> -Original Message-
> From: Intel-gfx On Behalf Of Ville
> Syrjala
> Sent: Wednesday, June 7, 2023 12:45 AM
> To: intel-gfx@lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH v2 16/19] drm/i915: Introudce
> intel_crtc_scanline_to_hw()
Typo in introduce
With this fixed, this is:
Reviewed-by: Uma Shankar
> From: Ville Syrjälä
>
> Add a helper to convert our idea of a scanline to the hw's idea of the same
> scanline (ie. apply crtc->scanline_offset in reverse).
> We'll need this to tell the DSB do stuff on a specific scanline.
>
> Signed-off-by: Ville Syrjälä
> ---
> drivers/gpu/drm/i915/display/intel_vblank.c | 14 ++
> drivers/gpu/drm/i915/display/intel_vblank.h | 1 +
> 2 files changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_vblank.c
> b/drivers/gpu/drm/i915/display/intel_vblank.c
> index f5659ebd08eb..2cec2abf9746 100644
> --- a/drivers/gpu/drm/i915/display/intel_vblank.c
> +++ b/drivers/gpu/drm/i915/display/intel_vblank.c
> @@ -251,6 +251,20 @@ static int __intel_get_crtc_scanline(struct intel_crtc
> *crtc)
> return (position + crtc->scanline_offset) % vtotal; }
>
> +int intel_crtc_scanline_to_hw(struct intel_crtc *crtc, int scanline) {
> + const struct drm_vblank_crtc *vblank =
> + >base.dev->vblank[drm_crtc_index(>base)];
> + const struct drm_display_mode *mode = >hwmode;
> + int vtotal;
> +
> + vtotal = mode->crtc_vtotal;
> + if (mode->flags & DRM_MODE_FLAG_INTERLACE)
> + vtotal /= 2;
> +
> + return (scanline + vtotal - crtc->scanline_offset) % vtotal; }
> +
> static bool i915_get_crtc_scanoutpos(struct drm_crtc *_crtc,
>bool in_vblank_irq,
>int *vpos, int *hpos,
> diff --git a/drivers/gpu/drm/i915/display/intel_vblank.h
> b/drivers/gpu/drm/i915/display/intel_vblank.h
> index 08e706b29149..17636f140c71 100644
> --- a/drivers/gpu/drm/i915/display/intel_vblank.h
> +++ b/drivers/gpu/drm/i915/display/intel_vblank.h
> @@ -22,5 +22,6 @@ void intel_wait_for_pipe_scanline_stopped(struct intel_crtc
> *crtc); void intel_wait_for_pipe_scanline_moving(struct intel_crtc *crtc);
> void
> intel_crtc_update_active_timings(const struct intel_crtc_state *crtc_state,
> bool vrr_enable);
> +int intel_crtc_scanline_to_hw(struct intel_crtc *crtc, int scanline);
>
> #endif /* __INTEL_VBLANK_H__ */
> --
> 2.39.3
