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Docs: the car's screen is 1920x720 at 160 dpi; no colour property

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Read on the car with 2.16.2: panel 1920x720 px at 160 dpi, app window
1778x720 px (the car's own sidebar takes the rest), so EVProfile's
1280x480 (1920x720 at 240 dpi, in dp) does not apply here. The colour
probe found only ro.build.mtk2712.vehicle_type = AS28: the paint colour
is not among the system properties. FIRMWARE.md, mise.toml and
SPECS.md updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki
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nils
2026-10-18 19:56:57 +02:00
co-authored by Claude Opus 5.5
parent bfa33d51bd
commit 98ec3f3fcf
3 changed files with 15 additions and 21 deletions
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FIRMWARE.md
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@@ -11,23 +11,12 @@ development. It must not be treated as a vendor specification.
| Android | 9 (Pie) — **API 28** |
| Chipset | MediaTek **MT2712** |
| Device | `mt2712_saic_eh32` (eh32 = MG4) |
| Display | Sources disagree, see below. The Logs tab's **SCREEN** line shows what the car reports. |
| Display | **1920×720 px @ 160 dpi**; the app window is **1778×720 px** (≈1778×640 dp for layouts), the car's own sidebar taking the rest. Confirmed on the car 2026-10-18 (Logs → SCREEN, `SWI68`). |
| Emulator display profile | **1920×720 @ 160 dpi** |
| `ro.build.mtk2712.vehicle_type` | `AS28` (a vehicle type code; the paint colour is not among the system properties) |
**Display, unconfirmed.** Three figures are in circulation:
- **1920×720 px**, the figure this project has used (emulator profile, layouts).
- **1280×480**, from [EVProfile's README](https://github.com/malys/EVProfile) ("forced
landscape"). That is exactly 1920×720 px at 240 dpi expressed in dp, the unit layouts use —
so it may be the same panel at a higher density. EVProfile also notes that this platform lets
the density be changed per app.
- An app window of **1778×720**, reported upstream: the car's own sidebar taking part of the
width.
The app has worked on the car with layouts designed at 1920×720 dp, which fits 160 dpi better
than 240 (checked on the emulator: at 240 dpi the sidebar needs scrolling and the Overview's
cards no longer fit). Since 2.16.2 the Logs tab shows the panel's pixels and density and the
app window in px and dp; a photo of that line settles it.
EVProfile's README gives the display as 1280×480. That is 1920×720 px at 240 dpi expressed in
dp; on this car the density is 160 dpi, so it does not apply here.
## Signing caveat
@@ -58,5 +47,5 @@ follow the same path. See `AGENTS.md` for the full per-signal split.
## Emulator fidelity
The `mise` emulator tasks use an API 33 automotive AVD for the car service and an API 28
AVD at **1920×720 @ 160 dpi** for the screen (see "Display, unconfirmed" above). Neither exposes the SAIC vendor properties,
AVD at **1920×720 @ 160 dpi** for the screen, as on the car. Neither exposes the SAIC vendor properties,
so vehicle-specific behaviour still requires on-vehicle validation.