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gpu: host1x: Correctly parse linear ranges of context devices

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The previous parsing of the iommu-map property assumed each context
device has its own one-length entry in the device tree. This has worked
fine so far, but on Tegra264 larger numbers of context devices are
usable, so it's better to support linear ranges as well.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20260622-t264-host1x-v2-3-ff7364d9ff7b@nvidia.com
This commit is contained in:
Mikko Perttunen
2026-06-22 15:57:40 +09:00
committed by Thierry Reding
parent fd58cd8974
commit 5db6378b32
1 changed files with 11 additions and 2 deletions
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13
drivers/gpu/host1x/context.c
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@@ -24,7 +24,7 @@ int host1x_memory_context_list_init(struct host1x *host1x)
struct host1x_memory_context_list *cdl = &host1x->context_list;
struct device_node *node = host1x->dev->of_node;
struct host1x_memory_context *ctx;
unsigned int i;
unsigned int devs, i;
int err;
cdl->devs = NULL;
@@ -35,7 +35,16 @@ int host1x_memory_context_list_init(struct host1x *host1x)
if (err < 0)
return 0;
cdl->len = err / 4;
devs = 0;
for (i = 0; i < err / 4; i++) {
u32 length;
of_property_read_u32_index(node, "iommu-map", i * 4 + 3, &length);
devs += length;
}
cdl->len = devs;
cdl->devs = kzalloc_objs(*cdl->devs, cdl->len);
if (!cdl->devs)
return -ENOMEM;