linux-kernel - [PATCH 1/1] drm/amdgpu/runpm: Disable runpm on Fiji due to audio register timeout

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Date:   Mon, 27 Apr 2020 00:02:47 +0800
From:   Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>
To:     linux-kernel@...r.kernel.org
Cc:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Zhou <David1.Zhou@....com>,
        Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>
Subject: [PATCH 1/1] drm/amdgpu/runpm: Disable runpm on Fiji due to audio
 register timeout

Since commit 4fdda2e66de0 ("drm/amdgpu/runpm: enable runpm on baco
capable VI+ asics"), runpm has been enabled on AMD Fiji GPUs. This
allows the GPU to enter BACO state, as evidenced by the fan on the
graphics card turning off. When it is in this state, accesses to the
registers of the PCIe audio function on the GPU time out, leading to
dmesg errors such as the following:

snd_hda_intel 0000:08:00.1: spurious response 0x0:0x0, last cmd=0x170500
snd_hda_intel 0000:08:00.1: azx_get_response timeout, switching to polling mode: last cmd=0x001f0500
snd_hda_intel 0000:08:00.1: No response from codec, disabling MSI: last cmd=0x001f0500
snd_hda_intel 0000:08:00.1: No response from codec, resetting bus: last cmd=0x001f0500
snd_hda_codec_hdmi hdaudioC1D0: Unable to sync register 0x2f0d00. -11

Pending a fix for the above problem, disable runpm on Fiji.

Signed-off-by: Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index fd1dc3236..cbb55d2f1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -172,6 +172,7 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
 	else if (amdgpu_device_supports_baco(dev) &&
 		 (amdgpu_runtime_pm != 0) &&
 		 (adev->asic_type >= CHIP_TOPAZ) &&
+		 (adev->asic_type != CHIP_FIJI) &&
 		 (adev->asic_type != CHIP_VEGA10) &&
 		 (adev->asic_type != CHIP_VEGA20) &&
 		 (adev->asic_type != CHIP_ARCTURUS)) /* enable runpm on VI+ */
-- 
2.26.2