isl: Add support for quering the string name of a format

src/intel/isl/isl.h

@@ -628,6 +628,7 @@ struct isl_channel_layout {
  */
 struct isl_format_layout {
    enum isl_format format;
+   const char *name;
 
    uint8_t bs; /**< Block size, in bytes, rounded towards 0 */
    uint8_t bw; /**< Block width, in pixels */
@@ -855,6 +856,12 @@ isl_format_get_layout(enum isl_format fmt)
    return &isl_format_layouts[fmt];
 }
 
+static inline const char * ATTRIBUTE_CONST
+isl_format_get_name(enum isl_format fmt)
+{
+   return isl_format_layouts[fmt].name;
+}
+
 bool isl_format_has_unorm_channel(enum isl_format fmt) ATTRIBUTE_CONST;
 bool isl_format_has_snorm_channel(enum isl_format fmt) ATTRIBUTE_CONST;
 bool isl_format_has_ufloat_channel(enum isl_format fmt) ATTRIBUTE_CONST;

src/intel/isl/isl_format_layout_gen.bash

@@ -98,7 +98,8 @@ do
 
     cat <<EOF
    [$format] = {
-      $format,
+      .format = $format,
+      .name = "$format",
       .bs = $((bpb/8)),
       .bw = $bw, .bh = $bh, .bd = $bd,
       .channels = {