On Fri, Jan 26, 2018 at 11:52 AM, Pali Rohár <pali.rohar@xxxxxxxxx> wrote:
> On Friday 26 January 2018 10:45:55 Marco Martin wrote:
>> On martedì 23 gennaio 2018 16:18:24 CET Marco Martin wrote:
>> > Some laptops such as Dell Inspiron 7000 series have the
>> > tablet mode switch implemented in Intel ACPI,
>> > the events to enter and exit the tablet mode are 0xCC and 0xCD
>> >
>> > CC: platform-driver-x86@xxxxxxxxxxxxxxx
>> > CC: Matthew Garrett <mjg59@xxxxxxxxxxxxx>
>> > CC: "Pali Rohár" <pali.rohar@xxxxxxxxx>
>> > CC: Darren Hart <dvhart@xxxxxxxxxxxxx>
>> > CC: Mario Limonciello <mario_limonciello@xxxxxxxx>
>> > CC: Andy Shevchenko <andy@xxxxxxxxxxxxx>
>> >
>> > Signed-off-by: Marco Martin <notmart@xxxxxxxxx>
>> > ---
>> > drivers/platform/x86/intel-vbtn.c | 21 +++++++++++++++++++++
>> > 1 file changed, 21 insertions(+)
>> >
>> > diff --git a/drivers/platform/x86/intel-vbtn.c
>> > b/drivers/platform/x86/intel-vbtn.c index 58c5ff3..64b4b34 100644
>> > --- a/drivers/platform/x86/intel-vbtn.c
>> > +++ b/drivers/platform/x86/intel-vbtn.c
>> > @@ -26,6 +26,9 @@
>> > #include <linux/suspend.h>
>> > #include <acpi/acpi_bus.h>
>> >
>> > +/* When NOT in tablet mode, VBDS has the flag 0x40 */
>> > +#define TABLET_MODE_FLAG 0x40
>> > +
>> > MODULE_LICENSE("GPL");
>> > MODULE_AUTHOR("AceLan Kao");
>> >
>> > @@ -42,6 +45,8 @@ static const struct key_entry intel_vbtn_keymap[] = {
>> > { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* volume-up key release */
>> > { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* volume-down key press */
>> > { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* volume-down key release */
>> > + { KE_SW, 0xCC, { .sw = { SW_TABLET_MODE, 1 } } }, /* Tablet mode in */
>> > + { KE_SW, 0xCD, { .sw = { SW_TABLET_MODE, 0 } } }, /* Tablet mode out */
>> > { KE_END },
>> > };
>> >
>> > @@ -88,6 +93,7 @@ static void notify_handler(acpi_handle handle, u32 event,
>> > void *context)
>> >
>> > static int intel_vbtn_probe(struct platform_device *device)
>> > {
>> > + struct acpi_buffer vgbs_output = { ACPI_ALLOCATE_BUFFER, NULL };
>> > acpi_handle handle = ACPI_HANDLE(&device->dev);
>> > struct intel_vbtn_priv *priv;
>> > acpi_status status;
>> > @@ -110,6 +116,21 @@ static int intel_vbtn_probe(struct platform_device
>> > *device) return err;
>> > }
>> >
>> > + status = acpi_evaluate_object(handle, "VGBS", NULL, &vgbs_output);
>> > + /* VGBS being present and returning something means
>> > + * we have a tablet mode switch
>> > + */
>> > + if (ACPI_SUCCESS(status)) {
>> > + union acpi_object *obj = vgbs_output.pointer;
>> > +
>> > + if (obj && obj->type == ACPI_TYPE_INTEGER) {
>> > + input_set_capability(priv->input_dev, EV_SW, SW_TABLET_MODE);
>> > + input_report_switch(priv->input_dev,
>> > + SW_TABLET_MODE,
>> > + !(obj->integer.value & TABLET_MODE_FLAG));
>> > + }
>> > + }
>> > +
>> > status = acpi_install_notify_handler(handle,
>> > ACPI_DEVICE_NOTIFY,
>> > notify_handler,
>>
>> Is there still something to change in this version of the patch?
>
> Yes, I already wrote it in thread for older patch version. Calling
> input_set_capability() is not needed at all because all capabilities are
> already set by sparse_keymap_setup() function.
ah, sorry, i somehow missed the answer.
Wouldn't this cause a problem tough? it was querying VGBS to add the
switch capability just conditionally
on models which actually have it, so now being in sparse_keymap, all
will have that switch available even if not there.
Now, if this is fine (after all that switch would never be triggered
on such hardware) i can go forward removing all of that so the patch
becomes a neat two-liner.
--
Marco Martin
