On 12/04/2026 02:36, Dmitry Baryshkov wrote:
On Fri, Apr 10, 2026 at 03:51:12PM +0200, David Heidelberg wrote:
On 18/03/2026 15:47, Dmitry Baryshkov wrote:
On Tue, Mar 17, 2026 at 11:12:35PM +0100, David Heidelberg via B4 Relay wrote:
From: Petr Hodina <[email protected]>
Currently the panel driver for tianma is broken.
Disable MDSS to prevent DRM taking over the framebuffer.
I'd still hope that somebody can get it to work. I'd start by using
prepare_prev_first. Sumit reported the panel as working in 2020 and I
have no doubts that it was the case. Another option migt be something
related to the dispcc (see my [1]).
Sadly, the prepare_prev_first didn't solve the issue. The framebuffer ->
MDSS takover happens, but at greetd (login) loading screen goes black and
never restores.
Will need more work.
Do you see a console _while_ it boots, after the handover? I'd check the
mode programming. Maybe, disabling panel reset would also (temporarily)
help.
When I get access to the phone for longer period of time I'll try to debug it
step by step. This time I had only time to flash kernel and test if it boots
with prepare_prev_first.
David
David>
[1]
https://lore.kernel.org/linux-arm-msm/[email protected]/
--
David Heidelberg
