linux-kernel - Re: [PATCH v3 17/23] drm/qxl: use generic fbdev emulation

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Date:   Mon, 28 Jan 2019 09:59:51 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     Noralf Trønnes <noralf@...nnes.org>
Cc:     dri-devel@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVER FOR QXL VIRTUAL GPU" 
        <virtualization@...ts.linux-foundation.org>,
        "open list:DRM DRIVER FOR QXL VIRTUAL GPU" 
        <spice-devel@...ts.freedesktop.org>,
        Dave Airlie <airlied@...hat.com>
Subject: Re: [PATCH v3 17/23] drm/qxl: use generic fbdev emulation

On Fri, Jan 25, 2019 at 06:25:27PM +0100, Noralf Trønnes wrote:
> 
> 
> Den 18.01.2019 13.20, skrev Gerd Hoffmann:
> > Switch qxl over to the new generic fbdev emulation.
> > 
> > Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
> > ---
> >  drivers/gpu/drm/qxl/qxl_display.c | 7 -------
> >  drivers/gpu/drm/qxl/qxl_drv.c     | 2 ++
> >  2 files changed, 2 insertions(+), 7 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
> > index ef832f98ab..9c751f01e3 100644
> > --- a/drivers/gpu/drm/qxl/qxl_display.c
> > +++ b/drivers/gpu/drm/qxl/qxl_display.c
> > @@ -1221,18 +1221,11 @@ int qxl_modeset_init(struct qxl_device *qdev)
> >  	qxl_display_read_client_monitors_config(qdev);
> >  
> >  	drm_mode_config_reset(&qdev->ddev);
> > -
> > -	/* primary surface must be created by this point, to allow
> > -	 * issuing command queue commands and having them read by
> > -	 * spice server. */
> > -	qxl_fbdev_init(qdev);
> >  	return 0;
> >  }
> >  
> >  void qxl_modeset_fini(struct qxl_device *qdev)
> >  {
> > -	qxl_fbdev_fini(qdev);
> > -
> >  	qxl_destroy_monitors_object(qdev);
> >  	drm_mode_config_cleanup(&qdev->ddev);
> >  }
> > diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
> > index 13c8a662f9..3fce7d16df 100644
> > --- a/drivers/gpu/drm/qxl/qxl_drv.c
> > +++ b/drivers/gpu/drm/qxl/qxl_drv.c
> > @@ -93,6 +93,8 @@ qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> >  	if (ret)
> >  		goto modeset_cleanup;
> >  
> > +	drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "qxl");
> 
> I couldn't find that this was part of old fbdev code, so it would be
> nice to mention it in the commit message.

It actually is, but a bit hidden because it doesn't use a helper you can
easily grep for.  Instead sets fb_info->apertures->ranges[0] in
qxlfb_create(), which has the same effect.

cheers,
  Gerd