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linux_dsm_epyc7002/drivers/gpu/drm/i915/intel_runtime_pm.c
Jesse Barnes 165ed87c47 drm/i915: fixup runtime PM handling v2 
According to the PCI docs and Rafael, we don't need to be doing explicit
enables and disables in our init and teardown routines, as they're taken
care of by the PCI core.  So drop the pm_runtime_disable() at teardown
and pm_runtime_set_active() at init.

This fixes one failure of the basic-pci-d3-state test on my BYT.

v2: drop extra get_noresume() and put_noidle() (Rafael)

Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-09-30 10:20:01 +02:00

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/*
* Copyright © 2012-2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eugeni Dodonov <eugeni.dodonov@intel.com>
* Daniel Vetter <daniel.vetter@ffwll.ch>
*
*/
#include <linux/pm_runtime.h>
#include <linux/vgaarb.h>
#include "i915_drv.h"
#include "intel_drv.h"
/**
* DOC: runtime pm
*
* The i915 driver supports dynamic enabling and disabling of entire hardware
* blocks at runtime. This is especially important on the display side where
* software is supposed to control many power gates manually on recent hardware,
* since on the GT side a lot of the power management is done by the hardware.
* But even there some manual control at the device level is required.
*
* Since i915 supports a diverse set of platforms with a unified codebase and
* hardware engineers just love to shuffle functionality around between power
* domains there's a sizeable amount of indirection required. This file provides
* generic functions to the driver for grabbing and releasing references for
* abstract power domains. It then maps those to the actual power wells
* present for a given platform.
*/
#define GEN9_ENABLE_DC5(dev) 0
#define SKL_ENABLE_DC6(dev) IS_SKYLAKE(dev)
#define for_each_power_well(i, power_well, domain_mask, power_domains) \
for (i = 0; \
i < (power_domains)->power_well_count && \
((power_well) = &(power_domains)->power_wells[i]); \
i++) \
if ((power_well)->domains & (domain_mask))
#define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \
for (i = (power_domains)->power_well_count - 1; \
i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\
i--) \
if ((power_well)->domains & (domain_mask))
bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
int power_well_id);
static void intel_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
DRM_DEBUG_KMS("enabling %s\n", power_well->name);
power_well->ops->enable(dev_priv, power_well);
power_well->hw_enabled = true;
}
static void intel_power_well_disable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
DRM_DEBUG_KMS("disabling %s\n", power_well->name);
power_well->hw_enabled = false;
power_well->ops->disable(dev_priv, power_well);
}
/*
* We should only use the power well if we explicitly asked the hardware to
* enable it, so check if it's enabled and also check if we've requested it to
* be enabled.
*/
static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
return I915_READ(HSW_PWR_WELL_DRIVER) ==
(HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED);
}
/**
* __intel_display_power_is_enabled - unlocked check for a power domain
* @dev_priv: i915 device instance
* @domain: power domain to check
*
* This is the unlocked version of intel_display_power_is_enabled() and should
* only be used from error capture and recovery code where deadlocks are
* possible.
*
* Returns:
* True when the power domain is enabled, false otherwise.
*/
bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
enum intel_display_power_domain domain)
{
struct i915_power_domains *power_domains;
struct i915_power_well *power_well;
bool is_enabled;
int i;
if (dev_priv->pm.suspended)
return false;
power_domains = &dev_priv->power_domains;
is_enabled = true;
for_each_power_well_rev(i, power_well, BIT(domain), power_domains) {
if (power_well->always_on)
continue;
if (!power_well->hw_enabled) {
is_enabled = false;
break;
}
}
return is_enabled;
}
/**
* intel_display_power_is_enabled - check for a power domain
* @dev_priv: i915 device instance
* @domain: power domain to check
*
* This function can be used to check the hw power domain state. It is mostly
* used in hardware state readout functions. Everywhere else code should rely
* upon explicit power domain reference counting to ensure that the hardware
* block is powered up before accessing it.
*
* Callers must hold the relevant modesetting locks to ensure that concurrent
* threads can't disable the power well while the caller tries to read a few
* registers.
*
* Returns:
* True when the power domain is enabled, false otherwise.
*/
bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
enum intel_display_power_domain domain)
{
struct i915_power_domains *power_domains;
bool ret;
power_domains = &dev_priv->power_domains;
mutex_lock(&power_domains->lock);
ret = __intel_display_power_is_enabled(dev_priv, domain);
mutex_unlock(&power_domains->lock);
return ret;
}
/**
* intel_display_set_init_power - set the initial power domain state
* @dev_priv: i915 device instance
* @enable: whether to enable or disable the initial power domain state
*
* For simplicity our driver load/unload and system suspend/resume code assumes
* that all power domains are always enabled. This functions controls the state
* of this little hack. While the initial power domain state is enabled runtime
* pm is effectively disabled.
*/
void intel_display_set_init_power(struct drm_i915_private *dev_priv,
bool enable)
{
if (dev_priv->power_domains.init_power_on == enable)
return;
if (enable)
intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
else
intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
dev_priv->power_domains.init_power_on = enable;
}
/*
* Starting with Haswell, we have a "Power Down Well" that can be turned off
* when not needed anymore. We have 4 registers that can request the power well
* to be enabled, and it will only be disabled if none of the registers is
* requesting it to be enabled.
*/
static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
/*
* After we re-enable the power well, if we touch VGA register 0x3d5
* we'll get unclaimed register interrupts. This stops after we write
* anything to the VGA MSR register. The vgacon module uses this
* register all the time, so if we unbind our driver and, as a
* consequence, bind vgacon, we'll get stuck in an infinite loop at
* console_unlock(). So make here we touch the VGA MSR register, making
* sure vgacon can keep working normally without triggering interrupts
* and error messages.
*/
vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
if (IS_BROADWELL(dev))
gen8_irq_power_well_post_enable(dev_priv,
1 << PIPE_C | 1 << PIPE_B);
}
static void skl_power_well_post_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
struct drm_device *dev = dev_priv->dev;
/*
* After we re-enable the power well, if we touch VGA register 0x3d5
* we'll get unclaimed register interrupts. This stops after we write
* anything to the VGA MSR register. The vgacon module uses this
* register all the time, so if we unbind our driver and, as a
* consequence, bind vgacon, we'll get stuck in an infinite loop at
* console_unlock(). So make here we touch the VGA MSR register, making
* sure vgacon can keep working normally without triggering interrupts
* and error messages.
*/
if (power_well->data == SKL_DISP_PW_2) {
vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
gen8_irq_power_well_post_enable(dev_priv,
1 << PIPE_C | 1 << PIPE_B);
}
if (power_well->data == SKL_DISP_PW_1) {
intel_prepare_ddi(dev);
gen8_irq_power_well_post_enable(dev_priv, 1 << PIPE_A);
}
}
static void hsw_set_power_well(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well, bool enable)
{
bool is_enabled, enable_requested;
uint32_t tmp;
tmp = I915_READ(HSW_PWR_WELL_DRIVER);
is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED;
enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST;
if (enable) {
if (!enable_requested)
I915_WRITE(HSW_PWR_WELL_DRIVER,
HSW_PWR_WELL_ENABLE_REQUEST);
if (!is_enabled) {
DRM_DEBUG_KMS("Enabling power well\n");
if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
HSW_PWR_WELL_STATE_ENABLED), 20))
DRM_ERROR("Timeout enabling power well\n");
hsw_power_well_post_enable(dev_priv);
}
} else {
if (enable_requested) {
I915_WRITE(HSW_PWR_WELL_DRIVER, 0);
POSTING_READ(HSW_PWR_WELL_DRIVER);
DRM_DEBUG_KMS("Requesting to disable the power well\n");
}
}
}
#define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_TRANSCODER_A) | \
BIT(POWER_DOMAIN_PIPE_B) | \
BIT(POWER_DOMAIN_TRANSCODER_B) | \
BIT(POWER_DOMAIN_PIPE_C) | \
BIT(POWER_DOMAIN_TRANSCODER_C) | \
BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_E_2_LANES) | \
BIT(POWER_DOMAIN_AUX_B) | \
BIT(POWER_DOMAIN_AUX_C) | \
BIT(POWER_DOMAIN_AUX_D) | \
BIT(POWER_DOMAIN_AUDIO) | \
BIT(POWER_DOMAIN_VGA) | \
BIT(POWER_DOMAIN_INIT))
#define SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS ( \
SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
BIT(POWER_DOMAIN_PLLS) | \
BIT(POWER_DOMAIN_PIPE_A) | \
BIT(POWER_DOMAIN_TRANSCODER_EDP) | \
BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \
BIT(POWER_DOMAIN_AUX_A) | \
BIT(POWER_DOMAIN_INIT))
#define SKL_DISPLAY_DDI_A_E_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_E_2_LANES) | \
BIT(POWER_DOMAIN_INIT))
#define SKL_DISPLAY_DDI_B_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
BIT(POWER_DOMAIN_INIT))
#define SKL_DISPLAY_DDI_C_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
BIT(POWER_DOMAIN_INIT))
#define SKL_DISPLAY_DDI_D_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \
BIT(POWER_DOMAIN_INIT))
#define SKL_DISPLAY_MISC_IO_POWER_DOMAINS ( \
SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS | \
BIT(POWER_DOMAIN_PLLS) | \
BIT(POWER_DOMAIN_INIT))
#define SKL_DISPLAY_ALWAYS_ON_POWER_DOMAINS ( \
(POWER_DOMAIN_MASK & ~(SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS | \
SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
SKL_DISPLAY_DDI_A_E_POWER_DOMAINS | \
SKL_DISPLAY_DDI_B_POWER_DOMAINS | \
SKL_DISPLAY_DDI_C_POWER_DOMAINS | \
SKL_DISPLAY_DDI_D_POWER_DOMAINS | \
SKL_DISPLAY_MISC_IO_POWER_DOMAINS)) | \
BIT(POWER_DOMAIN_INIT))
#define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_TRANSCODER_A) | \
BIT(POWER_DOMAIN_PIPE_B) | \
BIT(POWER_DOMAIN_TRANSCODER_B) | \
BIT(POWER_DOMAIN_PIPE_C) | \
BIT(POWER_DOMAIN_TRANSCODER_C) | \
BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
BIT(POWER_DOMAIN_AUX_B) | \
BIT(POWER_DOMAIN_AUX_C) | \
BIT(POWER_DOMAIN_AUDIO) | \
BIT(POWER_DOMAIN_VGA) | \
BIT(POWER_DOMAIN_INIT))
#define BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS ( \
BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
BIT(POWER_DOMAIN_PIPE_A) | \
BIT(POWER_DOMAIN_TRANSCODER_EDP) | \
BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \
BIT(POWER_DOMAIN_AUX_A) | \
BIT(POWER_DOMAIN_PLLS) | \
BIT(POWER_DOMAIN_INIT))
#define BXT_DISPLAY_ALWAYS_ON_POWER_DOMAINS ( \
(POWER_DOMAIN_MASK & ~(BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS | \
BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS)) | \
BIT(POWER_DOMAIN_INIT))
static void assert_can_enable_dc9(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
WARN(!IS_BROXTON(dev), "Platform doesn't support DC9.\n");
WARN((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9),
"DC9 already programmed to be enabled.\n");
WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
"DC5 still not disabled to enable DC9.\n");
WARN(I915_READ(HSW_PWR_WELL_DRIVER), "Power well on.\n");
WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n");
/*
* TODO: check for the following to verify the conditions to enter DC9
* state are satisfied:
* 1] Check relevant display engine registers to verify if mode set
* disable sequence was followed.
* 2] Check if display uninitialize sequence is initialized.
*/
}
static void assert_can_disable_dc9(struct drm_i915_private *dev_priv)
{
WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n");
WARN(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9),
"DC9 already programmed to be disabled.\n");
WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
"DC5 still not disabled.\n");
/*
* TODO: check for the following to verify DC9 state was indeed
* entered before programming to disable it:
* 1] Check relevant display engine registers to verify if mode
* set disable sequence was followed.
* 2] Check if display uninitialize sequence is initialized.
*/
}
void bxt_enable_dc9(struct drm_i915_private *dev_priv)
{
uint32_t val;
assert_can_enable_dc9(dev_priv);
DRM_DEBUG_KMS("Enabling DC9\n");
val = I915_READ(DC_STATE_EN);
val |= DC_STATE_EN_DC9;
I915_WRITE(DC_STATE_EN, val);
POSTING_READ(DC_STATE_EN);
}
void bxt_disable_dc9(struct drm_i915_private *dev_priv)
{
uint32_t val;
assert_can_disable_dc9(dev_priv);
DRM_DEBUG_KMS("Disabling DC9\n");
val = I915_READ(DC_STATE_EN);
val &= ~DC_STATE_EN_DC9;
I915_WRITE(DC_STATE_EN, val);
POSTING_READ(DC_STATE_EN);
}
static void gen9_set_dc_state_debugmask_memory_up(
struct drm_i915_private *dev_priv)
{
uint32_t val;
/* The below bit doesn't need to be cleared ever afterwards */
val = I915_READ(DC_STATE_DEBUG);
if (!(val & DC_STATE_DEBUG_MASK_MEMORY_UP)) {
val |= DC_STATE_DEBUG_MASK_MEMORY_UP;
I915_WRITE(DC_STATE_DEBUG, val);
POSTING_READ(DC_STATE_DEBUG);
}
}
static void assert_can_enable_dc5(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv,
SKL_DISP_PW_2);
WARN_ONCE(!IS_SKYLAKE(dev), "Platform doesn't support DC5.\n");
WARN_ONCE(!HAS_RUNTIME_PM(dev), "Runtime PM not enabled.\n");
WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n");
WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5),
"DC5 already programmed to be enabled.\n");
WARN_ONCE(dev_priv->pm.suspended,
"DC5 cannot be enabled, if platform is runtime-suspended.\n");
assert_csr_loaded(dev_priv);
}
static void assert_can_disable_dc5(struct drm_i915_private *dev_priv)
{
bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv,
SKL_DISP_PW_2);
/*
* During initialization, the firmware may not be loaded yet.
* We still want to make sure that the DC enabling flag is cleared.
*/
if (dev_priv->power_domains.initializing)
return;
WARN_ONCE(!pg2_enabled, "PG2 not enabled to disable DC5.\n");
WARN_ONCE(dev_priv->pm.suspended,
"Disabling of DC5 while platform is runtime-suspended should never happen.\n");
}
static void gen9_enable_dc5(struct drm_i915_private *dev_priv)
{
uint32_t val;
assert_can_enable_dc5(dev_priv);
DRM_DEBUG_KMS("Enabling DC5\n");
gen9_set_dc_state_debugmask_memory_up(dev_priv);
val = I915_READ(DC_STATE_EN);
val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK;
val |= DC_STATE_EN_UPTO_DC5;
I915_WRITE(DC_STATE_EN, val);
POSTING_READ(DC_STATE_EN);
}
static void gen9_disable_dc5(struct drm_i915_private *dev_priv)
{
uint32_t val;
assert_can_disable_dc5(dev_priv);
DRM_DEBUG_KMS("Disabling DC5\n");
val = I915_READ(DC_STATE_EN);
val &= ~DC_STATE_EN_UPTO_DC5;
I915_WRITE(DC_STATE_EN, val);
POSTING_READ(DC_STATE_EN);
}
static void assert_can_enable_dc6(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
WARN_ONCE(!IS_SKYLAKE(dev), "Platform doesn't support DC6.\n");
WARN_ONCE(!HAS_RUNTIME_PM(dev), "Runtime PM not enabled.\n");
WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
"Backlight is not disabled.\n");
WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6),
"DC6 already programmed to be enabled.\n");
assert_csr_loaded(dev_priv);
}
static void assert_can_disable_dc6(struct drm_i915_private *dev_priv)
{
/*
* During initialization, the firmware may not be loaded yet.
* We still want to make sure that the DC enabling flag is cleared.
*/
if (dev_priv->power_domains.initializing)
return;
assert_csr_loaded(dev_priv);
WARN_ONCE(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6),
"DC6 already programmed to be disabled.\n");
}
static void skl_enable_dc6(struct drm_i915_private *dev_priv)
{
uint32_t val;
assert_can_enable_dc6(dev_priv);
DRM_DEBUG_KMS("Enabling DC6\n");
gen9_set_dc_state_debugmask_memory_up(dev_priv);
val = I915_READ(DC_STATE_EN);
val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK;
val |= DC_STATE_EN_UPTO_DC6;
I915_WRITE(DC_STATE_EN, val);
POSTING_READ(DC_STATE_EN);
}
static void skl_disable_dc6(struct drm_i915_private *dev_priv)
{
uint32_t val;
assert_can_disable_dc6(dev_priv);
DRM_DEBUG_KMS("Disabling DC6\n");
val = I915_READ(DC_STATE_EN);
val &= ~DC_STATE_EN_UPTO_DC6;
I915_WRITE(DC_STATE_EN, val);
POSTING_READ(DC_STATE_EN);
}
static void skl_set_power_well(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well, bool enable)
{
struct drm_device *dev = dev_priv->dev;
uint32_t tmp, fuse_status;
uint32_t req_mask, state_mask;
bool is_enabled, enable_requested, check_fuse_status = false;
tmp = I915_READ(HSW_PWR_WELL_DRIVER);
fuse_status = I915_READ(SKL_FUSE_STATUS);
switch (power_well->data) {
case SKL_DISP_PW_1:
if (wait_for((I915_READ(SKL_FUSE_STATUS) &
SKL_FUSE_PG0_DIST_STATUS), 1)) {
DRM_ERROR("PG0 not enabled\n");
return;
}
break;
case SKL_DISP_PW_2:
if (!(fuse_status & SKL_FUSE_PG1_DIST_STATUS)) {
DRM_ERROR("PG1 in disabled state\n");
return;
}
break;
case SKL_DISP_PW_DDI_A_E:
case SKL_DISP_PW_DDI_B:
case SKL_DISP_PW_DDI_C:
case SKL_DISP_PW_DDI_D:
case SKL_DISP_PW_MISC_IO:
break;
default:
WARN(1, "Unknown power well %lu\n", power_well->data);
return;
}
req_mask = SKL_POWER_WELL_REQ(power_well->data);
enable_requested = tmp & req_mask;
state_mask = SKL_POWER_WELL_STATE(power_well->data);
is_enabled = tmp & state_mask;
if (enable) {
if (!enable_requested) {
WARN((tmp & state_mask) &&
!I915_READ(HSW_PWR_WELL_BIOS),
"Invalid for power well status to be enabled, unless done by the BIOS, \
when request is to disable!\n");
if ((GEN9_ENABLE_DC5(dev) || SKL_ENABLE_DC6(dev)) &&
power_well->data == SKL_DISP_PW_2) {
if (SKL_ENABLE_DC6(dev)) {
skl_disable_dc6(dev_priv);
/*
* DDI buffer programming unnecessary during driver-load/resume
* as it's already done during modeset initialization then.
* It's also invalid here as encoder list is still uninitialized.
*/
if (!dev_priv->power_domains.initializing)
intel_prepare_ddi(dev);
} else {
gen9_disable_dc5(dev_priv);
}
}
I915_WRITE(HSW_PWR_WELL_DRIVER, tmp | req_mask);
}
if (!is_enabled) {
DRM_DEBUG_KMS("Enabling %s\n", power_well->name);
if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
state_mask), 1))
DRM_ERROR("%s enable timeout\n",
power_well->name);
check_fuse_status = true;
}
} else {
if (enable_requested) {
if (IS_SKYLAKE(dev) &&
(power_well->data == SKL_DISP_PW_1) &&
(intel_csr_load_status_get(dev_priv) == FW_LOADED))
DRM_DEBUG_KMS("Not Disabling PW1, dmc will handle\n");
else {
I915_WRITE(HSW_PWR_WELL_DRIVER, tmp & ~req_mask);
POSTING_READ(HSW_PWR_WELL_DRIVER);
DRM_DEBUG_KMS("Disabling %s\n", power_well->name);
}
if ((GEN9_ENABLE_DC5(dev) || SKL_ENABLE_DC6(dev)) &&
power_well->data == SKL_DISP_PW_2) {
enum csr_state state;
/* TODO: wait for a completion event or
* similar here instead of busy
* waiting using wait_for function.
*/
wait_for((state = intel_csr_load_status_get(dev_priv)) !=
FW_UNINITIALIZED, 1000);
if (state != FW_LOADED)
DRM_DEBUG("CSR firmware not ready (%d)\n",
state);
else
if (SKL_ENABLE_DC6(dev))
skl_enable_dc6(dev_priv);
else
gen9_enable_dc5(dev_priv);
}
}
}
if (check_fuse_status) {
if (power_well->data == SKL_DISP_PW_1) {
if (wait_for((I915_READ(SKL_FUSE_STATUS) &
SKL_FUSE_PG1_DIST_STATUS), 1))
DRM_ERROR("PG1 distributing status timeout\n");
} else if (power_well->data == SKL_DISP_PW_2) {
if (wait_for((I915_READ(SKL_FUSE_STATUS) &
SKL_FUSE_PG2_DIST_STATUS), 1))
DRM_ERROR("PG2 distributing status timeout\n");
}
}
if (enable && !is_enabled)
skl_power_well_post_enable(dev_priv, power_well);
}
static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
hsw_set_power_well(dev_priv, power_well, power_well->count > 0);
/*
* We're taking over the BIOS, so clear any requests made by it since
* the driver is in charge now.
*/
if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST)
I915_WRITE(HSW_PWR_WELL_BIOS, 0);
}
static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
hsw_set_power_well(dev_priv, power_well, true);
}
static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
hsw_set_power_well(dev_priv, power_well, false);
}
static bool skl_power_well_enabled(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
uint32_t mask = SKL_POWER_WELL_REQ(power_well->data) |
SKL_POWER_WELL_STATE(power_well->data);
return (I915_READ(HSW_PWR_WELL_DRIVER) & mask) == mask;
}
static void skl_power_well_sync_hw(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
skl_set_power_well(dev_priv, power_well, power_well->count > 0);
/* Clear any request made by BIOS as driver is taking over */
I915_WRITE(HSW_PWR_WELL_BIOS, 0);
}
static void skl_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
skl_set_power_well(dev_priv, power_well, true);
}
static void skl_power_well_disable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
skl_set_power_well(dev_priv, power_well, false);
}
static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
}
static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
return true;
}
static void vlv_set_power_well(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well, bool enable)
{
enum punit_power_well power_well_id = power_well->data;
u32 mask;
u32 state;
u32 ctrl;
mask = PUNIT_PWRGT_MASK(power_well_id);
state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) :
PUNIT_PWRGT_PWR_GATE(power_well_id);
mutex_lock(&dev_priv->rps.hw_lock);
#define COND \
((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state)
if (COND)
goto out;
ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL);
ctrl &= ~mask;
ctrl |= state;
vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl);
if (wait_for(COND, 100))
DRM_ERROR("timeout setting power well state %08x (%08x)\n",
state,
vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL));
#undef COND
out:
mutex_unlock(&dev_priv->rps.hw_lock);
}
static void vlv_power_well_sync_hw(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
vlv_set_power_well(dev_priv, power_well, power_well->count > 0);
}
static void vlv_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
vlv_set_power_well(dev_priv, power_well, true);
}
static void vlv_power_well_disable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
vlv_set_power_well(dev_priv, power_well, false);
}
static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
int power_well_id = power_well->data;
bool enabled = false;
u32 mask;
u32 state;
u32 ctrl;
mask = PUNIT_PWRGT_MASK(power_well_id);
ctrl = PUNIT_PWRGT_PWR_ON(power_well_id);
mutex_lock(&dev_priv->rps.hw_lock);
state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask;
/*
* We only ever set the power-on and power-gate states, anything
* else is unexpected.
*/
WARN_ON(state != PUNIT_PWRGT_PWR_ON(power_well_id) &&
state != PUNIT_PWRGT_PWR_GATE(power_well_id));
if (state == ctrl)
enabled = true;
/*
* A transient state at this point would mean some unexpected party
* is poking at the power controls too.
*/
ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask;
WARN_ON(ctrl != state);
mutex_unlock(&dev_priv->rps.hw_lock);
return enabled;
}
static void vlv_display_power_well_init(struct drm_i915_private *dev_priv)
{
enum pipe pipe;
/*
* Enable the CRI clock source so we can get at the
* display and the reference clock for VGA
* hotplug / manual detection. Supposedly DSI also
* needs the ref clock up and running.
*
* CHV DPLL B/C have some issues if VGA mode is enabled.
*/
for_each_pipe(dev_priv->dev, pipe) {
u32 val = I915_READ(DPLL(pipe));
val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
if (pipe != PIPE_A)
val |= DPLL_INTEGRATED_CRI_CLK_VLV;
I915_WRITE(DPLL(pipe), val);
}
spin_lock_irq(&dev_priv->irq_lock);
valleyview_enable_display_irqs(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
/*
* During driver initialization/resume we can avoid restoring the
* part of the HW/SW state that will be inited anyway explicitly.
*/
if (dev_priv->power_domains.initializing)
return;
intel_hpd_init(dev_priv);
i915_redisable_vga_power_on(dev_priv->dev);
}
static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv)
{
spin_lock_irq(&dev_priv->irq_lock);
valleyview_disable_display_irqs(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
vlv_power_sequencer_reset(dev_priv);
}
static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D);
vlv_set_power_well(dev_priv, power_well, true);
vlv_display_power_well_init(dev_priv);
}
static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D);
vlv_display_power_well_deinit(dev_priv);
vlv_set_power_well(dev_priv, power_well, false);
}
static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC);
/* since ref/cri clock was enabled */
udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
vlv_set_power_well(dev_priv, power_well, true);
/*
* From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
* 6. De-assert cmn_reset/side_reset. Same as VLV X0.
* a. GUnit 0x2110 bit[0] set to 1 (def 0)
* b. The other bits such as sfr settings / modesel may all
* be set to 0.
*
* This should only be done on init and resume from S3 with
* both PLLs disabled, or we risk losing DPIO and PLL
* synchronization.
*/
I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST);
}
static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
enum pipe pipe;
WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC);
for_each_pipe(dev_priv, pipe)
assert_pll_disabled(dev_priv, pipe);
/* Assert common reset */
I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST);
vlv_set_power_well(dev_priv, power_well, false);
}
#define POWER_DOMAIN_MASK (BIT(POWER_DOMAIN_NUM) - 1)
static struct i915_power_well *lookup_power_well(struct drm_i915_private *dev_priv,
int power_well_id)
{
struct i915_power_domains *power_domains = &dev_priv->power_domains;
struct i915_power_well *power_well;
int i;
for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) {
if (power_well->data == power_well_id)
return power_well;
}
return NULL;
}
#define BITS_SET(val, bits) (((val) & (bits)) == (bits))
static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
{
struct i915_power_well *cmn_bc =
lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC);
struct i915_power_well *cmn_d =
lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D);
u32 phy_control = dev_priv->chv_phy_control;
u32 phy_status = 0;
u32 tmp;
if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) {
phy_status |= PHY_POWERGOOD(DPIO_PHY0);
/* this assumes override is only used to enable lanes */
if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0)
phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0);
if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0)
phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1);
/* CL1 is on whenever anything is on in either channel */
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) |
PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)))
phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0);
/*
* The DPLLB check accounts for the pipe B + port A usage
* with CL2 powered up but all the lanes in the second channel
* powered down.
*/
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) &&
(I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0)
phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1);
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0)))
phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0);
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0)))
phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1);
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1)))
phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0);
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1)))
phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1);
}
if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) {
phy_status |= PHY_POWERGOOD(DPIO_PHY1);
/* this assumes override is only used to enable lanes */
if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0)
phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0);
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0)))
phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0);
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0)))
phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0);
if (BITS_SET(phy_control,
PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0)))
phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1);
}
/*
* The PHY may be busy with some initial calibration and whatnot,
* so the power state can take a while to actually change.
*/
if (wait_for((tmp = I915_READ(DISPLAY_PHY_STATUS)) == phy_status, 10))
WARN(phy_status != tmp,
"Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n",
tmp, phy_status, dev_priv->chv_phy_control);
}
#undef BITS_SET
static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
enum dpio_phy phy;
enum pipe pipe;
uint32_t tmp;
WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC &&
power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D);
if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) {
pipe = PIPE_A;
phy = DPIO_PHY0;
} else {
pipe = PIPE_C;
phy = DPIO_PHY1;
}
/* since ref/cri clock was enabled */
udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
vlv_set_power_well(dev_priv, power_well, true);
/* Poll for phypwrgood signal */
if (wait_for(I915_READ(DISPLAY_PHY_STATUS) & PHY_POWERGOOD(phy), 1))
DRM_ERROR("Display PHY %d is not power up\n", phy);
mutex_lock(&dev_priv->sb_lock);
/* Enable dynamic power down */
tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28);
tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN |
DPIO_SUS_CLK_CONFIG_GATE_CLKREQ;
vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp);
if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) {
tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1);
tmp |= DPIO_DYNPWRDOWNEN_CH1;
vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp);
} else {
/*
* Force the non-existing CL2 off. BXT does this
* too, so maybe it saves some power even though
* CL2 doesn't exist?
*/
tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30);
tmp |= DPIO_CL2_LDOFUSE_PWRENB;
vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp);
}
mutex_unlock(&dev_priv->sb_lock);
dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy);
I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
phy, dev_priv->chv_phy_control);
assert_chv_phy_status(dev_priv);
}
static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
enum dpio_phy phy;
WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC &&
power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D);
if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) {
phy = DPIO_PHY0;
assert_pll_disabled(dev_priv, PIPE_A);
assert_pll_disabled(dev_priv, PIPE_B);
} else {
phy = DPIO_PHY1;
assert_pll_disabled(dev_priv, PIPE_C);
}
dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy);
I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
vlv_set_power_well(dev_priv, power_well, false);
DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
phy, dev_priv->chv_phy_control);
assert_chv_phy_status(dev_priv);
}
static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy,
enum dpio_channel ch, bool override, unsigned int mask)
{
enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C;
u32 reg, val, expected, actual;
if (ch == DPIO_CH0)
reg = _CHV_CMN_DW0_CH0;
else
reg = _CHV_CMN_DW6_CH1;
mutex_lock(&dev_priv->sb_lock);
val = vlv_dpio_read(dev_priv, pipe, reg);
mutex_unlock(&dev_priv->sb_lock);
/*
* This assumes !override is only used when the port is disabled.
* All lanes should power down even without the override when
* the port is disabled.
*/
if (!override || mask == 0xf) {
expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
/*
* If CH1 common lane is not active anymore
* (eg. for pipe B DPLL) the entire channel will
* shut down, which causes the common lane registers
* to read as 0. That means we can't actually check
* the lane power down status bits, but as the entire
* register reads as 0 it's a good indication that the
* channel is indeed entirely powered down.
*/
if (ch == DPIO_CH1 && val == 0)
expected = 0;
} else if (mask != 0x0) {
expected = DPIO_ANYDL_POWERDOWN;
} else {
expected = 0;
}
if (ch == DPIO_CH0)
actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0;
else
actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1;
actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
WARN(actual != expected,
"Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n",
!!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN),
!!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN),
reg, val);
}
bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy,
enum dpio_channel ch, bool override)
{
struct i915_power_domains *power_domains = &dev_priv->power_domains;
bool was_override;
mutex_lock(&power_domains->lock);
was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
if (override == was_override)
goto out;
if (override)
dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
else
dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n",
phy, ch, dev_priv->chv_phy_control);
assert_chv_phy_status(dev_priv);
out:
mutex_unlock(&power_domains->lock);
return was_override;
}
void chv_phy_powergate_lanes(struct intel_encoder *encoder,
bool override, unsigned int mask)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct i915_power_domains *power_domains = &dev_priv->power_domains;
enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base));
enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
mutex_lock(&power_domains->lock);
dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch);
dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch);
if (override)
dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
else
dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n",
phy, ch, mask, dev_priv->chv_phy_control);
assert_chv_phy_status(dev_priv);
assert_chv_phy_powergate(dev_priv, phy, ch, override, mask);
mutex_unlock(&power_domains->lock);
}
static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
enum pipe pipe = power_well->data;
bool enabled;
u32 state, ctrl;
mutex_lock(&dev_priv->rps.hw_lock);
state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe);
/*
* We only ever set the power-on and power-gate states, anything
* else is unexpected.
*/
WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe));
enabled = state == DP_SSS_PWR_ON(pipe);
/*
* A transient state at this point would mean some unexpected party
* is poking at the power controls too.
*/
ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe);
WARN_ON(ctrl << 16 != state);
mutex_unlock(&dev_priv->rps.hw_lock);
return enabled;
}
static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well,
bool enable)
{
enum pipe pipe = power_well->data;
u32 state;
u32 ctrl;
state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe);
mutex_lock(&dev_priv->rps.hw_lock);
#define COND \
((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state)
if (COND)
goto out;
ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
ctrl &= ~DP_SSC_MASK(pipe);
ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe);
vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl);
if (wait_for(COND, 100))
DRM_ERROR("timeout setting power well state %08x (%08x)\n",
state,
vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ));
#undef COND
out:
mutex_unlock(&dev_priv->rps.hw_lock);
}
static void chv_pipe_power_well_sync_hw(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
WARN_ON_ONCE(power_well->data != PIPE_A);
chv_set_pipe_power_well(dev_priv, power_well, power_well->count > 0);
}
static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
WARN_ON_ONCE(power_well->data != PIPE_A);
chv_set_pipe_power_well(dev_priv, power_well, true);
vlv_display_power_well_init(dev_priv);
}
static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
WARN_ON_ONCE(power_well->data != PIPE_A);
vlv_display_power_well_deinit(dev_priv);
chv_set_pipe_power_well(dev_priv, power_well, false);
}
/**
* intel_display_power_get - grab a power domain reference
* @dev_priv: i915 device instance
* @domain: power domain to reference
*
* This function grabs a power domain reference for @domain and ensures that the
* power domain and all its parents are powered up. Therefore users should only
* grab a reference to the innermost power domain they need.
*
* Any power domain reference obtained by this function must have a symmetric
* call to intel_display_power_put() to release the reference again.
*/
void intel_display_power_get(struct drm_i915_private *dev_priv,
enum intel_display_power_domain domain)
{
struct i915_power_domains *power_domains;
struct i915_power_well *power_well;
int i;
intel_runtime_pm_get(dev_priv);
power_domains = &dev_priv->power_domains;
mutex_lock(&power_domains->lock);
for_each_power_well(i, power_well, BIT(domain), power_domains) {
if (!power_well->count++)
intel_power_well_enable(dev_priv, power_well);
}
power_domains->domain_use_count[domain]++;
mutex_unlock(&power_domains->lock);
}
/**
* intel_display_power_put - release a power domain reference
* @dev_priv: i915 device instance
* @domain: power domain to reference
*
* This function drops the power domain reference obtained by
* intel_display_power_get() and might power down the corresponding hardware
* block right away if this is the last reference.
*/
void intel_display_power_put(struct drm_i915_private *dev_priv,
enum intel_display_power_domain domain)
{
struct i915_power_domains *power_domains;
struct i915_power_well *power_well;
int i;
power_domains = &dev_priv->power_domains;
mutex_lock(&power_domains->lock);
WARN_ON(!power_domains->domain_use_count[domain]);
power_domains->domain_use_count[domain]--;
for_each_power_well_rev(i, power_well, BIT(domain), power_domains) {
WARN_ON(!power_well->count);
if (!--power_well->count && i915.disable_power_well)
intel_power_well_disable(dev_priv, power_well);
}
mutex_unlock(&power_domains->lock);
intel_runtime_pm_put(dev_priv);
}
#define HSW_ALWAYS_ON_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PIPE_A) | \
BIT(POWER_DOMAIN_TRANSCODER_EDP) | \
BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \
BIT(POWER_DOMAIN_PORT_CRT) | \
BIT(POWER_DOMAIN_PLLS) | \
BIT(POWER_DOMAIN_AUX_A) | \
BIT(POWER_DOMAIN_AUX_B) | \
BIT(POWER_DOMAIN_AUX_C) | \
BIT(POWER_DOMAIN_AUX_D) | \
BIT(POWER_DOMAIN_INIT))
#define HSW_DISPLAY_POWER_DOMAINS ( \
(POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS) | \
BIT(POWER_DOMAIN_INIT))
#define BDW_ALWAYS_ON_POWER_DOMAINS ( \
HSW_ALWAYS_ON_POWER_DOMAINS | \
BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER))
#define BDW_DISPLAY_POWER_DOMAINS ( \
(POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS) | \
BIT(POWER_DOMAIN_INIT))
#define VLV_ALWAYS_ON_POWER_DOMAINS BIT(POWER_DOMAIN_INIT)
#define VLV_DISPLAY_POWER_DOMAINS POWER_DOMAIN_MASK
#define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
BIT(POWER_DOMAIN_PORT_CRT) | \
BIT(POWER_DOMAIN_AUX_B) | \
BIT(POWER_DOMAIN_AUX_C) | \
BIT(POWER_DOMAIN_INIT))
#define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
BIT(POWER_DOMAIN_AUX_B) | \
BIT(POWER_DOMAIN_INIT))
#define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
BIT(POWER_DOMAIN_AUX_B) | \
BIT(POWER_DOMAIN_INIT))
#define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
BIT(POWER_DOMAIN_AUX_C) | \
BIT(POWER_DOMAIN_INIT))
#define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
BIT(POWER_DOMAIN_AUX_C) | \
BIT(POWER_DOMAIN_INIT))
#define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \
BIT(POWER_DOMAIN_AUX_B) | \
BIT(POWER_DOMAIN_AUX_C) | \
BIT(POWER_DOMAIN_INIT))
#define CHV_DPIO_CMN_D_POWER_DOMAINS ( \
BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \
BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \
BIT(POWER_DOMAIN_AUX_D) | \
BIT(POWER_DOMAIN_INIT))
static const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
.sync_hw = i9xx_always_on_power_well_noop,
.enable = i9xx_always_on_power_well_noop,
.disable = i9xx_always_on_power_well_noop,
.is_enabled = i9xx_always_on_power_well_enabled,
};
static const struct i915_power_well_ops chv_pipe_power_well_ops = {
.sync_hw = chv_pipe_power_well_sync_hw,
.enable = chv_pipe_power_well_enable,
.disable = chv_pipe_power_well_disable,
.is_enabled = chv_pipe_power_well_enabled,
};
static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = {
.sync_hw = vlv_power_well_sync_hw,
.enable = chv_dpio_cmn_power_well_enable,
.disable = chv_dpio_cmn_power_well_disable,
.is_enabled = vlv_power_well_enabled,
};
static struct i915_power_well i9xx_always_on_power_well[] = {
{
.name = "always-on",
.always_on = 1,
.domains = POWER_DOMAIN_MASK,
.ops = &i9xx_always_on_power_well_ops,
},
};
static const struct i915_power_well_ops hsw_power_well_ops = {
.sync_hw = hsw_power_well_sync_hw,
.enable = hsw_power_well_enable,
.disable = hsw_power_well_disable,
.is_enabled = hsw_power_well_enabled,
};
static const struct i915_power_well_ops skl_power_well_ops = {
.sync_hw = skl_power_well_sync_hw,
.enable = skl_power_well_enable,
.disable = skl_power_well_disable,
.is_enabled = skl_power_well_enabled,
};
static struct i915_power_well hsw_power_wells[] = {
{
.name = "always-on",
.always_on = 1,
.domains = HSW_ALWAYS_ON_POWER_DOMAINS,
.ops = &i9xx_always_on_power_well_ops,
},
{
.name = "display",
.domains = HSW_DISPLAY_POWER_DOMAINS,
.ops = &hsw_power_well_ops,
},
};
static struct i915_power_well bdw_power_wells[] = {
{
.name = "always-on",
.always_on = 1,
.domains = BDW_ALWAYS_ON_POWER_DOMAINS,
.ops = &i9xx_always_on_power_well_ops,
},
{
.name = "display",
.domains = BDW_DISPLAY_POWER_DOMAINS,
.ops = &hsw_power_well_ops,
},
};
static const struct i915_power_well_ops vlv_display_power_well_ops = {
.sync_hw = vlv_power_well_sync_hw,
.enable = vlv_display_power_well_enable,
.disable = vlv_display_power_well_disable,
.is_enabled = vlv_power_well_enabled,
};
static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = {
.sync_hw = vlv_power_well_sync_hw,
.enable = vlv_dpio_cmn_power_well_enable,
.disable = vlv_dpio_cmn_power_well_disable,
.is_enabled = vlv_power_well_enabled,
};
static const struct i915_power_well_ops vlv_dpio_power_well_ops = {
.sync_hw = vlv_power_well_sync_hw,
.enable = vlv_power_well_enable,
.disable = vlv_power_well_disable,
.is_enabled = vlv_power_well_enabled,
};
static struct i915_power_well vlv_power_wells[] = {
{
.name = "always-on",
.always_on = 1,
.domains = VLV_ALWAYS_ON_POWER_DOMAINS,
.ops = &i9xx_always_on_power_well_ops,
},
{
.name = "display",
.domains = VLV_DISPLAY_POWER_DOMAINS,
.data = PUNIT_POWER_WELL_DISP2D,
.ops = &vlv_display_power_well_ops,
},
{
.name = "dpio-tx-b-01",
.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
.ops = &vlv_dpio_power_well_ops,
.data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01,
},
{
.name = "dpio-tx-b-23",
.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
.ops = &vlv_dpio_power_well_ops,
.data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23,
},
{
.name = "dpio-tx-c-01",
.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
.ops = &vlv_dpio_power_well_ops,
.data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01,
},
{
.name = "dpio-tx-c-23",
.domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
.ops = &vlv_dpio_power_well_ops,
.data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23,
},
{
.name = "dpio-common",
.domains = VLV_DPIO_CMN_BC_POWER_DOMAINS,
.data = PUNIT_POWER_WELL_DPIO_CMN_BC,
.ops = &vlv_dpio_cmn_power_well_ops,
},
};
static struct i915_power_well chv_power_wells[] = {
{
.name = "always-on",
.always_on = 1,
.domains = VLV_ALWAYS_ON_POWER_DOMAINS,
.ops = &i9xx_always_on_power_well_ops,
},
{
.name = "display",
/*
* Pipe A power well is the new disp2d well. Pipe B and C
* power wells don't actually exist. Pipe A power well is
* required for any pipe to work.
*/
.domains = VLV_DISPLAY_POWER_DOMAINS,
.data = PIPE_A,
.ops = &chv_pipe_power_well_ops,
},
{
.name = "dpio-common-bc",
.domains = CHV_DPIO_CMN_BC_POWER_DOMAINS,
.data = PUNIT_POWER_WELL_DPIO_CMN_BC,
.ops = &chv_dpio_cmn_power_well_ops,
},
{
.name = "dpio-common-d",
.domains = CHV_DPIO_CMN_D_POWER_DOMAINS,
.data = PUNIT_POWER_WELL_DPIO_CMN_D,
.ops = &chv_dpio_cmn_power_well_ops,
},
};
bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
int power_well_id)
{
struct i915_power_well *power_well;
bool ret;
power_well = lookup_power_well(dev_priv, power_well_id);
ret = power_well->ops->is_enabled(dev_priv, power_well);
return ret;
}
static struct i915_power_well skl_power_wells[] = {
{
.name = "always-on",
.always_on = 1,
.domains = SKL_DISPLAY_ALWAYS_ON_POWER_DOMAINS,
.ops = &i9xx_always_on_power_well_ops,
},
{
.name = "power well 1",
.domains = SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_1,
},
{
.name = "MISC IO power well",
.domains = SKL_DISPLAY_MISC_IO_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_MISC_IO,
},
{
.name = "power well 2",
.domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_2,
},
{
.name = "DDI A/E power well",
.domains = SKL_DISPLAY_DDI_A_E_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_DDI_A_E,
},
{
.name = "DDI B power well",
.domains = SKL_DISPLAY_DDI_B_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_DDI_B,
},
{
.name = "DDI C power well",
.domains = SKL_DISPLAY_DDI_C_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_DDI_C,
},
{
.name = "DDI D power well",
.domains = SKL_DISPLAY_DDI_D_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_DDI_D,
},
};
static struct i915_power_well bxt_power_wells[] = {
{
.name = "always-on",
.always_on = 1,
.domains = BXT_DISPLAY_ALWAYS_ON_POWER_DOMAINS,
.ops = &i9xx_always_on_power_well_ops,
},
{
.name = "power well 1",
.domains = BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_1,
},
{
.name = "power well 2",
.domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS,
.ops = &skl_power_well_ops,
.data = SKL_DISP_PW_2,
}
};
#define set_power_wells(power_domains, __power_wells) ({ \
(power_domains)->power_wells = (__power_wells); \
(power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \
})
/**
* intel_power_domains_init - initializes the power domain structures
* @dev_priv: i915 device instance
*
* Initializes the power domain structures for @dev_priv depending upon the
* supported platform.
*/
int intel_power_domains_init(struct drm_i915_private *dev_priv)
{
struct i915_power_domains *power_domains = &dev_priv->power_domains;
mutex_init(&power_domains->lock);
/*
* The enabling order will be from lower to higher indexed wells,
* the disabling order is reversed.
*/
if (IS_HASWELL(dev_priv->dev)) {
set_power_wells(power_domains, hsw_power_wells);
} else if (IS_BROADWELL(dev_priv->dev)) {
set_power_wells(power_domains, bdw_power_wells);
} else if (IS_SKYLAKE(dev_priv->dev)) {
set_power_wells(power_domains, skl_power_wells);
} else if (IS_BROXTON(dev_priv->dev)) {
set_power_wells(power_domains, bxt_power_wells);
} else if (IS_CHERRYVIEW(dev_priv->dev)) {
set_power_wells(power_domains, chv_power_wells);
} else if (IS_VALLEYVIEW(dev_priv->dev)) {
set_power_wells(power_domains, vlv_power_wells);
} else {
set_power_wells(power_domains, i9xx_always_on_power_well);
}
return 0;
}
static void intel_runtime_pm_disable(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
struct device *device = &dev->pdev->dev;
if (!HAS_RUNTIME_PM(dev))
return;
if (!intel_enable_rc6(dev))
return;
/* Make sure we're not suspended first. */
pm_runtime_get_sync(device);
}
/**
* intel_power_domains_fini - finalizes the power domain structures
* @dev_priv: i915 device instance
*
* Finalizes the power domain structures for @dev_priv depending upon the
* supported platform. This function also disables runtime pm and ensures that
* the device stays powered up so that the driver can be reloaded.
*/
void intel_power_domains_fini(struct drm_i915_private *dev_priv)
{
intel_runtime_pm_disable(dev_priv);
/* The i915.ko module is still not prepared to be loaded when
* the power well is not enabled, so just enable it in case
* we're going to unload/reload. */
intel_display_set_init_power(dev_priv, true);
}
static void intel_power_domains_resume(struct drm_i915_private *dev_priv)
{
struct i915_power_domains *power_domains = &dev_priv->power_domains;
struct i915_power_well *power_well;
int i;
mutex_lock(&power_domains->lock);
for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) {
power_well->ops->sync_hw(dev_priv, power_well);
power_well->hw_enabled = power_well->ops->is_enabled(dev_priv,
power_well);
}
mutex_unlock(&power_domains->lock);
}
static void chv_phy_control_init(struct drm_i915_private *dev_priv)
{
struct i915_power_well *cmn_bc =
lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC);
struct i915_power_well *cmn_d =
lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D);
/*
* DISPLAY_PHY_CONTROL can get corrupted if read. As a
* workaround never ever read DISPLAY_PHY_CONTROL, and
* instead maintain a shadow copy ourselves. Use the actual
* power well state and lane status to reconstruct the
* expected initial value.
*/
dev_priv->chv_phy_control =
PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) |
PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) |
PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) |
PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) |
PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0);
/*
* If all lanes are disabled we leave the override disabled
* with all power down bits cleared to match the state we
* would use after disabling the port. Otherwise enable the
* override and set the lane powerdown bits accding to the
* current lane status.
*/
if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) {
uint32_t status = I915_READ(DPLL(PIPE_A));
unsigned int mask;
mask = status & DPLL_PORTB_READY_MASK;
if (mask == 0xf)
mask = 0x0;
else
dev_priv->chv_phy_control |=
PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0);
dev_priv->chv_phy_control |=
PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0);
mask = (status & DPLL_PORTC_READY_MASK) >> 4;
if (mask == 0xf)
mask = 0x0;
else
dev_priv->chv_phy_control |=
PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1);
dev_priv->chv_phy_control |=
PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1);
dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0);
}
if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) {
uint32_t status = I915_READ(DPIO_PHY_STATUS);
unsigned int mask;
mask = status & DPLL_PORTD_READY_MASK;
if (mask == 0xf)
mask = 0x0;
else
dev_priv->chv_phy_control |=
PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0);
dev_priv->chv_phy_control |=
PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0);
dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1);
}
I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n",
dev_priv->chv_phy_control);
}
static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
{
struct i915_power_well *cmn =
lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC);
struct i915_power_well *disp2d =
lookup_power_well(dev_priv, PUNIT_POWER_WELL_DISP2D);
/* If the display might be already active skip this */
if (cmn->ops->is_enabled(dev_priv, cmn) &&
disp2d->ops->is_enabled(dev_priv, disp2d) &&
I915_READ(DPIO_CTL) & DPIO_CMNRST)
return;
DRM_DEBUG_KMS("toggling display PHY side reset\n");
/* cmnlane needs DPLL registers */
disp2d->ops->enable(dev_priv, disp2d);
/*
* From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx:
* Need to assert and de-assert PHY SB reset by gating the
* common lane power, then un-gating it.
* Simply ungating isn't enough to reset the PHY enough to get
* ports and lanes running.
*/
cmn->ops->disable(dev_priv, cmn);
}
/**
* intel_power_domains_init_hw - initialize hardware power domain state
* @dev_priv: i915 device instance
*
* This function initializes the hardware power domain state and enables all
* power domains using intel_display_set_init_power().
*/
void intel_power_domains_init_hw(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
struct i915_power_domains *power_domains = &dev_priv->power_domains;
power_domains->initializing = true;
if (IS_CHERRYVIEW(dev)) {
mutex_lock(&power_domains->lock);
chv_phy_control_init(dev_priv);
mutex_unlock(&power_domains->lock);
} else if (IS_VALLEYVIEW(dev)) {
mutex_lock(&power_domains->lock);
vlv_cmnlane_wa(dev_priv);
mutex_unlock(&power_domains->lock);
}
/* For now, we need the power well to be always enabled. */
intel_display_set_init_power(dev_priv, true);
intel_power_domains_resume(dev_priv);
power_domains->initializing = false;
}
/**
* intel_aux_display_runtime_get - grab an auxiliary power domain reference
* @dev_priv: i915 device instance
*
* This function grabs a power domain reference for the auxiliary power domain
* (for access to the GMBUS and DP AUX blocks) and ensures that it and all its
* parents are powered up. Therefore users should only grab a reference to the
* innermost power domain they need.
*
* Any power domain reference obtained by this function must have a symmetric
* call to intel_aux_display_runtime_put() to release the reference again.
*/
void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv)
{
intel_runtime_pm_get(dev_priv);
}
/**
* intel_aux_display_runtime_put - release an auxiliary power domain reference
* @dev_priv: i915 device instance
*
* This function drops the auxiliary power domain reference obtained by
* intel_aux_display_runtime_get() and might power down the corresponding
* hardware block right away if this is the last reference.
*/
void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv)
{
intel_runtime_pm_put(dev_priv);
}
/**
* intel_runtime_pm_get - grab a runtime pm reference
* @dev_priv: i915 device instance
*
* This function grabs a device-level runtime pm reference (mostly used for GEM
* code to ensure the GTT or GT is on) and ensures that it is powered up.
*
* Any runtime pm reference obtained by this function must have a symmetric
* call to intel_runtime_pm_put() to release the reference again.
*/
void intel_runtime_pm_get(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
struct device *device = &dev->pdev->dev;
if (!HAS_RUNTIME_PM(dev))
return;
pm_runtime_get_sync(device);
WARN(dev_priv->pm.suspended, "Device still suspended.\n");
}
/**
* intel_runtime_pm_get_noresume - grab a runtime pm reference
* @dev_priv: i915 device instance
*
* This function grabs a device-level runtime pm reference (mostly used for GEM
* code to ensure the GTT or GT is on).
*
* It will _not_ power up the device but instead only check that it's powered
* on. Therefore it is only valid to call this functions from contexts where
* the device is known to be powered up and where trying to power it up would
* result in hilarity and deadlocks. That pretty much means only the system
* suspend/resume code where this is used to grab runtime pm references for
* delayed setup down in work items.
*
* Any runtime pm reference obtained by this function must have a symmetric
* call to intel_runtime_pm_put() to release the reference again.
*/
void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
struct device *device = &dev->pdev->dev;
if (!HAS_RUNTIME_PM(dev))
return;
WARN(dev_priv->pm.suspended, "Getting nosync-ref while suspended.\n");
pm_runtime_get_noresume(device);
}
/**
* intel_runtime_pm_put - release a runtime pm reference
* @dev_priv: i915 device instance
*
* This function drops the device-level runtime pm reference obtained by
* intel_runtime_pm_get() and might power down the corresponding
* hardware block right away if this is the last reference.
*/
void intel_runtime_pm_put(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
struct device *device = &dev->pdev->dev;
if (!HAS_RUNTIME_PM(dev))
return;
pm_runtime_mark_last_busy(device);
pm_runtime_put_autosuspend(device);
}
/**
* intel_runtime_pm_enable - enable runtime pm
* @dev_priv: i915 device instance
*
* This function enables runtime pm at the end of the driver load sequence.
*
* Note that this function does currently not enable runtime pm for the
* subordinate display power domains. That is only done on the first modeset
* using intel_display_set_init_power().
*/
void intel_runtime_pm_enable(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
struct device *device = &dev->pdev->dev;
if (!HAS_RUNTIME_PM(dev))
return;
/*
* RPM depends on RC6 to save restore the GT HW context, so make RC6 a
* requirement.
*/
if (!intel_enable_rc6(dev)) {
DRM_INFO("RC6 disabled, disabling runtime PM support\n");
return;
}
pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */
pm_runtime_mark_last_busy(device);
pm_runtime_use_autosuspend(device);
pm_runtime_put_autosuspend(device);
}
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