Re: [Intel-gfx] [PATCH v28 2/6] drm/i915: Extract skl SAGV checking

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Thu, May 07, 2020 at 05:44:59PM +0300, Stanislav Lisovskiy wrote:
> Introduce platform dependent SAGV checking in
> combination with bandwidth state pipe SAGV mask.
> 
> This is preparation to adding TGL support, which
> requires different way of SAGV checking.
> 
> v2, v3, v4, v5, v6: Fix rebase conflict
> 
> v7: - Nuke icl specific function, use skl
>       for icl as well, gen specific active_pipes
>       check to be added in the next patch(Ville)
> 
> Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 8a86298962dc..3dc1ad66beb3 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3804,7 +3804,7 @@ void intel_sagv_post_plane_update(struct intel_atomic_state *state)
>  		intel_enable_sagv(dev_priv);
>  }
>  
> -static bool intel_crtc_can_enable_sagv(const struct intel_crtc_state *crtc_state)
> +static bool skl_crtc_can_enable_sagv(const struct intel_crtc_state *crtc_state)
>  {
>  	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
>  	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> @@ -3865,7 +3865,7 @@ static int intel_compute_sagv_mask(struct intel_atomic_state *state)
>  {
>  	int ret;
>  	struct intel_crtc *crtc;
> -	struct intel_crtc_state *new_crtc_state;
> +	const struct intel_crtc_state *new_crtc_state;
>  	struct intel_bw_state *new_bw_state = NULL;
>  	const struct intel_bw_state *old_bw_state = NULL;
>  	int i;
> @@ -3878,7 +3878,7 @@ static int intel_compute_sagv_mask(struct intel_atomic_state *state)
>  
>  		old_bw_state = intel_atomic_get_old_bw_state(state);
>  
> -		if (intel_crtc_can_enable_sagv(new_crtc_state))
> +		if (skl_crtc_can_enable_sagv(new_crtc_state))

I'd leave this behing as a trivial wrapper 
intel_crtc_can_enable_sagv()
{
	return skl_crtc_cna_enable_sagv();
}

so we won't need that ugly 'can_sagv' boolean when introducing the tgl
counterpart. Otherwise lgtm.

>  			new_bw_state->pipe_sagv_reject &= ~BIT(crtc->pipe);
>  		else
>  			new_bw_state->pipe_sagv_reject |= BIT(crtc->pipe);
> @@ -3889,6 +3889,7 @@ static int intel_compute_sagv_mask(struct intel_atomic_state *state)
>  
>  	new_bw_state->active_pipes =
>  		intel_calc_active_pipes(state, old_bw_state->active_pipes);
> +
>  	if (new_bw_state->active_pipes != old_bw_state->active_pipes) {
>  		ret = intel_atomic_lock_global_state(&new_bw_state->base);
>  		if (ret)
> -- 
> 2.24.1.485.gad05a3d8e5

-- 
Ville Syrjälä
Intel
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