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From: Stefan Lengfeld <contact@stefanchrist.eu>
To: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>,
	David Airlie <airlied@linux.ie>,
	Sean Paul <seanpaul@chromium.org>,
	Jani Nikula <jani.nikula@linux.intel.com>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH v4 1/1] drm/fb-helper: implement ioctl FBIO_WAITFORVSYNC
Date: Sun, 5 Mar 2017 23:23:28 +0100	[thread overview]
Message-ID: <20170305222328.GA25089@sill.h.stcim.de> (raw)
In-Reply-To: <9f67ae4055ab0bc093d7d94e503a0d6d1909d856.1488296169.git-series.maxime.ripard@free-electrons.com>

Hi Maxime,

On Tue, Feb 28, 2017 at 04:36:51PM +0100, Maxime Ripard wrote:
> Implement legacy framebuffer ioctl FBIO_WAITFORVSYNC in the generic
> framebuffer emulation driver. Legacy framebuffer users like non kms/drm
> based OpenGL(ES)/EGL implementations may require the ioctl to
> synchronize drawing or buffer flip for double buffering. It is tested on
> the i.MX6.
> 
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> Tested-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  drivers/gpu/drm/drm_fb_helper.c | 68 ++++++++++++++++++++++++++++++++++-
>  include/drm/drm_fb_helper.h     | 12 +++++-
>  2 files changed, 79 insertions(+), 1 deletion(-)

I have tested the current HEAD of drm-misc-next. It includes this patch
and the patch ("drm/fb-helper: Add multi buffer support for cma fbdev").
On my i.MX6 board with HDMI output both patches work as advertised.
Multi-buffering with ioctls FBIO_WAITFORVSYNC and FBIOPAN_DISPLAY is
possible.

Kind Regards
    Stefan Lengfeld

      parent reply	other threads:[~2017-03-05 22:50 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-28 15:36 [PATCH v4 0/1] drm: Support framebuffer panning Maxime Ripard
2017-02-28 15:36 ` [PATCH v4 1/1] drm/fb-helper: implement ioctl FBIO_WAITFORVSYNC Maxime Ripard
2017-03-01 21:31   ` Stefan Lengfeld
2017-03-02  7:12   ` Daniel Vetter
2017-03-02 10:09     ` Daniel Vetter
2017-03-05 22:23   ` Stefan Lengfeld [this message]

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