Re: [PATCH 3/8] drm/i915: Update TRANS_SET_CONTEXT_LATENCY during LRR updates

[Jani Nikula <jani.nikula@linux.intel.com>]

On Thu, 16 Jan 2025, Ville Syrjala <ville.syrjala@linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> Update TRANS_SET_CONTEXT_LATENCY in intel_set_transcoder_timings_lrr()
> as well. While for actual LRR updates this should not change, I want
> to reuse this code to also sanitize the vblank delay during boot,
> and in that case we do need to update this.
>
> Cc: Paz Zcharya <pazz@chromium.org>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

Reviewed-by: Jani Nikula <jani.nikula@intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_display.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 1260e394afc7..ac6fc177099f 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -2930,6 +2930,10 @@ static void intel_set_transcoder_timings_lrr(const struct intel_crtc_state *crtc
>  	}
>  
>  	if (DISPLAY_VER(dev_priv) >= 13) {
> +		intel_de_write(dev_priv,
> +			       TRANS_SET_CONTEXT_LATENCY(dev_priv, cpu_transcoder),
> +			       crtc_vblank_start - crtc_vdisplay);
> +
>  		/*
>  		 * VBLANK_START not used by hw, just clear it
>  		 * to make it stand out in register dumps.

-- 
Jani Nikula, Intel