Re: [PATCH 08/14] phy: cadence-torrent: Add PHY configuration for DP with 100MHz ref clock

From: Kishon Vijay Abraham I
Date: Thu May 13 2021 - 02:59:44 EST

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On 09/04/21 11:04 am, Swapnil Jakhade wrote:
> Add PHY configuration registers for DP with 100MHz ref clock and NO_SSC.

Looks neat! Thanks!

>
> Signed-off-by: Swapnil Jakhade <sjakhade@xxxxxxxxxxx>
> ---
> drivers/phy/cadence/phy-cadence-torrent.c | 162 ++++++++++++++++++++++
> 1 file changed, 162 insertions(+)
>
> diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
> index a6331927d775..69466481af26 100644
> --- a/drivers/phy/cadence/phy-cadence-torrent.c
> +++ b/drivers/phy/cadence/phy-cadence-torrent.c
> @@ -103,6 +103,7 @@
> #define CMN_PLL0_FRACDIVH_M0 0x0092U
> #define CMN_PLL0_HIGH_THR_M0 0x0093U
> #define CMN_PLL0_DSM_DIAG_M0 0x0094U
> +#define CMN_PLL0_DSM_FBH_OVRD_M0 0x0095U
> #define CMN_PLL0_SS_CTRL1_M0 0x0098U
> #define CMN_PLL0_SS_CTRL2_M0 0x0099U
> #define CMN_PLL0_SS_CTRL3_M0 0x009AU
> @@ -816,6 +817,89 @@ void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy,
> cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_START, 0x00C7);
> }
>
> +static
> +void cdns_torrent_dp_pma_cmn_vco_cfg_100mhz(struct cdns_torrent_phy *cdns_phy,
> + u32 rate, bool ssc)
> +{
> + struct regmap *regmap = cdns_phy->regmap_common_cdb;
> +
> + /* Assumes 100 MHz refclock */
> + switch (rate) {
> + /* Setting VCO for 10.8GHz */
> + case 2700:
> + case 5400:
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0028);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_DSM_FBH_OVRD_M0, 0x0022);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_FBH_OVRD_M0, 0x0022);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_FBL_OVRD_M0, 0x000C);
> + break;
> + /* Setting VCO for 9.72GHz */
> + case 1620:
> + case 2430:
> + case 3240:
> + cdns_torrent_phy_write(regmap, CMN_PLL0_DSM_DIAG_M0, 0x0004);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_DIAG_M0, 0x0004);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0061);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0061);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x3333);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x3333);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x0042);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x0042);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
> + break;
> + /* Setting VCO for 8.64GHz */
> + case 2160:
> + case 4320:
> + cdns_torrent_phy_write(regmap, CMN_PLL0_DSM_DIAG_M0, 0x0004);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_DIAG_M0, 0x0004);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0056);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0056);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x6666);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x6666);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x003A);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x003A);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
> + break;
> + /* Setting VCO for 8.1GHz */
> + case 8100:
> + cdns_torrent_phy_write(regmap, CMN_PLL0_DSM_DIAG_M0, 0x0004);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_DIAG_M0, 0x0004);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0051);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0051);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x0036);
> + cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x0036);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
> + cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0002);

We could think of having DP specific separate arrays for the above
configurations. Might help us to avoid having separate functions for
each of the required frequencies.

Thanks
Kishon

> + break;
> + }
> +}
> +
> /*
> * Enable or disable PLL for selected lanes.
> */
> @@ -1056,6 +1140,10 @@ static int cdns_torrent_dp_configure_rate(struct cdns_torrent_phy *cdns_phy,
> else if (cdns_phy->ref_clk_rate == CLK_25_MHZ)
> /* PMA common configuration 25MHz */
> cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(cdns_phy, dp->link_rate, dp->ssc);
> + else if (cdns_phy->ref_clk_rate == CLK_100_MHZ)
> + /* PMA common configuration 100MHz */
> + cdns_torrent_dp_pma_cmn_vco_cfg_100mhz(cdns_phy, dp->link_rate, dp->ssc);
> +
> cdns_torrent_dp_pma_cmn_rate(cdns_phy, dp->link_rate, dp->lanes);
>
> /* Enable the cmn_pll0_en. */
> @@ -1395,6 +1483,7 @@ static int cdns_torrent_dp_init(struct phy *phy)
> switch (cdns_phy->ref_clk_rate) {
> case CLK_19_2_MHZ:
> case CLK_25_MHZ:
> + case CLK_100_MHZ:
> /* Valid Ref Clock Rate */
> break;
> default:
> @@ -1431,6 +1520,11 @@ static int cdns_torrent_dp_init(struct phy *phy)
> cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(cdns_phy,
> cdns_phy->max_bit_rate,
> false);
> + else if (cdns_phy->ref_clk_rate == CLK_100_MHZ)
> + cdns_torrent_dp_pma_cmn_vco_cfg_100mhz(cdns_phy,
> + cdns_phy->max_bit_rate,
> + false);
> +
> cdns_torrent_dp_pma_cmn_rate(cdns_phy, cdns_phy->max_bit_rate,
> inst->num_lanes);
>
> @@ -2511,6 +2605,44 @@ static struct cdns_torrent_vals sl_dp_25_no_ssc_rx_ln_vals = {
> .num_regs = ARRAY_SIZE(sl_dp_25_no_ssc_rx_ln_regs),
> };
>
> +/* Single DP, 100 MHz Ref clk, no SSC */
> +static struct cdns_reg_pairs sl_dp_100_no_ssc_cmn_regs[] = {
> + {0x0003, CMN_PLL0_VCOCAL_TCTRL},
> + {0x0003, CMN_PLL1_VCOCAL_TCTRL}
> +};
> +
> +static struct cdns_reg_pairs sl_dp_100_no_ssc_tx_ln_regs[] = {
> + {0x00FB, TX_PSC_A0},
> + {0x04AA, TX_PSC_A2},
> + {0x04AA, TX_PSC_A3},
> + {0x000F, XCVR_DIAG_BIDI_CTRL}
> +};
> +
> +static struct cdns_reg_pairs sl_dp_100_no_ssc_rx_ln_regs[] = {
> + {0x0000, RX_PSC_A0},
> + {0x0000, RX_PSC_A2},
> + {0x0000, RX_PSC_A3},
> + {0x0000, RX_PSC_CAL},
> + {0x0000, RX_REE_GCSM1_CTRL},
> + {0x0000, RX_REE_GCSM2_CTRL},
> + {0x0000, RX_REE_PERGCSM_CTRL}
> +};
> +
> +static struct cdns_torrent_vals sl_dp_100_no_ssc_cmn_vals = {
> + .reg_pairs = sl_dp_100_no_ssc_cmn_regs,
> + .num_regs = ARRAY_SIZE(sl_dp_100_no_ssc_cmn_regs),
> +};
> +
> +static struct cdns_torrent_vals sl_dp_100_no_ssc_tx_ln_vals = {
> + .reg_pairs = sl_dp_100_no_ssc_tx_ln_regs,
> + .num_regs = ARRAY_SIZE(sl_dp_100_no_ssc_tx_ln_regs),
> +};
> +
> +static struct cdns_torrent_vals sl_dp_100_no_ssc_rx_ln_vals = {
> + .reg_pairs = sl_dp_100_no_ssc_rx_ln_regs,
> + .num_regs = ARRAY_SIZE(sl_dp_100_no_ssc_rx_ln_regs),
> +};
> +
> /* USB and SGMII/QSGMII link configuration */
> static struct cdns_reg_pairs usb_sgmii_link_cmn_regs[] = {
> {0x0002, PHY_PLL_CFG},
> @@ -3450,6 +3582,11 @@ static const struct cdns_torrent_data cdns_map_torrent = {
> },
> },
> [CLK_100_MHZ] = {
> + [TYPE_DP] = {
> + [TYPE_NONE] = {
> + [NO_SSC] = &sl_dp_100_no_ssc_cmn_vals,
> + },
> + },
> [TYPE_PCIE] = {
> [TYPE_NONE] = {
> [NO_SSC] = NULL,
> @@ -3542,6 +3679,11 @@ static const struct cdns_torrent_data cdns_map_torrent = {
> },
> },
> [CLK_100_MHZ] = {
> + [TYPE_DP] = {
> + [TYPE_NONE] = {
> + [NO_SSC] = &sl_dp_100_no_ssc_tx_ln_vals,
> + },
> + },
> [TYPE_PCIE] = {
> [TYPE_NONE] = {
> [NO_SSC] = NULL,
> @@ -3634,6 +3776,11 @@ static const struct cdns_torrent_data cdns_map_torrent = {
> },
> },
> [CLK_100_MHZ] = {
> + [TYPE_DP] = {
> + [TYPE_NONE] = {
> + [NO_SSC] = &sl_dp_100_no_ssc_rx_ln_vals,
> + },
> + },
> [TYPE_PCIE] = {
> [TYPE_NONE] = {
> [NO_SSC] = &pcie_100_no_ssc_rx_ln_vals,
> @@ -3917,6 +4064,11 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
> },
> },
> [CLK_100_MHZ] = {
> + [TYPE_DP] = {
> + [TYPE_NONE] = {
> + [NO_SSC] = &sl_dp_100_no_ssc_cmn_vals,
> + },
> + },
> [TYPE_PCIE] = {
> [TYPE_NONE] = {
> [NO_SSC] = NULL,
> @@ -4009,6 +4161,11 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
> },
> },
> [CLK_100_MHZ] = {
> + [TYPE_DP] = {
> + [TYPE_NONE] = {
> + [NO_SSC] = &sl_dp_100_no_ssc_tx_ln_vals,
> + },
> + },
> [TYPE_PCIE] = {
> [TYPE_NONE] = {
> [NO_SSC] = NULL,
> @@ -4101,6 +4258,11 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
> },
> },
> [CLK_100_MHZ] = {
> + [TYPE_DP] = {
> + [TYPE_NONE] = {
> + [NO_SSC] = &sl_dp_100_no_ssc_rx_ln_vals,
> + },
> + },
> [TYPE_PCIE] = {
> [TYPE_NONE] = {
> [NO_SSC] = &pcie_100_no_ssc_rx_ln_vals,
>

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