Date:   Thu, 22 Sep 2022 13:26:23 +0200
From:   Thorsten Leemhuis <regressions@...mhuis.info>
To:     August Wikerfors <git@...ustwikerfors.se>,
        Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>
Cc:     Alex Deucher <alexander.deucher@....com>,
        amd-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        regressions@...ts.linux.dev
Subject: Re: [REGRESSION] Graphical issues on Lenovo Yoga 7 14ARB7 laptop
 since v6.0-rc1 (bisected)

Hi, this is your Linux kernel regression tracker. Top-posting for once,
to make this easily accessible to everyone.

@amdgpu developers, what up here? August afaics didn't even get a single
reply for his report that even identifies the change that's causing the
problem. We're already late in the development cycle, so it would be
good if someone could take a closer look into this before it's too late
for 6.0.

Ciao, Thorsten

#regzbot poke

On 17.09.22 18:57, August Wikerfors wrote:
> Hi,
> with every kernel version since v6.0-rc1, including the latest git
> master, there are constant graphical issues on this laptop, such as
> heavy stuttering (this is especially noticeable while typing on the
> keyboard), parts of the screen showing random noise, and the entire
> desktop environment freezing.
> 
> I bisected the issue which showed that this is the first bad commit:
> 
>> commit 7cc191ee7621b7145c6cc9c18a4e1929bb5f136e
>> Author: Leo Li <sunpeng.li@....com>
>> Date:   Wed Mar 30 12:45:09 2022 -0400
>>
>>     drm/amd/display: Implement MPO PSR SU
>>         [WHY]
>>         For additional power savings, PSR SU (also referred to as
>> PSR2) can be
>>     enabled on eDP panels with PSR SU support.
>>         PSR2 saves more power compared to PSR1 by allowing more
>> opportunities
>>     for the display hardware to be shut down. In comparison to PSR1, Shut
>>     down can now occur in-between frames, as well as in display regions
>>     where there is no visible update. In otherwords, it allows for some
>>     display hw components to be enabled only for a **selectively
>> updated**
>>     region of the visible display. Hence PSR SU.
>>         [HOW]
>>         To define the SU region, support from the OS is required. OS
>> needs to
>>     inform driver of damaged regions that need to be flushed to the eDP
>>     panel. Today, such support is lacking in most compositors.
>>         Therefore, an in-between solution is to implement PSR SU for
>> MPO and
>>     cursor scenarios. The plane bounds can be used to define the damaged
>>     region to be flushed to panel. This is achieved by:
>>         * Leveraging dm_crtc_state->mpo_requested flag to identify
>> when MPO is
>>       enabled.
>>     * If MPO is enabled, only add updated plane bounds to dirty region.
>>       Determine plane update by either:
>>         * Existence of drm damaged clips attached to the plane (added
>> by a
>>           damage-aware compositor)
>>         * Change in fb id (flip)
>>         * Change in plane bounds (position and dimensions)
>>     * If cursor is enabled, the old_pos and new_pos of cursor plus cursor
>>       size is used as damaged regions(*).
>>         (*) Cursor updates follow a different code path through DC.
>> PSR SU for
>>     cursor is already implemented in DC, and the only thing required to
>>     enable is to set DC_PSR_VERSION_SU_1 on the eDP link. See
>>     dcn10_dmub_update_cursor_data().
>>         Signed-off-by: Leo Li <sunpeng.li@....com>
>>     Acked-by: Leo Li <sunpeng.li@....com>
>>     Reviewed-by: Harry Wentland <harry.wentland@....com>
>>     Signed-off-by: Alex Deucher <alexander.deucher@....com>
> 
> #regzbot introduced: 7cc191ee7621b7145c6cc9c18a4e1929bb5f136e
> 
> Note that while bisecting I also needed to apply commit
> 9946e39fe8d0a5da9eb947d8e40a7ef204ba016e as the keyboard doesn't work
> without it.
> 
> Laptop model: Lenovo Yoga 7 14ARB7
> CPU: AMD Ryzen 5 6600U
> Kernel config:
> https://raw.githubusercontent.com/archlinux/svntogit-packages/aa564cf7088b1d834ef4cda9cb48ff0283fde5c5/trunk/config
> Distribution: Arch Linux
> Desktop environment: KDE Plasma 5.25.5
> 
> lspci:
>> $ lspci -nn
>> 00:00.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b5] (rev 01)
>> 00:00.2 IOMMU [0806]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b6]
>> 00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b7] (rev 01)
>> 00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b7] (rev 01)
>> 00:02.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14ba]
>> 00:02.4 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14ba]
>> 00:02.5 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14ba]
>> 00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b7] (rev 01)
>> 00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14cd]
>> 00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b7] (rev 01)
>> 00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b7] (rev 01)
>> 00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b9] (rev 10)
>> 00:08.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:14b9] (rev 10)
>> 00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus
>> Controller [1022:790b] (rev 71)
>> 00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC
>> Bridge [1022:790e] (rev 51)
>> 00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:1679]
>> 00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:167a]
>> 00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:167b]
>> 00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:167c]
>> 00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:167d]
>> 00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:167e]
>> 00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:167f]
>> 00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Device
>> [1022:1680]
>> 01:00.0 Network controller [0280]: MEDIATEK Corp. MT7922 802.11ax PCI
>> Express Wireless Network Adapter [14c3:0616]
>> 02:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co
>> Ltd Device [144d:a80b] (rev 02)
>> 03:00.0 SD Host controller [0805]: O2 Micro, Inc. SD/MMC Card Reader
>> Controller [1217:8621] (rev 01)
>> 33:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
>> [AMD/ATI] Rembrandt [Radeon 680M] [1002:1681] (rev c2)
>> 33:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI]
>> Rembrandt Radeon High Definition Audio Controller [1002:1640]
>> 33:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc.
>> [AMD] VanGogh PSP/CCP [1022:1649]
>> 33:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD]
>> Device [1022:161d]
>> 33:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD]
>> Device [1022:161e]
>> 33:00.5 Multimedia controller [0480]: Advanced Micro Devices, Inc.
>> [AMD] ACP/ACP3X/ACP6x Audio Coprocessor [1022:15e2] (rev 60)
>> 33:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family
>> 17h/19h HD Audio Controller [1022:15e3]
>> 34:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD]
>> Device [1022:161f]
>> 34:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD]
>> Device [1022:15d6]
>> 34:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD]
>> Device [1022:15d7]
>> 34:00.5 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD]
>> Device [1022:162e]
> 
> 

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