From: Hans de Goede hdegoede@redhat.com
[ Upstream commit c7e37cc6240767f794678d11704935d49cc81d59 ]
On ACPI systems (irq_pin_access_method == IRQ_PIN_ACCESS_ACPI_*) the driver does not reset the controller at probe time, because sometimes the system firmware loads a config and resetting might loose this config.
On the Nanote UMPC-01 device OTOH the config is in flash of the controller, the controller needs a reset to load this; and the system firmware does not reset the controller on a cold boot.
To fix the Nanote UMPC-01 touchscreen not working on a cold boot, try resetting the controller and then re-reading the config when encountering a config with 0 width/height/max_touch_num value and the controller has not already been reset by goodix_ts_probe().
This should be safe to do in general because normally we should never encounter a config with 0 width/height/max_touch_num. Doing this in general not only avoids the need for a DMI quirk, but also might help other systems.
Signed-off-by: Hans de Goede hdegoede@redhat.com Reviewed-by: Bastien Nocera hadess@hadess.net Link: https://lore.kernel.org/r/20221025122930.421377-2-hdegoede@redhat.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/touchscreen/goodix.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c index 3c9cdb87770f..9fd898b4f170 100644 --- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c @@ -775,6 +775,7 @@ static int goodix_configure_dev(struct goodix_ts_data *ts) input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+retry_read_config: /* Read configuration and apply touchscreen parameters */ goodix_read_config(ts);
@@ -782,6 +783,16 @@ static int goodix_configure_dev(struct goodix_ts_data *ts) touchscreen_parse_properties(ts->input_dev, true, &ts->prop);
if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { + if (!ts->reset_controller_at_probe && + ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { + dev_info(&ts->client->dev, "Config not set, resetting controller\n"); + /* Retry after a controller reset */ + ts->reset_controller_at_probe = true; + error = goodix_reset(ts); + if (error) + return error; + goto retry_read_config; + } dev_err(&ts->client->dev, "Invalid config (%d, %d, %d), using defaults\n", ts->prop.max_x, ts->prop.max_y, ts->max_touch_num);