[PATCH] platform/x86/tuxedo: Handle LampUpdateFlags in LampRangeUpdateReport

[Aaron Erhardt <aer@tuxedocomputers.com>]

According to HID Usage Tables v1.7 "Lighting And Illumination Page", the
LampUpdateComplete flag marks an update report as the last of a batch. A
device must apply all prior changes at once when it receives a report
with this flag set.

The handler for LampMultiUpdateReport already honors LampUpdateFlags,
but the handler for LampRangeUpdateReport did not. It always set
LampUpdateComplete on the final chunk, so every range update flushed the
internal color state regardless of what the host requested. This reduced
efficiency and caused unwanted intermediate states for software that
batches updates using the flag.

While splitting the update into several LampMultiUpdateReports, forward
the flags from the range report on the final chunk. Intermediate chunks
continue to carry no flags.

Fixes: cfd84b3f419b ("platform/x86/tuxedo: Add virtual LampArray for TUXEDO NB04 devices")
Cc: stable@vger.kernel.org
Signed-off-by: Aaron Erhardt <aer@tuxedocomputers.com>
---
Tested userspace software:
- OpenRGB (aac7e55114)
- lampctl (https://github.com/tuxedo-aer/lampctl 5da2aff)
---
 drivers/platform/x86/tuxedo/nb04/wmi_ab.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/tuxedo/nb04/wmi_ab.c b/drivers/platform/x86/tuxedo/nb04/wmi_ab.c
index 3e5ba524fe58..300af12e5f8a 100644
--- a/drivers/platform/x86/tuxedo/nb04/wmi_ab.c
+++ b/drivers/platform/x86/tuxedo/nb04/wmi_ab.c
@@ -724,7 +724,7 @@ static int handle_lamp_range_update_report(struct hid_device *hdev,
 		lamp_multi_update_report.lamp_update_flags =
 			i + LAMP_MULTI_UPDATE_REPORT_LAMP_COUNT_MAX >=
 			rep->lamp_id_end + 1 ?
-				LAMP_UPDATE_FLAGS_LAMP_UPDATE_COMPLETE : 0;
+				rep->lamp_update_flags : 0;
 
 		for (unsigned int j = 0; j < lamp_multi_update_report.lamp_count; ++j) {
 			lamp_multi_update_report.lamp_id[j] = i + j;

---
base-commit: c166bec9343c8b50e4c2acb78b1424c23d98841f
change-id: 20261028-nb04-fixes-6d5dab6989aa

Best regards,
--  
Aaron Erhardt <aer@tuxedocomputers.com>