diff options
| author | Basavaraj Natikar <Basavaraj.Natikar@amd.com> | 2023-12-20 10:00:41 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.com> | 2024-01-04 17:19:17 +0300 |
| commit | b5b0774d53bb81bddbf8c609b3f183d4af6e91da (patch) | |
| tree | fef42bf8fa3bfccce75d6118ca81062b7c39f5b9 /drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.c | |
| parent | 4e71d262899d7bab1f0c65936a2e639afeb83e4d (diff) | |
| download | linux-b5b0774d53bb81bddbf8c609b3f183d4af6e91da.tar.xz | |
HID: amd_sfh: Add a new interface for exporting HPD data
AMDSFH has information about the User presence information via the Human
Presence Detection (HPD) sensor which is part of the AMD sensor fusion hub.
Add a new interface to export this information, where other drivers like
PMF can use this information to enhance user experiences.
Link: https://lore.kernel.org/all/ad064333-48a4-4cfa-9428-69e8a7c44667@redhat.com/
Co-developed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Diffstat (limited to 'drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.c')
| -rw-r--r-- | drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.c b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.c index 4f81ef2d4f56..197b828fc6a0 100644 --- a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.c +++ b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.c @@ -7,11 +7,14 @@ * * Author: Basavaraj Natikar <Basavaraj.Natikar@amd.com> */ +#include <linux/amd-pmf-io.h> #include <linux/io-64-nonatomic-lo-hi.h> #include <linux/iopoll.h> #include "amd_sfh_interface.h" +static struct amd_mp2_dev *emp2; + static int amd_sfh_wait_response(struct amd_mp2_dev *mp2, u8 sid, u32 cmd_id) { struct sfh_cmd_response cmd_resp; @@ -73,7 +76,41 @@ static struct amd_mp2_ops amd_sfh_ops = { .response = amd_sfh_wait_response, }; +void sfh_deinit_emp2(void) +{ + emp2 = NULL; +} + void sfh_interface_init(struct amd_mp2_dev *mp2) { mp2->mp2_ops = &amd_sfh_ops; + emp2 = mp2; +} + +static int amd_sfh_hpd_info(u8 *user_present) +{ + struct hpd_status hpdstatus; + + if (!user_present) + return -EINVAL; + + if (!emp2 || !emp2->dev_en.is_hpd_present) + return -ENODEV; + + hpdstatus.val = readl(emp2->mmio + AMD_C2P_MSG(4)); + *user_present = hpdstatus.shpd.presence; + + return 0; +} + +int amd_get_sfh_info(struct amd_sfh_info *sfh_info, enum sfh_message_type op) +{ + if (sfh_info) { + switch (op) { + case MT_HPD: + return amd_sfh_hpd_info(&sfh_info->user_present); + } + } + return -EINVAL; } +EXPORT_SYMBOL_GPL(amd_get_sfh_info); |