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Message-Id: <20221118074810.380368-1-lizhenneng@kylinos.cn>
Date: Fri, 18 Nov 2022 15:48:10 +0800
From: Zhenneng Li <lizhenneng@...inos.cn>
To: Alex Deucher <alexander.deucher@....com>
Cc: Christian König <christian.koenig@....com>,
Xinhui.Pan@....com, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Zhenneng Li <lizhenneng@...inos.cn>
Subject: [PATCH] drm/amdgpu: add mb for si
During reboot test on arm64 platform, it may failure on boot,
so add this mb in smc.
The error message are as follows:
[ 6.996395][ 7] [ T295] [drm:amdgpu_device_ip_late_init [amdgpu]] *ERROR*
late_init of IP block <si_dpm> failed -22
[ 7.006919][ 7] [ T295] amdgpu 0000:04:00.0: amdgpu_device_ip_late_init failed
[ 7.014224][ 7] [ T295] amdgpu 0000:04:00.0: Fatal error during GPU init
Signed-off-by: Zhenneng Li <lizhenneng@...inos.cn>
---
drivers/gpu/drm/amd/pm/legacy-dpm/si_smc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/legacy-dpm/si_smc.c b/drivers/gpu/drm/amd/pm/legacy-dpm/si_smc.c
index 8f994ffa9cd1..c7656f22278d 100644
--- a/drivers/gpu/drm/amd/pm/legacy-dpm/si_smc.c
+++ b/drivers/gpu/drm/amd/pm/legacy-dpm/si_smc.c
@@ -155,6 +155,8 @@ bool amdgpu_si_is_smc_running(struct amdgpu_device *adev)
u32 rst = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
u32 clk = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
+ mb();
+
if (!(rst & RST_REG) && !(clk & CK_DISABLE))
return true;
--
2.25.1
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