Commit 4dc491c8 authored by Shyam Sundar S K's avatar Shyam Sundar S K Committed by Hans de Goede
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platform/x86/amd/pmf: Add debugfs information 



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: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarShyam 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: default avatarHans de Goede <hdegoede@redhat.com>
parent 4c71ae41

drivers/platform/x86/amd/pmf/core.c

+36 −0
Original line number Diff line number Diff line
@@ -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;

}

drivers/platform/x86/amd/pmf/pmf.h

+1 −0
Original line number Diff line number Diff line
@@ -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 {