linux-kernel - [PATCH AUTOSEL 5.16 40/52] drm/amdgpu/display: use msleep rather than udelay for long delays

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Message-Id: <20220203202947.2304-40-sashal@kernel.org>
Date:   Thu,  3 Feb 2022 15:29:34 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Alex Deucher <alexander.deucher@....com>,
        Harry Wentland <harry.wentland@....com>,
        Sasha Levin <sashal@...nel.org>, sunpeng.li@....com,
        Rodrigo.Siqueira@....com, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...ux.ie, daniel@...ll.ch,
        Jun.Lei@....com, wenjing.liu@....com, George.Shen@....com,
        Jimmy.Kizito@....com, Wesley.Chalmers@....com, Jerry.Zuo@....com,
        stylon.wang@....com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.16 40/52] drm/amdgpu/display: use msleep rather than udelay for long delays

From: Alex Deucher <alexander.deucher@....com>

[ Upstream commit 98fdcacb45f7cd2092151d6af2e60152811eb79c ]

Some architectures (e.g., ARM) throw an compilation error if the
udelay is too long.  In general udelays of longer than 2000us are
not recommended on any architecture.  Switch to msleep in these
cases.

Reviewed-by: Harry Wentland <harry.wentland@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 01ac1a64c78b9..d1b47c0d7791a 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -6038,7 +6038,7 @@ bool dpcd_write_128b_132b_sst_payload_allocation_table(
 			}
 		}
 		retries++;
-		udelay(5000);
+		msleep(5);
 	}
 
 	if (!result && retries == max_retries) {
@@ -6090,7 +6090,7 @@ bool dpcd_poll_for_allocation_change_trigger(struct dc_link *link)
 			break;
 		}
 
-		udelay(5000);
+		msleep(5);
 	}
 
 	if (result == ACT_FAILED) {
-- 
2.34.1