[PATCH v2 3/3] arm64: dts: qcom: Add missing TCSR refclk to the DP PHYs

[Abel Vesa]

On 25-09-04 10:40:36, Konrad Dybcio wrote:
> On 9/3/25 2:37 PM, Abel Vesa wrote:
> > The DP PHYs on X1E80100 need the refclk which is provided
> > by the TCSR CC. So add it to the PHYs.
> > 
> > Cc: stable at vger.kernel.org # v6.9
> 
> You want to backport this to 6.9, but you also want to backport
> the driver patch to 6.10, "meh"
> 
> I'm not sure it makes sense to backport functionally, as this would
> only exhibit issues if:
> 
> a) the UEFI did no work to enable the refclk
> or:
> b) unused cleanup would happen
> 
> but the board would not survive booting with b) in v6.9, at least
> it wouldn't have display  - see Commit b60521eff227 ("clk: qcom:
> gcc-x1e80100: Unregister GCC_GPU_CFG_AHB_CLK/GCC_DISP_XO_CLK")
> 
> and a) is not something we'd hit on any of the upstream-supported
> targets

You are correct.

However, HW-wise, this clock is there and is needed, regardless
if UEFI leaves it enabled or not. So it makes sense to go all the way
back to 6.9 and fix it.