linux-kernel - [PATCH 5.16 055/203] drm/amdgpu/display: adjust msleep limit in dp_wait_for_training_aux_rd

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Date:   Mon, 14 Feb 2022 10:24:59 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Harry Wentland <harry.wentland@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 055/203] drm/amdgpu/display: adjust msleep limit in dp_wait_for_training_aux_rd_interval

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

[ Upstream commit dc919d670c6fd1ac81ebf31625cd19579f7b3d4c ]

Some architectures (e.g., ARM) have relatively low udelay limits.
On most architectures, anything longer than 2000us is not recommended.
Change the check to align with other similar checks in DC.

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 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 ccd6cdbe46f43..b97be2e9088ce 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
@@ -201,7 +201,7 @@ void dp_wait_for_training_aux_rd_interval(
 	uint32_t wait_in_micro_secs)
 {
 #if defined(CONFIG_DRM_AMD_DC_DCN)
-	if (wait_in_micro_secs > 16000)
+	if (wait_in_micro_secs > 1000)
 		msleep(wait_in_micro_secs/1000);
 	else
 		udelay(wait_in_micro_secs);
-- 
2.34.1