Message-ID: <647c8ea1-4f3d-1538-a78f-b71122e9c4f9@tuxedocomputers.com>
Date:   Wed, 22 Feb 2023 16:39:06 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.7.1
Subject: Re: [PATCH 0/2] Add quirk to disable PSR 2 on Tongfang PHxTxX1 and
 PHxTQx1
To:     jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com,
        rodrigo.vivi@intel.com, tvrtko.ursulin@linux.intel.com,
        airlied@gmail.com, daniel@ffwll.ch, jose.souza@intel.com,
        jouni.hogander@intel.com, mika.kahola@intel.com,
        ville.syrjala@linux.intel.com, lucas.demarchi@intel.com,
        Diego.SantaCruz@spinetix.com, intel-gfx@lists.freedesktop.org,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
References: <20230222141755.1060162-1-wse@tuxedocomputers.com>
Content-Language: en-US
From:   Werner Sembach <wse@tuxedocomputers.com>
In-Reply-To: <20230222141755.1060162-1-wse@tuxedocomputers.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk


Am 22.02.23 um 15:17 schrieb Werner Sembach:
> On these Barebones PSR 2 is recognized as supported but is very buggy:
> - Upper third of screen does sometimes not updated, resulting in
> disappearing cursors or ghosts of already closed Windows saying behind.
> - Approximately 40 px from the bottom edge a 3 pixel wide strip of randomly
> colored pixels is flickering.
>
> PSR 1 is working fine however.
>
> This patchset introduces a new quirk to disable PSR 2 specifically on known
> buggy devices and applies it to the Tongfang PHxTxX1 and PHxTQx1 barebones.
>
> Signed-off-by: Werner Sembach <wse@tuxedocomputers.com>
> Cc: <stable@vger.kernel.org>
>
>
Parralel to this there is a patch fixing the root cause of this issue: 
https://gitlab.freedesktop.org/drm/intel/-/issues/7347#note_1785094

So this quirk might only be relevant for stable kernels, depending on when that 
other patch gets merged.