Re: [PATCH 06/14] drm/i915: Replace big nested if block with early return

[Jani Nikula <jani.nikula@linux.intel.com>]

On Mon, 18 Aug 2014, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> Looks nicer.

Side note, I kind of like adding "No functional changes." in the commit
messages of patches that do not intend to do functional changes. I find
it helpful.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>


>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dp.c | 40 ++++++++++++++++++++--------------------
>  1 file changed, 20 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 19a818f..e6b4d4d 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1232,38 +1232,38 @@ static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
>  {
>  	struct drm_device *dev = intel_dp_to_dev(intel_dp);
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> +	struct intel_digital_port *intel_dig_port =
> +		dp_to_dig_port(intel_dp);
> +	struct intel_encoder *intel_encoder = &intel_dig_port->base;
> +	enum intel_display_power_domain power_domain;
>  	u32 pp;
>  	u32 pp_stat_reg, pp_ctrl_reg;
>  
>  	WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
>  
> -	if (!intel_dp->want_panel_vdd && edp_have_panel_vdd(intel_dp)) {
> -		struct intel_digital_port *intel_dig_port =
> -						dp_to_dig_port(intel_dp);
> -		struct intel_encoder *intel_encoder = &intel_dig_port->base;
> -		enum intel_display_power_domain power_domain;
> +	if (intel_dp->want_panel_vdd || !edp_have_panel_vdd(intel_dp))
> +		return;
>  
> -		DRM_DEBUG_KMS("Turning eDP VDD off\n");
> +	DRM_DEBUG_KMS("Turning eDP VDD off\n");
>  
> -		pp = ironlake_get_pp_control(intel_dp);
> -		pp &= ~EDP_FORCE_VDD;
> +	pp = ironlake_get_pp_control(intel_dp);
> +	pp &= ~EDP_FORCE_VDD;
>  
> -		pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> -		pp_stat_reg = _pp_stat_reg(intel_dp);
> +	pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> +	pp_stat_reg = _pp_stat_reg(intel_dp);
>  
> -		I915_WRITE(pp_ctrl_reg, pp);
> -		POSTING_READ(pp_ctrl_reg);
> +	I915_WRITE(pp_ctrl_reg, pp);
> +	POSTING_READ(pp_ctrl_reg);
>  
> -		/* Make sure sequencer is idle before allowing subsequent activity */
> -		DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
> -		I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
> +	/* Make sure sequencer is idle before allowing subsequent activity */
> +	DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
> +	I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
>  
> -		if ((pp & POWER_TARGET_ON) == 0)
> -			intel_dp->last_power_cycle = jiffies;
> +	if ((pp & POWER_TARGET_ON) == 0)
> +		intel_dp->last_power_cycle = jiffies;
>  
> -		power_domain = intel_display_port_power_domain(intel_encoder);
> -		intel_display_power_put(dev_priv, power_domain);
> -	}
> +	power_domain = intel_display_port_power_domain(intel_encoder);
> +	intel_display_power_put(dev_priv, power_domain);
>  }
>  
>  static void edp_panel_vdd_work(struct work_struct *__work)
> -- 
> 1.8.5.5
>
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-- 
Jani Nikula, Intel Open Source Technology Center
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