From: Helge Deller <deller@gmx.de>

The original Artist graphics used the GSC bus, was often installed in old
32-bit machines (e.g. 715) and can not be used on 64-bit machines.
This is why this patch makes the artist driver dependend on the Lasi chip,
which was never used in a 64-bit machine.

Note that there exists a variant of Artist for the PCI-bus (Visualize-EG PCI).
It has quite some differences in the registers, and would require that we write
a PCI ROM for it, so that Linux and HP-UX would be able to use it.

Instead, for now, users can simply use a standard VGA or ATI PCI graphics card
on Linux.  This can be enabled on the command line with "-device ati-vga" or
"-device VGA".  If the "-nographic" option is omitted, a PCI OCHI controller
with USB keyboard and USB mouse will be added automatically.

This fixes graphics support on 64-bit hppa machines and allows us to boot up a
64-bit Linux installation with VGA graphics.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20260330211859.19317-3-deller@kernel.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/hppa/machine.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index 3663bac53bd..58e76bee2e4 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -384,7 +384,8 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     SysBusDevice *s;
 
     /* Graphics setup. */
-    if (machine->enable_graphics && vga_interface_type != VGA_NONE) {
+    if (lasi_dev && machine->enable_graphics &&
+        vga_interface_type != VGA_NONE) {
         dev = qdev_new("artist");
         s = SYS_BUS_DEVICE(dev);
         bool disabled = object_property_get_bool(OBJECT(dev), "disable", NULL);
-- 
2.53.0