drm/edid: add #defines for ELD versions

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@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 87d85e81d3a7e076a36e35eb65b94ca7ecbc8751..799050198323e852c7cbb45e3c1236cc67d386ac 100644 (file)
--- 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! */