diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-04-15 12:49:23 -0700 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-04-28 14:42:58 +1000 |
| commit | 3b11228b54cc6bda4a72bb22984203c6eff4338a (patch) | |
| tree | accdc0765e163c0384b37b70f9f1601bc99fc52a /drivers/gpu/drm/drm_edid.c | |
| parent | e8e7a2b8ccfdae0d4cb6bd25824bbedcd42da316 (diff) | |
| download | linux-3.10-3b11228b54cc6bda4a72bb22984203c6eff4338a.tar.gz linux-3.10-3b11228b54cc6bda4a72bb22984203c6eff4338a.tar.bz2 linux-3.10-3b11228b54cc6bda4a72bb22984203c6eff4338a.zip | |
drm: add bit depth parsing
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>
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 54 |
1 files changed, 52 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index adc9358c9be..fe0d3dcd4d3 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1413,6 +1413,57 @@ 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 * @edid: edid data @@ -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; } |