Date:   Mon, 8 Feb 2021 06:14:30 -0500
From:   Rodrigo Vivi <rodrigo.vivi@...el.com>
To:     Lyude Paul <lyude@...hat.com>
Cc:     dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        open list <linux-kernel@...r.kernel.org>,
        Sean Paul <seanpaul@...omium.org>
Subject: Re: [RFC v3 07/10] drm/i915/dpcd_bl: Move VESA backlight enabling
 code closer together

On Fri, Feb 05, 2021 at 06:45:11PM -0500, Lyude Paul wrote:
> No functional changes, just move set_vesa_backlight_enable() closer to it's
> only caller: intel_dp_aux_vesa_enable_backlight().
> 
> Signed-off-by: Lyude Paul <lyude@...hat.com>

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>

> ---
>  .../drm/i915/display/intel_dp_aux_backlight.c | 54 +++++++++----------
>  1 file changed, 27 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
> index f5ae2fb34c1f..431758058aa0 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
> @@ -270,33 +270,6 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi
>  }
>  
>  /* VESA backlight callbacks */
> -static void set_vesa_backlight_enable(struct intel_connector *connector, bool enable)
> -{
> -	struct intel_dp *intel_dp = intel_attached_dp(connector);
> -	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> -	u8 reg_val = 0;
> -
> -	/* Early return when display use other mechanism to enable backlight. */
> -	if (!connector->panel.backlight.edp.vesa.aux_enable)
> -		return;
> -
> -	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_EDP_DISPLAY_CONTROL_REGISTER, &reg_val) != 1) {
> -		drm_dbg_kms(&i915->drm, "Failed to read DPCD register 0x%x\n",
> -			    DP_EDP_DISPLAY_CONTROL_REGISTER);
> -		return;
> -	}
> -	if (enable)
> -		reg_val |= DP_EDP_BACKLIGHT_ENABLE;
> -	else
> -		reg_val &= ~(DP_EDP_BACKLIGHT_ENABLE);
> -
> -	if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_EDP_DISPLAY_CONTROL_REGISTER,
> -			       reg_val) != 1) {
> -		drm_dbg_kms(&i915->drm, "Failed to %s aux backlight\n",
> -			    enable ? "enable" : "disable");
> -	}
> -}
> -
>  static bool intel_dp_aux_vesa_backlight_dpcd_mode(struct intel_connector *connector)
>  {
>  	struct intel_dp *intel_dp = intel_attached_dp(connector);
> @@ -378,6 +351,33 @@ intel_dp_aux_vesa_set_backlight(const struct drm_connector_state *conn_state,
>  	}
>  }
>  
> +static void set_vesa_backlight_enable(struct intel_connector *connector, bool enable)
> +{
> +	struct intel_dp *intel_dp = intel_attached_dp(connector);
> +	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> +	u8 reg_val = 0;
> +
> +	/* Early return when display use other mechanism to enable backlight. */
> +	if (!connector->panel.backlight.edp.vesa.aux_enable)
> +		return;
> +
> +	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_EDP_DISPLAY_CONTROL_REGISTER, &reg_val) != 1) {
> +		drm_dbg_kms(&i915->drm, "Failed to read DPCD register 0x%x\n",
> +			    DP_EDP_DISPLAY_CONTROL_REGISTER);
> +		return;
> +	}
> +	if (enable)
> +		reg_val |= DP_EDP_BACKLIGHT_ENABLE;
> +	else
> +		reg_val &= ~(DP_EDP_BACKLIGHT_ENABLE);
> +
> +	if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_EDP_DISPLAY_CONTROL_REGISTER,
> +			       reg_val) != 1) {
> +		drm_dbg_kms(&i915->drm, "Failed to %s aux backlight\n",
> +			    enable ? "enable" : "disable");
> +	}
> +}
> +
>  static void
>  intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state,
>  				   const struct drm_connector_state *conn_state, u32 level)
> -- 
> 2.29.2
> 
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