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gpu: host1x: Retrieve syncpoint shim information

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Retrieve information for the memory syncpoint shim from the device tree
and add an interface to provide the information to other drivers.

The memory syncpoint shim is a special area on the data backbone,
where each memory page corresponds to a host1x syncpoint. Reading
the page returns the value of the syncpoint, and writing to it
increments the syncpoint by one.

Jira HOSTX-5722
Bug 4919132

Change-Id: Ie892abd754f7543fbc56844dcc40cab3f837e305
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3252025
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Santosh BS <santoshb@nvidia.com>
This commit is contained in:
Mikko Perttunen
2024-11-19 07:05:02 +00:00
committed by Jon Hunter
parent 62c37911c9
commit af2a177038
4 changed files with 69 additions and 0 deletions
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3
drivers/gpu/host1x/include/linux/host1x-next.h
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@@ -257,6 +257,9 @@ u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base);
void host1x_syncpt_release_vblank_reservation(struct host1x_client *client,
u32 syncpt_id);
int host1x_syncpt_get_shim_info(struct host1x *host, phys_addr_t *base, u32 *stride,
u32 *num_syncpts);
struct dma_fence *host1x_fence_create(struct host1x_syncpt *sp, u32 threshold,
bool timeout);
int host1x_fence_extract(struct dma_fence *fence, u32 *id, u32 *threshold);