[PATCH 0/4] SDCA Improvements

[PATCH 0/4] SDCA Improvements

[Charles Keepax]

Another fairly mixed bag of small SDCA fixes/improvements. Fix one DisCo
property that was treated as mandatory but is actually not present in
the first version of the specification. Fix the counting of routes for
SU/GE DAPM widgets, this currently makes assumptions that are not
guaranteed to be true which can result in too many/few DAPM routes.

Then finally a couple improvements to the volume controls, simplify the
mapping between ALSA and SDCA volumes and pull the volume stuff back
into the SDCA code. It just wasn't sitting right with me that it was
being handled in the ASoC core given it is unlikely to ever see any
reuse outside of SDCA.

Thanks,
Charles

Charles Keepax (4):
  ASoC: SDCA: Add default value for mipi-sdca-function-reset-max-delay
  ASoC: SDCA: Update counting of SU/GE DAPM routes
  ASoC: SDCA: Improve mapping of Q7.8 SDCA volumes
  ASoC: SDCA: Pull the Q7.8 volume helpers out of soc-ops

 include/sound/soc.h             |   1 -
 sound/soc/sdca/sdca_asoc.c      | 114 ++++++++++++++++++++++++++++----
 sound/soc/sdca/sdca_fdl.c       |   5 --
 sound/soc/sdca/sdca_functions.c |   6 +-
 sound/soc/soc-ops.c             |  63 +++---------------
 5 files changed, 117 insertions(+), 72 deletions(-)

-- 
2.47.3

[PATCH 1/4] ASoC: SDCA: Add default value for mipi-sdca-function-reset-max-delay

[Charles Keepax]

Add a default value for the function reset timeout since version 1.0
of the SDCA specification doesn't actually include this property, it
was added later.

Fixes: 7b6be935e7ef ("ASoC: SDCA: Parse Function Reset max delay")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 sound/soc/sdca/sdca_fdl.c       | 5 -----
 sound/soc/sdca/sdca_functions.c | 6 +++++-
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/sound/soc/sdca/sdca_fdl.c b/sound/soc/sdca/sdca_fdl.c
index 07892bc3a44e6..994821a6df617 100644
--- a/sound/soc/sdca/sdca_fdl.c
+++ b/sound/soc/sdca/sdca_fdl.c
@@ -46,11 +46,6 @@ int sdca_reset_function(struct device *dev, struct sdca_function_data *function,
 	if (ret) // Allowed for function reset to not be implemented
 		return 0;
 
-	if (!function->reset_max_delay) {
-		dev_err(dev, "No reset delay specified in DisCo\n");
-		return -EINVAL;
-	}
-
 	/*
 	 * Poll up to 16 times but no more than once per ms, these are just
 	 * arbitrarily selected values, so may be fine tuned in future.
diff --git a/sound/soc/sdca/sdca_functions.c b/sound/soc/sdca/sdca_functions.c
index 95b67bb904c31..a0aed95c76345 100644
--- a/sound/soc/sdca/sdca_functions.c
+++ b/sound/soc/sdca/sdca_functions.c
@@ -2167,8 +2167,12 @@ int sdca_parse_function(struct device *dev, struct sdw_slave *sdw,
 
 	ret = fwnode_property_read_u32(function_desc->node,
 				       "mipi-sdca-function-reset-max-delay", &tmp);
-	if (!ret)
+	if (ret || tmp == 0) {
+		dev_dbg(dev, "reset delay missing, defaulting to 100mS\n");
+		function->reset_max_delay = 100000;
+	} else {
 		function->reset_max_delay = tmp;
+	}
 
 	dev_dbg(dev, "%pfwP: name %s busy delay %dus reset delay %dus\n",
 		function->desc->node, function->desc->name,
-- 
2.47.3

[PATCH 2/4] ASoC: SDCA: Update counting of SU/GE DAPM routes

[Charles Keepax]

Device Layer Selector Unit's are controlled by a Group Entity control
rather than by the host directly. For the purposes of the ASoC class
driver the number of input routes to the SU is controlled by the number
of options within the Group Entity Selected Mode Control. ie. One valid
DAPM route for each valid route defined in the Group Entity.

Currently the code assumes that a Device Layer SU will have a number of
routes equal to the number of potential sources for the SU. ie. it
counts the routes using the SU, but then creates the routes using the
GE. However, this isn't actually true, it is perfectly allowed for the
GE to only define options for some of the potential sources of the SU.o
In such a case the number of routes return will not match those created,
leading to either an overflow of the routes array or undefined routes to
be past to the ASoC core, both of which generally lead to the sound card
failing to probe.

Update the handling for the counting of routes to count the connected
routes on the GE itself and then ignore the source routes on the SU.
This makes it match the logic generating the routes and ensuring that
both remain in sync.

Fixes: 2c8b3a8e6aa8 ("ASoC: SDCA: Create DAPM widgets and routes from DisCo")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 sound/soc/sdca/sdca_asoc.c | 41 +++++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 7 deletions(-)

diff --git a/sound/soc/sdca/sdca_asoc.c b/sound/soc/sdca/sdca_asoc.c
index a0191e5a5a7dd..b6536eeecf58f 100644
--- a/sound/soc/sdca/sdca_asoc.c
+++ b/sound/soc/sdca/sdca_asoc.c
@@ -51,6 +51,25 @@ static bool readonly_control(struct sdca_control *control)
 	return control->has_fixed || control->mode == SDCA_ACCESS_MODE_RO;
 }
 
+static int ge_count_routes(struct sdca_entity *entity)
+{
+	int count = 0;
+	int i, j;
+
+	for (i = 0; i < entity->ge.num_modes; i++) {
+		struct sdca_ge_mode *mode = &entity->ge.modes[i];
+
+		for (j = 0; j < mode->num_controls; j++) {
+			struct sdca_ge_control *affected = &mode->controls[j];
+
+			if (affected->sel != SDCA_CTL_SU_SELECTOR || affected->val)
+				count++;
+		}
+	}
+
+	return count;
+}
+
 /**
  * sdca_asoc_count_component - count the various component parts
  * @dev: Pointer to the device against which allocations will be done.
@@ -74,6 +93,7 @@ int sdca_asoc_count_component(struct device *dev, struct sdca_function_data *fun
 			      int *num_widgets, int *num_routes, int *num_controls,
 			      int *num_dais)
 {
+	struct sdca_control *control;
 	int i, j;
 
 	*num_widgets = function->num_entities - 1;
@@ -83,6 +103,7 @@ int sdca_asoc_count_component(struct device *dev, struct sdca_function_data *fun
 
 	for (i = 0; i < function->num_entities - 1; i++) {
 		struct sdca_entity *entity = &function->entities[i];
+		bool skip_primary_routes = false;
 
 		/* Add supply/DAI widget connections */
 		switch (entity->type) {
@@ -96,6 +117,17 @@ int sdca_asoc_count_component(struct device *dev, struct sdca_function_data *fun
 		case SDCA_ENTITY_TYPE_PDE:
 			*num_routes += entity->pde.num_managed;
 			break;
+		case SDCA_ENTITY_TYPE_GE:
+			*num_routes += ge_count_routes(entity);
+			skip_primary_routes = true;
+			break;
+		case SDCA_ENTITY_TYPE_SU:
+			control = sdca_selector_find_control(dev, entity, SDCA_CTL_SU_SELECTOR);
+			if (!control)
+				return -EINVAL;
+
+			skip_primary_routes = (control->layers == SDCA_ACCESS_LAYER_DEVICE);
+			break;
 		default:
 			break;
 		}
@@ -104,7 +136,8 @@ int sdca_asoc_count_component(struct device *dev, struct sdca_function_data *fun
 			(*num_routes)++;
 
 		/* Add primary entity connections from DisCo */
-		*num_routes += entity->num_sources;
+		if (!skip_primary_routes)
+			*num_routes += entity->num_sources;
 
 		for (j = 0; j < entity->num_controls; j++) {
 			if (exported_control(entity, &entity->controls[j]))
@@ -442,7 +475,6 @@ static int entity_parse_su_device(struct device *dev,
 				  struct snd_soc_dapm_route **route)
 {
 	struct sdca_control_range *range;
-	int num_routes = 0;
 	int i, j;
 
 	if (!entity->group) {
@@ -478,11 +510,6 @@ static int entity_parse_su_device(struct device *dev,
 				return -EINVAL;
 			}
 
-			if (++num_routes > entity->num_sources) {
-				dev_err(dev, "%s: too many input routes\n", entity->label);
-				return -EINVAL;
-			}
-
 			term = sdca_range_search(range, SDCA_SELECTED_MODE_INDEX,
 						 mode->val, SDCA_SELECTED_MODE_TERM_TYPE);
 			if (!term) {
-- 
2.47.3

[PATCH 3/4] ASoC: SDCA: Improve mapping of Q7.8 SDCA volumes

[Charles Keepax]

SDCA measures volumes in 256ths of a dB, whereas ALSA measures
volumes in 100ths of a dB. Currently the SDCA volume controls are
mapped to ALSA controls by mapping the step size and working out
the number of steps for this mapped step size. Due to quantization
of the step size this means the number of steps in the ALSA
control will rarely match the number of steps in the SDCA control,
leading to skipped values and multiple values that map to the
same volume. This is not a huge problem, the volume is still
increasing and the differences will be small but it is not really
desirable.

It is simpler and more accurate to count the number of steps based on
the SDCA volume levels. This gives a 1-to-1 mapping between control
values and register volumes. The TLV is based on a minimum and maximum
volume so still accurately specifies the volume range.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 sound/soc/sdca/sdca_asoc.c |  6 ++----
 sound/soc/soc-ops.c        | 12 ++----------
 2 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/sound/soc/sdca/sdca_asoc.c b/sound/soc/sdca/sdca_asoc.c
index b6536eeecf58f..e6f7c2778bec5 100644
--- a/sound/soc/sdca/sdca_asoc.c
+++ b/sound/soc/sdca/sdca_asoc.c
@@ -841,10 +841,8 @@ static int control_limit_kctl(struct device *dev,
 	tlv[2] = (min * 100) >> 8;
 	tlv[3] = (max * 100) >> 8;
 
-	step = (step * 100) >> 8;
-
-	mc->min = ((int)tlv[2] / step);
-	mc->max = ((int)tlv[3] / step);
+	mc->min = min / step;
+	mc->max = max / step;
 	mc->shift = step;
 	mc->sign_bit = 15;
 	mc->sdca_q78 = 1;
diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c
index f966d4e13c7fc..8ae6609ca9618 100644
--- a/sound/soc/soc-ops.c
+++ b/sound/soc/soc-ops.c
@@ -120,25 +120,17 @@ static int sdca_soc_q78_reg_to_ctl(struct soc_mixer_control *mc, unsigned int re
 		return -EINVAL;
 
 	val = sign_extend32(val, mc->sign_bit);
-	val = (((val * 100) >> 8) / (int)mc->shift);
-	val -= mc->min;
 
-	return val & mask;
+	return ((val / mc->shift) - mc->min) & mask;
 }
 
 static unsigned int sdca_soc_q78_ctl_to_reg(struct soc_mixer_control *mc, int val,
 					 unsigned int mask, unsigned int shift, int max)
 {
-	unsigned int ret_val;
-	int reg_val;
-
 	if (WARN_ON(!mc->shift))
 		return -EINVAL;
 
-	reg_val = val + mc->min;
-	ret_val = (int)((reg_val * mc->shift) << 8) / 100;
-
-	return ret_val & mask;
+	return ((val + mc->min) * mc->shift) & mask;
 }
 
 static int soc_mixer_reg_to_ctl(struct soc_mixer_control *mc, unsigned int reg_val,
-- 
2.47.3

Re: [PATCH 3/4] ASoC: SDCA: Improve mapping of Q7.8 SDCA volumes

[Richard Fitzgerald]

On 23/02/2026 9:54 am, Charles Keepax wrote:
> SDCA measures volumes in 256ths of a dB, whereas ALSA measures
> volumes in 100ths of a dB. Currently the SDCA volume controls are
> mapped to ALSA controls by mapping the step size and working out
> the number of steps for this mapped step size. Due to quantization
> of the step size this means the number of steps in the ALSA
> control will rarely match the number of steps in the SDCA control,
> leading to skipped values and multiple values that map to the
> same volume. This is not a huge problem, the volume is still
> increasing and the differences will be small but it is not really
> desirable.
> 
> It is simpler and more accurate to count the number of steps based on
> the SDCA volume levels. This gives a 1-to-1 mapping between control
> values and register volumes. The TLV is based on a minimum and maximum
> volume so still accurately specifies the volume range.
> 
> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> ---
>   sound/soc/sdca/sdca_asoc.c |  6 ++----
>   sound/soc/soc-ops.c        | 12 ++----------
>   2 files changed, 4 insertions(+), 14 deletions(-)
>
Tested-by: Richard Fitzgerald <rf@opensource.cirrus.com>

[PATCH 4/4] ASoC: SDCA: Pull the Q7.8 volume helpers out of soc-ops

[Charles Keepax]

It is cleaner to keep the SDCA code contained and not update the core
code for things that are unlikely to see reuse outside of SDCA. Move the
Q7.8 volume helpers back into the SDCA core code.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 include/sound/soc.h        |  1 -
 sound/soc/sdca/sdca_asoc.c | 67 +++++++++++++++++++++++++++++++++++++-
 sound/soc/soc-ops.c        | 55 ++++++-------------------------
 3 files changed, 76 insertions(+), 47 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 7d8376c8e1bed..172bd68e1315f 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1239,7 +1239,6 @@ struct soc_mixer_control {
 	unsigned int sign_bit;
 	unsigned int invert:1;
 	unsigned int autodisable:1;
-	unsigned int sdca_q78:1;
 #ifdef CONFIG_SND_SOC_TOPOLOGY
 	struct snd_soc_dobj dobj;
 #endif
diff --git a/sound/soc/sdca/sdca_asoc.c b/sound/soc/sdca/sdca_asoc.c
index e6f7c2778bec5..a342a4e56717a 100644
--- a/sound/soc/sdca/sdca_asoc.c
+++ b/sound/soc/sdca/sdca_asoc.c
@@ -805,6 +805,70 @@ int sdca_asoc_populate_dapm(struct device *dev, struct sdca_function_data *funct
 }
 EXPORT_SYMBOL_NS(sdca_asoc_populate_dapm, "SND_SOC_SDCA");
 
+static int q78_write(struct snd_soc_component *component,
+		     struct soc_mixer_control *mc,
+		     unsigned int reg, const int val)
+{
+	unsigned int mask = GENMASK(mc->sign_bit, 0);
+	unsigned int reg_val;
+
+	if (val < 0 || val > mc->max - mc->min)
+		return -EINVAL;
+
+	reg_val = (val + mc->min) * mc->shift;
+
+	return snd_soc_component_update_bits(component, reg, mask, reg_val);
+}
+
+static int q78_put_volsw(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_value *ucontrol)
+{
+	struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value;
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+	int ret;
+
+	ret = q78_write(component, mc, mc->reg, ucontrol->value.integer.value[0]);
+	if (ret < 0)
+		return ret;
+
+	if (snd_soc_volsw_is_stereo(mc)) {
+		int err; /* Don't drop change flag */
+
+		err = q78_write(component, mc, mc->rreg, ucontrol->value.integer.value[1]);
+		if (err)
+			return err;
+	}
+
+	return ret;
+}
+
+static int q78_read(struct snd_soc_component *component,
+		    struct soc_mixer_control *mc, unsigned int reg)
+{
+	unsigned int reg_val;
+	int val;
+
+	reg_val = snd_soc_component_read(component, reg);
+
+	val = (sign_extend32(reg_val, mc->sign_bit) / mc->shift) - mc->min;
+
+	return val & GENMASK(mc->sign_bit, 0);
+}
+
+static int q78_get_volsw(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_value *ucontrol)
+{
+	struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value;
+	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+
+	ucontrol->value.integer.value[0] = q78_read(component, mc, mc->reg);
+
+	if (snd_soc_volsw_is_stereo(mc))
+		ucontrol->value.integer.value[1] = q78_read(component, mc, mc->rreg);
+
+	return 0;
+}
+
 static int control_limit_kctl(struct device *dev,
 			      struct sdca_entity *entity,
 			      struct sdca_control *control,
@@ -845,10 +909,11 @@ static int control_limit_kctl(struct device *dev,
 	mc->max = max / step;
 	mc->shift = step;
 	mc->sign_bit = 15;
-	mc->sdca_q78 = 1;
 
 	kctl->tlv.p = tlv;
 	kctl->access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
+	kctl->get = q78_get_volsw;
+	kctl->put = q78_put_volsw;
 
 	return 0;
 }
diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c
index 8ae6609ca9618..ed76ea81e6ec4 100644
--- a/sound/soc/soc-ops.c
+++ b/sound/soc/soc-ops.c
@@ -110,29 +110,6 @@ int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
 }
 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
 
-static int sdca_soc_q78_reg_to_ctl(struct soc_mixer_control *mc, unsigned int reg_val,
-				   unsigned int mask, unsigned int shift, int max,
-				   bool sx)
-{
-	int val = reg_val;
-
-	if (WARN_ON(!mc->shift))
-		return -EINVAL;
-
-	val = sign_extend32(val, mc->sign_bit);
-
-	return ((val / mc->shift) - mc->min) & mask;
-}
-
-static unsigned int sdca_soc_q78_ctl_to_reg(struct soc_mixer_control *mc, int val,
-					 unsigned int mask, unsigned int shift, int max)
-{
-	if (WARN_ON(!mc->shift))
-		return -EINVAL;
-
-	return ((val + mc->min) * mc->shift) & mask;
-}
-
 static int soc_mixer_reg_to_ctl(struct soc_mixer_control *mc, unsigned int reg_val,
 				unsigned int mask, unsigned int shift, int max,
 				bool sx)
@@ -226,26 +203,17 @@ static int soc_put_volsw(struct snd_kcontrol *kcontrol,
 			 struct snd_ctl_elem_value *ucontrol,
 			 struct soc_mixer_control *mc, int mask, int max)
 {
-	unsigned int (*ctl_to_reg)(struct soc_mixer_control *, int, unsigned int, unsigned int, int);
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	unsigned int val1, val_mask;
 	unsigned int val2 = 0;
 	bool double_r = false;
 	int ret;
 
-	if (mc->sdca_q78) {
-		ctl_to_reg = sdca_soc_q78_ctl_to_reg;
-		val_mask = mask;
-	} else {
-		ctl_to_reg = soc_mixer_ctl_to_reg;
-		val_mask = mask << mc->shift;
-	}
-
 	ret = soc_mixer_valid_ctl(mc, ucontrol->value.integer.value[0], max);
 	if (ret)
 		return ret;
 
-	val1 = ctl_to_reg(mc, ucontrol->value.integer.value[0],
+	val1 = soc_mixer_ctl_to_reg(mc, ucontrol->value.integer.value[0],
 				    mask, mc->shift, max);
 
 	if (snd_soc_volsw_is_stereo(mc)) {
@@ -254,10 +222,14 @@ static int soc_put_volsw(struct snd_kcontrol *kcontrol,
 			return ret;
 
 		if (mc->reg == mc->rreg) {
-			val1 |= ctl_to_reg(mc, ucontrol->value.integer.value[1], mask, mc->rshift, max);
+			val1 |= soc_mixer_ctl_to_reg(mc,
+						     ucontrol->value.integer.value[1],
+						     mask, mc->rshift, max);
 			val_mask |= mask << mc->rshift;
 		} else {
-			val2 = ctl_to_reg(mc, ucontrol->value.integer.value[1], mask, mc->shift, max);
+			val2 = soc_mixer_ctl_to_reg(mc,
+						    ucontrol->value.integer.value[1],
+						    mask, mc->shift, max);
 			double_r = true;
 		}
 	}
@@ -281,28 +253,21 @@ static int soc_get_volsw(struct snd_kcontrol *kcontrol,
 			 struct snd_ctl_elem_value *ucontrol,
 			 struct soc_mixer_control *mc, int mask, int max, bool sx)
 {
-	int (*reg_to_ctl)(struct soc_mixer_control *, unsigned int, unsigned int,
-			  unsigned int, int, bool);
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	unsigned int reg_val;
 	int val;
 
-	if (mc->sdca_q78)
-		reg_to_ctl = sdca_soc_q78_reg_to_ctl;
-	else
-		reg_to_ctl = soc_mixer_reg_to_ctl;
-
 	reg_val = snd_soc_component_read(component, mc->reg);
-	val = reg_to_ctl(mc, reg_val, mask, mc->shift, max, sx);
+	val = soc_mixer_reg_to_ctl(mc, reg_val, mask, mc->shift, max, sx);
 
 	ucontrol->value.integer.value[0] = val;
 
 	if (snd_soc_volsw_is_stereo(mc)) {
 		if (mc->reg == mc->rreg) {
-			val = reg_to_ctl(mc, reg_val, mask, mc->rshift, max, sx);
+			val = soc_mixer_reg_to_ctl(mc, reg_val, mask, mc->rshift, max, sx);
 		} else {
 			reg_val = snd_soc_component_read(component, mc->rreg);
-			val = reg_to_ctl(mc, reg_val, mask, mc->shift, max, sx);
+			val = soc_mixer_reg_to_ctl(mc, reg_val, mask, mc->shift, max, sx);
 		}
 
 		ucontrol->value.integer.value[1] = val;
-- 
2.47.3

Re: [PATCH 4/4] ASoC: SDCA: Pull the Q7.8 volume helpers out of soc-ops

[Richard Fitzgerald]

On 23/02/2026 9:54 am, Charles Keepax wrote:
> It is cleaner to keep the SDCA code contained and not update the core
> code for things that are unlikely to see reuse outside of SDCA. Move the
> Q7.8 volume helpers back into the SDCA core code.
> 
> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> ---
>   include/sound/soc.h        |  1 -
>   sound/soc/sdca/sdca_asoc.c | 67 +++++++++++++++++++++++++++++++++++++-
>   sound/soc/soc-ops.c        | 55 ++++++-------------------------
>   3 files changed, 76 insertions(+), 47 deletions(-)
>
This needs a corresponding update to soc-ops-test.
With this patch I get 104 errors from soc-ops-test.

Re: [PATCH 4/4] ASoC: SDCA: Pull the Q7.8 volume helpers out of soc-ops

[Richard Fitzgerald]

On 23/02/2026 11:43 am, Richard Fitzgerald wrote:
> On 23/02/2026 9:54 am, Charles Keepax wrote:
>> It is cleaner to keep the SDCA code contained and not update the core
>> code for things that are unlikely to see reuse outside of SDCA. Move the
>> Q7.8 volume helpers back into the SDCA core code.
>>
>> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
>> ---
>>   include/sound/soc.h        |  1 -
>>   sound/soc/sdca/sdca_asoc.c | 67 +++++++++++++++++++++++++++++++++++++-
>>   sound/soc/soc-ops.c        | 55 ++++++-------------------------
>>   3 files changed, 76 insertions(+), 47 deletions(-)
>>
> This needs a corresponding update to soc-ops-test.
> With this patch I get 104 errors from soc-ops-test.
Actually it doesn't need a test update. The test is correctly failing
because of an uninitialized variable left by removing the Q7.8 code.

Re: [PATCH 4/4] ASoC: SDCA: Pull the Q7.8 volume helpers out of soc-ops

[Richard Fitzgerald]

On 23/02/2026 9:54 am, Charles Keepax wrote:
> It is cleaner to keep the SDCA code contained and not update the core
> code for things that are unlikely to see reuse outside of SDCA. Move the
> Q7.8 volume helpers back into the SDCA core code.
> 
> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> ---
>   include/sound/soc.h        |  1 -
>   sound/soc/sdca/sdca_asoc.c | 67 +++++++++++++++++++++++++++++++++++++-
>   sound/soc/soc-ops.c        | 55 ++++++-------------------------
>   3 files changed, 76 insertions(+), 47 deletions(-)
> 
> diff --git a/include/sound/soc.h b/include/sound/soc.h
> index 7d8376c8e1bed..172bd68e1315f 100644
> --- a/include/sound/soc.h
> +++ b/include/sound/soc.h
> @@ -1239,7 +1239,6 @@ struct soc_mixer_control {
>   	unsigned int sign_bit;
>   	unsigned int invert:1;
>   	unsigned int autodisable:1;
> -	unsigned int sdca_q78:1;
>   #ifdef CONFIG_SND_SOC_TOPOLOGY
>   	struct snd_soc_dobj dobj;
>   #endif
> diff --git a/sound/soc/sdca/sdca_asoc.c b/sound/soc/sdca/sdca_asoc.c
> index e6f7c2778bec5..a342a4e56717a 100644
> --- a/sound/soc/sdca/sdca_asoc.c
> +++ b/sound/soc/sdca/sdca_asoc.c
> @@ -805,6 +805,70 @@ int sdca_asoc_populate_dapm(struct device *dev, struct sdca_function_data *funct
>   }
>   EXPORT_SYMBOL_NS(sdca_asoc_populate_dapm, "SND_SOC_SDCA");
>   
> +static int q78_write(struct snd_soc_component *component,
> +		     struct soc_mixer_control *mc,
> +		     unsigned int reg, const int val)
> +{
> +	unsigned int mask = GENMASK(mc->sign_bit, 0);
> +	unsigned int reg_val;
> +
> +	if (val < 0 || val > mc->max - mc->min)
> +		return -EINVAL;
> +
> +	reg_val = (val + mc->min) * mc->shift;
> +
> +	return snd_soc_component_update_bits(component, reg, mask, reg_val);
> +}
> +
> +static int q78_put_volsw(struct snd_kcontrol *kcontrol,
> +			 struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value;
> +	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
> +	int ret;
> +
> +	ret = q78_write(component, mc, mc->reg, ucontrol->value.integer.value[0]);
> +	if (ret < 0)
> +		return ret;
> +
> +	if (snd_soc_volsw_is_stereo(mc)) {
> +		int err; /* Don't drop change flag */
> +
> +		err = q78_write(component, mc, mc->rreg, ucontrol->value.integer.value[1]);
> +		if (err)
> +			return err;
> +	}
> +
> +	return ret;
> +}
> +
> +static int q78_read(struct snd_soc_component *component,
> +		    struct soc_mixer_control *mc, unsigned int reg)
> +{
> +	unsigned int reg_val;
> +	int val;
> +
> +	reg_val = snd_soc_component_read(component, reg);
> +
> +	val = (sign_extend32(reg_val, mc->sign_bit) / mc->shift) - mc->min;
> +
> +	return val & GENMASK(mc->sign_bit, 0);
> +}
> +
> +static int q78_get_volsw(struct snd_kcontrol *kcontrol,
> +			 struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value;
> +	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
> +
> +	ucontrol->value.integer.value[0] = q78_read(component, mc, mc->reg);
> +
> +	if (snd_soc_volsw_is_stereo(mc))
> +		ucontrol->value.integer.value[1] = q78_read(component, mc, mc->rreg);
> +
> +	return 0;
> +}
> +
>   static int control_limit_kctl(struct device *dev,
>   			      struct sdca_entity *entity,
>   			      struct sdca_control *control,
> @@ -845,10 +909,11 @@ static int control_limit_kctl(struct device *dev,
>   	mc->max = max / step;
>   	mc->shift = step;
>   	mc->sign_bit = 15;
> -	mc->sdca_q78 = 1;
>   
>   	kctl->tlv.p = tlv;
>   	kctl->access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
> +	kctl->get = q78_get_volsw;
> +	kctl->put = q78_put_volsw;
>   
>   	return 0;
>   }
> diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c
> index 8ae6609ca9618..ed76ea81e6ec4 100644
> --- a/sound/soc/soc-ops.c
> +++ b/sound/soc/soc-ops.c
> @@ -110,29 +110,6 @@ int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
>   }
>   EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
>   
> -static int sdca_soc_q78_reg_to_ctl(struct soc_mixer_control *mc, unsigned int reg_val,
> -				   unsigned int mask, unsigned int shift, int max,
> -				   bool sx)
> -{
> -	int val = reg_val;
> -
> -	if (WARN_ON(!mc->shift))
> -		return -EINVAL;
> -
> -	val = sign_extend32(val, mc->sign_bit);
> -
> -	return ((val / mc->shift) - mc->min) & mask;
> -}
> -
> -static unsigned int sdca_soc_q78_ctl_to_reg(struct soc_mixer_control *mc, int val,
> -					 unsigned int mask, unsigned int shift, int max)
> -{
> -	if (WARN_ON(!mc->shift))
> -		return -EINVAL;
> -
> -	return ((val + mc->min) * mc->shift) & mask;
> -}
> -
>   static int soc_mixer_reg_to_ctl(struct soc_mixer_control *mc, unsigned int reg_val,
>   				unsigned int mask, unsigned int shift, int max,
>   				bool sx)
> @@ -226,26 +203,17 @@ static int soc_put_volsw(struct snd_kcontrol *kcontrol,
>   			 struct snd_ctl_elem_value *ucontrol,
>   			 struct soc_mixer_control *mc, int mask, int max)
>   {
> -	unsigned int (*ctl_to_reg)(struct soc_mixer_control *, int, unsigned int, unsigned int, int);
>   	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
>   	unsigned int val1, val_mask;
>   	unsigned int val2 = 0;
>   	bool double_r = false;
>   	int ret;
>   
> -	if (mc->sdca_q78) {
> -		ctl_to_reg = sdca_soc_q78_ctl_to_reg;
> -		val_mask = mask;
> -	} else {
> -		ctl_to_reg = soc_mixer_ctl_to_reg;
> -		val_mask = mask << mc->shift;
Still need this line to initialize val_mask.

Re: [PATCH 4/4] ASoC: SDCA: Pull the Q7.8 volume helpers out of soc-ops

[Charles Keepax]

On Tue, Feb 24, 2026 at 01:55:16PM +0000, Richard Fitzgerald wrote:
> On 23/02/2026 9:54 am, Charles Keepax wrote:
> > It is cleaner to keep the SDCA code contained and not update the core
> > code for things that are unlikely to see reuse outside of SDCA. Move the
> > Q7.8 volume helpers back into the SDCA core code.
> > 
> > Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> > ---
> > @@ -226,26 +203,17 @@ static int soc_put_volsw(struct snd_kcontrol *kcontrol,
> >   			 struct snd_ctl_elem_value *ucontrol,
> >   			 struct soc_mixer_control *mc, int mask, int max)
> >   {
> > -	unsigned int (*ctl_to_reg)(struct soc_mixer_control *, int, unsigned int, unsigned int, int);
> >   	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
> >   	unsigned int val1, val_mask;
> >   	unsigned int val2 = 0;
> >   	bool double_r = false;
> >   	int ret;
> > -	if (mc->sdca_q78) {
> > -		ctl_to_reg = sdca_soc_q78_ctl_to_reg;
> > -		val_mask = mask;
> > -	} else {
> > -		ctl_to_reg = soc_mixer_ctl_to_reg;
> > -		val_mask = mask << mc->shift;
> Still need this line to initialize val_mask.

Thanks Richard, will get that fixed up today.

Thanks,
Charles

Re: [PATCH 0/4] SDCA Improvements

[Pierre-Louis Bossart]

On 2/23/26 10:54, Charles Keepax wrote:
> Another fairly mixed bag of small SDCA fixes/improvements. Fix one DisCo
> property that was treated as mandatory but is actually not present in
> the first version of the specification. Fix the counting of routes for
> SU/GE DAPM widgets, this currently makes assumptions that are not
> guaranteed to be true which can result in too many/few DAPM routes.

Both valid changes indeed.

> Then finally a couple improvements to the volume controls, simplify the
> mapping between ALSA and SDCA volumes and pull the volume stuff back
> into the SDCA code. It just wasn't sitting right with me that it was
> being handled in the ASoC core given it is unlikely to ever see any
> reuse outside of SDCA.

Sounds good to me as well.

> Charles Keepax (4):
>   ASoC: SDCA: Add default value for mipi-sdca-function-reset-max-delay
>   ASoC: SDCA: Update counting of SU/GE DAPM routes
>   ASoC: SDCA: Improve mapping of Q7.8 SDCA volumes
>   ASoC: SDCA: Pull the Q7.8 volume helpers out of soc-ops

For the patchset,

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>

> 
>  include/sound/soc.h             |   1 -
>  sound/soc/sdca/sdca_asoc.c      | 114 ++++++++++++++++++++++++++++----
>  sound/soc/sdca/sdca_fdl.c       |   5 --
>  sound/soc/sdca/sdca_functions.c |   6 +-
>  sound/soc/soc-ops.c             |  63 +++---------------
>  5 files changed, 117 insertions(+), 72 deletions(-)
> 

Re: [PATCH 0/4] SDCA Improvements

[Mark Brown]

On Mon, 23 Feb 2026 09:54:21 +0000, Charles Keepax wrote:
> Another fairly mixed bag of small SDCA fixes/improvements. Fix one DisCo
> property that was treated as mandatory but is actually not present in
> the first version of the specification. Fix the counting of routes for
> SU/GE DAPM widgets, this currently makes assumptions that are not
> guaranteed to be true which can result in too many/few DAPM routes.
> 
> Then finally a couple improvements to the volume controls, simplify the
> mapping between ALSA and SDCA volumes and pull the volume stuff back
> into the SDCA code. It just wasn't sitting right with me that it was
> being handled in the ASoC core given it is unlikely to ever see any
> reuse outside of SDCA.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/4] ASoC: SDCA: Add default value for mipi-sdca-function-reset-max-delay
      commit: 1bbbda5b178a1399339139eb3c326300008b72d6
[2/4] ASoC: SDCA: Update counting of SU/GE DAPM routes
      commit: 1fb720d33eecdb9a90ee340b3000ba378d49f5ca
[3/4] ASoC: SDCA: Improve mapping of Q7.8 SDCA volumes
      commit: d4f7d5a9a0f963dc895c18084425ce332a80d3a8
[4/4] ASoC: SDCA: Pull the Q7.8 volume helpers out of soc-ops
      commit: 501efdcb3b3ab099fc0ce2f6e668b1c4095dd476

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark