[Intel-gfx] [PATCH 40/56] drm/i915/adl_p: MBUS programming
Matt Roper
matthew.d.roper at intel.com
Thu Mar 11 22:36:16 UTC 2021
From: Vandita Kulkarni <vandita.kulkarni at intel.com>
Update MBUS_CTL register if the 2 mbus can be joined as per the current
DDB allocation and active pipes, also update hashing mode and pipe
select bits as per the sequence mentioned in the bspec.
Cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
Cc: José Roberto de Souza <jose.souza at intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni at intel.com>
Signed-off-by: Clinton Taylor <Clinton.A.Taylor at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
drivers/gpu/drm/i915/display/intel_atomic.c | 20 +++++
drivers/gpu/drm/i915/display/intel_atomic.h | 1 +
drivers/gpu/drm/i915/display/intel_display.c | 3 +
drivers/gpu/drm/i915/i915_reg.h | 11 +++
drivers/gpu/drm/i915/intel_pm.c | 93 ++++++++++++++++++--
drivers/gpu/drm/i915/intel_pm.h | 2 +-
6 files changed, 121 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index d0b5414127df..580244abf62d 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -198,6 +198,26 @@ intel_connector_needs_modeset(struct intel_atomic_state *state,
new_conn_state->crtc)));
}
+/**
+ * intel_any_crtc_needs_modeset - check if any CRTC needs a modeset
+ * @state: the atomic state corresponding to this modeset
+ *
+ * Returns true if any CRTC in @state needs a modeset.
+ */
+bool intel_any_crtc_needs_modeset(struct intel_atomic_state *state)
+{
+ struct intel_crtc *crtc;
+ struct intel_crtc_state *crtc_state;
+ int i;
+
+ for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+ if (intel_crtc_needs_modeset(crtc_state))
+ return true;
+ }
+
+ return false;
+}
+
struct intel_digital_connector_state *
intel_atomic_get_digital_connector_state(struct intel_atomic_state *state,
struct intel_connector *connector)
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.h b/drivers/gpu/drm/i915/display/intel_atomic.h
index 62a3365ed5e6..d2700c74c9da 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.h
+++ b/drivers/gpu/drm/i915/display/intel_atomic.h
@@ -35,6 +35,7 @@ struct drm_connector_state *
intel_digital_connector_duplicate_state(struct drm_connector *connector);
bool intel_connector_needs_modeset(struct intel_atomic_state *state,
struct drm_connector *connector);
+bool intel_any_crtc_needs_modeset(struct intel_atomic_state *state);
struct intel_digital_connector_state *
intel_atomic_get_digital_connector_state(struct intel_atomic_state *state,
struct intel_connector *connector);
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index cbad75deadd0..d779c1c38a41 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -10456,6 +10456,9 @@ static int intel_atomic_check(struct drm_device *dev,
if (ret)
goto fail;
+ if (intel_any_crtc_needs_modeset(state))
+ any_ms = true;
+
if (any_ms) {
ret = intel_modeset_checks(state);
if (ret)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 70b097ddae28..a447f3882bd7 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2929,6 +2929,15 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
#define MBUS_BBOX_CTL_S1 _MMIO(0x45040)
#define MBUS_BBOX_CTL_S2 _MMIO(0x45044)
+#define MBUS_CTL _MMIO(0x4438C)
+#define MBUS_JOIN REG_BIT(31)
+#define MBUS_HASHING_MODE_MASK REG_BIT(30)
+#define MBUS_HASHING_MODE_2x2 REG_FIELD_PREP(MBUS_HASHING_MODE_MASK, 0)
+#define MBUS_HASHING_MODE_1x4 REG_FIELD_PREP(MBUS_HASHING_MODE_MASK, 1)
+#define MBUS_JOIN_PIPE_SELECT_MASK REG_GENMASK(28, 26)
+#define MBUS_JOIN_PIPE_SELECT(pipe) REG_FIELD_PREP(MBUS_JOIN_PIPE_SELECT_MASK, pipe)
+#define MBUS_JOIN_PIPE_SELECT_NONE MBUS_JOIN_PIPE_SELECT(7)
+
#define HDPORT_STATE _MMIO(0x45050)
#define HDPORT_DPLL_USED_MASK REG_GENMASK(15, 12)
#define HDPORT_DDI_USED(phy) REG_BIT(2 * (phy) + 1)
@@ -8136,6 +8145,8 @@ enum {
#define DBUF_POWER_STATE REG_BIT(30)
#define DBUF_TRACKER_STATE_SERVICE_MASK REG_GENMASK(23, 19)
#define DBUF_TRACKER_STATE_SERVICE(x) REG_FIELD_PREP(DBUF_TRACKER_STATE_SERVICE_MASK, x)
+#define DBUF_MIN_TRACKER_STATE_SERVICE_MASK REG_GENMASK(18, 16) /* ADL-P+ */
+#define DBUF_MIN_TRACKER_STATE_SERVICE(x) REG_FIELD_PREP(DBUF_MIN_TRACKER_STATE_SERVICE_MASK, x) /* ADL-P+ */
#define GEN7_MSG_CTL _MMIO(0x45010)
#define WAIT_FOR_PCH_RESET_ACK (1 << 1)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index e9a8fb1773f3..7fae920fa6ae 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4269,7 +4269,6 @@ skl_cursor_allocation(const struct intel_crtc_state *crtc_state,
static void skl_ddb_entry_init_from_hw(struct drm_i915_private *dev_priv,
struct skl_ddb_entry *entry, u32 reg)
{
-
entry->start = reg & DDB_ENTRY_MASK;
entry->end = (reg >> DDB_ENTRY_END_SHIFT) & DDB_ENTRY_MASK;
@@ -4394,6 +4393,7 @@ skl_plane_downscale_amount(const struct intel_crtc_state *crtc_state,
struct dbuf_slice_conf_entry {
u8 active_pipes;
u8 dbuf_mask[I915_MAX_PIPES];
+ bool join_mbus;
};
/*
@@ -4586,14 +4586,16 @@ static const struct dbuf_slice_conf_entry adlp_allowed_dbufs[] = {
{
.active_pipes = BIT(PIPE_A),
.dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2) | BIT(DBUF_S3) | BIT(DBUF_S4),
},
+ .join_mbus = true,
},
{
.active_pipes = BIT(PIPE_B),
.dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2) | BIT(DBUF_S3) | BIT(DBUF_S4),
},
+ .join_mbus = true,
},
{
.active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
@@ -4694,6 +4696,23 @@ static const struct dbuf_slice_conf_entry adlp_allowed_dbufs[] = {
};
+static bool check_mbus_joined(u8 active_pipes,
+ const struct dbuf_slice_conf_entry *dbuf_slices)
+{
+ int i;
+
+ for (i = 0; i < dbuf_slices[i].active_pipes; i++) {
+ if (dbuf_slices[i].active_pipes == active_pipes)
+ return dbuf_slices[i].join_mbus;
+ }
+ return false;
+}
+
+static bool adlp_check_mbus_joined(u8 active_pipes)
+{
+ return check_mbus_joined(active_pipes, adlp_allowed_dbufs);
+}
+
static u8 compute_dbuf_slices(enum pipe pipe, u8 active_pipes,
const struct dbuf_slice_conf_entry *dbuf_slices)
{
@@ -5967,16 +5986,29 @@ skl_compute_ddb(struct intel_atomic_state *state)
new_dbuf_state->enabled_slices = intel_dbuf_enabled_slices(new_dbuf_state);
- if (old_dbuf_state->enabled_slices != new_dbuf_state->enabled_slices) {
+ if (IS_ALDERLAKE_P(dev_priv))
+ new_dbuf_state->joined_mbus = adlp_check_mbus_joined(new_dbuf_state->active_pipes);
+
+ if (old_dbuf_state->enabled_slices != new_dbuf_state->enabled_slices ||
+ old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) {
ret = intel_atomic_serialize_global_state(&new_dbuf_state->base);
if (ret)
return ret;
+ if (old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) {
+ /* TODO: Implement vblank synchronized MBUS joining changes */
+ ret = intel_modeset_all_pipes(state);
+ if (ret)
+ return ret;
+ }
+
drm_dbg_kms(&dev_priv->drm,
- "Enabled dbuf slices 0x%x -> 0x%x (out of %d dbuf slices)\n",
+ "Enabled dbuf slices 0x%x -> 0x%x (out of %d dbuf slices), mbus joined? %s->%s\n",
old_dbuf_state->enabled_slices,
new_dbuf_state->enabled_slices,
- INTEL_INFO(dev_priv)->num_supported_dbuf_slices);
+ INTEL_INFO(dev_priv)->num_supported_dbuf_slices,
+ yesno(old_dbuf_state->joined_mbus),
+ yesno(new_dbuf_state->joined_mbus));
}
for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
@@ -6429,6 +6461,9 @@ void skl_wm_get_hw_state(struct drm_i915_private *dev_priv)
to_intel_dbuf_state(dev_priv->dbuf.obj.state);
struct intel_crtc *crtc;
+ if (IS_ALDERLAKE_P(dev_priv))
+ dbuf_state->joined_mbus = intel_de_read(dev_priv, MBUS_CTL) & MBUS_JOIN;
+
for_each_intel_crtc(&dev_priv->drm, crtc) {
struct intel_crtc_state *crtc_state =
to_intel_crtc_state(crtc->base.state);
@@ -6468,10 +6503,11 @@ void skl_wm_get_hw_state(struct drm_i915_private *dev_priv)
crtc_state->wm.skl.ddb.end = mbus_offset + dbuf_state->ddb[pipe].end;
drm_dbg_kms(&dev_priv->drm,
- "[CRTC:%d:%s] dbuf slices 0x%x, ddb (%d - %d), active pipes 0x%x\n",
+ "[CRTC:%d:%s] dbuf slices 0x%x, ddb (%d - %d), active pipes 0x%x, mbus joined: %s\n",
crtc->base.base.id, crtc->base.name,
dbuf_state->slices[pipe], dbuf_state->ddb[pipe].start,
- dbuf_state->ddb[pipe].end, dbuf_state->active_pipes);
+ dbuf_state->ddb[pipe].end, dbuf_state->active_pipes,
+ yesno(dbuf_state->joined_mbus));
}
dbuf_state->enabled_slices = dev_priv->dbuf.enabled_slices;
@@ -7976,6 +8012,46 @@ int intel_dbuf_init(struct drm_i915_private *dev_priv)
return 0;
}
+/*
+ * Configure MBUS_CTL and all DBUF_CTL_S of each slice to join_mbus state before
+ * update the request state of all DBUS slices.
+ */
+static void update_mbus_pre_enable(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *dev_priv = to_i915(state->base.dev);
+ const int num_slices = INTEL_INFO(dev_priv)->num_supported_dbuf_slices;
+ u32 mbus_ctl, dbuf_min_tracker_val;
+ enum dbuf_slice slice;
+ const struct intel_dbuf_state *dbuf_state =
+ intel_atomic_get_new_dbuf_state(state);
+
+ if (!IS_ALDERLAKE_P(dev_priv))
+ return;
+
+ /*
+ * TODO: Implement vblank synchronized MBUS joining changes.
+ * Must be properly coordinated with dbuf reprogramming.
+ */
+ if (dbuf_state->joined_mbus) {
+ mbus_ctl = MBUS_HASHING_MODE_1x4 | MBUS_JOIN |
+ MBUS_JOIN_PIPE_SELECT_NONE;
+ dbuf_min_tracker_val = DBUF_MIN_TRACKER_STATE_SERVICE(3);
+ } else {
+ mbus_ctl = MBUS_HASHING_MODE_2x2 |
+ MBUS_JOIN_PIPE_SELECT_NONE;
+ dbuf_min_tracker_val = DBUF_MIN_TRACKER_STATE_SERVICE(1);
+ }
+
+ intel_de_rmw(dev_priv, MBUS_CTL,
+ MBUS_HASHING_MODE_MASK | MBUS_JOIN |
+ MBUS_JOIN_PIPE_SELECT_MASK, mbus_ctl);
+
+ for (slice = DBUF_S1; slice < (num_slices + DBUF_S1); slice++)
+ intel_de_rmw(dev_priv, DBUF_CTL_S(slice),
+ DBUF_MIN_TRACKER_STATE_SERVICE_MASK,
+ dbuf_min_tracker_val);
+}
+
void intel_dbuf_pre_plane_update(struct intel_atomic_state *state)
{
struct drm_i915_private *dev_priv = to_i915(state->base.dev);
@@ -7990,6 +8066,7 @@ void intel_dbuf_pre_plane_update(struct intel_atomic_state *state)
WARN_ON(!new_dbuf_state->base.changed);
+ update_mbus_pre_enable(state);
gen9_dbuf_slices_update(dev_priv,
old_dbuf_state->enabled_slices |
new_dbuf_state->enabled_slices);
diff --git a/drivers/gpu/drm/i915/intel_pm.h b/drivers/gpu/drm/i915/intel_pm.h
index 669c8d505677..bac72c859a84 100644
--- a/drivers/gpu/drm/i915/intel_pm.h
+++ b/drivers/gpu/drm/i915/intel_pm.h
@@ -78,9 +78,9 @@ struct intel_dbuf_state {
struct skl_ddb_entry ddb[I915_MAX_PIPES];
unsigned int weight[I915_MAX_PIPES];
u8 slices[I915_MAX_PIPES];
-
u8 enabled_slices;
u8 active_pipes;
+ bool joined_mbus;
};
int intel_dbuf_init(struct drm_i915_private *dev_priv);
--
2.25.4
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