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Message-ID: <aa6724af-99bc-de1d-4c03-82609b59174c@linaro.org>
Date: Wed, 4 Jan 2023 11:53:01 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Neil Armstrong <neil.armstrong@...aro.org>,
Rob Clark <robdclark@...il.com>,
Abhinav Kumar <quic_abhinavk@...cinc.com>,
Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Jonathan Marek <jonathan@...ek.ca>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] drm/msm/dsi: add support for DSI-PHY on SM8550
On 04/01/2023 11:08, Neil Armstrong wrote:
> SM8550 use a 4nm DSI PHYs, which share register definitions
> with 7nm DSI PHYs. Rather than duplicating the driver, handle
> 4nm variant inside the common 5+7nm driver.
>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---
> drivers/gpu/drm/msm/Kconfig | 4 +-
> drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 2 +
> drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 1 +
> drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 102 ++++++++++++++++++++++++------
> 4 files changed, 89 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
> index e7b100d97f88..949b18a29a55 100644
> --- a/drivers/gpu/drm/msm/Kconfig
> +++ b/drivers/gpu/drm/msm/Kconfig
> @@ -140,11 +140,11 @@ config DRM_MSM_DSI_10NM_PHY
> Choose this option if DSI PHY on SDM845 is used on the platform.
>
> config DRM_MSM_DSI_7NM_PHY
> - bool "Enable DSI 7nm/5nm PHY driver in MSM DRM"
> + bool "Enable DSI 7nm/5nm/4nm PHY driver in MSM DRM"
> depends on DRM_MSM_DSI
> default y
> help
> - Choose this option if DSI PHY on SM8150/SM8250/SM8350/SM8450/SC7280
> + Choose this option if DSI PHY on SM8150/SM8250/SM8350/SM8450/SM8550/SC7280
> is used on the platform.
>
> config DRM_MSM_HDMI
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> index 0c956fdab23e..54e03cc9fbe7 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> @@ -573,6 +573,8 @@ static const struct of_device_id dsi_phy_dt_match[] = {
> .data = &dsi_phy_5nm_8350_cfgs },
> { .compatible = "qcom,dsi-phy-5nm-8450",
> .data = &dsi_phy_5nm_8450_cfgs },
> + { .compatible = "qcom,dsi-phy-4nm-8550",
> + .data = &dsi_phy_4nm_8550_cfgs },
> #endif
> {}
> };
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> index f7a907ed2b4b..58f9e09f5224 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> @@ -59,6 +59,7 @@ extern const struct msm_dsi_phy_cfg dsi_phy_7nm_8150_cfgs;
> extern const struct msm_dsi_phy_cfg dsi_phy_7nm_7280_cfgs;
> extern const struct msm_dsi_phy_cfg dsi_phy_5nm_8350_cfgs;
> extern const struct msm_dsi_phy_cfg dsi_phy_5nm_8450_cfgs;
> +extern const struct msm_dsi_phy_cfg dsi_phy_4nm_8550_cfgs;
>
> struct msm_dsi_dphy_timing {
> u32 clk_zero;
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> index 7b2c16b3a36c..11629c431c30 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> @@ -47,6 +47,8 @@
> #define DSI_PHY_7NM_QUIRK_V4_2 BIT(2)
> /* Hardware is V4.3 */
> #define DSI_PHY_7NM_QUIRK_V4_3 BIT(3)
> +/* Hardware is V5.2 */
> +#define DSI_PHY_7NM_QUIRK_V5_2 BIT(4)
>
> struct dsi_pll_config {
> bool enable_ssc;
> @@ -124,14 +126,25 @@ static void dsi_pll_calc_dec_frac(struct dsi_pll_7nm *pll, struct dsi_pll_config
>
> if (pll->phy->cfg->quirks & DSI_PHY_7NM_QUIRK_PRE_V4_1)
> config->pll_clock_inverters = 0x28;
> - else if (pll_freq <= 1000000000ULL)
> - config->pll_clock_inverters = 0xa0;
> - else if (pll_freq <= 2500000000ULL)
> - config->pll_clock_inverters = 0x20;
> - else if (pll_freq <= 3020000000ULL)
> - config->pll_clock_inverters = 0x00;
> - else
> - config->pll_clock_inverters = 0x40;
> + else if ((pll->phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V5_2)) {
> + if (pll_freq <= 1300000000ULL)
> + config->pll_clock_inverters = 0xa0;
> + else if (pll_freq <= 2500000000ULL)
> + config->pll_clock_inverters = 0x20;
> + else if (pll_freq <= 4000000000ULL)
> + config->pll_clock_inverters = 0x00;
> + else
> + config->pll_clock_inverters = 0x40;
> + } else {
> + if (pll_freq <= 1000000000ULL)
> + config->pll_clock_inverters = 0xa0;
> + else if (pll_freq <= 2500000000ULL)
> + config->pll_clock_inverters = 0x20;
> + else if (pll_freq <= 3020000000ULL)
> + config->pll_clock_inverters = 0x00;
> + else
> + config->pll_clock_inverters = 0x40;
> + }
>
> config->decimal_div_start = dec;
> config->frac_div_start = frac;
> @@ -222,6 +235,13 @@ static void dsi_pll_config_hzindep_reg(struct dsi_pll_7nm *pll)
> vco_config_1 = 0x01;
> }
>
> + if ((pll->phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V5_2)) {
> + if (pll->vco_current_rate < 1557000000ULL)
> + vco_config_1 = 0x08;
> + else
> + vco_config_1 = 0x01;
> + }
> +
> dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_ANALOG_CONTROLS_FIVE_1,
> analog_controls_five_1);
> dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_VCO_CONFIG_1, vco_config_1);
> @@ -860,7 +880,8 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
> pr_warn("PLL turned on before configuring PHY\n");
>
> /* Request for REFGEN READY */
> - if (phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V4_3) {
> + if ((phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V4_3) ||
> + (phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V5_2)) {
> dsi_phy_write(phy->base + REG_DSI_7nm_PHY_CMN_GLBL_DIGTOP_SPARE10, 0x1);
> udelay(500);
> }
> @@ -881,20 +902,38 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
>
> glbl_str_swi_cal_sel_ctrl = 0x00;
> if (phy->cphy_mode) {
> - vreg_ctrl_0 = 0x51;
> - vreg_ctrl_1 = 0x55;
> + if ((phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V5_2)) {
> + vreg_ctrl_0 = 0x45;
> + vreg_ctrl_1 = 0x45;
> + } else {
> + vreg_ctrl_0 = 0x51;
> + vreg_ctrl_1 = 0x55;
> + }
Please move these quirk-specific values down, to the rest of if
(QUIRK_5_2) statement.
> glbl_hstx_str_ctrl_0 = 0x00;
> glbl_pemph_ctrl_0 = 0x11;
> lane_ctrl0 = 0x17;
> } else {
> - vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
> - vreg_ctrl_1 = 0x5c;
> + if ((phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V5_2)) {
> + vreg_ctrl_0 = 0x44;
> + vreg_ctrl_1 = 0x19;
> + } else {
> + vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
> + vreg_ctrl_1 = 0x5c;
> + }
> glbl_hstx_str_ctrl_0 = 0x88;
> glbl_pemph_ctrl_0 = 0x00;
> lane_ctrl0 = 0x1f;
> }
>
> - if (phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V4_3) {
> + if ((phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V5_2)) {
> + if (phy->cphy_mode) {
> + glbl_rescode_top_ctrl = 0x00;
> + glbl_rescode_bot_ctrl = 0x00;
> + } else {
> + glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3c : 0x03;
> + glbl_rescode_bot_ctrl = less_than_1500_mhz ? 0x38 : 0x3c;
> + }
> + } else if ((phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V4_3)) {
> if (phy->cphy_mode) {
> glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d : 0x01;
> glbl_rescode_bot_ctrl = less_than_1500_mhz ? 0x38 : 0x3b;
> @@ -943,9 +982,8 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_RBUF_CTRL, 0x00);
>
> /* program CMN_CTRL_4 for minor_ver 2 chipsets*/
> - data = dsi_phy_read(base + REG_DSI_7nm_PHY_CMN_REVISION_ID0);
> - data = data & (0xf0);
> - if (data == 0x20)
> + if ((phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V5_2) ||
> + (dsi_phy_read(base + REG_DSI_7nm_PHY_CMN_REVISION_ID0) & (0xf0)) == 0x20)
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_4, 0x04);
Ugh. I should change this statement to use quirks too.
>
> /* Configure PHY lane swap (TODO: we need to calculate this) */
> @@ -1058,7 +1096,8 @@ static void dsi_7nm_phy_disable(struct msm_dsi_phy *phy)
> dsi_phy_hw_v4_0_config_lpcdrx(phy, false);
>
> /* Turn off REFGEN Vote */
> - if (phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V4_3) {
> + if ((phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V4_3) ||
> + (phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V5_2)) {
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_DIGTOP_SPARE10, 0x0);
> wmb();
> /* Delay to ensure HW removes vote before PHY shut down */
> @@ -1092,6 +1131,10 @@ static const struct regulator_bulk_data dsi_phy_7nm_97800uA_regulators[] = {
> { .supply = "vdds", .init_load_uA = 97800 },
> };
>
> +static const struct regulator_bulk_data dsi_phy_7nm_98400uA_regulators[] = {
> + { .supply = "vdds", .init_load_uA = 98400 },
> +};
> +
> const struct msm_dsi_phy_cfg dsi_phy_7nm_cfgs = {
> .has_phy_lane = true,
> .regulator_data = dsi_phy_7nm_36mA_regulators,
> @@ -1201,3 +1244,26 @@ const struct msm_dsi_phy_cfg dsi_phy_5nm_8450_cfgs = {
> .num_dsi_phy = 2,
> .quirks = DSI_PHY_7NM_QUIRK_V4_3,
> };
> +
> +const struct msm_dsi_phy_cfg dsi_phy_4nm_8550_cfgs = {
> + .has_phy_lane = true,
> + .regulator_data = dsi_phy_7nm_98400uA_regulators,
> + .num_regulators = ARRAY_SIZE(dsi_phy_7nm_98400uA_regulators),
> + .ops = {
> + .enable = dsi_7nm_phy_enable,
> + .disable = dsi_7nm_phy_disable,
> + .pll_init = dsi_pll_7nm_init,
> + .save_pll_state = dsi_7nm_pll_save_state,
> + .restore_pll_state = dsi_7nm_pll_restore_state,
> + .set_continuous_clock = dsi_7nm_set_continuous_clock,
> + },
> + .min_pll_rate = 600000000UL,
> +#ifdef CONFIG_64BIT
> + .max_pll_rate = 5000000000UL,
> +#else
> + .max_pll_rate = ULONG_MAX,
> +#endif
> + .io_start = { 0xae95000, 0xae97000 },
> + .num_dsi_phy = 2,
> + .quirks = DSI_PHY_7NM_QUIRK_V5_2,
> +};
>
--
With best wishes
Dmitry
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