On 24/06/2024 07:18, Dmitry Baryshkov wrote:
On Mon, Jun 24, 2024 at 03:30:24AM GMT, Caleb Connolly wrote:
Add bindings for the SM8250 OnePlus devices, a common devicetree,
touchscreen and display drivers, and a dts for the OnePlus 8T (kebab).
The OnePlus 8 series is made up of 3 flagship smartphones from 2019,
featuring the Qualcomm X55 5G PCIe modem.
This series introduces initial support for the 8T, adding drivers for
the 1080x2400 120Hz DSC panel and the Synaptics TCM Oncell touchscreen.
The panel driver suffers from similar limitations to the LG SW43408
panel found on the Pixel 3, namely that after toggling the reset GPIO it
is not possible to get the panel into a working state.
Just to point it out: this is no longer true for SW43408. The panel
wakes up and works after toggling the reset. It seems, there is an issue
with one of the regulators, but not with the reset and/or panel startup.
Hmm ok, I've heard mixed reports then, I should try it out myself again.
I'll update the cover letter to reflect this. Thanks.
Given the apparent prevelance of this issue, particularly with DSC
panels, I believe this is a bug in the core DSI code, and not a device
or panel specific issue. I think it is still useful to accept these
panel drivers into upstream since, from a users perspective, the panel
is fully functional just by leaving the reset GPIO alone and keeping the
regulator on. The only (theoretical) downside is worse battery life,
which is a small price to pay for a working display.
