All of lore.kernel.org
 help / color / mirror / Atom feed
From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Liviu Dudau <Liviu.Dudau@arm.com>
Cc: Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	DRI Development <dri-devel@lists.freedesktop.org>,
	John Stultz <john.stultz@linaro.org>,
	Thierry Reding <treding@nvidia.com>
Subject: Re: [PATCH] drm/fb-helper: Restore first connection behaviour on deferred setup
Date: Fri, 30 Jun 2017 20:13:58 +0200	[thread overview]
Message-ID: <CAKMK7uH4OMjp1vZEXB=0qn4oaOArLBT3eSjS7P5Hm_3APLi_vg@mail.gmail.com> (raw)
In-Reply-To: <20170630165155.8658-1-Liviu.Dudau@arm.com>

On Fri, Jun 30, 2017 at 6:51 PM, Liviu Dudau <Liviu.Dudau@arm.com> wrote:
> Prior to commit b0aa06e9a7fd ("drm/fb-helper: Support deferred setup"),
> if no output is connected at framebuffer setup time, we get a default
> 1024x768 mode that is going to be used when we first connect a monitor.
> After the commit, on first connection after deferred setup, we probe
> the monitor and get the preferred resolution, but no mode get set
> because the drm_fb_helper_hotplug_event() function returns early
> when the setup has been deferred. That is different from what happens
> on a second re-connect of the monitor, when the native mode get set.
>
> Create a more consistent behaviour by checking in the
> drm_fb_helper_hotplug_event() function if the deferred setup is still
> active. If not, that means we now have a valid framebuffer that can be
> used for setting the correct mode.
>
> Fixes: b0aa06e9a7fd ("drm/fb-helper: Support deferred setup")
> Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>

I thought the analysis over irc was that fbcon picked a different
driver as it's console, and that's why nothing shows up on the malidp
output in the deferred case? That's mildly annoying, but iirc fbcon
has always been rather erratic in multi-gpu setups. Although I thought
that it would by default bind all fbdev drivers as consoles (and then
you need to rebind the right console driver, if the right Kconfig is
enabled, through sysfs).

Either way if the register_framebuffer() call in initial_config isn't
good enough, then we need to add the set_par in initial_config
unconditionally, not just in the deferred probe case. Just disable
fbcon entirely for testing, in that case even without deferred probing
nothing will show up.

I'd say if this is still needed in the single gpu case then we need to
investigate more, but for multi-gpu it is what it is (aka fbcon is not
great).
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

  reply	other threads:[~2017-06-30 18:13 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-27 14:59 [PATCH 00/13] fbdev locking rework and deferred setup, take 2 Daniel Vetter
2017-06-27 14:59 ` [PATCH 01/13] drm/fb-helper: Push down modeset lock into FB helpers Daniel Vetter
2017-06-29  9:10   ` Maarten Lankhorst
2017-06-29  9:23     ` Daniel Vetter
2017-06-29  9:33       ` Maarten Lankhorst
2017-06-29  9:44         ` Daniel Vetter
2017-06-29 11:13           ` Maarten Lankhorst
2017-06-29 12:38             ` Daniel Vetter
2017-06-27 14:59 ` [PATCH 02/13] drm/i915: Drop FBDEV #ifdev in mst code Daniel Vetter
2017-06-27 14:59 ` [PATCH 03/13] drm/fb-helper: Add top-level lock Daniel Vetter
2017-06-27 14:59 ` [PATCH 04/13] drm/fb-helper: Push locking in fb_is_bound Daniel Vetter
2017-06-27 14:59 ` [PATCH 05/13] drm/fb-helper: Drop locking from the vsync wait ioctl code Daniel Vetter
2017-06-27 14:59 ` [PATCH 06/13] drm/fb-helper: Push locking into pan_display_atomic|legacy Daniel Vetter
2017-06-27 14:59 ` [PATCH 07/13] drm/fb-helper: Push locking into restore_fbdev_mode_atomic|legacy Daniel Vetter
2017-06-27 14:59 ` [PATCH 08/13] drm/fb-helper: Stop using mode_config.mutex for internals Daniel Vetter
2017-06-27 14:59 ` [PATCH 09/13] drm/fb-helper: Split dpms handling into legacy and atomic paths Daniel Vetter
2017-06-29 10:22   ` Maarten Lankhorst
2017-06-29 10:31     ` Daniel Vetter
2017-06-29 10:58       ` Maarten Lankhorst
2017-06-29 11:00         ` Daniel Vetter
2017-06-29 11:23           ` Maarten Lankhorst
2017-06-27 14:59 ` [PATCH 10/13] drm/fb-helper: Support deferred setup Daniel Vetter
2017-06-28 11:32   ` [PATCH] " Daniel Vetter
2017-06-28 16:24     ` Liviu Dudau
2017-06-29 10:59     ` Maarten Lankhorst
2017-06-29 12:36       ` Daniel Vetter
2017-06-30 16:51     ` [PATCH] drm/fb-helper: Restore first connection behaviour on " Liviu Dudau
2017-06-30 18:13       ` Daniel Vetter [this message]
2017-07-03  8:44         ` Liviu Dudau
2017-07-03 16:33           ` Daniel Vetter
2017-06-27 14:59 ` [PATCH 11/13] drm/exynos: Remove custom FB helper " Daniel Vetter
2017-06-27 14:59 ` [PATCH 12/13] drm/hisilicon: " Daniel Vetter
2017-06-28  9:08   ` [PATCH] " Daniel Vetter
2017-06-27 14:59 ` [PATCH 13/13] drm/atomic-helper: Realign function parameters Daniel Vetter
2017-06-27 15:01   ` Deucher, Alexander
2017-06-27 15:42   ` Harry Wentland
2017-07-04 15:16     ` Daniel Vetter
2017-06-27 15:30 ` ✓ Fi.CI.BAT: success for fbdev locking rework and deferred setup, take 2 Patchwork
2017-06-27 23:02 ` [PATCH 00/13] " John Stultz
2017-06-28  7:36   ` Daniel Vetter
2017-06-28  9:28 ` ✓ Fi.CI.BAT: success for fbdev locking rework and deferred setup, take 2 (rev2) Patchwork
2017-06-28 12:28 ` ✓ Fi.CI.BAT: success for fbdev locking rework and deferred setup, take 2 (rev3) Patchwork

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAKMK7uH4OMjp1vZEXB=0qn4oaOArLBT3eSjS7P5Hm_3APLi_vg@mail.gmail.com' \
    --to=daniel.vetter@ffwll.ch \
    --cc=Liviu.Dudau@arm.com \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=intel-gfx@lists.freedesktop.org \
    --cc=john.stultz@linaro.org \
    --cc=treding@nvidia.com \
    --subject='Re: [PATCH] drm/fb-helper: Restore first connection behaviour on deferred setup' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.