linux-kernel - Re: [V2 PATCH] ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads with Conexant codec

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Message-ID: <53AFF992.5030403@web.de>
Date:	Sun, 29 Jun 2014 13:33:38 +0200
From:	Jan Kiszka <jan.kiszka@....de>
To:	Hui Wang <jason77.wang@...il.com>, tiwai@...e.de,
	alsa-devel@...a-project.org
CC:	hui.wang@...onical.com, alex.hung@...onical.com, yk@...onical.com,
	david.henningsson@...onical.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [V2 PATCH] ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads
 with Conexant codec

On 2013-11-27 07:47, Hui Wang wrote:
> Most Thinkpad Edge series laptops use conexant codec, so far although
> the codecs have different minor Vendor Id and minor Subsystem Id,
> they all belong to the cxt5066 family, this change can make the
> mute/mic-mute LEDs support more generic among cxt_5066 family.
> 
> This design refers to the similar solution for the realtek codec
> ALC269 family in the patch_realtek.c.
> 
> Cc: Alex Hung <alex.hung@...onical.com>
> Cc: David Henningsson <david.henningsson@...onical.com>
> Signed-off-by: Hui Wang <hui.wang@...onical.com>
> ---
>  sound/pci/hda/patch_conexant.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
> index c205bb1..1f2717f 100644
> --- a/sound/pci/hda/patch_conexant.c
> +++ b/sound/pci/hda/patch_conexant.c
> @@ -3244,9 +3244,29 @@ enum {
>  #if IS_ENABLED(CONFIG_THINKPAD_ACPI)
>  
>  #include <linux/thinkpad_acpi.h>
> +#include <acpi/acpi.h>
>  
>  static int (*led_set_func)(int, bool);
>  
> +static acpi_status acpi_check_cb(acpi_handle handle, u32 lvl, void *context,
> +				 void **rv)
> +{
> +	bool *found = context;
> +	*found = true;
> +	return AE_OK;
> +}
> +
> +static bool is_thinkpad(struct hda_codec *codec)
> +{
> +	bool found = false;
> +	if (codec->subsystem_id >> 16 != 0x17aa)
> +		return false;
> +	if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, &found, NULL)) && found)
> +		return true;
> +	found = false;
> +	return ACPI_SUCCESS(acpi_get_devices("IBM0068", acpi_check_cb, &found, NULL)) && found;
> +}
> +
>  static void update_tpacpi_mute_led(void *private_data, int enabled)
>  {
>  	struct hda_codec *codec = private_data;
> @@ -3279,6 +3299,8 @@ static void cxt_fixup_thinkpad_acpi(struct hda_codec *codec,
>  	bool removefunc = false;
>  
>  	if (action == HDA_FIXUP_ACT_PROBE) {
> +		if (!is_thinkpad(codec))
> +			return;
>  		if (!led_set_func)
>  			led_set_func = symbol_request(tpacpi_led_set);
>  		if (!led_set_func) {
> @@ -3494,6 +3516,7 @@ static const struct snd_pci_quirk cxt5066_fixups[] = {
>  	SND_PCI_QUIRK(0x17aa, 0x3975, "Lenovo U300s", CXT_FIXUP_STEREO_DMIC),
>  	SND_PCI_QUIRK(0x17aa, 0x3977, "Lenovo IdeaPad U310", CXT_FIXUP_STEREO_DMIC),
>  	SND_PCI_QUIRK(0x17aa, 0x397b, "Lenovo S205", CXT_FIXUP_STEREO_DMIC),
> +	SND_PCI_QUIRK_VENDOR(0x17aa, "Thinkpad", CXT_FIXUP_THINKPAD_ACPI),
>  	SND_PCI_QUIRK(0x1c06, 0x2011, "Lemote A1004", CXT_PINCFG_LEMOTE_A1004),
>  	SND_PCI_QUIRK(0x1c06, 0x2012, "Lemote A1205", CXT_PINCFG_LEMOTE_A1205),
>  	{}
> 

Starting with this patch, my Lenovo Thinkpad X121e netbook (it's without
any mute LEDs, BTW, there is only a power LED) considers the power
button as hard reset. I have to exclude my machine from that ACPI fixup
(this is on top of current Linus master):

diff --git a/sound/pci/hda/thinkpad_helper.c b/sound/pci/hda/thinkpad_helper.c
index 6ba0b55..7e1a179 100644
--- a/sound/pci/hda/thinkpad_helper.c
+++ b/sound/pci/hda/thinkpad_helper.c
@@ -21,7 +21,8 @@ static acpi_status acpi_check_cb(acpi_handle handle, u32 lvl, void *context,
 static bool is_thinkpad(struct hda_codec *codec)
 {
 	bool found = false;
-	if (codec->subsystem_id >> 16 != 0x17aa)
+	if (codec->subsystem_id >> 16 != 0x17aa ||
+	    codec->subsystem_id == 0x17aa21ec)
 		return false;
 	if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, &found, NULL)) && found)
 		return true;


Is that the way to address it? Then I can send a proper patch. Any hints
regarding the "why" will be incorporated into its description.

Thanks,
Jan


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