Refactor GC6 support for all boards

Change-Id: Id9191c76e0055d5f02a1de8c25a35cf05718c092

src/drivers/gfx/nvidia/acpi/coffeelake.asl

@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* NVIDIA GC6 on CFL and CML CPU PCIe ports */
+
+// Memory mapped PCI express config space
+OperationRegion (PCIC, SystemMemory, CONFIG_ECAM_MMCONF_BASE_ADDRESS + (CONFIG_DRIVERS_GFX_NVIDIA_BRIDGE << 15), 0x1000)
+
+Field (PCIC, ByteAcc, NoLock, Preserve) {
+	PVID,   16,
+	PDID,   16,
+
+	Offset (0x248),
+		,   7,
+	L23E,   1,      /* L23_Rdy Entry Request */
+	L23R,   1,      /* L23_Rdy to Detect Transition */
+
+	Offset (0xC20),
+		,   4,
+	P0AP,   2,      /* Additional power savings */
+
+	Offset (0xC38),
+		,   3,
+	P0RM,   1,      /* Robust squelch mechanism */
+}
+
+// Enter L23
+Method (DL23, 0, Serialized) {
+	Printf("      GPU PORT DL23 START")
+
+	L23E = 1
+	Sleep (16)
+	Local0 = 0
+	While (L23E) {
+		If ((Local0 > 4)) {
+			Break
+		}
+
+		Sleep (16)
+		Local0++
+	}
+
+	P0RM = 1
+	P0AP = 3
+
+	Printf("      GPU PORT DL23 FINISH")
+}
+
+// Exit L23
+Method (L23D, 0, Serialized) {
+	Printf("      GPU PORT L23D START")
+
+	L23R = 1
+	Sleep (16)
+	Local0 = 0
+	While (L23R) {
+		If ((Local0 > 4)) {
+			Break
+		}
+
+		Sleep (16)
+		Local0++
+	}
+
+	P0RM = 0
+	P0AP = 0
+
+	Printf("      GPU PORT L23D FINISH")
+}
+
+// Main power resource
+PowerResource (PWRR, 0, 0) {
+	Name (_STA, 1)
+
+	Method (_ON, 0, Serialized) {
+		Printf("GPU PORT PWRR._ON")
+
+		^^DEV0._ON()
+
+		_STA = 1
+	}
+
+	Method (_OFF, 0, Serialized) {
+		Printf("GPU PORT PWRR._OFF")
+
+		^^DEV0._OFF()
+
+		_STA = 0
+	}
+}
+
+// Power resources for entering D0
+Name (_PR0, Package () { PWRR })
+
+// Power resources for entering D3
+Name (_PR3, Package () { PWRR })
+
+#include "common/gpu.asl"

src/drivers/gfx/nvidia/acpi/common/dsm.asl

@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#define NV_ERROR_SUCCESS 0x0
+#define NV_ERROR_UNSPECIFIED 0x80000001
+#define NV_ERROR_UNSUPPORTED 0x80000002
+
+#include "nvjt.asl"
+
+Method (_DSM, 4, Serialized) {
+	Printf("GPU _DSM")
+	If (Arg0 == ToUUID (JT_DSM_GUID)) {
+		If (ToInteger(Arg1) >= JT_REVISION_ID_MIN) {
+			Return (NVJT(Arg2, Arg3))
+		} Else {
+			Printf("  Unsupported JT revision: %o", SFST(Arg1))
+			Return (NV_ERROR_UNSUPPORTED)
+		}
+	} Else {
+		Printf("  Unsupported GUID: %o", IDST(Arg0))
+		Return (NV_ERROR_UNSPECIFIED)
+	}
+}

src/drivers/gfx/nvidia/acpi/common/gpu.asl

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+Device (DEV0) {
+	Name(_ADR, 0x00000000)
+
+	#include "utility.asl"
+	#include "dsm.asl"
+	#include "power.asl"
+}

src/drivers/gfx/nvidia/acpi/common/nvjt.asl

@@ -0,0 +1,152 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#define JT_DSM_GUID "CBECA351-067B-4924-9CBD-B46B00B86F34"
+#define JT_REVISION_ID_MIN 0x00000100
+#define JT_REVISION_ID_MAX 0x00000200
+#define JT_FUNC_SUPPORT 0x00000000
+#define JT_FUNC_CAPS 0x00000001
+#define JT_FUNC_POWERCONTROL 0x00000003
+
+//TODO: SMI traps and EGIN/XCLM
+#define JT_GPC_GSS 0 // Get current GPU GCx sleep status
+#define JT_GPC_EGNS 1 // Enter GC6 without self-refresh
+#define JT_GPC_EGIS 2 // Enter GC6 with self-refresh
+#define JT_GPC_XGXS 3 // Exit GC6 and stop self-refresh
+#define JT_GPC_XGIS 4 // Exit GC6 for self-refresh update
+
+#define JT_DFGC_NONE 0 // Handle request immediately
+#define JT_DFGC_DEFER 1 // Defer GPC and GPCX
+//TODO #define JT_DFGC_CLEAR 2 // Clear pending requests
+
+// Deferred GC6 enter/exit until D3-cold (saved DFGC)
+Name(DFEN, 0)
+
+// Deferred GC6 enter control (saved GPC)
+Name(DFCI, 0)
+
+// Deferred GC6 exit control (saved GPCX)
+Name(DFCO, 0)
+
+Method (NVJT, 2, Serialized) {
+	Printf("  GPU NVJT")
+	Switch (ToInteger(Arg0)) {
+		Case (JT_FUNC_SUPPORT) {
+			Printf("    Supported Functions")
+			Return(ITOB(
+				(1 << JT_FUNC_SUPPORT) |
+				(1 << JT_FUNC_CAPS) |
+				(1 << JT_FUNC_POWERCONTROL)
+			))
+		}
+		Case (JT_FUNC_CAPS) {
+			Printf("    Capabilities")
+			Return(ITOB(
+				(1 << 0) | // G-SYNC NSVR power-saving features are enabled
+				(1 << 1) | // NVSR disabled
+				(2 << 3) | // Panel power and backlight are on the suspend rail
+				(0 << 5) | // self-refresh controller remains powered while panel is powered
+				(0 << 6) | // FB is not on the suspend rail but is powered on in GC6
+				(0 << 8) | // Combined power rail for all GPUs
+				(0 << 10) | // External SPI ROM
+				(1 << 11) | // No SMI handler for kernel panic exit while in GC6
+				(0 << 12) | // Supports notify on GC6 state done
+				(1 << 13) | // Support deferred GC6
+				(1 << 14) | // Support fine-grained root port control
+				(2 << 15) | // GC6 version is GC6-R
+				(0 << 17) | // GC6 exit ISR is not supported
+				(0 << 18) | // GC6 self wakeup not supported
+				(JT_REVISION_ID_MAX << 20) // Highest revision supported
+			))
+		}
+		Case (JT_FUNC_POWERCONTROL) {
+			Printf("    Power Control: %o", SFST(Arg1))
+
+			CreateField (Arg1, 0, 3, GPC) // GPU power control
+			CreateField (Arg1, 4, 1, PPC) // Panel power control
+			CreateField (Arg1, 14, 2, DFGC) // Defer GC6 enter/exit until D3 cold
+			CreateField (Arg1, 16, 3, GPCX) // Deferred GC6 exit control
+
+			// Save deferred GC6 request
+			If ((ToInteger(GPC) != 0) || (ToInteger(DFGC) != 0)) {
+				DFEN = DFGC
+				DFCI = GPC
+				DFCO = GPCX
+			}
+
+			// Buffer to cache current state
+			Name (JTBF, Buffer (4) { 0, 0, 0, 0 })
+			CreateField (JTBF, 0, 3, CGCS) // Current GC state
+			CreateField (JTBF, 3, 1, CGPS) // Current GPU power status
+			CreateField (JTBF, 7, 1, CPSS) // Current panel and SRC state (0 when on)
+
+			// If doing deferred GC6 request, return now
+			If (ToInteger(DFGC) != 0) {
+				CGCS = 1
+				CGPS = 1
+				Return (JTBF)
+			}
+
+			// Apply requested state
+			Switch (ToInteger(GPC)) {
+				Case (JT_GPC_GSS) {
+					Printf("    Get current GPU GCx sleep status")
+					//TODO: include transitions!
+					If (GTXS(DGPU_RST_N)) {
+						// GPU powered on
+						CGCS = 1
+						CGPS = 1
+					} ElseIf (GTXS(DGPU_PWR_EN)) {
+						// GPU powered off, GC6
+						CGCS = 3
+						CGPS = 0
+					} Else {
+						// GPU powered off, D3 cold
+						CGCS = 2
+						CGPS = 0
+					}
+				}
+				Case (JT_GPC_EGNS) {
+					Printf("    Enter GC6 without self-refresh")
+					GC6I()
+					CPSS = 1
+				}
+				Case (JT_GPC_EGIS) {
+					Printf("    Enter GC6 with self-refresh")
+					GC6I()
+					If (ToInteger(PPC) == 0) {
+						CPSS = 0
+					}
+				}
+				Case (JT_GPC_XGXS) {
+					Printf("    Exit GC6 and stop self-refresh")
+					GC6O()
+
+					CGCS = 1
+					CGPS = 1
+					If (ToInteger(PPC) != 0) {
+						CPSS = 0
+					}
+				}
+				Case (JT_GPC_XGIS) {
+					Printf("    Exit GC6 for self-refresh update")
+					GC6O()
+
+					CGCS = 1
+					CGPS = 1
+					If (ToInteger(PPC) != 0) {
+						CPSS = 0
+					}
+				}
+				Default {
+					Printf("    Unsupported GPU power control: %o", SFST(GPC))
+				}
+			}
+
+			Return (JTBF)
+		}
+		Default {
+			Printf("    Unsupported function: %o", SFST(Arg0))
+			Return (NV_ERROR_UNSUPPORTED)
+		}
+	}
+}