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drm: add bit depth parsing

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EDID 1.4 digital monitors report the bit depth supported in the input
field.  Add support for parsing this out and storing the info in the
display_info structure for use by drivers.

[airlied: tweaked to fix inter-patch dependency]
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jesse Barnes
2011-04-15 12:49:23 -07:00
committed by Dave Airlie
parent e8e7a2b8cc
commit 3b11228b54
3 changed files with 69 additions and 3 deletions
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54
drivers/gpu/drm/drm_edid.c
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@@ -1412,6 +1412,57 @@ end:
}
EXPORT_SYMBOL(drm_detect_monitor_audio);
/**
* drm_add_display_info - pull display info out if present
* @edid: EDID data
* @info: display info (attached to connector)
*
* Grab any available display info and stuff it into the drm_display_info
* structure that's part of the connector. Useful for tracking bpp and
* color spaces.
*/
static void drm_add_display_info(struct edid *edid,
struct drm_display_info *info)
{
info->width_mm = edid->width_cm * 10;
info->height_mm = edid->height_cm * 10;
/* driver figures it out in this case */
info->bpc = 0;
/* Only defined for 1.4 with digital displays */
if (edid->revision < 4)
return;
if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
return;
switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
case DRM_EDID_DIGITAL_DEPTH_6:
info->bpc = 6;
break;
case DRM_EDID_DIGITAL_DEPTH_8:
info->bpc = 8;
break;
case DRM_EDID_DIGITAL_DEPTH_10:
info->bpc = 10;
break;
case DRM_EDID_DIGITAL_DEPTH_12:
info->bpc = 12;
break;
case DRM_EDID_DIGITAL_DEPTH_14:
info->bpc = 14;
break;
case DRM_EDID_DIGITAL_DEPTH_16:
info->bpc = 16;
break;
case DRM_EDID_DIGITAL_DEPTH_UNDEF:
default:
info->bpc = 0;
break;
}
}
/**
* drm_add_edid_modes - add modes from EDID data, if available
* @connector: connector we're probing
@@ -1460,8 +1511,7 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
edid_fixup_preferred(connector, quirks);
connector->display_info.width_mm = edid->width_cm * 10;
connector->display_info.height_mm = edid->height_cm * 10;
drm_add_display_info(edid, &connector->display_info);
return num_modes;
}