Message-ID: <ce9e7b04-7030-a34a-eadf-56a914dcaaf1@intel.com>
Date:   Fri, 3 Mar 2023 10:36:57 +0200
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From:   Adrian Hunter <adrian.hunter@intel.com>
Subject: Re: [PATCH v3 6/6] mmc: sdhci-cadence: Add debug option for
 sdhci-cadence driver
To:     Piyush Malgujar <pmalgujar@marvell.com>, linux-mmc@vger.kernel.org,
        linux-kernel@vger.kernel.org, ulf.hansson@linaro.org,
        robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
        yamada.masahiro@socionext.com, devicetree@vger.kernel.org
Cc:     jannadurai@marvell.com, cchavva@marvell.com
References: <20230227183151.27912-1-pmalgujar@marvell.com>
 <20230227183151.27912-7-pmalgujar@marvell.com>
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Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki,
 Business Identity Code: 0357606 - 4, Domiciled in Helsinki
In-Reply-To: <20230227183151.27912-7-pmalgujar@marvell.com>
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On 27/02/23 20:31, Piyush Malgujar wrote:
> From: Jayanthi Annadurai <jannadurai@marvell.com>
> 
> Use Kernel config CONFIG_MMC_DEBUG to support dumping PHY and host
> controller register configuration for debug.
> 
> Signed-off-by: Jayanthi Annadurai <jannadurai@marvell.com>
> Signed-off-by: Piyush Malgujar <pmalgujar@marvell.com>
> ---
>  drivers/mmc/host/sdhci-cadence.c | 154 +++++++++++++++++++++++++++++++
>  1 file changed, 154 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
> index badff2df70b904779c70775b02b40086780b118d..c448a100f32c8c44a0da7c71c2aa5d25ac5a4b44 100644
> --- a/drivers/mmc/host/sdhci-cadence.c
> +++ b/drivers/mmc/host/sdhci-cadence.c
> @@ -115,6 +115,10 @@
>  #define	SDHCI_CDNS_SD6_PHY_DLL_SLAVE_CLK_WR_DELAY		GENMASK(15, 8)
>  #define	SDHCI_CDNS_SD6_PHY_DLL_SLAVE_READ_DQS_DELAY		GENMASK(7, 0)
>  
> +#define SDHCI_CDNS_SD6_PHY_DLL_OBS_REG0				0x201C
> +#define SDHCI_CDNS_SD6_PHY_DLL_OBS_REG1				0x2020
> +#define SDHCI_CDNS_SD6_PHY_DLL_OBS_REG2				0x2024
> +
>  #define SDHCI_CDNS_SD6_PHY_CTRL					0x2080
>  #define	SDHCI_CDNS_SD6_PHY_CTRL_PHONY_DQS_TIMING		GENMASK(9, 4)
>  
> @@ -968,6 +972,154 @@ static void sdhci_cdns_sd6_calc_phy(struct sdhci_cdns_sd6_phy *phy)
>  	}
>  }
>  
> +#ifdef CONFIG_MMC_DEBUG

At this point this might as well be instead:

#if defined(DEBUG) || IS_ENABLED(CONFIG_DYNAMIC_DEBUG)

> +
> +static
> +void sdhci_cdns_sd6_phy_dump(struct sdhci_cdns_sd6_phy *phy,
> +			     struct sdhci_host *host)
> +{
> +	dev_dbg(mmc_dev(host->mmc), "PHY Timings\n");
> +	dev_dbg(mmc_dev(host->mmc), "mode %d t_sdclk %d\n", phy->mode,
> +		phy->t_sdclk);
> +
> +	dev_dbg(mmc_dev(host->mmc), "cp_clk_wr_delay %d\n",
> +		phy->settings.cp_clk_wr_delay);
> +	dev_dbg(mmc_dev(host->mmc), "cp_clk_wrdqs_delay %d\n",
> +		phy->settings.cp_clk_wrdqs_delay);
> +	dev_dbg(mmc_dev(host->mmc), "cp_data_select_oe_end %d\n",
> +		phy->settings.cp_data_select_oe_end);
> +	dev_dbg(mmc_dev(host->mmc), "cp_dll_bypass_mode %d\n",
> +		phy->settings.cp_dll_bypass_mode);
> +	dev_dbg(mmc_dev(host->mmc), "cp_dll_locked_mode %d\n",
> +		phy->settings.cp_dll_locked_mode);
> +	dev_dbg(mmc_dev(host->mmc), "cp_dll_start_point %d\n",
> +		phy->settings.cp_dll_start_point);
> +	dev_dbg(mmc_dev(host->mmc), "cp_io_mask_always_on %d\n",
> +		phy->settings.cp_io_mask_always_on);
> +	dev_dbg(mmc_dev(host->mmc), "cp_io_mask_end %d\n",
> +		phy->settings.cp_io_mask_end);
> +	dev_dbg(mmc_dev(host->mmc), "cp_io_mask_start %d\n",
> +		phy->settings.cp_io_mask_start);
> +	dev_dbg(mmc_dev(host->mmc), "cp_rd_del_sel %d\n",
> +		phy->settings.cp_rd_del_sel);
> +	dev_dbg(mmc_dev(host->mmc), "cp_read_dqs_cmd_delay %d\n",
> +		phy->settings.cp_read_dqs_cmd_delay);
> +	dev_dbg(mmc_dev(host->mmc), "cp_read_dqs_delay %d\n",
> +		phy->settings.cp_read_dqs_delay);
> +	dev_dbg(mmc_dev(host->mmc), "cp_sw_half_cycle_shift %d\n",
> +		phy->settings.cp_sw_half_cycle_shift);
> +	dev_dbg(mmc_dev(host->mmc), "cp_sync_method %d\n",
> +		phy->settings.cp_sync_method);
> +	dev_dbg(mmc_dev(host->mmc), "cp_use_ext_lpbk_dqs %d\n",
> +		phy->settings.cp_use_ext_lpbk_dqs);
> +	dev_dbg(mmc_dev(host->mmc), "cp_use_lpbk_dqs %d\n",
> +		phy->settings.cp_use_lpbk_dqs);
> +	dev_dbg(mmc_dev(host->mmc), "cp_use_phony_dqs %d\n",
> +		phy->settings.cp_use_phony_dqs);
> +	dev_dbg(mmc_dev(host->mmc), "cp_use_phony_dqs_cmd %d\n",
> +		phy->settings.cp_use_phony_dqs_cmd);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_extended_rd_mode %d\n",
> +		phy->settings.sdhc_extended_rd_mode);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_extended_wr_mode %d\n",
> +		phy->settings.sdhc_extended_wr_mode);
> +
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_hcsdclkadj %d\n",
> +		phy->settings.sdhc_hcsdclkadj);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_idelay_val %d\n",
> +		phy->settings.sdhc_idelay_val);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_rdcmd_en %d\n",
> +		phy->settings.sdhc_rdcmd_en);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_rddata_en %d\n",
> +		phy->settings.sdhc_rddata_en);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_rw_compensate %d\n",
> +		phy->settings.sdhc_rw_compensate);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_sdcfsh %d\n",
> +		phy->settings.sdhc_sdcfsh);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_sdcfsl %d\n",
> +		phy->settings.sdhc_sdcfsl);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_wrcmd0_dly %d %d\n",
> +		phy->settings.sdhc_wrcmd0_dly,
> +		phy->settings.sdhc_wrcmd0_sdclk_dly);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_wrcmd1_dly %d %d\n",
> +		phy->settings.sdhc_wrcmd1_dly,
> +		phy->settings.sdhc_wrcmd1_sdclk_dly);
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_wrdata0_dly %d %d\n",
> +		phy->settings.sdhc_wrdata0_dly,
> +		phy->settings.sdhc_wrdata0_sdclk_dly);
> +
> +	dev_dbg(mmc_dev(host->mmc), "sdhc_wrdata1_dly %d %d\n",
> +		phy->settings.sdhc_wrdata1_dly,
> +		phy->settings.sdhc_wrdata1_sdclk_dly);
> +	dev_dbg(mmc_dev(host->mmc), "hs200_tune_val %d\n",
> +		phy->settings.hs200_tune_val);
> +}
> +
> +static
> +void sdhci_cdns_sd6_dump(struct sdhci_cdns_priv *priv, struct sdhci_host *host)
> +{
> +	struct sdhci_cdns_sd6_phy *phy = priv->phy;
> +	int id;
> +
> +	sdhci_cdns_sd6_phy_dump(phy);
> +
> +	dev_dbg(mmc_dev(host->mmc), "Host controller Register Dump\n");
> +	for (id = 0; id < 14; id++) {
> +		dev_dbg(mmc_dev(host->mmc), "HRS%d 0x%x\n", id,
> +			readl(priv->hrs_addr + (id * 4)));
> +	}
> +
> +	id = 29;
> +	dev_dbg(mmc_dev(host->mmc), "HRS%d 0x%x\n", id,
> +		readl(priv->hrs_addr + (id * 4)));
> +	id = 30;
> +	dev_dbg(mmc_dev(host->mmc), "HRS%d 0x%x\n", id,
> +		readl(priv->hrs_addr + (id * 4)));
> +
> +	for (id = 0; id < 27; id++) {
> +		dev_dbg(mmc_dev(host->mmc), "SRS%d 0x%x\n", id,
> +			readl(priv->hrs_addr + 0x200 + (id * 4)));
> +	}
> +
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_DQS_TIMING 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_DQS_TIMING));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_GATE_LPBK 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_GATE_LPBK));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_DLL_MASTER 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_DLL_MASTER));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_DLL_SLAVE 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_DLL_SLAVE));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_CTRL 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_CTRL));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_GPIO_CTRL0 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_GPIO_CTRL0));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_DQ_TIMING 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_DQ_TIMING));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_DLL_OBS_REG0 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_DLL_OBS_REG0));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_DLL_OBS_REG1 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_DLL_OBS_REG1));
> +	dev_dbg(mmc_dev(host->mmc), "SDHCI_CDNS_SD6_PHY_DLL_OBS_REG2 0x%x\n",
> +		sdhci_cdns_sd6_read_phy_reg(priv,
> +					    SDHCI_CDNS_SD6_PHY_DLL_OBS_REG2));
> +}
> +
> +#else
> +
> +static inline void sdhci_cdns_sd6_dump(struct sdhci_cdns_priv *priv,
> +				       struct sdhci_host *host)
> +{
> +}
> +
> +#endif
> +
>  static
>  int sdhci_cdns_sd6_get_delay_params(struct device *dev,
>  				    struct sdhci_cdns_priv *priv)
> @@ -1319,6 +1471,8 @@ static void sdhci_cdns_sd6_set_clock(struct sdhci_host *host,
>  		pr_debug("%s: phy init failed\n", __func__);
>  
>  	sdhci_set_clock(host, clock);
> +
> +	sdhci_cdns_sd6_dump(priv, host);
>  }
>  
>  static int sdhci_cdns_sd4_phy_probe(struct platform_device *pdev,