1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <linux/delay.h>
8
9#include "hdmi.h"
10
11static void hdmi_phy_8x60_powerup(struct hdmi_phy *phy,
12 unsigned long int pixclock)
13{
14 /* De-serializer delay D/C for non-lbk mode: */
15 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG0,
16 data: HDMI_8x60_PHY_REG0_DESER_DEL_CTRL(val: 3));
17
18 if (pixclock == 27000000) {
19 /* video_format == HDMI_VFRMT_720x480p60_16_9 */
20 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG1,
21 data: HDMI_8x60_PHY_REG1_DTEST_MUX_SEL(val: 5) |
22 HDMI_8x60_PHY_REG1_OUTVOL_SWING_CTRL(val: 3));
23 } else {
24 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG1,
25 data: HDMI_8x60_PHY_REG1_DTEST_MUX_SEL(val: 5) |
26 HDMI_8x60_PHY_REG1_OUTVOL_SWING_CTRL(val: 4));
27 }
28
29 /* No matter what, start from the power down mode: */
30 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG2,
31 HDMI_8x60_PHY_REG2_PD_PWRGEN |
32 HDMI_8x60_PHY_REG2_PD_PLL |
33 HDMI_8x60_PHY_REG2_PD_DRIVE_4 |
34 HDMI_8x60_PHY_REG2_PD_DRIVE_3 |
35 HDMI_8x60_PHY_REG2_PD_DRIVE_2 |
36 HDMI_8x60_PHY_REG2_PD_DRIVE_1 |
37 HDMI_8x60_PHY_REG2_PD_DESER);
38
39 /* Turn PowerGen on: */
40 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG2,
41 HDMI_8x60_PHY_REG2_PD_PLL |
42 HDMI_8x60_PHY_REG2_PD_DRIVE_4 |
43 HDMI_8x60_PHY_REG2_PD_DRIVE_3 |
44 HDMI_8x60_PHY_REG2_PD_DRIVE_2 |
45 HDMI_8x60_PHY_REG2_PD_DRIVE_1 |
46 HDMI_8x60_PHY_REG2_PD_DESER);
47
48 /* Turn PLL power on: */
49 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG2,
50 HDMI_8x60_PHY_REG2_PD_DRIVE_4 |
51 HDMI_8x60_PHY_REG2_PD_DRIVE_3 |
52 HDMI_8x60_PHY_REG2_PD_DRIVE_2 |
53 HDMI_8x60_PHY_REG2_PD_DRIVE_1 |
54 HDMI_8x60_PHY_REG2_PD_DESER);
55
56 /* Write to HIGH after PLL power down de-assert: */
57 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG3,
58 HDMI_8x60_PHY_REG3_PLL_ENABLE);
59
60 /* ASIC power on; PHY REG9 = 0 */
61 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG9, data: 0);
62
63 /* Enable PLL lock detect, PLL lock det will go high after lock
64 * Enable the re-time logic
65 */
66 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG12,
67 HDMI_8x60_PHY_REG12_RETIMING_EN |
68 HDMI_8x60_PHY_REG12_PLL_LOCK_DETECT_EN);
69
70 /* Drivers are on: */
71 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG2,
72 HDMI_8x60_PHY_REG2_PD_DESER);
73
74 /* If the RX detector is needed: */
75 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG2,
76 HDMI_8x60_PHY_REG2_RCV_SENSE_EN |
77 HDMI_8x60_PHY_REG2_PD_DESER);
78
79 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG4, data: 0);
80 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG5, data: 0);
81 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG6, data: 0);
82 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG7, data: 0);
83 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG8, data: 0);
84 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG9, data: 0);
85 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG10, data: 0);
86 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG11, data: 0);
87
88 /* If we want to use lock enable based on counting: */
89 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG12,
90 HDMI_8x60_PHY_REG12_RETIMING_EN |
91 HDMI_8x60_PHY_REG12_PLL_LOCK_DETECT_EN |
92 HDMI_8x60_PHY_REG12_FORCE_LOCK);
93}
94
95static void hdmi_phy_8x60_powerdown(struct hdmi_phy *phy)
96{
97 /* Assert RESET PHY from controller */
98 hdmi_phy_write(phy, REG_HDMI_PHY_CTRL,
99 HDMI_PHY_CTRL_SW_RESET);
100 udelay(10);
101 /* De-assert RESET PHY from controller */
102 hdmi_phy_write(phy, REG_HDMI_PHY_CTRL, data: 0);
103 /* Turn off Driver */
104 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG2,
105 HDMI_8x60_PHY_REG2_PD_DRIVE_4 |
106 HDMI_8x60_PHY_REG2_PD_DRIVE_3 |
107 HDMI_8x60_PHY_REG2_PD_DRIVE_2 |
108 HDMI_8x60_PHY_REG2_PD_DRIVE_1 |
109 HDMI_8x60_PHY_REG2_PD_DESER);
110 udelay(10);
111 /* Disable PLL */
112 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG3, data: 0);
113 /* Power down PHY, but keep RX-sense: */
114 hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG2,
115 HDMI_8x60_PHY_REG2_RCV_SENSE_EN |
116 HDMI_8x60_PHY_REG2_PD_PWRGEN |
117 HDMI_8x60_PHY_REG2_PD_PLL |
118 HDMI_8x60_PHY_REG2_PD_DRIVE_4 |
119 HDMI_8x60_PHY_REG2_PD_DRIVE_3 |
120 HDMI_8x60_PHY_REG2_PD_DRIVE_2 |
121 HDMI_8x60_PHY_REG2_PD_DRIVE_1 |
122 HDMI_8x60_PHY_REG2_PD_DESER);
123}
124
125static const char * const hdmi_phy_8x60_reg_names[] = {
126 "core-vdda",
127};
128
129static const char * const hdmi_phy_8x60_clk_names[] = {
130 "slave_iface",
131};
132
133const struct hdmi_phy_cfg msm_hdmi_phy_8x60_cfg = {
134 .type = MSM_HDMI_PHY_8x60,
135 .powerup = hdmi_phy_8x60_powerup,
136 .powerdown = hdmi_phy_8x60_powerdown,
137 .reg_names = hdmi_phy_8x60_reg_names,
138 .num_regs = ARRAY_SIZE(hdmi_phy_8x60_reg_names),
139 .clk_names = hdmi_phy_8x60_clk_names,
140 .num_clks = ARRAY_SIZE(hdmi_phy_8x60_clk_names),
141};
142

source code of linux/drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c