linux-kernel - Re: [PATCH] clk: qcom: Drop mmcx gdsc supply for dispcc and videocc

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Message-ID: <YtOOYryxh9oEJXyg@builder.lan>
Date:   Sat, 16 Jul 2022 23:21:54 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Abel Vesa <abel.vesa@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] clk: qcom: Drop mmcx gdsc supply for dispcc and videocc

On Wed 13 Jul 09:32 CDT 2022, Abel Vesa wrote:

> Both dispcc and videocc use mmcx power domain now.
> Lets drop the supply mmcx from every gdsc.
> 
> Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Fixes: 266e5cf39a0f ("arm64: dts: qcom: sm8250: remove mmcx regulator")
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>

This would break backwards compatibility with dtbs that used
mmcx-supply. We only ever used mmcx-supply in sm8250.dtsi upstream and
given that we only boot sm8250 off Android boot images it's unlikely
that anyone would use a new kernel with that old of a dtb...

So:
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Dmitry, what do you think?

Regards,
Bjorn

> ---
>  drivers/clk/qcom/dispcc-sm8250.c  | 1 -
>  drivers/clk/qcom/videocc-sm8250.c | 4 ----
>  2 files changed, 5 deletions(-)
> 
> diff --git a/drivers/clk/qcom/dispcc-sm8250.c b/drivers/clk/qcom/dispcc-sm8250.c
> index 39b344ebb049..709076f0f9d7 100644
> --- a/drivers/clk/qcom/dispcc-sm8250.c
> +++ b/drivers/clk/qcom/dispcc-sm8250.c
> @@ -1138,7 +1138,6 @@ static struct gdsc mdss_gdsc = {
>  	},
>  	.pwrsts = PWRSTS_OFF_ON,
>  	.flags = HW_CTRL,
> -	.supply = "mmcx",
>  };
>  
>  static struct clk_regmap *disp_cc_sm8250_clocks[] = {
> diff --git a/drivers/clk/qcom/videocc-sm8250.c b/drivers/clk/qcom/videocc-sm8250.c
> index 8617454e4a77..f28f2cb051d7 100644
> --- a/drivers/clk/qcom/videocc-sm8250.c
> +++ b/drivers/clk/qcom/videocc-sm8250.c
> @@ -277,7 +277,6 @@ static struct gdsc mvs0c_gdsc = {
>  	},
>  	.flags = 0,
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.supply = "mmcx",
>  };
>  
>  static struct gdsc mvs1c_gdsc = {
> @@ -287,7 +286,6 @@ static struct gdsc mvs1c_gdsc = {
>  	},
>  	.flags = 0,
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.supply = "mmcx",
>  };
>  
>  static struct gdsc mvs0_gdsc = {
> @@ -297,7 +295,6 @@ static struct gdsc mvs0_gdsc = {
>  	},
>  	.flags = HW_CTRL,
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.supply = "mmcx",
>  };
>  
>  static struct gdsc mvs1_gdsc = {
> @@ -307,7 +304,6 @@ static struct gdsc mvs1_gdsc = {
>  	},
>  	.flags = HW_CTRL,
>  	.pwrsts = PWRSTS_OFF_ON,
> -	.supply = "mmcx",
>  };
>  
>  static struct clk_regmap *video_cc_sm8250_clocks[] = {
> -- 
> 2.34.3
>