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bcm2835_fb: add framebuffer device for Raspberry Pi

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The framebuffer occupies the upper portion of memory (64MiB by
default), but it can only be controlled/configured via a system
mailbox or property channel (to be added by a subsequent patch).

Signed-off-by: Grégory ESTRADE <gregory.estrade@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Message-id: 1457467526-8840-4-git-send-email-Andrew.Baumann@microsoft.com
[AB: added Windows (BGR) support and cleanup/refactoring for upstream submission]
Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Grégory ESTRADE 2016-03-16 17:06:01 +00:00 • committed by Peter Maydell
parent 97398d900c
commit 5e9c2a8dac
7 changed files with 517 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

38
hw/arm/bcm2835_peripherals.c
View file

@ -62,6 +62,16 @@ static void bcm2835_peripherals_init(Object *obj)
object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
OBJECT(&s->mbox_mr), &error_abort);
/* Framebuffer */
object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL);
object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size",
&error_abort);
qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default());
object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
OBJECT(&s->gpu_bus_mr), &error_abort);
/* Property channel */
object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY);
object_property_add_child(obj, "property", OBJECT(&s->property), NULL);
@ -84,7 +94,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
Object *obj;
MemoryRegion *ram;
Error *err = NULL;
uint32_t ram_size;
uint32_t ram_size, vcram_size;
CharDriverState *chr;
int n;
@ -174,6 +184,32 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
INTERRUPT_ARM_MAILBOX));
/* Framebuffer */
vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size",
&err);
if (err) {
error_propagate(errp, err);
return;
}
object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size,
"vcram-base", &err);
if (err) {
error_propagate(errp, err);
return;
}
object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
if (err) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
/* Property channel */
object_property_set_int(OBJECT(&s->property), ram_size, "ram-size", &err);
if (err) {