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From: Jiada Wang <jiada_wang@mentor.com>
To: <nick@shmanahar.org>, <dmitry.torokhov@gmail.com>,
	<jikos@kernel.org>, <benjamin.tissoires@redhat.com>,
	<bsz@semihalf.com>, <rydberg@bitmath.org>
Cc: <linux-input@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<erosca@de.adit-jv.com>, <Andrew_Gabbasov@mentor.com>,
	<jiada_wang@mentor.com>
Subject: [PATCH v8 31/52] Input: atmel_mxt_ts - implement debug output for messages
Date: Thu, 19 Mar 2020 07:59:55 -0700
Message-ID: <20200319150016.61398-32-jiada_wang@mentor.com> (raw)
In-Reply-To: <20200319150016.61398-1-jiada_wang@mentor.com>

From: Nick Dyer <nick.dyer@itdev.co.uk>

Add a debug switch which causes all messages from the touch controller to
be dumped to the dmesg log with a set prefix "MXT MSG:". This is used by
Atmel user-space utilities to debug touch operation. Enabling this output
does impact touch performance.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
(cherry picked from ndyer/linux/for-upstream commit 3c3fcfdd4889dfeb1c80ae8cd94a622c6342b06a)
[gdavis: Forward port and fix conflicts.]
Signed-off-by: George G. Davis <george_davis@mentor.com>
[jiada: Replace symbolic permissions 'S_IWUSR | S_IRUSR' with 0600]
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 47 ++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 3 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 2c3a59ff70c4..10da40c6c91b 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -335,6 +335,7 @@ struct mxt_data {
 	u8 t100_aux_ampl;
 	u8 t100_aux_area;
 	u8 t100_aux_vect;
+	bool debug_enabled;
 	u8 max_reportid;
 	u32 config_crc;
 	u32 info_crc;
@@ -460,8 +461,11 @@ static bool mxt_object_readable(unsigned int type)
 
 static void mxt_dump_message(struct mxt_data *data, u8 *message)
 {
-	dev_dbg(&data->client->dev, "message: %*ph\n",
-		data->T5_msg_size, message);
+	/* debug message with prefix 'MXT MSG:' used by
+	 * Atmel user-space utilities to debug touch operation
+	 */
+	dev_dbg(&data->client->dev, "MXT MSG: %*ph\n",
+		       data->T5_msg_size, message);
 }
 
 static int mxt_wait_for_completion(struct mxt_data *data,
@@ -1211,6 +1215,7 @@ static void mxt_proc_t93_messages(struct mxt_data *data, u8 *msg)
 static int mxt_proc_message(struct mxt_data *data, u8 *message)
 {
 	u8 report_id = message[0];
+	bool dump = data->debug_enabled;
 
 	if (report_id == MXT_RPTID_NOMSG)
 		return 0;
@@ -1245,9 +1250,12 @@ static int mxt_proc_message(struct mxt_data *data, u8 *message)
 	} else if (report_id == data->T93_reportid) {
 		mxt_proc_t93_messages(data, message);
 	} else {
-		mxt_dump_message(data, message);
+		dump = true;
 	}
 
+	if (dump)
+		mxt_dump_message(data, message);
+
 	return 1;
 }
 
@@ -3519,6 +3527,36 @@ static ssize_t mxt_update_cfg_store(struct device *dev,
 	return ret;
 }
 
+static ssize_t mxt_debug_enable_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct mxt_data *data = dev_get_drvdata(dev);
+	char c;
+
+	c = data->debug_enabled ? '1' : '0';
+	return scnprintf(buf, PAGE_SIZE, "%c\n", c);
+}
+
+static ssize_t mxt_debug_enable_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct mxt_data *data = dev_get_drvdata(dev);
+	u8 i;
+	ssize_t ret;
+
+	if (kstrtou8(buf, 0, &i) == 0 && i < 2) {
+		data->debug_enabled = (i == 1);
+
+		dev_dbg(dev, "%s\n", i ? "debug enabled" : "debug disabled");
+		ret = count;
+	} else {
+		dev_dbg(dev, "debug_enabled write error\n");
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
 static DEVICE_ATTR(update_fw, 0200, NULL, mxt_update_fw_store);
 
 static struct attribute *mxt_fw_attrs[] = {
@@ -3535,6 +3573,8 @@ static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
 static DEVICE_ATTR(update_cfg, 0200, NULL, mxt_update_cfg_store);
 static DEVICE_ATTR(config_crc, 0444, mxt_config_crc_show, NULL);
+static DEVICE_ATTR(debug_enable, 0600, mxt_debug_enable_show,
+		   mxt_debug_enable_store);
 
 static struct attribute *mxt_attrs[] = {
 	&dev_attr_fw_version.attr,
@@ -3542,6 +3582,7 @@ static struct attribute *mxt_attrs[] = {
 	&dev_attr_object.attr,
 	&dev_attr_update_cfg.attr,
 	&dev_attr_config_crc.attr,
+	&dev_attr_debug_enable.attr,
 	NULL
 };
 
-- 
2.17.1


  parent reply index

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-19 14:59 [PATCH v8 00/52] atmel_mxt_ts misc Jiada Wang
2020-03-19 14:59 ` [PATCH v8 01/52] Input: introduce input_mt_report_slot_inactive Jiada Wang
2020-03-19 14:59 ` [PATCH v8 02/52] Input: atmel_mxt_ts - rework sysfs init/remove Jiada Wang
2020-03-19 14:59 ` [PATCH v8 03/52] Input: atmel_mxt_ts - only read messages in mxt_acquire_irq() when necessary Jiada Wang
2020-03-19 14:59 ` [PATCH v8 04/52] Input: atmel_mxt_ts - split large i2c transfers into blocks Jiada Wang
2020-03-19 14:59 ` [PATCH v8 05/52] Input: atmel_mxt_ts - output status from T48 Noise Supression Jiada Wang
2020-03-19 14:59 ` [PATCH v8 06/52] Input: atmel_mxt_ts - output status from T42 Touch Suppression Jiada Wang
2020-03-19 14:59 ` [PATCH v8 07/52] Input: atmel_mxt_ts - implement T9 vector/orientation support Jiada Wang
2020-03-19 14:59 ` [PATCH v8 08/52] Input: atmel_mxt_ts - implement T15 Key Array support Jiada Wang
2020-03-19 14:59 ` [PATCH v8 09/52] Input: atmel_mxt_ts - handle reports from T47 Stylus object Jiada Wang
2020-03-19 14:59 ` [PATCH v8 10/52] Input: atmel_mxt_ts - implement support for T107 active stylus Jiada Wang
2020-03-19 14:59 ` [PATCH v8 11/52] Input: atmel_mxt_ts - add debug for T92 gesture and T93 touch seq msgs Jiada Wang
2020-03-19 14:59 ` [PATCH v8 12/52] Input: atmel_mxt_ts - release touch state during suspend Jiada Wang
2020-03-19 14:59 ` [PATCH v8 13/52] Input: atmel_mxt_ts - add regulator control support Jiada Wang
2020-03-19 14:59 ` [PATCH v8 14/52] dt-bindings: input: atmel: add suspend mode support Jiada Wang
2020-03-19 14:59 ` [PATCH v8 15/52] Input: atmel_mxt_ts - report failures in suspend/resume Jiada Wang
2020-03-19 14:59 ` [PATCH v8 16/52] Input: atmel_mxt_ts - allow specification of firmware file name Jiada Wang
2020-03-19 14:59 ` [PATCH v8 17/52] Input: atmel_mxt_ts - handle cfg filename via pdata/sysfs Jiada Wang
2020-03-19 14:59 ` [PATCH v8 18/52] dt-bindings: input: atmel: provide name of configuration file Jiada Wang
2020-03-19 14:59 ` [PATCH v8 19/52] Input: atmel_mxt_ts - allow input name to be specified in platform data Jiada Wang
2020-03-19 14:59 ` [PATCH v8 20/52] dt-bindings: input: atmel: support to specify input name Jiada Wang
2020-03-19 14:59 ` [PATCH v8 21/52] Input: atmel_mxt_ts - add config checksum attribute to sysfs Jiada Wang
2020-03-19 14:59 ` [PATCH v8 22/52] Input: atmel_mxt_ts - refactor firmware flash to extract context into struct Jiada Wang
2020-03-19 14:59 ` [PATCH v8 23/52] Input: atmel_mxt_ts - refactor code to enter bootloader into separate func Jiada Wang
2020-03-19 14:59 ` [PATCH v8 24/52] Input: atmel_mxt_ts - combine bootloader version query with probe Jiada Wang
2020-03-19 14:59 ` [PATCH v8 25/52] Input: atmel_mxt_ts - improve bootloader state machine handling Jiada Wang
2020-03-19 14:59 ` [PATCH v8 26/52] Input: atmel_mxt_ts - rename bl_completion to chg_completion Jiada Wang
2020-03-19 14:59 ` [PATCH v8 27/52] Input: atmel_mxt_ts - make bootloader interrupt driven Jiada Wang
2020-03-19 14:59 ` [PATCH v8 28/52] Input: atmel_mxt_ts - delay enabling IRQ when not using regulators Jiada Wang
2020-03-19 14:59 ` [PATCH v8 29/52] Input: atmel_mxt_ts - implement I2C retries Jiada Wang
2020-03-19 14:59 ` [PATCH v8 30/52] Input: atmel_mxt_ts - orientation is not present in hover Jiada Wang
2020-03-19 14:59 ` Jiada Wang [this message]
2020-03-19 14:59 ` [PATCH v8 32/52] Input: atmel_mxt_ts - implement improved debug message interface Jiada Wang
2020-03-19 14:59 ` [PATCH v8 33/52] Input: atmel_mxt_ts - eliminate data->raw_info_block Jiada Wang
2020-03-19 14:59 ` [PATCH v8 34/52] Input: atmel_mxt_ts - Change call-points of mxt_free_* functions Jiada Wang
2020-03-19 14:59 ` [PATCH v8 35/52] Input: atmel_mxt_ts - rely on calculated_crc rather than file config_crc Jiada Wang
2020-03-19 15:00 ` [PATCH v8 36/52] input: atmel_mxt_ts: export GPIO reset line via sysfs Jiada Wang
2020-03-19 15:00 ` [PATCH v8 37/52] input: atmel_mxt_ts: Add Missing Delay for reset handling of Atmel touch panel controller in detachable displays Jiada Wang
2020-03-19 15:00 ` [PATCH v8 38/52] Input: atmel_mxt_ts: Add support for run self-test routine Jiada Wang
2020-03-19 15:00 ` [PATCH v8 39/52] Input: atmel_mxt_ts: Limit the max bytes transferred in an i2c transaction Jiada Wang
2020-03-19 15:00 ` [PATCH v8 40/52] dt-bindings: input: atmel: support to set max bytes transferred Jiada Wang
2020-03-19 15:00 ` [PATCH v8 41/52] Input: atmel_mxt_ts: return error from mxt_process_messages_until_invalid() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 42/52] Input: Atmel: improve error handling in mxt_start() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 43/52] Input: Atmel: improve error handling in mxt_initialize() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 44/52] Input: Atmel: improve error handling in mxt_update_cfg() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 45/52] Input: Atmel: Improve error handling in mxt_initialize_input_device() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 46/52] Input: Atmel: handle ReportID "0x00" while processing T5 messages Jiada Wang
2020-03-19 15:00 ` [PATCH v8 47/52] Input: Atmel: use T44 object to process " Jiada Wang
2020-03-19 15:00 ` [PATCH v8 48/52] Input: atmel_mxt_ts: use gpiod_set_value_cansleep for reset pin Jiada Wang
2020-03-19 15:00 ` [PATCH v8 49/52] input: touchscreen: atmel_mxt_ts: Added sysfs entry for touchscreen status Jiada Wang
2020-03-19 15:00 ` [PATCH v8 50/52] input: atmel_mxt_ts: added sysfs interface to update atmel T38 data Jiada Wang
2020-03-19 15:00 ` [PATCH v8 51/52] Input: atmel_mxt_ts: Implement synchronization during various operation Jiada Wang
2020-03-19 15:00 ` [PATCH v8 52/52] Input: atmel_mxt_ts - Fix compilation warning Jiada Wang

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