[PATCH] platform/x86: panasonic-laptop: Add CF-SV1-2 platform_profile entry

[Wu Zhipeng <zepwu@foxmail.com>]

The CF-SV1-2 exposes the same CEFM/EPLE fan/TDP policy pair as the
CF-SR4, with the same boolean mapping (cool = active + locked, quiet =
passive + locked, performance = active + unlocked), so reuse
quirk_cf_sr4 and add only a DMI entry.  The remaining combination
(passive + unlocked) is reported as CUSTOM by get().

Measured on the unit (BIOS V2.00L24, i5-1145G7, EPP=performance, turbo
on, no userspace fan governor): the TDP toggle is the power lever (~10 W
locked vs ~26 W unlocked) and the fan toggle is a temperature lever at
essentially equal package power (active+locked 9.96 W / 50 C,
passive+locked 9.95 W / 60 C, active+unlocked 26.32 W / 84 C).

Notes for this model, because they do not generalise: the SEFM curve
bytes behind the boolean differ from CF-SR4 (0x00 cool / 0x05 quiet /
0x02 in S0i3), EPLE/SEPL select an IETM table PL rather than a fixed TDP
cap, _FST[1] is a fan setpoint and not RPM, a nonzero TFN1._FSL override
masks a profile change until released, and the EC boots at CEFM=0 /
EPLE=1 (active + locked / COOL).

Alex Yeo confirmed the cool/quiet/performance mapping for this model on
2026-10-26.

Link: https://lore.kernel.org/platform-driver-x86/20261025191300.1259541-1-alexyeo362@gmail.com/
Link: https://github.com/numuly/cf-sv1-2-platform-profile-evidence
Signed-off-by: Wu Zhipeng <zepwu@foxmail.com>
---
Applies on top of RFC v4 (20261025191300.1259541-1-alexyeo362@gmail.com);
the pre-image is the v4 post-image.

 drivers/platform/x86/panasonic-laptop.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c
index e929d2527fb9e04b0f9fed1abae0ed0684d9698c..69d255a0c3b07241290359bcdc7e0caf92c9804c 100644
--- a/drivers/platform/x86/panasonic-laptop.c
+++ b/drivers/platform/x86/panasonic-laptop.c
@@ -329,6 +329,14 @@ static const struct dmi_system_id pcc_profile_quirks[] = {
 		},
 		.driver_data = &quirk_cf_sr4,
 	},
+	{
+		.ident = "Panasonic Corporation CFSV1-2",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Panasonic Corporation"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "CFSV1-2"),
+		},
+		.driver_data = &quirk_cf_sr4,
+	},
 	{
 		.ident = "Panasonic Corporation CFQV9-1",
 		.matches = {
-- 
2.47.3