From: "Souza, Jose" <jose.souza@intel.com>
To: "intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
"chris@chris-wilson.co.uk" <chris@chris-wilson.co.uk>
Cc: "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH 1/6] drm: Let userspace check if driver supports modeset
Date: Tue, 17 Jul 2018 17:02:17 +0000 [thread overview]
Message-ID: <be5eebe7a60794d8af90918cee22851377b76506.camel@intel.com> (raw)
In-Reply-To: <153181251011.25073.5897203467945081196@skylake-alporthouse-com>
On Tue, 2018-07-17 at 08:28 +0100, Chris Wilson wrote:
> Quoting José Roberto de Souza (2018-07-16 23:38:36)
> > GPU accelerators usually don't have display block or the display
> > driver part can be disable when building driver(for servers it save
> > some resources) so it is important let userspace check this
> > capability too.
>
> We currently communicate that by having no modeset resources. What
> does
> another cap bit accomplish that we don't already know?
This is a hackish way to check if driver support modeset,
drmModeGetResources()/drm_mode_getresources() can fail and return null
by other reasons and just check for the errno value can be misleading
too.
> -Chris
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next prev parent reply other threads:[~2018-07-17 17:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-16 22:38 [PATCH 1/6] drm: Let userspace check if driver supports modeset José Roberto de Souza
2018-07-16 22:38 ` [PATCH 2/6] drm/i915: Set PCH as NOP if display is disabled José Roberto de Souza
2018-07-16 22:38 ` [PATCH 3/6] drm/i915: Move out non-modeset calls from modeset init and cleanup José Roberto de Souza
2018-07-17 7:27 ` [Intel-gfx] " Chris Wilson
2018-07-16 22:38 ` [PATCH 4/6] drm/i915: Move drm_vblank_init() to i915_load_modeset_init() José Roberto de Souza
2018-07-16 22:38 ` [PATCH 5/6] drm/i915: Do not call modeset related functions when display is disabled José Roberto de Souza
2018-07-16 22:38 ` [PATCH 6/6] drm/i915: Remove redundante checks for num_pipes == 0 José Roberto de Souza
2018-07-17 7:28 ` [Intel-gfx] [PATCH 1/6] drm: Let userspace check if driver supports modeset Chris Wilson
2018-07-17 17:02 ` Souza, Jose [this message]
2018-07-17 20:04 ` Chris Wilson
2018-08-15 21:15 ` Rodrigo Vivi
2018-08-15 21:46 ` [Intel-gfx] " Souza, Jose
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