Re: [PATCH v2] clk: qcom: mmcc-sdm660: enable the parents of the pixel clock sources

[Dmitry Baryshkov]

On Fri, Oct 02, 2026 at 01:46:24PM -0300, Fabricio Akio via B4 Relay wrote:
> From: Fabricio Akio <fabricioakio@xxxxxxxxx>
> 
> pclk0_clk_src and pclk1_clk_src are fed by the DSI PHY PLLs, which
> dsi_pll_14nm_vco_set_rate() resets and only clk_prepare() restarts. The
> DSI host sets the link rates before it prepares the PLL, so the RCG is
> updated against a stopped source, and if it is enabled at that point
> the update times out:
> 
>   pclk0_clk_src: rcg didn't update its configuration.
> 
> Seen on a board whose simple-framebuffer node lists the pixel clock:
> the RCG then reads enabled at msm's first modeset.
> 
> Set CLK_OPS_PARENT_ENABLE on both so the core prepares the PLL around
> the rate change, as dispcc-sm8250 does for its pixel clock sources since
> commit acf7a91d0b0e ("clk: qcom: dispcc-sm8250: Enable parents for pixel
> clocks").
> 
> Fixes: 5db3ae8b33de ("clk: qcom: Add SDM660 Multimedia Clock Controller (MMCC) driver")
> Signed-off-by: Fabricio Akio <fabricioakio@xxxxxxxxx>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>


-- 
With best wishes
Dmitry