Bug 199495

Summary:	arm64: dts: rockchip: rk3399 Bob variant support
Product:	Drivers	Reporter:	matthieu.bouron
Component:	Other	Assignee:	drivers_other
Status:	NEW ---
Severity:	normal
Priority:	P1
Hardware:	ARM
OS:	Linux
Kernel Version:	4.17rc2	Subsystem:
Regression:	No	Bisected commit-id:

Description matthieu.bouron 2018-04-24 16:08:48 UTC

Hello,

The Bob variant of the rockchip rk3399 SOC as found as in the Asus C101pa chromebook is missing some support from upstream (in particular the display panel).

It looks like the "relevant" device tree patches can be found here:
https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-4.4

git log --oneline |grep -i -e CHROMIUM.*bob.* gives:
0c4385cb4e7e CHROMIUM: arm64: dts: rockchip: Update thermal numbers on rk3399-bob for rev4+
d508603b7642 CHROMIUM: drm/bridge: add a quirk for Bob panel
ab829ddd49f0 CHROMIUM: arm64: dts: rockchip: Change DDR part for bob rev4+
5e3f8d3e3cbb CHROMIUM: arm64: dts: rockchip: add wifi tx power table for bob
d7e79f530cda CHROMIUM: arm64: dts: rockchip: Update thermal numbers on rk3399-bob
1eef1b018e7a CHROMIUM: arm64: dts: rockchip: remove the bump 50mv for bob little cpu
56fe163182e4 CHROMIUM: arm64: dts: rockchip: Bump voltages for bob rev2+
ab2d1da64fb9 CHROMIUM: arm64: dts: rockchip: change the dmc opp table for bob
cfc3a5c27a78 CHROMIUM: arm64: dts: rockchip: add the rev2 support for Bob board
090be553b01e CHROMIUM: arm64: dts: rockchip: add bob dts

I'm not familiar with kernel development but I anyway tried to naively rebase those patches on top of upstream/master with no success so far as the device (Asus C101PA) still displays a black screen.