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]). [1] https://lore.kernel.org/linux-arm-msm/[email protected]/ > > Signed-off-by: Petr Hodina <[email protected]> > Signed-off-by: David Heidelberg <[email protected]> > --- > arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-tianma.dts | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-tianma.dts > b/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-tianma.dts > index b58964cde8342..d1c7bccaab500 100644 > --- a/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-tianma.dts > +++ b/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-tianma.dts > @@ -36,3 +36,13 @@ touchscreen@1 { > touchscreen-size-y = <2246>; > }; > }; > + > +&dispcc { > + /* Disable for now so simple-framebuffer continues working */ > + status = "disabled"; > +}; > + > +&mdss { > + /* Disable for now so simple-framebuffer continues working */ > + status = "disabled"; > +}; > > -- > 2.53.0 > > -- With best wishes Dmitry
