distribution/packages/kernel/linux/patches/raspberrypi/linux-904-improve-xbox-dvd-remote-performance.patch

From 55096db50d8cdbf777c67f672b493ef565a12c38 Mon Sep 17 00:00:00 2001
From: Matthias Reichl <hias@horus.com>
Date: Fri, 22 Mar 2019 12:26:17 +0100
Subject: [PATCH] media: rc: xbox_remote: add protocol and set timeout

The timestamps in ir-keytable -t output showed that the Xbox DVD
IR dongle decodes scancodes every 64ms. The last scancode of a
longer button press is decodes 64ms after the last-but-one which
indicates the decoder doesn't use a timeout but decodes on the last
edge of the signal.

267.042629: lirc protocol(unknown): scancode = 0xace
267.042665: event type EV_MSC(0x04): scancode = 0xace
267.042665: event type EV_KEY(0x01) key_down: KEY_1(0x0002)
267.042665: event type EV_SYN(0x00).
267.106625: lirc protocol(unknown): scancode = 0xace
267.106643: event type EV_MSC(0x04): scancode = 0xace
267.106643: event type EV_SYN(0x00).
267.170623: lirc protocol(unknown): scancode = 0xace
267.170638: event type EV_MSC(0x04): scancode = 0xace
267.170638: event type EV_SYN(0x00).
267.234621: lirc protocol(unknown): scancode = 0xace
267.234636: event type EV_MSC(0x04): scancode = 0xace
267.234636: event type EV_SYN(0x00).
267.298623: lirc protocol(unknown): scancode = 0xace
267.298638: event type EV_MSC(0x04): scancode = 0xace
267.298638: event type EV_SYN(0x00).
267.543345: event type EV_KEY(0x01) key_down: KEY_1(0x0002)
267.543345: event type EV_SYN(0x00).
267.570015: event type EV_KEY(0x01) key_up: KEY_1(0x0002)
267.570015: event type EV_SYN(0x00).

Add a protocol with the repeat value and set the timeout in the
driver to 10ms (to have a bit of headroom for delays) so the Xbox
DVD remote performs more responsive.

Signed-off-by: Matthias Reichl <hias@horus.com>
---
 Documentation/media/lirc.h.rst.exceptions | 1 +
 drivers/media/rc/keymaps/rc-xbox-dvd.c    | 2 +-
 drivers/media/rc/rc-main.c                | 2 ++
 drivers/media/rc/xbox_remote.c            | 4 +++-
 include/media/rc-map.h                    | 4 +++-
 include/uapi/linux/lirc.h                 | 2 ++
 6 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/Documentation/media/lirc.h.rst.exceptions b/Documentation/media/lirc.h.rst.exceptions
index e7a41d4b3d46..f8b5f1a32b7d 100644
--- a/Documentation/media/lirc.h.rst.exceptions
+++ b/Documentation/media/lirc.h.rst.exceptions
@@ -61,6 +61,7 @@ ignore symbol RC_PROTO_IMON
 ignore symbol RC_PROTO_RCMM12
 ignore symbol RC_PROTO_RCMM24
 ignore symbol RC_PROTO_RCMM32
+ignore symbol RC_PROTO_XBOX_DVD
 
 # Undocumented macros
 
diff --git a/drivers/media/rc/keymaps/rc-xbox-dvd.c b/drivers/media/rc/keymaps/rc-xbox-dvd.c
index af387244636b..42815ab57bff 100644
--- a/drivers/media/rc/keymaps/rc-xbox-dvd.c
+++ b/drivers/media/rc/keymaps/rc-xbox-dvd.c
@@ -42,7 +42,7 @@ static struct rc_map_list xbox_dvd_map = {
 	.map = {
 		.scan     = xbox_dvd,
 		.size     = ARRAY_SIZE(xbox_dvd),
-		.rc_proto = RC_PROTO_UNKNOWN,
+		.rc_proto = RC_PROTO_XBOX_DVD,
 		.name     = RC_MAP_XBOX_DVD,
 	}
 };
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index 78e79c37f208..7f1d5b226f68 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -76,6 +76,7 @@ static const struct {
 		.scancode_bits = 0x00ffffff, .repeat_period = 114 },
 	[RC_PROTO_RCMM32] = { .name = "rc-mm-32",
 		.scancode_bits = 0xffffffff, .repeat_period = 114 },
+	[RC_PROTO_XBOX_DVD] = { .name = "xbox-dvd", .repeat_period = 64 },
 };
 
 /* Used to keep track of known keymaps */
@@ -1027,6 +1028,7 @@ static const struct {
 	{ RC_PROTO_BIT_RCMM12 |
 	  RC_PROTO_BIT_RCMM24 |
 	  RC_PROTO_BIT_RCMM32,	"rc-mm",	"ir-rcmm-decoder"	},
+	{ RC_PROTO_BIT_XBOX_DVD, "xbox-dvd",	NULL			},
 };
 
 /**
diff --git a/drivers/media/rc/xbox_remote.c b/drivers/media/rc/xbox_remote.c
index f959cbb94744..79470c09989e 100644
--- a/drivers/media/rc/xbox_remote.c
+++ b/drivers/media/rc/xbox_remote.c
@@ -148,7 +148,7 @@ static void xbox_remote_rc_init(struct xbox_remote *xbox_remote)
 	struct rc_dev *rdev = xbox_remote->rdev;
 
 	rdev->priv = xbox_remote;
-	rdev->allowed_protocols = RC_PROTO_BIT_UNKNOWN;
+	rdev->allowed_protocols = RC_PROTO_BIT_XBOX_DVD;
 	rdev->driver_name = "xbox_remote";
 
 	rdev->open = xbox_remote_rc_open;
@@ -157,6 +157,8 @@ static void xbox_remote_rc_init(struct xbox_remote *xbox_remote)
 	rdev->device_name = xbox_remote->rc_name;
 	rdev->input_phys = xbox_remote->rc_phys;
 
+	rdev->timeout = MS_TO_NS(10);
+
 	usb_to_input_id(xbox_remote->udev, &rdev->input_id);
 	rdev->dev.parent = &xbox_remote->interface->dev;
 }
diff --git a/include/media/rc-map.h b/include/media/rc-map.h
index e5e86d595645..a0000f392362 100644
--- a/include/media/rc-map.h
+++ b/include/media/rc-map.h
@@ -40,6 +40,7 @@
 #define RC_PROTO_BIT_RCMM12		BIT_ULL(RC_PROTO_RCMM12)
 #define RC_PROTO_BIT_RCMM24		BIT_ULL(RC_PROTO_RCMM24)
 #define RC_PROTO_BIT_RCMM32		BIT_ULL(RC_PROTO_RCMM32)
+#define RC_PROTO_BIT_XBOX_DVD		BIT_ULL(RC_PROTO_XBOX_DVD)
 
 #define RC_PROTO_BIT_ALL \
 			(RC_PROTO_BIT_UNKNOWN | RC_PROTO_BIT_OTHER | \
@@ -55,7 +56,8 @@
 			 RC_PROTO_BIT_RC6_MCE | RC_PROTO_BIT_SHARP | \
 			 RC_PROTO_BIT_XMP | RC_PROTO_BIT_CEC | \
 			 RC_PROTO_BIT_IMON | RC_PROTO_BIT_RCMM12 | \
-			 RC_PROTO_BIT_RCMM24 | RC_PROTO_BIT_RCMM32)
+			 RC_PROTO_BIT_RCMM24 | RC_PROTO_BIT_RCMM32 | \
+			 RC_PROTO_BIT_XBOX_DVD)
 /* All rc protocols for which we have decoders */
 #define RC_PROTO_BIT_ALL_IR_DECODER \
 			(RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC5X_20 | \
diff --git a/include/uapi/linux/lirc.h b/include/uapi/linux/lirc.h
index 45fcbf99d72e..f99d9dcae667 100644
--- a/include/uapi/linux/lirc.h
+++ b/include/uapi/linux/lirc.h
@@ -195,6 +195,7 @@ struct lirc_scancode {
  * @RC_PROTO_RCMM12: RC-MM protocol 12 bits
  * @RC_PROTO_RCMM24: RC-MM protocol 24 bits
  * @RC_PROTO_RCMM32: RC-MM protocol 32 bits
+ * @RC_PROTO_XBOX_DVD: Xbox DVD Movie Playback Kit protocol
  */
 enum rc_proto {
 	RC_PROTO_UNKNOWN	= 0,
@@ -224,6 +225,7 @@ enum rc_proto {
 	RC_PROTO_RCMM12		= 24,
 	RC_PROTO_RCMM24		= 25,
 	RC_PROTO_RCMM32		= 26,
+	RC_PROTO_XBOX_DVD	= 27,
 };
 
 #endif
-- 
2.20.1