The GPU SRAM supply is supposed to be always at least 0.1V higher than
the GPU supply. However when the DT was upstreamed, the spread was
incorrectly set to 0.01V.

Fixes: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool")
Cc: <stable@vger.kernel.org>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
Noticed this while trying to align the downstream Mali driver to the
upstream device tree and binding.

 arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
index cf288fe7a238..db2aca079349 100644
--- a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
@@ -1352,7 +1352,7 @@ mt6366_vgpu_reg: vgpu {
 				regulator-allowed-modes = <MT6397_BUCK_MODE_AUTO
 							   MT6397_BUCK_MODE_FORCE_PWM>;
 				regulator-coupled-with = <&mt6366_vsram_gpu_reg>;
-				regulator-coupled-max-spread = <10000>;
+				regulator-coupled-max-spread = <100000>;
 			};
 
 			mt6366_vproc11_reg: vproc11 {
@@ -1561,7 +1561,7 @@ mt6366_vsram_gpu_reg: vsram-gpu {
 				regulator-ramp-delay = <6250>;
 				regulator-enable-ramp-delay = <240>;
 				regulator-coupled-with = <&mt6366_vgpu_reg>;
-				regulator-coupled-max-spread = <10000>;
+				regulator-coupled-max-spread = <100000>;
 			};
 
 			mt6366_vsram_others_reg: vsram-others {
-- 
2.47.0.rc1.288.g06298d1525-goog

On Mon, 21 Oct 2024 22:05:36 +0800, Chen-Yu Tsai wrote:
> The GPU SRAM supply is supposed to be always at least 0.1V higher than
> the GPU supply. However when the DT was upstreamed, the spread was
> incorrectly set to 0.01V.
> 
> 

Applied to v6.12-next/dts64, thanks!

[1/1] arm64: dts: mediatek: mt8186-corsola: Fix GPU supply coupling max-spread
      commit: 2f1aab0cb0661d533f008e4975325080351cdfc8

Cheers,
Angelo

Il 21/10/24 16:05, Chen-Yu Tsai ha scritto:
> The GPU SRAM supply is supposed to be always at least 0.1V higher than
> the GPU supply. However when the DT was upstreamed, the spread was
> incorrectly set to 0.01V.
> 
> Fixes: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool")
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>