Re: [PATCH v2] clk: qcom: dispcc-sdm845: Enable parents for pixel clocks

[Val Packett]

On 1/7/26 8:44 AM, Petr Hodina via B4 Relay wrote:
> From: Petr Hodina <petr.hodina@xxxxxxxxxxxxxx>
>
> Add CLK_OPS_PARENT_ENABLE to MDSS pixel clock sources to ensure parent
> clocks are enabled during clock operations, preventing potential
> stability issues during display configuration.
>
> Fixes: 81351776c9fb ("clk: qcom: Add display clock controller driver for SDM845")
> Signed-off-by: Petr Hodina <petr.hodina@xxxxxxxxxxxxxx>
> ---
> We are currently running the latest linux-next snapshots (next-202511*
> and next-202512*) and have encountered random freezes and crashes on the
> Pixel 3, as well as crash dumps on the OnePlus 6 and 6T.
>
> This commit fixes the stability issue. I've checked other SDM dispcc
> files and they also contain this configuration.

Hm, we don't have this flag set in dispcc-x1e80100.c either!

The only random freeze we have on that platform seems related to PCIe 
ASPM with NVMe drives, but during display configuration.. *extremely* 
rarely, but the eDP display output can get stuck on a blue screen. Many 
run with clk_ignore_unused for the early uefi framebuffer though.

~val