linux-kernel - Re: [PATCH 14/14] phy: qcom-qmp-combo: add support for updated sc8280xp binding

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Date:   Sat, 12 Nov 2022 14:36:23 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>,
        Vinod Koul <vkoul@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/14] phy: qcom-qmp-combo: add support for updated
 sc8280xp binding

On 11/11/2022 12:24, Johan Hovold wrote:
> Add support for the new SC8280XP binding.
> 
> Note that the binding does not try to describe every register subregion
> and instead the driver holds the corresponding offsets.
> 
> Also note that (possibly) unlike on earlier platforms, the TX registers
> are used by both the USB and DP implementation.
> 
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
>   drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 143 ++++++++++++++++++++--
>   1 file changed, 133 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> index 0a4d53e6c586..544a7e55bf14 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> @@ -798,9 +798,25 @@ static const u8 qmp_dp_v5_voltage_swing_hbr_rbr[4][4] = {
>   
>   struct qmp_combo;
>   
> +struct qmp_combo_offsets {
> +	u16 com;
> +	u16 txa;
> +	u16 rxa;
> +	u16 txb;
> +	u16 rxb;


Yes, txa/txb are more in spite of the vendor headers. I'd sill suggest 
to use tx/tx2 and rx/rx2 as used everywhere in the QMP driver.


> +	u16 usb3_serdes;
> +	u16 usb3_pcs_misc;
> +	u16 usb3_pcs;
> +	u16 usb3_pcs_usb;
> +	u16 dp_serdes;
> +	u16 dp_dp_phy;
> +};
> +
-- 
With best wishes
Dmitry