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.
Signed-off-by: Animesh Manna <[email protected]> --- drivers/gpu/drm/i915/display/intel_display.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 1b844cac4c58..c1ec78b5b6c5 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -2618,8 +2618,16 @@ static void intel_set_transcoder_timings(const struct intel_crtc_state *crtc_sta * TRANS_SET_CONTEXT_LATENCY to configure the pipe vblank start. */ if (DISPLAY_VER(dev_priv) >= 13) { - intel_de_write(dev_priv, TRANS_SET_CONTEXT_LATENCY(cpu_transcoder), - crtc_vblank_start - crtc_vdisplay); + /* + * WA: Program Set Context Latency in TRANS_SET_CONTEXT_LATENCY register + * to at least a value of 1 when Panel Replay is enabled with VRR. + */ + if (crtc_state->vrr.enable && crtc_state->has_panel_replay && + (crtc_vblank_start == crtc_vdisplay)) + intel_de_write(dev_priv, TRANS_SET_CONTEXT_LATENCY(cpu_transcoder), 1); + else + intel_de_write(dev_priv, TRANS_SET_CONTEXT_LATENCY(cpu_transcoder), + crtc_vblank_start - crtc_vdisplay); /* * VBLANK_START not used by hw, just clear it -- 2.29.0
