[PATCH v2 RESEND 04/11] platform/x86/amd/pmf: Add debugfs information

[Shyam Sundar S K <Shyam-sundar.S-k@amd.com>]

Add debugfs support to the PMF driver so that using this interface the
live counters from the PMFW can be queried to see if the power parameters
are getting set properly when a certain power mode change happens.

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
---
 drivers/platform/x86/amd/pmf/core.c | 36 +++++++++++++++++++++++++++++
 drivers/platform/x86/amd/pmf/pmf.h  |  1 +
 2 files changed, 37 insertions(+)

diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c
index b6006e8ee1a1..4ce69864879a 100644
--- a/drivers/platform/x86/amd/pmf/core.c
+++ b/drivers/platform/x86/amd/pmf/core.c
@@ -8,6 +8,7 @@
  * Author: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
  */
 
+#include <linux/debugfs.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
 #include <linux/pci.h>
@@ -46,6 +47,39 @@
 #define DELAY_MIN_US	2000
 #define DELAY_MAX_US	3000
 
+static int current_power_limits_show(struct seq_file *seq, void *unused)
+{
+	struct amd_pmf_dev *dev = seq->private;
+	struct amd_pmf_static_slider_granular table;
+	int mode, src = 0;
+
+	mode = amd_pmf_get_pprof_modes(dev);
+	src = amd_pmf_get_power_source();
+	amd_pmf_update_slider(dev, SLIDER_OP_GET, mode, &table);
+	seq_printf(seq, "spl:%u fppt:%u sppt:%u sppt_apu_only:%u stt_min:%u stt[APU]:%u stt[HS2]: %u\n",
+		   table.prop[src][mode].spl,
+		   table.prop[src][mode].fppt,
+		   table.prop[src][mode].sppt,
+		   table.prop[src][mode].sppt_apu_only,
+		   table.prop[src][mode].stt_min,
+		   table.prop[src][mode].stt_skin_temp[STT_TEMP_APU],
+		   table.prop[src][mode].stt_skin_temp[STT_TEMP_HS2]);
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(current_power_limits);
+
+static void amd_pmf_dbgfs_unregister(struct amd_pmf_dev *dev)
+{
+	debugfs_remove_recursive(dev->dbgfs_dir);
+}
+
+static void amd_pmf_dbgfs_register(struct amd_pmf_dev *dev)
+{
+	dev->dbgfs_dir = debugfs_create_dir("amd_pmf", NULL);
+	debugfs_create_file("current_power_limits", 0644, dev->dbgfs_dir, dev,
+			    &current_power_limits_fops);
+}
+
 int amd_pmf_get_power_source(void)
 {
 	if (power_supply_is_system_supplied() > 0)
@@ -231,6 +265,7 @@ static int amd_pmf_probe(struct platform_device *pdev)
 	apmf_acpi_init(dev);
 	platform_set_drvdata(pdev, dev);
 	amd_pmf_init_features(dev);
+	amd_pmf_dbgfs_register(dev);
 
 	mutex_init(&dev->lock);
 	dev_info(dev->dev, "registered PMF device successfully\n");
@@ -244,6 +279,7 @@ static int amd_pmf_remove(struct platform_device *pdev)
 
 	mutex_destroy(&dev->lock);
 	amd_pmf_deinit_features(dev);
+	amd_pmf_dbgfs_unregister(dev);
 	kfree(dev->buf);
 	return 0;
 }
diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
index 30740a5cd30d..de8dbd5e04e8 100644
--- a/drivers/platform/x86/amd/pmf/pmf.h
+++ b/drivers/platform/x86/amd/pmf/pmf.h
@@ -100,6 +100,7 @@ struct amd_pmf_dev {
 	enum platform_profile_option current_profile;
 	struct platform_profile_handler pprof;
 	struct mutex lock; /* protects the PMF interface */
+	struct dentry *dbgfs_dir;
 };
 
 struct apmf_sps_prop_granular {
-- 
2.25.1