linux-kernel - Re: [PATCH v2] drm/virtio: Add suppport for non-native buffer formats

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Message-ID: <1dca4a2e-5bde-4825-8e8a-4b4ac8dd958e@xenosoft.de>
Date:   Fri, 8 Dec 2023 11:52:34 +0100
From:   Christian Zigotzky <chzigotzky@...osoft.de>
To:     Gerd Hoffmann <kraxel@...hat.com>,
        David Airlie <airlied@...hat.com>,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        Chia-I Wu <olvaffe@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Laurent Vivier <lvivier@...hat.com>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Hamza Mahfooz <hamza.mahfooz@....com>,
        linux-m68k@...ts.linux-m68k.org, dri-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     "R.T.Dickinson" <rtd2@...a.co.nz>,
        mad skateman <madskateman@...il.com>,
        Christian Zigotzky <info@...osoft.de>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Subject: Re: [PATCH v2] drm/virtio: Add suppport for non-native buffer formats

On 25 November 2023 at 01:35 pm, Christian Zigotzky wrote:
> On 25 November 2023 at 01:22 pm, Christian Zigotzky wrote:
>> On 25 November 2023 at 12:09 pm, John Paul Adrian Glaubitz wrote:
>>> On Sat, 2023-11-25 at 11:06 +0100, Christian Zigotzky wrote:
>>>> Could you please revert the v2 patch because of the issue with the
>>>> virtio-mouse-pci cursor? I will try to use the v1 patch for the RC3 of
>>>> kernel 6.7.
>>> I don't understand why the v2 patch should yield any different 
>>> results as
>>> the only change compared to v1 is the fixed patch subject. There are no
>>> functional differences, I just diffed the patches against each other:
>>>
>>> --- geert-patch-v1.patch        2023-11-25 12:09:19.122936658 +0100
>>> +++ geert-patch-v2.patch        2023-11-25 12:09:36.313039085 +0100
>>> @@ -34,6 +34,9 @@
>>>   Suggested-by: Gerd Hoffmann <kraxel@...hat.com>
>>>   Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
>>>   ---
>>> +v2:
>>> +  - Fix truncated one-line summary.
>>> +---
>>>    drivers/gpu/drm/virtio/virtgpu_display.c | 11 +++++++++--
>>>    drivers/gpu/drm/virtio/virtgpu_plane.c   |  6 ++++--
>>>    2 files changed, 13 insertions(+), 4 deletions(-)
>>>
>>> Adrian
>>>
>> Hi Adrian,
>>
>> Thank you for the hint. I think you are right. I use the following 
>> patch.
>>
>> --- a/drivers/gpu/drm/drm_client.c    2023-11-13 01:19:07.000000000 
>> +0100
>> +++ b/drivers/gpu/drm/drm_client.c    2023-11-14 09:45:44.964199272 
>> +0100
>> @@ -400,6 +400,16 @@ static int drm_client_buffer_addfb(struc
>>
>>      fb_req.width = width;
>>      fb_req.height = height;
>> +           if 
>> (client->dev->mode_config.quirk_addfb_prefer_host_byte_order) {
>> +               if (format == DRM_FORMAT_XRGB8888)
>> +                       format = DRM_FORMAT_HOST_XRGB8888;
>> +               if (format == DRM_FORMAT_ARGB8888)
>> +                       format = DRM_FORMAT_HOST_ARGB8888;
>> +               if (format == DRM_FORMAT_RGB565)
>> +                       format = DRM_FORMAT_HOST_RGB565;
>> +               if (format == DRM_FORMAT_XRGB1555)
>> +                       format = DRM_FORMAT_HOST_XRGB1555;
>> +        }
>>      fb_req.pixel_format = format;
>>      fb_req.handles[0] = handle;
>>      fb_req.pitches[0] = buffer->pitch;
>>
>> This patch solved the issue.
>>
>> Christian
> This was the first solution and it works without any problems.
>
> Christian
Hi All,

The issue with the virtio-mouse-pci cursor still exists. I still use the 
patch for "a/drivers/gpu/drm/drm_client.c".

Is there any news regarding a solution?

Thanks,
Christian