diff options
| author | Aric Cyr <aric.cyr@amd.com> | 2023-02-04 01:46:05 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-02-28 22:29:35 +0300 |
| commit | c69fc3d0de6ca79d946a2715f8745a1eae69c3d8 (patch) | |
| tree | ab0b6ea431a835a5124e07c35bb46c7b2568ad28 /drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c | |
| parent | b4ceeffd13870b641a284ffb0f6fb4ffe19b0b14 (diff) | |
| download | linux-c69fc3d0de6ca79d946a2715f8745a1eae69c3d8.tar.xz | |
drm/amd/display: Reduce CPU busy-waiting for long delays
[WHY]
udelay should not be used for long waits since it keeps CPU active,
wasting power.
[HOW]
Use fsleep where acceptable to allow CPU cores to be parked by the scheduler.
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c index f69e681b3b5b..fcb82bb855ed 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c @@ -424,7 +424,7 @@ int dc_link_dp_dpia_handle_usb4_bandwidth_allocation_for_link(struct dc_link *li timeout--; else break; - udelay(10 * 1000); + fsleep(10 * 1000); } while (!get_cm_response_ready_flag(link)); if (!timeout) |