pix_cnt + 1;
1959
1960 return scaled_refresh_rate;
1961 }
1962
> 1963 bool is_refresh_rate_support_mclk_switch_using_fw_based_vblank_stretch(struct dc_state *context)
1964 {
1965 int refresh_rate_max_stretch_100hz;
1966 int min_refresh_100hz;
1967
1968 if (context == NULL || context->streams[0] == NULL)
1969 return false;
1970
1971 refresh_rate_max_stretch_100hz = get_frame_rate_at_max_stretch_100hz(context);
1972 min_refresh_100hz = context->streams[0]->timing.min_refresh_in_uhz / 10000;
1973
1974 if (refresh_rate_max_stretch_100hz < min_refresh_100hz)
1975 return false;
1976
1977 return true;
1978 }
1979

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

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