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Input: ili210x - probe even if no resolution information

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Probe the touch controller driver even if resolution information is not
available. This can happen e.g. in case the touch controller suffered a
failed firmware update and is stuck in bootloader mode.

Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20230217025200.203833-1-marex@denx.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Marek Vasut 2023-05-06 11:40:03 -07:00 committed by Dmitry Torokhov
parent 5672bd308e
commit e1141b0c62
1 changed files with 23 additions and 13 deletions
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28
drivers/input/touchscreen/ili210x.c
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@ -370,22 +370,33 @@ static int ili251x_firmware_update_resolution(struct device *dev)
/* The firmware update blob might have changed the resolution. */
error = priv->chip->read_reg(client, REG_PANEL_INFO, &rs, sizeof(rs));
if (error)
return error;
if (!error) {
resx = le16_to_cpup((__le16 *)rs);
resy = le16_to_cpup((__le16 *)(rs + 2));
/* The value reported by the firmware is invalid. */
if (!resx || resx == 0xffff || !resy || resy == 0xffff)
return -EINVAL;
error = -EINVAL;
}
/*
* In case of error, the firmware might be stuck in bootloader mode,
* e.g. after a failed firmware update. Set maximum resolution, but
* do not fail to probe, so the user can re-trigger the firmware
* update and recover the touch controller.
*/
if (error) {
dev_warn(dev, "Invalid resolution reported by controller.\n");
resx = 16384;
resy = 16384;
}
input_abs_set_max(priv->input, ABS_X, resx - 1);
input_abs_set_max(priv->input, ABS_Y, resy - 1);
input_abs_set_max(priv->input, ABS_MT_POSITION_X, resx - 1);
input_abs_set_max(priv->input, ABS_MT_POSITION_Y, resy - 1);
return 0;
return error;
}
static ssize_t ili251x_firmware_update_firmware_version(struct device *dev)
@ -977,11 +988,10 @@ static int ili210x_i2c_probe(struct i2c_client *client)
if (priv->chip->has_pressure_reg)
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xa, 0, 0);
error = ili251x_firmware_update_cached_state(dev);
if (error) {
dev_err(dev, "Unable to cache firmware information, err: %d\n",
if (error)
dev_warn(dev, "Unable to cache firmware information, err: %d\n",
error);
return error;
}
touchscreen_parse_properties(input, true, &priv->prop);
error = input_mt_init_slots(input, priv->chip->max_touches,