Re: [PATCH 11/19] drm/i915: Split current joiner hw state readout

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

On Wed, Sep 11, 2024 at 06:43:41PM +0530, Ankit Nautiyal wrote:
> From: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
> 
> We need to add a new sanity checks and also do
> some preparations for adding ultrajoiner hw state readout.
> Lets first split reading of the uncompressed joiner and bigjoiner
> bit masks into separate functions.
> 
> v2: Fixed checkpatch warnings (Ankit)
> v3: Use struct intel_display in the new functions. (Ankit)
> 
> Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_display.c | 75 ++++++++++++++------
>  1 file changed, 55 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 248ad63b0ba8..e93af02aa859 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -3582,27 +3582,54 @@ static bool intel_display_can_use_joiner(struct intel_display *display)
>  	return (DISPLAY_VER(display) >= 11);
>  }
>  
> -static void enabled_joiner_pipes(struct drm_i915_private *dev_priv,
> -				 u8 *primary_pipes, u8 *secondary_pipes)
> +static void enabled_uncompressed_joiner_pipes(struct intel_display *display,
> +					      u8 *primary_pipes, u8 *secondary_pipes)
>  {
> -	struct intel_display *display = to_intel_display(&dev_priv->drm);
> +	struct drm_i915_private *i915 = to_i915(display->drm);
>  	struct intel_crtc *crtc;
>  
>  	*primary_pipes = 0;
>  	*secondary_pipes = 0;
>  
> -	if (!intel_display_can_use_joiner(display))
> +	if (DISPLAY_VER(display) < 13)
>  		return;
>  
> -	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc,
> -					 joiner_pipes(dev_priv)) {
> +	for_each_intel_crtc_in_pipe_mask(&i915->drm, crtc,
> +					 joiner_pipes(i915)) {
>  		enum intel_display_power_domain power_domain;
>  		enum pipe pipe = crtc->pipe;
>  		intel_wakeref_t wakeref;
>  
> -		power_domain = intel_dsc_power_domain(crtc, (enum transcoder) pipe);
> -		with_intel_display_power_if_enabled(dev_priv, power_domain, wakeref) {
> -			u32 tmp = intel_de_read(dev_priv, ICL_PIPE_DSS_CTL1(pipe));
> +		power_domain = POWER_DOMAIN_PIPE(pipe);
> +		with_intel_display_power_if_enabled(i915, power_domain, wakeref) {
> +			u32 tmp = intel_de_read(display, ICL_PIPE_DSS_CTL1(pipe));
> +
> +			if (tmp & UNCOMPRESSED_JOINER_PRIMARY)
> +				*primary_pipes |= BIT(pipe);
> +			if (tmp & UNCOMPRESSED_JOINER_SECONDARY)
> +				*secondary_pipes |= BIT(pipe);
> +		}
> +	}
> +}
> +
> +static void enabled_bigjoiner_pipes(struct intel_display *display,
> +				    u8 *primary_pipes, u8 *secondary_pipes)
> +{
> +	struct drm_i915_private *i915 = to_i915(display->drm);
> +	struct intel_crtc *crtc;
> +
> +	*primary_pipes = 0;
> +	*secondary_pipes = 0;
> +
> +	for_each_intel_crtc_in_pipe_mask(&i915->drm, crtc,
> +					 joiner_pipes(i915)) {
> +		enum intel_display_power_domain power_domain;
> +		enum pipe pipe = crtc->pipe;
> +		intel_wakeref_t wakeref;
> +
> +		power_domain = intel_dsc_power_domain(crtc, (enum transcoder)pipe);
> +		with_intel_display_power_if_enabled(i915, power_domain, wakeref) {
> +			u32 tmp = intel_de_read(display, ICL_PIPE_DSS_CTL1(pipe));
>  
>  			if (!(tmp & BIG_JOINER_ENABLE))
>  				continue;
> @@ -3612,20 +3639,28 @@ static void enabled_joiner_pipes(struct drm_i915_private *dev_priv,
>  			else
>  				*secondary_pipes |= BIT(pipe);
>  		}
> +	}
> +}
>  
> -		if (DISPLAY_VER(dev_priv) < 13)
> -			continue;
> +static void enabled_joiner_pipes(struct drm_i915_private *dev_priv,
> +				 u8 *primary_pipes, u8 *secondary_pipes)
> +{
> +	struct intel_display *display = to_intel_display(&dev_priv->drm);
> +	u8 primary_uncompressed_joiner_pipes, primary_bigjoiner_pipes;
> +	u8 secondary_uncompressed_joiner_pipes, secondary_bigjoiner_pipes;
>  
> -		power_domain = POWER_DOMAIN_PIPE(pipe);
> -		with_intel_display_power_if_enabled(dev_priv, power_domain, wakeref) {
> -			u32 tmp = intel_de_read(dev_priv, ICL_PIPE_DSS_CTL1(pipe));
> +	if (!intel_display_can_use_joiner(display))
> +		return;

I think we should just have the check in enabled_bigjoiner_pipes()
and this function shouldn't really have to care whether joiners
are supported or not (or which types are supported).

>  
> -			if (tmp & UNCOMPRESSED_JOINER_PRIMARY)
> -				*primary_pipes |= BIT(pipe);
> -			if (tmp & UNCOMPRESSED_JOINER_SECONDARY)
> -				*secondary_pipes |= BIT(pipe);
> -		}
> -	}
> +	enabled_uncompressed_joiner_pipes(display, &primary_uncompressed_joiner_pipes,
> +					  &secondary_uncompressed_joiner_pipes);
> +
> +	enabled_bigjoiner_pipes(display, &primary_bigjoiner_pipes,
> +				&secondary_bigjoiner_pipes);
> +
> +	*primary_pipes = primary_uncompressed_joiner_pipes | primary_bigjoiner_pipes;
> +
> +	*secondary_pipes = secondary_uncompressed_joiner_pipes | secondary_bigjoiner_pipes;
>  
>  	/* Joiner pipes should always be consecutive primary and secondary */
>  	drm_WARN(&dev_priv->drm, *secondary_pipes != *primary_pipes << 1,
> -- 
> 2.45.2

-- 
Ville Syrjälä
Intel