V4L/DVB: IR: NECX: support repeat

This adds support for repeat detecting for NECX variant
Tested with uneversal remote

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 23 insertions, 2 deletions

diff --git a/drivers/media/IR/ir-core-priv.h b/drivers/media/IR/ir-core-priv.h
index 84c7a9a5cad4..502d477b391c 100644
--- a/drivers/media/IR/ir-core-priv.h
+++ b/drivers/media/IR/ir-core-priv.h
@@ -45,6 +45,8 @@ struct ir_raw_event_ctrl {
                 int state;
                 unsigned count;
                 u32 bits;
+                bool is_nec_x;
+                bool necx_repeat;
         } nec;
         struct rc5_dec {
                 int state;
diff --git a/drivers/media/IR/ir-nec-decoder.c b/drivers/media/IR/ir-nec-decoder.c
index 1c0cf0300d2d..d597421d6547 100644
--- a/drivers/media/IR/ir-nec-decoder.c
+++ b/drivers/media/IR/ir-nec-decoder.c
@@ -26,6 +26,7 @@
 #define NEC_BIT_1_SPACE         (3  * NEC_UNIT)
 #define NEC_TRAILER_PULSE       (1  * NEC_UNIT)
 #define NEC_TRAILER_SPACE       (10 * NEC_UNIT) /* even longer in reality */
+#define NECX_REPEAT_BITS        1
 
 enum nec_state {
         STATE_INACTIVE,
@@ -67,8 +68,12 @@ static int ir_nec_decode(struct input_dev *input_dev, struct ir_raw_event ev)
                 if (!ev.pulse)
                         break;
 
-                if (!eq_margin(ev.duration, NEC_HEADER_PULSE, NEC_UNIT / 2) &&
-                    !eq_margin(ev.duration, NECX_HEADER_PULSE, NEC_UNIT / 2))
+                if (eq_margin(ev.duration, NEC_HEADER_PULSE, NEC_UNIT / 2)) {
+                        data->is_nec_x = false;
+                        data->necx_repeat = false;
+                } else if (eq_margin(ev.duration, NECX_HEADER_PULSE, NEC_UNIT / 2))
+                        data->is_nec_x = true;
+                else
                         break;
 
                 data->count = 0;
@@ -105,6 +110,17 @@ static int ir_nec_decode(struct input_dev *input_dev, struct ir_raw_event ev)
                 if (ev.pulse)
                         break;
 
+                if (data->necx_repeat && data->count == NECX_REPEAT_BITS &&
+                        geq_margin(ev.duration,
+                        NEC_TRAILER_SPACE, NEC_UNIT / 2)) {
+                                IR_dprintk(1, "Repeat last key\n");
+                                ir_repeat(input_dev);
+                                data->state = STATE_INACTIVE;
+                                return 0;
+
+                } else if (data->count > NECX_REPEAT_BITS)
+                        data->necx_repeat = false;
+
                 data->bits <<= 1;
                 if (eq_margin(ev.duration, NEC_BIT_1_SPACE, NEC_UNIT / 2))
                         data->bits |= 1;
@@ -159,6 +175,9 @@ static int ir_nec_decode(struct input_dev *input_dev, struct ir_raw_event ev)
                         IR_dprintk(1, "NEC scancode 0x%04x\n", scancode);
                 }
 
+                if (data->is_nec_x)
+                        data->necx_repeat = true;
+
                 ir_keydown(input_dev, scancode, 0);
                 data->state = STATE_INACTIVE;
                 return 0;