[alsa-devel] [PATCH] HDA-Intel: present up to 8 HDMI/DP outputs via "hdmi" device

[Anssi Hannula]

Some new AMD cards have HDA codecs presenting 6 connected HDMI/DP pin
nodes (plus 1 unconnected pin node) according to the ALSA card database.

Example:
http://www.alsa-project.org/db/?f=de3ced7af41de0ed54d218650e5e2f16c511787b

Bump the maximum number of presented HDMI outputs per card via the
"hdmi" PCM from 4 to 8 (so that the last possible device is DEV=7).

Note that HDMI PCM devices DEV=4..7 use shared PCM device numbers, so
HDA cards that have over 4 audio PCM devices or multiple S/PDIF or modem
devices will have their remaining PCM devices misrepresented as HDMI
devices.

Signed-off-by: Anssi Hannula <anssi.hannula at iki.fi>
---

Another example:
http://www.alsa-project.org/db/?f=cd12a9d38f51c47eeedd380e4c5713f0d9a6c9de

I do not have confirmed that all of these pins are actually usable (and
therefore this patch is untested on affected hardware), but I guess that
is probable.
Maybe the large amount of them has something to do with DisplayPort
supporting multiple displays via a single connector, but that is just
a wild guess on my part...


But do we want some sort of a solution for the possible conflicts between
non-HDMI devices in the 10+ physical PCM device numbering range?


 src/conf/cards/HDA-Intel.conf | 92 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)

diff --git a/src/conf/cards/HDA-Intel.conf b/src/conf/cards/HDA-Intel.conf
index 3957c12..7976b6c 100644
--- a/src/conf/cards/HDA-Intel.conf
+++ b/src/conf/cards/HDA-Intel.conf
@@ -305,6 +305,98 @@ HDA-Intel.pcm.hdmi.3 {
 	}
 }
 
+HDA-Intel.pcm.hdmi.4 {
+	@args [ CARD AES0 AES1 AES2 AES3 ]
+	@args.CARD { type string }
+	@args.AES0 { type integer }
+	@args.AES1 { type integer }
+	@args.AES2 { type integer }
+	@args.AES3 { type integer }
+	@func refer
+	name {
+		@func concat
+		strings [
+			"cards.HDA-Intel.pcm.hdmi.common:"
+			"CARD=" $CARD ","
+			"DEVICE=10,"
+			"CTLINDEX=4,"
+			"AES0=" $AES0 ","
+			"AES1=" $AES1 ","
+			"AES2=" $AES2 ","
+			"AES3=" $AES3
+		]
+	}
+}
+
+HDA-Intel.pcm.hdmi.5 {
+	@args [ CARD AES0 AES1 AES2 AES3 ]
+	@args.CARD { type string }
+	@args.AES0 { type integer }
+	@args.AES1 { type integer }
+	@args.AES2 { type integer }
+	@args.AES3 { type integer }
+	@func refer
+	name {
+		@func concat
+		strings [
+			"cards.HDA-Intel.pcm.hdmi.common:"
+			"CARD=" $CARD ","
+			"DEVICE=11,"
+			"CTLINDEX=5,"
+			"AES0=" $AES0 ","
+			"AES1=" $AES1 ","
+			"AES2=" $AES2 ","
+			"AES3=" $AES3
+		]
+	}
+}
+
+HDA-Intel.pcm.hdmi.6 {
+	@args [ CARD AES0 AES1 AES2 AES3 ]
+	@args.CARD { type string }
+	@args.AES0 { type integer }
+	@args.AES1 { type integer }
+	@args.AES2 { type integer }
+	@args.AES3 { type integer }
+	@func refer
+	name {
+		@func concat
+		strings [
+			"cards.HDA-Intel.pcm.hdmi.common:"
+			"CARD=" $CARD ","
+			"DEVICE=12,"
+			"CTLINDEX=6,"
+			"AES0=" $AES0 ","
+			"AES1=" $AES1 ","
+			"AES2=" $AES2 ","
+			"AES3=" $AES3
+		]
+	}
+}
+
+HDA-Intel.pcm.hdmi.7 {
+	@args [ CARD AES0 AES1 AES2 AES3 ]
+	@args.CARD { type string }
+	@args.AES0 { type integer }
+	@args.AES1 { type integer }
+	@args.AES2 { type integer }
+	@args.AES3 { type integer }
+	@func refer
+	name {
+		@func concat
+		strings [
+			"cards.HDA-Intel.pcm.hdmi.common:"
+			"CARD=" $CARD ","
+			"DEVICE=13,"
+			"CTLINDEX=7,"
+			"AES0=" $AES0 ","
+			"AES1=" $AES1 ","
+			"AES2=" $AES2 ","
+			"AES3=" $AES3
+		]
+	}
+}
+
 <confdir:pcm/modem.conf>
 
 HDA-Intel.pcm.modem.0 {
-- 
1.8.1.5