backlight: qcom-wled: Use sink_addr for sync toggle

stable inclusion
from stable-5.10.36
commit 918a45b65365749f279cf2955d73d86ef25831a0
bugzilla: 51867
CVE: NA

--------------------------------

[ Upstream commit cdfd4c68 ]

WLED3_SINK_REG_SYNC is, as the name implies, a sink register offset.
Therefore, use the sink address as base instead of the ctrl address.

This fixes the sync toggle on wled4, which can be observed by the fact
that adjusting brightness now works.

It has no effect on wled3 because sink and ctrl base addresses are the
same.  This allows adjusting the brightness without having to disable
then reenable the module.
Signed-off-by: NObeida Shamoun <oshmoun100@googlemail.com>
Signed-off-by: NKonrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: NMarijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: NDaniel Thompson <daniel.thompson@linaro.org>
Acked-by: NKiran Gunda <kgunda@codeaurora.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/video/backlight/qcom-wled.c

@@ -336,13 +336,13 @@ static int wled3_sync_toggle(struct wled *wled)
 	unsigned int mask = GENMASK(wled->max_string_count - 1, 0);
 
 	rc = regmap_update_bits(wled->regmap,
-				wled->ctrl_addr + WLED3_SINK_REG_SYNC,
+				wled->sink_addr + WLED3_SINK_REG_SYNC,
 				mask, mask);
 	if (rc < 0)
 		return rc;
 
 	rc = regmap_update_bits(wled->regmap,
-				wled->ctrl_addr + WLED3_SINK_REG_SYNC,
+				wled->sink_addr + WLED3_SINK_REG_SYNC,
 				mask, WLED3_SINK_REG_SYNC_CLEAR);
 
 	return rc;