sound/soc/codecs/rt722-sdca-sdw.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/rt722-sdca-sdw.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/rt722-sdca-sdw.c
Extension
.c
Size
18079 bytes
Lines
583
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (rt722->hs_jack) {
		/*
		 * Due to the SCP_SDCA_INTMASK will be cleared by any reset, and then
		 * if the device attached again, we will need to set the setting back.
		 * It could avoid losing the jack detection interrupt.
		 * This also could sync with the cache value as the rt722_sdca_jack_init set.
		 */
			sdw_write_no_pm(rt722->slave, SDW_SCP_SDCA_INTMASK1,
				SDW_SCP_SDCA_INTMASK_SDCA_0);
			sdw_write_no_pm(rt722->slave, SDW_SCP_SDCA_INTMASK2,
				SDW_SCP_SDCA_INTMASK_SDCA_8);
		}
	}

	/*
	 * Perform initialization only if slave status is present and
	 * hw_init flag is false
	 */
	if (rt722->hw_init || status != SDW_SLAVE_ATTACHED)
		return 0;

	/* perform I/O transfers required for Slave initialization */
	return rt722_sdca_io_init(&slave->dev, slave);
}

static int rt722_sdca_read_prop(struct sdw_slave *slave)
{
	struct sdw_slave_prop *prop = &slave->prop;
	int nval;
	int i, j;
	u32 bit;
	unsigned long addr;
	struct sdw_dpn_prop *dpn;

	sdw_slave_read_lane_mapping(slave);

	prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
	prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;

	prop->paging_support = true;

	/*
	 * port = 1 for headphone playback
	 * port = 2 for headset-mic capture
	 * port = 3 for speaker playback
	 * port = 6 for digital-mic capture
	 */
	prop->source_ports = BIT(6) | BIT(2); /* BITMAP: 01000100 */
	prop->sink_ports = BIT(3) | BIT(1); /* BITMAP:  00001010 */

	nval = hweight32(prop->source_ports);
	prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
		sizeof(*prop->src_dpn_prop), GFP_KERNEL);
	if (!prop->src_dpn_prop)
		return -ENOMEM;

	i = 0;
	dpn = prop->src_dpn_prop;
	addr = prop->source_ports;
	for_each_set_bit(bit, &addr, 32) {
		dpn[i].num = bit;
		dpn[i].type = SDW_DPN_FULL;
		dpn[i].simple_ch_prep_sm = true;
		dpn[i].ch_prep_timeout = 10;
		i++;
	}

	/* do this again for sink now */
	nval = hweight32(prop->sink_ports);
	prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
		sizeof(*prop->sink_dpn_prop), GFP_KERNEL);
	if (!prop->sink_dpn_prop)
		return -ENOMEM;

	j = 0;
	dpn = prop->sink_dpn_prop;
	addr = prop->sink_ports;
	for_each_set_bit(bit, &addr, 32) {
		dpn[j].num = bit;
		dpn[j].type = SDW_DPN_FULL;
		dpn[j].simple_ch_prep_sm = true;
		dpn[j].ch_prep_timeout = 10;
		j++;
	}

	/* set the timeout values */
	prop->clk_stop_timeout = 900;

	/* wake-up event */
	prop->wake_capable = 1;

Annotation

Implementation Notes