1// SPDX-License-Identifier: MIT
  2/*
  3 * Copyright © 2022 Intel Corporation
  4 */
  5
  6#include "i915_drv.h"
  7#include "i915_reg.h"
  8
  9#include "intel_de.h"
 10#include "intel_display.h"
 11#include "intel_dkl_phy.h"
 12#include "intel_dkl_phy_regs.h"
 13
 14static void
 15dkl_phy_set_hip_idx(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg)
 16{
 17	enum tc_port tc_port = DKL_REG_TC_PORT(reg);
 18
 19	drm_WARN_ON(&i915->drm, tc_port < TC_PORT_1 || tc_port >= I915_MAX_TC_PORTS);
 20
 21	intel_de_write(i915,
 22		       HIP_INDEX_REG(tc_port),
 23		       HIP_INDEX_VAL(tc_port, reg.bank_idx));
 24}
 25
 26/**
 27 * intel_dkl_phy_read - read a Dekel PHY register
 28 * @i915: i915 device instance
 29 * @reg: Dekel PHY register
 30 *
 31 * Read the @reg Dekel PHY register.
 32 *
 33 * Returns the read value.
 34 */
 35u32
 36intel_dkl_phy_read(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg)
 37{
 38	u32 val;
 39
 40	spin_lock(&i915->display.dkl.phy_lock);
 41
 42	dkl_phy_set_hip_idx(i915, reg);
 43	val = intel_de_read(i915, DKL_REG_MMIO(reg));
 44
 45	spin_unlock(&i915->display.dkl.phy_lock);
 46
 47	return val;
 48}
 49
 50/**
 51 * intel_dkl_phy_write - write a Dekel PHY register
 52 * @i915: i915 device instance
 53 * @reg: Dekel PHY register
 54 * @val: value to write
 55 *
 56 * Write @val to the @reg Dekel PHY register.
 57 */
 58void
 59intel_dkl_phy_write(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg, u32 val)
 60{
 61	spin_lock(&i915->display.dkl.phy_lock);
 62
 63	dkl_phy_set_hip_idx(i915, reg);
 64	intel_de_write(i915, DKL_REG_MMIO(reg), val);
 65
 66	spin_unlock(&i915->display.dkl.phy_lock);
 67}
 68
 69/**
 70 * intel_dkl_phy_rmw - read-modify-write a Dekel PHY register
 71 * @i915: i915 device instance
 72 * @reg: Dekel PHY register
 73 * @clear: mask to clear
 74 * @set: mask to set
 75 *
 76 * Read the @reg Dekel PHY register, clearing then setting the @clear/@set bits in it, and writing
 77 * this value back to the register if the value differs from the read one.
 78 */
 79void
 80intel_dkl_phy_rmw(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg, u32 clear, u32 set)
 81{
 82	spin_lock(&i915->display.dkl.phy_lock);
 83
 84	dkl_phy_set_hip_idx(i915, reg);
 85	intel_de_rmw(i915, DKL_REG_MMIO(reg), clear, set);
 86
 87	spin_unlock(&i915->display.dkl.phy_lock);
 88}
 89
 90/**
 91 * intel_dkl_phy_posting_read - do a posting read from a Dekel PHY register
 92 * @i915: i915 device instance
 93 * @reg: Dekel PHY register
 94 *
 95 * Read the @reg Dekel PHY register without returning the read value.
 96 */
 97void
 98intel_dkl_phy_posting_read(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg)
 99{
100	spin_lock(&i915->display.dkl.phy_lock);
101
102	dkl_phy_set_hip_idx(i915, reg);
103	intel_de_posting_read(i915, DKL_REG_MMIO(reg));
104
105	spin_unlock(&i915->display.dkl.phy_lock);
106}