[PATCH v2] platform/x86: acer-wmi: Add support for Acer Nitro ANV15-51

The Acer Nitro ANV15-51 uses the Predator V4 WMI interface for thermal
profile handling and hardware monitoring, but has no quirk entry, so
these features are only available when the predator_v4 module parameter
is passed manually.

Add a quirk entry for this model.

Note that this machine does not support the turbo thermal profile: its
supported profiles bitmap (misc setting 0x0A) reads 0x53, and writing
PLATFORM_PROFILE_PERFORMANCE is rejected by the firmware. The four
remaining profiles work as expected.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Justin Vargas <[email protected]>
Tested-by: Justin Vargas <[email protected]>
---
v2: Add Assisted-by trailer per
    Documentation/process/coding-assistants.rst. No change to the code.

Tested on an Acer Nitro ANV15-51, BIOS V1.60 (04/08/2026),
kernel 7.0.11-1-cachyos:

  $ sudo dmidecode -s system-product-name
  Nitro ANV15-51

  $ sudo modprobe acer_wmi predator_v4=1
  $ cat /sys/firmware/acpi/platform_profile_choices
  low-power quiet balanced balanced-performance performance

Writing low-power, quiet, balanced and balanced-performance all succeed
and audibly change fan behaviour. Writing performance is rejected by the
firmware, consistent with the supported profiles bitmap (0x0A) reading
0x53, i.e. bit 5 (turbo) clear.

hwmon works: sensors reports acer-isa-0ace with fan1 3024 RPM,
fan2 2685 RPM, temp1 +48.0 C.

The WMI mechanism was cross-checked on Windows, where NitroSense switches
profiles via SetGamingMiscSetting with index 0x0B and the same profile
values used by this driver.

The analysis and patch were produced with AI assistance (see the
Assisted-by trailer); all testing was performed by me on the physical
machine, and I take responsibility for the patch as signed off above.

 drivers/platform/x86/acer-wmi.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index e0eaaefb13d..a7290f85166 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -662,6 +662,15 @@ static const struct dmi_system_id acer_quirks[] __initconst = {
 		},
 		.driver_data = &quirk_acer_nitro_an515_58,
 	},
+	{
+		.callback = dmi_matched,
+		.ident = "Acer Nitro ANV15-51",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Nitro ANV15-51"),
+		},
+		.driver_data = &quirk_acer_predator_v4,
+	},
 	{
 		.callback = dmi_matched,
 		.ident = "Acer Predator PH315-53",
-- 
2.47.3