Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/soc/sdca/sdca_device.c
29266 views
1
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)

2
// Copyright(c) 2024 Intel Corporation

3


4
/*

5
 * The MIPI SDCA specification is available for public downloads at

6
 * https://www.mipi.org/mipi-sdca-v1-0-download

7
 */

8


9
#include <linux/acpi.h>

10
#include <linux/dmi.h>

11
#include <linux/module.h>

12
#include <linux/property.h>

13
#include <linux/soundwire/sdw.h>

14
#include <sound/sdca.h>

15
#include <sound/sdca_function.h>

16


17
void sdca_lookup_interface_revision(struct sdw_slave *slave)

18
{

19
	struct fwnode_handle *fwnode = slave->dev.fwnode;

20


21
	/*

22
	 * if this property is not present, then the sdca_interface_revision will

23
	 * remain zero, which will be considered as 'not defined' or 'invalid'.

24
	 */

25
	fwnode_property_read_u32(fwnode, "mipi-sdw-sdca-interface-revision",

26
				 &slave->sdca_data.interface_revision);

27
}

28
EXPORT_SYMBOL_NS(sdca_lookup_interface_revision, "SND_SOC_SDCA");

29


30
static bool sdca_device_quirk_rt712_vb(struct sdw_slave *slave)

31
{

32
	struct sdw_slave_id *id = &slave->id;

33
	int i;

34


35
	/*

36
	 * The RT712_VA relies on the v06r04 draft, and the

37
	 * RT712_VB on a more recent v08r01 draft.

38
	 */

39
	if (slave->sdca_data.interface_revision < 0x0801)

40
		return false;

41


42
	if (id->mfg_id != 0x025d)

43
		return false;

44


45
	if (id->part_id != 0x712 &&

46
	    id->part_id != 0x713 &&

47
	    id->part_id != 0x716 &&

48
	    id->part_id != 0x717)

49
		return false;

50


51
	for (i = 0; i < slave->sdca_data.num_functions; i++) {

52
		if (slave->sdca_data.function[i].type == SDCA_FUNCTION_TYPE_SMART_MIC)

53
			return true;

54
	}

55


56
	return false;

57
}

58


59
static bool sdca_device_quirk_skip_func_type_patching(struct sdw_slave *slave)

60
{

61
	const char *vendor, *sku;

62


63
	vendor = dmi_get_system_info(DMI_SYS_VENDOR);

64
	sku = dmi_get_system_info(DMI_PRODUCT_SKU);

65


66
	if (vendor && sku &&

67
	    !strcmp(vendor, "Dell Inc.") &&

68
	    (!strcmp(sku, "0C62") || !strcmp(sku, "0C63") || !strcmp(sku, "0C6B")) &&

69
	    slave->sdca_data.interface_revision == 0x061c &&

70
	    slave->id.mfg_id == 0x01fa && slave->id.part_id == 0x4243)

71
		return true;

72


73
	return false;

74
}

75


76
bool sdca_device_quirk_match(struct sdw_slave *slave, enum sdca_quirk quirk)

77
{

78
	switch (quirk) {

79
	case SDCA_QUIRKS_RT712_VB:

80
		return sdca_device_quirk_rt712_vb(slave);

81
	case SDCA_QUIRKS_SKIP_FUNC_TYPE_PATCHING:

82
		return sdca_device_quirk_skip_func_type_patching(slave);

83
	default:

84
		break;

85
	}

86
	return false;

87
}

88
EXPORT_SYMBOL_NS(sdca_device_quirk_match, "SND_SOC_SDCA");

89


90