// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include "g4x_dp.h"
#include "i915_drv.h"
#include "i915_reg.h"
#include "intel_de.h"
#include "intel_display_power_well.h"
#include "intel_display_types.h"
#include "intel_dp.h"
#include "intel_dpio_phy.h"
#include "intel_dpll.h"
#include "intel_lvds.h"
#include "intel_lvds_regs.h"
#include "intel_pps.h"
#include "intel_pps_regs.h"
#include "intel_quirks.h"
static void vlv_steal_power_sequencer(struct intel_display *display,
enum pipe pipe);
static void pps_init_delays(struct intel_dp *intel_dp);
static void pps_init_registers(struct intel_dp *intel_dp, bool force_disable_vdd);
static const char *pps_name(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *i915 = to_i915(display->drm);
struct intel_pps *pps = &intel_dp->pps;
if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
switch (pps->pps_pipe) {
case INVALID_PIPE:
/*
* FIXME would be nice if we can guarantee
* to always have a valid PPS when calling this.
*/
return "PPS <none>";
case PIPE_A:
return "PPS A";
case PIPE_B:
return "PPS B";
default:
MISSING_CASE(pps->pps_pipe);
break;
}
} else {
switch (pps->pps_idx) {
case 0:
return "PPS 0";
case 1:
return "PPS 1";
default:
MISSING_CASE(pps->pps_idx);
break;
}
}
return "PPS <invalid>";
}
intel_wakeref_t intel_pps_lock(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
intel_wakeref_t wakeref;
/*
* See intel_pps_reset_all() why we need a power domain reference here.
*/
wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE);
mutex_lock(&display->pps.mutex);
return wakeref;
}
intel_wakeref_t intel_pps_unlock(struct intel_dp *intel_dp,
intel_wakeref_t wakeref)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
mutex_unlock(&display->pps.mutex);
intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
return 0;
}
static void
vlv_power_sequencer_kick(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
enum pipe pipe = intel_dp->pps.pps_pipe;
bool pll_enabled, release_cl_override = false;
enum dpio_phy phy = vlv_pipe_to_phy(pipe);
enum dpio_channel ch = vlv_pipe_to_channel(pipe);
u32 DP;
if (drm_WARN(display->drm,
intel_de_read(display, intel_dp->output_reg) & DP_PORT_EN,
"skipping %s kick due to [ENCODER:%d:%s] being active\n",
pps_name(intel_dp),
dig_port->base.base.base.id, dig_port->base.base.name))
return;
drm_dbg_kms(display->drm,
"kicking %s for [ENCODER:%d:%s]\n",
pps_name(intel_dp),
dig_port->base.base.base.id, dig_port->base.base.name);
/* Preserve the BIOS-computed detected bit. This is
* supposed to be read-only.
*/
DP = intel_de_read(display, intel_dp->output_reg) & DP_DETECTED;
DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
DP |= DP_PORT_WIDTH(1);
DP |= DP_LINK_TRAIN_PAT_1;
if (IS_CHERRYVIEW(dev_priv))
DP |= DP_PIPE_SEL_CHV(pipe);
else
DP |= DP_PIPE_SEL(pipe);
pll_enabled = intel_de_read(display, DPLL(display, pipe)) & DPLL_VCO_ENABLE;
/*
* The DPLL for the pipe must be enabled for this to work.
* So enable temporarily it if it's not already enabled.
*/
if (!pll_enabled) {
release_cl_override = IS_CHERRYVIEW(dev_priv) &&
!chv_phy_powergate_ch(dev_priv, phy, ch, true);
if (vlv_force_pll_on(dev_priv, pipe, vlv_get_dpll(dev_priv))) {
drm_err(display->drm,
"Failed to force on PLL for pipe %c!\n",
pipe_name(pipe));
return;
}
}
/*
* Similar magic as in intel_dp_enable_port().
* We _must_ do this port enable + disable trick
* to make this power sequencer lock onto the port.
* Otherwise even VDD force bit won't work.
*/
intel_de_write(display, intel_dp->output_reg, DP);
intel_de_posting_read(display, intel_dp->output_reg);
intel_de_write(display, intel_dp->output_reg, DP | DP_PORT_EN);
intel_de_posting_read(display, intel_dp->output_reg);
intel_de_write(display, intel_dp->output_reg, DP & ~DP_PORT_EN);
intel_de_posting_read(display, intel_dp->output_reg);
if (!pll_enabled) {
vlv_force_pll_off(dev_priv, pipe);
if (release_cl_override)
chv_phy_powergate_ch(dev_priv, phy, ch, false);
}
}
static enum pipe vlv_find_free_pps(struct intel_display *display)
{
struct intel_encoder *encoder;
unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
/*
* We don't have power sequencer currently.
* Pick one that's not used by other ports.
*/
for_each_intel_dp(display->drm, encoder) {
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
if (encoder->type == INTEL_OUTPUT_EDP) {
drm_WARN_ON(display->drm,
intel_dp->pps.active_pipe != INVALID_PIPE &&
intel_dp->pps.active_pipe !=
intel_dp->pps.pps_pipe);
if (intel_dp->pps.pps_pipe != INVALID_PIPE)
pipes &= ~(1 << intel_dp->pps.pps_pipe);
} else {
drm_WARN_ON(display->drm,
intel_dp->pps.pps_pipe != INVALID_PIPE);
if (intel_dp->pps.active_pipe != INVALID_PIPE)
pipes &= ~(1 << intel_dp->pps.active_pipe);
}
}
if (pipes == 0)
return INVALID_PIPE;
return ffs(pipes) - 1;
}
static enum pipe
vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
enum pipe pipe;
lockdep_assert_held(&display->pps.mutex);
/* We should never land here with regular DP ports */
drm_WARN_ON(display->drm, !intel_dp_is_edp(intel_dp));
drm_WARN_ON(display->drm, intel_dp->pps.active_pipe != INVALID_PIPE &&
intel_dp->pps.active_pipe != intel_dp->pps.pps_pipe);
if (intel_dp->pps.pps_pipe != INVALID_PIPE)
return intel_dp->pps.pps_pipe;
pipe = vlv_find_free_pps(display);
/*
* Didn't find one. This should not happen since there
* are two power sequencers and up to two eDP ports.
*/
if (drm_WARN_ON(display->drm, pipe == INVALID_PIPE))
pipe = PIPE_A;
vlv_steal_power_sequencer(display, pipe);
intel_dp->pps.pps_pipe = pipe;
drm_dbg_kms(display->drm,
"picked %s for [ENCODER:%d:%s]\n",
pps_name(intel_dp),
dig_port->base.base.base.id, dig_port->base.base.name);
/* init power sequencer on this pipe and port */
pps_init_delays(intel_dp);
pps_init_registers(intel_dp, true);
/*
* Even vdd force doesn't work until we've made
* the power sequencer lock in on the port.
*/
vlv_power_sequencer_kick(intel_dp);
return intel_dp->pps.pps_pipe;
}
static int
bxt_power_sequencer_idx(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
int pps_idx = intel_dp->pps.pps_idx;
lockdep_assert_held(&display->pps.mutex);
/* We should never land here with regular DP ports */
drm_WARN_ON(display->drm, !intel_dp_is_edp(intel_dp));
if (!intel_dp->pps.pps_reset)
return pps_idx;
intel_dp->pps.pps_reset = false;
/*
* Only the HW needs to be reprogrammed, the SW state is fixed and
* has been setup during connector init.
*/
pps_init_registers(intel_dp, false);
return pps_idx;
}
typedef bool (*pps_check)(struct intel_display *display, int pps_idx);
static bool pps_has_pp_on(struct intel_display *display, int pps_idx)
{
return intel_de_read(display, PP_STATUS(display, pps_idx)) & PP_ON;
}
static bool pps_has_vdd_on(struct intel_display *display, int pps_idx)
{
return intel_de_read(display, PP_CONTROL(display, pps_idx)) & EDP_FORCE_VDD;
}
static bool pps_any(struct intel_display *display, int pps_idx)
{
return true;
}
static enum pipe
vlv_initial_pps_pipe(struct intel_display *display,
enum port port, pps_check check)
{
enum pipe pipe;
for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
u32 port_sel = intel_de_read(display,
PP_ON_DELAYS(display, pipe)) &
PANEL_PORT_SELECT_MASK;
if (port_sel != PANEL_PORT_SELECT_VLV(port))
continue;
if (!check(display, pipe))
continue;
return pipe;
}
return INVALID_PIPE;
}
static void
vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
enum port port = dig_port->base.port;
lockdep_assert_held(&display->pps.mutex);
/* try to find a pipe with this port selected */
/* first pick one where the panel is on */
intel_dp->pps.pps_pipe = vlv_initial_pps_pipe(display, port,
pps_has_pp_on);
/* didn't find one? pick one where vdd is on */
if (intel_dp->pps.pps_pipe == INVALID_PIPE)
intel_dp->pps.pps_pipe = vlv_initial_pps_pipe(display, port,
pps_has_vdd_on);
/* didn't find one? pick one with just the correct port */
if (intel_dp->pps.pps_pipe == INVALID_PIPE)
intel_dp->pps.pps_pipe = vlv_initial_pps_pipe(display, port,
pps_any);
/* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
if (intel_dp->pps.pps_pipe == INVALID_PIPE) {
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] no initial power sequencer\n",
dig_port->base.base.base.id, dig_port->base.base.name);
return;
}
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] initial power sequencer: %s\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
}
static int intel_num_pps(struct intel_display *display)
{
struct drm_i915_private *i915 = to_i915(display->drm);
if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
return 2;
if (IS_GEMINILAKE(i915) || IS_BROXTON(i915))
return 2;
if (INTEL_PCH_TYPE(i915) >= PCH_MTL)
return 2;
if (INTEL_PCH_TYPE(i915) >= PCH_DG1)
return 1;
if (INTEL_PCH_TYPE(i915) >= PCH_ICP)
return 2;
return 1;
}
static bool intel_pps_is_valid(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *i915 = to_i915(display->drm);
if (intel_dp->pps.pps_idx == 1 &&
INTEL_PCH_TYPE(i915) >= PCH_ICP &&
INTEL_PCH_TYPE(i915) <= PCH_ADP)
return intel_de_read(display, SOUTH_CHICKEN1) & ICP_SECOND_PPS_IO_SELECT;
return true;
}
static int
bxt_initial_pps_idx(struct intel_display *display, pps_check check)
{
int pps_idx, pps_num = intel_num_pps(display);
for (pps_idx = 0; pps_idx < pps_num; pps_idx++) {
if (check(display, pps_idx))
return pps_idx;
}
return -1;
}
static bool
pps_initial_setup(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
struct intel_connector *connector = intel_dp->attached_connector;
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
lockdep_assert_held(&display->pps.mutex);
if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
vlv_initial_power_sequencer_setup(intel_dp);
return true;
}
/* first ask the VBT */
if (intel_num_pps(display) > 1)
intel_dp->pps.pps_idx = connector->panel.vbt.backlight.controller;
else
intel_dp->pps.pps_idx = 0;
if (drm_WARN_ON(display->drm, intel_dp->pps.pps_idx >= intel_num_pps(display)))
intel_dp->pps.pps_idx = -1;
/* VBT wasn't parsed yet? pick one where the panel is on */
if (intel_dp->pps.pps_idx < 0)
intel_dp->pps.pps_idx = bxt_initial_pps_idx(display, pps_has_pp_on);
/* didn't find one? pick one where vdd is on */
if (intel_dp->pps.pps_idx < 0)
intel_dp->pps.pps_idx = bxt_initial_pps_idx(display, pps_has_vdd_on);
/* didn't find one? pick any */
if (intel_dp->pps.pps_idx < 0) {
intel_dp->pps.pps_idx = bxt_initial_pps_idx(display, pps_any);
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] no initial power sequencer, assuming %s\n",
encoder->base.base.id, encoder->base.name,
pps_name(intel_dp));
} else {
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] initial power sequencer: %s\n",
encoder->base.base.id, encoder->base.name,
pps_name(intel_dp));
}
return intel_pps_is_valid(intel_dp);
}
void intel_pps_reset_all(struct intel_display *display)
{
struct drm_i915_private *dev_priv = to_i915(display->drm);
struct intel_encoder *encoder;
if (drm_WARN_ON(display->drm, !IS_LP(dev_priv)))
return;
if (!HAS_DISPLAY(display))
return;
/*
* We can't grab pps_mutex here due to deadlock with power_domain
* mutex when power_domain functions are called while holding pps_mutex.
* That also means that in order to use pps_pipe the code needs to
* hold both a power domain reference and pps_mutex, and the power domain
* reference get/put must be done while _not_ holding pps_mutex.
* pps_{lock,unlock}() do these steps in the correct order, so one
* should use them always.
*/
for_each_intel_dp(display->drm, encoder) {
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
drm_WARN_ON(display->drm,
intel_dp->pps.active_pipe != INVALID_PIPE);
if (encoder->type != INTEL_OUTPUT_EDP)
continue;
if (DISPLAY_VER(display) >= 9)
intel_dp->pps.pps_reset = true;
else
intel_dp->pps.pps_pipe = INVALID_PIPE;
}
}
struct pps_registers {
i915_reg_t pp_ctrl;
i915_reg_t pp_stat;
i915_reg_t pp_on;
i915_reg_t pp_off;
i915_reg_t pp_div;
};
static void intel_pps_get_registers(struct intel_dp *intel_dp,
struct pps_registers *regs)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
int pps_idx;
memset(regs, 0, sizeof(*regs));
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
pps_idx = vlv_power_sequencer_pipe(intel_dp);
else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
pps_idx = bxt_power_sequencer_idx(intel_dp);
else
pps_idx = intel_dp->pps.pps_idx;
regs->pp_ctrl = PP_CONTROL(display, pps_idx);
regs->pp_stat = PP_STATUS(display, pps_idx);
regs->pp_on = PP_ON_DELAYS(display, pps_idx);
regs->pp_off = PP_OFF_DELAYS(display, pps_idx);
/* Cycle delay moved from PP_DIVISOR to PP_CONTROL */
if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv) ||
INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
regs->pp_div = INVALID_MMIO_REG;
else
regs->pp_div = PP_DIVISOR(display, pps_idx);
}
static i915_reg_t
_pp_ctrl_reg(struct intel_dp *intel_dp)
{
struct pps_registers regs;
intel_pps_get_registers(intel_dp, ®s);
return regs.pp_ctrl;
}
static i915_reg_t
_pp_stat_reg(struct intel_dp *intel_dp)
{
struct pps_registers regs;
intel_pps_get_registers(intel_dp, ®s);
return regs.pp_stat;
}
static bool edp_have_panel_power(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
lockdep_assert_held(&display->pps.mutex);
if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
intel_dp->pps.pps_pipe == INVALID_PIPE)
return false;
return (intel_de_read(display, _pp_stat_reg(intel_dp)) & PP_ON) != 0;
}
static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
lockdep_assert_held(&display->pps.mutex);
if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
intel_dp->pps.pps_pipe == INVALID_PIPE)
return false;
return intel_de_read(display, _pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
}
void intel_pps_check_power_unlocked(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
if (!intel_dp_is_edp(intel_dp))
return;
if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
drm_WARN(display->drm, 1,
"[ENCODER:%d:%s] %s powered off while attempting AUX CH communication.\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp),
intel_de_read(display, _pp_stat_reg(intel_dp)),
intel_de_read(display, _pp_ctrl_reg(intel_dp)));
}
}
#define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
#define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
#define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
#define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
#define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
#define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
static void intel_pps_verify_state(struct intel_dp *intel_dp);
static void wait_panel_status(struct intel_dp *intel_dp,
u32 mask, u32 value)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
i915_reg_t pp_stat_reg, pp_ctrl_reg;
lockdep_assert_held(&display->pps.mutex);
intel_pps_verify_state(intel_dp);
pp_stat_reg = _pp_stat_reg(intel_dp);
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s mask: 0x%08x value: 0x%08x PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp),
mask, value,
intel_de_read(display, pp_stat_reg),
intel_de_read(display, pp_ctrl_reg));
if (intel_de_wait(display, pp_stat_reg, mask, value, 5000))
drm_err(display->drm,
"[ENCODER:%d:%s] %s panel status timeout: PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp),
intel_de_read(display, pp_stat_reg),
intel_de_read(display, pp_ctrl_reg));
drm_dbg_kms(display->drm, "Wait complete\n");
}
static void wait_panel_on(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s wait for panel power on\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
}
static void wait_panel_off(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s wait for panel power off time\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
}
static void wait_panel_power_cycle(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
ktime_t panel_power_on_time;
s64 panel_power_off_duration;
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s wait for panel power cycle\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
/* take the difference of current time and panel power off time
* and then make panel wait for t11_t12 if needed. */
panel_power_on_time = ktime_get_boottime();
panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->pps.panel_power_off_time);
/* When we disable the VDD override bit last we have to do the manual
* wait. */
if (panel_power_off_duration < (s64)intel_dp->pps.panel_power_cycle_delay)
wait_remaining_ms_from_jiffies(jiffies,
intel_dp->pps.panel_power_cycle_delay - panel_power_off_duration);
wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
}
void intel_pps_wait_power_cycle(struct intel_dp *intel_dp)
{
intel_wakeref_t wakeref;
if (!intel_dp_is_edp(intel_dp))
return;
with_intel_pps_lock(intel_dp, wakeref)
wait_panel_power_cycle(intel_dp);
}
static void wait_backlight_on(struct intel_dp *intel_dp)
{
wait_remaining_ms_from_jiffies(intel_dp->pps.last_power_on,
intel_dp->pps.backlight_on_delay);
}
static void edp_wait_backlight_off(struct intel_dp *intel_dp)
{
wait_remaining_ms_from_jiffies(intel_dp->pps.last_backlight_off,
intel_dp->pps.backlight_off_delay);
}
/* Read the current pp_control value, unlocking the register if it
* is locked
*/
static u32 ilk_get_pp_control(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
u32 control;
lockdep_assert_held(&display->pps.mutex);
control = intel_de_read(display, _pp_ctrl_reg(intel_dp));
if (drm_WARN_ON(display->drm, !HAS_DDI(display) &&
(control & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS)) {
control &= ~PANEL_UNLOCK_MASK;
control |= PANEL_UNLOCK_REGS;
}
return control;
}
/*
* Must be paired with intel_pps_vdd_off_unlocked().
* Must hold pps_mutex around the whole on/off sequence.
* Can be nested with intel_pps_vdd_{on,off}() calls.
*/
bool intel_pps_vdd_on_unlocked(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
u32 pp;
i915_reg_t pp_stat_reg, pp_ctrl_reg;
bool need_to_disable = !intel_dp->pps.want_panel_vdd;
lockdep_assert_held(&display->pps.mutex);
if (!intel_dp_is_edp(intel_dp))
return false;
cancel_delayed_work(&intel_dp->pps.panel_vdd_work);
intel_dp->pps.want_panel_vdd = true;
if (edp_have_panel_vdd(intel_dp))
return need_to_disable;
drm_WARN_ON(display->drm, intel_dp->pps.vdd_wakeref);
intel_dp->pps.vdd_wakeref = intel_display_power_get(dev_priv,
intel_aux_power_domain(dig_port));
pp_stat_reg = _pp_stat_reg(intel_dp);
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
drm_dbg_kms(display->drm, "[ENCODER:%d:%s] %s turning VDD on\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
if (!edp_have_panel_power(intel_dp))
wait_panel_power_cycle(intel_dp);
pp = ilk_get_pp_control(intel_dp);
pp |= EDP_FORCE_VDD;
intel_de_write(display, pp_ctrl_reg, pp);
intel_de_posting_read(display, pp_ctrl_reg);
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp),
intel_de_read(display, pp_stat_reg),
intel_de_read(display, pp_ctrl_reg));
/*
* If the panel wasn't on, delay before accessing aux channel
*/
if (!edp_have_panel_power(intel_dp)) {
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s panel power wasn't enabled\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
msleep(intel_dp->pps.panel_power_up_delay);
}
return need_to_disable;
}
/*
* Must be paired with intel_pps_off().
* Nested calls to these functions are not allowed since
* we drop the lock. Caller must use some higher level
* locking to prevent nested calls from other threads.
*/
void intel_pps_vdd_on(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *i915 = to_i915(display->drm);
intel_wakeref_t wakeref;
bool vdd;
if (!intel_dp_is_edp(intel_dp))
return;
vdd = false;
with_intel_pps_lock(intel_dp, wakeref)
vdd = intel_pps_vdd_on_unlocked(intel_dp);
I915_STATE_WARN(i915, !vdd, "[ENCODER:%d:%s] %s VDD already requested on\n",
dp_to_dig_port(intel_dp)->base.base.base.id,
dp_to_dig_port(intel_dp)->base.base.name,
pps_name(intel_dp));
}
static void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
u32 pp;
i915_reg_t pp_stat_reg, pp_ctrl_reg;
lockdep_assert_held(&display->pps.mutex);
drm_WARN_ON(display->drm, intel_dp->pps.want_panel_vdd);
if (!edp_have_panel_vdd(intel_dp))
return;
drm_dbg_kms(display->drm, "[ENCODER:%d:%s] %s turning VDD off\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
pp = ilk_get_pp_control(intel_dp);
pp &= ~EDP_FORCE_VDD;
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
pp_stat_reg = _pp_stat_reg(intel_dp);
intel_de_write(display, pp_ctrl_reg, pp);
intel_de_posting_read(display, pp_ctrl_reg);
/* Make sure sequencer is idle before allowing subsequent activity */
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp),
intel_de_read(display, pp_stat_reg),
intel_de_read(display, pp_ctrl_reg));
if ((pp & PANEL_POWER_ON) == 0)
intel_dp->pps.panel_power_off_time = ktime_get_boottime();
intel_display_power_put(dev_priv,
intel_aux_power_domain(dig_port),
fetch_and_zero(&intel_dp->pps.vdd_wakeref));
}
void intel_pps_vdd_off_sync(struct intel_dp *intel_dp)
{
intel_wakeref_t wakeref;
if (!intel_dp_is_edp(intel_dp))
return;
cancel_delayed_work_sync(&intel_dp->pps.panel_vdd_work);
/*
* vdd might still be enabled due to the delayed vdd off.
* Make sure vdd is actually turned off here.
*/
with_intel_pps_lock(intel_dp, wakeref)
intel_pps_vdd_off_sync_unlocked(intel_dp);
}
static void edp_panel_vdd_work(struct work_struct *__work)
{
struct intel_pps *pps = container_of(to_delayed_work(__work),
struct intel_pps, panel_vdd_work);
struct intel_dp *intel_dp = container_of(pps, struct intel_dp, pps);
intel_wakeref_t wakeref;
with_intel_pps_lock(intel_dp, wakeref) {
if (!intel_dp->pps.want_panel_vdd)
intel_pps_vdd_off_sync_unlocked(intel_dp);
}
}
static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *i915 = to_i915(display->drm);
unsigned long delay;
/*
* We may not yet know the real power sequencing delays,
* so keep VDD enabled until we're done with init.
*/
if (intel_dp->pps.initializing)
return;
/*
* Queue the timer to fire a long time from now (relative to the power
* down delay) to keep the panel power up across a sequence of
* operations.
*/
delay = msecs_to_jiffies(intel_dp->pps.panel_power_cycle_delay * 5);
queue_delayed_work(i915->unordered_wq,
&intel_dp->pps.panel_vdd_work, delay);
}
/*
* Must be paired with edp_panel_vdd_on().
* Must hold pps_mutex around the whole on/off sequence.
* Can be nested with intel_pps_vdd_{on,off}() calls.
*/
void intel_pps_vdd_off_unlocked(struct intel_dp *intel_dp, bool sync)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
lockdep_assert_held(&display->pps.mutex);
if (!intel_dp_is_edp(intel_dp))
return;
I915_STATE_WARN(dev_priv, !intel_dp->pps.want_panel_vdd,
"[ENCODER:%d:%s] %s VDD not forced on",
dp_to_dig_port(intel_dp)->base.base.base.id,
dp_to_dig_port(intel_dp)->base.base.name,
pps_name(intel_dp));
intel_dp->pps.want_panel_vdd = false;
if (sync)
intel_pps_vdd_off_sync_unlocked(intel_dp);
else
edp_panel_vdd_schedule_off(intel_dp);
}
void intel_pps_on_unlocked(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
u32 pp;
i915_reg_t pp_ctrl_reg;
lockdep_assert_held(&display->pps.mutex);
if (!intel_dp_is_edp(intel_dp))
return;
drm_dbg_kms(display->drm, "[ENCODER:%d:%s] %s turn panel power on\n",
dp_to_dig_port(intel_dp)->base.base.base.id,
dp_to_dig_port(intel_dp)->base.base.name,
pps_name(intel_dp));
if (drm_WARN(display->drm, edp_have_panel_power(intel_dp),
"[ENCODER:%d:%s] %s panel power already on\n",
dp_to_dig_port(intel_dp)->base.base.base.id,
dp_to_dig_port(intel_dp)->base.base.name,
pps_name(intel_dp)))
return;
wait_panel_power_cycle(intel_dp);
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
pp = ilk_get_pp_control(intel_dp);
if (IS_IRONLAKE(dev_priv)) {
/* ILK workaround: disable reset around power sequence */
pp &= ~PANEL_POWER_RESET;
intel_de_write(display, pp_ctrl_reg, pp);
intel_de_posting_read(display, pp_ctrl_reg);
}
/*
* WA: 22019252566
* Disable DPLS gating around power sequence.
*/
if (IS_DISPLAY_VER(display, 13, 14))
intel_de_rmw(display, SOUTH_DSPCLK_GATE_D,
0, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
pp |= PANEL_POWER_ON;
if (!IS_IRONLAKE(dev_priv))
pp |= PANEL_POWER_RESET;
intel_de_write(display, pp_ctrl_reg, pp);
intel_de_posting_read(display, pp_ctrl_reg);
wait_panel_on(intel_dp);
intel_dp->pps.last_power_on = jiffies;
if (IS_DISPLAY_VER(display, 13, 14))
intel_de_rmw(display, SOUTH_DSPCLK_GATE_D,
PCH_DPLSUNIT_CLOCK_GATE_DISABLE, 0);
if (IS_IRONLAKE(dev_priv)) {
pp |= PANEL_POWER_RESET; /* restore panel reset bit */
intel_de_write(display, pp_ctrl_reg, pp);
intel_de_posting_read(display, pp_ctrl_reg);
}
}
void intel_pps_on(struct intel_dp *intel_dp)
{
intel_wakeref_t wakeref;
if (!intel_dp_is_edp(intel_dp))
return;
with_intel_pps_lock(intel_dp, wakeref)
intel_pps_on_unlocked(intel_dp);
}
void intel_pps_off_unlocked(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
u32 pp;
i915_reg_t pp_ctrl_reg;
lockdep_assert_held(&display->pps.mutex);
if (!intel_dp_is_edp(intel_dp))
return;
drm_dbg_kms(display->drm, "[ENCODER:%d:%s] %s turn panel power off\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
drm_WARN(display->drm, !intel_dp->pps.want_panel_vdd,
"[ENCODER:%d:%s] %s need VDD to turn off panel\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
pp = ilk_get_pp_control(intel_dp);
/* We need to switch off panel power _and_ force vdd, for otherwise some
* panels get very unhappy and cease to work. */
pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
EDP_BLC_ENABLE);
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
intel_dp->pps.want_panel_vdd = false;
intel_de_write(display, pp_ctrl_reg, pp);
intel_de_posting_read(display, pp_ctrl_reg);
wait_panel_off(intel_dp);
intel_dp->pps.panel_power_off_time = ktime_get_boottime();
/* We got a reference when we enabled the VDD. */
intel_display_power_put(dev_priv,
intel_aux_power_domain(dig_port),
fetch_and_zero(&intel_dp->pps.vdd_wakeref));
}
void intel_pps_off(struct intel_dp *intel_dp)
{
intel_wakeref_t wakeref;
if (!intel_dp_is_edp(intel_dp))
return;
with_intel_pps_lock(intel_dp, wakeref)
intel_pps_off_unlocked(intel_dp);
}
/* Enable backlight in the panel power control. */
void intel_pps_backlight_on(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
intel_wakeref_t wakeref;
/*
* If we enable the backlight right away following a panel power
* on, we may see slight flicker as the panel syncs with the eDP
* link. So delay a bit to make sure the image is solid before
* allowing it to appear.
*/
wait_backlight_on(intel_dp);
with_intel_pps_lock(intel_dp, wakeref) {
i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
u32 pp;
pp = ilk_get_pp_control(intel_dp);
pp |= EDP_BLC_ENABLE;
intel_de_write(display, pp_ctrl_reg, pp);
intel_de_posting_read(display, pp_ctrl_reg);
}
}
/* Disable backlight in the panel power control. */
void intel_pps_backlight_off(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
intel_wakeref_t wakeref;
if (!intel_dp_is_edp(intel_dp))
return;
with_intel_pps_lock(intel_dp, wakeref) {
i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
u32 pp;
pp = ilk_get_pp_control(intel_dp);
pp &= ~EDP_BLC_ENABLE;
intel_de_write(display, pp_ctrl_reg, pp);
intel_de_posting_read(display, pp_ctrl_reg);
}
intel_dp->pps.last_backlight_off = jiffies;
edp_wait_backlight_off(intel_dp);
}
/*
* Hook for controlling the panel power control backlight through the bl_power
* sysfs attribute. Take care to handle multiple calls.
*/
void intel_pps_backlight_power(struct intel_connector *connector, bool enable)
{
struct intel_display *display = to_intel_display(connector);
struct intel_dp *intel_dp = intel_attached_dp(connector);
intel_wakeref_t wakeref;
bool is_enabled;
is_enabled = false;
with_intel_pps_lock(intel_dp, wakeref)
is_enabled = ilk_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
if (is_enabled == enable)
return;
drm_dbg_kms(display->drm, "panel power control backlight %s\n",
enable ? "enable" : "disable");
if (enable)
intel_pps_backlight_on(intel_dp);
else
intel_pps_backlight_off(intel_dp);
}
static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
enum pipe pipe = intel_dp->pps.pps_pipe;
i915_reg_t pp_on_reg = PP_ON_DELAYS(display, pipe);
drm_WARN_ON(display->drm, intel_dp->pps.active_pipe != INVALID_PIPE);
if (drm_WARN_ON(display->drm, pipe != PIPE_A && pipe != PIPE_B))
return;
intel_pps_vdd_off_sync_unlocked(intel_dp);
/*
* VLV seems to get confused when multiple power sequencers
* have the same port selected (even if only one has power/vdd
* enabled). The failure manifests as vlv_wait_port_ready() failing
* CHV on the other hand doesn't seem to mind having the same port
* selected in multiple power sequencers, but let's clear the
* port select always when logically disconnecting a power sequencer
* from a port.
*/
drm_dbg_kms(display->drm,
"detaching %s from [ENCODER:%d:%s]\n",
pps_name(intel_dp),
dig_port->base.base.base.id, dig_port->base.base.name);
intel_de_write(display, pp_on_reg, 0);
intel_de_posting_read(display, pp_on_reg);
intel_dp->pps.pps_pipe = INVALID_PIPE;
}
static void vlv_steal_power_sequencer(struct intel_display *display,
enum pipe pipe)
{
struct intel_encoder *encoder;
lockdep_assert_held(&display->pps.mutex);
for_each_intel_dp(display->drm, encoder) {
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
drm_WARN(display->drm, intel_dp->pps.active_pipe == pipe,
"stealing PPS %c from active [ENCODER:%d:%s]\n",
pipe_name(pipe), encoder->base.base.id,
encoder->base.name);
if (intel_dp->pps.pps_pipe != pipe)
continue;
drm_dbg_kms(display->drm,
"stealing PPS %c from [ENCODER:%d:%s]\n",
pipe_name(pipe), encoder->base.base.id,
encoder->base.name);
/* make sure vdd is off before we steal it */
vlv_detach_power_sequencer(intel_dp);
}
}
void vlv_pps_init(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
lockdep_assert_held(&display->pps.mutex);
drm_WARN_ON(display->drm, intel_dp->pps.active_pipe != INVALID_PIPE);
if (intel_dp->pps.pps_pipe != INVALID_PIPE &&
intel_dp->pps.pps_pipe != crtc->pipe) {
/*
* If another power sequencer was being used on this
* port previously make sure to turn off vdd there while
* we still have control of it.
*/
vlv_detach_power_sequencer(intel_dp);
}
/*
* We may be stealing the power
* sequencer from another port.
*/
vlv_steal_power_sequencer(display, crtc->pipe);
intel_dp->pps.active_pipe = crtc->pipe;
if (!intel_dp_is_edp(intel_dp))
return;
/* now it's all ours */
intel_dp->pps.pps_pipe = crtc->pipe;
drm_dbg_kms(display->drm,
"initializing %s for [ENCODER:%d:%s]\n",
pps_name(intel_dp),
encoder->base.base.id, encoder->base.name);
/* init power sequencer on this pipe and port */
pps_init_delays(intel_dp);
pps_init_registers(intel_dp, true);
}
static void pps_vdd_init(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
lockdep_assert_held(&display->pps.mutex);
if (!edp_have_panel_vdd(intel_dp))
return;
/*
* The VDD bit needs a power domain reference, so if the bit is
* already enabled when we boot or resume, grab this reference and
* schedule a vdd off, so we don't hold on to the reference
* indefinitely.
*/
drm_dbg_kms(display->drm,
"[ENCODER:%d:%s] %s VDD left on by BIOS, adjusting state tracking\n",
dig_port->base.base.base.id, dig_port->base.base.name,
pps_name(intel_dp));
drm_WARN_ON(display->drm, intel_dp->pps.vdd_wakeref);
intel_dp->pps.vdd_wakeref = intel_display_power_get(dev_priv,
intel_aux_power_domain(dig_port));
}
bool intel_pps_have_panel_power_or_vdd(struct intel_dp *intel_dp)
{
intel_wakeref_t wakeref;
bool have_power = false;
with_intel_pps_lock(intel_dp, wakeref) {
have_power = edp_have_panel_power(intel_dp) ||
edp_have_panel_vdd(intel_dp);
}
return have_power;
}
static void pps_init_timestamps(struct intel_dp *intel_dp)
{
/*
* Initialize panel power off time to 0, assuming panel power could have
* been toggled between kernel boot and now only by a previously loaded
* and removed i915, which has already ensured sufficient power off
* delay at module remove.
*/
intel_dp->pps.panel_power_off_time = 0;
intel_dp->pps.last_power_on = jiffies;
intel_dp->pps.last_backlight_off = jiffies;
}
static void
intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq)
{
struct intel_display *display = to_intel_display(intel_dp);
u32 pp_on, pp_off, pp_ctl;
struct pps_registers regs;
intel_pps_get_registers(intel_dp, ®s);
pp_ctl = ilk_get_pp_control(intel_dp);
/* Ensure PPS is unlocked */
if (!HAS_DDI(display))
intel_de_write(display, regs.pp_ctrl, pp_ctl);
pp_on = intel_de_read(display, regs.pp_on);
pp_off = intel_de_read(display, regs.pp_off);
/* Pull timing values out of registers */
seq->t1_t3 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, pp_on);
seq->t8 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, pp_on);
seq->t9 = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, pp_off);
seq->t10 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, pp_off);
if (i915_mmio_reg_valid(regs.pp_div)) {
u32 pp_div;
pp_div = intel_de_read(display, regs.pp_div);
seq->t11_t12 = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, pp_div) * 1000;
} else {
seq->t11_t12 = REG_FIELD_GET(BXT_POWER_CYCLE_DELAY_MASK, pp_ctl) * 1000;
}
}
static void
intel_pps_dump_state(struct intel_dp *intel_dp, const char *state_name,
const struct edp_power_seq *seq)
{
struct intel_display *display = to_intel_display(intel_dp);
drm_dbg_kms(display->drm,
"%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
state_name,
seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
}
static void
intel_pps_verify_state(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct edp_power_seq hw;
struct edp_power_seq *sw = &intel_dp->pps.pps_delays;
intel_pps_readout_hw_state(intel_dp, &hw);
if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
drm_err(display->drm, "PPS state mismatch\n");
intel_pps_dump_state(intel_dp, "sw", sw);
intel_pps_dump_state(intel_dp, "hw", &hw);
}
}
static bool pps_delays_valid(struct edp_power_seq *delays)
{
return delays->t1_t3 || delays->t8 || delays->t9 ||
delays->t10 || delays->t11_t12;
}
static void pps_init_delays_bios(struct intel_dp *intel_dp,
struct edp_power_seq *bios)
{
struct intel_display *display = to_intel_display(intel_dp);
lockdep_assert_held(&display->pps.mutex);
if (!pps_delays_valid(&intel_dp->pps.bios_pps_delays))
intel_pps_readout_hw_state(intel_dp, &intel_dp->pps.bios_pps_delays);
*bios = intel_dp->pps.bios_pps_delays;
intel_pps_dump_state(intel_dp, "bios", bios);
}
static void pps_init_delays_vbt(struct intel_dp *intel_dp,
struct edp_power_seq *vbt)
{
struct intel_display *display = to_intel_display(intel_dp);
struct intel_connector *connector = intel_dp->attached_connector;
*vbt = connector->panel.vbt.edp.pps;
if (!pps_delays_valid(vbt))
return;
/* On Toshiba Satellite P50-C-18C system the VBT T12 delay
* of 500ms appears to be too short. Ocassionally the panel
* just fails to power back on. Increasing the delay to 800ms
* seems sufficient to avoid this problem.
*/
if (intel_has_quirk(display, QUIRK_INCREASE_T12_DELAY)) {
vbt->t11_t12 = max_t(u16, vbt->t11_t12, 1300 * 10);
drm_dbg_kms(display->drm,
"Increasing T12 panel delay as per the quirk to %d\n",
vbt->t11_t12);
}
/* T11_T12 delay is special and actually in units of 100ms, but zero
* based in the hw (so we need to add 100 ms). But the sw vbt
* table multiplies it with 1000 to make it in units of 100usec,
* too. */
vbt->t11_t12 += 100 * 10;
intel_pps_dump_state(intel_dp, "vbt", vbt);
}
static void pps_init_delays_spec(struct intel_dp *intel_dp,
struct edp_power_seq *spec)
{
struct intel_display *display = to_intel_display(intel_dp);
lockdep_assert_held(&display->pps.mutex);
/* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
* our hw here, which are all in 100usec. */
spec->t1_t3 = 210 * 10;
spec->t8 = 50 * 10; /* no limit for t8, use t7 instead */
spec->t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
spec->t10 = 500 * 10;
/* This one is special and actually in units of 100ms, but zero
* based in the hw (so we need to add 100 ms). But the sw vbt
* table multiplies it with 1000 to make it in units of 100usec,
* too. */
spec->t11_t12 = (510 + 100) * 10;
intel_pps_dump_state(intel_dp, "spec", spec);
}
static void pps_init_delays(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct edp_power_seq cur, vbt, spec,
*final = &intel_dp->pps.pps_delays;
lockdep_assert_held(&display->pps.mutex);
/* already initialized? */
if (pps_delays_valid(final))
return;
pps_init_delays_bios(intel_dp, &cur);
pps_init_delays_vbt(intel_dp, &vbt);
pps_init_delays_spec(intel_dp, &spec);
/* Use the max of the register settings and vbt. If both are
* unset, fall back to the spec limits. */
#define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
spec.field : \
max(cur.field, vbt.field))
assign_final(t1_t3);
assign_final(t8);
assign_final(t9);
assign_final(t10);
assign_final(t11_t12);
#undef assign_final
#define get_delay(field) (DIV_ROUND_UP(final->field, 10))
intel_dp->pps.panel_power_up_delay = get_delay(t1_t3);
intel_dp->pps.backlight_on_delay = get_delay(t8);
intel_dp->pps.backlight_off_delay = get_delay(t9);
intel_dp->pps.panel_power_down_delay = get_delay(t10);
intel_dp->pps.panel_power_cycle_delay = get_delay(t11_t12);
#undef get_delay
drm_dbg_kms(display->drm,
"panel power up delay %d, power down delay %d, power cycle delay %d\n",
intel_dp->pps.panel_power_up_delay,
intel_dp->pps.panel_power_down_delay,
intel_dp->pps.panel_power_cycle_delay);
drm_dbg_kms(display->drm, "backlight on delay %d, off delay %d\n",
intel_dp->pps.backlight_on_delay,
intel_dp->pps.backlight_off_delay);
/*
* We override the HW backlight delays to 1 because we do manual waits
* on them. For T8, even BSpec recommends doing it. For T9, if we
* don't do this, we'll end up waiting for the backlight off delay
* twice: once when we do the manual sleep, and once when we disable
* the panel and wait for the PP_STATUS bit to become zero.
*/
final->t8 = 1;
final->t9 = 1;
/*
* HW has only a 100msec granularity for t11_t12 so round it up
* accordingly.
*/
final->t11_t12 = roundup(final->t11_t12, 100 * 10);
}
static void pps_init_registers(struct intel_dp *intel_dp, bool force_disable_vdd)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *dev_priv = to_i915(display->drm);
u32 pp_on, pp_off, port_sel = 0;
int div = DISPLAY_RUNTIME_INFO(display)->rawclk_freq / 1000;
struct pps_registers regs;
enum port port = dp_to_dig_port(intel_dp)->base.port;
const struct edp_power_seq *seq = &intel_dp->pps.pps_delays;
lockdep_assert_held(&display->pps.mutex);
intel_pps_get_registers(intel_dp, ®s);
/*
* On some VLV machines the BIOS can leave the VDD
* enabled even on power sequencers which aren't
* hooked up to any port. This would mess up the
* power domain tracking the first time we pick
* one of these power sequencers for use since
* intel_pps_vdd_on_unlocked() would notice that the VDD was
* already on and therefore wouldn't grab the power
* domain reference. Disable VDD first to avoid this.
* This also avoids spuriously turning the VDD on as
* soon as the new power sequencer gets initialized.
*/
if (force_disable_vdd) {
u32 pp = ilk_get_pp_control(intel_dp);
drm_WARN(display->drm, pp & PANEL_POWER_ON,
"Panel power already on\n");
if (pp & EDP_FORCE_VDD)
drm_dbg_kms(display->drm,
"VDD already on, disabling first\n");
pp &= ~EDP_FORCE_VDD;
intel_de_write(display, regs.pp_ctrl, pp);
}
pp_on = REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, seq->t1_t3) |
REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, seq->t8);
pp_off = REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, seq->t9) |
REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, seq->t10);
/* Haswell doesn't have any port selection bits for the panel
* power sequencer any more. */
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
port_sel = PANEL_PORT_SELECT_VLV(port);
} else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
switch (port) {
case PORT_A:
port_sel = PANEL_PORT_SELECT_DPA;
break;
case PORT_C:
port_sel = PANEL_PORT_SELECT_DPC;
break;
case PORT_D:
port_sel = PANEL_PORT_SELECT_DPD;
break;
default:
MISSING_CASE(port);
break;
}
}
pp_on |= port_sel;
intel_de_write(display, regs.pp_on, pp_on);
intel_de_write(display, regs.pp_off, pp_off);
/*
* Compute the divisor for the pp clock, simply match the Bspec formula.
*/
if (i915_mmio_reg_valid(regs.pp_div))
intel_de_write(display, regs.pp_div,
REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, (100 * div) / 2 - 1) | REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000)));
else
intel_de_rmw(display, regs.pp_ctrl, BXT_POWER_CYCLE_DELAY_MASK,
REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK,
DIV_ROUND_UP(seq->t11_t12, 1000)));
drm_dbg_kms(display->drm,
"panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
intel_de_read(display, regs.pp_on),
intel_de_read(display, regs.pp_off),
i915_mmio_reg_valid(regs.pp_div) ?
intel_de_read(display, regs.pp_div) :
(intel_de_read(display, regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK));
}
void intel_pps_encoder_reset(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *i915 = to_i915(display->drm);
intel_wakeref_t wakeref;
if (!intel_dp_is_edp(intel_dp))
return;
with_intel_pps_lock(intel_dp, wakeref) {
/*
* Reinit the power sequencer also on the resume path, in case
* BIOS did something nasty with it.
*/
if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
vlv_initial_power_sequencer_setup(intel_dp);
pps_init_delays(intel_dp);
pps_init_registers(intel_dp, false);
pps_vdd_init(intel_dp);
if (edp_have_panel_vdd(intel_dp))
edp_panel_vdd_schedule_off(intel_dp);
}
}
bool intel_pps_init(struct intel_dp *intel_dp)
{
intel_wakeref_t wakeref;
bool ret;
intel_dp->pps.initializing = true;
INIT_DELAYED_WORK(&intel_dp->pps.panel_vdd_work, edp_panel_vdd_work);
pps_init_timestamps(intel_dp);
with_intel_pps_lock(intel_dp, wakeref) {
ret = pps_initial_setup(intel_dp);
pps_init_delays(intel_dp);
pps_init_registers(intel_dp, false);
pps_vdd_init(intel_dp);
}
return ret;
}
static void pps_init_late(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
struct drm_i915_private *i915 = to_i915(display->drm);
struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
struct intel_connector *connector = intel_dp->attached_connector;
if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
return;
if (intel_num_pps(display) < 2)
return;
drm_WARN(display->drm,
connector->panel.vbt.backlight.controller >= 0 &&
intel_dp->pps.pps_idx != connector->panel.vbt.backlight.controller,
"[ENCODER:%d:%s] power sequencer mismatch: %d (initial) vs. %d (VBT)\n",
encoder->base.base.id, encoder->base.name,
intel_dp->pps.pps_idx, connector->panel.vbt.backlight.controller);
if (connector->panel.vbt.backlight.controller >= 0)
intel_dp->pps.pps_idx = connector->panel.vbt.backlight.controller;
}
void intel_pps_init_late(struct intel_dp *intel_dp)
{
intel_wakeref_t wakeref;
with_intel_pps_lock(intel_dp, wakeref) {
/* Reinit delays after per-panel info has been parsed from VBT */
pps_init_late(intel_dp);
memset(&intel_dp->pps.pps_delays, 0, sizeof(intel_dp->pps.pps_delays));
pps_init_delays(intel_dp);
pps_init_registers(intel_dp, false);
intel_dp->pps.initializing = false;
if (edp_have_panel_vdd(intel_dp))
edp_panel_vdd_schedule_off(intel_dp);
}
}
void intel_pps_unlock_regs_wa(struct intel_display *display)
{
int pps_num;
int pps_idx;
if (!HAS_DISPLAY(display) || HAS_DDI(display))
return;
/*
* This w/a is needed at least on CPT/PPT, but to be sure apply it
* everywhere where registers can be write protected.
*/
pps_num = intel_num_pps(display);
for (pps_idx = 0; pps_idx < pps_num; pps_idx++)
intel_de_rmw(display, PP_CONTROL(display, pps_idx),
PANEL_UNLOCK_MASK, PANEL_UNLOCK_REGS);
}
void intel_pps_setup(struct intel_display *display)
{
struct drm_i915_private *i915 = to_i915(display->drm);
if (HAS_PCH_SPLIT(i915) || IS_GEMINILAKE(i915) || IS_BROXTON(i915))
display->pps.mmio_base = PCH_PPS_BASE;
else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
display->pps.mmio_base = VLV_PPS_BASE;
else
display->pps.mmio_base = PPS_BASE;
}
static int intel_pps_show(struct seq_file *m, void *data)
{
struct intel_connector *connector = m->private;
struct intel_dp *intel_dp = intel_attached_dp(connector);
if (connector->base.status != connector_status_connected)
return -ENODEV;
seq_printf(m, "Panel power up delay: %d\n",
intel_dp->pps.panel_power_up_delay);
seq_printf(m, "Panel power down delay: %d\n",
intel_dp->pps.panel_power_down_delay);
seq_printf(m, "Backlight on delay: %d\n",
intel_dp->pps.backlight_on_delay);
seq_printf(m, "Backlight off delay: %d\n",
intel_dp->pps.backlight_off_delay);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(intel_pps);
void intel_pps_connector_debugfs_add(struct intel_connector *connector)
{
struct dentry *root = connector->base.debugfs_entry;
int connector_type = connector->base.connector_type;
if (connector_type == DRM_MODE_CONNECTOR_eDP)
debugfs_create_file("i915_panel_timings", 0444, root,
connector, &intel_pps_fops);
}
void assert_pps_unlocked(struct intel_display *display, enum pipe pipe)
{
struct drm_i915_private *dev_priv = to_i915(display->drm);
i915_reg_t pp_reg;
u32 val;
enum pipe panel_pipe = INVALID_PIPE;
bool locked = true;
if (drm_WARN_ON(display->drm, HAS_DDI(display)))
return;
if (HAS_PCH_SPLIT(dev_priv)) {
u32 port_sel;
pp_reg = PP_CONTROL(display, 0);
port_sel = intel_de_read(display, PP_ON_DELAYS(display, 0)) &
PANEL_PORT_SELECT_MASK;
switch (port_sel) {
case PANEL_PORT_SELECT_LVDS:
intel_lvds_port_enabled(dev_priv, PCH_LVDS, &panel_pipe);
break;
case PANEL_PORT_SELECT_DPA:
g4x_dp_port_enabled(dev_priv, DP_A, PORT_A, &panel_pipe);
break;
case PANEL_PORT_SELECT_DPC:
g4x_dp_port_enabled(dev_priv, PCH_DP_C, PORT_C, &panel_pipe);
break;
case PANEL_PORT_SELECT_DPD:
g4x_dp_port_enabled(dev_priv, PCH_DP_D, PORT_D, &panel_pipe);
break;
default:
MISSING_CASE(port_sel);
break;
}
} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
/* presumably write lock depends on pipe, not port select */
pp_reg = PP_CONTROL(display, pipe);
panel_pipe = pipe;
} else {
u32 port_sel;
pp_reg = PP_CONTROL(display, 0);
port_sel = intel_de_read(display, PP_ON_DELAYS(display, 0)) &
PANEL_PORT_SELECT_MASK;
drm_WARN_ON(display->drm,
port_sel != PANEL_PORT_SELECT_LVDS);
intel_lvds_port_enabled(dev_priv, LVDS, &panel_pipe);
}
val = intel_de_read(display, pp_reg);
if (!(val & PANEL_POWER_ON) ||
((val & PANEL_UNLOCK_MASK) == PANEL_UNLOCK_REGS))
locked = false;
I915_STATE_WARN(dev_priv, panel_pipe == pipe && locked,
"panel assertion failure, pipe %c regs locked\n",
pipe_name(pipe));
}
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