linux-kernel - Re: [PATCH 1/3] clk: qcom: dispcc-qcm2290: Fix BI_TCXO

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Date:   Thu, 13 Apr 2023 20:23:02 -0700
From:   Bjorn Andersson <andersson@...nel.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Loic Poulain <loic.poulain@...aro.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] clk: qcom: dispcc-qcm2290: Fix BI_TCXO_AO handling

On Wed, Apr 12, 2023 at 04:53:05PM +0200, Konrad Dybcio wrote:
> BI_TCXO_AO was previously shoved in under the name of its non-AO
> sibling in parent_map_2. Resolve it.
> 
> Fixes: cc517ea3333f ("clk: qcom: Add display clock controller driver for QCM2290")
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  drivers/clk/qcom/dispcc-qcm2290.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/clk/qcom/dispcc-qcm2290.c b/drivers/clk/qcom/dispcc-qcm2290.c
> index cbb5f1ec6a54..0f516c72e624 100644
> --- a/drivers/clk/qcom/dispcc-qcm2290.c
> +++ b/drivers/clk/qcom/dispcc-qcm2290.c
> @@ -24,6 +24,7 @@
>  
>  enum {
>  	P_BI_TCXO,
> +	P_BI_TCXO_AO,
>  	P_DISP_CC_PLL0_OUT_MAIN,
>  	P_DSI0_PHY_PLL_OUT_BYTECLK,
>  	P_DSI0_PHY_PLL_OUT_DSICLK,
> @@ -83,7 +84,7 @@ static const struct clk_parent_data disp_cc_parent_data_1[] = {
>  };
>  
>  static const struct parent_map disp_cc_parent_map_2[] = {
> -	{ P_BI_TCXO, 0 },
> +	{ P_BI_TCXO_AO, 0 },

I think the commit message fails to explain why the parent clock for the
AHB clocks should be active-only. Are you sure, can you please
elaborate?

Thanks,
Bjorn

>  	{ P_GPLL0_OUT_MAIN, 4 },
>  };
>  
> @@ -154,7 +155,7 @@ static struct clk_regmap_div disp_cc_mdss_byte0_div_clk_src = {
>  };
>  
>  static const struct freq_tbl ftbl_disp_cc_mdss_ahb_clk_src[] = {
> -	F(19200000, P_BI_TCXO, 1, 0, 0),
> +	F(19200000, P_BI_TCXO_AO, 1, 0, 0),
>  	F(37500000, P_GPLL0_OUT_MAIN, 8, 0, 0),
>  	F(75000000, P_GPLL0_OUT_MAIN, 4, 0, 0),
>  	{ }
> 
> -- 
> 2.40.0
>