[PATCH v4 3/3] drm/vkms: Switch to dynamic allocation for CRTC

[José Expósito]

On Mon, Jan 20, 2025 at 06:26:07PM +0100, Louis Chauvet wrote:
> On 20/01/25 - 17:23, José Expósito wrote:
> > > A specific allocation for the CRTC is not strictly necessary at this
> > > point, but in order to implement dynamic configuration of VKMS (configFS),
> > > it will be easier to have one allocation per CRTC.
> > > 
> > > Reviewed-by: Maxime Ripard <mripard at kernel.org>
> > > Signed-off-by: Louis Chauvet <louis.chauvet at bootlin.com>
> > > ---
> 
> [...]
> 
> > > +	/* Initialize the writeback component */
> > >  	if (vkmsdev->config->writeback) {
> > > -		writeback = vkms_enable_writeback_connector(vkmsdev, crtc);
> > > +		writeback = vkms_enable_writeback_connector(vkmsdev, output);
> > >  		if (writeback)
> > >  			DRM_ERROR("Failed to init writeback connector\n");
> > >  	}
> > 
> > Hi Louis,
> > 
> > Thanks for fixing this error condition.
> > 
> > I have been working and running automated tests on top of this series and
> > I haven't found any other issue.
> > 
> > Reviewed-by: José Expósito <jose.exposito89 at gmail.com>
> 
> Thanks a lot! I will merge this tomorrow.
> 
> What is your automated tests series? 

On the kernel side, I keep working on the ConfigFS patches here:
https://github.com/JoseExposito/linux/commits/patch-vkms-configfs/

It sits on top of your work to switch to managed memory. But now that
the code is merged, it needs to be rebased.
You'll notice that I kept your signed-off-by in many patches, as I
tried to reuse as much common code as possible.

About the automated testing, the series could be split in two:
- vkms_config.h/c, which is tested with KUnit
- ConfigFS, tested with IGT:
  https://gitlab.freedesktop.org/jexposit/igt-gpu-tools/-/commits/vkms-configfs

I made some wrong assumptions with connectors, for example, it is
possible to create a device without connectors and hot-add/remove
them later, and I'm still fixing them and writing tests.
Once that work is done I'll send the series to the ML.

Jose

> I will also send tomorrow a new rebased iteration for:
> - https://patchwork.freedesktop.org/series/140786/
> - https://patchwork.freedesktop.org/series/133698/
> - https://patchwork.freedesktop.org/patch/625883/
> 
> If someone can look on them and leave some reviews, I will be very happy 
> to apply them!
> 
> I will also send a first version of the configFS work (two distincts 
> series to make the review easier). 
> 
> Thanks a lot,
> Louis Chauvet
>