115 lines · c
1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2022 Intel Corporation4 */5 6#include "i915_drv.h"7 8#include "intel_de.h"9#include "intel_display.h"10#include "intel_dkl_phy.h"11#include "intel_dkl_phy_regs.h"12 13/**14 * intel_dkl_phy_init - initialize Dekel PHY15 * @i915: i915 device instance16 */17void intel_dkl_phy_init(struct drm_i915_private *i915)18{19 spin_lock_init(&i915->display.dkl.phy_lock);20}21 22static void23dkl_phy_set_hip_idx(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg)24{25 enum tc_port tc_port = DKL_REG_TC_PORT(reg);26 27 drm_WARN_ON(&i915->drm, tc_port < TC_PORT_1 || tc_port >= I915_MAX_TC_PORTS);28 29 intel_de_write(i915,30 HIP_INDEX_REG(tc_port),31 HIP_INDEX_VAL(tc_port, reg.bank_idx));32}33 34/**35 * intel_dkl_phy_read - read a Dekel PHY register36 * @i915: i915 device instance37 * @reg: Dekel PHY register38 *39 * Read the @reg Dekel PHY register.40 *41 * Returns the read value.42 */43u3244intel_dkl_phy_read(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg)45{46 u32 val;47 48 spin_lock(&i915->display.dkl.phy_lock);49 50 dkl_phy_set_hip_idx(i915, reg);51 val = intel_de_read(i915, DKL_REG_MMIO(reg));52 53 spin_unlock(&i915->display.dkl.phy_lock);54 55 return val;56}57 58/**59 * intel_dkl_phy_write - write a Dekel PHY register60 * @i915: i915 device instance61 * @reg: Dekel PHY register62 * @val: value to write63 *64 * Write @val to the @reg Dekel PHY register.65 */66void67intel_dkl_phy_write(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg, u32 val)68{69 spin_lock(&i915->display.dkl.phy_lock);70 71 dkl_phy_set_hip_idx(i915, reg);72 intel_de_write(i915, DKL_REG_MMIO(reg), val);73 74 spin_unlock(&i915->display.dkl.phy_lock);75}76 77/**78 * intel_dkl_phy_rmw - read-modify-write a Dekel PHY register79 * @i915: i915 device instance80 * @reg: Dekel PHY register81 * @clear: mask to clear82 * @set: mask to set83 *84 * Read the @reg Dekel PHY register, clearing then setting the @clear/@set bits in it, and writing85 * this value back to the register if the value differs from the read one.86 */87void88intel_dkl_phy_rmw(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg, u32 clear, u32 set)89{90 spin_lock(&i915->display.dkl.phy_lock);91 92 dkl_phy_set_hip_idx(i915, reg);93 intel_de_rmw(i915, DKL_REG_MMIO(reg), clear, set);94 95 spin_unlock(&i915->display.dkl.phy_lock);96}97 98/**99 * intel_dkl_phy_posting_read - do a posting read from a Dekel PHY register100 * @i915: i915 device instance101 * @reg: Dekel PHY register102 *103 * Read the @reg Dekel PHY register without returning the read value.104 */105void106intel_dkl_phy_posting_read(struct drm_i915_private *i915, struct intel_dkl_phy_reg reg)107{108 spin_lock(&i915->display.dkl.phy_lock);109 110 dkl_phy_set_hip_idx(i915, reg);111 intel_de_posting_read(i915, DKL_REG_MMIO(reg));112 113 spin_unlock(&i915->display.dkl.phy_lock);114}115