linux: add patch to fix channel mappings

Signed-off-by: Stephan Raue <stephan@openelec.tv>

packages/linux/patches/3.7.5/linux-990.02-hda-Fix-default-multichannel-HDMI-mapping-regre.patch

@@ -0,0 +1,66 @@
+From b3ed803a1f4012a5067087674b8b1efad22d2bb0 Mon Sep 17 00:00:00 2001
+From: Anssi Hannula <anssi.hannula@iki.fi>
+Date: Sun, 3 Feb 2013 17:28:34 +0200
+Subject: [PATCH] ALSA: hda - Fix default multichannel HDMI mapping regression
+
+Commit d45e6889ee69456a4d5b1bbb32252f460cd48fa9 ("ALSA: hda - Provide
+the proper channel mapping for generic HDMI driver") added support for
+custom channel maps in the HDA HDMI driver. Due to a mistake in an
+'if' condition the custom map is always used even when no such map has
+been set. This causes incorrect channel mapping for multichannel audio
+by default.
+
+Pass per_pin->chmap_set to hdmi_setup_channel_mapping() as a parameter
+so that it can use it for detecting if a custom map has been set instead
+of checking if map is NULL (which is never the case).
+
+Reported-by: Staffan Lindberg <pike@xbmc.org>
+Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
+Cc: stable@vger.kernel.org
+---
+
+This also affects stable 3.7, but not earlier versions.
+
+ sound/pci/hda/patch_hdmi.c |   11 +++++++----
+ 1 file changed, 7 insertions(+), 4 deletions(-)
+
+diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
+index 807a2aa..e85959f 100644
+--- a/sound/pci/hda/patch_hdmi.c
++++ b/sound/pci/hda/patch_hdmi.c
+@@ -714,9 +714,10 @@ static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
+ 
+ static void hdmi_setup_channel_mapping(struct hda_codec *codec,
+ 				       hda_nid_t pin_nid, bool non_pcm, int ca,
+-				       int channels, unsigned char *map)
++				       int channels, unsigned char *map,
++				       bool chmap_set)
+ {
+-	if (!non_pcm && map) {
++	if (!non_pcm && chmap_set) {
+ 		hdmi_manual_setup_channel_mapping(codec, pin_nid,
+ 						  channels, map);
+ 	} else {
+@@ -905,7 +906,8 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
+ 			    pin_nid,
+ 			    channels);
+ 		hdmi_setup_channel_mapping(codec, pin_nid, non_pcm, ca,
+-					   channels, per_pin->chmap);
++					   channels, per_pin->chmap,
++					   per_pin->chmap_set);
+ 		hdmi_stop_infoframe_trans(codec, pin_nid);
+ 		hdmi_fill_audio_infoframe(codec, pin_nid,
+ 					    ai.bytes, sizeof(ai));
+@@ -915,7 +917,8 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
+ 		 * accordingly */
+ 		if (per_pin->non_pcm != non_pcm)
+ 			hdmi_setup_channel_mapping(codec, pin_nid, non_pcm, ca,
+-						   channels, per_pin->chmap);
++						   channels, per_pin->chmap,
++						   per_pin->chmap_set);
+ 	}
+ 
+ 	per_pin->non_pcm = non_pcm;
+-- 
+1.7.10
+