tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 632483ea8004edfadd035de36e1ab2c7c4f53158 commit: bd051aa2fcfb803b94708429970f71596a4748e4 [12471/13491] drm/amd/display: Find max flickerless instant vtotal delta config: x86_64-randconfig-161-20240520 (https://download.01.org/0day-ci/archive/20240520/202405202243.SHvS2otq-lkp@xxxxxxxxx/config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202405202243.SHvS2otq-lkp@xxxxxxxxx/ New smatch warnings: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:1006 dc_stream_get_max_flickerless_instant_vtotal_delta() warn: always true condition '((stream->timing.v_total - safe_refresh_v_total) >= 0) => (0-u32max >= 0)' drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:1008 dc_stream_get_max_flickerless_instant_vtotal_delta() warn: always true condition '((safe_refresh_v_total - stream->timing.v_total) >= 0) => (0-u32max >= 0)' Old smatch warnings: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:398 dc_stream_program_cursor_position() error: we previously assumed 'stream' could be null (see line 397) vim +1006 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c 985 986 /* 987 * Determines the max flickerless instant vtotal delta for a stream. 988 * Determines vtotal increase/decrease based on the bool "increase" 989 */ 990 static unsigned int dc_stream_get_max_flickerless_instant_vtotal_delta(struct dc_stream_state *stream, bool is_gaming, bool increase) 991 { 992 if (stream->timing.v_total * stream->timing.h_total == 0) 993 return 0; 994 995 int current_refresh_hz = (int)div64_s64((long long)stream->timing.pix_clk_100hz*100, stream->timing.v_total*stream->timing.h_total); 996 997 int safe_refresh_hz = dc_stream_calculate_flickerless_refresh_rate(stream, 998 dc_stream_get_brightness_millinits_from_refresh(stream, current_refresh_hz), 999 current_refresh_hz, 1000 is_gaming, 1001 increase); 1002 1003 int safe_refresh_v_total = (int)div64_s64((long long)stream->timing.pix_clk_100hz*100, safe_refresh_hz*stream->timing.h_total); 1004 1005 if (increase) > 1006 return ((stream->timing.v_total - safe_refresh_v_total) >= 0) ? (stream->timing.v_total - safe_refresh_v_total) : 0; 1007 > 1008 return ((safe_refresh_v_total - stream->timing.v_total) >= 0) ? (safe_refresh_v_total - stream->timing.v_total) : 0; 1009 } 1010 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
