| Message ID | 20210302145057.112437-1-hdegoede@redhat.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Input: elants_i2c - Do not bind to i2c-hid compatible ACPI instantiated devices | expand |
Hi Hans, On Tue, Mar 2, 2021 at 3:51 PM Hans de Goede <hdegoede@redhat.com> wrote: > > Several users have been reporting that elants_i2c gives several errors > during probe and that their touchscreen does not work on their Lenovo AMD > based laptops with a touchscreen with a ELAN0001 ACPI hardware-id: > > [ 0.550596] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vcc33 not found, using dummy regulator > [ 0.551836] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vccio not found, using dummy regulator > [ 0.560932] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 > [ 0.562427] elants_i2c i2c-ELAN0001:00: software reset failed: -121 > [ 0.595925] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 > [ 0.597974] elants_i2c i2c-ELAN0001:00: software reset failed: -121 > [ 0.621893] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 > [ 0.622504] elants_i2c i2c-ELAN0001:00: software reset failed: -121 > [ 0.632650] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (4d 61 69 6e): -121 > [ 0.634256] elants_i2c i2c-ELAN0001:00: boot failed: -121 > [ 0.699212] elants_i2c i2c-ELAN0001:00: invalid 'hello' packet: 00 00 ff ff > [ 1.630506] elants_i2c i2c-ELAN0001:00: Failed to read fw id: -121 > [ 1.645508] elants_i2c i2c-ELAN0001:00: unknown packet 00 00 ff ff > > Despite these errors, the elants_i2c driver stays bound to the device > (it returns 0 from its probe method despite the errors), blocking the > i2c-hid driver from binding. > > Manually unbinding the elants_i2c driver and binding the i2c-hid driver > makes the touchscreen work. > > Check if the ACPI-fwnode for the touchscreen contains one of the i2c-hid > compatiblity-id strings and if it has the I2C-HID spec's DSM to get the > HID descriptor address, If it has both then make elants_i2c not bind, > so that the i2c-hid driver can bind. > > This assumes that non of the (older) elan touchscreens which actually > need the elants_i2c driver falsely advertise an i2c-hid compatiblity-id > + DSM in their ACPI-fwnodes. If some of them actually do have this > false advertising, then this change may lead to regressions. I like the v2 much better, and I believe the regressions should be fairly small now. One nitpick below: > > Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> > BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207759 > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > --- > drivers/input/touchscreen/elants_i2c.c | 25 +++++++++++++++++++++++++ > 1 file changed, 25 insertions(+) > > diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c > index 4c2b579f6c8b..510638e5ba5a 100644 > --- a/drivers/input/touchscreen/elants_i2c.c > +++ b/drivers/input/touchscreen/elants_i2c.c > @@ -1334,6 +1334,12 @@ static void elants_i2c_power_off(void *_data) > } > } > > +static const struct acpi_device_id i2c_hid_ids[] = { > + {"ACPI0C50", 0 }, > + {"PNP0C50", 0 }, > + { }, > +}; > + > static int elants_i2c_probe(struct i2c_client *client, > const struct i2c_device_id *id) > { > @@ -1342,6 +1348,25 @@ static int elants_i2c_probe(struct i2c_client *client, > unsigned long irqflags; > int error; > > +#ifdef CONFIG_ACPI > + /* Don't bind to i2c-hid compatible devices, these are handled by the i2c-hid drv. */ > + if (acpi_match_device_ids(ACPI_COMPANION(&client->dev), i2c_hid_ids) == 0) { > + static const guid_t i2c_hid_guid = > + GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555, > + 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE); Andy in https://patchwork.kernel.org/project/linux-input/patch/20210226193225.47129-3-andriy.shevchenko@linux.intel.com/ proposed a few cleanups for i2c-hid. I believe a similar pacth should be squashed here (the include is the one I am more worried about). Besides that: Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Cheers, Benjamin > + acpi_handle handle = ACPI_HANDLE(&client->dev); > + union acpi_object *obj; > + > + obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, > + ACPI_TYPE_INTEGER); > + if (obj) { > + dev_warn(&client->dev, "elants_i2c: This device appears to be an I2C-HID device, not binding\n"); > + ACPI_FREE(obj); > + return -ENODEV; > + } > + } > +#endif > + > if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { > dev_err(&client->dev, > "%s: i2c check functionality error\n", DEVICE_NAME); > -- > 2.30.1 >
On Tue, Mar 02, 2021 at 03:50:57PM +0100, Hans de Goede wrote: > Several users have been reporting that elants_i2c gives several errors > during probe and that their touchscreen does not work on their Lenovo AMD > based laptops with a touchscreen with a ELAN0001 ACPI hardware-id: > > [ 0.550596] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vcc33 not found, using dummy regulator > [ 0.551836] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vccio not found, using dummy regulator > [ 0.560932] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 > [ 0.562427] elants_i2c i2c-ELAN0001:00: software reset failed: -121 > [ 0.595925] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 > [ 0.597974] elants_i2c i2c-ELAN0001:00: software reset failed: -121 > [ 0.621893] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 > [ 0.622504] elants_i2c i2c-ELAN0001:00: software reset failed: -121 > [ 0.632650] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (4d 61 69 6e): -121 > [ 0.634256] elants_i2c i2c-ELAN0001:00: boot failed: -121 > [ 0.699212] elants_i2c i2c-ELAN0001:00: invalid 'hello' packet: 00 00 ff ff > [ 1.630506] elants_i2c i2c-ELAN0001:00: Failed to read fw id: -121 > [ 1.645508] elants_i2c i2c-ELAN0001:00: unknown packet 00 00 ff ff > > Despite these errors, the elants_i2c driver stays bound to the device > (it returns 0 from its probe method despite the errors), blocking the > i2c-hid driver from binding. > > Manually unbinding the elants_i2c driver and binding the i2c-hid driver > makes the touchscreen work. > > Check if the ACPI-fwnode for the touchscreen contains one of the i2c-hid > compatiblity-id strings and if it has the I2C-HID spec's DSM to get the > HID descriptor address, If it has both then make elants_i2c not bind, > so that the i2c-hid driver can bind. > > This assumes that non of the (older) elan touchscreens which actually > need the elants_i2c driver falsely advertise an i2c-hid compatiblity-id > + DSM in their ACPI-fwnodes. If some of them actually do have this > false advertising, then this change may lead to regressions. > > Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> > BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207759 > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > --- > drivers/input/touchscreen/elants_i2c.c | 25 +++++++++++++++++++++++++ > 1 file changed, 25 insertions(+) > > diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c > index 4c2b579f6c8b..510638e5ba5a 100644 > --- a/drivers/input/touchscreen/elants_i2c.c > +++ b/drivers/input/touchscreen/elants_i2c.c > @@ -1334,6 +1334,12 @@ static void elants_i2c_power_off(void *_data) > } > } > > +static const struct acpi_device_id i2c_hid_ids[] = { > + {"ACPI0C50", 0 }, > + {"PNP0C50", 0 }, > + { }, > +}; This ideally needs to be protected by CONFIG_ACPI. > + > static int elants_i2c_probe(struct i2c_client *client, > const struct i2c_device_id *id) > { > @@ -1342,6 +1348,25 @@ static int elants_i2c_probe(struct i2c_client *client, > unsigned long irqflags; > int error; > > +#ifdef CONFIG_ACPI > + /* Don't bind to i2c-hid compatible devices, these are handled by the i2c-hid drv. */ > + if (acpi_match_device_ids(ACPI_COMPANION(&client->dev), i2c_hid_ids) == 0) { > + static const guid_t i2c_hid_guid = > + GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555, > + 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE); > + acpi_handle handle = ACPI_HANDLE(&client->dev); > + union acpi_object *obj; > + > + obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, > + ACPI_TYPE_INTEGER); > + if (obj) { > + dev_warn(&client->dev, "elants_i2c: This device appears to be an I2C-HID device, not binding\n"); No need for "elants_i2c" prefix as dev_warn already gives driver info I believe. > + ACPI_FREE(obj); > + return -ENODEV; > + } > + } > +#endif Could we tuck this away into "elants_acpi_is_hid_device" and have #ifdef protecting that and have a complementing stub? > + > if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { > dev_err(&client->dev, > "%s: i2c check functionality error\n", DEVICE_NAME); As a cleanup should probably drop device prefix from this message as well. Thanks.
Hi, On 3/2/21 8:42 PM, Dmitry Torokhov wrote: > On Tue, Mar 02, 2021 at 03:50:57PM +0100, Hans de Goede wrote: >> Several users have been reporting that elants_i2c gives several errors >> during probe and that their touchscreen does not work on their Lenovo AMD >> based laptops with a touchscreen with a ELAN0001 ACPI hardware-id: >> >> [ 0.550596] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vcc33 not found, using dummy regulator >> [ 0.551836] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vccio not found, using dummy regulator >> [ 0.560932] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 >> [ 0.562427] elants_i2c i2c-ELAN0001:00: software reset failed: -121 >> [ 0.595925] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 >> [ 0.597974] elants_i2c i2c-ELAN0001:00: software reset failed: -121 >> [ 0.621893] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 >> [ 0.622504] elants_i2c i2c-ELAN0001:00: software reset failed: -121 >> [ 0.632650] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (4d 61 69 6e): -121 >> [ 0.634256] elants_i2c i2c-ELAN0001:00: boot failed: -121 >> [ 0.699212] elants_i2c i2c-ELAN0001:00: invalid 'hello' packet: 00 00 ff ff >> [ 1.630506] elants_i2c i2c-ELAN0001:00: Failed to read fw id: -121 >> [ 1.645508] elants_i2c i2c-ELAN0001:00: unknown packet 00 00 ff ff >> >> Despite these errors, the elants_i2c driver stays bound to the device >> (it returns 0 from its probe method despite the errors), blocking the >> i2c-hid driver from binding. >> >> Manually unbinding the elants_i2c driver and binding the i2c-hid driver >> makes the touchscreen work. >> >> Check if the ACPI-fwnode for the touchscreen contains one of the i2c-hid >> compatiblity-id strings and if it has the I2C-HID spec's DSM to get the >> HID descriptor address, If it has both then make elants_i2c not bind, >> so that the i2c-hid driver can bind. >> >> This assumes that non of the (older) elan touchscreens which actually >> need the elants_i2c driver falsely advertise an i2c-hid compatiblity-id >> + DSM in their ACPI-fwnodes. If some of them actually do have this >> false advertising, then this change may lead to regressions. >> >> Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> >> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207759 >> Signed-off-by: Hans de Goede <hdegoede@redhat.com> >> --- >> drivers/input/touchscreen/elants_i2c.c | 25 +++++++++++++++++++++++++ >> 1 file changed, 25 insertions(+) >> >> diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c >> index 4c2b579f6c8b..510638e5ba5a 100644 >> --- a/drivers/input/touchscreen/elants_i2c.c >> +++ b/drivers/input/touchscreen/elants_i2c.c >> @@ -1334,6 +1334,12 @@ static void elants_i2c_power_off(void *_data) >> } >> } >> >> +static const struct acpi_device_id i2c_hid_ids[] = { >> + {"ACPI0C50", 0 }, >> + {"PNP0C50", 0 }, >> + { }, >> +}; > > This ideally needs to be protected by CONFIG_ACPI. > >> + >> static int elants_i2c_probe(struct i2c_client *client, >> const struct i2c_device_id *id) >> { >> @@ -1342,6 +1348,25 @@ static int elants_i2c_probe(struct i2c_client *client, >> unsigned long irqflags; >> int error; >> >> +#ifdef CONFIG_ACPI >> + /* Don't bind to i2c-hid compatible devices, these are handled by the i2c-hid drv. */ >> + if (acpi_match_device_ids(ACPI_COMPANION(&client->dev), i2c_hid_ids) == 0) { >> + static const guid_t i2c_hid_guid = >> + GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555, >> + 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE); >> + acpi_handle handle = ACPI_HANDLE(&client->dev); >> + union acpi_object *obj; >> + >> + obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, >> + ACPI_TYPE_INTEGER); >> + if (obj) { >> + dev_warn(&client->dev, "elants_i2c: This device appears to be an I2C-HID device, not binding\n"); > > No need for "elants_i2c" prefix as dev_warn already gives driver info I > believe. Right, I will fix this for v2. > >> + ACPI_FREE(obj); >> + return -ENODEV; >> + } >> + } >> +#endif > > Could we tuck this away into "elants_acpi_is_hid_device" and have #ifdef > protecting that and have a complementing stub? That is a good idea, I'll do that for v2. > >> + >> if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { >> dev_err(&client->dev, >> "%s: i2c check functionality error\n", DEVICE_NAME); > > As a cleanup should probably drop device prefix from this message as > well. Ack. Regards, Hans
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c index 4c2b579f6c8b..510638e5ba5a 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -1334,6 +1334,12 @@ static void elants_i2c_power_off(void *_data) } } +static const struct acpi_device_id i2c_hid_ids[] = { + {"ACPI0C50", 0 }, + {"PNP0C50", 0 }, + { }, +}; + static int elants_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1342,6 +1348,25 @@ static int elants_i2c_probe(struct i2c_client *client, unsigned long irqflags; int error; +#ifdef CONFIG_ACPI + /* Don't bind to i2c-hid compatible devices, these are handled by the i2c-hid drv. */ + if (acpi_match_device_ids(ACPI_COMPANION(&client->dev), i2c_hid_ids) == 0) { + static const guid_t i2c_hid_guid = + GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555, + 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE); + acpi_handle handle = ACPI_HANDLE(&client->dev); + union acpi_object *obj; + + obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, + ACPI_TYPE_INTEGER); + if (obj) { + dev_warn(&client->dev, "elants_i2c: This device appears to be an I2C-HID device, not binding\n"); + ACPI_FREE(obj); + return -ENODEV; + } + } +#endif + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { dev_err(&client->dev, "%s: i2c check functionality error\n", DEVICE_NAME);
Several users have been reporting that elants_i2c gives several errors during probe and that their touchscreen does not work on their Lenovo AMD based laptops with a touchscreen with a ELAN0001 ACPI hardware-id: [ 0.550596] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vcc33 not found, using dummy regulator [ 0.551836] elants_i2c i2c-ELAN0001:00: i2c-ELAN0001:00 supply vccio not found, using dummy regulator [ 0.560932] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 [ 0.562427] elants_i2c i2c-ELAN0001:00: software reset failed: -121 [ 0.595925] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 [ 0.597974] elants_i2c i2c-ELAN0001:00: software reset failed: -121 [ 0.621893] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (77 77 77 77): -121 [ 0.622504] elants_i2c i2c-ELAN0001:00: software reset failed: -121 [ 0.632650] elants_i2c i2c-ELAN0001:00: elants_i2c_send failed (4d 61 69 6e): -121 [ 0.634256] elants_i2c i2c-ELAN0001:00: boot failed: -121 [ 0.699212] elants_i2c i2c-ELAN0001:00: invalid 'hello' packet: 00 00 ff ff [ 1.630506] elants_i2c i2c-ELAN0001:00: Failed to read fw id: -121 [ 1.645508] elants_i2c i2c-ELAN0001:00: unknown packet 00 00 ff ff Despite these errors, the elants_i2c driver stays bound to the device (it returns 0 from its probe method despite the errors), blocking the i2c-hid driver from binding. Manually unbinding the elants_i2c driver and binding the i2c-hid driver makes the touchscreen work. Check if the ACPI-fwnode for the touchscreen contains one of the i2c-hid compatiblity-id strings and if it has the I2C-HID spec's DSM to get the HID descriptor address, If it has both then make elants_i2c not bind, so that the i2c-hid driver can bind. This assumes that non of the (older) elan touchscreens which actually need the elants_i2c driver falsely advertise an i2c-hid compatiblity-id + DSM in their ACPI-fwnodes. If some of them actually do have this false advertising, then this change may lead to regressions. Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207759 Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- drivers/input/touchscreen/elants_i2c.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)