commit 00d85d2158a486a4714e4bee13329c84c30a10ee
author Su Hong Koo <sukoo@chromium.org> Tue Jun 04 14:23:35 2024
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Tue Jun 04 14:23:35 2024
tree 69736d5f1db6a9d2ccf6b309be113cb78ac25734
parent 146929ca4035a145ce41befe5f8625aa54b2ca49

ozone/drm: Introduce TileProperty to HardwareDisplayControllerInfo

TileProperty is a new struct that represents various information about
a connector that belongs to a tiled display. TileProperty is parsed
from TILE connector property and DisplayID. TileProperty contains
information like ID, layout of the tiles, location of the tile
corresponding to the connector, tile size, etc.

HardwareDisplayControllerInfo represents information required to
initialize and configure a native display. If tiled display support
flag is enabled, GetDisplayInfosAndInvalidCrtcs() will now populate
information about tiled display in HardwareDisplayControllerInfo.

Currently, each tile in a tiled display correspond to one
HardwareDisplayControllerInfo, which leads to each of the tiles being
represented as individual DisplaySnapshot (and therefore displays)
throughout the display stack. This change adds logic to
DrmGpuDisplayManager::GetDisplays() to consolidate multiple
HardwareDisplayControllerInfo for a tiled display into one.
For now, only one HDCI with tile location closest to origin is kept per
tiled display. The logic to consolidate HDCIs will be fleshed out in future
CLs as per go/cros-tile-display-support.

Bug: b:285923912, b:324236939
Test: display_unittests, ozone_unittests, and manual testing of the entire CL chain

Change-Id: I72ddc829a5c45255c3bc7722877f751c8c439b2f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5473092
Reviewed-by: Gil Dekel <gildekel@chromium.org>
Commit-Queue: Su Hong Koo <sukoo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1309937}