diff --git a/src/add-ons/accelerants/radeon_hd/atombios/ObjectID.h b/src/add-ons/accelerants/radeon_hd/atombios/ObjectID.h
index 06192698bd..5b393622f5 100644
--- a/src/add-ons/accelerants/radeon_hd/atombios/ObjectID.h
+++ b/src/add-ons/accelerants/radeon_hd/atombios/ObjectID.h
@@ -136,6 +136,7 @@
 #define GENERIC_OBJECT_ID_PX2_NON_DRIVABLE        0x02
 #define GENERIC_OBJECT_ID_MXM_OPM                 0x03
 #define GENERIC_OBJECT_ID_STEREO_PIN              0x04        //This object could show up from Misc Object table, it follows ATOM_OBJECT format, and contains one ATOM_OBJECT_GPIO_CNTL_RECORD for the stereo pin
+#define GENERIC_OBJECT_ID_BRACKET_LAYOUT          0x05
 
 /****************************************************/
 /* Graphics Object ENUM ID Definition               */
@@ -714,6 +715,13 @@
                                                  GRAPH_OBJECT_ENUM_ID1 << ENUM_ID_SHIFT |\
                                                  GENERIC_OBJECT_ID_STEREO_PIN << OBJECT_ID_SHIFT)
 
+#define GENERICOBJECT_BRACKET_LAYOUT_ENUM_ID1    (GRAPH_OBJECT_TYPE_GENERIC << OBJECT_TYPE_SHIFT |\
+                                                 GRAPH_OBJECT_ENUM_ID1 << ENUM_ID_SHIFT |\
+                                                 GENERIC_OBJECT_ID_BRACKET_LAYOUT << OBJECT_ID_SHIFT)
+
+#define GENERICOBJECT_BRACKET_LAYOUT_ENUM_ID2    (GRAPH_OBJECT_TYPE_GENERIC << OBJECT_TYPE_SHIFT |\
+                                                 GRAPH_OBJECT_ENUM_ID2 << ENUM_ID_SHIFT |\
+                                                 GENERIC_OBJECT_ID_BRACKET_LAYOUT << OBJECT_ID_SHIFT)
 /****************************************************/
 /* Object Cap definition - Shared with BIOS         */
 /****************************************************/
diff --git a/src/add-ons/accelerants/radeon_hd/atombios/atom.h b/src/add-ons/accelerants/radeon_hd/atombios/atom.h
index 18b91a6b3e..27e31cb109 100644
--- a/src/add-ons/accelerants/radeon_hd/atombios/atom.h
+++ b/src/add-ons/accelerants/radeon_hd/atombios/atom.h
@@ -51,6 +51,7 @@ struct card_info {
 #define ATOM_ATI_MAGIC_PTR	0x30
 #define ATOM_ATI_MAGIC		" 761295520"
 #define ATOM_ROM_TABLE_PTR	0x48
+#define ATOM_ROM_PART_NUMBER_PTR	0x6E
 
 #define ATOM_ROM_MAGIC		"ATOM"
 #define ATOM_ROM_MAGIC_PTR	4
@@ -63,6 +64,7 @@ struct card_info {
 #define ATOM_CMD_SETSCLK	0x0A
 #define ATOM_CMD_SETMCLK	0x0B
 #define ATOM_CMD_SETPCLK	0x0C
+#define ATOM_CMD_SPDFANCNTL	0x39
 
 #define ATOM_DATA_FWI_PTR	0xC
 #define ATOM_DATA_IIO_PTR	0x32
@@ -87,8 +89,8 @@ struct card_info {
 #define ATOM_ARG_REG		0
 #define ATOM_ARG_PS		1
 #define ATOM_ARG_WS		2
-#define ATOM_ARG_ID		4
 #define ATOM_ARG_FB		3
+#define ATOM_ARG_ID		4
 #define ATOM_ARG_IMM		5
 #define ATOM_ARG_PLL		6
 #define ATOM_ARG_MC		7
diff --git a/src/add-ons/accelerants/radeon_hd/atombios/atombios.h b/src/add-ons/accelerants/radeon_hd/atombios/atombios.h
index fee40d72cd..d9044c9b27 100644
--- a/src/add-ons/accelerants/radeon_hd/atombios/atombios.h
+++ b/src/add-ons/accelerants/radeon_hd/atombios/atombios.h
@@ -191,7 +191,7 @@
 #define HW_ASSISTED_I2C_STATUS_FAILURE     2
 #define HW_ASSISTED_I2C_STATUS_SUCCESS     1
 
-#pragma pack(1)                                       // BIOS data must use byte aligment
+#pragma pack(1)                                       // BIOS data must use byte alignment
 
 // Define offset to location of ROM header.
 #define OFFSET_TO_POINTER_TO_ATOM_ROM_HEADER         0x00000048L
@@ -497,6 +497,7 @@ typedef struct _COMPUTE_MEMORY_ENGINE_PLL_PARAMETERS_V3
   union
   {
     ATOM_COMPUTE_CLOCK_FREQ  ulClock;         //Input Parameter
+    ULONG ulClockParams;                      //ULONG access for BE
     ATOM_S_MPLL_FB_DIVIDER   ulFbDiv;         //Output Parameter
   };
   UCHAR   ucRefDiv;                           //Output Parameter
@@ -529,6 +530,7 @@ typedef struct _COMPUTE_MEMORY_ENGINE_PLL_PARAMETERS_V5
   union
   {
     ATOM_COMPUTE_CLOCK_FREQ  ulClock;         //Input Parameter
+    ULONG ulClockParams;                      //ULONG access for BE
     ATOM_S_MPLL_FB_DIVIDER   ulFbDiv;         //Output Parameter
   };
   UCHAR   ucRefDiv;                           //Output Parameter
@@ -633,6 +635,13 @@ typedef struct _COMPUTE_MEMORY_CLOCK_PARAM_PARAMETERS_V2_2
   ULONG ulReserved;
 }COMPUTE_MEMORY_CLOCK_PARAM_PARAMETERS_V2_2;
 
+typedef struct _COMPUTE_MEMORY_CLOCK_PARAM_PARAMETERS_V2_3
+{
+  COMPUTE_MEMORY_ENGINE_PLL_PARAMETERS_V4 ulClock;
+  USHORT  usMclk_fcw_frac;                  //fractional divider of fcw = usSclk_fcw_frac/65536
+  USHORT  usMclk_fcw_int;                   //integer divider of fcwc
+}COMPUTE_MEMORY_CLOCK_PARAM_PARAMETERS_V2_3;
+
 //Input parameter of DynamicMemorySettingsTable
 //when ATOM_COMPUTE_CLOCK_FREQ.ulComputeClockFlag = COMPUTE_MEMORY_PLL_PARAM
 typedef struct _DYNAMICE_MEMORY_SETTINGS_PARAMETER
@@ -4100,7 +4109,7 @@ typedef struct  _ATOM_LCD_MODE_CONTROL_CAP
 typedef struct _ATOM_FAKE_EDID_PATCH_RECORD
 {
   UCHAR ucRecordType;
-  UCHAR ucFakeEDIDLength;       // = 128 means EDID lenght is 128 bytes, otherwise the EDID length = ucFakeEDIDLength*128
+  UCHAR ucFakeEDIDLength;       // = 128 means EDID length is 128 bytes, otherwise the EDID length = ucFakeEDIDLength*128
   UCHAR ucFakeEDIDString[1];    // This actually has ucFakeEdidLength elements.
 } ATOM_FAKE_EDID_PATCH_RECORD;