On 7/8/2024 8:52 PM, Animesh Manna wrote:
Panel Replay VSC SDP not getting sent when VRR is enabled
and W1 and W2 are 0. So Program Set Context Latency in
TRANS_SET_CONTEXT_LATENCY register to at least a value of 1.
The same is applicable for PSR1/PSR2 as well.
HSD: 14015406119
v1: Initial version.
v2: Update timings stored in adjusted_mode struct. [Ville]
v3: Add WA in compute_config(). [Ville]
v4:
- Add DISPLAY_VER() check and improve code comment. [Rodrigo]
- Introduce centralized intel_crtc_vblank_delay(). [Ville]
v5: Move to crtc_compute_config(). [Ville]
v6: Restrict DISPLAY_VER till 14. [Mitul]
v7:
- Corrected code-comment. [Mitul]
- dev_priv local variable removed. [Jani]
v8: Introduce late_compute_config() which will take care late
vblank-delay adjustment. [Ville]
v9: Implementation simplified and split into multiple patches.
Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display.c | 50 +++++++++++++++++++-
drivers/gpu/drm/i915/display/intel_display.h | 2 +
drivers/gpu/drm/i915/display/intel_vrr.c | 13 -----
3 files changed, 51 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index c2c388212e2e..be30eb22f3d1 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2512,9 +2512,21 @@ static int intel_crtc_compute_pipe_mode(struct intel_crtc_state *crtc_state)
static int intel_crtc_compute_config(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
+ struct drm_connector *connector;
+ struct drm_connector_state *connector_state;
struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
- int ret;
+ int ret, i;
+
+ for_each_new_connector_in_state(&state->base, connector, connector_state, i) {
+ struct intel_encoder *encoder =
+ to_intel_encoder(connector_state->best_encoder);
+
+ if (connector_state->crtc != &crtc->base)
+ continue;
+
+ intel_crtc_adjust_vblank_delay(crtc_state, encoder);
+ }
ret = intel_dpll_crtc_compute_clock(state, crtc);
if (ret)
@@ -3925,6 +3937,26 @@ bool intel_crtc_get_pipe_config(struct intel_crtc_state *crtc_state)
return true;
}
+void intel_crtc_adjust_vblank_delay(struct intel_crtc_state *crtc_state,
+ struct intel_encoder *encoder)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+
+ /*
+ * wa_14015401596 for display versions 13, 14.
Wondering if we should use the new WA framework for this.
Since it is only for Display 13, and 14, not impacting the XE, I am not
very sure about the applicability.
+ * Program Set Context Latency in TRANS_SET_CONTEXT_LATENCY register
+ * to at least a value of 1 when PSR1/PSR2/Panel Replay is enabled with VRR.
+ * Value for TRANS_SET_CONTEXT_LATENCY is calculated by substracting
+ * crtc_vdisplay from crtc_vblank_start, so incrementing crtc_vblank_start
+ * by 1 if both are equal.
+ */
+ if (crtc_state->vrr.enable && crtc_state->has_psr &&
+ adjusted_mode->crtc_vblank_start == adjusted_mode->crtc_vdisplay &&
+ IS_DISPLAY_VER(to_i915(crtc->base.dev), 13, 14))
Lets use struct intel_display here.
+ adjusted_mode->crtc_vblank_start += 1;
+}
+
int intel_dotclock_calculate(int link_freq,
const struct intel_link_m_n *m_n)
{
@@ -4783,10 +4815,26 @@ intel_modeset_pipe_config_late(struct intel_atomic_state *state,
{
struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
+ struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
struct drm_connector_state *conn_state;
struct drm_connector *connector;
int i;
+ if (crtc_state->vrr.enable) {
+ /*
+ * For XE_LPD+, we use guardband and pipeline override
+ * is deprecated.
+ */
+ if (DISPLAY_VER(to_i915(crtc->base.dev)) >= 13) {
+ crtc_state->vrr.guardband =
+ crtc_state->vrr.vmin + 1 - adjusted_mode->crtc_vblank_start;
+ } else {
+ crtc_state->vrr.pipeline_full =
+ min(255, crtc_state->vrr.vmin - adjusted_mode->crtc_vblank_start -
+ crtc_state->framestart_delay - 1);
+ }
+ }
+
I think we should split this patch in two. One for just moving the
vrr.guardband and vrr.pipeline_full calculation to
intel_modeset_pipe_config_late with the reasoning for the movement,
and another for the actual WA. Overall the change looks good to me.
Regards,
Ankit
for_each_new_connector_in_state(&state->base, connector,
conn_state, i) {
struct intel_encoder *encoder =
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index b0cf6ca70952..21fd330b8834 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -428,6 +428,8 @@ bool intel_crtc_is_joiner_primary(const struct intel_crtc_state *crtc_state);
u8 intel_crtc_joiner_secondary_pipes(const struct intel_crtc_state *crtc_state);
struct intel_crtc *intel_primary_crtc(const struct intel_crtc_state *crtc_state);
bool intel_crtc_get_pipe_config(struct intel_crtc_state *crtc_state);
+void intel_crtc_adjust_vblank_delay(struct intel_crtc_state *crtc_state,
+ struct intel_encoder *encoder);
bool intel_pipe_config_compare(const struct intel_crtc_state *current_config,
const struct intel_crtc_state *pipe_config,
bool fastset);
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 5a0da64c7db3..46341367d250 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -242,19 +242,6 @@ intel_vrr_compute_config(struct intel_crtc_state *crtc_state,
(crtc_state->hw.adjusted_mode.crtc_vtotal -
crtc_state->hw.adjusted_mode.vsync_end);
}
-
- /*
- * For XE_LPD+, we use guardband and pipeline override
- * is deprecated.
- */
- if (DISPLAY_VER(i915) >= 13) {
- crtc_state->vrr.guardband =
- crtc_state->vrr.vmin + 1 - adjusted_mode->crtc_vblank_start;
- } else {
- crtc_state->vrr.pipeline_full =
- min(255, crtc_state->vrr.vmin - adjusted_mode->crtc_vblank_start -
- crtc_state->framestart_delay - 1);
- }
}
static u32 trans_vrr_ctl(const struct intel_crtc_state *crtc_state)
