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| author |   Arnd Bergmann <arnd@arndb.de> | 2017-11-02 12:26:43 +0100 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2017-11-02 13:44:41 -0400 |
| commit | 1f3493faa8d73b0332d46ea79448b10b66fb1af0 (patch) | |
| tree | fbc71d3e54f0c823a6032727a303a47ffe1fe8b6 /drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c | |
| parent | drm/amdgpu/display: remove unused REG_OFFSET macro (diff) | |
| download | linux-dev-1f3493faa8d73b0332d46ea79448b10b66fb1af0.tar.xz linux-dev-1f3493faa8d73b0332d46ea79448b10b66fb1af0.zip | |
drm/amdgpu/display: fix integer arithmetic problem
gcc warns about an ambiguous integer calculation:
drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dce_calcs.c: In function 'calculate_bandwidth':
drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dce_calcs.c:534:5: error: this decimal constant is unsigned only in ISO C90 [-Werror]
data->lb_line_pitch = bw_ceil2(bw_mul(bw_div(bw_frc_to_fixed(2401171875, 100000000), bw_int_to_fixed(3)), bw_ceil2(data->source_width_in_lb, bw_int_to_fixed(8))), bw_int_to_fixed(48));
^~~~
Marking the constant as explicitly unsigned makes it work fine everywhere
without warnings.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c index 15cbfc400633..4f8a95368ffc 100644 --- a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c +++ b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c @@ -531,7 +531,7 @@ static void calculate_bandwidth( } switch (data->lb_bpc[i]) { case 8: - data->lb_line_pitch = bw_ceil2(bw_mul(bw_div(bw_frc_to_fixed(2401171875, 100000000), bw_int_to_fixed(3)), bw_ceil2(data->source_width_in_lb, bw_int_to_fixed(8))), bw_int_to_fixed(48)); + data->lb_line_pitch = bw_ceil2(bw_mul(bw_div(bw_frc_to_fixed(2401171875ul, 100000000), bw_int_to_fixed(3)), bw_ceil2(data->source_width_in_lb, bw_int_to_fixed(8))), bw_int_to_fixed(48)); break; case 10: data->lb_line_pitch = bw_ceil2(bw_mul(bw_div(bw_frc_to_fixed(300234375, 10000000), bw_int_to_fixed(3)), bw_ceil2(data->source_width_in_lb, bw_int_to_fixed(8))), bw_int_to_fixed(48)); |