edid: Remove all unnecessary EDID parameters parsing

This commit retains only necessary EDID parameters while
eliminating redundant EDID parsing in mutter

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2597
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2825>

src/backends/edid.h

@@ -30,39 +30,8 @@
 #include "core/util-private.h"
 
 typedef struct _MetaEdidInfo MetaEdidInfo;
-typedef struct _MetaEdidTiming MetaEdidTiming;
-typedef struct _MetaEdidDetailedTiming MetaEdidDetailedTiming;
 typedef struct _MetaEdidHdrStaticMetadata MetaEdidHdrStaticMetadata;
 
-typedef enum
-{
-  META_EDID_INTERFACE_UNDEFINED,
-  META_EDID_INTERFACE_DVI,
-  META_EDID_INTERFACE_HDMI_A,
-  META_EDID_INTERFACE_HDMI_B,
-  META_EDID_INTERFACE_MDDI,
-  META_EDID_INTERFACE_DISPLAY_PORT
-} MetaEdidInterface;
-
-typedef enum
-{
-  META_EDID_COLOR_TYPE_UNDEFINED,
-  META_EDID_COLOR_TYPE_MONOCHROME,
-  META_EDID_COLOR_TYPE_RGB,
-  META_EDID_COLOR_TYPE_OTHER_COLOR
-} MetaEdidColorType;
-
-typedef enum
-{
-  META_EDID_STEREO_TYPE_NO_STEREO,
-  META_EDID_STEREO_TYPE_FIELD_RIGHT,
-  META_EDID_STEREO_TYPE_FIELD_LEFT,
-  META_EDID_STEREO_TYPE_TWO_WAY_RIGHT_ON_EVEN,
-  META_EDID_STEREO_TYPE_TWO_WAY_LEFT_ON_EVEN,
-  META_EDID_STEREO_TYPE_FOUR_WAY_INTERLEAVED,
-  META_EDID_STEREO_TYPE_SIDE_BY_SIDE
-} MetaEdidStereoType;
-
 typedef enum
 {
   META_EDID_COLORIMETRY_XVYCC601    = (1 << 0),
@@ -90,51 +59,6 @@ typedef enum
   META_EDID_STATIC_METADATA_TYPE1 = 0,
 } MetaEdidStaticMetadataType;
 
-struct _MetaEdidTiming
-{
-  int width;
-  int height;
-  int frequency;
-};
-
-struct _MetaEdidDetailedTiming
-{
-  int		pixel_clock;
-  int		h_addr;
-  int		h_blank;
-  int		h_sync;
-  int		h_front_porch;
-  int		v_addr;
-  int		v_blank;
-  int		v_sync;
-  int		v_front_porch;
-  int		width_mm;
-  int		height_mm;
-  int		right_border;
-  int		top_border;
-  int		interlaced;
-  MetaEdidStereoType stereo;
-
-  int		digital_sync;
-  union
-  {
-    struct
-    {
-      int bipolar;
-      int serrations;
-      int sync_on_green;
-    } analog;
-
-    struct
-    {
-      int composite;
-      int serrations;
-      int negative_vsync;
-      int negative_hsync;
-    } digital;
-  } connector;
-};
-
 struct _MetaEdidHdrStaticMetadata
 {
   int available;
@@ -147,86 +71,25 @@ struct _MetaEdidHdrStaticMetadata
 
 struct _MetaEdidInfo
 {
-  int		checksum;
-  char		manufacturer_code[4];
-  int		product_code;
-  unsigned int	serial_number;
+  char manufacturer_code[4];
+  int product_code;
+  unsigned int serial_number;
 
-  int		production_week;	/* -1 if not specified */
-  int		production_year;	/* -1 if not specified */
-  int		model_year;		/* -1 if not specified */
+  double gamma;                         /* -1.0 if not specified */
 
-  int		major_version;
-  int		minor_version;
-
-  int		is_digital;
-
-  union
-  {
-    struct
-    {
-      int	bits_per_primary;
-      MetaEdidInterface interface;
-      int	rgb444;
-      int	ycrcb444;
-      int	ycrcb422;
-    } digital;
-
-    struct
-    {
-      double	video_signal_level;
-      double	sync_signal_level;
-      double	total_signal_level;
-
-      int	blank_to_black;
-
-      int	separate_hv_sync;
-      int	composite_sync_on_h;
-      int	composite_sync_on_green;
-      int	serration_on_vsync;
-      MetaEdidColorType color_type;
-    } analog;
-  } connector;
-
-  int		width_mm;		/* -1 if not specified */
-  int		height_mm;		/* -1 if not specified */
-  double	aspect_ratio;		/* -1.0 if not specififed */
-
-  double	gamma;			/* -1.0 if not specified */
-
-  int		standby;
-  int		suspend;
-  int		active_off;
-
-  int		srgb_is_standard;
-  int		preferred_timing_includes_native;
-  int		continuous_frequency;
-
-  double	red_x;
-  double	red_y;
-  double	green_x;
-  double	green_y;
-  double	blue_x;
-  double	blue_y;
-  double	white_x;
-  double	white_y;
-
-  MetaEdidTiming established[24];	/* Terminated by 0x0x0 */
-  MetaEdidTiming standard[8];
-
-  int		n_detailed_timings;
-  MetaEdidDetailedTiming detailed_timings[4];	/* If monitor has a preferred
-                                                 * mode, it is the first one
-                                                 * (whether it has, is
-                                                 * determined by the
-                                                 * preferred_timing_includes
-                                                 * bit.
-                                                 */
+  double red_x;
+  double red_y;
+  double green_x;
+  double green_y;
+  double blue_x;
+  double blue_y;
+  double white_x;
+  double white_y;
 
   /* Optional product description */
-  char		dsc_serial_number[14];
-  char		dsc_product_name[14];
-  char		dsc_string[14];		/* Unspecified ASCII data */
+  char dsc_serial_number[14];
+  char dsc_product_name[14];
+  char dsc_string[14];                  /* Unspecified ASCII data */
 
   MetaEdidColorimetry colorimetry;
   MetaEdidHdrStaticMetadata hdr_static_metadata;