[PATCH 01/17] drm/mgag200: Remove HW cursor

[Gerd Hoffmann]

On Wed, Apr 29, 2020 at 07:51:07PM +0200, Sam Ravnborg wrote:
> On Wed, Apr 29, 2020 at 04:32:22PM +0200, Thomas Zimmermann wrote:
> > The HW cursor of Matrox G200 cards only supports a 16-color palette
> > format. Univeral planes require at least ARGB or a similar component-
> > based format. Converting a cursor image from ARGB to 16 colors does not
> > produce pleasent-looking results in general, so remove the HW cursor.
> 
> What impact does this have in useability?
> Does the cursor behaviour stay the same or?

xorg/wayland switch to software cursor then.  Shouldn't be a big
difference.  If you wanna check how userspace behaves without g200
hardware you can try qemu.  stdvga (bochs-drm.ko) has no hardware
cursor, virtio-vga (virtio-gpu.ko) has a hardware cursor.

> The patch looks fine, but it seems a bit gross ditching curcor support.
> But maybe it is the right choice, I dunno.

cirrus driver does the same.  The hardware has cursor support, but not
rgba, and it is not used.

take care,
  Gerd