On Fri, 22 Sep 2023, Shyam Sundar S K wrote:
> From: Basavaraj Natikar <basavaraj.nati...@amd.com>
>
> 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 PMF and AMDSFH interface to get this information.
>
> Co-developed-by: Shyam Sundar S K <shyam-sundar....@amd.com>
> Signed-off-by: Shyam Sundar S K <shyam-sundar....@amd.com>
> Signed-off-by: Basavaraj Natikar <basavaraj.nati...@amd.com>
> ---
> drivers/hid/amd-sfh-hid/amd_sfh_common.h | 5 ++++
> drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c | 2 +-
> drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c | 11 ++++++++
> .../amd-sfh-hid/sfh1_1/amd_sfh_interface.c | 28 +++++++++++++++++++
> .../amd-sfh-hid/sfh1_1/amd_sfh_interface.h | 1 +
> drivers/platform/x86/amd/pmf/spc.c | 21 ++++++++++++++
> include/linux/amd-pmf-io.h | 22 ++++++++++++++-
> 7 files changed, 88 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_common.h
> b/drivers/hid/amd-sfh-hid/amd_sfh_common.h
> index 2643bb14fee2..cd57037bf217 100644
> --- a/drivers/hid/amd-sfh-hid/amd_sfh_common.h
> +++ b/drivers/hid/amd-sfh-hid/amd_sfh_common.h
> @@ -37,6 +37,10 @@ struct amd_mp2_sensor_info {
> dma_addr_t dma_address;
> };
>
> +struct sfh_dev_status {
> + bool is_hpd_present;
> +};
> +
> struct amd_mp2_dev {
> struct pci_dev *pdev;
> struct amdtp_cl_data *cl_data;
> @@ -47,6 +51,7 @@ struct amd_mp2_dev {
> struct amd_input_data in_data;
> /* mp2 active control status */
> u32 mp2_acs;
> + struct sfh_dev_status dev_en;
> };
>
> struct amd_mp2_ops {
> diff --git a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c
> b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c
> index 06bdcf072d10..d7467c41ad3b 100644
> --- a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c
> +++ b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c
> @@ -132,7 +132,7 @@ static void get_common_inputs(struct
> common_input_property *common, int report_i
> common->event_type = HID_USAGE_SENSOR_EVENT_DATA_UPDATED_ENUM;
> }
>
> -static int float_to_int(u32 flt32_val)
> +int float_to_int(u32 flt32_val)
This is way too generic name to be exposed by a driver, add proper
prefix for it to make sure it never hits a compile problem.
> {
> int fraction, shift, mantissa, sign, exp, zeropre;
>
> diff --git a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c
> b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c
> index e9c6413af24a..9c623456ee12 100644
> --- a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c
> +++ b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_init.c
> @@ -73,6 +73,12 @@ static int amd_sfh_hid_client_deinit(struct amd_mp2_dev
> *privdata)
> int i, status;
>
> for (i = 0; i < cl_data->num_hid_devices; i++) {
> + switch (cl_data->sensor_idx[i]) {
> + case HPD_IDX:
> + privdata->dev_en.is_hpd_present = false;
> + break;
> + }
> +
> if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
> privdata->mp2_ops->stop(privdata,
> cl_data->sensor_idx[i]);
> status = amd_sfh_wait_for_response
> @@ -178,6 +184,11 @@ static int amd_sfh1_1_hid_client_init(struct amd_mp2_dev
> *privdata)
> rc = amdtp_hid_probe(i, cl_data);
> if (rc)
> goto cleanup;
> + switch (cl_data->sensor_idx[i]) {
> + case HPD_IDX:
> + privdata->dev_en.is_hpd_present = true;
> + break;
> + }
> }
> dev_dbg(dev, "sid 0x%x (%s) status 0x%x\n",
> cl_data->sensor_idx[i],
> get_sensor_name(cl_data->sensor_idx[i]),
> 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..63a5bbca5a09 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.nati...@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;
> @@ -76,4 +79,29 @@ static struct amd_mp2_ops amd_sfh_ops = {
> 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)
> +{
> + if (emp2 && emp2->dev_en.is_hpd_present) {
> + struct hpd_status hpdstatus;
> +
> + hpdstatus.val = readl(emp2->mmio + AMD_C2P_MSG(4));
> + *user_present = hpdstatus.shpd.presence;
> + return 0;
> + }
> + return -ENODEV;
> +}
> +
> +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 -1;
> }
> +EXPORT_SYMBOL_GPL(amd_get_sfh_info);
> diff --git a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.h
> b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.h
> index 9d31d5b510eb..8a36386e6bce 100644
> --- a/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.h
> +++ b/drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_interface.h
> @@ -149,6 +149,7 @@ struct hpd_status {
> };
> };
>
> +int float_to_int(u32 flt32_val);
> void sfh_interface_init(struct amd_mp2_dev *mp2);
> void amd_sfh1_1_set_desc_ops(struct amd_mp2_ops *mp2_ops);
> #endif
> diff --git a/drivers/platform/x86/amd/pmf/spc.c
> b/drivers/platform/x86/amd/pmf/spc.c
> index 5f3ab1ce09d2..97293ae25cf5 100644
> --- a/drivers/platform/x86/amd/pmf/spc.c
> +++ b/drivers/platform/x86/amd/pmf/spc.c
> @@ -48,6 +48,7 @@ void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct
> ta_pmf_enact_table *
> dev_dbg(dev->dev, "Primary Display State : %s\n",
> in->ev_info.display_state ?
> "Connected" : "disconnected/unknown");
> dev_dbg(dev->dev, "LID State : %s\n", in->ev_info.lid_state ? "Close" :
> "Open");
> + dev_dbg(dev->dev, "User Presence : %s\n", in->ev_info.user_present ?
> "Present" : "Away");
> dev_dbg(dev->dev, "==== TA inputs END ====\n");
> }
> #else
> @@ -156,6 +157,25 @@ static void amd_pmf_get_gpu_info(struct amd_pmf_dev
> *dev, struct ta_pmf_enact_ta
> in->ev_info.display_state = dev->gfx_data.con_status[0];
> }
>
> +static void amd_pmf_get_sensor_info(struct amd_pmf_dev *dev, struct
> ta_pmf_enact_table *in)
> +{
> + struct amd_sfh_info sfh_info;
> +
> + /* get HPD data */
> + amd_get_sfh_info(&sfh_info, MT_HPD);
> + switch (sfh_info.user_present) {
> + case SFH_NOT_DETECTED:
> + in->ev_info.user_present = 0xff; /* assume no sensors connected
> */
> + break;
> + case SFH_USER_PRESENT:
> + in->ev_info.user_present = 1;
> + break;
> + case SFH_USER_AWAY:
> + in->ev_info.user_present = 0;
> + break;
> + }
> +}
> +
> void amd_pmf_populate_ta_inputs(struct amd_pmf_dev *dev, struct
> ta_pmf_enact_table *in)
> {
> /* TA side lid open is 1 and close is 0, hence the ! here */
> @@ -165,4 +185,5 @@ void amd_pmf_populate_ta_inputs(struct amd_pmf_dev *dev,
> struct ta_pmf_enact_tab
> amd_pmf_get_battery_info(dev, in);
> amd_pmf_get_slider_info(dev, in);
> amd_pmf_get_gpu_info(dev, in);
> + amd_pmf_get_sensor_info(dev, in);
> }
> diff --git a/include/linux/amd-pmf-io.h b/include/linux/amd-pmf-io.h
> index ecae387ddaa6..4f82973f6ad2 100644
> --- a/include/linux/amd-pmf-io.h
> +++ b/include/linux/amd-pmf-io.h
> @@ -5,7 +5,8 @@
> * Copyright (c) 2023, Advanced Micro Devices, Inc.
> * All Rights Reserved.
> *
> - * Author: Shyam Sundar S K <shyam-sundar....@amd.com>
> + * Authors: Shyam Sundar S K <shyam-sundar....@amd.com>
> + * Basavaraj Natikar <basavaraj.nati...@amd.com>
> */
>
> #ifndef AMD_PMF_IO_H
> @@ -26,4 +27,23 @@ struct amd_gpu_pmf_data {
>
> int amd_pmf_get_gfx_data(struct amd_gpu_pmf_data *pmf);
> int amd_pmf_set_gfx_data(struct amd_gpu_pmf_data *pmf);
> +
> +/* amd-sfh */
> +enum sfh_message_type {
> + MT_HPD,
> +};
> +
> +enum hpd_info {
> + SFH_NOT_DETECTED,
> + SFH_USER_PRESENT,
> + SFH_USER_AWAY
> +};
> +
> +struct amd_sfh_info {
> + u8 user_present;
> + /* add future caps below */
Remove the comment?
> +};
> +
> +int amd_get_sfh_info(struct amd_sfh_info *sfh_info, enum sfh_message_type
> op);
> +
> #endif
>
--
i.
