Re: [PATCH v2] platform/x86: intel-hid: Add support for Device Specific Methods

From: Andy Shevchenko
Date: Mon Jul 02 2018 - 08:41:23 EST

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On Fri, Jun 29, 2018 at 9:41 PM, Srinivas Pandruvada
<srinivas.pandruvada@xxxxxxxxxxxxxxx> wrote:
> On Fri, 2018-06-29 at 16:44 +0000, Mario.Limonciello@xxxxxxxx wrote:
>> >
>
> [...]
>
>> I verified this on XPS 9370 FW 1.3.2 (which contains this alternate
>> HEBC interface).
>> Power button works again for wakeup from s2idle.
>>
>> Tested-by: Mario Limonciello <mario.limonciello@xxxxxxxx>
>>
> So there are some customers who will have issue with power button
> without this patch, so it should be also marked for stable also.
> Also this may be a candidate for 4.18-rcX.
>

I'm not sure Greg will take this selling point for rather big patch.
>From changelog, honestly, I don't see any regression description,
looks like "it wasn't working before change anyway".

For now, I pushed this to my review and testing queue as is, thanks!

> Thanks,
> Srinivas
>
>> > ---
>> > Accidently sent the patch without change of version, so please
>> > ignore
>> > the previous one sent today.
>> > v2:
>> > Minor changes suggested by Andy
>> >
>> > drivers/platform/x86/intel-hid.c | 178
>> > ++++++++++++++++++++++++++++++++++----
>> > -
>> > 1 file changed, 157 insertions(+), 21 deletions(-)
>> >
>> > diff --git a/drivers/platform/x86/intel-hid.c
>> > b/drivers/platform/x86/intel-hid.c
>> > index b5adba227783..6cf9b7fa5bf0 100644
>> > --- a/drivers/platform/x86/intel-hid.c
>> > +++ b/drivers/platform/x86/intel-hid.c
>> > @@ -96,13 +96,140 @@ struct intel_hid_priv {
>> > bool wakeup_mode;
>> > };
>> >
>> > -static int intel_hid_set_enable(struct device *device, bool
>> > enable)
>> > +#define HID_EVENT_FILTER_UUID "eeec56b3-4442-408f-a792-
>> > 4edd4d758054"
>> > +
>> > +enum intel_hid_dsm_fn_codes {
>> > + INTEL_HID_DSM_FN_INVALID,
>> > + INTEL_HID_DSM_BTNL_FN,
>> > + INTEL_HID_DSM_HDMM_FN,
>> > + INTEL_HID_DSM_HDSM_FN,
>> > + INTEL_HID_DSM_HDEM_FN,
>> > + INTEL_HID_DSM_BTNS_FN,
>> > + INTEL_HID_DSM_BTNE_FN,
>> > + INTEL_HID_DSM_HEBC_V1_FN,
>> > + INTEL_HID_DSM_VGBS_FN,
>> > + INTEL_HID_DSM_HEBC_V2_FN,
>> > + INTEL_HID_DSM_FN_MAX
>> > +};
>> > +
>> > +static const char
>> > *intel_hid_dsm_fn_to_method[INTEL_HID_DSM_FN_MAX] = {
>> > + NULL,
>> > + "BTNL",
>> > + "HDMM",
>> > + "HDSM",
>> > + "HDEM",
>> > + "BTNS",
>> > + "BTNE",
>> > + "HEBC",
>> > + "VGBS",
>> > + "HEBC"
>> > +};
>> > +
>> > +static unsigned long long intel_hid_dsm_fn_mask;
>> > +static guid_t intel_dsm_guid;
>> > +
>> > +static bool intel_hid_execute_method(acpi_handle handle,
>> > + enum intel_hid_dsm_fn_codes
>> > fn_index,
>> > + unsigned long long arg)
>> > {
>> > + union acpi_object *obj, argv4, req;
>> > acpi_status status;
>> > + char *method_name;
>> >
>> > - status = acpi_execute_simple_method(ACPI_HANDLE(device),
>> > "HDSM",
>> > - enable);
>> > - if (ACPI_FAILURE(status)) {
>> > + if (fn_index <= INTEL_HID_DSM_FN_INVALID ||
>> > + fn_index >= INTEL_HID_DSM_FN_MAX)
>> > + return false;
>> > +
>> > + method_name = (char
>> > *)intel_hid_dsm_fn_to_method[fn_index];
>> > +
>> > + if (!(intel_hid_dsm_fn_mask & fn_index))
>> > + goto skip_dsm_exec;
>> > +
>> > + /* All methods expects a package with one integer element
>> > */
>> > + req.type = ACPI_TYPE_INTEGER;
>> > + req.integer.value = arg;
>> > +
>> > + argv4.type = ACPI_TYPE_PACKAGE;
>> > + argv4.package.count = 1;
>> > + argv4.package.elements = &req;
>> > +
>> > + obj = acpi_evaluate_dsm(handle, &intel_dsm_guid, 1,
>> > fn_index, &argv4);
>> > + if (obj) {
>> > + acpi_handle_debug(handle, "Exec DSM Fn code:
>> > %d[%s]
>> > success\n",
>> > + fn_index, method_name);
>> > + ACPI_FREE(obj);
>> > + return true;
>> > + }
>> > +
>> > +skip_dsm_exec:
>> > + status = acpi_execute_simple_method(handle, method_name,
>> > arg);
>> > + if (ACPI_SUCCESS(status))
>> > + return true;
>> > +
>> > + return false;
>> > +}
>> > +
>> > +static bool intel_hid_evaluate_method(acpi_handle handle,
>> > + enum intel_hid_dsm_fn_codes
>> > fn_index,
>> > + unsigned long long *result)
>> > +{
>> > + union acpi_object *obj;
>> > + acpi_status status;
>> > + char *method_name;
>> > +
>> > + if (fn_index <= INTEL_HID_DSM_FN_INVALID ||
>> > + fn_index >= INTEL_HID_DSM_FN_MAX)
>> > + return false;
>> > +
>> > + method_name = (char
>> > *)intel_hid_dsm_fn_to_method[fn_index];
>> > +
>> > + if (!(intel_hid_dsm_fn_mask & fn_index))
>> > + goto skip_dsm_eval;
>> > +
>> > + obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid,
>> > + 1, fn_index,
>> > + NULL, ACPI_TYPE_INTEGER);
>> > + if (obj) {
>> > + *result = obj->integer.value;
>> > + acpi_handle_debug(handle,
>> > + "Eval DSM Fn code: %d[%s]
>> > results: 0x%llx\n",
>> > + fn_index, method_name, *result);
>> > + ACPI_FREE(obj);
>> > + return true;
>> > + }
>> > +
>> > +skip_dsm_eval:
>> > + status = acpi_evaluate_integer(handle, method_name, NULL,
>> > result);
>> > + if (ACPI_SUCCESS(status))
>> > + return true;
>> > +
>> > + return false;
>> > +}
>> > +
>> > +static void intel_hid_init_dsm(acpi_handle handle)
>> > +{
>> > + union acpi_object *obj;
>> > +
>> > + guid_parse(HID_EVENT_FILTER_UUID, &intel_dsm_guid);
>> > +
>> > + obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 1,
>> > 0, NULL,
>> > + ACPI_TYPE_BUFFER);
>> > + if (obj) {
>> > + intel_hid_dsm_fn_mask = *obj->buffer.pointer;
>> > + ACPI_FREE(obj);
>> > + }
>> > +
>> > + acpi_handle_debug(handle, "intel_hid_dsm_fn_mask =
>> > %llx\n",
>> > + intel_hid_dsm_fn_mask);
>> > +}
>> > +
>> > +static int intel_hid_set_enable(struct device *device, bool
>> > enable)
>> > +{
>> > + acpi_handle handle = ACPI_HANDLE(device);
>> > +
>> > + /* Enable|disable features - power button is always
>> > enabled */
>> > + if (!intel_hid_execute_method(handle,
>> > INTEL_HID_DSM_HDSM_FN,
>> > + enable)) {
>> > dev_warn(device, "failed to %sable hotkeys\n",
>> > enable ? "en" : "dis");
>> > return -EIO;
>> > @@ -129,9 +256,8 @@ static void intel_button_array_enable(struct
>> > device
>> > *device, bool enable)
>> > }
>> >
>> > /* Enable|disable features - power button is always
>> > enabled */
>> > - status = acpi_execute_simple_method(handle, "BTNE",
>> > - enable ? button_cap :
>> > 1);
>> > - if (ACPI_FAILURE(status))
>> > + if (!intel_hid_execute_method(handle,
>> > INTEL_HID_DSM_BTNE_FN,
>> > + enable ? button_cap : 1))
>> > dev_warn(device, "failed to set button
>> > capability\n");
>> > }
>> >
>> > @@ -217,7 +343,6 @@ static void notify_handler(acpi_handle handle,
>> > u32 event,
>> > void *context)
>> > struct platform_device *device = context;
>> > struct intel_hid_priv *priv = dev_get_drvdata(&device-
>> > >dev);
>> > unsigned long long ev_index;
>> > - acpi_status status;
>> >
>> > if (priv->wakeup_mode) {
>> > /*
>> > @@ -269,8 +394,8 @@ static void notify_handler(acpi_handle handle,
>> > u32 event,
>> > void *context)
>> > return;
>> > }
>> >
>> > - status = acpi_evaluate_integer(handle, "HDEM", NULL,
>> > &ev_index);
>> > - if (ACPI_FAILURE(status)) {
>> > + if (!intel_hid_evaluate_method(handle,
>> > INTEL_HID_DSM_HDEM_FN,
>> > + &ev_index)) {
>> > dev_warn(&device->dev, "failed to get event
>> > index\n");
>> > return;
>> > }
>> > @@ -284,17 +409,24 @@ static bool button_array_present(struct
>> > platform_device
>> > *device)
>> > {
>> > acpi_handle handle = ACPI_HANDLE(&device->dev);
>> > unsigned long long event_cap;
>> > - acpi_status status;
>> > - bool supported = false;
>> >
>> > - status = acpi_evaluate_integer(handle, "HEBC", NULL,
>> > &event_cap);
>> > - if (ACPI_SUCCESS(status) && (event_cap & 0x20000))
>> > - supported = true;
>> > + if (intel_hid_evaluate_method(handle,
>> > INTEL_HID_DSM_HEBC_V2_FN,
>> > + &event_cap)) {
>> > + /* Check presence of 5 button array or v2 power
>> > button */
>> > + if (event_cap & 0x60000)
>> > + return true;
>> > + }
>> > +
>> > + if (intel_hid_evaluate_method(handle,
>> > INTEL_HID_DSM_HEBC_V1_FN,
>> > + &event_cap)) {
>> > + if (event_cap & 0x20000)
>> > + return true;
>> > + }
>> >
>> > if (dmi_check_system(button_array_table))
>> > - supported = true;
>> > + return true;
>> >
>> > - return supported;
>> > + return false;
>> > }
>> >
>> > static int intel_hid_probe(struct platform_device *device)
>> > @@ -305,8 +437,9 @@ static int intel_hid_probe(struct
>> > platform_device *device)
>> > acpi_status status;
>> > int err;
>> >
>> > - status = acpi_evaluate_integer(handle, "HDMM", NULL,
>> > &mode);
>> > - if (ACPI_FAILURE(status)) {
>> > + intel_hid_init_dsm(handle);
>> > +
>> > + if (!intel_hid_evaluate_method(handle,
>> > INTEL_HID_DSM_HDMM_FN,
>> > &mode)) {
>> > dev_warn(&device->dev, "failed to read mode\n");
>> > return -ENODEV;
>> > }
>> > @@ -352,13 +485,16 @@ static int intel_hid_probe(struct
>> > platform_device
>> > *device)
>> > goto err_remove_notify;
>> >
>> > if (priv->array) {
>> > + unsigned long long dummy;
>> > +
>> > intel_button_array_enable(&device->dev, true);
>> >
>> > /* Call button load method to enable HID power
>> > button */
>> > - status = acpi_evaluate_object(handle, "BTNL",
>> > NULL, NULL);
>> > - if (ACPI_FAILURE(status))
>> > + if (!intel_hid_evaluate_method(handle,
>> > INTEL_HID_DSM_BTNL_FN,
>> > + &dummy)) {
>> > dev_warn(&device->dev,
>> > "failed to enable HID power
>> > button\n");
>> > + }
>> > }
>> >
>> > device_init_wakeup(&device->dev, true);
>> > --
>> > 2.14.1
>>
>>

--
With Best Regards,
Andy Shevchenko

Next message: Colin King: "[PATCH] pinctrl: actions: fix unsigned less than zero comparison"
Previous message: Christian KÃnig: "Re: [RFC PATCH] mm, oom: distinguish blockable mode for mmu notifiers"
Next in thread: Mario.Limonciello: "RE: [PATCH v2] platform/x86: intel-hid: Add support for Device Specific Methods"
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