Re: [alsa-devel] [PATCH] ALSA: hda - Fix headset mic detection problem for two Dell laptops

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On 10/20/2016 05:50 PM, Takashi Iwai wrote:
On Thu, 20 Oct 2016 08:03:33 +0200,
Hui Wang wrote:
They uses the codec ALC255, and have the different pin cfg definition
from the ones in the existing pin quirk table. Now adding them into
the table to fix the problem.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Hui Wang <hui.wang@xxxxxxxxxxxxx>
Thanks, applied now.

But judging from the increasing number of the table entries, we may
Yes, that is really a problem.
rethink how to match the pattern in future.  The pincfg table was
introduced as a kind of fingerprint to match with the deployed
configuration.  Maybe the matching should be relaxed (e.g. doesn't
care about the assoc#), so that we can reduce the table size.
I think it is a good idea, I will do some further investigation to verify if it is safe or not.

Thanks
Hui.


Takashi

---
  sound/pci/hda/patch_realtek.c | 8 ++++++++
  1 file changed, 8 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 8483fc2..b582d57 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5857,11 +5857,19 @@ enum {
  		{0x1b, 0x02011020},
  		{0x21, 0x0221101f}),
  	SND_HDA_PIN_QUIRK(0x10ec0255, 0x1028, "Dell", ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
+		{0x14, 0x90170110},
+		{0x1b, 0x01011020},
+		{0x21, 0x0221101f}),
+	SND_HDA_PIN_QUIRK(0x10ec0255, 0x1028, "Dell", ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
  		{0x14, 0x90170130},
  		{0x1b, 0x01014020},
  		{0x21, 0x0221103f}),
  	SND_HDA_PIN_QUIRK(0x10ec0255, 0x1028, "Dell", ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
  		{0x14, 0x90170130},
+		{0x1b, 0x01011020},
+		{0x21, 0x0221103f}),
+	SND_HDA_PIN_QUIRK(0x10ec0255, 0x1028, "Dell", ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
+		{0x14, 0x90170130},
  		{0x1b, 0x02011020},
  		{0x21, 0x0221103f}),
  	SND_HDA_PIN_QUIRK(0x10ec0255, 0x1028, "Dell", ALC255_FIXUP_DELL1_MIC_NO_PRESENCE,
--
1.9.1

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