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 
11 static 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 		       HDMI_8x60_PHY_REG0_DESER_DEL_CTRL(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 			       HDMI_8x60_PHY_REG1_DTEST_MUX_SEL(5) |
22 			       HDMI_8x60_PHY_REG1_OUTVOL_SWING_CTRL(3));
23 	} else {
24 		hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG1,
25 			       HDMI_8x60_PHY_REG1_DTEST_MUX_SEL(5) |
26 			       HDMI_8x60_PHY_REG1_OUTVOL_SWING_CTRL(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, 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, 0);
80 	hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG5, 0);
81 	hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG6, 0);
82 	hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG7, 0);
83 	hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG8, 0);
84 	hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG9, 0);
85 	hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG10, 0);
86 	hdmi_phy_write(phy, REG_HDMI_8x60_PHY_REG11, 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 
95 static 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, 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, 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 
125 const struct hdmi_phy_cfg msm_hdmi_phy_8x60_cfg = {
126 	.type = MSM_HDMI_PHY_8x60,
127 	.powerup = hdmi_phy_8x60_powerup,
128 	.powerdown = hdmi_phy_8x60_powerdown,
129 };
130