[{"id":3677520,"web_url":"http://patchwork.ozlabs.org/comment/3677520/","msgid":"","list_archive_url":null,"date":"2026-04-15T07:47:29","subject":"Re: [PATCH] arm: socfpga: Ensure FPGA in user mode before enabling\n the bridges","submitter":{"id":90079,"url":"http://patchwork.ozlabs.org/api/people/90079/","name":"Chee, Tien Fong","email":"tien.fong.chee@altera.com"},"content":"Hi Dinesh,\n\nOn 4/3/2026 11:43 am, dinesh.maniyam@altera.com wrote:\n> From: Dinesh Maniyam \n>\n> Unexpected behavior and error can occur if FPGA is accessed in unknown\n> state.Always checking with FPGA in user mode is required to ensure\n> system stability.\n>\n> Signed-off-by: Tien Fong Chee \n> Signed-off-by: Dinesh Maniyam \n> ---\n> arch/arm/mach-socfpga/misc_arria10.c | 13 ++++++++++---\n> 1 file changed, 10 insertions(+), 3 deletions(-)\n>\n> diff --git a/arch/arm/mach-socfpga/misc_arria10.c b/arch/arm/mach-socfpga/misc_arria10.c\n> index 7e0f3875b7c..6b25ab917ca 100644\n> --- a/arch/arm/mach-socfpga/misc_arria10.c\n> +++ b/arch/arm/mach-socfpga/misc_arria10.c\n> @@ -13,6 +13,7 @@\n> #include \n> #include \n> #include \n> +#include \n> #include \n> #include \n> #include \n> @@ -126,10 +127,16 @@ int print_cpuinfo(void)\n> \n> void do_bridge_reset(int enable, unsigned int mask)\n\n\nmask is unused on Arria 10—please mark it __maybe_unused so we do not \ntrip -Wunused-parameter while keeping the shared API.\n\nExample: unsigned int mask __maybe_unused\n\n\n> {\n> -\tif (enable)\n> -\t\tsocfpga_reset_deassert_bridges_handoff();\n> -\telse\n> +\tif (enable) {\n> +\t\tif (is_fpgamgr_user_mode()) {\n> +\t\t\tsocfpga_reset_deassert_bridges_handoff();\n> +\t\t} else {\n> +\t\t\tputs(\"Bridges: Failed to enable because FPGA is not \");\n> +\t\t\tputs(\"in user mode\\n\");\n\n\nSingle line puts is preferred\n\nExample:\n         puts(\"Bridges: failed to enable because FPGA is not \"\n                 \"in user mode\\n\");\n\nBest regards,\n\nTien Fong","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=altera.com header.i=@altera.com header.a=rsa-sha256\n header.s=selector2 header.b=cHzdVPi8;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=pass (p=reject dis=none) header.from=altera.com","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=altera.com header.i=@altera.com header.b=\"cHzdVPi8\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=reject dis=none) header.from=altera.com","phobos.denx.de;\n spf=pass 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phobos.denx.de","X-Virus-Status":"Clean"}},{"id":3677925,"web_url":"http://patchwork.ozlabs.org/comment/3677925/","msgid":"","list_archive_url":null,"date":"2026-04-16T04:14:52","subject":"Re: [PATCH] arm: socfpga: Ensure FPGA in user mode before enabling\n the bridges","submitter":{"id":90303,"url":"http://patchwork.ozlabs.org/api/people/90303/","name":"Maniyam, Dinesh","email":"dinesh.maniyam@altera.com"},"content":"Hi Tien Fong,\n\nOn 15/4/2026 3:47 pm, Chee, Tien Fong wrote:\n> Hi Dinesh,\n>\n> On 4/3/2026 11:43 am, dinesh.maniyam@altera.com wrote:\n>> From: Dinesh Maniyam \n>>\n>> Unexpected behavior and error can occur if FPGA is accessed in unknown\n>> state.Always checking with FPGA in user mode is required to ensure\n>> system stability.\n>>\n>> Signed-off-by: Tien Fong Chee \n>> Signed-off-by: Dinesh Maniyam \n>> ---\n>>   arch/arm/mach-socfpga/misc_arria10.c | 13 ++++++++++---\n>>   1 file changed, 10 insertions(+), 3 deletions(-)\n>>\n>> diff --git a/arch/arm/mach-socfpga/misc_arria10.c \n>> b/arch/arm/mach-socfpga/misc_arria10.c\n>> index 7e0f3875b7c..6b25ab917ca 100644\n>> --- a/arch/arm/mach-socfpga/misc_arria10.c\n>> +++ b/arch/arm/mach-socfpga/misc_arria10.c\n>> @@ -13,6 +13,7 @@\n>>   #include \n>>   #include \n>>   #include \n>> +#include \n>>   #include \n>>   #include \n>>   #include \n>> @@ -126,10 +127,16 @@ int print_cpuinfo(void)\n>>     void do_bridge_reset(int enable, unsigned int mask)\n>\n>\n> mask is unused on Arria 10—please mark it __maybe_unused so we do not \n> trip -Wunused-parameter while keeping the shared API.\n>\n> Example: unsigned int mask __maybe_unused\n>\n>\n>>   {\n>> -    if (enable)\n>> -        socfpga_reset_deassert_bridges_handoff();\n>> -    else\n>> +    if (enable) {\n>> +        if (is_fpgamgr_user_mode()) {\n>> +            socfpga_reset_deassert_bridges_handoff();\n>> +        } else {\n>> +            puts(\"Bridges: Failed to enable because FPGA is not \");\n>> +            puts(\"in user mode\\n\");\n>\n>\n> Single line puts is preferred\n>\n> Example:\n>         puts(\"Bridges: failed to enable because FPGA is not \"\n>                 \"in user mode\\n\");\n>\n> Best regards,\n>\n> Tien Fong\n>\n\nThanks for the review. I’ll update the patch to mark |mask| as \n|__maybe_unused\n|and combine the |puts()| calls as suggested.\n\nBest regards,\nDinesh","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=altera.com header.i=@altera.com header.a=rsa-sha256\n header.s=selector2 header.b=EEAPoczA;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=85.214.62.61; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=fail (p=reject dis=none) header.from=altera.com","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=altera.com header.i=@altera.com header.b=\"EEAPoczA\";\n\tdkim-atps=neutral","phobos.denx.de;\n dmarc=pass (p=reject dis=none) header.from=altera.com","phobos.denx.de;\n spf=pass smtp.mailfrom=dinesh.maniyam@altera.com","dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=altera.com;"],"Received":["from phobos.denx.de (phobos.denx.de [85.214.62.61])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fx4Rj2F68z1yG9\n\tfor ; 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