Commit efda51a5 authored by Jitao Shi's avatar Jitao Shi Committed by CK Hu
Browse files

drm/mediatek: add mipi_tx driver for mt8183 



This patch add mt8183 mipi_tx driver.
And also support other chips that use the same binding and driver.

Signed-off-by: default avatarJitao Shi <jitao.shi@mediatek.com>
Signed-off-by: default avatarCK Hu <ck.hu@mediatek.com>
parent 78e01a8d

drivers/gpu/drm/mediatek/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ mediatek-drm-y := mtk_disp_color.o \ 
		  mtk_dsi.o \

		  mtk_mipi_tx.o \

		  mtk_mt8173_mipi_tx.o \

		  mtk_mt8183_mipi_tx.o \

		  mtk_dpi.o



obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o

drivers/gpu/drm/mediatek/mtk_mipi_tx.c

+2 −0
Original line number Diff line number Diff line
@@ -175,6 +175,8 @@ static const struct of_device_id mtk_mipi_tx_match[] = { 
	  .data = &mt2701_mipitx_data },

	{ .compatible = "mediatek,mt8173-mipi-tx",

	  .data = &mt8173_mipitx_data },

	{ .compatible = "mediatek,mt8183-mipi-tx",

	  .data = &mt8183_mipitx_data },

	{ },

};

drivers/gpu/drm/mediatek/mtk_mipi_tx.h

+1 −0
Original line number Diff line number Diff line
@@ -44,5 +44,6 @@ unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw, 


extern const struct mtk_mipitx_data mt2701_mipitx_data;

extern const struct mtk_mipitx_data mt8173_mipitx_data;

extern const struct mtk_mipitx_data mt8183_mipitx_data;



#endif

drivers/gpu/drm/mediatek/mtk_mt8183_mipi_tx.c

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+149 −0
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// 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_LANE_CON		0x000c

#define RG_DSI_CPHY_T1DRV_EN		BIT(0)

#define RG_DSI_ANA_CK_SEL		BIT(1)

#define RG_DSI_PHY_CK_SEL		BIT(2)

#define RG_DSI_CPHY_EN			BIT(3)

#define RG_DSI_PHYCK_INV_EN		BIT(4)

#define RG_DSI_PWR04_EN			BIT(5)

#define RG_DSI_BG_LPF_EN		BIT(6)

#define RG_DSI_BG_CORE_EN		BIT(7)

#define RG_DSI_PAD_TIEL_SEL		BIT(8)



#define MIPITX_PLL_PWR		0x0028

#define MIPITX_PLL_CON0		0x002c

#define MIPITX_PLL_CON1		0x0030

#define MIPITX_PLL_CON2		0x0034

#define MIPITX_PLL_CON3		0x0038

#define MIPITX_PLL_CON4		0x003c

#define RG_DSI_PLL_IBIAS		(3 << 10)



#define MIPITX_D2_SW_CTL_EN	0x0144

#define MIPITX_D0_SW_CTL_EN	0x0244

#define MIPITX_CK_CKMODE_EN	0x0328

#define DSI_CK_CKMODE_EN		BIT(0)

#define MIPITX_CK_SW_CTL_EN	0x0344

#define MIPITX_D1_SW_CTL_EN	0x0444

#define MIPITX_D3_SW_CTL_EN	0x0544

#define DSI_SW_CTL_EN			BIT(0)

#define AD_DSI_PLL_SDM_PWR_ON		BIT(0)

#define AD_DSI_PLL_SDM_ISO_EN		BIT(1)



#define RG_DSI_PLL_EN			BIT(4)

#define RG_DSI_PLL_POSDIV		(0x7 << 8)



static int mtk_mipi_tx_pll_enable(struct clk_hw *hw)

{

	struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);

	unsigned int txdiv, txdiv0;

	u64 pcw;



	dev_dbg(mipi_tx->dev, "enable: %u bps\n", mipi_tx->data_rate);



	if (mipi_tx->data_rate >= 2000000000) {

		txdiv = 1;

		txdiv0 = 0;

	} else if (mipi_tx->data_rate >= 1000000000) {

		txdiv = 2;

		txdiv0 = 1;

	} else if (mipi_tx->data_rate >= 500000000) {

		txdiv = 4;

		txdiv0 = 2;

	} else if (mipi_tx->data_rate > 250000000) {

		txdiv = 8;

		txdiv0 = 3;

	} else if (mipi_tx->data_rate >= 125000000) {

		txdiv = 16;

		txdiv0 = 4;

	} else {

		return -EINVAL;

	}



	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON4, RG_DSI_PLL_IBIAS);



	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_PWR_ON);

	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);

	udelay(1);

	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_ISO_EN);

	pcw = div_u64(((u64)mipi_tx->data_rate * txdiv) << 24, 26000000);

	writel(pcw, mipi_tx->regs + MIPITX_PLL_CON0);

	mtk_mipi_tx_update_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_POSDIV,

				txdiv0 << 8);

	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);



	return 0;

}



static void mtk_mipi_tx_pll_disable(struct clk_hw *hw)

{

	struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);



	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);



	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_ISO_EN);

	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_PWR_ON);

}



static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,

				       unsigned long *prate)

{

	return clamp_val(rate, 50000000, 1600000000);

}



static const struct clk_ops mtk_mipi_tx_pll_ops = {

	.enable = mtk_mipi_tx_pll_enable,

	.disable = mtk_mipi_tx_pll_disable,

	.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);



	/* BG_LPF_EN / BG_CORE_EN */

	writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN,

	       mipi_tx->regs + MIPITX_LANE_CON);

	usleep_range(30, 100);

	writel(RG_DSI_BG_CORE_EN | RG_DSI_BG_LPF_EN,

	       mipi_tx->regs + MIPITX_LANE_CON);



	/* Switch OFF each Lane */

	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D0_SW_CTL_EN, DSI_SW_CTL_EN);

	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D1_SW_CTL_EN, DSI_SW_CTL_EN);

	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D2_SW_CTL_EN, DSI_SW_CTL_EN);

	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D3_SW_CTL_EN, DSI_SW_CTL_EN);

	mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_CK_SW_CTL_EN, DSI_SW_CTL_EN);



	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_CK_CKMODE_EN, DSI_CK_CKMODE_EN);

}



static void mtk_mipi_tx_power_off_signal(struct phy *phy)

{

	struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);



	/* Switch ON each Lane */

	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D0_SW_CTL_EN, DSI_SW_CTL_EN);

	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D1_SW_CTL_EN, DSI_SW_CTL_EN);

	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D2_SW_CTL_EN, DSI_SW_CTL_EN);

	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D3_SW_CTL_EN, DSI_SW_CTL_EN);

	mtk_mipi_tx_set_bits(mipi_tx, MIPITX_CK_SW_CTL_EN, DSI_SW_CTL_EN);



	writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN,

	       mipi_tx->regs + MIPITX_LANE_CON);

	writel(RG_DSI_PAD_TIEL_SEL, mipi_tx->regs + MIPITX_LANE_CON);

}



const struct mtk_mipitx_data mt8183_mipitx_data = {

	.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,

};