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From: Thierry Reding <thierry.reding@gmail.com>
To: Rob Clark <robdclark@gmail.com>
Cc: "linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH 02/36] drm/plane: Make ->atomic_update() mandatory
Date: Fri, 23 Jan 2015 10:18:57 +0100	[thread overview]
Message-ID: <20150123091856.GA3835@ulmo> (raw)
In-Reply-To: <CAF6AEGvObX_YBvw7f+SytnBokpdQopom-sWGoxaPG2k+g1YjTA@mail.gmail.com>


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On Tue, Jan 20, 2015 at 08:51:15AM -0500, Rob Clark wrote:
> On Tue, Jan 20, 2015 at 5:48 AM, Thierry Reding
> <thierry.reding@gmail.com> wrote:
> > From: Thierry Reding <treding@nvidia.com>
> >
> > There is no use-case where it would be useful for drivers not to
> > implement this function and the transitional plane helpers already
> > require drivers to provide an implementation.
> >
> > Signed-off-by: Thierry Reding <treding@nvidia.com>
> > ---
> >  drivers/gpu/drm/drm_atomic_helper.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> > index d467185f7942..010661f23035 100644
> > --- a/drivers/gpu/drm/drm_atomic_helper.c
> > +++ b/drivers/gpu/drm/drm_atomic_helper.c
> > @@ -1108,7 +1108,7 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
> >
> >                 funcs = plane->helper_private;
> >
> > -               if (!funcs || !funcs->atomic_update)
> > +               if (!funcs)
> 
> maybe WARN_ON() here.. or drm_universal_plane_init(), or somewhere,
> for missing mandatory fxns would be a nice thing to avoid explosions
> under console_lock for first modeset?

WARN_ON() here isn't going to do you any good under console_lock and
may drivers use drm_universal_plane_init() without having converted to
atomic mode-setting.

Adding a comment to kerneldoc that it's mandatory is probably the best
we can do here.

Thierry

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  reply	other threads:[~2015-01-23  9:18 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-20 10:48 [PATCH 00/36] drm/tegra: Atomic mode-setting conversion Thierry Reding
2015-01-20 10:48 ` [PATCH 01/36] clk: Introduce clk_try_parent() Thierry Reding
2015-01-20 18:02   ` Mike Turquette
2015-01-20 18:16     ` Rob Clark
2015-01-21 15:12       ` Thierry Reding
     [not found]   ` <1421750935-4023-2-git-send-email-thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-20 19:21     ` Stephen Boyd
2015-01-21 15:05       ` Thierry Reding
2015-01-21 16:13   ` [PATCH v2] clk: Introduce clk_has_parent() Thierry Reding
     [not found]     ` <1421856780-32103-1-git-send-email-thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-22  0:16       ` Stephen Boyd
     [not found]         ` <54C04145.1010906-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2015-01-22  7:37           ` Thierry Reding
2015-01-22 20:25             ` Stephen Boyd
2015-01-23  9:34               ` Thierry Reding
2015-01-25  1:02                 ` Mike Turquette
2015-01-20 10:48 ` [PATCH 02/36] drm/plane: Make ->atomic_update() mandatory Thierry Reding
2015-01-20 11:10   ` Daniel Vetter
     [not found]   ` <1421750935-4023-3-git-send-email-thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-20 13:51     ` Rob Clark
2015-01-23  9:18       ` Thierry Reding [this message]
2015-01-23  9:26     ` [PATCH v2] " Thierry Reding
2015-01-20 10:48 ` [PATCH 03/36] drm/plane: Add optional ->atomic_disable() callback Thierry Reding
2015-01-20 11:13   ` Daniel Vetter
2015-01-22 18:57   ` Gustavo Padovan
2015-01-23  9:28   ` [PATCH v4] " Thierry Reding
2015-01-20 10:48 ` [PATCH 04/36] drm/atomic: Add ->atomic_check() to encoder helpers Thierry Reding
2015-01-20 11:07   ` Daniel Vetter
2015-01-20 10:48 ` [PATCH 05/36] drm/atomic: Add drm_atomic_plane_get_crtc_state() Thierry Reding
2015-01-20 11:10   ` Daniel Vetter
     [not found]     ` <20150120111011.GX10113-dv86pmgwkMBes7Z6vYuT8azUEOm+Xw19@public.gmane.org>
2015-01-23  9:32       ` Thierry Reding
2015-01-20 10:48 ` [PATCH 06/36] drm/tegra: Use tegra_commit_dc() in output drivers Thierry Reding
2015-01-20 10:48 ` [PATCH 07/36] drm/tegra: Stop CRTC at CRTC disable time Thierry Reding
2015-01-20 10:48 ` [PATCH 08/36] drm/tegra: dc: Wait for idle when disabled Thierry Reding
2015-01-20 10:48 ` [PATCH 09/36] drm/tegra: Move tegra_drm_mode_funcs to the core Thierry Reding
2015-01-20 10:48 ` [PATCH 10/36] drm/tegra: dc: No longer disable planes at CRTC disable Thierry Reding
2015-01-20 10:48 ` [PATCH 11/36] drm/tegra: Convert output midlayer to helpers Thierry Reding
2015-01-20 10:48 ` [PATCH 12/36] drm/tegra: output: Make ->setup_clock() optional Thierry Reding
2015-01-20 10:48 ` [PATCH 13/36] drm/tegra: Add tegra_dc_setup_clock() helper Thierry Reding
2015-01-20 10:48 ` [PATCH 14/36] drm/tegra: rgb: Demidlayer Thierry Reding
2015-01-20 10:48 ` [PATCH 15/36] drm/tegra: hdmi: Demidlayer Thierry Reding
2015-01-20 10:48 ` [PATCH 16/36] drm/tegra: dsi: Demidlayer Thierry Reding
2015-01-20 10:48 ` [PATCH 17/36] drm/tegra: sor: Demidlayer Thierry Reding
2015-01-20 10:48 ` [PATCH 18/36] drm/tegra: debugfs cleanup cannot fail Thierry Reding
2015-01-20 10:48 ` [PATCH 19/36] drm/tegra: Remove remnants of the output midlayer Thierry Reding
2015-01-20 10:48 ` [PATCH 20/36] drm/tegra: Output cleanup functions cannot fail Thierry Reding
2015-01-20 10:48 ` [PATCH 21/36] drm/tegra: dc: Do not needlessly deassert reset Thierry Reding
2015-01-20 10:48 ` [PATCH 22/36] drm/tegra: Atomic conversion, phase 1 Thierry Reding
2015-01-20 10:48 ` [PATCH 23/36] drm/tegra: Atomic conversion, phase 2 Thierry Reding
2015-01-20 10:48 ` [PATCH 24/36] drm/tegra: Atomic conversion, phase 3, step 1 Thierry Reding
2015-01-20 10:48 ` [PATCH 25/36] drm/tegra: dc: Store clock setup in atomic state Thierry Reding
2015-01-20 10:48 ` [PATCH 26/36] drm/tegra: rgb: Implement ->atomic_check() Thierry Reding
2015-01-20 10:48 ` [PATCH 27/36] drm/tegra: dsi: " Thierry Reding
2015-01-20 10:48 ` [PATCH 28/36] drm/tegra: hdmi: " Thierry Reding
2015-01-20 10:48 ` [PATCH 29/36] drm/tegra: sor: " Thierry Reding
2015-01-20 10:48 ` [PATCH 30/36] drm/tegra: dc: Use atomic clock state in modeset Thierry Reding
2015-01-20 10:48 ` [PATCH 31/36] drm/tegra: Atomic conversion, phase 3, step 2 Thierry Reding
2015-01-20 10:48 ` [PATCH 32/36] drm/tegra: Atomic conversion, phase 3, step 3 Thierry Reding
2015-01-20 10:48 ` [PATCH 33/36] drm/tegra: Remove unused ->mode_fixup() callbacks Thierry Reding
2015-01-20 10:48 ` [PATCH 34/36] drm/tegra: Track active planes in CRTC state Thierry Reding
2015-01-20 11:18   ` Daniel Vetter
2015-01-20 11:43     ` Thierry Reding
     [not found]   ` <1421750935-4023-35-git-send-email-thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-01-23  9:31     ` [PATCH v2] " Thierry Reding
2015-01-20 10:48 ` [PATCH 35/36] drm/tegra: Track tiling and format in plane state Thierry Reding
2015-01-20 10:48 ` [PATCH 36/36] drm/tegra: dc: Unify enabling the display controller Thierry Reding

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