Re: [PATCH 3/9] arm64: dts: qcom: sc7280: Enable MDP turbo mode

From: Dmitry Baryshkov
Date: Thu Feb 22 2024 - 04:47:34 EST


On Thu, 22 Feb 2024 at 11:28, Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> wrote:
>
>
>
> On 2/22/24 10:04, Dmitry Baryshkov wrote:
> > On Thu, 22 Feb 2024 at 10:56, Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> wrote:
> >>
> >>
> >>
> >> On 2/22/24 00:41, Dmitry Baryshkov wrote:
> >>> On Thu, 22 Feb 2024 at 01:19, Bjorn Andersson <quic_bjorande@xxxxxxxxxxx> wrote:
> >>>>
> >>>> The max frequency listed in the DPU opp-table is 506MHz, this is not
> >>>> sufficient to drive a 4k@60 display, resulting in constant underrun.
> >>>>
> >>>> Add the missing MDP_CLK turbo frequency of 608MHz to the opp-table to
> >>>> fix this.
> >>>
> >>> I think we might want to keep this disabled for ChromeOS devices. Doug?
> >>
> >> ChromeOS devices don't get a special SoC
> >
> > But they have the sc7280-chrome-common.dtsi, which might contain a
> > corresponding /delete-node/ .
>
> What does that change? The clock rates are bound to the
> SoC and the effective values are limited by link-frequencies
> or the panel driver.

Preventing the DPU from overheating? Or spending too much power?

--
With best wishes
Dmitry