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// SPDX-License-Identifier: MIT
/*
* Copyright © 2022 Intel Corporation
*/
#include "i915_drv.h"
#include "i915_reg.h"
#include "intel_de.h"
#include "intel_display.h"
#include "intel_dkl_phy.h"
static void
dkl_phy_set_hip_idx(struct drm_i915_private *i915, i915_reg_t reg, int idx)
{
enum tc_port tc_port = DKL_REG_TC_PORT(reg);
drm_WARN_ON(&i915->drm, tc_port < TC_PORT_1 || tc_port >= I915_MAX_TC_PORTS);
intel_de_write(i915,
HIP_INDEX_REG(tc_port),
HIP_INDEX_VAL(tc_port, idx));
}
/**
* intel_dkl_phy_read - read a Dekel PHY register
* @i915: i915 device instance
* @reg: Dekel PHY register
* @ln: lane instance of @reg
*
* Read the @reg Dekel PHY register.
*
* Returns the read value.
*/
u32
intel_dkl_phy_read(struct drm_i915_private *i915, i915_reg_t reg, int ln)
{
u32 val;
spin_lock(&i915->display.dkl.phy_lock);
dkl_phy_set_hip_idx(i915, reg, ln);
val = intel_de_read(i915, reg);
spin_unlock(&i915->display.dkl.phy_lock);
return val;
}
/**
* intel_dkl_phy_write - write a Dekel PHY register
* @i915: i915 device instance
* @reg: Dekel PHY register
* @ln: lane instance of @reg
* @val: value to write
*
* Write @val to the @reg Dekel PHY register.
*/
void
intel_dkl_phy_write(struct drm_i915_private *i915, i915_reg_t reg, int ln, u32 val)
{
spin_lock(&i915->display.dkl.phy_lock);
dkl_phy_set_hip_idx(i915, reg, ln);
intel_de_write(i915, reg, val);
spin_unlock(&i915->display.dkl.phy_lock);
}
/**
* intel_dkl_phy_rmw - read-modify-write a Dekel PHY register
* @i915: i915 device instance
* @reg: Dekel PHY register
* @ln: lane instance of @reg
* @clear: mask to clear
* @set: mask to set
*
* Read the @reg Dekel PHY register, clearing then setting the @clear/@set bits in it, and writing
* this value back to the register if the value differs from the read one.
*/
void
intel_dkl_phy_rmw(struct drm_i915_private *i915, i915_reg_t reg, int ln, u32 clear, u32 set)
{
spin_lock(&i915->display.dkl.phy_lock);
dkl_phy_set_hip_idx(i915, reg, ln);
intel_de_rmw(i915, reg, clear, set);
spin_unlock(&i915->display.dkl.phy_lock);
}
/**
* intel_dkl_phy_posting_read - do a posting read from a Dekel PHY register
* @i915: i915 device instance
* @reg: Dekel PHY register
* @ln: lane instance of @reg
*
* Read the @reg Dekel PHY register without returning the read value.
*/
void
intel_dkl_phy_posting_read(struct drm_i915_private *i915, i915_reg_t reg, int ln)
{
spin_lock(&i915->display.dkl.phy_lock);
dkl_phy_set_hip_idx(i915, reg, ln);
intel_de_posting_read(i915, reg);
spin_unlock(&i915->display.dkl.phy_lock);
}
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