drm/mediatek: separate mipi_tx to different file

Different IC has different mipi_tx setting of dsi.
This patch separates the mipi_tx hardware relate part for mt8173.
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>

drivers/gpu/drm/mediatek/Makefile

@@ -12,6 +12,7 @@ mediatek-drm-y := mtk_disp_color.o \
 		  mtk_drm_plane.o \
 		  mtk_dsi.o \
 		  mtk_mipi_tx.o \
+		  mtk_mt8173_mipi_tx.o \
 		  mtk_dpi.o
 
 obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o

drivers/gpu/drm/mediatek/mtk_mipi_tx.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2019 MediaTek Inc.
+ * Author: Jitao Shi <jitao.shi@mediatek.com>
+ */
+
+#ifndef _MTK_MIPI_TX_H
+#define _MTK_MIPI_TX_H
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+
+struct mtk_mipitx_data {
+	const u32 mppll_preserve;
+	const struct clk_ops *mipi_tx_clk_ops;
+	void (*mipi_tx_enable_signal)(struct phy *phy);
+	void (*mipi_tx_disable_signal)(struct phy *phy);
+};
+
+struct mtk_mipi_tx {
+	struct device *dev;
+	void __iomem *regs;
+	u32 data_rate;
+	const struct mtk_mipitx_data *driver_data;
+	struct clk_hw pll_hw;
+	struct clk *pll;
+};
+
+struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw);
+void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, u32 bits);
+void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, u32 bits);
+void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, u32 mask,
+			     u32 data);
+int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+			     unsigned long parent_rate);
+unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw,
+					  unsigned long parent_rate);
+
+extern const struct mtk_mipitx_data mt2701_mipitx_data;
+extern const struct mtk_mipitx_data mt8173_mipitx_data;
+
+#endif

drivers/gpu/drm/mediatek/mtk_mt8173_mipi_tx.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 MediaTek Inc.
+ * Author: jitao.shi <jitao.shi@mediatek.com>
+ */
+
+#include "mtk_mipi_tx.h"
+
+#define MIPITX_DSI_CON		0x00
+#define RG_DSI_LDOCORE_EN		BIT(0)
+#define RG_DSI_CKG_LDOOUT_EN		BIT(1)
+#define RG_DSI_BCLK_SEL			(3 << 2)
+#define RG_DSI_LD_IDX_SEL		(7 << 4)
+#define RG_DSI_PHYCLK_SEL		(2 << 8)
+#define RG_DSI_DSICLK_FREQ_SEL		BIT(10)
+#define RG_DSI_LPTX_CLMP_EN		BIT(11)
+
+#define MIPITX_DSI_CLOCK_LANE	0x04
+#define MIPITX_DSI_DATA_LANE0	0x08
+#define MIPITX_DSI_DATA_LANE1	0x0c
+#define MIPITX_DSI_DATA_LANE2	0x10
+#define MIPITX_DSI_DATA_LANE3	0x14
+#define RG_DSI_LNTx_LDOOUT_EN		BIT(0)
+#define RG_DSI_LNTx_CKLANE_EN		BIT(1)
+#define RG_DSI_LNTx_LPTX_IPLUS1		BIT(2)
+#define RG_DSI_LNTx_LPTX_IPLUS2		BIT(3)
+#define RG_DSI_LNTx_LPTX_IMINUS		BIT(4)
+#define RG_DSI_LNTx_LPCD_IPLUS		BIT(5)
+#define RG_DSI_LNTx_LPCD_IMINUS		BIT(6)
+#define RG_DSI_LNTx_RT_CODE		(0xf << 8)
+
+#define MIPITX_DSI_TOP_CON	0x40
+#define RG_DSI_LNT_INTR_EN		BIT(0)
+#define RG_DSI_LNT_HS_BIAS_EN		BIT(1)
+#define RG_DSI_LNT_IMP_CAL_EN		BIT(2)
+#define RG_DSI_LNT_TESTMODE_EN		BIT(3)
+#define RG_DSI_LNT_IMP_CAL_CODE		(0xf << 4)
+#define RG_DSI_LNT_AIO_SEL		(7 << 8)
+#define RG_DSI_PAD_TIE_LOW_EN		BIT(11)
+#define RG_DSI_DEBUG_INPUT_EN		BIT(12)
+#define RG_DSI_PRESERVE			(7 << 13)
+
+#define MIPITX_DSI_BG_CON	0x44
+#define RG_DSI_BG_CORE_EN		BIT(0)
+#define RG_DSI_BG_CKEN			BIT(1)
+#define RG_DSI_BG_DIV			(0x3 << 2)
+#define RG_DSI_BG_FAST_CHARGE		BIT(4)
+#define RG_DSI_VOUT_MSK			(0x3ffff << 5)
+#define RG_DSI_V12_SEL			(7 << 5)
+#define RG_DSI_V10_SEL			(7 << 8)
+#define RG_DSI_V072_SEL			(7 << 11)
+#define RG_DSI_V04_SEL			(7 << 14)
+#define RG_DSI_V032_SEL			(7 << 17)
+#define RG_DSI_V02_SEL			(7 << 20)
+#define RG_DSI_BG_R1_TRIM		(0xf << 24)
+#define RG_DSI_BG_R2_TRIM		(0xf << 28)
+
+#define MIPITX_DSI_PLL_CON0	0x50
+#define RG_DSI_MPPLL_PLL_EN		BIT(0)
+#define RG_DSI_MPPLL_DIV_MSK		(0x1ff << 1)
+#define RG_DSI_MPPLL_PREDIV		(3 << 1)
+#define RG_DSI_MPPLL_TXDIV0		(3 << 3)
+#define RG_DSI_MPPLL_TXDIV1		(3 << 5)
+#define RG_DSI_MPPLL_POSDIV		(7 << 7)
+#define RG_DSI_MPPLL_MONVC_EN		BIT(10)
+#define RG_DSI_MPPLL_MONREF_EN		BIT(11)
+#define RG_DSI_MPPLL_VOD_EN		BIT(12)
+
+#define MIPITX_DSI_PLL_CON1	0x54
+#define RG_DSI_MPPLL_SDM_FRA_EN		BIT(0)
+#define RG_DSI_MPPLL_SDM_SSC_PH_INIT	BIT(1)
+#define RG_DSI_MPPLL_SDM_SSC_EN		BIT(2)
+#define RG_DSI_MPPLL_SDM_SSC_PRD	(0xffff << 16)
+
+#define MIPITX_DSI_PLL_CON2	0x58
+
+#define MIPITX_DSI_PLL_TOP	0x64
+#define RG_DSI_MPPLL_PRESERVE		(0xff << 8)
+
+#define MIPITX_DSI_PLL_PWR	0x68
+#define RG_DSI_MPPLL_SDM_PWR_ON		BIT(0)
+#define RG_DSI_MPPLL_SDM_ISO_EN		BIT(1)
+#define RG_DSI_MPPLL_SDM_PWR_ACK	BIT(8)
+
+#define MIPITX_DSI_SW_CTRL	0x80
+#define SW_CTRL_EN			BIT(0)
+
+#define MIPITX_DSI_SW_CTRL_CON0	0x84
+#define SW_LNTC_LPTX_PRE_OE		BIT(0)
+#define SW_LNTC_LPTX_OE			BIT(1)
+#define SW_LNTC_LPTX_P			BIT(2)
+#define SW_LNTC_LPTX_N			BIT(3)
+#define SW_LNTC_HSTX_PRE_OE		BIT(4)
+#define SW_LNTC_HSTX_OE			BIT(5)
+#define SW_LNTC_HSTX_ZEROCLK		BIT(6)
+#define SW_LNT0_LPTX_PRE_OE		BIT(7)
+#define SW_LNT0_LPTX_OE			BIT(8)
+#define SW_LNT0_LPTX_P			BIT(9)
+#define SW_LNT0_LPTX_N			BIT(10)
+#define SW_LNT0_HSTX_PRE_OE		BIT(11)
+#define SW_LNT0_HSTX_OE			BIT(12)
+#define SW_LNT0_LPRX_EN			BIT(13)
+#define SW_LNT1_LPTX_PRE_OE		BIT(14)
+#define SW_LNT1_LPTX_OE			BIT(15)
+#define SW_LNT1_LPTX_P			BIT(16)
+#define SW_LNT1_LPTX_N			BIT(17)
+#define SW_LNT1_HSTX_PRE_OE		BIT(18)
+#define SW_LNT1_HSTX_OE			BIT(19)
+#define SW_LNT2_LPTX_PRE_OE		BIT(20)
+#define SW_LNT2_LPTX_OE			BIT(21)
+#define SW_LNT2_LPTX_P			BIT(22)
+#define SW_LNT2_LPTX_N			BIT(23)
+#define SW_LNT2_HSTX_PRE_OE		BIT(24)
+#define SW_LNT2_HSTX_OE			BIT(25)
+
+static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw)
+{
+	struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
+	u8 txdiv, txdiv0, txdiv1;
+	u64 pcw;
+
+	dev_dbg(mipi_tx->dev, "prepare: %u Hz\n", mipi_tx->data_rate);
+
+	if (mipi_tx->data_rate >= 500000000) {
+		txdiv = 1;
+		txdiv0 = 0;
+		txdiv1 = 0;
+	} else if (mipi_tx->data_rate >= 250000000) {
+		txdiv = 2;
+		txdiv0 = 1;
+		txdiv1 = 0;
+	} else if (mipi_tx->data_rate >= 125000000) {
+		txdiv = 4;
+		txdiv0 = 2;
+		txdiv1 = 0;
+	} else if (mipi_tx->data_rate > 62000000) {
+		txdiv = 8;
+		txdiv0 = 2;
+		txdiv1 = 1;
+	} else if (mipi_tx->data_rate >= 50000000) {
+		txdiv = 16;
+		txdiv0 = 2;
+		txdiv1 = 2;
+	} else {
+		return -EINVAL;
+	}
+
+	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_BG_CON,
+				RG_DSI_VOUT_MSK |
+				RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN,
+				(4 << 20) | (4 << 17) | (4 << 14) |
+				(4 << 11) | (4 << 8) | (4 << 5) |
+				RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
+
+	usleep_range(30, 100);
+
+	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_TOP_CON,
+				RG_DSI_LNT_IMP_CAL_CODE | RG_DSI_LNT_HS_BIAS_EN,
+				(8 << 4) | RG_DSI_LNT_HS_BIAS_EN);
+
+	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_CON,
+			     RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
+
+	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
+				RG_DSI_MPPLL_SDM_PWR_ON |
+				RG_DSI_MPPLL_SDM_ISO_EN,
+				RG_DSI_MPPLL_SDM_PWR_ON);
+
+	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
+			       RG_DSI_MPPLL_PLL_EN);
+
+	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
+				RG_DSI_MPPLL_TXDIV0 | RG_DSI_MPPLL_TXDIV1 |
+				RG_DSI_MPPLL_PREDIV,
+				(txdiv0 << 3) | (txdiv1 << 5));
+
+	/*
+	 * PLL PCW config
+	 * PCW bit 24~30 = integer part of pcw
+	 * PCW bit 0~23 = fractional part of pcw
+	 * pcw = data_Rate*4*txdiv/(Ref_clk*2);
+	 * Post DIV =4, so need data_Rate*4
+	 * Ref_clk is 26MHz
+	 */
+	pcw = div_u64(((u64)mipi_tx->data_rate * 2 * txdiv) << 24,
+		      26000000);
+	writel(pcw, mipi_tx->regs + MIPITX_DSI_PLL_CON2);
+
+	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
+			     RG_DSI_MPPLL_SDM_FRA_EN);
+
+	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON0, RG_DSI_MPPLL_PLL_EN);
+
+	usleep_range(20, 100);
+
+	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
+			       RG_DSI_MPPLL_SDM_SSC_EN);
+
+	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
+				RG_DSI_MPPLL_PRESERVE,
+				mipi_tx->driver_data->mppll_preserve);
+
+	return 0;
+}
+
+static void mtk_mipi_tx_pll_unprepare(struct clk_hw *hw)
+{
+	struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
+
+	dev_dbg(mipi_tx->dev, "unprepare\n");
+
+	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
+			       RG_DSI_MPPLL_PLL_EN);
+
+	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
+				RG_DSI_MPPLL_PRESERVE, 0);
+
+	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
+				RG_DSI_MPPLL_SDM_ISO_EN |
+				RG_DSI_MPPLL_SDM_PWR_ON,
+				RG_DSI_MPPLL_SDM_ISO_EN);
+
+	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
+			       RG_DSI_LNT_HS_BIAS_EN);
+
+	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_CON,
+			       RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
+
+	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_BG_CON,
+			       RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
+
+	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
+			       RG_DSI_MPPLL_DIV_MSK);
+}
+
+static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+				       unsigned long *prate)
+{
+	return clamp_val(rate, 50000000, 1250000000);
+}
+
+static const struct clk_ops mtk_mipi_tx_pll_ops = {
+	.prepare = mtk_mipi_tx_pll_prepare,
+	.unprepare = mtk_mipi_tx_pll_unprepare,
+	.round_rate = mtk_mipi_tx_pll_round_rate,
+	.set_rate = mtk_mipi_tx_pll_set_rate,
+	.recalc_rate = mtk_mipi_tx_pll_recalc_rate,
+};
+
+static void mtk_mipi_tx_power_on_signal(struct phy *phy)
+{
+	struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
+	u32 reg;
+
+	for (reg = MIPITX_DSI_CLOCK_LANE;
+	     reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
+		mtk_mipi_tx_set_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
+
+	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
+			       RG_DSI_PAD_TIE_LOW_EN);
+}
+
+static void mtk_mipi_tx_power_off_signal(struct phy *phy)
+{
+	struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
+	u32 reg;
+
+	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_TOP_CON,
+			     RG_DSI_PAD_TIE_LOW_EN);
+
+	for (reg = MIPITX_DSI_CLOCK_LANE;
+	     reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
+		mtk_mipi_tx_clear_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
+}
+
+const struct mtk_mipitx_data mt2701_mipitx_data = {
+	.mppll_preserve = (3 << 8),
+	.mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
+	.mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
+	.mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,
+};
+
+const struct mtk_mipitx_data mt8173_mipitx_data = {
+	.mppll_preserve = (0 << 8),
+	.mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
+	.mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
+	.mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,
+};