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SubjectRe: [PATCH v2] platform/x86: intel-vbtn: Report switch events when event wakes device
On Mon, May 20, 2019 at 4:41 PM Mathew King <mathewk@chromium.org> wrote:
>
> When a switch event, such as tablet mode/laptop mode or docked/undocked,
> wakes a device make sure that the value of the swich is reported.
> Without when a device is put in tablet mode from laptop mode when it is
> suspended or vice versa the device will wake up but mode will be
> incorrect.
>
> Tested by suspending a device in laptop mode and putting it in tablet
> mode, the device resumes and is in tablet mode. When suspending the
> device in tablet mode and putting it in laptop mode the device resumes
> and is in laptop mode.
>
> Signed-off-by: Mathew King <mathewk@chromium.org>
>
> ---
> Changes in v2:
> - Added comment explaining why switch events are reported
> - Format so that checkpatch is happy
> ---
> drivers/platform/x86/intel-vbtn.c | 16 ++++++++++++++--
> 1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c
> index 06cd7e818ed5..a0d0cecff55f 100644
> --- a/drivers/platform/x86/intel-vbtn.c
> +++ b/drivers/platform/x86/intel-vbtn.c
> @@ -76,12 +76,24 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
> struct platform_device *device = context;
> struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
> unsigned int val = !(event & 1); /* Even=press, Odd=release */
> - const struct key_entry *ke_rel;
> + const struct key_entry *ke, *ke_rel;
> bool autorelease;
>
> if (priv->wakeup_mode) {
> - if (sparse_keymap_entry_from_scancode(priv->input_dev, event)) {
> + ke = sparse_keymap_entry_from_scancode(priv->input_dev, event);
> + if (ke) {
> pm_wakeup_hard_event(&device->dev);
> +
> + /*
> + * Switch events like tablet mode will wake the device
> + * and report the new switch position to the input
> + * subsystem.
> + */
Thanks for adding the comment; This looks good to me.

> + if (ke->type == KE_SW)
> + sparse_keymap_report_event(priv->input_dev,
> + event,
> + val,
> + 0);
> return;
> }
> goto out_unknown;
> --
> 2.21.0.1020.gf2820cf01a-goog
>

Reviewed-by: Jett Rink <jettrink@chromium.org>

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