I've got an HP dv6000z laptop with internal speakers, line out, line in, a built-in mic, and spdif out. The chipset is an nVidia MCP51.
--lspci--
00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
--lspci -v
00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
Subsystem: Hewlett-Packard Company Unknown device 30b7
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 50
Memory at c0000000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
Capabilities: [50] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
Capabilities: [6c] HyperTransport: MSI Mapping
--lspci -vn
00:10.1 0403: 10de:026c (rev a2)
Subsystem: 103c:30b7
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 50
Memory at c0000000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
Capabilities: [50] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
Capabilities: [6c] HyperTransport: MSI Mapping
--cat /proc/asound/card0/codec#0 (when headphone and speakers are working)
Codec: Generic 14f1 ID 5045
Address: 0
Vendor Id: 0x14f15045
Subsystem Id: 0x103c30b7
Revision Id: 0x100100
Default PCM: rates 0x140, bits 0x0e, types 0x1
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
Node 0x10 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Amp-Out caps: ofs=0x2b, nsteps=0x2b, stepsize=0x05, mute=1
Amp-Out vals: [0x21 0x21]
Pincap 0x0810014: OUT EAPD Detect
Pin Default 0x92170010: [Fixed] Speaker at Int Front
Conn = Analog, Color = Unknown
Pin-ctls: 0x40: OUT
Power: 0x0
Connection: 2
0x19* 0x17
Node 0x11 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Amp-Out caps: ofs=0x2b, nsteps=0x2b, stepsize=0x05, mute=1
Amp-Out vals: [0x1c 0x1c]
Pincap 0x08113c: IN OUT HP Detect
Pin Default 0x01214020: [Jack] HP Out at Ext Rear
Conn = 1/8, Color = Green
Pin-ctls: 0xc0: OUT HP
Power: 0x0
Connection: 2
0x19* 0x17
Node 0x12 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Amp-Out caps: ofs=0x2b, nsteps=0x2b, stepsize=0x05, mute=1
Amp-Out vals: [0x2b 0x2b]
Pincap 0x08113c: IN OUT HP Detect
Pin Default 0x01813030: [Jack] Line In at Ext Rear
Conn = 1/8, Color = Blue
Pin-ctls: 0x20: IN
Power: 0x0
Connection: 2
0x19 0x17*
Node 0x13 [Pin Complex] wcaps 0x400301: Stereo Digital
Pincap 0x0810: OUT
Pin Default 0x21447040: [Jack] SPDIF Out at Sep Rear
Conn = RCA, Color = Yellow
Pin-ctls: 0x00:
Connection: 1
0x18
Node 0x14 [Pin Complex] wcaps 0x400081: Stereo
Pincap 0x081124: IN Detect
Pin Default 0x97a70050: [Fixed] Mic at Int Riser
Conn = Analog, Color = Unknown
Pin-ctls: 0x20: IN
Node 0x15 [Pin Complex] wcaps 0x400001: Stereo
Pincap 0x0820: IN
Pin Default 0x99330060: [Fixed] CD at Int ATAPI
Conn = ATAPI, Color = Unknown
Pin-ctls: 0x00:
Node 0x16 [Beep Generator Widget] wcaps 0x70000c: Mono Amp-Out
Amp-Out caps: ofs=0x07, nsteps=0x07, stepsize=0x0b, mute=1
Amp-Out vals: [0x06]
Node 0x17 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
Amp-In caps: ofs=0x14, nsteps=0x2b, stepsize=0x05, mute=1
Amp-In vals: [0x94 0x94] [0x17 0x17] [0x94 0x94] [0x94 0x94] [0x94 0x94]
Power: 0x0
Connection: 5
0x19 0x14 0x12 0x11 0x15
Node 0x18 [Audio Output] wcaps 0x211: Stereo Digital
PCM: rates 0x040, bits 0x06, types 0x5
Node 0x19 [Audio Output] wcaps 0xc11: Stereo
PCM: rates 0x540, bits 0x0e, types 0x1
Power: 0x0
Node 0x1a [Audio Input] wcaps 0x100d0b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x17, stepsize=0x05, mute=1
Amp-In vals: [0x97 0x97] [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00 0x00]
Power: 0x0
Connection: 5
0x17 0x14 0x12 0x11 0x15*
Node 0x1b [Vendor Defined Widget] wcaps 0xf00000: Mono
I've got a hacked version of alsa 1.0.12 that only partially fixes the problem. It makes the mixers come up peroperly, but only sometimes. If they come up wrong, instead of having headphones, speaker, and PCM, I have PCM and master, and the headphone jacks (spdif and line-out) are disabled entirely. If I reboot the system, however (no full poweroff), when the computer comes back up, everything is proper.
In windows, the device comes up as a conexant chip. I've tried a fix on the alsa bugtrac, but it is for the 5047 chip, and this says that the chip ID is '5045'. So I am trying to write my own codec for the card. My questions are:
0. Is there a kernel option or an option to the alsa module to make it always come up like above?
1. Should I write a new driver or a codec and what's the difference?
2. How do I write a codec/driver for a sound card
3. How do I use the information from /proc/asound/card0/codec#0 to write the codec/driver?
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