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Add no-IRQ mode support for EDT touch.

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andreili 2025-07-27 12:12:32 +02:00
parent cd4e03082c
commit 933a2c3d1c
1 changed files with 161 additions and 0 deletions
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161
patch/kernel/printer_edt_ft5x06_noIRQ_support.patch Normal file
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@ -0,0 +1,161 @@
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index 0d7bf18e2508..535e84de038e 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -77,6 +77,10 @@
#define EDT_DEFAULT_NUM_X 1024
#define EDT_DEFAULT_NUM_Y 1024
+#define RESET_DELAY_MS 300 /* reset deassert to I2C */
+#define FIRST_POLL_DELAY_MS 300 /* in addition to the above */
+#define POLL_INTERVAL_MS 17 /* 17ms = 60fps */
+
#define M06_REG_CMD(factory) ((factory) ? 0xf3 : 0xfc)
#define M06_REG_ADDR(factory, addr) ((factory) ? (addr) & 0x7f : (addr) & 0x3f)
@@ -135,6 +139,7 @@ struct edt_ft5x06_ts_data {
int offset_y;
int report_rate;
int max_support_points;
+ unsigned int known_ids;
int point_len;
u8 tdata_cmd;
int tdata_len;
@@ -147,6 +152,9 @@ struct edt_ft5x06_ts_data {
enum edt_ver version;
unsigned int crc_errors;
unsigned int header_errors;
+
+ struct timer_list timer;
+ struct work_struct work_i2c_poll;
};
struct edt_i2c_chip_data {
@@ -303,6 +311,10 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
u8 rdbuf[63];
int i, type, x, y, id;
int error;
+ unsigned int active_ids = 0, known_ids = tsdata->known_ids;
+ long released_ids;
+ int b = 0;
+ unsigned int num_points;
memset(rdbuf, 0, sizeof(rdbuf));
error = regmap_bulk_read(tsdata->regmap, tsdata->tdata_cmd, rdbuf,
@@ -313,7 +325,16 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
goto out;
}
- for (i = 0; i < tsdata->max_support_points; i++) {
+ /* M09/M12 does not send header or CRC */
+ if (tsdata->version == EDT_M06) {
+ num_points = tsdata->max_support_points;
+ } else {
+ /* Register 2 is TD_STATUS, containing the number of touch
+ * points.
+ */
+ num_points = min(rdbuf[2] & 0xf, tsdata->max_support_points);
+ }
+ for (i = 0; i < num_points; i++) {
u8 *buf = &rdbuf[i * tsdata->point_len + tsdata->tdata_offset];
type = buf[0] >> 6;
@@ -335,11 +356,26 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
input_mt_slot(tsdata->input, id);
if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
- type != TOUCH_EVENT_UP))
+ type != TOUCH_EVENT_UP)) {
touchscreen_report_pos(tsdata->input, &tsdata->prop,
x, y, true);
+ active_ids |= BIT(id);
+ } else {
+ known_ids &= ~BIT(id);
+ }
}
+ /* One issue with the device is the TOUCH_UP message is not always
+ * returned. Instead track which ids we know about and report when they
+ * are no longer updated
+ */
+ released_ids = known_ids & ~active_ids;
+ for_each_set_bit_from(b, &released_ids, tsdata->max_support_points) {
+ input_mt_slot(tsdata->input, b);
+ input_mt_report_slot_inactive(tsdata->input);
+ }
+ tsdata->known_ids = active_ids;
+
input_mt_report_pointer_emulation(tsdata->input, true);
input_sync(tsdata->input);
@@ -347,6 +383,22 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static void edt_ft5x06_ts_irq_poll_timer(struct timer_list *t)
+{
+ struct edt_ft5x06_ts_data *tsdata = from_timer(tsdata, t, timer);
+
+ schedule_work(&tsdata->work_i2c_poll);
+ mod_timer(&tsdata->timer, jiffies + msecs_to_jiffies(POLL_INTERVAL_MS));
+}
+
+static void edt_ft5x06_ts_work_i2c_poll(struct work_struct *work)
+{
+ struct edt_ft5x06_ts_data *tsdata = container_of(work,
+ struct edt_ft5x06_ts_data, work_i2c_poll);
+
+ edt_ft5x06_ts_isr(0, tsdata);
+}
+
struct edt_ft5x06_attribute {
struct device_attribute dattr;
size_t field_offset;
@@ -1332,17 +1384,26 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client)
return error;
}
- irq_flags = irq_get_trigger_type(client->irq);
- if (irq_flags == IRQF_TRIGGER_NONE)
- irq_flags = IRQF_TRIGGER_FALLING;
- irq_flags |= IRQF_ONESHOT;
+ if (client->irq) {
+ irq_flags = irq_get_trigger_type(client->irq);
+ if (irq_flags == IRQF_TRIGGER_NONE)
+ irq_flags = IRQF_TRIGGER_FALLING;
+ irq_flags |= IRQF_ONESHOT;
- error = devm_request_threaded_irq(&client->dev, client->irq,
- NULL, edt_ft5x06_ts_isr, irq_flags,
- client->name, tsdata);
- if (error) {
- dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
- return error;
+ error = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, edt_ft5x06_ts_isr, irq_flags,
+ client->name, tsdata);
+ if (error) {
+ dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
+ return error;
+ }
+ } else {
+ INIT_WORK(&tsdata->work_i2c_poll,
+ edt_ft5x06_ts_work_i2c_poll);
+ timer_setup(&tsdata->timer, edt_ft5x06_ts_irq_poll_timer, 0);
+ tsdata->timer.expires =
+ jiffies + msecs_to_jiffies(FIRST_POLL_DELAY_MS);
+ add_timer(&tsdata->timer);
}
error = input_register_device(input);
@@ -1364,6 +1425,10 @@ static void edt_ft5x06_ts_remove(struct i2c_client *client)
{
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
+ if (!client->irq) {
+ del_timer(&tsdata->timer);
+ cancel_work_sync(&tsdata->work_i2c_poll);
+ }
edt_ft5x06_ts_teardown_debugfs(tsdata);
}