[PATCH v3 0/7] Fix PMI8994 WLED ovp values and more

[PATCH v3 0/7] Fix PMI8994 WLED ovp values and more

[Barnabás Czémán]

This patch series fixes supported ovp values related to pmi8994 wled
and set same configuration for pmi8950 wled.
It also corrects wled related properties in xiaomi-daisy, xiaomi-land and
in xiaomi-vince.

Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
Changes in v3:
- pmi8950: reword the commit to make it more clearer
- Link to v2: https://lore.kernel.org/r/20260108-pmi8950-wled-v2-0-8687f23147d7@mainlining.org

Changes in v2:
- Rework ovp change to support pmi8994 also.
- Reword commits.
- dt-bindings: Set min max for qcom,ovp-millivolt.
- Link to v1: https://lore.kernel.org/r/20260107-pmi8950-wled-v1-0-5e52f5caa39c@mainlining.org

---
Barnabás Czémán (7):
      dt-bindings: backlight: qcom-wled: Document ovp values for PMI8994
      backlight: qcom-wled: Support ovp values for PMI8994
      dt-bindings: backlight: qcom-wled: Document ovp values for PMI8950
      backlight: qcom-wled: Change PM8950 WLED configurations
      arm64: dts: qcom: msm8953-xiaomi-vince: correct wled ovp value
      arm64: dts: qcom: msm8937-xiaomi-land: correct wled ovp value
      arm64: dts: qcom: msm8953-xiaomi-daisy: fix backlight

 .../bindings/leds/backlight/qcom-wled.yaml         | 24 +++++++++++--
 arch/arm64/boot/dts/qcom/msm8937-xiaomi-land.dts   |  2 +-
 arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts  |  2 +-
 arch/arm64/boot/dts/qcom/msm8953-xiaomi-vince.dts  |  2 +-
 drivers/video/backlight/qcom-wled.c                | 42 ++++++++++++++++++++--
 5 files changed, 65 insertions(+), 7 deletions(-)
---
base-commit: f96074c6d01d8a5e9e2fccd0bba5f2ed654c1f2d
change-id: 20260107-pmi8950-wled-b014578f67a6

Best regards,
-- 
Barnabás Czémán <barnabas.czeman@mainlining.org>

[PATCH v3 1/7] dt-bindings: backlight: qcom-wled: Document ovp values for PMI8994

[Barnabás Czémán]

Document ovp values supported by wled found in PMI8994.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 .../bindings/leds/backlight/qcom-wled.yaml         | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
index a8490781011d..19166186a1ff 100644
--- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
+++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
@@ -98,8 +98,8 @@ properties:
     description: |
       Over-voltage protection limit. This property is for WLED4 only.
     $ref: /schemas/types.yaml#/definitions/uint32
-    enum: [ 18100, 19600, 29600, 31100 ]
-    default: 29600
+    minimum: 17800
+    maximum: 31100
 
   qcom,num-strings:
     description: |
@@ -239,6 +239,24 @@ allOf:
           minimum: 0
           maximum: 4095
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,pmi8994-wled
+
+    then:
+      properties:
+        qcom,ovp-millivolt:
+          enum: [ 17800, 19400, 29500, 31000 ]
+          default: 29500
+
+    else:
+      properties:
+        qcom,ovp-millivolt:
+          enum: [ 18100, 19600, 29600, 31100 ]
+          default: 29600
+
 required:
   - compatible
   - reg

-- 
2.52.0

Re: [PATCH v3 1/7] dt-bindings: backlight: qcom-wled: Document ovp values for PMI8994

[Daniel Thompson]

On Fri, Jan 16, 2026 at 08:07:33AM +0100, Barnabás Czémán wrote:
> Document ovp values supported by wled found in PMI8994.
>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>

Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>


Thanks

Daniel

[PATCH v3 2/7] backlight: qcom-wled: Support ovp values for PMI8994

[Barnabás Czémán]

WLED4 found in PMI8994 supports different ovp values.

Fixes: 6fc632d3e3e0 ("video: backlight: qcom-wled: Add PMI8994 compatible")
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 drivers/video/backlight/qcom-wled.c | 41 +++++++++++++++++++++++++++++++++++--
 1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
index a63bb42c8f8b..5decbd39b789 100644
--- a/drivers/video/backlight/qcom-wled.c
+++ b/drivers/video/backlight/qcom-wled.c
@@ -1244,6 +1244,15 @@ static const struct wled_var_cfg wled4_ovp_cfg = {
 	.size = ARRAY_SIZE(wled4_ovp_values),
 };
 
+static const u32 pmi8994_wled_ovp_values[] = {
+	31000, 29500, 19400, 17800,
+};
+
+static const struct wled_var_cfg pmi8994_wled_ovp_cfg = {
+	.values = pmi8994_wled_ovp_values,
+	.size = ARRAY_SIZE(pmi8994_wled_ovp_values),
+};
+
 static inline u32 wled5_ovp_values_fn(u32 idx)
 {
 	/*
@@ -1357,6 +1366,29 @@ static int wled_configure(struct wled *wled)
 		},
 	};
 
+	const struct wled_u32_opts pmi8994_wled_opts[] = {
+		{
+			.name = "qcom,current-boost-limit",
+			.val_ptr = &cfg->boost_i_limit,
+			.cfg = &wled4_boost_i_limit_cfg,
+		},
+		{
+			.name = "qcom,current-limit-microamp",
+			.val_ptr = &cfg->string_i_limit,
+			.cfg = &wled4_string_i_limit_cfg,
+		},
+		{
+			.name = "qcom,ovp-millivolt",
+			.val_ptr = &cfg->ovp,
+			.cfg = &pmi8994_wled_ovp_cfg,
+		},
+		{
+			.name = "qcom,switching-freq",
+			.val_ptr = &cfg->switch_freq,
+			.cfg = &wled3_switch_freq_cfg,
+		},
+	};
+
 	const struct wled_u32_opts wled5_opts[] = {
 		{
 			.name = "qcom,current-boost-limit",
@@ -1423,8 +1455,13 @@ static int wled_configure(struct wled *wled)
 		break;
 
 	case 4:
-		u32_opts = wled4_opts;
-		size = ARRAY_SIZE(wled4_opts);
+		if (of_device_is_compatible(dev->of_node, "qcom,pmi8994-wled")) {
+			u32_opts = pmi8994_wled_opts;
+			size = ARRAY_SIZE(pmi8994_wled_opts);
+		} else {
+			u32_opts = wled4_opts;
+			size = ARRAY_SIZE(wled4_opts);
+		}
 		*cfg = wled4_config_defaults;
 		wled->wled_set_brightness = wled4_set_brightness;
 		wled->wled_sync_toggle = wled3_sync_toggle;

-- 
2.52.0

Re: [PATCH v3 2/7] backlight: qcom-wled: Support ovp values for PMI8994

[Daniel Thompson]

On Fri, Jan 16, 2026 at 08:07:34AM +0100, Barnabás Czémán wrote:
> WLED4 found in PMI8994 supports different ovp values.
>
> Fixes: 6fc632d3e3e0 ("video: backlight: qcom-wled: Add PMI8994 compatible")
> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
> Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>

Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>


Thanks

Daniel

[PATCH v3 3/7] dt-bindings: backlight: qcom-wled: Document ovp values for PMI8950

[Barnabás Czémán]

Document ovp values supported by wled found in PMI8950.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
index 19166186a1ff..a54448cfdb38 100644
--- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
+++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
@@ -243,7 +243,9 @@ allOf:
       properties:
         compatible:
           contains:
-            const: qcom,pmi8994-wled
+            enum:
+              - qcom,pmi8950-wled
+              - qcom,pmi8994-wled
 
     then:
       properties:

-- 
2.52.0

Re: [PATCH v3 3/7] dt-bindings: backlight: qcom-wled: Document ovp values for PMI8950

[Daniel Thompson]

On Fri, Jan 16, 2026 at 08:07:35AM +0100, Barnabás Czémán wrote:
> Document ovp values supported by wled found in PMI8950.
>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>

Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>


Thanks

Daniel

[PATCH v3 4/7] backlight: qcom-wled: Change PM8950 WLED configurations

[Barnabás Czémán]

PMI8950 WLED needs same configurations as PMI8994 WLED.

Fixes: 10258bf4534b ("backlight: qcom-wled: Add PMI8950 compatible")
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 drivers/video/backlight/qcom-wled.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
index 5decbd39b789..8054e4787725 100644
--- a/drivers/video/backlight/qcom-wled.c
+++ b/drivers/video/backlight/qcom-wled.c
@@ -1455,7 +1455,8 @@ static int wled_configure(struct wled *wled)
 		break;
 
 	case 4:
-		if (of_device_is_compatible(dev->of_node, "qcom,pmi8994-wled")) {
+		if (of_device_is_compatible(dev->of_node, "qcom,pmi8950-wled") ||
+		    of_device_is_compatible(dev->of_node, "qcom,pmi8994-wled")) {
 			u32_opts = pmi8994_wled_opts;
 			size = ARRAY_SIZE(pmi8994_wled_opts);
 		} else {

-- 
2.52.0

Re: [PATCH v3 4/7] backlight: qcom-wled: Change PM8950 WLED configurations

[Daniel Thompson]

On Fri, Jan 16, 2026 at 08:07:36AM +0100, Barnabás Czémán wrote:
> PMI8950 WLED needs same configurations as PMI8994 WLED.
>
> Fixes: 10258bf4534b ("backlight: qcom-wled: Add PMI8950 compatible")
> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
> Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
> ---
>  drivers/video/backlight/qcom-wled.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
> index 5decbd39b789..8054e4787725 100644
> --- a/drivers/video/backlight/qcom-wled.c
> +++ b/drivers/video/backlight/qcom-wled.c
> @@ -1455,7 +1455,8 @@ static int wled_configure(struct wled *wled)
>  		break;
>
>  	case 4:
> -		if (of_device_is_compatible(dev->of_node, "qcom,pmi8994-wled")) {
> +		if (of_device_is_compatible(dev->of_node, "qcom,pmi8950-wled") ||
> +		    of_device_is_compatible(dev->of_node, "qcom,pmi8994-wled")) {
>  			u32_opts = pmi8994_wled_opts;

I still really dislike naming the structures after a single instance of
the PMIC when, at inception, that name is known to be wrong. However
if the Qualcomm devs are happy with it then I guess I can live with it.

Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>


Thanks

Daniel.

[PATCH v3 5/7] arm64: dts: qcom: msm8953-xiaomi-vince: correct wled ovp value

[Barnabás Czémán]

PMI8950 doesn't actually support setting an OVP threshold value of
29.6 V. The closest allowed value is 29.5 V. Set that instead.

Fixes: aa17e707e04a ("arm64: dts: qcom: msm8953: Add device tree for Xiaomi Redmi 5 Plus")
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 arch/arm64/boot/dts/qcom/msm8953-xiaomi-vince.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/msm8953-xiaomi-vince.dts b/arch/arm64/boot/dts/qcom/msm8953-xiaomi-vince.dts
index d46325e79917..c2a290bf493c 100644
--- a/arch/arm64/boot/dts/qcom/msm8953-xiaomi-vince.dts
+++ b/arch/arm64/boot/dts/qcom/msm8953-xiaomi-vince.dts
@@ -169,7 +169,7 @@ &pm8953_resin {
 
 &pmi8950_wled {
 	qcom,current-limit-microamp = <20000>;
-	qcom,ovp-millivolt = <29600>;
+	qcom,ovp-millivolt = <29500>;
 	qcom,num-strings = <2>;
 	qcom,external-pfet;
 	qcom,cabc;

-- 
2.52.0

[PATCH v3 6/7] arm64: dts: qcom: msm8937-xiaomi-land: correct wled ovp value

[Barnabás Czémán]

PMI8950 doesn't actually support setting an OVP threshold value of
29.6 V. The closest allowed value is 29.5 V. Set that instead.

Fixes: 2144f6d57d8e ("arm64: dts: qcom: Add Xiaomi Redmi 3S")
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 arch/arm64/boot/dts/qcom/msm8937-xiaomi-land.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/msm8937-xiaomi-land.dts b/arch/arm64/boot/dts/qcom/msm8937-xiaomi-land.dts
index 91837ff940f1..4f301e7c6517 100644
--- a/arch/arm64/boot/dts/qcom/msm8937-xiaomi-land.dts
+++ b/arch/arm64/boot/dts/qcom/msm8937-xiaomi-land.dts
@@ -178,7 +178,7 @@ &pmi8950_wled {
 	qcom,num-strings = <2>;
 	qcom,external-pfet;
 	qcom,current-limit-microamp = <20000>;
-	qcom,ovp-millivolt = <29600>;
+	qcom,ovp-millivolt = <29500>;
 
 	status = "okay";
 };

-- 
2.52.0

Re: [PATCH v3 6/7] arm64: dts: qcom: msm8937-xiaomi-land: correct wled ovp value

[Konrad Dybcio]

On 1/16/26 8:07 AM, Barnabás Czémán wrote:
> PMI8950 doesn't actually support setting an OVP threshold value of
> 29.6 V. The closest allowed value is 29.5 V. Set that instead.
> 
> Fixes: 2144f6d57d8e ("arm64: dts: qcom: Add Xiaomi Redmi 3S")
> Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

[PATCH v3 7/7] arm64: dts: qcom: msm8953-xiaomi-daisy: fix backlight

[Barnabás Czémán]

The backlight on this device is connected via 3 strings. Currently,
the DT claims only two are present, which results in visible stripes
on the display (since every third backlight string remains unconfigured).

Fix the number of strings to avoid that.

Fixes: 38d779c26395 ("arm64: dts: qcom: msm8953: Add device tree for Xiaomi Mi A2 Lite")
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts b/arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts
index ddd7af616794..59f873a06e4d 100644
--- a/arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts
+++ b/arch/arm64/boot/dts/qcom/msm8953-xiaomi-daisy.dts
@@ -157,7 +157,7 @@ &pm8953_resin {
 
 &pmi8950_wled {
 	qcom,current-limit-microamp = <20000>;
-	qcom,num-strings = <2>;
+	qcom,num-strings = <3>;
 
 	status = "okay";
 };

-- 
2.52.0

Re: [PATCH v3 7/7] arm64: dts: qcom: msm8953-xiaomi-daisy: fix backlight

[Konrad Dybcio]

On 1/16/26 8:07 AM, Barnabás Czémán wrote:
> The backlight on this device is connected via 3 strings. Currently,
> the DT claims only two are present, which results in visible stripes
> on the display (since every third backlight string remains unconfigured).
> 
> Fix the number of strings to avoid that.
> 
> Fixes: 38d779c26395 ("arm64: dts: qcom: msm8953: Add device tree for Xiaomi Mi A2 Lite")
> Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: (subset) [PATCH v3 0/7] Fix PMI8994 WLED ovp values and more

[Lee Jones]

On Fri, 16 Jan 2026 08:07:32 +0100, Barnabás Czémán wrote:
> This patch series fixes supported ovp values related to pmi8994 wled
> and set same configuration for pmi8950 wled.
> It also corrects wled related properties in xiaomi-daisy, xiaomi-land and
> in xiaomi-vince.
> 
> 

Applied, thanks!

[1/7] dt-bindings: backlight: qcom-wled: Document ovp values for PMI8994
      commit: 02031064bb8f387d81988a8abb211f1366d87582
[2/7] backlight: qcom-wled: Support ovp values for PMI8994
      commit: f29f972a6e7e3f187ea4d89b98a76c1981ca4d53
[3/7] dt-bindings: backlight: qcom-wled: Document ovp values for PMI8950
      commit: b2df6cf10d5242bfef2cc957d83738ccb560ed9f
[4/7] backlight: qcom-wled: Change PM8950 WLED configurations
      commit: 83333aa97441ba7ce32b91e8a007c72d316a1c67

--
Lee Jones [李琼斯]

Re: (subset) [PATCH v3 0/7] Fix PMI8994 WLED ovp values and more

[Bjorn Andersson]

On Fri, 16 Jan 2026 08:07:32 +0100, Barnabás Czémán wrote:
> This patch series fixes supported ovp values related to pmi8994 wled
> and set same configuration for pmi8950 wled.
> It also corrects wled related properties in xiaomi-daisy, xiaomi-land and
> in xiaomi-vince.
> 
> 

Applied, thanks!

[5/7] arm64: dts: qcom: msm8953-xiaomi-vince: correct wled ovp value
      commit: 9e87f0eaadccc3fecdf3c3c0334e05694804b5f5
[6/7] arm64: dts: qcom: msm8937-xiaomi-land: correct wled ovp value
      commit: 9bc4b18a425e8cf1bca190a136a11c3be516f513
[7/7] arm64: dts: qcom: msm8953-xiaomi-daisy: fix backlight
      commit: 7131f6d909a6546329b71f2bacfdc60cb3e6020e

Best regards,
-- 
Bjorn Andersson <andersson@kernel.org>