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platform/x86/amd/pmf: Add debugfs information

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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.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20220802151149.2123699-5-Shyam-sundar.S-k@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Shyam Sundar S K
2022-08-02 20:41:42 +05:30
committed by Hans de Goede
parent 4c71ae4144
commit 4dc491c898
2 changed files with 37 additions and 0 deletions
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36
drivers/platform/x86/amd/pmf/core.c
View File

@@ -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;
}

1
drivers/platform/x86/amd/pmf/pmf.h
View File

@@ -90,6 +90,7 @@ struct amd_pmf_dev {
u32 supported_func;
enum platform_profile_option current_profile;
struct platform_profile_handler pprof;
struct dentry *dbgfs_dir;
};
struct apmf_sps_prop_granular {