On Mon, 31 Jul 2023 20:14:38 +0100, Mark Brown wrote:
On Mon, Jul 31, 2023 at 11:28:28AM +0800, Hal Feng wrote:
+static const struct jh7110_ct_pwmdac pwmdac_ct_data_shift[] = {
- { .name = "left 0 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_0 },
- { .name = "left 1 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_1 },
- { .name = "left 2 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_2 },
- { .name = "left 3 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_3 },
- { .name = "left 4 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_4 },
- { .name = "left 5 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_5 },
- { .name = "left 6 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_6 },
- { .name = "left 7 bit", .vals = PWMDAC_DATA_LEFT_SHIFT_BIT_7 }
+};
It's not clear to me why this is user selectable - what does the control do?
It's convenient to change the register values in user space with the control. But actually using fixed register configuration is enough. I will drop all these control in the next version.
+static int jh7110_pwmdac_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol,int pwmdac_ct)+{
- struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
- struct jh7110_pwmdac_dev *dev = snd_soc_component_get_drvdata(component);
- int sel = ucontrol->value.enumerated.item[0];
- unsigned int items;
- if (pwmdac_ct == PWMDAC_CT_SHIFT)
dev->shift = pwmdac_ct_shift[sel].vals;- else if (pwmdac_ct == PWMDAC_CT_DUTY_CYCLE)
dev->duty_cycle = pwmdac_ct_duty_cycle[sel].vals;- else if (pwmdac_ct == PWMDAC_CT_DATA_CHANGE)
dev->data_change = pwmdac_ct_data_change[sel].vals;- else if (pwmdac_ct == PWMDAC_CT_DATA_MODE)
dev->data_mode = pwmdac_ct_data_mode[sel].vals;- else if (pwmdac_ct == PWMDAC_CT_DATA_SHIFT)
dev->data_shift = pwmdac_ct_data_shift[sel].vals;- return 0;
+}
_put() operations should return 1 if the control value changes so event generation works - please test a card using this driver with the mixer-test selftest, it'll identify this and a bunch of other potential issues.
Thanks for the correct, but it doesn't matter as I will drop these control later.
+static int jh7110_pwmdac_component_probe(struct snd_soc_component *component) +{
- snd_soc_add_component_controls(component, jh7110_pwmdac_snd_controls,
ARRAY_SIZE(jh7110_pwmdac_snd_controls));- return 0;
+}
The driver can just point to the controls from the _driver struct and skip having a probe() function.
Thanks for your advice, but I would like to drop these control later.
Thanks again for your review.
Best regards, Hal