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Mon, 11 Jan 2021 14:07:29 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 24A61F804C2; Mon, 11 Jan 2021 14:06:55 +0100 (CET) Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 09748F804C2 for ; Mon, 11 Jan 2021 14:06:52 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 09748F804C2 Received: from [123.114.32.120] (helo=localhost.localdomain) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1kywuE-0001Ym-AA; Mon, 11 Jan 2021 13:06:51 +0000 From: Hui Wang To: alsa-devel@alsa-project.org, tiwai@suse.de, perex@perex.cz, kai.vehmanen@linux.intel.com Subject: [RFC][PATCH v4 3/4] alsa: jack: add more jack_kctl debugfs nodes Date: Mon, 11 Jan 2021 21:05:56 +0800 Message-Id: <20210111130557.90208-4-hui.wang@canonical.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210111130557.90208-1-hui.wang@canonical.com> References: <20210111130557.90208-1-hui.wang@canonical.com> MIME-Version: 1.0 X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Adding 4 more debugfs nodes, users could get more information about the jack_kctl from them: - kctl_id, read-only, get jack_kctl->kctl's id sound/card0/HeadphoneJack# cat kctl_id Headphone Jack - mask_bits, read-only, get jack_kctl's events mask_bits sound/card0/HeadphoneJack# cat mask_bits 0x0001 HEADPHONE(0x0001) - status, read-only, get jack_kctl's current status headphone unplugged: sound/card0/HeadphoneJack# cat status 0x0000 headphone plugged: sound/card0/HeadphoneJack# cat status 0x0001 HEADPHONE(0x0001) - type, read-only, get jack's supported events type sound/card0/HeadphoneJack# cat type 0x0001 HEADPHONE(0x0001) Signed-off-by: Hui Wang --- sound/core/jack.c | 144 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+) diff --git a/sound/core/jack.c b/sound/core/jack.c index e1d1b26f3a5e..fc49dae887f8 100644 --- a/sound/core/jack.c +++ b/sound/core/jack.c @@ -230,6 +230,119 @@ static ssize_t jackin_inject_write(struct file *file, return ret; } +static ssize_t jack_kctl_id_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char *buf; + int len, ret; + + buf = kvzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = scnprintf(buf, PAGE_SIZE, "%s\n", jack_kctl->kctl->id.name); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + kvfree(buf); + return ret; +} + +/* the bit definition is aligned with snd_jack_types in jack.h */ +static const char * const jack_events_name[] = { + "HEADPHONE(0x0001)", "MICROPHONE(0x0002)", "LINEOUT(0x0004)", + "MECHANICAL(0x0008)", "VIDEOOUT(0x0010)", "LINEIN(0x0020)", + "", "", "", "BTN_5(0x0200)", "BTN_4(0x0400)", "BTN_3(0x0800)", + "BTN_2(0x1000)", "BTN_1(0x2000)", "BTN_0(0x4000)", "", +}; + +static int parse_mask_bits(unsigned int mask_bits, char *s) +{ + char *buf; + int len, i; + + buf = kvzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = scnprintf(buf, PAGE_SIZE, "0x%04x", mask_bits); + + for (i = 0; i < 16; i++) + if (mask_bits & (1 << i)) + len += scnprintf(buf + strlen(buf), PAGE_SIZE - strlen(buf), + " %s", jack_events_name[i]); + + len += scnprintf(buf + strlen(buf), PAGE_SIZE - strlen(buf), "\n"); + + strcpy(s, buf); + + kvfree(buf); + + return len; +} + +static ssize_t jack_kctl_mask_bits_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char *buf; + int len, ret; + + buf = kvzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = parse_mask_bits(jack_kctl->mask_bits, buf); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + kvfree(buf); + return ret; +} + +static ssize_t jack_kctl_status_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char *buf; + int len, ret; + + buf = kvzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = parse_mask_bits(jack_kctl->kctl->private_value, buf); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + kvfree(buf); + return ret; +} + +#ifdef CONFIG_SND_JACK_INPUT_DEV +static ssize_t jack_type_read(struct file *file, + char __user *to, size_t count, loff_t *ppos) +{ + struct snd_jack_kctl *jack_kctl = file->private_data; + char *buf; + int len, ret; + + buf = kvzalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len = parse_mask_bits(jack_kctl->jack->type, buf); + ret = simple_read_from_buffer(to, count, ppos, buf, len); + + kvfree(buf); + return ret; +} + +static const struct file_operations jack_type_fops = { + .open = simple_open, + .read = jack_type_read, + .llseek = default_llseek, +}; +#endif + static const struct file_operations sw_inject_enable_fops = { .open = simple_open, .read = sw_inject_enable_read, @@ -243,6 +356,24 @@ static const struct file_operations jackin_inject_fops = { .llseek = default_llseek, }; +static const struct file_operations jack_kctl_id_fops = { + .open = simple_open, + .read = jack_kctl_id_read, + .llseek = default_llseek, +}; + +static const struct file_operations jack_kctl_mask_bits_fops = { + .open = simple_open, + .read = jack_kctl_mask_bits_read, + .llseek = default_llseek, +}; + +static const struct file_operations jack_kctl_status_fops = { + .open = simple_open, + .read = jack_kctl_status_read, + .llseek = default_llseek, +}; + /* The substrings in the jack's name but not suitable for folder's name */ static const char * const dropped_chars[] = { "/", "=", ",", " ", @@ -282,6 +413,19 @@ static int snd_jack_debugfs_add_inject_node(struct snd_jack *jack, debugfs_create_file("jackin_inject", 0200, jack_kctl->jack_debugfs_root, jack_kctl, &jackin_inject_fops); + debugfs_create_file("kctl_id", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_id_fops); + + debugfs_create_file("mask_bits", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_mask_bits_fops); + + debugfs_create_file("status", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_kctl_status_fops); + +#ifdef CONFIG_SND_JACK_INPUT_DEV + debugfs_create_file("type", 0444, jack_kctl->jack_debugfs_root, jack_kctl, + &jack_type_fops); +#endif return 0; } #else /* CONFIG_DEBUG_FS */