Re: [PATCH 1/2] platform/x86/amd/pmf: Get Human presence information from AMD SFH driver

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On 1/23/2024 08:14, Shyam Sundar S K wrote:
AMD SFH driver has APIs defined to export the human presence information;
use this within the PMF driver to send inputs to the PMF TA, so that PMF
driver can enact to the actions coming from the TA.

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx>
Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
  drivers/platform/x86/amd/pmf/Kconfig |  1 +
  drivers/platform/x86/amd/pmf/spc.c   | 28 ++++++++++++++++++++++++++++
  2 files changed, 29 insertions(+)

diff --git a/drivers/platform/x86/amd/pmf/Kconfig b/drivers/platform/x86/amd/pmf/Kconfig
index f246252bddd8..f4fa8bd8bda8 100644
--- a/drivers/platform/x86/amd/pmf/Kconfig
+++ b/drivers/platform/x86/amd/pmf/Kconfig
@@ -10,6 +10,7 @@ config AMD_PMF
  	depends on AMD_NB
  	select ACPI_PLATFORM_PROFILE
  	depends on TEE && AMDTEE
+	depends on AMD_SFH_HID
  	help
  	  This driver provides support for the AMD Platform Management Framework.
  	  The goal is to enhance end user experience by making AMD PCs smarter,
diff --git a/drivers/platform/x86/amd/pmf/spc.c b/drivers/platform/x86/amd/pmf/spc.c
index a0423942f771..87ae7c41c9f8 100644
--- a/drivers/platform/x86/amd/pmf/spc.c
+++ b/drivers/platform/x86/amd/pmf/spc.c
@@ -10,6 +10,7 @@
   */
#include <acpi/button.h>
+#include <linux/amd-pmf-io.h>
  #include <linux/power_supply.h>
  #include <linux/units.h>
  #include "pmf.h"
@@ -44,6 +45,7 @@ void amd_pmf_dump_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *
  	dev_dbg(dev->dev, "Max C0 Residency: %u\n", in->ev_info.max_c0residency);
  	dev_dbg(dev->dev, "GFX Busy: %u\n", in->ev_info.gfx_busy);
  	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
@@ -147,6 +149,31 @@ static int amd_pmf_get_slider_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_
  	return 0;
  }
+static int amd_pmf_get_sensor_info(struct amd_pmf_dev *dev, struct ta_pmf_enact_table *in)
+{
+	struct amd_sfh_info sfh_info;
+	int ret;
+
+	/* get HPD data */
+	ret = amd_get_sfh_info(&sfh_info, MT_HPD);
+	if (ret)
+		return ret;
+
+	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;
+	}
+
+	return 0;
+}
+
  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 */
@@ -155,4 +182,5 @@ void amd_pmf_populate_ta_inputs(struct amd_pmf_dev *dev, struct ta_pmf_enact_tab
  	amd_pmf_get_smu_info(dev, in);
  	amd_pmf_get_battery_info(dev, in);
  	amd_pmf_get_slider_info(dev, in);
+	amd_pmf_get_sensor_info(dev, in);
  }





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