Re: [PATCH 5/6] drm/msm/dsi: add support for DSI-PHY on SM8550
From: Neil Armstrong
Date: Wed Jan 04 2023 - 05:12:53 EST
On 04/01/2023 10:53, Dmitry Baryshkov wrote:
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@xxxxxxxxxx>
---
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.
Ok
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.
Sorrt I don't see what you mean, should I change the original REVISION_ID0 to a proper quirk ?
/* 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,
+};
Thanks,
Neil