1cf29703ee
Add a driver for laptops with NVIDIA Optimus (hybrid) graphics. The driver provides ACPI support for dynamically powering on and off the GPU, NVIDIA Dynamic Boost support, and a function for enabling the GPU power in romstage. References: - DG-09845-001: NVIDIA GN20/QN20 Hardware Design Guide - DG-09954-001: NVIDIA GN20/QN20 Software Design Guide Change-Id: I2dec7aa2c8db7994f78a7cc1220502676e248465 Signed-off-by: Jeremy Soller <jeremy@system76.com> Signed-off-by: Tim Crawford <tcrawford@system76.com>
97 lines
1.5 KiB
Plaintext
97 lines
1.5 KiB
Plaintext
/* SPDX-License-Identifier: GPL-2.0-only */
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/* NVIDIA GC6 on CFL and CML CPU PCIe ports */
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// Memory mapped PCI express config space
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OperationRegion (PCIC, SystemMemory, CONFIG_ECAM_MMCONF_BASE_ADDRESS + (CONFIG_DRIVERS_GFX_NVIDIA_BRIDGE << 15), 0x1000)
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Field (PCIC, ByteAcc, NoLock, Preserve) {
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PVID, 16,
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PDID, 16,
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Offset (0x248),
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, 7,
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L23E, 1, /* L23_Rdy Entry Request */
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L23R, 1, /* L23_Rdy to Detect Transition */
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Offset (0xC20),
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, 4,
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P0AP, 2, /* Additional power savings */
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Offset (0xC38),
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, 3,
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P0RM, 1, /* Robust squelch mechanism */
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}
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// Enter L23
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Method (DL23, 0, Serialized) {
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Printf(" GPU PORT DL23 START")
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L23E = 1
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Sleep (16)
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Local0 = 0
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While (L23E) {
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If ((Local0 > 4)) {
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Break
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}
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Sleep (16)
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Local0++
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}
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P0RM = 1
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P0AP = 3
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Printf(" GPU PORT DL23 FINISH")
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}
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// Exit L23
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Method (L23D, 0, Serialized) {
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Printf(" GPU PORT L23D START")
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L23R = 1
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Sleep (16)
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Local0 = 0
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While (L23R) {
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If ((Local0 > 4)) {
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Break
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}
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Sleep (16)
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Local0++
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}
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P0RM = 0
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P0AP = 0
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Printf(" GPU PORT L23D FINISH")
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}
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// Main power resource
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PowerResource (PWRR, 0, 0) {
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Name (_STA, 1)
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Method (_ON, 0, Serialized) {
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Printf("GPU PORT PWRR._ON")
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^^DEV0._ON()
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_STA = 1
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}
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Method (_OFF, 0, Serialized) {
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Printf("GPU PORT PWRR._OFF")
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^^DEV0._OFF()
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_STA = 0
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}
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}
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// Power resources for entering D0
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Name (_PR0, Package () { PWRR })
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// Power resources for entering D3
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Name (_PR3, Package () { PWRR })
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#include "common/gpu.asl"
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