From: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Date: Wed, 24 Apr 2024 10:34:13 +0000 (+0300)
Subject: ucm2: common: pcm: Add hdmi.conf to handle the creation
X-Git-Tag: v1.2.12~11
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=a3e1786a2025663ef9da74c9f7f2d0ecf876c0e2;p=alsa-ucm-conf.git

ucm2: common: pcm: Add hdmi.conf to handle the creation

User space expect to see hdmi: PCM devices to be able to use bytestream
passthrough.

The common/pcm/hdmi.conf provides two macros:
HdmiPCM: to generate an ALSA conf section for an hdmi: PCM device
HdmiPCMSave: to save the generated config

Example of use (sof-hda-dsp card with hardware HDMI PCMs: 3-5):
Macro.0.HdmiPCM { Device 3 Index 0 }
Macro.1.HdmiPCM { Device 4 Index 1 }
Macro.2.HdmiPCM { Device 5 Index 2 }
Macro.3.HdmiPCMSave { }

Closes: https://github.com/alsa-project/alsa-ucm-conf/pull/411
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/ucm2/common/pcm/hdmi.conf b/ucm2/common/pcm/hdmi.conf
new file mode 100644
index 0000000..0a870ed
--- /dev/null
+++ b/ucm2/common/pcm/hdmi.conf
@@ -0,0 +1,74 @@
+# Macro HdmiPCM - Generate ALSA control section for hdmi: PCM device
+#
+# Arguments:
+#   Device - hardware PCM device
+#   Index - hdmi: device index and control index
+#
+
+DefineMacro.HdmiPCM {
+	LibraryConfig.generic.Config.hdmi-pcm.pcm.hdmi."${var:__Index}" {
+		@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
+		}
+		type hooks
+		slave.pcm {
+			type hw
+			card $CARD
+			device "${evali:$__Device}"
+		}
+		hooks.0 {
+			type ctl_elems
+			hook_args [
+			{
+				name "IEC958 Playback Default"
+				index "${evali:$__Index}"
+				lock true
+				preserve true
+				value [ $AES0 $AES1 $AES2 $AES3 ]
+			}
+			{
+				name "IEC958 Playback Switch"
+				index "${evali:$__Index}"
+				value true
+			}
+			]
+		}
+		hint.device "${evali:$__Device}"
+	}
+}
+
+# Macro HdmiPCMSave - Save the generated ALSA control for hdmi: PCM device(s)
+#		      generated inside 'hdmi-pcm' section by prior calls to
+#		      HdmiPCM macro
+#
+# Arguments:
+#   [Name] - Optional name excluding the .conf extension to use for the
+#	     configuration file, defaults to "42-hdmi-pcm"
+#
+
+DefineMacro.HdmiPCMSave {
+	If.name {
+		Condition {
+			Type String
+			Empty "${var:-__Name}"
+		}
+		True.Define.__Name "42-hdmi-pcm"
+	}
+
+	FixedBootSequence [
+			cfg-save "${var:LibDir}/${var:__Name}.conf:hdmi-pcm"
+	]
+}