[Intel-gfx] [PATCH] drm/i915: remove unused i915->active_pipes

[Ville Syrjälä]

On Thu, Aug 26, 2021 at 05:18:30PM +0300, Jani Nikula wrote:
> Apparently the last reader of i915->active_pipes was removed with commit
> ef79d62b5ce5 ("drm/i915: Encapsulate dbuf state handling harder"), and
> now it's only ever written to. Remove it completely.
> 
> Cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_display.c | 4 +---
>  drivers/gpu/drm/i915/i915_drv.h              | 6 ------
>  2 files changed, 1 insertion(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index fe5ad599c218..a692971b0209 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -3781,7 +3781,6 @@ static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
>  
>  	intel_display_power_put_all_in_set(dev_priv, &crtc->enabled_power_domains);
>  
> -	dev_priv->active_pipes &= ~BIT(pipe);
>  	cdclk_state->min_cdclk[pipe] = 0;
>  	cdclk_state->min_voltage_level[pipe] = 0;
>  	cdclk_state->active_pipes &= ~BIT(pipe);
> @@ -12351,8 +12350,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
>  			    enableddisabled(crtc_state->hw.active));
>  	}
>  
> -	dev_priv->active_pipes = cdclk_state->active_pipes =
> -		dbuf_state->active_pipes = active_pipes;
> +	cdclk_state->active_pipes = dbuf_state->active_pipes = active_pipes;
>  
>  	readout_plane_state(dev_priv);
>  
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index f64ba566fe8c..033031169d74 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1015,12 +1015,6 @@ struct drm_i915_private {
>  
>  	struct list_head global_obj_list;
>  
> -	/*
> -	 * For reading active_pipes holding any crtc lock is
> -	 * sufficient, for writing must hold all of them.
> -	 */
> -	u8 active_pipes;
> -
>  	struct i915_wa_list gt_wa_list;
>  
>  	struct i915_frontbuffer_tracking fb_tracking;
> -- 
> 2.20.1

-- 
Ville Syrjälä
Intel