IntelSiliconPkg: Add IgdOpRegion32.h to support IGD OpRegion v3.2

- Backlight related fields in MBOX2 has uncalibrated brightness support
- Valid Bit added for BCL in MBOX2.

Signed-off-by: Ck, Chitralekha <[email protected]>
Cc: Rangasai V Chaganty <[email protected]>
Cc: Ashraf Ali S <[email protected]>
Cc: Ray Ni <[email protected]>

IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion32.h

@@ -0,0 +1,58 @@
+/** @file
+  IGD OpRegion definition from Intel Integrated Graphics Device OpRegion
+  Specification based on version 3.2.
+
+  Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _IGD_OPREGION_3_2_H_
+#define _IGD_OPREGION_3_2_H_
+
+#include "IgdOpRegion30.h"
+
+#define IGD_OPREGION_HEADER_MBOX2_VER_3_2  BIT5
+
+#pragma pack(1)
+
+///
+/// Backlight Brightness for LFP1 and LFP2
+///
+typedef union {
+  struct {
+    UINT32    Brightness : 8;  ///< Backlight Brightness
+    UINT32    Rsvd       : 22; ///< Reserved Bit
+    UINT32    Ubs        : 1;  ///< Uncalibrated Brightness Support
+    UINT32    FValid     : 1;  ///< Field Valid Bit
+  } Bits;
+  UINT32    Data;
+} IGD_BCL;
+
+///
+/// OpRegion Mailbox 2 - Backlight communication
+/// Offset 0x200, Size 0x100
+///
+typedef struct {
+  IGD_BCL    BCL1;       ///< Offset 0x200 Backlight Brightness for LFP1
+  IGD_BCL    BCL2;       ///< Offset 0x204 Backlight Brightness for LFP2
+  UINT32     CBL1;       ///< Offset 0x208 Current User Brightness Level for LFP1
+  UINT32     CBL2;       ///< Offset 0x20C Current User Brightness Level for LFP2
+  UINT32     BCM1[0x1E]; ///< Offset 0x210 Backlight Brightness Levels Duty Cycle Mapping Table for LFP1
+  UINT32     BCM2[0x1E]; ///< Offset 0x288 Backlight Brightness Levels Duty Cycle Mapping Table for LFP2
+} IGD_OPREGION_MBOX2_VER_3_2;
+
+///
+/// IGD OpRegion Structure
+///
+typedef struct {
+  IGD_OPREGION_HEADER           Header; ///< OpRegion header (Offset 0x0, Size 0x100)
+  IGD_OPREGION_MBOX1_VER_3_0    MBox1;  ///< Mailbox 1: Public ACPI Methods (Offset 0x100, Size 0x100)
+  IGD_OPREGION_MBOX2_VER_3_2    MBox2;  ///< Mailbox 2: Backlight communication (Offset 0x200, Size 0x100)
+  IGD_OPREGION_MBOX3_VER_3_0    MBox3;  ///< Mailbox 3: BIOS to Driver Notification (Offset 0x300, Size 0x100)
+  IGD_OPREGION_MBOX4            MBox4;  ///< Mailbox 4: Video BIOS Table (VBT) (Offset 0x400, Size 0x1800)
+  IGD_OPREGION_MBOX5            MBox5;  ///< Mailbox 5: BIOS to Driver Notification Extension (Offset 0x1C00, Size 0x400)
+} IGD_OPREGION_STRUCTURE_VER_3_2;
+#pragma pack()
+
+#endif