[Intel-gfx] [PATCH v3 3/3] drm/i915/display/adlp: Fix programing of PIPE_MBUS_DBOX_CTL
José Roberto de Souza
jose.souza at intel.com
Mon Mar 28 19:16:17 UTC 2022
PIPE_MBUS_DBOX_CTL was only being programmed when a pipe is being
enabled but that could potentially cause issues as it could have
mismatching values while pipes are being enabled.
So here moving the PIPE_MBUS_DBOX_CTL programming of all pipes to be
executed before the function that enables all pipes, leaving all pipes
with a matching A_CREDIT value.
While at it, also moving it to intel_pm.c as we are trying to reduce
the gigantic size of it and intel_pm.c have other MBUS programing
sequences.
v2:
- do not program PIPE_MBUS_DBOX_CTL if pipe will not be active or
when it do not needs modeset
- remove the checks to wait a vblank
v3:
- checking if dbuf state is present in state before using it
BSpec: 49213
BSpec: 50343
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 37 +-------------
drivers/gpu/drm/i915/intel_pm.c | 51 ++++++++++++++++++++
drivers/gpu/drm/i915/intel_pm.h | 1 +
3 files changed, 53 insertions(+), 36 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 078ada041e1cd..4e8afd94e58d0 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1824,35 +1824,6 @@ static void glk_pipe_scaler_clock_gating_wa(struct drm_i915_private *dev_priv,
intel_de_write(dev_priv, CLKGATE_DIS_PSL(pipe), val);
}
-static void icl_pipe_mbus_enable(struct intel_crtc *crtc, bool joined_mbus)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- enum pipe pipe = crtc->pipe;
- u32 val;
-
- val = intel_de_read(dev_priv, PIPE_MBUS_DBOX_CTL(pipe));
- val &= ~MBUS_DBOX_A_CREDIT_MASK;
- /* Wa_22010947358:adl-p */
- if (IS_ALDERLAKE_P(dev_priv))
- val |= joined_mbus ? MBUS_DBOX_A_CREDIT(6) : MBUS_DBOX_A_CREDIT(4);
- else
- val |= MBUS_DBOX_A_CREDIT(2);
-
- val &= ~(MBUS_DBOX_BW_CREDIT_MASK | MBUS_DBOX_B_CREDIT_MASK);
- if (IS_ALDERLAKE_P(dev_priv)) {
- val |= MBUS_DBOX_BW_CREDIT(2);
- val |= MBUS_DBOX_B_CREDIT(8);
- } else if (DISPLAY_VER(dev_priv) >= 12) {
- val |= MBUS_DBOX_BW_CREDIT(2);
- val |= MBUS_DBOX_B_CREDIT(12);
- } else {
- val |= MBUS_DBOX_BW_CREDIT(1);
- val |= MBUS_DBOX_B_CREDIT(8);
- }
-
- intel_de_write(dev_priv, PIPE_MBUS_DBOX_CTL(pipe), val);
-}
-
static void hsw_set_linetime_wm(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@@ -1988,13 +1959,6 @@ static void hsw_crtc_enable(struct intel_atomic_state *state,
intel_initial_watermarks(state, crtc);
- if (DISPLAY_VER(dev_priv) >= 11) {
- const struct intel_dbuf_state *dbuf_state =
- intel_atomic_get_new_dbuf_state(state);
-
- icl_pipe_mbus_enable(crtc, dbuf_state->joined_mbus);
- }
-
if (intel_crtc_is_bigjoiner_slave(new_crtc_state))
intel_crtc_vblank_on(new_crtc_state);
@@ -8586,6 +8550,7 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
intel_encoders_update_prepare(state);
intel_dbuf_pre_plane_update(state);
+ intel_mbus_dbox_update(state);
for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
if (new_crtc_state->do_async_flip)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index e60c02d760ffa..8881944c80c5b 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -8258,3 +8258,54 @@ void intel_dbuf_post_plane_update(struct intel_atomic_state *state)
gen9_dbuf_slices_update(dev_priv,
new_dbuf_state->enabled_slices);
}
+
+void intel_mbus_dbox_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ struct intel_dbuf_state *new_dbuf_state, *old_dbuf_state;
+ struct intel_crtc_state *new_crtc_state;
+ struct intel_crtc *crtc;
+ int i;
+
+ if (DISPLAY_VER(i915) < 11 || !state->modeset)
+ return;
+
+ new_dbuf_state = intel_atomic_get_dbuf_state(state);
+ old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
+ if (!new_dbuf_state || !old_dbuf_state ||
+ (new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus &&
+ new_dbuf_state->active_pipes == old_dbuf_state->active_pipes))
+ return;
+
+ for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
+ u32 val;
+
+ if (!new_crtc_state->hw.active ||
+ !intel_crtc_needs_modeset(new_crtc_state))
+ continue;
+
+ val = intel_de_read(i915, PIPE_MBUS_DBOX_CTL(crtc->pipe));
+ val &= ~MBUS_DBOX_A_CREDIT_MASK;
+ /* Wa_22010947358:adl-p */
+ if (IS_ALDERLAKE_P(i915))
+ val |= new_dbuf_state->joined_mbus ? MBUS_DBOX_A_CREDIT(6) :
+ MBUS_DBOX_A_CREDIT(4);
+ else
+ val |= MBUS_DBOX_A_CREDIT(2);
+
+ if (IS_ALDERLAKE_P(i915)) {
+ val |= MBUS_DBOX_BW_CREDIT(2);
+ val |= MBUS_DBOX_B_CREDIT(8);
+ } else if (DISPLAY_VER(i915) >= 12) {
+ val &= ~(MBUS_DBOX_BW_CREDIT_MASK | MBUS_DBOX_B_CREDIT_MASK);
+ val |= MBUS_DBOX_BW_CREDIT(2);
+ val |= MBUS_DBOX_B_CREDIT(12);
+ } else {
+ val &= ~(MBUS_DBOX_BW_CREDIT_MASK | MBUS_DBOX_B_CREDIT_MASK);
+ val |= MBUS_DBOX_BW_CREDIT(1);
+ val |= MBUS_DBOX_B_CREDIT(8);
+ }
+
+ intel_de_write(i915, PIPE_MBUS_DBOX_CTL(crtc->pipe), val);
+ }
+}
diff --git a/drivers/gpu/drm/i915/intel_pm.h b/drivers/gpu/drm/i915/intel_pm.h
index 51705151b842f..50604cf7398c4 100644
--- a/drivers/gpu/drm/i915/intel_pm.h
+++ b/drivers/gpu/drm/i915/intel_pm.h
@@ -94,5 +94,6 @@ intel_atomic_get_dbuf_state(struct intel_atomic_state *state);
int intel_dbuf_init(struct drm_i915_private *dev_priv);
void intel_dbuf_pre_plane_update(struct intel_atomic_state *state);
void intel_dbuf_post_plane_update(struct intel_atomic_state *state);
+void intel_mbus_dbox_update(struct intel_atomic_state *state);
#endif /* __INTEL_PM_H__ */
--
2.35.1
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