Re: [edk2-devel] [PATCH] IntelSiliconPkg: Add IgdOpRegion32.h to support IGD OpRegion v3.2

["Ck, Chitralekha" <chitralekha.ck@intel.com>]

PR : https://github.com/tianocore/edk2-platforms/pull/177

-----Original Message-----
From: Ck, Chitralekha <chitralekha.ck@intel.com> 
Sent: Tuesday, August 6, 2024 11:01 AM
To: devel@edk2.groups.io
Cc: Ck, Chitralekha <chitralekha.ck@intel.com>; Ck; Chaganty, Rangasai V <rangasai.v.chaganty@intel.com>; S, Ashraf Ali <ashraf.ali.s@intel.com>; Ni, Ray <ray.ni@intel.com>
Subject: [PATCH] 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 <chitralekha.ck@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>
Cc: Ashraf Ali S <ashraf.ali.s@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
---
 .../Include/IndustryStandard/IgdOpRegion32.h  | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Silicon/Intel/IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion32.h

diff --git a/Silicon/Intel/IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion32.h b/Silicon/Intel/IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion32.h
new file mode 100644
index 00000000..657a1a6c
--- /dev/null
+++ b/Silicon/Intel/IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion
+++ 32.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 {
+  typedef 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
\ No newline at end of file
--
2.42.0.windows.2



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