linux-kernel - Re: [PATCH v4 2/2] phy: qcom-qmp: Add SM8150 PCIe QMP PHYs

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Message-ID: <bad40b1b-73af-a1f3-d0df-b59e4a599015@linaro.org>
Date:   Wed, 13 Apr 2022 10:27:19 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        linux-phy@...ts.infradead.org
Cc:     bhupesh.linux@...il.com, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, vkoul@...nel.org,
        bjorn.andersson@...aro.org
Subject: Re: [PATCH v4 2/2] phy: qcom-qmp: Add SM8150 PCIe QMP PHYs

On 26/03/2022 01:21, Bhupesh Sharma wrote:
> SM8150 has multiple (different) PHY versions:
> QMP GEN3x1 PHY - 1 lane
> QMP GEN3x2 PHY - 2 lanes
> 
> Add support for these with relevant init sequence.
> 
> Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> Cc: Vinod Koul <vkoul@...nel.org>
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> ---
>   drivers/phy/qualcomm/phy-qcom-qmp.c | 90 +++++++++++++++++++++++++++++
>   1 file changed, 90 insertions(+)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> index b144ae1f729a..8e928b9619b6 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> @@ -3294,6 +3294,11 @@ static const char * const sdm845_pciephy_clk_l[] = {
>   	"aux", "cfg_ahb", "ref", "refgen",
>   };
>   
> +/* the pcie phy on sm8150 doesn't have a ref clock */
> +static const char * const sm8150_pciephy_clk_l[] = {
> +	"aux", "cfg_ahb", "refgen",

On sm8250 we use GCC_WIFI/WIGIG/MDM_CLKREF_EN clocks as "ref". 
Downstream dts lists them as "pcie_X_ldo". sm8150 also has these clocks 
(GCC_PCIE_n_CLKREF_CLK). Is there any reason why we use CLKREF clocks on 
sm8250, but ommit them on sm8150?

> +};
> +
>   static const char * const qmp_v4_phy_clk_l[] = {
>   	"aux", "ref_clk_src", "ref", "com_aux",
>   };
> @@ -3583,6 +3588,85 @@ static const struct qmp_phy_cfg sdm845_qhp_pciephy_cfg = {
>   	.pwrdn_delay_max	= 1005,		/* us */
>   };
>   
> +static const struct qmp_phy_cfg sm8150_qmp_gen3x1_pciephy_cfg = {
> +	.type = PHY_TYPE_PCIE,
> +	.nlanes = 1,
> +
> +	.serdes_tbl		= sm8250_qmp_pcie_serdes_tbl,
> +	.serdes_tbl_num		= ARRAY_SIZE(sm8250_qmp_pcie_serdes_tbl),
> +	.serdes_tbl_sec		= sm8250_qmp_gen3x1_pcie_serdes_tbl,
> +	.serdes_tbl_num_sec	= ARRAY_SIZE(sm8250_qmp_gen3x1_pcie_serdes_tbl),
> +	.tx_tbl			= sm8250_qmp_pcie_tx_tbl,
> +	.tx_tbl_num		= ARRAY_SIZE(sm8250_qmp_pcie_tx_tbl),
> +	.rx_tbl			= sm8250_qmp_pcie_rx_tbl,
> +	.rx_tbl_num		= ARRAY_SIZE(sm8250_qmp_pcie_rx_tbl),
> +	.rx_tbl_sec		= sm8250_qmp_gen3x1_pcie_rx_tbl,
> +	.rx_tbl_num_sec		= ARRAY_SIZE(sm8250_qmp_gen3x1_pcie_rx_tbl),
> +	.pcs_tbl		= sm8250_qmp_pcie_pcs_tbl,
> +	.pcs_tbl_num		= ARRAY_SIZE(sm8250_qmp_pcie_pcs_tbl),
> +	.pcs_tbl_sec		= sm8250_qmp_gen3x1_pcie_pcs_tbl,
> +	.pcs_tbl_num_sec		= ARRAY_SIZE(sm8250_qmp_gen3x1_pcie_pcs_tbl),
> +	.pcs_misc_tbl		= sm8250_qmp_pcie_pcs_misc_tbl,
> +	.pcs_misc_tbl_num	= ARRAY_SIZE(sm8250_qmp_pcie_pcs_misc_tbl),
> +	.pcs_misc_tbl_sec		= sm8250_qmp_gen3x1_pcie_pcs_misc_tbl,
> +	.pcs_misc_tbl_num_sec	= ARRAY_SIZE(sm8250_qmp_gen3x1_pcie_pcs_misc_tbl),
> +	.clk_list		= sm8150_pciephy_clk_l,
> +	.num_clks		= ARRAY_SIZE(sm8150_pciephy_clk_l),
> +	.reset_list		= sdm845_pciephy_reset_l,
> +	.num_resets		= ARRAY_SIZE(sdm845_pciephy_reset_l),
> +	.vreg_list		= qmp_phy_vreg_l,
> +	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
> +	.regs			= sm8250_pcie_regs_layout,
> +
> +	.start_ctrl		= PCS_START | SERDES_START,
> +	.pwrdn_ctrl		= SW_PWRDN | REFCLK_DRV_DSBL,
> +	.phy_status		= PHYSTATUS,
> +
> +	.has_pwrdn_delay	= true,
> +	.pwrdn_delay_min	= 995,		/* us */
> +	.pwrdn_delay_max	= 1005,		/* us */
> +};
> +
> +static const struct qmp_phy_cfg sm8150_qmp_gen3x2_pciephy_cfg = {
> +	.type = PHY_TYPE_PCIE,
> +	.nlanes = 2,
> +
> +	.serdes_tbl		= sm8250_qmp_pcie_serdes_tbl,
> +	.serdes_tbl_num		= ARRAY_SIZE(sm8250_qmp_pcie_serdes_tbl),
> +	.tx_tbl			= sm8250_qmp_pcie_tx_tbl,
> +	.tx_tbl_num		= ARRAY_SIZE(sm8250_qmp_pcie_tx_tbl),
> +	.tx_tbl_sec		= sm8250_qmp_gen3x2_pcie_tx_tbl,
> +	.tx_tbl_num_sec		= ARRAY_SIZE(sm8250_qmp_gen3x2_pcie_tx_tbl),
> +	.rx_tbl			= sm8250_qmp_pcie_rx_tbl,
> +	.rx_tbl_num		= ARRAY_SIZE(sm8250_qmp_pcie_rx_tbl),
> +	.rx_tbl_sec		= sm8250_qmp_gen3x2_pcie_rx_tbl,
> +	.rx_tbl_num_sec		= ARRAY_SIZE(sm8250_qmp_gen3x2_pcie_rx_tbl),
> +	.pcs_tbl		= sm8250_qmp_pcie_pcs_tbl,
> +	.pcs_tbl_num		= ARRAY_SIZE(sm8250_qmp_pcie_pcs_tbl),
> +	.pcs_tbl_sec		= sm8250_qmp_gen3x2_pcie_pcs_tbl,
> +	.pcs_tbl_num_sec		= ARRAY_SIZE(sm8250_qmp_gen3x2_pcie_pcs_tbl),
> +	.pcs_misc_tbl		= sm8250_qmp_pcie_pcs_misc_tbl,
> +	.pcs_misc_tbl_num	= ARRAY_SIZE(sm8250_qmp_pcie_pcs_misc_tbl),
> +	.pcs_misc_tbl_sec		= sm8250_qmp_gen3x2_pcie_pcs_misc_tbl,
> +	.pcs_misc_tbl_num_sec	= ARRAY_SIZE(sm8250_qmp_gen3x2_pcie_pcs_misc_tbl),
> +	.clk_list		= sm8150_pciephy_clk_l,
> +	.num_clks		= ARRAY_SIZE(sm8150_pciephy_clk_l),
> +	.reset_list		= sdm845_pciephy_reset_l,
> +	.num_resets		= ARRAY_SIZE(sdm845_pciephy_reset_l),
> +	.vreg_list		= qmp_phy_vreg_l,
> +	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
> +	.regs			= sm8250_pcie_regs_layout,
> +
> +	.start_ctrl		= PCS_START | SERDES_START,
> +	.pwrdn_ctrl		= SW_PWRDN | REFCLK_DRV_DSBL,
> +	.phy_status		= PHYSTATUS,
> +
> +	.is_dual_lane_phy	= true,
> +	.has_pwrdn_delay	= true,
> +	.pwrdn_delay_min	= 995,		/* us */
> +	.pwrdn_delay_max	= 1005,		/* us */
> +};
> +
>   static const struct qmp_phy_cfg sm8250_qmp_gen3x1_pciephy_cfg = {
>   	.type = PHY_TYPE_PCIE,
>   	.nlanes = 1,
> @@ -6007,6 +6091,12 @@ static const struct of_device_id qcom_qmp_phy_of_match_table[] = {
>   	}, {
>   		.compatible = "qcom,sm6115-qmp-ufs-phy",
>   		.data = &sm6115_ufsphy_cfg,
> +	}, {
> +		.compatible = "qcom,sm8150-qmp-gen3x1-pcie-phy",
> +		.data = &sm8150_qmp_gen3x1_pciephy_cfg,
> +	}, {
> +		.compatible = "qcom,sm8150-qmp-gen3x2-pcie-phy",
> +		.data = &sm8150_qmp_gen3x2_pciephy_cfg,
>   	}, {
>   		.compatible = "qcom,sm8150-qmp-ufs-phy",
>   		.data = &sm8150_ufsphy_cfg,


-- 
With best wishes
Dmitry