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-rw-r--r--drivers/gpu/drm/i915/i915_drv.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ce30bb3ed566..0d7e55f2a8a2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1232,6 +1232,12 @@ enum modeset_restore {
};
struct ddi_vbt_port_info {
+ /*
+ * This is an index in the HDMI/DVI DDI buffer translation table.
+ * The special value HDMI_LEVEL_SHIFT_UNKNOWN means the VBT didn't
+ * populate this field.
+ */
+#define HDMI_LEVEL_SHIFT_UNKNOWN 0xff
uint8_t hdmi_level_shift;
uint8_t supports_dvi:1;