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

[Justin Vargas <justinyvar@gmail.com>]

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.

Signed-off-by: Justin Vargas <justinyvar@gmail.com>
Tested-by: Justin Vargas <justinyvar@gmail.com>
---
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.

Disclosure: this patch and the analysis behind it were produced with the
assistance of an AI model (Anthropic Claude). 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