linux-kernel - Re: [PATCH v2 1/2] phy/qualcomm: add hbr3_hbr2 voltage and premphasis swing table

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Message-ID: <YE8yyK7l9qQKuF3V@vkoul-mobl>
Date:   Mon, 15 Mar 2021 15:41:20 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Kuogee Hsieh <khsieh@...eaurora.org>
Cc:     robdclark@...il.com, sean@...rly.run, swboyd@...omium.org,
        agross@...nel.org, bjorn.andersson@...aro.org,
        tanmay@...eaurora.org, abhinavk@...eaurora.org,
        aravindh@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] phy/qualcomm: add hbr3_hbr2 voltage and
 premphasis swing table

On 18-02-21, 08:51, Kuogee Hsieh wrote:
> Add hbr3_hbr2 voltage and premphasis swing table to support
> HBR3 link rate.

Please use phy: qcom-qmp: "...." for the patch title

> 
> Changes in V2:
> -- replaced upper case with lower case at hbr3_hbr2 table
> 
> Signed-off-by: Kuogee Hsieh <khsieh@...eaurora.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp.c | 23 +++++++++++++++++++++--
>  1 file changed, 21 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> index 0939a9e..4dcc074 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> @@ -2965,6 +2965,20 @@ static void qcom_qmp_phy_dp_aux_init(struct qmp_phy *qphy)
>  	       qphy->pcs + QSERDES_V3_DP_PHY_AUX_INTERRUPT_MASK);
>  }
>  
> +static const u8 qmp_dp_v3_pre_emphasis_hbr3_hbr2[4][4] = {
> +        { 0x00, 0x0c, 0x15, 0x1a },
> +        { 0x02, 0x0e, 0x16, 0xff },
> +        { 0x02, 0x11, 0xff, 0xff },
> +        { 0x04, 0xff, 0xff, 0xff }

This should use tabs and not spaces, please fix this and resend the
patch after running checkpatch --strict and adding Steve's acks

> +};
> +
> +static const u8 qmp_dp_v3_voltage_swing_hbr3_hbr2[4][4] = {
> +        { 0x02, 0x12, 0x16, 0x1a },
> +        { 0x09, 0x19, 0x1f, 0xff },
> +        { 0x10, 0x1f, 0xff, 0xff },
> +        { 0x1f, 0xff, 0xff, 0xff }
> +};
> +
>  static const u8 qmp_dp_v3_pre_emphasis_hbr_rbr[4][4] = {
>  	{ 0x00, 0x0c, 0x14, 0x19 },
>  	{ 0x00, 0x0b, 0x12, 0xff },
> @@ -3000,8 +3014,13 @@ static void qcom_qmp_phy_configure_dp_tx(struct qmp_phy *qphy)
>  		drvr_en = 0x10;
>  	}
>  
> -	voltage_swing_cfg = qmp_dp_v3_voltage_swing_hbr_rbr[v_level][p_level];
> -	pre_emphasis_cfg = qmp_dp_v3_pre_emphasis_hbr_rbr[v_level][p_level];
> +	if (dp_opts->link_rate <= 2700) {
> +		voltage_swing_cfg = qmp_dp_v3_voltage_swing_hbr_rbr[v_level][p_level];
> +		pre_emphasis_cfg = qmp_dp_v3_pre_emphasis_hbr_rbr[v_level][p_level];
> +	} else {
> +		voltage_swing_cfg = qmp_dp_v3_voltage_swing_hbr3_hbr2[v_level][p_level];
> +		pre_emphasis_cfg = qmp_dp_v3_pre_emphasis_hbr3_hbr2[v_level][p_level];
> +	}
>  
>  	/* TODO: Move check to config check */
>  	if (voltage_swing_cfg == 0xFF && pre_emphasis_cfg == 0xFF)
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project

-- 
~Vinod