[PATCH 2/3] input: Add SW_UNSUPPORT_INSERT define

[PATCH 2/3] input: Add SW_UNSUPPORT_INSERT define

[bgoswami]

From: Banajit Goswami <bgoswami@codeaurora.org>

Some devices may not support specific type of input devices. For example,
when a headset or extension cable with GND/MIC swap is plugged into a
headset jack that does not support the headset/cable, it needs to be
reported with a corresponding input event. Also, increase the max values
for INPUT_DEVICE_ID_SW_MAX and SW_MAX, to accommodate future extension of
the number of event.

Signed-off-by: Gopikrishnaiah Anandan <agopik@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
---
 include/linux/mod_devicetable.h        | 2 +-
 include/uapi/linux/input-event-codes.h | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 448621c..7586099 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -299,7 +299,7 @@ struct pcmcia_device_id {
 #define INPUT_DEVICE_ID_LED_MAX		0x0f
 #define INPUT_DEVICE_ID_SND_MAX		0x07
 #define INPUT_DEVICE_ID_FF_MAX		0x7f
-#define INPUT_DEVICE_ID_SW_MAX		0x0f
+#define INPUT_DEVICE_ID_SW_MAX		0x1f
 #define INPUT_DEVICE_ID_PROP_MAX	0x1f
 
 #define INPUT_DEVICE_ID_MATCH_BUS	1
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 85387c7..960fa86 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -808,7 +808,8 @@
 #define SW_LINEIN_INSERT	0x0d  /* set = inserted */
 #define SW_MUTE_DEVICE		0x0e  /* set = device disabled */
 #define SW_PEN_INSERTED		0x0f  /* set = pen inserted */
-#define SW_MAX			0x0f
+#define SW_UNSUPPORT_INSERT	0x10  /* set = unsupported device inserted */
+#define SW_MAX			0x1f
 #define SW_CNT			(SW_MAX+1)
 
 /*
-- 
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a Linux Foundation Collaborative Project

Re: [PATCH 2/3] input: Add SW_UNSUPPORT_INSERT define

[Dmitry Torokhov]

Hi Banajit,

On Fri, May 24, 2019 at 01:40:38PM -0700, bgoswami@codeaurora.org wrote:
> From: Banajit Goswami <bgoswami@codeaurora.org>
> 
> Some devices may not support specific type of input devices. For example,
> when a headset or extension cable with GND/MIC swap is plugged into a
> headset jack that does not support the headset/cable, it needs to be
> reported with a corresponding input event. Also, increase the max values
> for INPUT_DEVICE_ID_SW_MAX and SW_MAX, to accommodate future extension of
> the number of event.

I do not think that adding this switch is a good idea as it will not
allow you to easily extend the reporting and to convey to the user why
something is not supported. I would look into alternate mechanism to
signal when and why a headset/peripheral was rejected.

Thanks.

-- 
Dmitry