Re: [PATCH 1/8] drm/i915: Remove checks for clone config with LVDS in ILK+ dpll code

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

On Mon, Mar 14, 2016 at 10:55:40AM +0200, Ander Conselvan de Oliveira wrote:
> LVDS is not cloneable, so the check is unnecessary. Removing it makes
> the surrouding code a bit simpler.
> 
> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 31 ++++---------------------------
>  1 file changed, 4 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 2d151ad..e7d6584 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -8593,30 +8593,9 @@ static int ironlake_get_refclk(struct intel_crtc_state *crtc_state)
>  {
>  	struct drm_device *dev = crtc_state->base.crtc->dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> -	struct drm_atomic_state *state = crtc_state->base.state;
> -	struct drm_connector *connector;
> -	struct drm_connector_state *connector_state;
> -	struct intel_encoder *encoder;
> -	int num_connectors = 0, i;
> -	bool is_lvds = false;
> -
> -	for_each_connector_in_state(state, connector, connector_state, i) {
> -		if (connector_state->crtc != crtc_state->base.crtc)
> -			continue;
> -
> -		encoder = to_intel_encoder(connector_state->best_encoder);
> -
> -		switch (encoder->type) {
> -		case INTEL_OUTPUT_LVDS:
> -			is_lvds = true;
> -			break;
> -		default:
> -			break;
> -		}
> -		num_connectors++;
> -	}
>  
> -	if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {

We have the exact same checks in the gmch code as well. For consistency
you should change those as well.

> +	if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_LVDS) &&
> +	    intel_panel_use_ssc(dev_priv)) {
>  		DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n",
>  			      dev_priv->vbt.lvds_ssc_freq);
>  		return dev_priv->vbt.lvds_ssc_freq;
> @@ -8842,7 +8821,7 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
>  	struct drm_connector_state *connector_state;
>  	struct intel_encoder *encoder;
>  	uint32_t dpll;
> -	int factor, num_connectors = 0, i;
> +	int factor, i;
>  	bool is_lvds = false, is_sdvo = false;
>  
>  	for_each_connector_in_state(state, connector, connector_state, i) {
> @@ -8862,8 +8841,6 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
>  		default:
>  			break;
>  		}
> -
> -		num_connectors++;
>  	}
>  
>  	/* Enable autotuning of the PLL clock (if permissible) */
> @@ -8917,7 +8894,7 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
>  		break;
>  	}
>  
> -	if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
> +	if (is_lvds && intel_panel_use_ssc(dev_priv))
>  		dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
>  	else
>  		dpll |= PLL_REF_INPUT_DREFCLK;
> -- 
> 2.4.3
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx