[PATCH RESEND] drm/edid: add #defines for ELD versions

[Ville Syrjälä]

On Mon, Apr 13, 2015 at 10:57:14AM +0300, Jani Nikula wrote:
> Add ELD versions according to HDA Specification v1.0a.
> 
> 2 indicates version 2, which supports CEA_Ver 861D or below. Maximum
> Baseline ELD size of 80 bytes (15 SAD count).
> 
> 31 indicates an ELD that has been partially populated through
> implementation specific mean of default programming before an external
> graphics driver is loaded. Only the field that is called out as "canned"
> field will be populated, and audio driver should ignore the non "canned"
> field.
> 
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>

Matches the spec.

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  include/drm/drm_edid.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index 87d85e81d3a7..799050198323 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -215,6 +215,8 @@ struct detailed_timing {
>  #define DRM_ELD_VER			0
>  # define DRM_ELD_VER_SHIFT		3
>  # define DRM_ELD_VER_MASK		(0x1f << 3)
> +# define DRM_ELD_VER_CEA861D		(2 << 3) /* supports 861D or below */
> +# define DRM_ELD_VER_CANNED		(0x1f << 3)
>  
>  #define DRM_ELD_BASELINE_ELD_LEN	2	/* in dwords! */
>  
> -- 
> 2.1.4
> 
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-- 
Ville Syrjälä
Intel OTC