tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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/device.h>
11#include <linux/dmi.h>
12#include <linux/module.h>
13#include <linux/property.h>
14#include <linux/soundwire/sdw.h>
15#include <sound/sdca.h>
16#include <sound/sdca_function.h>
17
18void sdca_lookup_interface_revision(struct sdw_slave *slave)
19{
20 struct fwnode_handle *fwnode = slave->dev.fwnode;
21
22 /*
23 * if this property is not present, then the sdca_interface_revision will
24 * remain zero, which will be considered as 'not defined' or 'invalid'.
25 */
26 fwnode_property_read_u32(fwnode, "mipi-sdw-sdca-interface-revision",
27 &slave->sdca_data.interface_revision);
28}
29EXPORT_SYMBOL_NS(sdca_lookup_interface_revision, "SND_SOC_SDCA");
30
31static void devm_acpi_table_put(void *ptr)
32{
33 acpi_put_table((struct acpi_table_header *)ptr);
34}
35
36void sdca_lookup_swft(struct sdw_slave *slave)
37{
38 acpi_status status;
39
40 status = acpi_get_table(ACPI_SIG_SWFT, 0,
41 (struct acpi_table_header **)&slave->sdca_data.swft);
42 if (ACPI_FAILURE(status))
43 dev_info(&slave->dev, "SWFT not available\n");
44 else
45 devm_add_action_or_reset(&slave->dev, devm_acpi_table_put,
46 &slave->sdca_data.swft);
47}
48EXPORT_SYMBOL_NS(sdca_lookup_swft, "SND_SOC_SDCA");
49
50static bool sdca_device_quirk_rt712_vb(struct sdw_slave *slave)
51{
52 struct sdw_slave_id *id = &slave->id;
53 int i;
54
55 /*
56 * The RT712_VA relies on the v06r04 draft, and the
57 * RT712_VB on a more recent v08r01 draft.
58 */
59 if (slave->sdca_data.interface_revision < 0x0801)
60 return false;
61
62 if (id->mfg_id != 0x025d)
63 return false;
64
65 if (id->part_id != 0x712 &&
66 id->part_id != 0x713 &&
67 id->part_id != 0x716 &&
68 id->part_id != 0x717)
69 return false;
70
71 for (i = 0; i < slave->sdca_data.num_functions; i++) {
72 if (slave->sdca_data.function[i].type == SDCA_FUNCTION_TYPE_SMART_MIC)
73 return true;
74 }
75
76 return false;
77}
78
79static bool sdca_device_quirk_skip_func_type_patching(struct sdw_slave *slave)
80{
81 const char *vendor, *sku;
82
83 vendor = dmi_get_system_info(DMI_SYS_VENDOR);
84 sku = dmi_get_system_info(DMI_PRODUCT_SKU);
85
86 if (vendor && sku &&
87 !strcmp(vendor, "Dell Inc.") &&
88 (!strcmp(sku, "0C62") || !strcmp(sku, "0C63") || !strcmp(sku, "0C6B")) &&
89 slave->sdca_data.interface_revision == 0x061c &&
90 slave->id.mfg_id == 0x01fa && slave->id.part_id == 0x4243)
91 return true;
92
93 return false;
94}
95
96bool sdca_device_quirk_match(struct sdw_slave *slave, enum sdca_quirk quirk)
97{
98 switch (quirk) {
99 case SDCA_QUIRKS_RT712_VB:
100 return sdca_device_quirk_rt712_vb(slave);
101 case SDCA_QUIRKS_SKIP_FUNC_TYPE_PATCHING:
102 return sdca_device_quirk_skip_func_type_patching(slave);
103 default:
104 break;
105 }
106 return false;
107}
108EXPORT_SYMBOL_NS(sdca_device_quirk_match, "SND_SOC_SDCA");