ALSA: hda/hdmi: Restrict prompt only for CONFIG_EXPERT

The split of HDMI codec driver may confuse users when migrating from
the previous kernel configs and leave some drivers disabled
unexpectedly.  Although we've already set y to all HDMI codec drivers
as default, it's still safer to paper over the wrong choices.

This patch marks the prompt of each HDMI codec driver with
CONFIG_EXPERT, so that they are all enabled when the top-level
CONFIG_SND_HDA_CODEC_HDMI is set.

For users who really care about the minimalistic configuration, they
can turn each driver on/off individually after setting
CONFIG_EXPERT=y.

The patch also adds the missing help text to the top-level
CONFIG_SND_HDA_CODEC_HDMI together with the explanation of individual
choices, too.

Fixes: 73cd049 ("ALSA: hda/hdmi: Split vendor codec drivers")
Link: https://lore.kernel.org/10172c80-daec-4e20-ab57-a483cf1afc02@molgen.mpg.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250806192541.21949-3-tiwai@suse.de

Author: tiwai

sound/hda/codecs/hdmi/Kconfig

@@ -2,11 +2,17 @@
 
 menuconfig SND_HDA_CODEC_HDMI
 	tristate "HD-audio HDMI codec support"
+	help
+	  Say Y or M here to include HD-audio HDMI/DislayPort codec support.
+
+	  This will enable all HDMI/DP codec drivers as default, but you can
+	  enable/disable each codec driver individually, too (only when
+	  CONFIG_EXPERT is set).
 
 if SND_HDA_CODEC_HDMI
 
 config SND_HDA_CODEC_HDMI_GENERIC
-	tristate "Generic HDMI/DisplayPort HD-audio codec support"
+	tristate "Generic HDMI/DisplayPort HD-audio codec support" if EXPERT
 	select SND_DYNAMIC_MINORS
 	select SND_PCM_ELD
 	default y
@@ -18,14 +24,14 @@ config SND_HDA_CODEC_HDMI_GENERIC
 	  to assure the multiple streams for DP-MST support.
 
 config SND_HDA_CODEC_HDMI_SIMPLE
-	tristate "Simple HDMI/DisplayPort HD-audio codec support"
+	tristate "Simple HDMI/DisplayPort HD-audio codec support" if EXPERT
 	default y
 	help
 	  Say Y or M here to include Simple HDMI and DisplayPort HD-audio
 	  codec support for VIA and other codecs.
 
 config SND_HDA_CODEC_HDMI_INTEL
-	tristate "Intel HDMI/DisplayPort HD-audio codec support"
+	tristate "Intel HDMI/DisplayPort HD-audio codec support" if EXPERT
 	select SND_HDA_CODEC_HDMI_GENERIC
 	default y
 	help
@@ -48,31 +54,31 @@ config SND_HDA_INTEL_HDMI_SILENT_STREAM
 	  are kept reserved both at transmitter and receiver.
 
 config SND_HDA_CODEC_HDMI_ATI
-	tristate "AMD/ATI HDMI/DisplayPort HD-audio codec support"
+	tristate "AMD/ATI HDMI/DisplayPort HD-audio codec support" if EXPERT
 	select SND_HDA_CODEC_HDMI_GENERIC
 	default y
 	help
 	  Say Y or M here to include AMD/ATI graphics HDMI and DisplayPort
 	  HD-audio codec support.
 
 config SND_HDA_CODEC_HDMI_NVIDIA
-	tristate "Nvidia HDMI/DisplayPort HD-audio codec support"
+	tristate "Nvidia HDMI/DisplayPort HD-audio codec support" if EXPERT
 	select SND_HDA_CODEC_HDMI_GENERIC
 	default y
 	help
 	  Say Y or M here to include HDMI and DisplayPort HD-audio codec
 	  support for the recent Nvidia graphics cards.
 
 config SND_HDA_CODEC_HDMI_NVIDIA_MCP
-	tristate "Legacy Nvidia HDMI/DisplayPort HD-audio codec support"
+	tristate "Legacy Nvidia HDMI/DisplayPort HD-audio codec support" if EXPERT
 	select SND_HDA_CODEC_HDMI_SIMPLE
 	default y
 	help
 	  Say Y or M here to include HDMI and DisplayPort HD-audio codec
 	  support for the legacy Nvidia graphics like MCP73, MCP67, MCP77/78.
 
 config SND_HDA_CODEC_HDMI_TEGRA
-	tristate "Nvidia Tegra HDMI/DisplayPort HD-audio codec support"
+	tristate "Nvidia Tegra HDMI/DisplayPort HD-audio codec support" if EXPERT
 	select SND_HDA_CODEC_HDMI_GENERIC
 	default y
 	help