linux-kernel - Re: [PATCH v2 0/5] Fixes and improvements for Xen pvdrm

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Date:   Thu, 13 Aug 2020 09:05:26 +0200
From:   Jürgen Groß <jgross@...e.com>
To:     Oleksandr Andrushchenko <Oleksandr_Andrushchenko@...m.com>,
        "boris.ostrovsky@...cle.com" <boris.ostrovsky@...cle.com>
Cc:     Oleksandr Andrushchenko <andr2000@...il.com>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "sstabellini@...nel.org" <sstabellini@...nel.org>,
        "dan.carpenter@...cle.com" <dan.carpenter@...cle.com>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>
Subject: Re: [PATCH v2 0/5] Fixes and improvements for Xen pvdrm

On 13.08.20 08:32, Oleksandr Andrushchenko wrote:
> Juergen, Boris,
> 
> can we please merge these via Xen Linux tree as I have collected enough Ack/R-b?
> 
> The series has DRM patches, but those anyway are Xen related, so I think
> 
> this should be fine from DRI point of view.

Yes, fine with me.


Juergen

> 
> Thank you,
> 
> Oleksandr
> 
> On 8/13/20 9:21 AM, Oleksandr Andrushchenko wrote:
>> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
>>
>> Hello,
>>
>> This series contains an assorted set of fixes and improvements for
>> the Xen para-virtualized display driver and grant device driver which
>> I have collected over the last couple of months:
>>
>> 1. Minor fixes to grant device driver and drm/xen-front.
>>
>> 2. New format (YUYV) added to the list of the PV DRM supported formats
>> which allows the driver to be used in zero-copying use-cases when
>> a camera device is the source of the dma-bufs.
>>
>> 3. Synchronization with the latest para-virtualized protocol definition
>> in Xen [1].
>>
>> 4. SGT offset is now propagated to the backend: while importing a dmabuf
>> it is possible that the data of the buffer is put with offset which is
>> indicated by the SGT offset. This is needed for some GPUs which have
>> non-zero offset.
>>
>> Thank you,
>> Oleksandr Andrushchenko
>>
>> [1] https://urldefense.com/v3/__https://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=c27a184225eab54d20435c8cab5ad0ef384dc2c0__;!!GF_29dbcQIUBPA!iAHOdk4M167VNM1AypMGVmyKJu-iqC9e5cXyu6N595Np3iyIZDnZl0MIBX3IROJSD1GSMX_GfQ$ [xenbits[.]xen[.]org]
>>
>> Changes since v1:
>> =================
>>
>> 1. Removed patch which adds EDID to PV DRM as it needs more time for review:
>> "5. Version 2 of the Xen displif protocol adds XENDISPL_OP_GET_EDID
>> request which allows frontends to request EDID structure per
>> connector. This request is optional and if not supported by the
>> backend then visible area is still defined by the relevant
>> XenStore's "resolution" property.
>> If backend provides EDID with XENDISPL_OP_GET_EDID request then
>> its values must take precedence over the resolutions defined in
>> XenStore."
>> I will send this as a dedicated patch.
>>
>> 2. Added missing CC stable for the patches with fixes
>>
>> Oleksandr Andrushchenko (5):
>>     xen/gntdev: Fix dmabuf import with non-zero sgt offset
>>     drm/xen-front: Fix misused IS_ERR_OR_NULL checks
>>     drm/xen-front: Add YUYV to supported formats
>>     xen: Sync up with the canonical protocol definition in Xen
>>     drm/xen-front: Pass dumb buffer data offset to the backend
>>
>>    drivers/gpu/drm/xen/xen_drm_front.c      | 10 +--
>>    drivers/gpu/drm/xen/xen_drm_front.h      |  2 +-
>>    drivers/gpu/drm/xen/xen_drm_front_conn.c |  1 +
>>    drivers/gpu/drm/xen/xen_drm_front_gem.c  | 11 +--
>>    drivers/gpu/drm/xen/xen_drm_front_kms.c  |  2 +-
>>    drivers/xen/gntdev-dmabuf.c              |  8 +++
>>    include/xen/interface/io/displif.h       | 91 +++++++++++++++++++++++-
>>    7 files changed, 111 insertions(+), 14 deletions(-)
>>
>