Re: [PATCH] drm/edid: Add CEA modes before inferred modes

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On Fri, May 08, 2015 at 05:45:07PM +0300, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> 
> Currently we're adding CEA modes after the inferred modes, which means
> we might get multiple modes that are very close to each other, but
> slightly different, which seems a bit silly. That's because duplicate
> mode check that occurs when adding inferred modes would not consider
> CEA modes as potential duplicates. Reverse the order so that CEA
> modes get added before inferred modes, and are thus considered potential
> duplicates.
> 
> Or as ajax put it on irc:
> "< ajax> the point of the "pick a timing formula" heuristic was to
> generate something the sink could _likely_ sink.  if it tells us
> timings it can sink explicitly then second-guessing seems dumb."
> 
> Cc: Adam Jackson <ajax@xxxxxxxxxx>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

Applied to topic/drm-misc, thanks.
-Daniel

> ---
>  drivers/gpu/drm/drm_edid.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index e7a1400..314a364 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3744,10 +3744,10 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
>  	num_modes += add_cvt_modes(connector, edid);
>  	num_modes += add_standard_modes(connector, edid);
>  	num_modes += add_established_modes(connector, edid);
> -	if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
> -		num_modes += add_inferred_modes(connector, edid);
>  	num_modes += add_cea_modes(connector, edid);
>  	num_modes += add_alternate_cea_modes(connector, edid);
> +	if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
> +		num_modes += add_inferred_modes(connector, edid);
>  
>  	if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
>  		edid_fixup_preferred(connector, quirks);
> -- 
> 2.0.5
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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