Re: [PATCH 3/3] Input: synaptics-rmi4 - forward upper mechanical buttons to PS/2 guest

From: Dmitry Torokhov
Date: Thu Feb 09 2017 - 16:29:46 EST

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On Thu, Feb 09, 2017 at 09:48:09PM +0100, Benjamin Tissoires wrote:
> On Feb 09 2017 or thereabouts, Dmitry Torokhov wrote:
> > From: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
> >
> > On the latest series of ThinkPads, the button events for the TrackPoint
> > are reported through the touchpad itself as opposed to the TrackPoint
> > device. In order to report these buttons properly, we need to forward
> > them to the TrackPoint device and notify psmouse to send the button
> > presses/releases.
> >
> > Signed-off-by: Lyude Paul <thatslyude@xxxxxxxxx>
> > Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
> > Patchwork-Id: 9560561
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
> > ---
>
> Hi Dmitry,
>
> thanks for the follow up on this series.
>
> I had to add the following hunk to this patch for the buttons to
> actually be forwarded:
>
> diff --git a/drivers/input/rmi4/rmi_f30.c b/drivers/input/rmi4/rmi_f30.c
> index 938d31e..3422464 100644
> --- a/drivers/input/rmi4/rmi_f30.c
> +++ b/drivers/input/rmi4/rmi_f30.c
> @@ -151,10 +151,13 @@ static int rmi_f30_attention(struct rmi_function *fn, unsigned long *irq_bits)
> }
> }
>
> - if (f30->has_gpio)
> + if (f30->has_gpio) {
> for (i = 0; i < f30->gpioled_count; i++)
> if (f30->gpioled_key_map[i] != KEY_RESERVED)
> rmi_f30_report_button(fn, f30, i);
> + if (f30->trackstick_buttons)
> + rmi_f03_commit_buttons(f30->f03);
> + }
>
> return 0;
> }
> ---
>
> With this hunk added, I tested the series with the synaptics PS/2 path
> and SMBus on a t450s, and the i2c-hid path on a development touchpad.
> All seem to behave well:
>
> Tested-By: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>

Thank you Benjamin, I adjusted and pushed.

>
> Cheers,
> Benjamin
>
> > drivers/input/rmi4/rmi_driver.h | 13 ++++++++++
> > drivers/input/rmi4/rmi_f03.c | 38 ++++++++++++++++++++++++++++
> > drivers/input/rmi4/rmi_f30.c | 55 ++++++++++++++++++++++++++++++-----------
> > 3 files changed, 91 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/input/rmi4/rmi_driver.h b/drivers/input/rmi4/rmi_driver.h
> > index 6e0449cdca68..f1a2a2266022 100644
> > --- a/drivers/input/rmi4/rmi_driver.h
> > +++ b/drivers/input/rmi4/rmi_driver.h
> > @@ -107,6 +107,19 @@ int rmi_initial_reset(struct rmi_device *rmi_dev, void *ctx,
> >
> > const char *rmi_f01_get_product_ID(struct rmi_function *fn);
> >
> > +#ifdef CONFIG_RMI4_F03
> > +int rmi_f03_overwrite_button(struct rmi_function *fn, unsigned int button,
> > + int value);
> > +void rmi_f03_commit_buttons(struct rmi_function *fn);
> > +#else
> > +static inline int rmi_f03_overwrite_button(struct rmi_function *fn,
> > + unsigned int button, int value)
> > +{
> > + return 0;
> > +}
> > +static inline void rmi_f03_commit_buttons(struct rmi_function *fn) {}
> > +#endif
> > +
> > #ifdef CONFIG_RMI4_F34
> > int rmi_f34_create_sysfs(struct rmi_device *rmi_dev);
> > void rmi_f34_remove_sysfs(struct rmi_device *rmi_dev);
> > diff --git a/drivers/input/rmi4/rmi_f03.c b/drivers/input/rmi4/rmi_f03.c
> > index 9a1b099b72e0..77dad045a468 100644
> > --- a/drivers/input/rmi4/rmi_f03.c
> > +++ b/drivers/input/rmi4/rmi_f03.c
> > @@ -26,15 +26,53 @@
> > #define RMI_F03_BYTES_PER_DEVICE_SHIFT 4
> > #define RMI_F03_QUEUE_LENGTH 0x0F
> >
> > +#define PSMOUSE_OOB_EXTRA_BTNS 0x01
> > +
> > struct f03_data {
> > struct rmi_function *fn;
> >
> > struct serio *serio;
> >
> > + unsigned int overwrite_buttons;
> > +
> > u8 device_count;
> > u8 rx_queue_length;
> > };
> >
> > +int rmi_f03_overwrite_button(struct rmi_function *fn, unsigned int button,
> > + int value)
> > +{
> > + struct f03_data *f03 = dev_get_drvdata(&fn->dev);
> > + unsigned int bit;
> > +
> > + if (button < BTN_LEFT || button > BTN_MIDDLE)
> > + return -EINVAL;
> > +
> > + bit = BIT(button - BTN_LEFT);
> > +
> > + if (value)
> > + f03->overwrite_buttons |= bit;
> > + else
> > + f03->overwrite_buttons &= ~bit;
> > +
> > + return 0;
> > +}
> > +
> > +void rmi_f03_commit_buttons(struct rmi_function *fn)
> > +{
> > + struct f03_data *f03 = dev_get_drvdata(&fn->dev);
> > + struct serio *serio = f03->serio;
> > +
> > + serio_pause_rx(serio);
> > + if (serio->drv) {
> > + serio->drv->interrupt(serio, PSMOUSE_OOB_EXTRA_BTNS,
> > + SERIO_OOB_DATA);
> > + serio->drv->interrupt(serio, f03->overwrite_buttons,
> > + SERIO_OOB_DATA);
> > + }
> > + serio_continue_rx(serio);
> > +}
> > +
> > static int rmi_f03_pt_write(struct serio *id, unsigned char val)
> > {
> > struct f03_data *f03 = id->port_data;
> > diff --git a/drivers/input/rmi4/rmi_f30.c b/drivers/input/rmi4/rmi_f30.c
> > index c5eb4d034e84..938d31eea19a 100644
> > --- a/drivers/input/rmi4/rmi_f30.c
> > +++ b/drivers/input/rmi4/rmi_f30.c
> > @@ -48,6 +48,9 @@
> > + 1 \
> > + 1)
> >
> > +#define TRACKSTICK_RANGE_START 3
> > +#define TRACKSTICK_RANGE_END 6
> > +
> > struct rmi_f30_ctrl_data {
> > int address;
> > int length;
> > @@ -76,6 +79,9 @@ struct f30_data {
> > u16 *gpioled_key_map;
> >
> > struct input_dev *input;
> > +
> > + struct rmi_function *f03;
> > + bool trackstick_buttons;
> > };
> >
> > static int rmi_f30_read_control_parameters(struct rmi_function *fn,
> > @@ -100,13 +106,20 @@ static void rmi_f30_report_button(struct rmi_function *fn,
> > {
> > unsigned int reg_num = button >> 3;
> > unsigned int bit_num = button & 0x07;
> > + u16 key_code = f30->gpioled_key_map[button];
> > bool key_down = !(f30->data_regs[reg_num] & BIT(bit_num));
> >
> > - rmi_dbg(RMI_DEBUG_FN, &fn->dev,
> > - "%s: call input report key (0x%04x) value (0x%02x)",
> > - __func__, f30->gpioled_key_map[button], key_down);
> > + if (f30->trackstick_buttons &&
> > + button >= TRACKSTICK_RANGE_START &&
> > + button <= TRACKSTICK_RANGE_END) {
> > + rmi_f03_overwrite_button(f30->f03, key_code, key_down);
> > + } else {
> > + rmi_dbg(RMI_DEBUG_FN, &fn->dev,
> > + "%s: call input report key (0x%04x) value (0x%02x)",
> > + __func__, key_code, key_down);
> >
> > - input_report_key(f30->input, f30->gpioled_key_map[button], key_down);
> > + input_report_key(f30->input, key_code, key_down);
> > + }
> > }
> >
> > static int rmi_f30_attention(struct rmi_function *fn, unsigned long *irq_bits)
> > @@ -154,6 +167,12 @@ static int rmi_f30_config(struct rmi_function *fn)
> > rmi_get_platform_data(fn->rmi_dev);
> > int error;
> >
> > + if (pdata->f30_data.trackstick_buttons) {
> > + /* Try [re-]establish link to F03. */
> > + f30->f03 = rmi_find_function(fn->rmi_dev, 0x03);
> > + f30->trackstick_buttons = f30->f03 != NULL;
> > + }
> > +
> > if (pdata->f30_data.disable) {
> > drv->clear_irq_bits(fn->rmi_dev, fn->irq_mask);
> > } else {
> > @@ -203,6 +222,8 @@ static int rmi_f30_map_gpios(struct rmi_function *fn,
> > rmi_get_platform_data(fn->rmi_dev);
> > struct input_dev *input = f30->input;
> > unsigned int button = BTN_LEFT;
> > + unsigned int trackstick_button = BTN_LEFT;
> > + bool button_mapped = false;
> > int i;
> >
> > f30->gpioled_key_map = devm_kcalloc(&fn->dev,
> > @@ -215,19 +236,16 @@ static int rmi_f30_map_gpios(struct rmi_function *fn,
> > }
> >
> > for (i = 0; i < f30->gpioled_count; i++) {
> > - if (rmi_f30_is_valid_button(i, f30->ctrl)) {
> > + if (!rmi_f30_is_valid_button(i, f30->ctrl))
> > + continue;
> > +
> > + if (pdata->f30_data.trackstick_buttons &&
> > + i >= TRACKSTICK_RANGE_START && i < TRACKSTICK_RANGE_END) {
> > + f30->gpioled_key_map[i] = trackstick_button++;
> > + } else if (!pdata->f30_data.buttonpad || !button_mapped) {
> > f30->gpioled_key_map[i] = button;
> > input_set_capability(input, EV_KEY, button++);
> > -
> > - /*
> > - * buttonpad might be given by
> > - * f30->has_mech_mouse_btns, but I am
> > - * not sure, so use only the pdata info
> > - */
> > - if (pdata->f30_data.buttonpad) {
> > - __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
> > - break;
> > - }
> > + button_mapped = true;
> > }
> > }
> >
> > @@ -235,6 +253,13 @@ static int rmi_f30_map_gpios(struct rmi_function *fn,
> > input->keycodesize = sizeof(f30->gpioled_key_map[0]);
> > input->keycodemax = f30->gpioled_count;
> >
> > + /*
> > + * Buttonpad could be also inferred from f30->has_mech_mouse_btns,
> > + * but I am not sure, so use only the pdata info.
> > + */
> > + if (pdata->f30_data.buttonpad)
> > + __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
> > +
> > return 0;
> > }
> >
> > --
> > 2.11.0.483.g087da7b7c-goog
> >

--
Dmitry

Next message: Richard Weinberger: "[PATCH 2/4] ubifs: Fix unlink code wrt. double hash lookups"
Previous message: Richard Weinberger: "[PATCH 3/4] ubifs: Add assert to dent_key_init()"
In reply to: Benjamin Tissoires: "Re: [PATCH 3/3] Input: synaptics-rmi4 - forward upper mechanical buttons to PS/2 guest"
Next in thread: Dmitry Torokhov: "[PATCH 2/3] Input: synaptics-rmi4 - clean up F30 implementation"
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