[PATCH 07/12][SRU][U/OEM-5.14] drm/i915/tc: Refactor TC-cold block/unblock helpers
Chris Chiu
chris.chiu at canonical.com
Wed Nov 24 10:23:10 UTC 2021
From: Imre Deak <imre.deak at intel.com>
BugLink: https://bugs.launchpad.net/bugs/1952041
A follow-up change will select the TC-cold blocking power domain based
on the TypeC mode, prepare for that here.
Also bring intel_tc_cold_requires_aux_pw() earlier to its logical place
for readability.
No functional change.
v2: Add code comment about IOM reg accesses in TCCOLD. (Jose)
Cc: José Roberto de Souza <jose.souza at intel.com>
Signed-off-by: Imre Deak <imre.deak at intel.com>
Reviewed-by: José Roberto de Souza <jose.souza at intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210929132833.2253961-4-imre.deak@intel.com
(cherry picked from commit d0bc677056bd9de6eb731dd8bff889a5fe36e381)
Signed-off-by: Chris Chiu <chris.chiu at canonical.com>
---
.../drm/i915/display/intel_display_types.h | 2 +
drivers/gpu/drm/i915/display/intel_tc.c | 68 ++++++++++++-------
2 files changed, 44 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 118da8eeaffc..025c58c2f47c 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1651,8 +1651,10 @@ struct intel_digital_port {
enum intel_display_power_domain ddi_io_power_domain;
intel_wakeref_t ddi_io_wakeref;
intel_wakeref_t aux_wakeref;
+
struct mutex tc_lock; /* protects the TypeC port mode */
intel_wakeref_t tc_lock_wakeref;
+ enum intel_display_power_domain tc_lock_power_domain;
int tc_link_refcount;
bool tc_legacy_port:1;
char tc_port_name[8];
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
index 62a3070abf0a..69c917fce03e 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.c
+++ b/drivers/gpu/drm/i915/display/intel_tc.c
@@ -48,8 +48,16 @@ bool intel_tc_port_in_legacy_mode(struct intel_digital_port *dig_port)
return intel_tc_port_in_mode(dig_port, TC_PORT_LEGACY);
}
+bool intel_tc_cold_requires_aux_pw(struct intel_digital_port *dig_port)
+{
+ struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
+
+ return (DISPLAY_VER(i915) == 11 && dig_port->tc_legacy_port) ||
+ IS_ALDERLAKE_P(i915);
+}
+
static enum intel_display_power_domain
-tc_cold_get_power_domain(struct intel_digital_port *dig_port)
+tc_cold_get_power_domain(struct intel_digital_port *dig_port, enum tc_port_mode mode)
{
if (intel_tc_cold_requires_aux_pw(dig_port))
return intel_legacy_aux_to_power_domain(dig_port->aux_ch);
@@ -58,23 +66,30 @@ tc_cold_get_power_domain(struct intel_digital_port *dig_port)
}
static intel_wakeref_t
-tc_cold_block(struct intel_digital_port *dig_port)
+tc_cold_block_in_mode(struct intel_digital_port *dig_port, enum tc_port_mode mode,
+ enum intel_display_power_domain *domain)
{
struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
- enum intel_display_power_domain domain;
if (DISPLAY_VER(i915) == 11 && !dig_port->tc_legacy_port)
return 0;
- domain = tc_cold_get_power_domain(dig_port);
- return intel_display_power_get(i915, domain);
+ *domain = tc_cold_get_power_domain(dig_port, mode);
+
+ return intel_display_power_get(i915, *domain);
+}
+
+static intel_wakeref_t
+tc_cold_block(struct intel_digital_port *dig_port, enum intel_display_power_domain *domain)
+{
+ return tc_cold_block_in_mode(dig_port, dig_port->tc_mode, domain);
}
static void
-tc_cold_unblock(struct intel_digital_port *dig_port, intel_wakeref_t wakeref)
+tc_cold_unblock(struct intel_digital_port *dig_port, enum intel_display_power_domain domain,
+ intel_wakeref_t wakeref)
{
struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
- enum intel_display_power_domain domain;
/*
* wakeref == -1, means some error happened saving save_depot_stack but
@@ -84,8 +99,7 @@ tc_cold_unblock(struct intel_digital_port *dig_port, intel_wakeref_t wakeref)
if (wakeref == 0)
return;
- domain = tc_cold_get_power_domain(dig_port);
- intel_display_power_put_async(i915, domain, wakeref);
+ intel_display_power_put(i915, domain, wakeref);
}
static void
@@ -98,7 +112,8 @@ assert_tc_cold_blocked(struct intel_digital_port *dig_port)
return;
enabled = intel_display_power_is_enabled(i915,
- tc_cold_get_power_domain(dig_port));
+ tc_cold_get_power_domain(dig_port,
+ dig_port->tc_mode));
drm_WARN_ON(&i915->drm, !enabled);
}
@@ -269,6 +284,11 @@ static u32 adl_tc_port_live_status_mask(struct intel_digital_port *dig_port)
struct intel_uncore *uncore = &i915->uncore;
u32 val, mask = 0;
+ /*
+ * On ADL-P HW/FW will wake from TCCOLD to complete the read access of
+ * registers in IOM. Note that this doesn't apply to PHY and FIA
+ * registers.
+ */
val = intel_uncore_read(uncore, TCSS_DDI_STATUS(tc_port));
if (val & TCSS_DDI_STATUS_HPD_LIVE_STATUS_ALT)
mask |= BIT(TC_PORT_DP_ALT);
@@ -650,7 +670,8 @@ void intel_tc_port_sanitize(struct intel_digital_port *dig_port)
drm_WARN_ON(&i915->drm, dig_port->tc_mode != TC_PORT_DISCONNECTED);
if (active_links) {
- intel_wakeref_t tc_cold_wref = tc_cold_block(dig_port);
+ enum intel_display_power_domain domain;
+ intel_wakeref_t tc_cold_wref = tc_cold_block(dig_port, &domain);
dig_port->tc_mode = intel_tc_port_get_current_mode(dig_port);
@@ -660,7 +681,7 @@ void intel_tc_port_sanitize(struct intel_digital_port *dig_port)
dig_port->tc_port_name, active_links);
intel_tc_port_link_init_refcount(dig_port, active_links);
- tc_cold_unblock(dig_port, tc_cold_wref);
+ tc_cold_unblock(dig_port, domain, tc_cold_wref);
}
drm_dbg_kms(&i915->drm, "Port %s: sanitize mode (%s)\n",
@@ -689,15 +710,16 @@ bool intel_tc_port_connected(struct intel_encoder *encoder)
{
struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
bool is_connected;
+ enum intel_display_power_domain domain;
intel_wakeref_t tc_cold_wref;
intel_tc_port_lock(dig_port);
- tc_cold_wref = tc_cold_block(dig_port);
+ tc_cold_wref = tc_cold_block(dig_port, &domain);
is_connected = tc_port_live_status_mask(dig_port) &
BIT(dig_port->tc_mode);
- tc_cold_unblock(dig_port, tc_cold_wref);
+ tc_cold_unblock(dig_port, domain, tc_cold_wref);
intel_tc_port_unlock(dig_port);
return is_connected;
@@ -714,15 +736,16 @@ static void __intel_tc_port_lock(struct intel_digital_port *dig_port,
mutex_lock(&dig_port->tc_lock);
if (!dig_port->tc_link_refcount) {
+ enum intel_display_power_domain domain;
intel_wakeref_t tc_cold_wref;
- tc_cold_wref = tc_cold_block(dig_port);
+ tc_cold_wref = tc_cold_block(dig_port, &domain);
if (force_disconnect || intel_tc_port_needs_reset(dig_port))
intel_tc_port_reset_mode(dig_port, required_lanes,
force_disconnect);
- tc_cold_unblock(dig_port, tc_cold_wref);
+ tc_cold_unblock(dig_port, domain, tc_cold_wref);
}
drm_WARN_ON(&i915->drm, dig_port->tc_lock_wakeref);
@@ -787,6 +810,7 @@ void intel_tc_port_put_link(struct intel_digital_port *dig_port)
static bool
tc_has_modular_fia(struct drm_i915_private *i915, struct intel_digital_port *dig_port)
{
+ enum intel_display_power_domain domain;
intel_wakeref_t wakeref;
u32 val;
@@ -794,9 +818,9 @@ tc_has_modular_fia(struct drm_i915_private *i915, struct intel_digital_port *dig
return false;
mutex_lock(&dig_port->tc_lock);
- wakeref = tc_cold_block(dig_port);
+ wakeref = tc_cold_block(dig_port, &domain);
val = intel_uncore_read(&i915->uncore, PORT_TX_DFLEXDPSP(FIA1));
- tc_cold_unblock(dig_port, wakeref);
+ tc_cold_unblock(dig_port, domain, wakeref);
mutex_unlock(&dig_port->tc_lock);
drm_WARN_ON(&i915->drm, val == 0xffffffff);
@@ -841,11 +865,3 @@ void intel_tc_port_init(struct intel_digital_port *dig_port, bool is_legacy)
dig_port->tc_link_refcount = 0;
tc_port_load_fia_params(i915, dig_port);
}
-
-bool intel_tc_cold_requires_aux_pw(struct intel_digital_port *dig_port)
-{
- struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
-
- return (DISPLAY_VER(i915) == 11 && dig_port->tc_legacy_port) ||
- IS_ALDERLAKE_P(i915);
-}
--
2.25.1
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