linux-kernel - [PATCH] drm/amd/powerplay/smu7_hwmgr: replace blocking delay with non-blocking

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Message-ID: <20190530000819.GA25416@obi-wan>
Date:   Thu, 30 May 2019 02:08:21 +0200
From:   Yrjan Skrimstad <yrjan@...imstad.net>
To:     dri-devel@...ts.freedesktop.org
Cc:     Rex Zhu <rex.zhu@....com>, Evan Quan <evan.quan@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Yrjan Skrimstad <yrjan@...imstad.net>
Subject: [PATCH] drm/amd/powerplay/smu7_hwmgr: replace blocking delay with
 non-blocking

This driver currently contains a repeated 500ms blocking delay call
which causes frequent major buffer underruns in PulseAudio. This patch
fixes this issue by replacing the blocking delay with a non-blocking
sleep call.

Signed-off-by: Yrjan Skrimstad <yrjan@...imstad.net>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
index 048757e8f494..340afdbddc72 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -3494,7 +3494,7 @@ static int smu7_get_gpu_power(struct pp_hwmgr *hwmgr, u32 *query)
 							ixSMU_PM_STATUS_95, 0);
 
 	for (i = 0; i < 10; i++) {
-		mdelay(500);
+		msleep(500);
 		smum_send_msg_to_smc(hwmgr, PPSMC_MSG_PmStatusLogSample);
 		tmp = cgs_read_ind_register(hwmgr->device,
 						CGS_IND_REG__SMC,
-- 
2.20.1