[PATCH] arm64: dts: mediatek: mt8192-asurada: Move PCIe DMA bounce buffer to host

[PATCH] arm64: dts: mediatek: mt8192-asurada: Move PCIe DMA bounce buffer to host

[Chen-Yu Tsai]

The DMA bounce buffer is attached to the PCIe host controller, i.e. all
PCIe DMA transfers should use it.

Move it from the PCIe (WiFi) device node down to the PCIe host
controller node.

Fixes: 0dca9f0b3e63 ("arm64: dts: mediatek: asurada: Enable PCIe and add WiFi")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
 arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index 217c9bd5e9a1..eebcc4068e28 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -645,6 +645,7 @@ flash@0 {
 &pcie {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie_pins>;
+	memory-region = <&wifi_restricted_dma_region>;
 
 	pcie0: pcie@0,0 {
 		device_type = "pci";
@@ -659,7 +660,6 @@ pcie0: pcie@0,0 {
 		wifi: wifi@0,0 {
 			reg = <0x10000 0 0 0 0x100000>,
 			      <0x10000 0 0x100000 0 0x100000>;
-			memory-region = <&wifi_restricted_dma_region>;
 		};
 	};
 };
-- 
2.54.0.545.g6539524ca2-goog

Re: [PATCH] arm64: dts: mediatek: mt8192-asurada: Move PCIe DMA bounce buffer to host

[kernel test robot]

:::::: 
:::::: Manual check reason: "dtcheck: binding changes may go via different trees"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <20260430120725.241779-1-wenst@chromium.org>
References: <20260430120725.241779-1-wenst@chromium.org>
TO: "Chen-Yu Tsai" <wenst@chromium.org>
TO: Matthias Brugger <matthias.bgg@gmail.com>
TO: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
CC: "Chen-Yu Tsai" <wenst@chromium.org>
CC: linux-mediatek@lists.infradead.org
CC: devicetree@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-kernel@vger.kernel.org

Hi Chen-Yu,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v6.16-rc1 next-20260430]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Chen-Yu-Tsai/arm64-dts-mediatek-mt8192-asurada-Move-PCIe-DMA-bounce-buffer-to-host/20260503-093251
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20260430120725.241779-1-wenst%40chromium.org
patch subject: [PATCH] arm64: dts: mediatek: mt8192-asurada: Move PCIe DMA bounce buffer to host
:::::: branch date: 18 hours ago
:::::: commit date: 18 hours ago
config: arm64-randconfig-2052-20260503 (https://download.01.org/0day-ci/archive/20260503/202605032134.1IrhSdOn-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.1.0
dtschema: 2026.5.dev4+g4ccc1997d
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260503/202605032134.1IrhSdOn-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202605032134.1IrhSdOn-lkp@intel.com/

dtcheck warnings: (new ones prefixed by >>)
   arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dtb: pmic (mediatek,mt6359): '#sound-dai-cells' does not match any of the regexes: '^pinctrl-[0-9]+$'
   	from schema $id: http://devicetree.org/schemas/mfd/mediatek,mt6397.yaml
>> arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dtb: pcie@11230000 (mediatek,mt8192-pcie): Unevaluated properties are not allowed ('memory-region' was unexpected)
   	from schema $id: http://devicetree.org/schemas/pci/mediatek-pcie-gen3.yaml
   arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dtb: pcie@0,0: wifi@0,0:reg:0:4: 0 was expected
   	from schema $id: http://devicetree.org/schemas/pci/pci-bus-common.yaml
   arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dtb: pcie@0,0: wifi@0,0:reg: [[65536, 0, 0, 0, 1048576], [65536, 0, 1048576, 0, 1048576]] is too long
   	from schema $id: http://devicetree.org/schemas/pci/pci-bus-common.yaml
   arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dtb: flash@0 (winbond,w25q64jwm): compatible: 'oneOf' conditional failed, one must be fixed:
   	['winbond,w25q64jwm', 'jedec,spi-nor'] is too long
   	'winbond,w25q64jwm' does not match '^((((micron|spansion|st),)?(m25p(40|80|16|32|64|128)|n25q(32b|064|128a11|128a13|256a|512a|164k)))|atmel,at(25|26)df(321a|641|081a)|everspin,mr25h(10|40|128|256)|(mxicy|macronix),mx25l(4005a|1606e|6405d|8005|12805d|25635e)|(mxicy|macronix),mx25u(4033|4035)|(spansion,)?s25fl(128s|256s1|512s|008k|064k|164k)|(sst|microchip),sst25vf(016b|032b|040b)|(sst,)?sst26wf016b|(sst,)?sst25wf(040b|080)|winbond,w25x(80|32)|(winbond,)?w25q(16|32(w|dw)?|64(dw)?|80bl|128(fw)?|256))$'
   	'winbond,w25q64jwm' is not one of ['issi,is25lp016d', 'micron,mt25qu02g', 'mxicy,mx25r1635f', 'mxicy,mx25u6435f', 'mxicy,mx25v8035f', 'spansion,s25sl12801', 'spansion,s25fs512s']
   	'jedec,spi-nor' was expected
--
   arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dtb: pmic (mediatek,mt6359): '#sound-dai-cells' does not match any of the regexes: '^pinctrl-[0-9]+$'
   	from schema $id: http://devicetree.org/schemas/mfd/mediatek,mt6397.yaml
>> arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dtb: pcie@11230000 (mediatek,mt8192-pcie): Unevaluated properties are not allowed ('memory-region' was unexpected)
   	from schema $id: http://devicetree.org/schemas/pci/mediatek-pcie-gen3.yaml
   arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dtb: pcie@0,0: wifi@0,0:reg:0:4: 0 was expected
   	from schema $id: http://devicetree.org/schemas/pci/pci-bus-common.yaml
   arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dtb: pcie@0,0: wifi@0,0:reg: [[65536, 0, 0, 0, 1048576], [65536, 0, 1048576, 0, 1048576]] is too long
   	from schema $id: http://devicetree.org/schemas/pci/pci-bus-common.yaml
   arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dtb: flash@0 (winbond,w25q64jwm): compatible: 'oneOf' conditional failed, one must be fixed:
   	['winbond,w25q64jwm', 'jedec,spi-nor'] is too long
   	'winbond,w25q64jwm' does not match '^((((micron|spansion|st),)?(m25p(40|80|16|32|64|128)|n25q(32b|064|128a11|128a13|256a|512a|164k)))|atmel,at(25|26)df(321a|641|081a)|everspin,mr25h(10|40|128|256)|(mxicy|macronix),mx25l(4005a|1606e|6405d|8005|12805d|25635e)|(mxicy|macronix),mx25u(4033|4035)|(spansion,)?s25fl(128s|256s1|512s|008k|064k|164k)|(sst|microchip),sst25vf(016b|032b|040b)|(sst,)?sst26wf016b|(sst,)?sst25wf(040b|080)|winbond,w25x(80|32)|(winbond,)?w25q(16|32(w|dw)?|64(dw)?|80bl|128(fw)?|256))$'
   	'winbond,w25q64jwm' is not one of ['issi,is25lp016d', 'micron,mt25qu02g', 'mxicy,mx25r1635f', 'mxicy,mx25u6435f', 'mxicy,mx25v8035f', 'spansion,s25sl12801', 'spansion,s25fs512s']
   	'jedec,spi-nor' was expected

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH] arm64: dts: mediatek: mt8192-asurada: Move PCIe DMA bounce buffer to host

[AngeloGioacchino Del Regno]

On Thu, 30 Apr 2026 20:07:24 +0800, Chen-Yu Tsai wrote:
> The DMA bounce buffer is attached to the PCIe host controller, i.e. all
> PCIe DMA transfers should use it.
> 
> Move it from the PCIe (WiFi) device node down to the PCIe host
> controller node.
> 
> 
> [...]

Applied to v7.1-next/dts64, thanks!

[1/1] arm64: dts: mediatek: mt8192-asurada: Move PCIe DMA bounce buffer to host
      commit: 0f91911b61d06fc02a058ff7fb0a27e53f7b1136

Cheers,
Angelo

Re: [PATCH] arm64: dts: mediatek: mt8192-asurada: Move PCIe DMA bounce buffer to host

[Chen-Yu Tsai]

On Mon, May 11, 2026 at 5:36 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com> wrote:
>
> On Thu, 30 Apr 2026 20:07:24 +0800, Chen-Yu Tsai wrote:
> > The DMA bounce buffer is attached to the PCIe host controller, i.e. all
> > PCIe DMA transfers should use it.
> >
> > Move it from the PCIe (WiFi) device node down to the PCIe host
> > controller node.
> >
> >
> > [...]
>
> Applied to v7.1-next/dts64, thanks!
>
> [1/1] arm64: dts: mediatek: mt8192-asurada: Move PCIe DMA bounce buffer to host
>       commit: 0f91911b61d06fc02a058ff7fb0a27e53f7b1136

Sorry, but we actually have to wait for a matching binding change [1] to
land, or we'll get new DT warnings.


ChenYu

[1] https://lore.kernel.org/all/20260508063633.3894348-1-wenst@chromium.org/