// SPDX-License-Identifier: MIT
/*
* Copyright © 2018 Intel Corporation
*/
#include "intel_drv.h"
#define for_each_combo_port(__dev_priv, __port) \
for ((__port) = PORT_A; (__port) < I915_MAX_PORTS; (__port)++) \
for_each_if(intel_port_is_combophy(__dev_priv, __port))
#define for_each_combo_port_reverse(__dev_priv, __port) \
for ((__port) = I915_MAX_PORTS; (__port)-- > PORT_A;) \
for_each_if(intel_port_is_combophy(__dev_priv, __port))
enum {
PROCMON_0_85V_DOT_0,
PROCMON_0_95V_DOT_0,
PROCMON_0_95V_DOT_1,
PROCMON_1_05V_DOT_0,
PROCMON_1_05V_DOT_1,
};
static const struct cnl_procmon {
u32 dw1, dw9, dw10;
} cnl_procmon_values[] = {
[PROCMON_0_85V_DOT_0] =
{ .dw1 = 0x00000000, .dw9 = 0x62AB67BB, .dw10 = 0x51914F96, },
[PROCMON_0_95V_DOT_0] =
{ .dw1 = 0x00000000, .dw9 = 0x86E172C7, .dw10 = 0x77CA5EAB, },
[PROCMON_0_95V_DOT_1] =
{ .dw1 = 0x00000000, .dw9 = 0x93F87FE1, .dw10 = 0x8AE871C5, },
[PROCMON_1_05V_DOT_0] =
{ .dw1 = 0x00000000, .dw9 = 0x98FA82DD, .dw10 = 0x89E46DC1, },
[PROCMON_1_05V_DOT_1] =
{ .dw1 = 0x00440000, .dw9 = 0x9A00AB25, .dw10 = 0x8AE38FF1, },
};
/*
* CNL has just one set of registers, while ICL has two sets: one for port A and
* the other for port B. The CNL registers are equivalent to the ICL port A
* registers, that's why we call the ICL macros even though the function has CNL
* on its name.
*/
static const struct cnl_procmon *
cnl_get_procmon_ref_values(struct drm_i915_private *dev_priv, enum port port)
{
const struct cnl_procmon *procmon;
u32 val;
val = I915_READ(ICL_PORT_COMP_DW3(port));
switch (val & (PROCESS_INFO_MASK | VOLTAGE_INFO_MASK)) {
default:
MISSING_CASE(val);
/* fall through */
case VOLTAGE_INFO_0_85V | PROCESS_INFO_DOT_0:
procmon = &cnl_procmon_values[PROCMON_0_85V_DOT_0];
break;
case VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_0:
procmon = &cnl_procmon_values[PROCMON_0_95V_DOT_0];
break;
case VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_1:
procmon = &cnl_procmon_values[PROCMON_0_95V_DOT_1];
break;
case VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_0:
procmon = &cnl_procmon_values[PROCMON_1_05V_DOT_0];
break;
case VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_1:
procmon = &cnl_procmon_values[PROCMON_1_05V_DOT_1];
break;
}
return procmon;
}
static void cnl_set_procmon_ref_values(struct drm_i915_private *dev_priv,
enum port port)
{
const struct cnl_procmon *procmon;
u32 val;
procmon = cnl_get_procmon_ref_values(dev_priv, port);
val = I915_READ(ICL_PORT_COMP_DW1(port));
val &= ~((0xff << 16) | 0xff);
val |= procmon->dw1;
I915_WRITE(ICL_PORT_COMP_DW1(port), val);
I915_WRITE(ICL_PORT_COMP_DW9(port), procmon->dw9);
I915_WRITE(ICL_PORT_COMP_DW10(port), procmon->dw10);
}
static bool check_phy_reg(struct drm_i915_private *dev_priv,
enum port port, i915_reg_t reg, u32 mask,
u32 expected_val)
{
u32 val = I915_READ(reg);
if ((val & mask) != expected_val) {
DRM_DEBUG_DRIVER("Port %c combo PHY reg %08x state mismatch: "
"current %08x mask %08x expected %08x\n",
port_name(port),
reg.reg, val, mask, expected_val);
return false;
}
return true;
}
static bool cnl_verify_procmon_ref_values(struct drm_i915_private *dev_priv,
enum port port)
{
const struct cnl_procmon *procmon;
bool ret;
procmon = cnl_get_procmon_ref_values(dev_priv, port);
ret = check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW1(port),
(0xff << 16) | 0xff, procmon->dw1);
ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW9(port),
-1U, procmon->dw9);
ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW10(port),
-1U, procmon->dw10);
return ret;
}
static bool cnl_combo_phy_enabled(struct drm_i915_private *dev_priv)
{
return !(I915_READ(CHICKEN_MISC_2) & CNL_COMP_PWR_DOWN) &&
(I915_READ(CNL_PORT_COMP_DW0) & COMP_INIT);
}
static bool cnl_combo_phy_verify_state(struct drm_i915_private *dev_priv)
{
enum port port = PORT_A;
bool ret;
if (!cnl_combo_phy_enabled(dev_priv))
return false;
ret = cnl_verify_procmon_ref_values(dev_priv, port);
ret &= check_phy_reg(dev_priv, port, CNL_PORT_CL1CM_DW5,
CL_POWER_DOWN_ENABLE, CL_POWER_DOWN_ENABLE);
return ret;
}
void cnl_combo_phys_init(struct drm_i915_private *dev_priv)
{
u32 val;
val = I915_READ(CHICKEN_MISC_2);
val &= ~CNL_COMP_PWR_DOWN;
I915_WRITE(CHICKEN_MISC_2, val);
/* Dummy PORT_A to get the correct CNL register from the ICL macro */
cnl_set_procmon_ref_values(dev_priv, PORT_A);
val = I915_READ(CNL_PORT_COMP_DW0);
val |= COMP_INIT;
I915_WRITE(CNL_PORT_COMP_DW0, val);
val = I915_READ(CNL_PORT_CL1CM_DW5);
val |= CL_POWER_DOWN_ENABLE;
I915_WRITE(CNL_PORT_CL1CM_DW5, val);
}
void cnl_combo_phys_uninit(struct drm_i915_private *dev_priv)
{
u32 val;
if (!cnl_combo_phy_verify_state(dev_priv))
DRM_WARN("Combo PHY HW state changed unexpectedly.\n");
val = I915_READ(CHICKEN_MISC_2);
val |= CNL_COMP_PWR_DOWN;
I915_WRITE(CHICKEN_MISC_2, val);
}
static bool icl_combo_phy_enabled(struct drm_i915_private *dev_priv,
enum port port)
{
return !(I915_READ(ICL_PHY_MISC(port)) &
ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN) &&
(I915_READ(ICL_PORT_COMP_DW0(port)) & COMP_INIT);
}
static bool icl_combo_phy_verify_state(struct drm_i915_private *dev_priv,
enum port port)
{
bool ret;
if (!icl_combo_phy_enabled(dev_priv, port))
return false;
ret = cnl_verify_procmon_ref_values(dev_priv, port);
ret &= check_phy_reg(dev_priv, port, ICL_PORT_CL_DW5(port),
CL_POWER_DOWN_ENABLE, CL_POWER_DOWN_ENABLE);
return ret;
}
void icl_combo_phys_init(struct drm_i915_private *dev_priv)
{
enum port port;
for_each_combo_port(dev_priv, port) {
u32 val;
if (icl_combo_phy_verify_state(dev_priv, port)) {
DRM_DEBUG_DRIVER("Port %c combo PHY already enabled, won't reprogram it.\n",
port_name(port));
continue;
}
val = I915_READ(ICL_PHY_MISC(port));
val &= ~ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;
I915_WRITE(ICL_PHY_MISC(port), val);
cnl_set_procmon_ref_values(dev_priv, port);
val = I915_READ(ICL_PORT_COMP_DW0(port));
val |= COMP_INIT;
I915_WRITE(ICL_PORT_COMP_DW0(port), val);
val = I915_READ(ICL_PORT_CL_DW5(port));
val |= CL_POWER_DOWN_ENABLE;
I915_WRITE(ICL_PORT_CL_DW5(port), val);
}
}
void icl_combo_phys_uninit(struct drm_i915_private *dev_priv)
{
enum port port;
for_each_combo_port_reverse(dev_priv, port) {
u32 val;
if (port == PORT_A &&
!icl_combo_phy_verify_state(dev_priv, port))
DRM_WARN("Port %c combo PHY HW state changed unexpectedly\n",
port_name(port));
val = I915_READ(ICL_PHY_MISC(port));
val |= ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;
I915_WRITE(ICL_PHY_MISC(port), val);
val = I915_READ(ICL_PORT_COMP_DW0(port));
val &= ~COMP_INIT;
I915_WRITE(ICL_PORT_COMP_DW0(port), val);
}
}
