[Intel-gfx] [PATCH] drm/i915/cnl: Add missing type case.

[Dhinakaran Pandiyan]

On Monday, July 10, 2017 1:58:52 PM PDT Rodrigo Vivi wrote:
> Paulo had noticed that inside cnl_ddi_vswing_program
> the case was handling voltage but with no indication
> of type where a missing type could also take us to that
> path. So my first attempt was to add a message to
> let clear who trigger that path.
> 
> However DK had a better idea that is to handle the
> missed type sooner before it might take to that path.
> So this v2 here uses his approach.
> 
> v2: Handle missed type sooner.
> 
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_ddi.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c
> b/drivers/gpu/drm/i915/intel_ddi.c index 241decf2a7d9..efb13582dc73 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1979,9 +1979,12 @@ static void cnl_ddi_vswing_sequence(struct
> intel_encoder *encoder, u32 level) if ((intel_dp) && (type ==
> INTEL_OUTPUT_EDP || type == INTEL_OUTPUT_DP)) { width =
> intel_dp->lane_count;
>  		rate = intel_dp->link_rate;
> -	} else {
> +	} else if (type == INTEL_OUTPUT_HDMI) {
>  		width = 4;
>  		/* Rate is always < than 6GHz for HDMI */
> +	} else {
> +		MISSING_CASE(type);
> +		return;
>  	}
> 
>  	/*

The early return in this version avoids register writes for invalid encoder 
types. So,
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>