diff --git a/libsystem/include/system/graphics.h b/libsystem/include/system/graphics.h
index 1b6060a4e..a3c23b20c 100644
--- a/libsystem/include/system/graphics.h
+++ b/libsystem/include/system/graphics.h
@@ -59,12 +59,14 @@ typedef android_hdr_t android_hdr;
 
 /*
  * Structure for describing YCbCr formats for consumption by applications.
- * This is used with HAL_PIXEL_FORMAT_YCbCr_*_888.
+ * This is used with HAL_PIXEL_FORMAT_YCbCr_*.
  *
  * Buffer chroma subsampling is defined in the format.
  * e.g. HAL_PIXEL_FORMAT_YCbCr_420_888 has subsampling 4:2:0.
  *
- * Buffers must have a 8 bit depth.
+ * Buffers must have a byte aligned channel depth or a byte aligned packed
+ * channel depth (e.g. 10 bits packed into 16 bits for
+ * HAL_PIXEL_FORMAT_YCbCr_P010).
  *
  * y, cb, and cr point to the first byte of their respective planes.
  *
@@ -75,8 +77,8 @@ typedef android_hdr_t android_hdr;
  * cstride is the stride of the chroma planes.
  *
  * chroma_step is the distance in bytes from one chroma pixel value to the
- * next.  This is 2 bytes for semiplanar (because chroma values are interleaved
- * and each chroma value is one byte) and 1 for planar.
+ * next.  This is `2 * channel depth` bytes for semiplanar (because chroma
+ * values are interleaved) and `1 * channel depth` bytes for planar.
  */
 
 struct android_ycbcr {