V4L/DVB: ir-core: Add support for badly-implemented hardware decoders

A few hardware Remote Controller decoders, even using a standard protocol,
aren't able to provide the entire scancode. Due to that, the capability
of using other IR's are limited on those hardware.

Adds a way to indicate to ir-core what are the bits that the hardware
provides, from a scancode, allowing the addition of a complete IR table
to the kernel and allowing a limited support for changing the Remote
Controller on those devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 20 insertions, 4 deletions

diff --git a/include/media/ir-core.h b/include/media/ir-core.h
index 0f64b48ecd90..4397ea3d9754 100644
--- a/include/media/ir-core.h
+++ b/include/media/ir-core.h
@@ -33,12 +33,28 @@ enum raw_event_type {
         IR_STOP_EVENT   = (1 << 3),
 };
 
+/**
+ * struct ir_dev_props - Allow caller drivers to set special properties
+ * @allowed_protos: bitmask with the supported IR_TYPE_* protocols
+ * @scanmask: some hardware decoders are not capable of providing the full
+ *      scancode to the application. As this is a hardware limit, we can't do
+ *      anything with it. Yet, as the same keycode table can be used with other
+ *      devices, a mask is provided to allow its usage. Drivers should generally
+ *      leave this field in blank
+ * @priv: driver-specific data, to be used on the callbacks
+ * @change_protocol: allow changing the protocol used on hardware decoders
+ * @open: callback to allow drivers to enable polling/irq when IR input device
+ *      is opened.
+ * @close: callback to allow drivers to disable polling/irq when IR input device
+ *      is opened.
+ */
 struct ir_dev_props {
-        unsigned long allowed_protos;
+        unsigned long   allowed_protos;
+        u32             scanmask;
         void            *priv;
-        int (*change_protocol)(void *priv, u64 ir_type);
-        int (*open)(void *priv);
-        void (*close)(void *priv);
+        int             (*change_protocol)(void *priv, u64 ir_type);
+        int             (*open)(void *priv);
+        void            (*close)(void *priv);
 };
 
 struct ir_raw_event {