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SubjectRe: [PATCH] platform/x86: fujitsu-laptop: Simplify soft key handling
On Thu, Mar 22, 2018 at 06:27:16PM -0700, Darren Hart (VMware) wrote:
> The hardcoded BIT(X) used in the soft key handling can be confusing and
> prone to errors.
>
> Instead, use the status FLAG_* defines for the sparse keymap index.
> Rather than check for each known bit, use a bitmask to filter for all
> known soft keys, and use the for_each_set_bit iterator.

I agree.

Reviewed-by: Jonathan Woithe <jwoithe@just42.net>

Regards
jonathan

> Cc: Jan-Marek Glogowski <glogow@fbihome.de>
> Cc: Micha?? K??pie?? <kernel@kempniu.pl>
> Cc: Jonathan Woithe <jwoithe@just42.net>
> Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
> ---
>
> Note: this applies on top of Jan-Marek's recent RFKILL and MICMUTE hotkey patch.
> I'd really appreciate a Tested-by from Jan-Marek in particular. You can get the
> entire series ready for testing here:
>
> http://git.infradead.org/linux-platform-drivers-x86.git/shortlog/refs/heads/review-dvhart-fujitsu
>
> Also wondering if LID and DOCK might benefit from an input event...
>
> drivers/platform/x86/fujitsu-laptop.c | 47 ++++++++++++++++++-----------------
> 1 file changed, 24 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
> index cd95b6f3a064..6afeaece2f50 100644
> --- a/drivers/platform/x86/fujitsu-laptop.c
> +++ b/drivers/platform/x86/fujitsu-laptop.c
> @@ -91,6 +91,9 @@
> #define FLAG_RFKILL BIT(5)
> #define FLAG_LID BIT(8)
> #define FLAG_DOCK BIT(9)
> +#define FLAG_TOUCHPAD_TOGGLE BIT(26)
> +#define FLAG_MICMUTE BIT(29)
> +#define FLAG_SOFTKEYS (FLAG_RFKILL | FLAG_TOUCHPAD_TOGGLE | FLAG_MICMUTE)
>
> /* FUNC interface - LED control */
> #define FUNC_LED_OFF BIT(0)
> @@ -456,14 +459,15 @@ static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
> /* ACPI device for hotkey handling */
>
> static const struct key_entry keymap_default[] = {
> - { KE_KEY, KEY1_CODE, { KEY_PROG1 } },
> - { KE_KEY, KEY2_CODE, { KEY_PROG2 } },
> - { KE_KEY, KEY3_CODE, { KEY_PROG3 } },
> - { KE_KEY, KEY4_CODE, { KEY_PROG4 } },
> - { KE_KEY, KEY5_CODE, { KEY_RFKILL } },
> - { KE_KEY, BIT(5), { KEY_RFKILL } },
> - { KE_KEY, BIT(26), { KEY_TOUCHPAD_TOGGLE } },
> - { KE_KEY, BIT(29), { KEY_MICMUTE } },
> + { KE_KEY, KEY1_CODE, { KEY_PROG1 } },
> + { KE_KEY, KEY2_CODE, { KEY_PROG2 } },
> + { KE_KEY, KEY3_CODE, { KEY_PROG3 } },
> + { KE_KEY, KEY4_CODE, { KEY_PROG4 } },
> + { KE_KEY, KEY5_CODE, { KEY_RFKILL } },
> + /* Soft keys read from status flags */
> + { KE_KEY, FLAG_RFKILL, { KEY_RFKILL } },
> + { KE_KEY, FLAG_TOUCHPAD_TOGGLE, { KEY_TOUCHPAD_TOGGLE } },
> + { KE_KEY, FLAG_MICMUTE, { KEY_MICMUTE } },
> { KE_END, 0 }
> };
>
> @@ -903,7 +907,8 @@ static void acpi_fujitsu_laptop_release(struct acpi_device *device)
> static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
> {
> struct fujitsu_laptop *priv = acpi_driver_data(device);
> - int scancode, i = 0, ret;
> + unsigned long flags;
> + int scancode, i = 0;
> unsigned int irb;
>
> if (event != ACPI_FUJITSU_NOTIFY_CODE) {
> @@ -930,21 +935,17 @@ static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
> "Unknown GIRB result [%x]\n", irb);
> }
>
> - /* On some models (first seen on the Skylake-based Lifebook
> - * E736/E746/E756), the touchpad toggle hotkey (Fn+F4) is
> - * handled in software; its state is queried using FUNC_FLAGS
> + /*
> + * First seen on the Skylake-based Lifebook E736/E746/E756), the
> + * touchpad toggle hotkey (Fn+F4) is handled in software. Other models
> + * have since added additional "soft keys". These are reported in the
> + * status flags queried using FUNC_FLAGS.
> */
> - if (priv->flags_supported & (BIT(5) | BIT(26) | BIT(29))) {
> - ret = call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0);
> - if (ret & BIT(5))
> - sparse_keymap_report_event(priv->input,
> - BIT(5), 1, true);
> - if (ret & BIT(26))
> - sparse_keymap_report_event(priv->input,
> - BIT(26), 1, true);
> - if (ret & BIT(29))
> - sparse_keymap_report_event(priv->input,
> - BIT(29), 1, true);
> + if (priv->flags_supported & (FLAG_SOFTKEYS)) {
> + flags = call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0);
> + flags &= (FLAG_SOFTKEYS);
> + for_each_set_bit(i, &flags, BITS_PER_LONG)
> + sparse_keymap_report_event(priv->input, BIT(i), 1, true);
> }
> }
>
> --
> 2.14.3
>
>
> --
> Darren Hart
> VMware Open Source Technology Center

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