Re: [PATCH v2 5/5] drivers: mmc: sdhci-cadence: Add debug option for sdhci-cadence driver.

From: Adrian Hunter
Date: Thu Feb 02 2023 - 13:45:55 EST

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On 23/01/23 21:27, Piyush Malgujar wrote:
> From: Jayanthi Annadurai <jannadurai@xxxxxxxxxxx>
>
> Use Kernel config CONFIG_MMC_DEBUG to support dumping PHY and host
> controller register configuration for debug.
>
> Signed-off-by: Jayanthi Annadurai <jannadurai@xxxxxxxxxxx>
> Signed-off-by: Piyush Malgujar <pmalgujar@xxxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-cadence.c | 104 +++++++++++++++++++++++++++++++
> 1 file changed, 104 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
> index baee0f98deac975ab92cf3e09a1edec5d3a59021..9aad7468ee9b7fe2755f343ac7ab1f5da8c63947 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)
>
> @@ -969,6 +973,104 @@ static void sdhci_cdns_sd6_calc_phy(struct sdhci_cdns_sd6_phy *phy)
> }
> }
>
> +#ifdef CONFIG_MMC_DEBUG

So why not just use dev_dbg?

> +
> +#define DEBUG_DRV pr_info

DEBUG_DRV is not needed

> +
> +static void sdhci_cdns_sd6_phy_dump(struct sdhci_cdns_sd6_phy *phy)
> +{
> + DEBUG_DRV("PHY Timings\n");
> + DEBUG_DRV("mode %d t_sdclk %d\n", phy->mode, phy->t_sdclk);
> +
> + DEBUG_DRV("cp_clk_wr_delay %d\n", phy->settings.cp_clk_wr_delay);
> + DEBUG_DRV("cp_clk_wrdqs_delay %d\n", phy->settings.cp_clk_wrdqs_delay);
> + DEBUG_DRV("cp_data_select_oe_end %d\n", phy->settings.cp_data_select_oe_end);
> + DEBUG_DRV("cp_dll_bypass_mode %d\n", phy->settings.cp_dll_bypass_mode);
> + DEBUG_DRV("cp_dll_locked_mode %d\n", phy->settings.cp_dll_locked_mode);
> + DEBUG_DRV("cp_dll_start_point %d\n", phy->settings.cp_dll_start_point);
> + DEBUG_DRV("cp_io_mask_always_on %d\n", phy->settings.cp_io_mask_always_on);
> + DEBUG_DRV("cp_io_mask_end %d\n", phy->settings.cp_io_mask_end);
> + DEBUG_DRV("cp_io_mask_start %d\n", phy->settings.cp_io_mask_start);
> + DEBUG_DRV("cp_rd_del_sel %d\n", phy->settings.cp_rd_del_sel);
> + DEBUG_DRV("cp_read_dqs_cmd_delay %d\n", phy->settings.cp_read_dqs_cmd_delay);
> + DEBUG_DRV("cp_read_dqs_delay %d\n", phy->settings.cp_read_dqs_delay);
> + DEBUG_DRV("cp_sw_half_cycle_shift %d\n", phy->settings.cp_sw_half_cycle_shift);
> + DEBUG_DRV("cp_sync_method %d\n", phy->settings.cp_sync_method);
> + DEBUG_DRV("cp_use_ext_lpbk_dqs %d\n", phy->settings.cp_use_ext_lpbk_dqs);
> + DEBUG_DRV("cp_use_lpbk_dqs %d\n", phy->settings.cp_use_lpbk_dqs);
> + DEBUG_DRV("cp_use_phony_dqs %d\n", phy->settings.cp_use_phony_dqs);
> + DEBUG_DRV("cp_use_phony_dqs_cmd %d\n", phy->settings.cp_use_phony_dqs_cmd);
> + DEBUG_DRV("sdhc_extended_rd_mode %d\n", phy->settings.sdhc_extended_rd_mode);
> + DEBUG_DRV("sdhc_extended_wr_mode %d\n", phy->settings.sdhc_extended_wr_mode);
> +
> + DEBUG_DRV("sdhc_hcsdclkadj %d\n", phy->settings.sdhc_hcsdclkadj);
> + DEBUG_DRV("sdhc_idelay_val %d\n", phy->settings.sdhc_idelay_val);
> + DEBUG_DRV("sdhc_rdcmd_en %d\n", phy->settings.sdhc_rdcmd_en);
> + DEBUG_DRV("sdhc_rddata_en %d\n", phy->settings.sdhc_rddata_en);
> + DEBUG_DRV("sdhc_rw_compensate %d\n", phy->settings.sdhc_rw_compensate);
> + DEBUG_DRV("sdhc_sdcfsh %d\n", phy->settings.sdhc_sdcfsh);
> + DEBUG_DRV("sdhc_sdcfsl %d\n", phy->settings.sdhc_sdcfsl);
> + DEBUG_DRV("sdhc_wrcmd0_dly %d %d\n",
> + phy->settings.sdhc_wrcmd0_dly, phy->settings.sdhc_wrcmd0_sdclk_dly);
> + DEBUG_DRV("sdhc_wrcmd1_dly %d %d\n",
> + phy->settings.sdhc_wrcmd1_dly, phy->settings.sdhc_wrcmd1_sdclk_dly);
> + DEBUG_DRV("sdhc_wrdata0_dly %d %d\n",
> + phy->settings.sdhc_wrdata0_dly, phy->settings.sdhc_wrdata0_sdclk_dly);
> +
> + DEBUG_DRV("sdhc_wrdata1_dly %d %d\n",
> + phy->settings.sdhc_wrdata1_dly, phy->settings.sdhc_wrdata1_sdclk_dly);
> + DEBUG_DRV("hs200_tune_val %d\n", phy->settings.hs200_tune_val);
> +}
> +
> +static void sdhci_cdns_sd6_dump(struct sdhci_cdns_priv *priv)
> +{
> + struct sdhci_cdns_sd6_phy *phy = priv->phy;
> + int id;
> +
> + sdhci_cdns_sd6_phy_dump(phy);
> +
> + DEBUG_DRV("Host controller Register Dump\n");
> + for (id = 0; id < 14; id++)
> + DEBUG_DRV("HRS%d 0x%x\n", id, readl(priv->hrs_addr + (id * 4)));
> +
> + id = 29;
> + DEBUG_DRV("HRS%d 0x%x\n", id, readl(priv->hrs_addr + (id * 4)));
> + id = 30;
> + DEBUG_DRV("HRS%d 0x%x\n", id, readl(priv->hrs_addr + (id * 4)));
> +
> + for (id = 0; id < 27; id++)
> + DEBUG_DRV("SRS%d 0x%x\n", id, readl(priv->hrs_addr + 0x200 + (id * 4)));
> +
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_DQS_TIMING 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_DQS_TIMING));
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_GATE_LPBK 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_GATE_LPBK));
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_DLL_MASTER 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_DLL_MASTER));
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_DLL_SLAVE 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_DLL_SLAVE));
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_CTRL 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_CTRL));
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_GPIO_CTRL0 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_GPIO_CTRL0));
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_DQ_TIMING 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_DQ_TIMING));
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_DLL_OBS_REG0 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_DLL_OBS_REG0));
> + DEBUG_DRV("SDHCI_CDNS_SD6_PHY_DLL_OBS_REG1 0x%x\n",
> + sdhci_cdns_sd6_read_phy_reg(priv, SDHCI_CDNS_SD6_PHY_DLL_OBS_REG1));
> + DEBUG_DRV("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)
> +{
> +}
> +
> +#endif
> +
> static int sdhci_cdns_sd6_get_delay_params(struct device *dev, struct sdhci_cdns_priv *priv)
> {
> struct sdhci_cdns_sd6_phy *phy = priv->phy;
> @@ -1373,6 +1475,8 @@ 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);
> }
>
> static int sdhci_cdns_sd4_phy_probe(struct platform_device *pdev,

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