[PATCH v4 0/4] Add framebuffer on Xiaomi Poco F1 and disable the MDSS on tianma panel variant

[PATCH v4 0/4] Add framebuffer on Xiaomi Poco F1 and disable the MDSS on tianma panel variant

[David Heidelberg via B4 Relay]

Enable framebuffer for early console output.

Due to broken panel driver on tianma and no visual output it's better
to disable the MDSS so the framebuffer stays on. 

In case second patch gets rejected, please apply the first one standalone

Signed-off-by: Petr Hodina <petr.hodina@protonmail.com>
---
Changes in v4:
- Stripped too many labels, OnePlus 6 does use the label in the OP6/OP6T
  variants. Re-add.
- Link to v3: https://lore.kernel.org/r/20260401-beryllium-fb-v3-0-ec7d443402ab@ixit.cz

Changes in v3:
- Strip label from framebuffer nodes where unused and remove -0 postfix. (Konrad)
- Link to v2: https://lore.kernel.org/r/20260317-beryllium-fb-v2-0-36b69dfb760c@ixit.cz

Changes in v2:
- Added few conversion to use memory-region.
- Corrected framebuffer node name. (Konrad)
- Link to v1: https://lore.kernel.org/r/20260311-beryllium-fb-v1-0-408a580d125e@ixit.cz

---
David Heidelberg (3):
      arm64: dts: qcom: sdm845-oneplus: Drop address from framebuffer node
      arm64: dts: qcom: sdm845-shift-axolotl: Convert fb to use memory-region
      arm64: dts: qcom: sdm845-samsung-starqltechn: Convert fb to use memory-region

Petr Hodina (1):
      arm64: dts: qcom: sdm845-xiaomi-beryllium: Introduce framebuffer

 arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi      |  2 +-
 arch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts  |  7 ++++---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts        |  8 ++++----
 .../boot/dts/qcom/sdm845-xiaomi-beryllium-common.dtsi    | 16 ++++++++++++++++
 4 files changed, 25 insertions(+), 8 deletions(-)
---
base-commit: bd0f139e5fc11182777b81cefc3893ea508544ec
change-id: 20260107-beryllium-fb-d3e87bc20be0

Best regards,
-- 
David Heidelberg <david@ixit.cz>

[PATCH v4 1/4] arm64: dts: qcom: sdm845-xiaomi-beryllium: Introduce framebuffer

[David Heidelberg via B4 Relay]

From: Petr Hodina <petr.hodina@protonmail.com>

Add framebuffer for early console and u-boot support.

Signed-off-by: Petr Hodina <petr.hodina@protonmail.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 .../boot/dts/qcom/sdm845-xiaomi-beryllium-common.dtsi    | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-common.dtsi
index 1298485c42142..a6ee3dd171def 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-common.dtsi
@@ -39,6 +39,22 @@ aliases {
 		serial1 = &uart6;
 	};
 
+	chosen {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		framebuffer {
+			compatible = "simple-framebuffer";
+			memory-region = <&cont_splash_mem>;
+
+			format = "a8r8g8b8";
+			stride = <(1080 * 4)>;
+			height = <2246>;
+			width = <1080>;
+		};
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 		autorepeat;

-- 
2.53.0

Re: [PATCH v4 1/4] arm64: dts: qcom: sdm845-xiaomi-beryllium: Introduce framebuffer

[Konrad Dybcio]

On 4/2/26 12:39 AM, David Heidelberg via B4 Relay wrote:
> From: Petr Hodina <petr.hodina@protonmail.com>
> 
> Add framebuffer for early console and u-boot support.
> 
> Signed-off-by: Petr Hodina <petr.hodina@protonmail.com>
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---

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

Konrad

[PATCH v4 2/4] arm64: dts: qcom: sdm845-oneplus: Drop address from framebuffer node

[David Heidelberg via B4 Relay]

From: David Heidelberg <david@ixit.cz>

This node has no 'reg' property, so it shouldn't have a unit address
(after '@') either

Fixes: b0d5c96e860c ("arm64: dts: qcom: sdm845-oneplus: Add framebuffer")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
index 6b7378cf4d493..b0b9baf01ec29 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
@@ -72,7 +72,7 @@ chosen {
 
 		stdout-path = "serial0:115200n8";
 
-		framebuffer: framebuffer@9d400000 {
+		framebuffer: framebuffer {
 			compatible = "simple-framebuffer";
 			memory-region = <&cont_splash_mem>;
 

-- 
2.53.0

[PATCH v4 3/4] arm64: dts: qcom: sdm845-shift-axolotl: Convert fb to use memory-region

[David Heidelberg via B4 Relay]

From: David Heidelberg <david@ixit.cz>

Instead of manually specifying reg, reuse the memory region.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index 740eb22550724..88d970268e282 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -23,7 +23,7 @@ / {
 	qcom,board-id = <11 0>;
 
 	aliases {
-		display0 = &framebuffer0;
+		display0 = &framebuffer;
 		serial0 = &uart9;
 		serial1 = &uart6;
 	};
@@ -36,9 +36,9 @@ chosen {
 		stdout-path = "serial0";
 
 		/* Use framebuffer setup by the bootloader. */
-		framebuffer0: framebuffer@9d400000 {
+		framebuffer: framebuffer {
 			compatible = "simple-framebuffer";
-			reg = <0x0 0x9d400000 0x0 (1080 * 2160 * 4)>;
+			memory-region = <&framebuffer_mem>;
 			width = <1080>;
 			height = <2160>;
 			stride = <(1080 * 4)>;
@@ -62,7 +62,7 @@ key-vol-up {
 	};
 
 	reserved-memory {
-		framebuffer@9d400000 {
+		framebuffer_mem: framebuffer@9d400000 {
 			reg = <0x0 0x9d400000 0x0 (1080 * 2160 * 4)>;
 			no-map;
 		};

-- 
2.53.0

[PATCH v4 4/4] arm64: dts: qcom: sdm845-samsung-starqltechn: Convert fb to use memory-region

[David Heidelberg via B4 Relay]

From: David Heidelberg <david@ixit.cz>

Instead of manually specifying reg, reuse the memory region.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts b/arch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts
index 77f5872de6f19..0d915ecb0444f 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts
@@ -43,9 +43,10 @@ chosen {
 		#address-cells = <2>;
 		#size-cells = <2>;
 		ranges;
-		framebuffer: framebuffer@9d400000 {
+
+		framebuffer {
 			compatible = "simple-framebuffer";
-			reg = <0 0x9d400000 0 (2960 * 1440 * 4)>;//2400000
+			memory-region = <&framebuffer_mem>;
 			width = <1440>;
 			height = <2960>;
 			stride = <(1440 * 4)>;
@@ -109,7 +110,7 @@ vreg_s4a_1p8: pm8998-smps4 {
 	};
 
 	reserved-memory {
-		memory@9d400000 {
+		framebuffer_mem: memory@9d400000 {
 			reg = <0x0 0x9d400000 0x0 0x02400000>;
 			no-map;
 		};

-- 
2.53.0

Re: [PATCH v4 0/4] Add framebuffer on Xiaomi Poco F1 and disable the MDSS on tianma panel variant

[Bjorn Andersson]

On Thu, 02 Apr 2026 00:39:34 +0200, David Heidelberg wrote:
> Enable framebuffer for early console output.
> 
> Due to broken panel driver on tianma and no visual output it's better
> to disable the MDSS so the framebuffer stays on.
> 
> In case second patch gets rejected, please apply the first one standalone
> 
> [...]

Applied, thanks!

[1/4] arm64: dts: qcom: sdm845-xiaomi-beryllium: Introduce framebuffer
      commit: a4f6959661f0c8542e5a89aaaef27fc4ac9408a6
[2/4] arm64: dts: qcom: sdm845-oneplus: Drop address from framebuffer node
      commit: b379bb1470d864659ae9522b72f241a15255dce6
[3/4] arm64: dts: qcom: sdm845-shift-axolotl: Convert fb to use memory-region
      commit: 15520f868651d6b03c603918bade78f4799df7ca
[4/4] arm64: dts: qcom: sdm845-samsung-starqltechn: Convert fb to use memory-region
      commit: 2eae029f7d38c5fc03a778f483b5079d0e355472

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