mb/google/brya: Add GPS _DSM subfunction support for Nvidia GPU
The _DSM subfunction for the Nvidia GN20 supports 1 additional subfunction, known as GPS, which is required to support GPU Boost. This implementation is minimal, essentially letting the GPU manage its own temperature. BUG=b:214581372 TEST=abuild Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Change-Id: I21331bd811a13212f3825bda44be44d1b5ae7c74 Reviewed-on: https://review.coreboot.org/c/coreboot/+/64995 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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#define GPS_FUNC_SUPPORT 0
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#define GPS_FUNC_GETCALLBACKS 0x13
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#define GPS_FUNC_PSHARESTATUS 0x20
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#define GPS_FUNC_PSHAREPARAMS 0x2a
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#define QUERY_GET_STATUS 0
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#define QUERY_GET_SUPPORTED_FIELDS 1
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#define QUERY_GET_CURRENT_LIMITS 2
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/* GPS return Package */
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Name (GPSP, Buffer (0x28) {0x0})
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CreateDWordField (GPSP, 0, RETN)
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CreateDWordField (GPSP, 4, VRV1)
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CreateDWordField (GPSP, 8, TGPU)
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/* GETCALLBACKS return value
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[0]: Callback for post-mode set
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[1]: Callback for pre-mode set
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[2]: Callback for post power state transition */
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Name (GPSR, Buffer (4) { 0x4, 0x0, 0x0, 0x0 })
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Method (GPS, 2, Serialized)
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{
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Switch (ToInteger (Arg0))
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{
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Case (GPS_FUNC_SUPPORT)
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{
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Return (ITOB(
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(1 << GPS_FUNC_SUPPORT) |
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(1 << GPS_FUNC_GETCALLBACKS) |
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(1 << GPS_FUNC_PSHARESTATUS) |
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(1 << GPS_FUNC_PSHAREPARAMS)))
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}
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Case (GPS_FUNC_GETCALLBACKS)
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{
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CreateDWordField (Arg1, 0, QURY)
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/* Driver querying for which callbacks the ACPI code
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wants callbacks for. */
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If (QURY == 0)
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{
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Return (GPSR)
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}
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If (QURY & 0x4)
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{
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Printf("GPS: Kernel driver callback post power state transition")
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Return (GPSR)
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}
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}
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Case (GPS_FUNC_PSHARESTATUS)
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{
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Return (ITOB(
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(0 << 0) | /* GPS_FUNC_PSHAREPARAMS should not be called
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again after initialization, i.e., its return
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value is not dynamically updated. */
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(1 << 0) | /* System uses both a GPIO and ACPI notification
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codes to set multiple GPU power limits. */
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(0 << 21))) /* EDPpeak limit is default */
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}
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Case (GPS_FUNC_PSHAREPARAMS)
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{
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CreateField (Arg1, 0, 4, QUTY) /* Query type */
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/* Version of return value */
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VRV1 = 0x10000
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Switch (ToInteger (QUTY))
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{
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Case (QUERY_GET_STATUS)
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{
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Return (GPSP)
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}
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Case (QUERY_GET_SUPPORTED_FIELDS)
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{
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/* Only GPU temperature is supported */
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RETN = 0x100 | ToInteger (QUTY)
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Return (GPSP)
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}
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Case (QUERY_GET_CURRENT_LIMITS)
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{
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/* Request a limit of '0' for the GPU temperature,
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meaning there is no limit. */
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RETN = 0x102
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TGPU = 0
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Return (GPSP)
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}
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}
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}
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}
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Return (NV_ERROR_UNSUPPORTED)
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}
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@ -39,8 +39,10 @@
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#define UUID_NVJT "cbeca351-067b-4924-9cbd-b46b00b86f34"
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#define UUID_NBCI "d4a50b75-65c7-46f7-bfb7-41514cea0244"
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#define UUID_NVPCF "36b49710-2483-11e7-9598-0800200c9a66"
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#define UUID_GPS "a3132d01-8cda-49ba-a52e-bc9d46df6b81"
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#define REVISION_MIN_NVOP 0x100
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#define REVISION_MIN_NVJT 0x100
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#define REVISION_MIN_NBCI 0x102
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#define REVISION_MIN_NVPCF 0x200
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#define REVISION_MIN_GPS 0x200
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@ -24,6 +24,7 @@ Scope (\_SB.PCI0.PEG0)
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#include "nvjt.asl"
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#include "nbci.asl"
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#include "nvpcf.asl"
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#include "gps.asl"
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Method (_DSM, 4, Serialized)
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{
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@ -55,6 +56,13 @@ Scope (\_SB.PCI0.PEG0)
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Return (NPCF (Arg2, Arg3))
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}
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}
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ElseIf (Arg0 == ToUUID (UUID_GPS))
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{
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If (ToInteger (Arg1) != REVISION_MIN_GPS)
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{
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Return (GPS (Arg2, Arg3))
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}
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}
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Return (NV_ERROR_UNSUPPORTED)
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}
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