From patchwork Thu Feb 27 14:06:14 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 13994590 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0203E241677; Thu, 27 Feb 2025 14:07:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740665229; cv=none; b=Nss9ffqTnrc3yhh3W/qodIGUZPprEWR2oiyLQVh7M4/TbiKYhdM0GzxPw1Z9+HRE9hsQDHPb3lsNUz6eEfFj0VluLi/gI1KagSKr+lRPkpUGAGXa81k/PTUXabpAmiBPzZe7I8rB9saXjjwLxt59hAYywn7GFQYYg5aEfuZJ0m0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740665229; c=relaxed/simple; bh=dIHzKvs/CLNsdZuAwNYXUG9aLPMbUkYW5XbTPXy1O0E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=tJcaAN9SIfn8YiBgG907QuIAQZJtWh089rNnVL3k7XDte9+d/L2/8Yocm+QGVprKCsnqYh+4PwMTLFH01B9NkfVeXDuzbGXR+dLHh2Y49C3IE46XDt6YKeaKFieDobDXzYkwj1AjQOv1bQogMTzCkgvLsXP6xsJrvp2tHQnL5+Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=M9PW2c9y; arc=none smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="M9PW2c9y" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1740665228; x=1772201228; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=dIHzKvs/CLNsdZuAwNYXUG9aLPMbUkYW5XbTPXy1O0E=; b=M9PW2c9yNx1Jasl+k5byyITSrSDBCL804Xscmx5gvjYIFweSCd/naRwk 3rbmpLiDJ5XeuHauTgzRWkdz7BDrh8QidlsD5Ltz496IP/RU2hNzvWshV WWKYj2+tKRO4SAV3UvVZN7g8jMMAm3KZpZCW06qpxl47JSKA/AxWJB9pz BKGptgFtEGiyAos8GgZRLCUzkjcVqeODfLH4CKZ7wx7W8G43e2zk7+AJR CBFQ5Za6bFvrZIy4J9msyjG1CRNf+ECMGR/WnETxBayrKCeN3e+Lz4ZAL drBGTClliPy3DyujSAaI7TMXNedvNHePiiar0lt64FkNLRsS+Lxd9lnkT Q==; X-CSE-ConnectionGUID: u5lKXMEnTy2RyRymuKhNSg== X-CSE-MsgGUID: DSXT1WRPRNmsZ3eQs4gwYQ== X-IronPort-AV: E=McAfee;i="6700,10204,11358"; a="41438115" X-IronPort-AV: E=Sophos;i="6.13,319,1732608000"; d="scan'208";a="41438115" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2025 06:06:58 -0800 X-CSE-ConnectionGUID: yKBDOOB9TuG59qYmtoaCxg== X-CSE-MsgGUID: baI9oRBtRAeB6TQSYcruUw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,319,1732608000"; d="scan'208";a="116831771" Received: from ssimmeri-mobl2.amr.corp.intel.com (HELO yungchua-desk.intel.com) ([10.124.220.154]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2025 06:06:56 -0800 From: Bard Liao To: linux-sound@vger.kernel.org, broonie@kernel.org, tiwai@suse.de, vkoul@kernel.org Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org, pierre-louis.bossart@linux.dev, bard.liao@intel.com Subject: [PATCH v4 15/16] soundwire: debugfs: add interface for BPT/BRA transfers Date: Thu, 27 Feb 2025 22:06:14 +0800 Message-ID: <20250227140615.8147-16-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250227140615.8147-1-yung-chuan.liao@linux.intel.com> References: <20250227140615.8147-1-yung-chuan.liao@linux.intel.com> Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Pierre-Louis Bossart Add code to show what codec drivers will need to do to enable BPT/BRA transfers. The only difference is to set the 'command_type' file to '1'. A zero-value will rely on regular read/write commands in Column0. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao Reviewed-by: Péter Ujfalusi Reviewed-by: Liam Girdwood Reviewed-by: Ranjani Sridharan --- drivers/soundwire/debugfs.c | 84 ++++++++++++++++++++++++++++++------- 1 file changed, 68 insertions(+), 16 deletions(-) diff --git a/drivers/soundwire/debugfs.c b/drivers/soundwire/debugfs.c index 5bf0d9552433..3099ea074f10 100644 --- a/drivers/soundwire/debugfs.c +++ b/drivers/soundwire/debugfs.c @@ -136,9 +136,10 @@ static int sdw_slave_reg_show(struct seq_file *s_file, void *data) } DEFINE_SHOW_ATTRIBUTE(sdw_slave_reg); -#define MAX_CMD_BYTES 256 +#define MAX_CMD_BYTES (1024 * 1024) static int cmd; +static int cmd_type; static u32 start_addr; static size_t num_bytes; static u8 read_buffer[MAX_CMD_BYTES]; @@ -162,6 +163,25 @@ static int set_command(void *data, u64 value) DEFINE_DEBUGFS_ATTRIBUTE(set_command_fops, NULL, set_command, "%llu\n"); +static int set_command_type(void *data, u64 value) +{ + struct sdw_slave *slave = data; + + if (value > 1) + return -EINVAL; + + /* Userspace changed the hardware state behind the kernel's back */ + add_taint(TAINT_USER, LOCKDEP_STILL_OK); + + dev_dbg(&slave->dev, "command type: %s\n", value ? "BRA" : "Column0"); + + cmd_type = (int)value; + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(set_command_type_fops, NULL, + set_command_type, "%llu\n"); + static int set_start_address(void *data, u64 value) { struct sdw_slave *slave = data; @@ -197,9 +217,28 @@ static int set_num_bytes(void *data, u64 value) DEFINE_DEBUGFS_ATTRIBUTE(set_num_bytes_fops, NULL, set_num_bytes, "%llu\n"); +static int do_bpt_sequence(struct sdw_slave *slave, bool write, u8 *buffer) +{ + struct sdw_bpt_msg msg = {0}; + + msg.addr = start_addr; + msg.len = num_bytes; + msg.dev_num = slave->dev_num; + if (write) + msg.flags = SDW_MSG_FLAG_WRITE; + else + msg.flags = SDW_MSG_FLAG_READ; + msg.buf = buffer; + + return sdw_bpt_send_sync(slave->bus, slave, &msg); +} + static int cmd_go(void *data, u64 value) { + const struct firmware *fw = NULL; struct sdw_slave *slave = data; + ktime_t start_t; + ktime_t finish_t; int ret; if (value != 1) @@ -216,40 +255,52 @@ static int cmd_go(void *data, u64 value) return ret; } - /* Userspace changed the hardware state behind the kernel's back */ - add_taint(TAINT_USER, LOCKDEP_STILL_OK); - - dev_dbg(&slave->dev, "starting command\n"); - if (cmd == 0) { - const struct firmware *fw; - ret = request_firmware(&fw, firmware_file, &slave->dev); if (ret < 0) { dev_err(&slave->dev, "firmware %s not found\n", firmware_file); goto out; } - - if (fw->size != num_bytes) { + if (fw->size < num_bytes) { dev_err(&slave->dev, - "firmware %s: unexpected size %zd, desired %zd\n", + "firmware %s: firmware size %zd, desired %zd\n", firmware_file, fw->size, num_bytes); - release_firmware(fw); goto out; } + } - ret = sdw_nwrite_no_pm(slave, start_addr, num_bytes, fw->data); - release_firmware(fw); + /* Userspace changed the hardware state behind the kernel's back */ + add_taint(TAINT_USER, LOCKDEP_STILL_OK); + + dev_dbg(&slave->dev, "starting command\n"); + start_t = ktime_get(); + + if (cmd == 0) { + if (cmd_type) + ret = do_bpt_sequence(slave, true, (u8 *)fw->data); + else + ret = sdw_nwrite_no_pm(slave, start_addr, num_bytes, fw->data); } else { - ret = sdw_nread_no_pm(slave, start_addr, num_bytes, read_buffer); + memset(read_buffer, 0, sizeof(read_buffer)); + + if (cmd_type) + ret = do_bpt_sequence(slave, false, read_buffer); + else + ret = sdw_nread_no_pm(slave, start_addr, num_bytes, read_buffer); } - dev_dbg(&slave->dev, "command completed %d\n", ret); + finish_t = ktime_get(); out: + if (fw) + release_firmware(fw); + pm_runtime_mark_last_busy(&slave->dev); pm_runtime_put(&slave->dev); + dev_dbg(&slave->dev, "command completed, num_byte %zu status %d, time %lld ms\n", + num_bytes, ret, div_u64(finish_t - start_t, NSEC_PER_MSEC)); + return ret; } DEFINE_DEBUGFS_ATTRIBUTE(cmd_go_fops, NULL, @@ -291,6 +342,7 @@ void sdw_slave_debugfs_init(struct sdw_slave *slave) /* interface to send arbitrary commands */ debugfs_create_file("command", 0200, d, slave, &set_command_fops); + debugfs_create_file("command_type", 0200, d, slave, &set_command_type_fops); debugfs_create_file("start_address", 0200, d, slave, &set_start_address_fops); debugfs_create_file("num_bytes", 0200, d, slave, &set_num_bytes_fops); debugfs_create_file("go", 0200, d, slave, &cmd_go_fops);