[PATCH v2] arm64: dts: amlogic: Fix SDIO interrupt and make it level-sensitive

[Peter Suti]

On Wed, Jan 25, 2023 at 8:00 AM Heiner Kallweit <hkallweit1 at gmail.com> wrote:
>
> SDIO specification defines that the interrupt is level-sensitive.
> Fix the interrupt trigger type for emmc_a accordingly.
> See comment at beginning of the file wrt which is the SDIO port.
> mmc2 = &sd_emmc_a; /* SDIO */
>
> The usage of edge-triggered interrupts lead to lost interrupts under load,
> see [0]. This was confirmed to be fixed by using level-triggered
> interrupts.
>
> Note:
> SDIO interrupt support was added in Linux just recently, however other
> users of this dts may be affected too.
>
> [0] https://www.spinics.net/lists/linux-mmc/msg73991.html
>
> Fixes: 1499218c80c9 ("arm64: dts: move common G12A & G12B modes to meson-g12-common.dtsi")
> Reported-by: Peter Suti <peter.suti at streamunlimited.com>
> Tested-by: Peter Suti <peter.suti at streamunlimited.com>
> Cc: stable at vger.kernel.org
> Signed-off-by: Heiner Kallweit <hkallweit1 at gmail.com>
> ---
> v2:
> - rebase considering recent node name change sd -> mmc for sd_emmc_a
> ---
>  arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi | 2 +-
>  arch/arm64/boot/dts/amlogic/meson-gx.dtsi         | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> index 1a931d5c2..c09eb9f6f 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
> @@ -2324,7 +2324,7 @@ uart_A: serial at 24000 {
>                 sd_emmc_a: mmc at ffe03000 {
>                         compatible = "amlogic,meson-axg-mmc";
>                         reg = <0x0 0xffe03000 0x0 0x800>;
> -                       interrupts = <GIC_SPI 189 IRQ_TYPE_EDGE_RISING>;
> +                       interrupts = <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>;
>                         status = "disabled";
>                         clocks = <&clkc CLKID_SD_EMMC_A>,
>                                  <&clkc CLKID_SD_EMMC_A_CLK0>,
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
> index a79a35e84..ae1a5a568 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
> @@ -603,7 +603,7 @@ apb: apb at d0000000 {
>                         sd_emmc_a: mmc at 70000 {
>                                 compatible = "amlogic,meson-gx-mmc", "amlogic,meson-gxbb-mmc";
>                                 reg = <0x0 0x70000 0x0 0x800>;
> -                               interrupts = <GIC_SPI 216 IRQ_TYPE_EDGE_RISING>;
> +                               interrupts = <GIC_SPI 216 IRQ_TYPE_LEVEL_HIGH>;
>                                 status = "disabled";
>                         };
>
> --
> 2.39.1
>

Please also change arch/arm64/boot/dts/amlogic/meson-axg.dtsi
sd_emmc_b because it was tested on that platform.

>
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