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path: root/drivers/gpu/drm/drm_edid.c
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Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
-rw-r--r--drivers/gpu/drm/drm_edid.c61
1 files changed, 59 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index adc9358c9bec..0a9357c66ff8 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1413,6 +1413,64 @@ 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;
+ info->color_formats = 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;
+ }
+
+ info->color_formats = DRM_COLOR_FORMAT_RGB444;
+ if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
+ info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
+ if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
+ info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
+}
+
+/**
* drm_add_edid_modes - add modes from EDID data, if available
* @connector: connector we're probing
* @edid: edid data
@@ -1460,8 +1518,7 @@ 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;
}