From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Zhang Subject: Re: [PATCH v2 12/12] JUST FOR TEST: Add one-shot trigger to update display Date: Wed, 1 Jul 2015 20:43:01 +0800 Message-ID: <5593E055.5050305@nvidia.com> References: <1435738915-31973-1-git-send-email-markz@nvidia.com> <1435738915-31973-13-git-send-email-markz@nvidia.com> <20150701083617.GF30960@phenom.ffwll.local> <5593AC80.10801@nvidia.com> <20150701103457.GD24055@phenom.ffwll.local> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20150701103457.GD24055-dv86pmgwkMBes7Z6vYuT8azUEOm+Xw19@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Daniel Vetter Cc: thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: linux-tegra@vger.kernel.org On 07/01/2015 06:34 PM, Daniel Vetter wrote: > On Wed, Jul 01, 2015 at 05:01:52PM +0800, Mark Zhang wrote: >> On 07/01/2015 04:36 PM, Daniel Vetter wrote: >>> On Wed, Jul 01, 2015 at 04:21:55PM +0800, Mark Zhang wrote: >>>> This HACK adds a workqueue to refresh the display periodically. >>>> This is used just for testing. >>> >>> ->dirty is the drm hook you're looking for, it's meant to flush out any >>> frontbuffer rendering. Generic kms clients using the dumb buffers (e.g. >>> fedora boot splash) use this already. >>> >> >> Oh... I did a grep in drm source and are you talking about >> "drm_framebuffer_funcs->dirty"? Yeah, that should work for me.. but that >> requires userspace sending IOCTL to trigger, right? Honestly I'm lazy so >> I created this HACK so that I don't need userspace to test. > > Yeah userspace needs to send ioctl already after each drawing. Generic > userspace does that already since it's required by qxl, udl, soon i915 and > probably a few others too. fbdev emulation is more annyoing but there's > code to move around in these drivers (qxl seems best to me as a starting > point) too. > Alright, this makes sense. I have no idea about qxl, what I have now is an ubuntu running on Tegra114. So I'm wondering what I suppose to do is installing qemu on the ubuntu? Mark > Imo without this you shouldn't merge one-shot, at least not enabled by > default. > -Daniel >