Merge tag 'phy_dp_modes_6.10' into next

phy_dp_modes_6.10

This contains the dp submode definition and associated qcom driver change

Author: vinodkoul

drivers/phy/qualcomm/phy-qcom-edp.c

@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/phy/phy.h>
+#include <linux/phy/phy-dp.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
@@ -69,19 +70,21 @@
 
 #define TXn_TRAN_DRVR_EMP_EN                    0x0078
 
-struct qcom_edp_cfg {
-	bool is_dp;
-
-	/* DP PHY swing and pre_emphasis tables */
+struct qcom_edp_swing_pre_emph_cfg {
 	const u8 (*swing_hbr_rbr)[4][4];
 	const u8 (*swing_hbr3_hbr2)[4][4];
 	const u8 (*pre_emphasis_hbr_rbr)[4][4];
 	const u8 (*pre_emphasis_hbr3_hbr2)[4][4];
 };
 
+struct qcom_edp_phy_cfg {
+	bool is_edp;
+	const struct qcom_edp_swing_pre_emph_cfg *swing_pre_emph_cfg;
+};
+
 struct qcom_edp {
 	struct device *dev;
-	const struct qcom_edp_cfg *cfg;
+	const struct qcom_edp_phy_cfg *cfg;
 
 	struct phy *phy;
 
@@ -97,6 +100,8 @@ struct qcom_edp {
 
 	struct clk_bulk_data clks[2];
 	struct regulator_bulk_data supplies[2];
+
+	bool is_edp;
 };
 
 static const u8 dp_swing_hbr_rbr[4][4] = {
@@ -127,8 +132,7 @@ static const u8 dp_pre_emp_hbr2_hbr3[4][4] = {
 	{ 0x04, 0xff, 0xff, 0xff }
 };
 
-static const struct qcom_edp_cfg dp_phy_cfg = {
-	.is_dp = true,
+static const struct qcom_edp_swing_pre_emph_cfg dp_phy_swing_pre_emph_cfg = {
 	.swing_hbr_rbr = &dp_swing_hbr_rbr,
 	.swing_hbr3_hbr2 = &dp_swing_hbr2_hbr3,
 	.pre_emphasis_hbr_rbr = &dp_pre_emp_hbr_rbr,
@@ -163,18 +167,28 @@ static const u8 edp_pre_emp_hbr2_hbr3[4][4] = {
 	{ 0x00, 0xff, 0xff, 0xff }
 };
 
-static const struct qcom_edp_cfg edp_phy_cfg = {
-	.is_dp = false,
+static const struct qcom_edp_swing_pre_emph_cfg edp_phy_swing_pre_emph_cfg = {
 	.swing_hbr_rbr = &edp_swing_hbr_rbr,
 	.swing_hbr3_hbr2 = &edp_swing_hbr2_hbr3,
 	.pre_emphasis_hbr_rbr = &edp_pre_emp_hbr_rbr,
 	.pre_emphasis_hbr3_hbr2 = &edp_pre_emp_hbr2_hbr3,
 };
 
+static const struct qcom_edp_phy_cfg sc7280_dp_phy_cfg = {
+};
+
+static const struct qcom_edp_phy_cfg sc8280xp_dp_phy_cfg = {
+	.swing_pre_emph_cfg = &dp_phy_swing_pre_emph_cfg,
+};
+
+static const struct qcom_edp_phy_cfg sc8280xp_edp_phy_cfg = {
+	.is_edp = true,
+	.swing_pre_emph_cfg = &edp_phy_swing_pre_emph_cfg,
+};
+
 static int qcom_edp_phy_init(struct phy *phy)
 {
 	struct qcom_edp *edp = phy_get_drvdata(phy);
-	const struct qcom_edp_cfg *cfg = edp->cfg;
 	int ret;
 	u8 cfg8;
 
@@ -201,7 +215,12 @@ static int qcom_edp_phy_init(struct phy *phy)
 	       DP_PHY_PD_CTL_PLL_PWRDN | DP_PHY_PD_CTL_DP_CLAMP_EN,
 	       edp->edp + DP_PHY_PD_CTL);
 
-	if (cfg && cfg->is_dp)
+	/*
+	 * TODO: Re-work the conditions around setting the cfg8 value
+	 * when more information becomes available about why this is
+	 * even needed.
+	 */
+	if (edp->cfg->swing_pre_emph_cfg && !edp->is_edp)
 		cfg8 = 0xb7;
 	else
 		cfg8 = 0x37;
@@ -235,7 +254,7 @@ static int qcom_edp_phy_init(struct phy *phy)
 
 static int qcom_edp_set_voltages(struct qcom_edp *edp, const struct phy_configure_opts_dp *dp_opts)
 {
-	const struct qcom_edp_cfg *cfg = edp->cfg;
+	const struct qcom_edp_swing_pre_emph_cfg *cfg = edp->cfg->swing_pre_emph_cfg;
 	unsigned int v_level = 0;
 	unsigned int p_level = 0;
 	u8 ldo_config;
@@ -246,6 +265,9 @@ static int qcom_edp_set_voltages(struct qcom_edp *edp, const struct phy_configur
 	if (!cfg)
 		return 0;
 
+	if (edp->is_edp)
+		cfg = &edp_phy_swing_pre_emph_cfg;
+
 	for (i = 0; i < dp_opts->lanes; i++) {
 		v_level = max(v_level, dp_opts->voltage[i]);
 		p_level = max(p_level, dp_opts->pre[i]);
@@ -262,7 +284,7 @@ static int qcom_edp_set_voltages(struct qcom_edp *edp, const struct phy_configur
 	if (swing == 0xff || emph == 0xff)
 		return -EINVAL;
 
-	ldo_config = (cfg && cfg->is_dp) ? 0x1 : 0x0;
+	ldo_config = edp->is_edp ? 0x0 : 0x1;
 
 	writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG);
 	writel(swing, edp->tx0 + TXn_TX_DRV_LVL);
@@ -448,10 +470,9 @@ static int qcom_edp_set_vco_div(const struct qcom_edp *edp, unsigned long *pixel
 static int qcom_edp_phy_power_on(struct phy *phy)
 {
 	const struct qcom_edp *edp = phy_get_drvdata(phy);
-	const struct qcom_edp_cfg *cfg = edp->cfg;
 	u32 bias0_en, drvr0_en, bias1_en, drvr1_en;
 	unsigned long pixel_freq;
-	u8 ldo_config;
+	u8 ldo_config = 0x0;
 	int timeout;
 	int ret;
 	u32 val;
@@ -469,7 +490,8 @@ static int qcom_edp_phy_power_on(struct phy *phy)
 		return timeout;
 
 
-	ldo_config = (cfg && cfg->is_dp) ? 0x1 : 0x0;
+	if (edp->cfg->swing_pre_emph_cfg && !edp->is_edp)
+		ldo_config = 0x1;
 
 	writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG);
 	writel(ldo_config, edp->tx1 + TXn_LDO_CONFIG);
@@ -590,6 +612,18 @@ static int qcom_edp_phy_power_off(struct phy *phy)
 	return 0;
 }
 
+static int qcom_edp_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode)
+{
+	struct qcom_edp *edp = phy_get_drvdata(phy);
+
+	if (mode != PHY_MODE_DP)
+		return -EINVAL;
+
+	edp->is_edp = submode == PHY_SUBMODE_EDP;
+
+	return 0;
+}
+
 static int qcom_edp_phy_exit(struct phy *phy)
 {
 	struct qcom_edp *edp = phy_get_drvdata(phy);
@@ -605,6 +639,7 @@ static const struct phy_ops qcom_edp_ops = {
 	.configure	= qcom_edp_phy_configure,
 	.power_on	= qcom_edp_phy_power_on,
 	.power_off	= qcom_edp_phy_power_off,
+	.set_mode	= qcom_edp_phy_set_mode,
 	.exit		= qcom_edp_phy_exit,
 	.owner		= THIS_MODULE,
 };
@@ -782,6 +817,7 @@ static int qcom_edp_phy_probe(struct platform_device *pdev)
 
 	edp->dev = dev;
 	edp->cfg = of_device_get_match_data(&pdev->dev);
+	edp->is_edp = edp->cfg->is_edp;
 
 	edp->edp = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(edp->edp))
@@ -840,10 +876,10 @@ static int qcom_edp_phy_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id qcom_edp_phy_match_table[] = {
-	{ .compatible = "qcom,sc7280-edp-phy" },
-	{ .compatible = "qcom,sc8180x-edp-phy" },
-	{ .compatible = "qcom,sc8280xp-dp-phy", .data = &dp_phy_cfg },
-	{ .compatible = "qcom,sc8280xp-edp-phy", .data = &edp_phy_cfg },
+	{ .compatible = "qcom,sc7280-edp-phy", .data = &sc7280_dp_phy_cfg, },
+	{ .compatible = "qcom,sc8180x-edp-phy", .data = &sc7280_dp_phy_cfg, },
+	{ .compatible = "qcom,sc8280xp-dp-phy", .data = &sc8280xp_dp_phy_cfg, },
+	{ .compatible = "qcom,sc8280xp-edp-phy", .data = &sc8280xp_edp_phy_cfg, },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, qcom_edp_phy_match_table);

include/linux/phy/phy-dp.h

@@ -8,6 +8,9 @@
 
 #include <linux/types.h>
 
+#define PHY_SUBMODE_DP	0
+#define PHY_SUBMODE_EDP	1
+
 /**
  * struct phy_configure_opts_dp - DisplayPort PHY configuration set
  *