Re: [Intel-gfx] [PATCH 09/10] drm/i915: Return both master and slave pipes from enabled_bigjoiner_pipes()

["Navare, Manasi" <manasi.d.navare@intel.com>]

On Thu, Feb 03, 2022 at 08:38:22PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Return both the master and slave pipe bitmasks from
> enabled_bigjoiner_pipes(). We'll have use for both during
> readout soon.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

This looks good, can this be just combined with the patch that would use the slave and mastr pipes
in the readout ?

Either way,

Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>

Manasi

> ---
>  drivers/gpu/drm/i915/display/intel_display.c | 25 +++++++++++---------
>  1 file changed, 14 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 6df498fc720a..34b6b4ab3a1b 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -4064,11 +4064,14 @@ static bool transcoder_ddi_func_is_enabled(struct drm_i915_private *dev_priv,
>  	return tmp & TRANS_DDI_FUNC_ENABLE;
>  }
>  
> -static u8 enabled_bigjoiner_pipes(struct drm_i915_private *dev_priv)
> +static void enabled_bigjoiner_pipes(struct drm_i915_private *dev_priv,
> +				    u8 *master_pipes, u8 *slave_pipes)
>  {
> -	u8 master_pipes = 0, slave_pipes = 0;
>  	struct intel_crtc *crtc;
>  
> +	*master_pipes = 0;
> +	*slave_pipes = 0;
> +
>  	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc,
>  					 bigjoiner_pipes(dev_priv)) {
>  		enum intel_display_power_domain power_domain;
> @@ -4083,9 +4086,9 @@ static u8 enabled_bigjoiner_pipes(struct drm_i915_private *dev_priv)
>  				continue;
>  
>  			if (tmp & MASTER_BIG_JOINER_ENABLE)
> -				master_pipes |= BIT(pipe);
> +				*master_pipes |= BIT(pipe);
>  			else
> -				slave_pipes |= BIT(pipe);
> +				*slave_pipes |= BIT(pipe);
>  		}
>  
>  		if (DISPLAY_VER(dev_priv) < 13)
> @@ -4096,18 +4099,16 @@ static u8 enabled_bigjoiner_pipes(struct drm_i915_private *dev_priv)
>  			u32 tmp = intel_de_read(dev_priv, ICL_PIPE_DSS_CTL1(pipe));
>  
>  			if (tmp & UNCOMPRESSED_JOINER_MASTER)
> -				master_pipes |= BIT(pipe);
> +				*master_pipes |= BIT(pipe);
>  			if (tmp & UNCOMPRESSED_JOINER_SLAVE)
> -				slave_pipes |= BIT(pipe);
> +				*slave_pipes |= BIT(pipe);
>  		}
>  	}
>  
>  	/* Bigjoiner pipes should always be consecutive master and slave */
> -	drm_WARN(&dev_priv->drm, slave_pipes != master_pipes << 1,
> +	drm_WARN(&dev_priv->drm, *slave_pipes != *master_pipes << 1,
>  		 "Bigjoiner misconfigured (master pipes 0x%x, slave pipes 0x%x)\n",
> -		 master_pipes, slave_pipes);
> -
> -	return slave_pipes;
> +		 *master_pipes, *slave_pipes);
>  }
>  
>  static u8 hsw_panel_transcoders(struct drm_i915_private *i915)
> @@ -4126,6 +4127,7 @@ static u8 hsw_enabled_transcoders(struct intel_crtc *crtc)
>  	struct drm_i915_private *dev_priv = to_i915(dev);
>  	u8 panel_transcoder_mask = hsw_panel_transcoders(dev_priv);
>  	enum transcoder cpu_transcoder;
> +	u8 master_pipes, slave_pipes;
>  	u8 enabled_transcoders = 0;
>  
>  	/*
> @@ -4177,7 +4179,8 @@ static u8 hsw_enabled_transcoders(struct intel_crtc *crtc)
>  		enabled_transcoders |= BIT(cpu_transcoder);
>  
>  	/* bigjoiner slave -> consider the master pipe's transcoder as well */
> -	if (enabled_bigjoiner_pipes(dev_priv) & BIT(crtc->pipe)) {
> +	enabled_bigjoiner_pipes(dev_priv, &master_pipes, &slave_pipes);
> +	if (slave_pipes & BIT(crtc->pipe)) {
>  		cpu_transcoder = (enum transcoder) crtc->pipe - 1;
>  		if (transcoder_ddi_func_is_enabled(dev_priv, cpu_transcoder))
>  			enabled_transcoders |= BIT(cpu_transcoder);
> -- 
> 2.34.1
>