From: David Härdeman <david@hardeman.nu>
Date: Thu, 3 Apr 2014 23:31:51 +0000 (-0300)
Subject: [media] dib0700: NEC scancode cleanup
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~155^2~123
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af3a4a9bbeb00df3e42e77240b4cdac5479812f9;p=pandora-kernel.git

[media] dib0700: NEC scancode cleanup

the RC RX packet is defined as:

        struct dib0700_rc_response {
		...
                                u8 not_system;
                                u8 system;
		...
                u8 data;
                u8 not_data;

The NEC protocol transmits in the order:
        system
        not_system
        data
        not_data

Note that the code defines the NEC extended scancode as:

        scancode = be16_to_cpu(poll_reply->system16) << 8 | poll_reply->data;

i.e.

        scancode = poll_reply->not_system << 16 |
                   poll_reply->system     << 8  |
                   poll_reply->data;

Which, if the order *is* reversed, would mean that the scancode that
gets defined is in reality:

        scancode = poll_reply->system     << 16 |
                   poll_reply->not_system << 8  |
                   poll_reply->data;

Which is the same as the order used in drivers/media/rc/ir-nec-decoder.c.

This patch changes the code to match my assumption (the generated scancode
should, however, not change).

[m.chehab@samsung.com: rebased and fixed the decoding error message]
Signed-off-by: David Härdeman <david@hardeman.nu>
CC: Patrick Boettcher <pboettcher@kernellabs.com>
Tested-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
---

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