drivers/gpu/drm/msm/hdmi/hdmi_phy_8x60.c

   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 };