On Wed, 2024-02-07 at 20:05 +0530, 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.
Do you have Bspec number. You could add it here.
>
> Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
> ---
> 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
Do you have HSD number to add here?
BR,
Jouni Högander
> + * 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
