[Buildroot] [PATCH] hsdk/linux: backporting patch enabling CONFIG_USB

[Yann E. MORIN]

Evgeniy, All,

On 2020-04-30 19:37 +0300, Evgeniy Didin spake thusly:
> With this commit we backporting critical Linux kernel patch
> which enables CONFIG_USB option for HSDK.
> 
> Signed-off-by: Evgeniy Didin <Evgeniy.Didin at synopsys.com>
> Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
> Cc: Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
> Cc: arc-buildroot at synopsys.com
> ---
>  .../0001-ARC-plat-hsdk-fix-USB-regression.patch    | 39 ++++++++++++++++++++++
>  configs/snps_archs38_hsdk_defconfig                |  1 +
>  2 files changed, 40 insertions(+)
>  create mode 100644 board/synopsys/hsdk/linux_patches/0001-ARC-plat-hsdk-fix-USB-regression.patch
> 
> diff --git a/board/synopsys/hsdk/linux_patches/0001-ARC-plat-hsdk-fix-USB-regression.patch b/board/synopsys/hsdk/linux_patches/0001-ARC-plat-hsdk-fix-USB-regression.patch
> new file mode 100644
> index 0000000000..882d2c61df
> --- /dev/null
> +++ b/board/synopsys/hsdk/linux_patches/0001-ARC-plat-hsdk-fix-USB-regression.patch
> @@ -0,0 +1,39 @@
> +From 4c13ca86dcf80a8c705b1f3674ff43d318e970e0 Mon Sep 17 00:00:00 2001
> +From: Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
> +Date: Tue, 7 Apr 2020 23:06:42 +0300
> +Subject: ARC: [plat-hsdk]: fix USB regression
> +
> +As of today the CONFIG_USB isn't explicitly present in HSDK defconfig
> +as it is implicitly forcibly enabled by UDL driver which selects CONFIG_USB
> +in its kconfig.
> +The commit 5d50bd440bc2 ("drm/udl: Make udl driver depend on CONFIG_USB")
> +reverse the dependencies between UDL and USB so UDL now depends on
> +CONFIG_USB and not selects it. This introduces regression for ARC HSDK
> +board as HSDK defconfig wasn't adjusted and now it misses USB support
> +due to lack of CONFIG_USB enabled.
> +
> +Fix that.
> +
> +Cc: <stable at vger.kernel.org> # 5.6.x
> +Fixes: 5d50bd440bc2 ("drm/udl: Make udl driver depend on CONFIG_USB")
> +Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
> +Signed-off-by: Vineet Gupta <vgupta at synopsys.com>
> +---
> + arch/arc/configs/hsdk_defconfig | 1 +
> + 1 file changed, 1 insertion(+)
> +
> +diff --git a/arch/arc/configs/hsdk_defconfig b/arch/arc/configs/hsdk_defconfig
> +index 0974226fab55..aa000075a575 100644
> +--- a/arch/arc/configs/hsdk_defconfig
> ++++ b/arch/arc/configs/hsdk_defconfig
> +@@ -65,6 +65,7 @@ CONFIG_DRM_UDL=y
> + CONFIG_DRM_ETNAVIV=y
> + CONFIG_FB=y
> + CONFIG_FRAMEBUFFER_CONSOLE=y
> ++CONFIG_USB=y
> + CONFIG_USB_EHCI_HCD=y
> + CONFIG_USB_EHCI_HCD_PLATFORM=y
> + CONFIG_USB_OHCI_HCD=y
> +-- 
> +cgit 1.2-0.3.lf.el7
> +
> diff --git a/configs/snps_archs38_hsdk_defconfig b/configs/snps_archs38_hsdk_defconfig
> index af7cba6c2e..4a002cd69f 100644
> --- a/configs/snps_archs38_hsdk_defconfig
> +++ b/configs/snps_archs38_hsdk_defconfig
> @@ -14,6 +14,7 @@ BR2_SYSTEM_DHCP="eth0"
>  BR2_LINUX_KERNEL=y
>  BR2_LINUX_KERNEL_CUSTOM_VERSION=y
>  BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.6.3"
> +BR2_LINUX_KERNEL_PATCH="board/synopsys/hsdk/linux_patches"
>  BR2_LINUX_KERNEL_DEFCONFIG="hsdk"
>  BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/synopsys/hsdk/linux.fragment"

Why don't you simply add CONFIG_USB=y to the fragment instead?

Regards,
Yann E. MORIN.

>  
> -- 
> 2.16.2
> 
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