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Integrating patch to fix iMon Knob Pad

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On Raspberry Pi, the iMon Knob Pad is totally unusable, either in mouse
or keyboard, because of a bug in the driver that misinterprets relative
movements to simulate the mouse or key presses. The patch has been
proposed upstream.
This commit is contained in:
lissyx 2012-09-02 22:41:52 +02:00
parent 1355da624e
commit 3b5020c880
1 changed files with 59 additions and 0 deletions
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59
packages/linux/patches/linux-3.2.28-999-fix-iMon-Knob-event-interpretation-issues.patch Normal file
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@ -0,0 +1,59 @@
From cca7718a9902a4d5cffbf158b5853980a08ef930 Mon Sep 17 00:00:00 2001
From: Alexandre Lissy <alexandrelissy@free.fr>
Date: Sun, 2 Sep 2012 20:35:20 +0200
Subject: [PATCH] fix: iMon Knob event interpretation issues
Events for the iMon Knob pad where not correctly interpreted, resulting
in buggy mouse movements (cursor going straight out of the screen), key
pad only generating KEY_RIGHT and KEY_DOWN events. A reproducer is:
int main(int argc, char ** argv)
{
char rel_x = 0x00; printf("rel_x:%d @%s:%d\n", rel_x, __FILE__, __LINE__);
rel_x = 0x0f; printf("rel_x:%d @%s:%d\n", rel_x, __FILE__, __LINE__);
rel_x |= ~0x0f; printf("rel_x:%d @%s:%d\n", rel_x, __FILE__, __LINE__);
return 0;
}
(running on x86 or amd64)
$ ./test
rel_x:0 @test.c:6
rel_x:15 @test.c:7
rel_x:-1 @test.c:8
(running on armv6)
rel_x:0 @test.c:6
rel_x:15 @test.c:7
rel_x:255 @test.c:8
Forcing the rel_x and rel_y variables as signed char fixes the issue.
---
drivers/media/rc/imon.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c
index 5dd0386..9d30ca9 100644
--- a/drivers/media/rc/imon.c
+++ b/drivers/media/rc/imon.c
@@ -1225,7 +1225,7 @@ static u32 imon_panel_key_lookup(u64 code)
static bool imon_mouse_event(struct imon_context *ictx,
unsigned char *buf, int len)
{
- char rel_x = 0x00, rel_y = 0x00;
+ signed char rel_x = 0x00, rel_y = 0x00;
u8 right_shift = 1;
bool mouse_input = true;
int dir = 0;
@@ -1301,7 +1301,7 @@ static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
{
int dir = 0;
- char rel_x = 0x00, rel_y = 0x00;
+ signed char rel_x = 0x00, rel_y = 0x00;
u16 timeout, threshold;
u32 scancode = KEY_RESERVED;
unsigned long flags;
--
1.7.9.5