commit 2d650a948ae3d5781fef7f8774bc2eccaca88d8b
author Victor Costan <costan@google.com> Tue Feb 04 12:52:46 2025 -0800
committer CQ Bot <fuchsia-internal-scoped@luci-project-accounts.iam.gserviceaccount.com> Tue Feb 04 12:52:46 2025 -0800
tree 42b7ea599446b39da991fa52b4c9d3d27867482d
parent a4ddbb28a0cea1941bbf642af5da8b81a06c59d7

[display][fidl][banjo] Add type for driver-side ConfigStamp.

This CL creates a compiler-enforced separation between client-side and
driver-side config stamps. Each Display Coordinator client manages its
ConfigStamp value space, and uses the values in calls to
fuchsia.hardware.display/Coordinator.ApplyConfig3(). The Display
Coordinator creates a single "timeline" of monotonically increasing
DriverConfigStamp values, which are communicated to engine drivers.

This CL carries out the following steps.

1. Add the FIDL type fuchsia.hardware.display.engine/ConfigStamp.
2. Add the api-types/cpp type display::DriverConfigStamp.
3. Migrate all in-tree display drivers.
4. Create api-protocols/cpp stubs to facilitate other display driver
   migration.

A future CL will move fuchsia.hardware.display.types/ConfigStamp to
fuchsia.hardware.display/ConfigStamp. This change is not done here to
keep this CL to a manageable size.

Bug: 394148660
Test: fx test //src/graphics/display
Test: Booted workbench_eng.x64 on qemu
Test: ffx target ssh display-tool squares
Multiply: display-api-types-cpp: 1
Multiply: display-api-types-cpp17: 1
Change-Id: Ic7629590f8e7ab67795493114001ec3b1ae64d38
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1198844
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
Reviewed-by: Yilong Li <liyl@google.com>
API-Review: Victor Costan <costan@google.com>
Fuchsia-Auto-Submit: Victor Costan <costan@google.com>