From: Adam Jackson <ajax@redhat.com>
To: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [RFC][PATCH 0/10] Atomic modesetting v2
Date: Wed, 27 Jun 2012 13:11:00 -0400 [thread overview]
Message-ID: <1340817060.12912.45.camel@atropine> (raw)
In-Reply-To: <20120627094826.0f27c10c@jbarnes-desktop>
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On Wed, 2012-06-27 at 09:48 -0700, Jesse Barnes wrote:
> The other thing I'm worried about with atomic mode setting is handling
> the legacy case properly. We'll still need to handle apps that want to
> change one CRTC at a time without altering the state of other CRTCs.
Fortunately that's not true, you can flag-day it (per drm device even,
if we want). If the first thing userspace asks for is atomic modeset
then you simply disallow subsequent non-atomic modesets, and the
reverse. Userspace code will need to grow atomic support anyway, so can
simply treat -EINVAL from trying it as meaning "no kernel support,
revert to the older thing".
This does mean you have to update all of userspace to do the new call
instead of the old one, but that's fine, there's only a handful of
clients for this API.
- ajax
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next prev parent reply other threads:[~2012-06-27 17:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-27 10:24 [RFC][PATCH 0/10] Atomic modesetting v2 ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 01/10] drm: Export drm_property_create_blob() and drm_property_destroy_blob() ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 02/10] drm: Allow signed values for range properties ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 03/10] drm: Allow drm_mode_object_find() to look up an object of any type ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 04/10] drm: Export drm_encoder_crtc_ok ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 05/10] drm: Export drm_crtc_prepare_encoders() ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 06/10] drm: Refactor object property check code ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 07/10] drm: Add MODE_IDS property to connectors ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 08/10] WIP: drm: Atomic modeset ioctl ville.syrjala
2012-08-31 22:47 ` Rob Clark
2012-09-01 11:12 ` Daniel Vetter
2012-09-01 15:58 ` Rob Clark
2012-09-01 16:56 ` Daniel Vetter
2012-09-01 18:05 ` Rob Clark
2012-06-27 10:24 ` [RFC][PATCH 09/10] drm/i915: Split clipping and checking from update_plane hook ville.syrjala
2012-06-27 10:24 ` [RFC][PATCH 10/10] WIP drm/i915: "Atomic" modeset test implementation ville.syrjala
2012-06-27 16:48 ` [RFC][PATCH 0/10] Atomic modesetting v2 Jesse Barnes
2012-06-27 17:11 ` Adam Jackson [this message]
2012-06-27 17:50 ` Dave Airlie
2012-06-27 18:37 ` Ville Syrjälä
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