Re: [External] Re: [PATCH v2] ALSA: hda: Support for Ideapad hotkey mute LEDs

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On 2025/1/3 23:17, Takashi Iwai wrote:
On Mon, 30 Dec 2024 01:33:01 +0100,
Jackie EG1 Dong wrote:

On Tue, 24 Dec 2024 09:33:16 +0100,
  > Jackie Dong wrote:
  >>
  >> --- a/sound/pci/hda/patch_realtek.c
  >> +++ b/sound/pci/hda/patch_realtek.c
  >> @@ -6934,6 +6934,16 @@ static void alc_fixup_thinkpad_acpi(struct hda_codec *codec,
  >>   	hda_fixup_thinkpad_acpi(codec, fix, action);
  >>   }
  >>
  >> +/* for hda_fixup_ideapad_acpi() */
  >> +#include "ideapad_hotkey_led_helper.c"
  >> +
  >> +static void alc_fixup_ideapad_acpi(struct hda_codec *codec,
  >> +				   const struct hda_fixup *fix, int action)
  >> +{
  >> +	alc_fixup_no_shutup(codec, fix, action); /* reduce click noise */
  >> +	hda_fixup_ideapad_acpi(codec, fix, action);
  >> +}
  >
  > So this unconditionally call alc_fixup_no_shutup(), and this  > introduces another behavior to the existing entry -- i.e. there is a  > chance of breakage.
  >
  > If we want to be very conservative, this call should be limited to  > Ideapad.
  > For alc_fixup_no_shutup(codec, fix, action),
  I want to keep same behavior with alc_fixup_thinkpad_apci() and alc_fixup_idea_acpi() for one sound card. So, I add alc_fixup_no_shutup() in alc_fixup_ideapad_acpi().
----------Related source code of patch_reatek.c are FYR as below.
static void alc_fixup_thinkpad_acpi(struct hda_codec *codec,
                                      const struct hda_fixup *fix, int
action)
{
          alc_fixup_no_shutup(codec, fix, action); /* reduce click noise */
          hda_fixup_thinkpad_acpi(codec, fix, action); }

/* for hda_fixup_ideapad_acpi() */
#include "ideapad_hotkey_led_helper.c"

static void alc_fixup_ideapad_acpi(struct hda_codec *codec,
                                     const struct hda_fixup *fix, int action) {
          alc_fixup_no_shutup(codec, fix, action); /* reduce click noise */
          hda_fixup_ideapad_acpi(codec, fix, action);
}

Oh yeah, but then it can be bad in other way round; the chain call of
alc_fixup_thinkpad_acpi() contains alc_fixup_no_shutup() and the
alc_fixup_ideadpad_acpi() also contains alc_fixup_no_shutup().
That is, alc_fixup_no_shutup() will be called twice for Thinkpad.

Many thanks to Takashi for your detail comments and sample code, I understand it now.

I'll check the logic of the code and update the patch later.

Best Regards,

Jackie Dong
Instead, you can change like:

--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6925,11 +6925,16 @@ static void alc285_fixup_hp_envy_x360(struct hda_codec *codec,
  /* for hda_fixup_thinkpad_acpi() */
  #include "thinkpad_helper.c"
-static void alc_fixup_thinkpad_acpi(struct hda_codec *codec,
-				    const struct hda_fixup *fix, int action)
+/* for hda_fixup_ideapad_acpi() */
+#include "ideapad_hotkey_led_helper.c"
+
+/* generic fixup for both Lenovo Thinkpad and Ideapad */
+static void alc_fixup_xpad_acpi(struct hda_codec *codec,
+				const struct hda_fixup *fix, int action)
  {
  	alc_fixup_no_shutup(codec, fix, action); /* reduce click noise */
  	hda_fixup_thinkpad_acpi(codec, fix, action);
+	hda_fixup_ideapad_acpi(codec, fix, action);
  }
/* Fixup for Lenovo Legion 15IMHg05 speaker output on headset removal. */
@@ -8321,7 +8326,7 @@ static const struct hda_fixup alc269_fixups[] = {
  	},
  	[ALC269_FIXUP_THINKPAD_ACPI] = {
  		.type = HDA_FIXUP_FUNC,
-		.v.func = alc_fixup_thinkpad_acpi,
+		.v.func = alc_fixup_xpad_acpi,
  		.chained = true,
  		.chain_id = ALC269_FIXUP_SKU_IGNORE,
  	},

Since hda_fixup_ideapad_acpi() is NOP except for Ideapad, this
shouldn't break other models, while it covers the Ideadpad now.


thanks,

Takashi






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