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Message-ID: <9098554e-5327-0b7f-f4d0-a81880556136@linaro.org>
Date:   Tue, 2 Aug 2022 10:15:27 +0300
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Subject: Re: [PATCH 3/5] clk: qcom: gpucc-sc7280: Add cx collapse reset
 support
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To:     Akhil P Oommen <quic_akhilpo@quicinc.com>,
        freedreno <freedreno@lists.freedesktop.org>,
        dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
        Rob Clark <robdclark@gmail.com>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Stephen Boyd <swboyd@chromium.org>
Cc:     Douglas Anderson <dianders@chromium.org>,
        Andy Gross <agross@kernel.org>,
        Konrad Dybcio <konrad.dybcio@somainline.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>, linux-clk@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <1659172664-10345-1-git-send-email-quic_akhilpo@quicinc.com>
 <20220730144713.3.I5e64ff4b77bb9079eb2edeea8a02585c9e76778f@changeid>
From:   Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
In-Reply-To: <20220730144713.3.I5e64ff4b77bb9079eb2edeea8a02585c9e76778f@changeid>
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On 30/07/2022 12:17, Akhil P Oommen wrote:
> Allow a consumer driver to poll for cx gdsc collapse through Reset
> framework.
> 
> Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
> ---
> 
>   drivers/clk/qcom/gpucc-sc7280.c | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/clk/qcom/gpucc-sc7280.c b/drivers/clk/qcom/gpucc-sc7280.c
> index 9a832f2..f5df51d 100644
> --- a/drivers/clk/qcom/gpucc-sc7280.c
> +++ b/drivers/clk/qcom/gpucc-sc7280.c
> @@ -433,12 +433,18 @@ static const struct regmap_config gpu_cc_sc7280_regmap_config = {
>   	.fast_io = true,
>   };
>   
> +static const struct qcom_reset_map gpucc_sc7280_resets[] = {
> +	[GPU_CX_COLLAPSE] = { .op = gdsc_wait_for_collapse, .priv = &cx_gdsc },
> +};
> +
>   static const struct qcom_cc_desc gpu_cc_sc7280_desc = {
>   	.config = &gpu_cc_sc7280_regmap_config,
>   	.clks = gpu_cc_sc7280_clocks,
>   	.num_clks = ARRAY_SIZE(gpu_cc_sc7280_clocks),
>   	.gdscs = gpu_cc_sc7180_gdscs,
>   	.num_gdscs = ARRAY_SIZE(gpu_cc_sc7180_gdscs),
> +	.resets = gpucc_sc7280_resets,
> +	.num_resets = ARRAY_SIZE(gpucc_sc7280_resets),

An implementation question. Do we have to poll for the GDSC on platforms 
like sm8150/sm8250 which have the plain BCR resets?

>   };
>   
>   static const struct of_device_id gpu_cc_sc7280_match_table[] = {


-- 
With best wishes
Dmitry