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gpu: host1x: Do not setup DMA for virtual devices 

[ Upstream commit 8ab58f6841 ]

The host1x devices are virtual compound devices and do not perform DMA
accesses themselves, so they do not need to be set up for DMA.

Ideally we would also not need to set up DMA masks for the virtual
devices, but we currently still need those for legacy support on old
hardware.

Tested-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240314154943.2487549-1-thierry.reding@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thierry Reding 2024-03-14 16:49:43 +01:00 committed by Greg Kroah-Hartman
parent ce0e99cae0
commit 1061afd581
1 changed files with 0 additions and 8 deletions
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8
drivers/gpu/host1x/bus.c
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@ -351,11 +351,6 @@ static int host1x_device_uevent(const struct device *dev,
return 0;
}
static int host1x_dma_configure(struct device *dev)
{
return of_dma_configure(dev, dev->of_node, true);
}
static const struct dev_pm_ops host1x_device_pm_ops = {
.suspend = pm_generic_suspend,
.resume = pm_generic_resume,
@ -369,7 +364,6 @@ struct bus_type host1x_bus_type = {
.name = "host1x",
.match = host1x_device_match,
.uevent = host1x_device_uevent,
.dma_configure = host1x_dma_configure,
.pm = &host1x_device_pm_ops,
};
@ -458,8 +452,6 @@ static int host1x_device_add(struct host1x *host1x,
device->dev.bus = &host1x_bus_type;
device->dev.parent = host1x->dev;
of_dma_configure(&device->dev, host1x->dev->of_node, true);
device->dev.dma_parms = &device->dma_parms;
dma_set_max_seg_size(&device->dev, UINT_MAX);