[people/ms/u-boot.git] / drivers / video / anx9804.c

/*
 * (C) 2015 Hans de Goede <hdegoede@redhat.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * Support for the ANX9804 bridge chip, which can take pixel data coming
 * from a parallel LCD interface and translate it on the flight into a DP
 * interface for driving eDP TFT displays.
 */

#include <common.h>
#include <i2c.h>
#include "anx9804.h"

/* Registers at i2c address 0x38 */

#define ANX9804_HDCP_CONTROL_0_REG				0x01

#define ANX9804_SYS_CTRL2_REG					0x81
#define ANX9804_SYS_CTRL2_CHA_STA				0x04

#define ANX9804_SYS_CTRL3_REG					0x82
#define ANX9804_SYS_CTRL3_VALID_CTRL				BIT(0)
#define ANX9804_SYS_CTRL3_F_VALID				BIT(1)
#define ANX9804_SYS_CTRL3_HPD_CTRL				BIT(4)
#define ANX9804_SYS_CTRL3_F_HPD					BIT(5)

#define ANX9804_LINK_BW_SET_REG					0xa0
#define ANX9804_LANE_COUNT_SET_REG				0xa1
#define ANX9804_TRAINING_PTN_SET_REG				0xa2
#define ANX9804_TRAINING_LANE0_SET_REG				0xa3
#define ANX9804_TRAINING_LANE1_SET_REG				0xa4
#define ANX9804_TRAINING_LANE2_SET_REG				0xa5
#define ANX9804_TRAINING_LANE3_SET_REG				0xa6

#define ANX9804_LINK_TRAINING_CTRL_REG				0xa8
#define ANX9804_LINK_TRAINING_CTRL_EN				BIT(0)

#define ANX9804_LINK_DEBUG_REG					0xb8
#define ANX9804_PLL_CTRL_REG					0xc7	
#define ANX9804_ANALOG_POWER_DOWN_REG				0xc8

/* Registers at i2c address 0x39 */

#define ANX9804_DEV_IDH_REG					0x03

#define ANX9804_POWERD_CTRL_REG					0x05
#define ANX9804_POWERD_AUDIO					BIT(4)

#define ANX9804_RST_CTRL_REG					0x06

#define ANX9804_RST_CTRL2_REG					0x07
#define ANX9804_RST_CTRL2_AUX					BIT(2)
#define ANX9804_RST_CTRL2_AC_MODE				BIT(6)

#define ANX9804_VID_CTRL1_REG					0x08
#define ANX9804_VID_CTRL1_VID_EN				BIT(7)
#define ANX9804_VID_CTRL1_EDGE					BIT(0)

#define ANX9804_VID_CTRL2_REG					0x09
#define ANX9804_ANALOG_DEBUG_REG1				0xdc
#define ANX9804_ANALOG_DEBUG_REG3				0xde
#define ANX9804_PLL_FILTER_CTRL1				0xdf
#define ANX9804_PLL_FILTER_CTRL3				0xe1
#define ANX9804_PLL_FILTER_CTRL					0xe2
#define ANX9804_PLL_CTRL3					0xe6

/**
 * anx9804_init() - Init anx9804 parallel lcd to edp bridge chip
 *
 * This function will init an anx9804 parallel lcd to dp bridge chip
 * using the passed in parameters.
 *
 * @i2c_bus:	Number of the i2c bus to which the anx9804 is connected.
 * @lanes:	Number of displayport lanes to use
 * @data_rate:	Register value for the bandwidth reg 0x06: 1.62G, 0x0a: 2.7G
 * @bpp:	Bits per pixel, must be 18 or 24
 */
void anx9804_init(unsigned int i2c_bus, u8 lanes, u8 data_rate, int bpp)
{
	unsigned int orig_i2c_bus = i2c_get_bus_num();
	u8 c, colordepth;
	int i;

	i2c_set_bus_num(i2c_bus);

	if (bpp == 18)
		colordepth = 0x00; /* 6 bit */
	else
		colordepth = 0x10; /* 8 bit */

	/* Reset */
	i2c_reg_write(0x39, ANX9804_RST_CTRL_REG, 1);
	mdelay(100);
	i2c_reg_write(0x39, ANX9804_RST_CTRL_REG, 0);

	/* Write 0 to the powerdown reg (powerup everything) */
	i2c_reg_write(0x39, ANX9804_POWERD_CTRL_REG, 0);

	c = i2c_reg_read(0x39, ANX9804_DEV_IDH_REG);
	if (c != 0x98) {
		printf("Error anx9804 chipid mismatch\n");
		i2c_set_bus_num(orig_i2c_bus);
		return;
	}

	for (i = 0; i < 100; i++) {
		c = i2c_reg_read(0x38, ANX9804_SYS_CTRL2_REG);
		i2c_reg_write(0x38, ANX9804_SYS_CTRL2_REG, c);
		c = i2c_reg_read(0x38, ANX9804_SYS_CTRL2_REG);
		if ((c & ANX9804_SYS_CTRL2_CHA_STA) == 0)
			break;

		mdelay(5);
	}
	if (i == 100)
		printf("Error anx9804 clock is not stable\n");

	i2c_reg_write(0x39, ANX9804_VID_CTRL2_REG, colordepth);
	
	/* Set a bunch of analog related register values */
	i2c_reg_write(0x38, ANX9804_PLL_CTRL_REG, 0x07); 
	i2c_reg_write(0x39, ANX9804_PLL_FILTER_CTRL3, 0x19); 
	i2c_reg_write(0x39, ANX9804_PLL_CTRL3, 0xd9); 
	i2c_reg_write(0x39, ANX9804_RST_CTRL2_REG, ANX9804_RST_CTRL2_AC_MODE);
	i2c_reg_write(0x39, ANX9804_ANALOG_DEBUG_REG1, 0xf0);
	i2c_reg_write(0x39, ANX9804_ANALOG_DEBUG_REG3, 0x99);
	i2c_reg_write(0x39, ANX9804_PLL_FILTER_CTRL1, 0x7b);
	i2c_reg_write(0x38, ANX9804_LINK_DEBUG_REG, 0x30);
	i2c_reg_write(0x39, ANX9804_PLL_FILTER_CTRL, 0x06);

	/* Force HPD */
	i2c_reg_write(0x38, ANX9804_SYS_CTRL3_REG,
		      ANX9804_SYS_CTRL3_F_HPD | ANX9804_SYS_CTRL3_HPD_CTRL);

	/* Power up and configure lanes */
	i2c_reg_write(0x38, ANX9804_ANALOG_POWER_DOWN_REG, 0x00);
	i2c_reg_write(0x38, ANX9804_TRAINING_LANE0_SET_REG, 0x00);
	i2c_reg_write(0x38, ANX9804_TRAINING_LANE1_SET_REG, 0x00);
	i2c_reg_write(0x38, ANX9804_TRAINING_LANE2_SET_REG, 0x00);
	i2c_reg_write(0x38, ANX9804_TRAINING_LANE3_SET_REG, 0x00);

	/* Reset AUX CH */
	i2c_reg_write(0x39, ANX9804_RST_CTRL2_REG,
		      ANX9804_RST_CTRL2_AC_MODE | ANX9804_RST_CTRL2_AUX);
	i2c_reg_write(0x39, ANX9804_RST_CTRL2_REG,
		      ANX9804_RST_CTRL2_AC_MODE);

	/* Powerdown audio and some other unused bits */
	i2c_reg_write(0x39, ANX9804_POWERD_CTRL_REG, ANX9804_POWERD_AUDIO);
	i2c_reg_write(0x38, ANX9804_HDCP_CONTROL_0_REG, 0x00);
	i2c_reg_write(0x38, 0xa7, 0x00);

	/* Set data-rate / lanes */
	i2c_reg_write(0x38, ANX9804_LINK_BW_SET_REG, data_rate);
	i2c_reg_write(0x38, ANX9804_LANE_COUNT_SET_REG, lanes);

	/* Link training */	
	i2c_reg_write(0x38, ANX9804_LINK_TRAINING_CTRL_REG,
		      ANX9804_LINK_TRAINING_CTRL_EN);
	mdelay(5);
	for (i = 0; i < 100; i++) {
		c = i2c_reg_read(0x38, ANX9804_LINK_TRAINING_CTRL_REG);
		if ((c & 0x01) == 0)
			break;

		mdelay(5);
	}
	if(i == 100) {
		printf("Error anx9804 link training timeout\n");
		i2c_set_bus_num(orig_i2c_bus);
		return;
	}

	/* Enable */
	i2c_reg_write(0x39, ANX9804_VID_CTRL1_REG,
		      ANX9804_VID_CTRL1_VID_EN | ANX9804_VID_CTRL1_EDGE);
	/* Force stream valid */
	i2c_reg_write(0x38, ANX9804_SYS_CTRL3_REG,
		      ANX9804_SYS_CTRL3_F_HPD | ANX9804_SYS_CTRL3_HPD_CTRL |
		      ANX9804_SYS_CTRL3_F_VALID | ANX9804_SYS_CTRL3_VALID_CTRL);

	i2c_set_bus_num(orig_i2c_bus);
}
Commit	Line	Data
66525bb7 HG	1	/*
	2	* (C) 2015 Hans de Goede <hdegoede@redhat.com>
	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
	7	/*
	8	* Support for the ANX9804 bridge chip, which can take pixel data coming
	9	* from a parallel LCD interface and translate it on the flight into a DP
	10	* interface for driving eDP TFT displays.
	11	*/
	12
	13	#include <common.h>
	14	#include <i2c.h>
	15	#include "anx9804.h"
	16
66525bb7 HG	17	/* Registers at i2c address 0x38 */
	18
	19	#define ANX9804_HDCP_CONTROL_0_REG 0x01
	20
	21	#define ANX9804_SYS_CTRL2_REG 0x81
	22	#define ANX9804_SYS_CTRL2_CHA_STA 0x04
	23
	24	#define ANX9804_SYS_CTRL3_REG 0x82
	25	#define ANX9804_SYS_CTRL3_VALID_CTRL BIT(0)
	26	#define ANX9804_SYS_CTRL3_F_VALID BIT(1)
	27	#define ANX9804_SYS_CTRL3_HPD_CTRL BIT(4)
	28	#define ANX9804_SYS_CTRL3_F_HPD BIT(5)
	29
	30	#define ANX9804_LINK_BW_SET_REG 0xa0
	31	#define ANX9804_LANE_COUNT_SET_REG 0xa1
	32	#define ANX9804_TRAINING_PTN_SET_REG 0xa2
	33	#define ANX9804_TRAINING_LANE0_SET_REG 0xa3
	34	#define ANX9804_TRAINING_LANE1_SET_REG 0xa4
	35	#define ANX9804_TRAINING_LANE2_SET_REG 0xa5
	36	#define ANX9804_TRAINING_LANE3_SET_REG 0xa6
	37
	38	#define ANX9804_LINK_TRAINING_CTRL_REG 0xa8
	39	#define ANX9804_LINK_TRAINING_CTRL_EN BIT(0)
	40
	41	#define ANX9804_LINK_DEBUG_REG 0xb8
	42	#define ANX9804_PLL_CTRL_REG 0xc7
	43	#define ANX9804_ANALOG_POWER_DOWN_REG 0xc8
	44
	45	/* Registers at i2c address 0x39 */
	46
	47	#define ANX9804_DEV_IDH_REG 0x03
	48
	49	#define ANX9804_POWERD_CTRL_REG 0x05
	50	#define ANX9804_POWERD_AUDIO BIT(4)
	51
	52	#define ANX9804_RST_CTRL_REG 0x06
	53
	54	#define ANX9804_RST_CTRL2_REG 0x07
	55	#define ANX9804_RST_CTRL2_AUX BIT(2)
	56	#define ANX9804_RST_CTRL2_AC_MODE BIT(6)
	57
	58	#define ANX9804_VID_CTRL1_REG 0x08
	59	#define ANX9804_VID_CTRL1_VID_EN BIT(7)
	60	#define ANX9804_VID_CTRL1_EDGE BIT(0)
	61
	62	#define ANX9804_VID_CTRL2_REG 0x09
	63	#define ANX9804_ANALOG_DEBUG_REG1 0xdc
	64	#define ANX9804_ANALOG_DEBUG_REG3 0xde
	65	#define ANX9804_PLL_FILTER_CTRL1 0xdf
	66	#define ANX9804_PLL_FILTER_CTRL3 0xe1
	67	#define ANX9804_PLL_FILTER_CTRL 0xe2
	68	#define ANX9804_PLL_CTRL3 0xe6
	69
	70	/**
	71	* anx9804_init() - Init anx9804 parallel lcd to edp bridge chip
	72	*
	73	* This function will init an anx9804 parallel lcd to dp bridge chip
	74	* using the passed in parameters.
	75	*
	76	* @i2c_bus: Number of the i2c bus to which the anx9804 is connected.
	77	* @lanes: Number of displayport lanes to use
	78	* @data_rate: Register value for the bandwidth reg 0x06: 1.62G, 0x0a: 2.7G
	79	* @bpp: Bits per pixel, must be 18 or 24
	80	*/
81	void anx9804_init(unsigned int i2c_bus, u8 lanes, u8 data_rate, int bpp)
82	{
83	unsigned int orig_i2c_bus = i2c_get_bus_num();
84	u8 c, colordepth;
85	int i;
86
87	i2c_set_bus_num(i2c_bus);
88
89	if (bpp == 18)
90	colordepth = 0x00; /* 6 bit */
91	else
92	colordepth = 0x10; /* 8 bit */
93
94	/* Reset */
95	i2c_reg_write(0x39, ANX9804_RST_CTRL_REG, 1);
96	mdelay(100);
97	i2c_reg_write(0x39, ANX9804_RST_CTRL_REG, 0);
98
99	/* Write 0 to the powerdown reg (powerup everything) */
100	i2c_reg_write(0x39, ANX9804_POWERD_CTRL_REG, 0);
101
102	c = i2c_reg_read(0x39, ANX9804_DEV_IDH_REG);
103	if (c != 0x98) {
104	printf("Error anx9804 chipid mismatch\n");
105	i2c_set_bus_num(orig_i2c_bus);
106	return;
107	}
108
109	for (i = 0; i < 100; i++) {
110	c = i2c_reg_read(0x38, ANX9804_SYS_CTRL2_REG);
111	i2c_reg_write(0x38, ANX9804_SYS_CTRL2_REG, c);
112	c = i2c_reg_read(0x38, ANX9804_SYS_CTRL2_REG);
113	if ((c & ANX9804_SYS_CTRL2_CHA_STA) == 0)
114	break;
115
116	mdelay(5);
117	}
118	if (i == 100)
119	printf("Error anx9804 clock is not stable\n");
120
121	i2c_reg_write(0x39, ANX9804_VID_CTRL2_REG, colordepth);
122
123	/* Set a bunch of analog related register values */
124	i2c_reg_write(0x38, ANX9804_PLL_CTRL_REG, 0x07);
125	i2c_reg_write(0x39, ANX9804_PLL_FILTER_CTRL3, 0x19);
126	i2c_reg_write(0x39, ANX9804_PLL_CTRL3, 0xd9);
127	i2c_reg_write(0x39, ANX9804_RST_CTRL2_REG, ANX9804_RST_CTRL2_AC_MODE);
128	i2c_reg_write(0x39, ANX9804_ANALOG_DEBUG_REG1, 0xf0);
129	i2c_reg_write(0x39, ANX9804_ANALOG_DEBUG_REG3, 0x99);
130	i2c_reg_write(0x39, ANX9804_PLL_FILTER_CTRL1, 0x7b);
131	i2c_reg_write(0x38, ANX9804_LINK_DEBUG_REG, 0x30);
132	i2c_reg_write(0x39, ANX9804_PLL_FILTER_CTRL, 0x06);
133
134	/* Force HPD */
135	i2c_reg_write(0x38, ANX9804_SYS_CTRL3_REG,
136	ANX9804_SYS_CTRL3_F_HPD \| ANX9804_SYS_CTRL3_HPD_CTRL);
137
138	/* Power up and configure lanes */
139	i2c_reg_write(0x38, ANX9804_ANALOG_POWER_DOWN_REG, 0x00);
140	i2c_reg_write(0x38, ANX9804_TRAINING_LANE0_SET_REG, 0x00);
141	i2c_reg_write(0x38, ANX9804_TRAINING_LANE1_SET_REG, 0x00);
142	i2c_reg_write(0x38, ANX9804_TRAINING_LANE2_SET_REG, 0x00);
143	i2c_reg_write(0x38, ANX9804_TRAINING_LANE3_SET_REG, 0x00);
144
145	/* Reset AUX CH */
146	i2c_reg_write(0x39, ANX9804_RST_CTRL2_REG,
147	ANX9804_RST_CTRL2_AC_MODE \| ANX9804_RST_CTRL2_AUX);
148	i2c_reg_write(0x39, ANX9804_RST_CTRL2_REG,
149	ANX9804_RST_CTRL2_AC_MODE);
150
151	/* Powerdown audio and some other unused bits */
152	i2c_reg_write(0x39, ANX9804_POWERD_CTRL_REG, ANX9804_POWERD_AUDIO);
153	i2c_reg_write(0x38, ANX9804_HDCP_CONTROL_0_REG, 0x00);
154	i2c_reg_write(0x38, 0xa7, 0x00);
155
156	/* Set data-rate / lanes */
157	i2c_reg_write(0x38, ANX9804_LINK_BW_SET_REG, data_rate);
158	i2c_reg_write(0x38, ANX9804_LANE_COUNT_SET_REG, lanes);
159
160	/* Link training */
161	i2c_reg_write(0x38, ANX9804_LINK_TRAINING_CTRL_REG,
162	ANX9804_LINK_TRAINING_CTRL_EN);
163	mdelay(5);
164	for (i = 0; i < 100; i++) {
165	c = i2c_reg_read(0x38, ANX9804_LINK_TRAINING_CTRL_REG);
166	if ((c & 0x01) == 0)
167	break;
168
169	mdelay(5);
170	}
171	if(i == 100) {
172	printf("Error anx9804 link training timeout\n");
173	i2c_set_bus_num(orig_i2c_bus);
174	return;
175	}
176
177	/* Enable */
178	i2c_reg_write(0x39, ANX9804_VID_CTRL1_REG,
179	ANX9804_VID_CTRL1_VID_EN \| ANX9804_VID_CTRL1_EDGE);
180	/* Force stream valid */
181	i2c_reg_write(0x38, ANX9804_SYS_CTRL3_REG,
182	ANX9804_SYS_CTRL3_F_HPD \| ANX9804_SYS_CTRL3_HPD_CTRL \|
183	ANX9804_SYS_CTRL3_F_VALID \| ANX9804_SYS_CTRL3_VALID_CTRL);
184
185	i2c_set_bus_num(orig_i2c_bus);
186	}