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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Simon Ser <contact@emersion.fr>
Cc: "Daniel Vetter" <daniel.vetter@intel.com>,
	"Marek Olšák" <maraeo@gmail.com>,
	"Juston Li" <juston.li@intel.com>,
	"Daniel Stone" <daniels@collabora.com>,
	"DRI Development" <dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH] drm/doc: Document that modifiers are always required for fb
Date: Wed, 2 Sep 2020 14:44:31 +0200
Message-ID: <CAKMK7uFztTjjvQvM-toeZv3hps+NMJFXV7s=Dzs5PwG3J+7wjw@mail.gmail.com> (raw)
In-Reply-To: <t3hHLqZ0yNm5FdxpyJovgjEVzs-OD7qD5nYrYXug8UhkBykhekB0_hOqPltEvFH3daJ3HYtY_3FInv3U5xIHprg1FS7b2SP8fCf48r7DvVg=@emersion.fr>

On Wed, Sep 2, 2020 at 2:40 PM Simon Ser <contact@emersion.fr> wrote:
>
> Looks fine to me!
>
> Acked-by: Simon Ser <contact@emersion.fr>
>
> I suppose something similar happens in user-space: gbm_bo_create
> without modifiers needs to properly set the implicit modifier, ie.
> gbm_bo_get_modifier needs to return the effective modifier. Is this
> something already documented?

I don't think that happens, but it has come up in discussions. It's
kinda different scenario though: getfb2 is for cross-compositor stuff,
enabling smooth transitions at boot-up and when switching. So you have
a legit reason for mixing modifier-aware userspace with
non-modifier-aware userspace. And the modifier-aware userspace would
like that everything works with modifiers consistently, including
getfb2. But gbm is just within a single process, and that should
either run all with modifiers, or not at all, since these worlds just
dont mix well. Hence I'm not seeing much use for that, -modesetting
being a confused mess nonwithstanding :-)

Cheers, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-02 10:24 Daniel Vetter
2020-09-02 11:02 ` Pekka Paalanen
2020-09-02 11:15   ` Daniel Vetter
2020-09-02 11:34     ` Pekka Paalanen
2020-09-02 12:40 ` Simon Ser
2020-09-02 12:44   ` Daniel Vetter [this message]
2020-09-02 12:49     ` Simon Ser
2020-09-02 12:56       ` Daniel Stone
2020-09-02 14:29       ` Bas Nieuwenhuizen
2020-09-02 14:29       ` Daniel Vetter
2020-09-02 14:59         ` Simon Ser
2020-09-07  8:31           ` Daniel Vetter
2020-09-07  8:37             ` Simon Ser
2020-09-07  8:41               ` Daniel Vetter
2020-09-07  9:07                 ` Pekka Paalanen
2020-09-07 13:51                   ` Daniel Vetter
2020-09-17 16:47 Daniel Vetter
2020-09-17 17:24 ` Bas Nieuwenhuizen
2020-09-23 15:53   ` Daniel Vetter

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