diff options
| author | Imre Deak <imre.deak@intel.com> | 2023-11-16 16:18:39 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2023-11-21 17:32:44 +0300 |
| commit | 5ee4badb4b195bd871ba6d5a2d43aac03587230a (patch) | |
| tree | d9698a5ad558e8e7129b7a776c80d421f046461b /drivers/gpu/drm | |
| parent | 9069b77545ca5afc222effa994c65a64ac5e6462 (diff) | |
| download | linux-5ee4badb4b195bd871ba6d5a2d43aac03587230a.tar.xz | |
drm/i915/dp: Report a rounded-down value as the maximum data rate
Callers of intel_dp_max_data_rate() use the return value as an upper
bound for the BW a given mode requires. As such the rounding shouldn't
result in a bigger value than the actual upper bound. Use round-down
instead of -closest accordingly.
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231116131841.1588781-10-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index e7502a824047..7fd883b954a6 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -413,7 +413,7 @@ intel_dp_max_data_rate(int max_link_rate, int max_lanes) */ int max_link_rate_kbps = max_link_rate * 10; - max_link_rate_kbps = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(max_link_rate_kbps, 9671), 10000); + max_link_rate_kbps = DIV_ROUND_DOWN_ULL(mul_u32_u32(max_link_rate_kbps, 9671), 10000); max_link_rate = max_link_rate_kbps / 8; } @@ -423,7 +423,7 @@ intel_dp_max_data_rate(int max_link_rate, int max_lanes) * out to be a nop by coincidence, and can be skipped: * * int max_link_rate_kbps = max_link_rate * 10; - * max_link_rate_kbps = DIV_ROUND_CLOSEST_ULL(max_link_rate_kbps * 8, 10); + * max_link_rate_kbps = DIV_ROUND_DOWN_ULL(max_link_rate_kbps * 8, 10); * max_link_rate = max_link_rate_kbps / 8; */ |