[Intel-gfx] [PATCH 7/8] drm/i915: Add functions to get a power well's state/name/domains/mask/refcount

Imre Deak
2022-02-22T16:52:00Z

Add functions to get a power well's actual- and cached-enabled state,
name, domain mask and refcount, as a step towards making the low-level
power well internals (i915_power_well_ops/desc structs) hidden.

No functional change.

Suggested-by: Jani Nikula <jani.nikula@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
---
.../drm/i915/display/intel_display_power.c | 69 +++++++++----------
.../i915/display/intel_display_power_well.c | 31 +++++++++
.../i915/display/intel_display_power_well.h | 7 ++
3 files changed, 72 insertions(+), 35 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index b8b914d8f0b56..a7aa4a4277236 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -192,10 +192,10 @@ bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
is_enabled = true;

for_each_power_domain_well_reverse(dev_priv, power_well, BIT_ULL(domain)) {
- if (power_well->desc->always_on)
+ if (intel_power_well_is_always_on(power_well))
continue;

- if (!power_well->hw_enabled) {
+ if (!intel_power_well_is_enabled_cached(power_well)) {
is_enabled = false;
break;
}
@@ -331,7 +331,7 @@ static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
if (intel_de_wait_for_set(dev_priv, regs->driver,
HSW_PWR_WELL_CTL_STATE(pw_idx), 1)) {
drm_dbg_kms(&dev_priv->drm, "%s power well enable timeout\n",
- power_well->desc->name);
+ intel_power_well_name(power_well));

drm_WARN_ON(&dev_priv->drm, !timeout_expected);

@@ -379,7 +379,7 @@ static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,

drm_dbg_kms(&dev_priv->drm,
"%s forced on (bios:%d driver:%d kvmr:%d debug:%d)\n",
- power_well->desc->name,
+ intel_power_well_name(power_well),
!!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8));
}

@@ -968,8 +968,7 @@ void intel_display_power_set_target_dc_state(struct drm_i915_private *dev_priv,
if (state == dev_priv->dmc.target_dc_state)
goto unlock;

- dc_off_enabled = power_well->desc->ops->is_enabled(dev_priv,
- power_well);
+ dc_off_enabled = intel_power_well_is_enabled(dev_priv, power_well);
/*
* If DC off power well is disabled, need to enable and disable the
* DC off power well to effect target DC state.
@@ -1091,17 +1090,17 @@ static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv)
struct i915_power_well *power_well;

power_well = lookup_power_well(dev_priv, BXT_DISP_PW_DPIO_CMN_A);
- if (power_well->count > 0)
+ if (intel_power_well_refcount(power_well) > 0)
bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);

power_well = lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
- if (power_well->count > 0)
+ if (intel_power_well_refcount(power_well) > 0)
bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);

if (IS_GEMINILAKE(dev_priv)) {
power_well = lookup_power_well(dev_priv,
GLK_DISP_PW_DPIO_CMN_C);
- if (power_well->count > 0)
+ if (intel_power_well_refcount(power_well) > 0)
bxt_ddi_phy_verify_state(dev_priv,
power_well->desc->bxt.phy);
}
@@ -1227,7 +1226,7 @@ static bool i830_pipes_power_well_enabled(struct drm_i915_private *dev_priv,
static void i830_pipes_power_well_sync_hw(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
- if (power_well->count > 0)
+ if (intel_power_well_refcount(power_well) > 0)
i830_pipes_power_well_enable(dev_priv, power_well);
else
i830_pipes_power_well_disable(dev_priv, power_well);
@@ -1500,7 +1499,7 @@ static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) |
PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1));

- if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
+ if (intel_power_well_is_enabled(dev_priv, cmn_bc)) {
phy_status |= PHY_POWERGOOD(DPIO_PHY0);

/* this assumes override is only used to enable lanes */
@@ -1541,7 +1540,7 @@ static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1);
}

- if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
+ if (intel_power_well_is_enabled(dev_priv, cmn_d)) {
phy_status |= PHY_POWERGOOD(DPIO_PHY1);

/* this assumes override is only used to enable lanes */
@@ -3335,12 +3334,10 @@ bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
enum i915_power_well_id power_well_id)
{
struct i915_power_well *power_well;
- bool ret;

power_well = lookup_power_well(dev_priv, power_well_id);
- ret = power_well->desc->ops->is_enabled(dev_priv, power_well);

- return ret;
+ return intel_power_well_is_enabled(dev_priv, power_well);
}

static const struct i915_power_well_desc skl_power_wells[] = {
@@ -3910,7 +3907,7 @@ static void
tgl_tc_cold_off_power_well_sync_hw(struct drm_i915_private *i915,
struct i915_power_well *power_well)
{
- if (power_well->count > 0)
+ if (intel_power_well_refcount(power_well) > 0)
tgl_tc_cold_off_power_well_enable(i915, power_well);
else
tgl_tc_cold_off_power_well_disable(i915, power_well);
@@ -3924,7 +3921,7 @@ tgl_tc_cold_off_power_well_is_enabled(struct drm_i915_private *dev_priv,
* Not the correctly implementation but there is no way to just read it
* from PCODE, so returning count to avoid state mismatch errors
*/
- return power_well->count;
+ return intel_power_well_refcount(power_well);
}

static const struct i915_power_well_ops tgl_tc_cold_off_ops = {
@@ -5730,7 +5727,7 @@ static void chv_phy_control_init(struct drm_i915_private *dev_priv)
* override and set the lane powerdown bits accding to the
* current lane status.
*/
- if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
+ if (intel_power_well_is_enabled(dev_priv, cmn_bc)) {
u32 status = intel_de_read(dev_priv, DPLL(PIPE_A));
unsigned int mask;

@@ -5761,7 +5758,7 @@ static void chv_phy_control_init(struct drm_i915_private *dev_priv)
dev_priv->chv_phy_assert[DPIO_PHY0] = true;
}

- if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
+ if (intel_power_well_is_enabled(dev_priv, cmn_d)) {
u32 status = intel_de_read(dev_priv, DPIO_PHY_STATUS);
unsigned int mask;

@@ -5797,8 +5794,8 @@ static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
lookup_power_well(dev_priv, VLV_DISP_PW_DISP2D);

/* If the display might be already active skip this */
- if (cmn->desc->ops->is_enabled(dev_priv, cmn) &&
- disp2d->desc->ops->is_enabled(dev_priv, disp2d) &&
+ if (intel_power_well_is_enabled(dev_priv, cmn) &&
+ intel_power_well_is_enabled(dev_priv, disp2d) &&
intel_de_read(dev_priv, DPIO_CTL) & DPIO_CMNRST)
return;

@@ -5965,12 +5962,12 @@ void intel_power_domains_sanitize_state(struct drm_i915_private *i915)

for_each_power_well_reverse(i915, power_well) {
if (power_well->desc->always_on || power_well->count ||
- !power_well->desc->ops->is_enabled(i915, power_well))
+ !intel_power_well_is_enabled(i915, power_well))
continue;

drm_dbg_kms(&i915->drm,
"BIOS left unused %s power well enabled, disabling it\n",
- power_well->desc->name);
+ intel_power_well_name(power_well));
intel_power_well_disable(i915, power_well);
}

@@ -6109,9 +6106,9 @@ static void intel_power_domains_dump_info(struct drm_i915_private *i915)
enum intel_display_power_domain domain;

drm_dbg(&i915->drm, "%-25s %d\n",
- power_well->desc->name, power_well->count);
+ intel_power_well_name(power_well), intel_power_well_refcount(power_well));

- for_each_power_domain(domain, power_well->desc->domains)
+ for_each_power_domain(domain, intel_power_well_domains(power_well))
drm_dbg(&i915->drm, " %-23s %d\n",
intel_display_power_domain_str(domain),
power_domains->domain_use_count[domain]);
@@ -6144,23 +6141,25 @@ static void intel_power_domains_verify_state(struct drm_i915_private *i915)
int domains_count;
bool enabled;

- enabled = power_well->desc->ops->is_enabled(i915, power_well);
- if ((power_well->count || power_well->desc->always_on) !=
+ enabled = intel_power_well_is_enabled(i915, power_well);
+ if ((intel_power_well_refcount(power_well) ||
+ intel_power_well_is_always_on(power_well)) !=
enabled)
drm_err(&i915->drm,
"power well %s state mismatch (refcount %d/enabled %d)",
- power_well->desc->name,
- power_well->count, enabled);
+ intel_power_well_name(power_well),
+ intel_power_well_refcount(power_well), enabled);

domains_count = 0;
- for_each_power_domain(domain, power_well->desc->domains)
+ for_each_power_domain(domain, intel_power_well_domains(power_well))
domains_count += power_domains->domain_use_count[domain];

- if (power_well->count != domains_count) {
+ if (intel_power_well_refcount(power_well) != domains_count) {
drm_err(&i915->drm,
"power well %s refcount/domain refcount mismatch "
"(refcount %d/domains refcount %d)\n",
- power_well->desc->name, power_well->count,
+ intel_power_well_name(power_well),
+ intel_power_well_refcount(power_well),
domains_count);
dump_domain_info = true;
}
@@ -6265,10 +6264,10 @@ void intel_display_power_debug(struct drm_i915_private *i915, struct seq_file *m
enum intel_display_power_domain power_domain;

power_well = &power_domains->power_wells[i];
- seq_printf(m, "%-25s %d\n", power_well->desc->name,
- power_well->count);
+ seq_printf(m, "%-25s %d\n", intel_power_well_name(power_well),
+ intel_power_well_refcount(power_well));

- for_each_power_domain(power_domain, power_well->desc->domains)
+ for_each_power_domain(power_domain, intel_power_well_domains(power_well))
seq_printf(m, " %-23s %d\n",
intel_display_power_domain_str(power_domain),
power_domains->domain_use_count[power_domain]);
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c b/drivers/gpu/drm/i915/display/intel_display_power_well.c
index 63b97bcc64bc3..415ad193a8e83 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
@@ -47,3 +47,34 @@ void intel_power_well_put(struct drm_i915_private *i915,
if (!--power_well->count)
intel_power_well_disable(i915, power_well);
}
+
+bool intel_power_well_is_enabled(struct drm_i915_private *i915,
+ struct i915_power_well *power_well)
+{
+ return power_well->desc->ops->is_enabled(i915, power_well);
+}
+
+bool intel_power_well_is_enabled_cached(struct i915_power_well *power_well)
+{
+ return power_well->hw_enabled;
+}
+
+bool intel_power_well_is_always_on(struct i915_power_well *power_well)
+{
+ return power_well->desc->always_on;
+}
+
+const char *intel_power_well_name(struct i915_power_well *power_well)
+{
+ return power_well->desc->name;
+}
+
+u64 intel_power_well_domains(struct i915_power_well *power_well)
+{
+ return power_well->desc->domains;
+}
+
+int intel_power_well_refcount(struct i915_power_well *power_well)
+{
+ return power_well->count;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.h b/drivers/gpu/drm/i915/display/intel_display_power_well.h
index ba5bbd36f7fc0..43affbdbc48c1 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.h
@@ -113,5 +113,12 @@ void intel_power_well_get(struct drm_i915_private *i915,
struct i915_power_well *power_well);
void intel_power_well_put(struct drm_i915_private *i915,
struct i915_power_well *power_well);
+bool intel_power_well_is_enabled(struct drm_i915_private *i915,
+ struct i915_power_well *power_well);
+bool intel_power_well_is_enabled_cached(struct i915_power_well *power_well);
+bool intel_power_well_is_always_on(struct i915_power_well *power_well);
+const char *intel_power_well_name(struct i915_power_well *power_well);
+u64 intel_power_well_domains(struct i915_power_well *power_well);
+int intel_power_well_refcount(struct i915_power_well *power_well);

#endif
--
2.27.0