[Intel-gfx] [PATCH 1/8] drm/i915: Nuke the useless changed param from skl_ddb_add_affected_pipes()

[Lisovskiy, Stanislav]

On Fri, 2019-10-11 at 23:09 +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> changed==true just means we have some crtcs in the state. All the
> stuff following this only operates on crtcs in the state anyway so
> there is no point in having this bool.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>

> ---
>  drivers/gpu/drm/i915/intel_pm.c | 30 ++++--------------------------
>  1 file changed, 4 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c
> b/drivers/gpu/drm/i915/intel_pm.c
> index b306e2338f5a..49568270a89d 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -5424,35 +5424,14 @@ skl_print_wm_changes(struct
> intel_atomic_state *state)
>  }
>  
>  static int
> -skl_ddb_add_affected_pipes(struct intel_atomic_state *state, bool
> *changed)
> +skl_ddb_add_affected_pipes(struct intel_atomic_state *state)
>  {
>  	struct drm_device *dev = state->base.dev;
>  	const struct drm_i915_private *dev_priv = to_i915(dev);
>  	struct intel_crtc *crtc;
>  	struct intel_crtc_state *crtc_state;
>  	u32 realloc_pipes = pipes_modified(state);
> -	int ret, i;
> -
> -	/*
> -	 * When we distrust bios wm we always need to recompute to set
> the
> -	 * expected DDB allocations for each CRTC.
> -	 */
> -	if (dev_priv->wm.distrust_bios_wm)
> -		(*changed) = true;
> -
> -	/*
> -	 * If this transaction isn't actually touching any CRTC's,
> don't
> -	 * bother with watermark calculation.  Note that if we pass
> this
> -	 * test, we're guaranteed to hold at least one CRTC state
> mutex,
> -	 * which means we can safely use values like dev_priv-
> >active_pipes
> -	 * since any racing commits that want to update them would need
> to
> -	 * hold _all_ CRTC state mutexes.
> -	 */
> -	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i)
> -		(*changed) = true;
> -
> -	if (!*changed)
> -		return 0;
> +	int ret;
>  
>  	/*
>  	 * If this is our first atomic update following hardware
> readout,
> @@ -5576,14 +5555,13 @@ skl_compute_wm(struct intel_atomic_state
> *state)
>  	struct intel_crtc_state *new_crtc_state;
>  	struct intel_crtc_state *old_crtc_state;
>  	struct skl_ddb_values *results = &state->wm_results;
> -	bool changed = false;
>  	int ret, i;
>  
>  	/* Clear all dirty flags */
>  	results->dirty_pipes = 0;
>  
> -	ret = skl_ddb_add_affected_pipes(state, &changed);
> -	if (ret || !changed)
> +	ret = skl_ddb_add_affected_pipes(state);
> +	if (ret)
>  		return ret;
>  
>  	/*