From f6a1f93d6a43c6ede9f32de3b4ccb126998f322e Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 9 Jun 2020 14:23:17 +0200 Subject: [PATCH] display/xlnx_dp: Fix to realize "i2c-ddc" and "aux-to-i2c-bridge" 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 Cc: Alistair Francis Cc: "Edgar E. Iglesias" Cc: Peter Maydell Cc: qemu-arm@nongnu.org Signed-off-by: Markus Armbruster Reviewed-by: Edgar E. Iglesias Reviewed-by: Alistair Francis Message-Id: <20200609122339.937862-3-armbru@redhat.com> --- hw/display/xlnx_dp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/display/xlnx_dp.c b/hw/display/xlnx_dp.c index 8d940cd8d1..5210412e55 100644 --- a/hw/display/xlnx_dp.c +++ b/hw/display/xlnx_dp.c @@ -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, -- 2.11.4.GIT