[PATCH 1/9] drm/i915: Decouple intel_crtc_vblank_evade_scanlines() from atomic commits

[Shankar, Uma]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Ville
> Syrjala
> Sent: Wednesday, December 13, 2023 3:55 PM
> To: intel-gfx at lists.freedesktop.org
> Subject: [PATCH 1/9] drm/i915: Decouple intel_crtc_vblank_evade_scanlines()
> from atomic commits
> 
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> We'll be needing to do vblank evasion around legacy cursor updates, which don't
> have the intel_atomic_state around. So let's remove this dependency on a full
> commit and pass the crtc state in by hand.

Looks Good to me.
Reviewed-by: Uma Shankar <uma.shankar at intel.com>

> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_crtc.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c
> b/drivers/gpu/drm/i915/display/intel_crtc.c
> index 8a84a31c7b48..d5c3f6078e42 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.c
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.c
> @@ -471,14 +471,11 @@ static int intel_mode_vblank_start(const struct
> drm_display_mode *mode)
>  	return vblank_start;
>  }
> 
> -static void intel_crtc_vblank_evade_scanlines(struct intel_atomic_state *state,
> -					      struct intel_crtc *crtc,
> +static void intel_crtc_vblank_evade_scanlines(const struct intel_crtc_state
> *old_crtc_state,
> +					      const struct intel_crtc_state
> *new_crtc_state,
>  					      int *min, int *max, int *vblank_start)
> {
> -	const struct intel_crtc_state *old_crtc_state =
> -		intel_atomic_get_old_crtc_state(state, crtc);
> -	const struct intel_crtc_state *new_crtc_state =
> -		intel_atomic_get_new_crtc_state(state, crtc);
> +	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
>  	const struct intel_crtc_state *crtc_state;
>  	const struct drm_display_mode *adjusted_mode;
> 
> @@ -497,7 +494,7 @@ static void intel_crtc_vblank_evade_scanlines(struct
> intel_atomic_state *state,
> 
>  	if (crtc->mode_flags & I915_MODE_FLAG_VRR) {
>  		/* timing changes should happen with VRR disabled */
> -		drm_WARN_ON(state->base.dev,
> intel_crtc_needs_modeset(new_crtc_state) ||
> +		drm_WARN_ON(crtc->base.dev,
> intel_crtc_needs_modeset(new_crtc_state)
> +||
>  			    new_crtc_state->update_m_n || new_crtc_state-
> >update_lrr);
> 
>  		if (intel_vrr_is_push_sent(crtc_state))
> @@ -542,6 +539,8 @@ void intel_pipe_update_start(struct intel_atomic_state
> *state,
>  			     struct intel_crtc *crtc)
>  {
>  	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> +	const struct intel_crtc_state *old_crtc_state =
> +		intel_atomic_get_old_crtc_state(state, crtc);
>  	struct intel_crtc_state *new_crtc_state =
>  		intel_atomic_get_new_crtc_state(state, crtc);
>  	long timeout = msecs_to_jiffies_timeout(1); @@ -566,7 +565,8 @@ void
> intel_pipe_update_start(struct intel_atomic_state *state,
>  	if (intel_crtc_needs_vblank_work(new_crtc_state))
>  		intel_crtc_vblank_work_init(new_crtc_state);
> 
> -	intel_crtc_vblank_evade_scanlines(state, crtc, &min, &max,
> &vblank_start);
> +	intel_crtc_vblank_evade_scanlines(old_crtc_state, new_crtc_state,
> +					  &min, &max, &vblank_start);
>  	if (min <= 0 || max <= 0)
>  		goto irq_disable;
> 
> --
> 2.41.0