On Wed, Jan 13, 2021 at 02:09:21PM -0800, Manasi Navare wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> We want to calculate the vblank_start for vblank evasion
> differently for vrr. To make that nicer lets first extract
> the current non-vrr case to a helper.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Manasi
> ---
> drivers/gpu/drm/i915/display/intel_sprite.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
> index cf3589fd0ddb..ced6af7cdc84 100644
> --- a/drivers/gpu/drm/i915/display/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/display/intel_sprite.c
> @@ -62,6 +62,16 @@ int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,
> 1000 * adjusted_mode->crtc_htotal);
> }
>
> +static int intel_mode_vblank_start(const struct drm_display_mode *mode)
> +{
> + int vblank_start = mode->crtc_vblank_start;
> +
> + if (mode->flags & DRM_MODE_FLAG_INTERLACE)
> + vblank_start = DIV_ROUND_UP(vblank_start, 2);
> +
> + return vblank_start;
> +}
> +
> /**
> * intel_pipe_update_start() - start update of a set of display registers
> * @new_crtc_state: the new crtc state
> @@ -90,9 +100,7 @@ void intel_pipe_update_start(const struct intel_crtc_state *new_crtc_state)
> if (new_crtc_state->uapi.async_flip)
> return;
>
> - vblank_start = adjusted_mode->crtc_vblank_start;
> - if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
> - vblank_start = DIV_ROUND_UP(vblank_start, 2);
> + vblank_start = intel_mode_vblank_start(adjusted_mode);
>
> /* FIXME needs to be calibrated sensibly */
> min = vblank_start - intel_usecs_to_scanlines(adjusted_mode,
> --
> 2.19.1
>
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