[PATCH v2] ALSA: hda/tas2781: Fix EFI name for calibration beginning with 1 instead of 0

[PATCH v2] ALSA: hda/tas2781: Fix EFI name for calibration beginning with 1 instead of 0

[Shenghao Ding]

A bug reported by one of my customers that EFI name beginning with 0
instead of 1.

Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the calibrated-data getting function for SPI and I2C into the tas2781_hda lib")
Signed-off-by: Shenghao Ding <shenghao-ding@ti.com>

---
v2:
 - remove unrelated change
v1:
 - Fix EFI name beginning with 1 instead of 0
 - Add extra comments on EFI name for calibration
 - Remove an extra space
---
 sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
index ed7771ab9475..635cbd8820ac 100644
--- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
+++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
@@ -340,7 +340,8 @@ static int tas2563_save_calibration(struct tas2781_hda *h)
 		data[offset] = i;
 		offset++;
 		for (j = 0; j < TASDEV_CALIB_N; ++j) {
-			ret = snprintf(var8, sizeof(var8), vars[j], i);
+			/* EFI name for calibration started with 1, not 0 */
+			ret = snprintf(var8, sizeof(var8), vars[j], i + 1);
 
 			if (ret < 0 || ret >= sizeof(var8) - 1) {
 				dev_err(p->dev, "%s: Read %s failed\n",
@@ -349,7 +350,7 @@ static int tas2563_save_calibration(struct tas2781_hda *h)
 			}
 			/*
 			 * Our variable names are ASCII by construction, but
-			 * EFI names are wide chars.  Convert and zero-pad.
+			 * EFI names are wide chars. Convert and zero-pad.
 			 */
 			memset(efi_name, 0, sizeof(efi_name));
 			for (k = 0; k < sizeof(var8) && var8[k]; k++)
-- 
2.43.0

Re: [PATCH v2] ALSA: hda/tas2781: Fix EFI name for calibration beginning with 1 instead of 0

[Takashi Iwai]

On Tue, 26 Aug 2025 11:41:05 +0200,
Shenghao Ding wrote:
> 
> A bug reported by one of my customers that EFI name beginning with 0
> instead of 1.
> 
> Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the calibrated-data getting function for SPI and I2C into the tas2781_hda lib")
> Signed-off-by: Shenghao Ding <shenghao-ding@ti.com>
> 
> ---
> v2:
>  - remove unrelated change
> v1:
>  - Fix EFI name beginning with 1 instead of 0
>  - Add extra comments on EFI name for calibration
>  - Remove an extra space
> ---
>  sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> index ed7771ab9475..635cbd8820ac 100644
> --- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> +++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> @@ -340,7 +340,8 @@ static int tas2563_save_calibration(struct tas2781_hda *h)
>  		data[offset] = i;
>  		offset++;
>  		for (j = 0; j < TASDEV_CALIB_N; ++j) {
> -			ret = snprintf(var8, sizeof(var8), vars[j], i);
> +			/* EFI name for calibration started with 1, not 0 */
> +			ret = snprintf(var8, sizeof(var8), vars[j], i + 1);
>  
>  			if (ret < 0 || ret >= sizeof(var8) - 1) {
>  				dev_err(p->dev, "%s: Read %s failed\n",
> @@ -349,7 +350,7 @@ static int tas2563_save_calibration(struct tas2781_hda *h)
>  			}
>  			/*
>  			 * Our variable names are ASCII by construction, but
> -			 * EFI names are wide chars.  Convert and zero-pad.
> +			 * EFI names are wide chars. Convert and zero-pad.
>  			 */
>  			memset(efi_name, 0, sizeof(efi_name));
>  			for (k = 0; k < sizeof(var8) && var8[k]; k++)

Please drop unrelated change and concentrate on the real issue.


thanks,

Takashi

Re: [PATCH v2] ALSA: hda/tas2781: Fix EFI name for calibration beginning with 1 instead of 0

[Gergo Koteles]

Hi Shenghao,

On Tue, 2025-08-26 at 17:41 +0800, Shenghao Ding wrote:
> A bug reported by one of my customers that EFI name beginning with 0
> instead of 1.
> 
> Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the calibrated-data getting function for SPI and I2C into the tas2781_hda lib")
> Signed-off-by: Shenghao Ding <shenghao-ding@ti.com>
> 
> ---
> v2:
>  - remove unrelated change
> v1:
>  - Fix EFI name beginning with 1 instead of 0
>  - Add extra comments on EFI name for calibration
>  - Remove an extra space
> ---
>  sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> index ed7771ab9475..635cbd8820ac 100644
> --- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> +++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> @@ -340,7 +340,8 @@ static int tas2563_save_calibration(struct tas2781_hda *h)
>  		data[offset] = i;
>  		offset++;
>  		for (j = 0; j < TASDEV_CALIB_N; ++j) {
> -			ret = snprintf(var8, sizeof(var8), vars[j], i);
> +			/* EFI name for calibration started with 1, not 0 */
> +			ret = snprintf(var8, sizeof(var8), vars[j], i + 1);
>  
>  			if (ret < 0 || ret >= sizeof(var8) - 1) {
>  				dev_err(p->dev, "%s: Read %s failed\n",
> @@ -349,7 +350,7 @@ static int tas2563_save_calibration(struct tas2781_hda *h)
>  			}
>  			/*
>  			 * Our variable names are ASCII by construction, but
> -			 * EFI names are wide chars.  Convert and zero-pad.
> +			 * EFI names are wide chars. Convert and zero-pad.
>  			 */
>  			memset(efi_name, 0, sizeof(efi_name));
>  			for (k = 0; k < sizeof(var8) && var8[k]; k++)

The previous tas2781_apply_calib() and tas2563_apply_calib() functions
performed a big endian conversion on the data readed from the EFI
variables.

I couldn't find this in either fmwlib or this file.
Could you please recheck if this happens somewhere?

Thanks,
Gergo

Re: [PATCH v2] ALSA: hda/tas2781: Fix EFI name for calibration beginning with 1 instead of 0

[Gergo Koteles]

Hi Shenghao,

On Tue, 2025-08-26 at 17:41 +0800, Shenghao Ding wrote:
> A bug reported by one of my customers that EFI name beginning with 0
> instead of 1.
> 
> Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the calibrated-data getting function for SPI and I2C into the tas2781_hda lib")
> Signed-off-by: Shenghao Ding <shenghao-ding@ti.com>
> 
> ---
> v2:
>  - remove unrelated change
> v1:
>  - Fix EFI name beginning with 1 instead of 0
>  - Add extra comments on EFI name for calibration
>  - Remove an extra space
> ---
>  sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> index ed7771ab9475..635cbd8820ac 100644
> --- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> +++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> @@ -340,7 +340,8 @@ static int tas2563_save_calibration(struct tas2781_hda *h)
>  		data[offset] = i;
>  		offset++;
>  		for (j = 0; j < TASDEV_CALIB_N; ++j) {
> -			ret = snprintf(var8, sizeof(var8), vars[j], i);
> +			/* EFI name for calibration started with 1, not 0 */
> +			ret = snprintf(var8, sizeof(var8), vars[j], i + 1);
>  
>  			if (ret < 0 || ret >= sizeof(var8) - 1) {
>  				dev_err(p->dev, "%s: Read %s failed\n",
> @@ -349,7 +350,7 @@ static int tas2563_save_calibration(struct tas2781_hda *h)
>  			}
>  			/*
>  			 * Our variable names are ASCII by construction, but
> -			 * EFI names are wide chars.  Convert and zero-pad.
> +			 * EFI names are wide chars. Convert and zero-pad.
>  			 */
>  			memset(efi_name, 0, sizeof(efi_name));
>  			for (k = 0; k < sizeof(var8) && var8[k]; k++)

In the tas2563_save_calibration() function the variables are read in
the following order: R0, InvR0, R0_Low, Power, TLim.
They are also included in cali_data in this order.

But the tasdev_load_calibrated_data() function reads them from
cali_data as R0, R0_Low, InvR0, Power, TLim.

And this may be true for tas2781 as well.

Could you check this also?

Thanks,
Gergo

RE: [EXTERNAL] Re: [PATCH v2] ALSA: hda/tas2781: Fix EFI name for calibration beginning with 1 instead of 0

[Ding, Shenghao]

Hi GK
Long time no see. Thanks for pointing that out.
I'm preparing a new patch to correct it.

> -----Original Message-----
> From: Gergo Koteles <soyer@irl.hu>
> Sent: Wednesday, August 27, 2025 9:34 AM
> To: Ding, Shenghao <shenghao-ding@ti.com>; tiwai@suse.de
> Cc: broonie@kernel.org; andriy.shevchenko@linux.intel.com;
> 13564923607@139.com; 13916275206@139.com; alsa-devel@alsa-
> project.org; linux-kernel@vger.kernel.org; Xu, Baojun <baojun.xu@ti.com>;
> Baojun.Xu@fpt.com; Ji, Jesse <jesse-ji@ti.com>
> Subject: [EXTERNAL] Re: [PATCH v2] ALSA: hda/tas2781: Fix EFI name for
> calibration beginning with 1 instead of 0
> 
> Hi Shenghao, On Tue, 2025-08-26 at 17: 41 +0800, Shenghao Ding wrote: > A
> bug reported by one of my customers that EFI name beginning with 0 > instead
> of 1. > > Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the
> calibrated-data ZjQcmQRYFpfptBannerStart This message was sent from
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> ZjQcmQRYFpfptBannerEnd
> Hi Shenghao,
> 
> On Tue, 2025-08-26 at 17:41 +0800, Shenghao Ding wrote:
> > A bug reported by one of my customers that EFI name beginning with 0
> > instead of 1.
> >
> > Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the
> > calibrated-data getting function for SPI and I2C into the tas2781_hda
> > lib")
> > Signed-off-by: Shenghao Ding <shenghao-ding@ti.com>
> >
> > ---
> > v2:
> >  - remove unrelated change
> > v1:
> >  - Fix EFI name beginning with 1 instead of 0
> >  - Add extra comments on EFI name for calibration
> >  - Remove an extra space
> > ---
> >  sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> > b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> > index ed7771ab9475..635cbd8820ac 100644
> > --- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> > +++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> > @@ -340,7 +340,8 @@ static int tas2563_save_calibration(struct
> tas2781_hda *h)
> >  		data[offset] = i;
> >  		offset++;
> >  		for (j = 0; j < TASDEV_CALIB_N; ++j) {
> > -			ret = snprintf(var8, sizeof(var8), vars[j], i);
> > +			/* EFI name for calibration started with 1, not 0 */
> > +			ret = snprintf(var8, sizeof(var8), vars[j], i + 1);
> >
> >  			if (ret < 0 || ret >= sizeof(var8) - 1) {
> >  				dev_err(p->dev, "%s: Read %s failed\n", @@ -
> 349,7 +350,7 @@
> > static int tas2563_save_calibration(struct tas2781_hda *h)
> >  			}
> >  			/*
> >  			 * Our variable names are ASCII by construction, but
> > -			 * EFI names are wide chars.  Convert and zero-pad.
> > +			 * EFI names are wide chars. Convert and zero-pad.
> >  			 */
> >  			memset(efi_name, 0, sizeof(efi_name));
> >  			for (k = 0; k < sizeof(var8) && var8[k]; k++)
> 
> In the tas2563_save_calibration() function the variables are read in the
> following order: R0, InvR0, R0_Low, Power, TLim.
> They are also included in cali_data in this order.
> 
> But the tasdev_load_calibrated_data() function reads them from cali_data as
> R0, R0_Low, InvR0, Power, TLim.
> 
> And this may be true for tas2781 as well.


> 
> Could you check this also?
> 
> Thanks,
> Gergo

Re: [EXTERNAL] Re: [PATCH v2] ALSA: hda/tas2781: Fix EFI name for calibration beginning with 1 instead of 0

[Gergo Koteles]

Hi Shenghao,

On Wed, 2025-08-27 at 14:15 +0000, Ding, Shenghao wrote:
> Long time no see. Thanks for pointing that out.
> I'm preparing a new patch to correct it.
> 
> 

Yeah, the amps worked well, so no need to write :)

Rolling distros are moving to kernel 6.16 soon, so I'm worried about
the speakers.

Can the amplifier protect the speaker even with completely wrong
calibration values?

Thanks,
Gergo