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display/xlnx_dp: Fix to realize "i2c-ddc" and "aux-to-i2c-bridge"

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xlnx_dp_init() creates these two devices, but they're never realized.
Affects machine xlnx-zcu102.

In theory, a device becomes real only on realize.  In practice, the
transition from unreal to real is a fuzzy one.  The work to make a
device real can be spread between realize methods (fine),
instance_init methods (wrong), and board code wiring up the device
(fine as long as it effectively happens on realize).  Depending on
what exactly is done where, a device can work even when we neglect to
realize it.

These two appear to work.  Nevertheless, it's a clear misuse of the
interface.  Even when it works today (more or less by chance), it can
break tomorrow.

Fix by realizing them in xlnx_dp_realize().

Fixes: 58ac482a66de09a7590f705e53fc6a3fb8a055e8
Cc: KONRAD Frederic <fred.konrad@greensocs.com>
Cc: Alistair Francis <alistair@alistair23.me>
Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-arm@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20200609122339.937862-3-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-06-09 14:23:17 +02:00
parent 2fb1f7d299
commit f6a1f93d6a
1 changed files with 4 additions and 0 deletions
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4
hw/display/xlnx_dp.c
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@ -1266,9 +1266,13 @@ static void xlnx_dp_realize(DeviceState *dev, Error **errp)
DisplaySurface *surface;
struct audsettings as;
qdev_init_nofail(DEVICE(s->aux_bus->bridge));
qdev_init_nofail(DEVICE(s->dpcd));
aux_map_slave(AUX_SLAVE(s->dpcd), 0x0000);
qdev_init_nofail(DEVICE(s->edid));
s->console = graphic_console_init(dev, 0, &xlnx_dp_gfx_ops, s);
surface = qemu_console_surface(s->console);
xlnx_dpdma_set_host_data_location(s->dpdma, DP_GRAPHIC_DMA_CHANNEL,