Commit d5db4f88 authored by Ray Wu's avatar Ray Wu Committed by Alex Deucher
Browse files

drm/amd/display: Add IPS residency info to debugfs 



[Why]
For debugging and testing purpose

[How]
Usage:
- echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_ips_residency_cntl
- echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_ips_residency_cntl
- cat /sys/kernel/debug/dri/0/amdgpu_dm_ips_residency

Reviewed-by: default avatarChiaHsuan (Tom) Chung <chiahsuan.chung@amd.com>
Signed-off-by: default avatarRay Wu <ray.wu@amd.com>
Signed-off-by: default avatarMatthew Stewart <matthew.stewart2@amd.com>
Tested-by: default avatarDan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent a625dc49

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

+70 −1
Original line number Diff line number Diff line
@@ -2709,6 +2709,65 @@ static int ips_status_show(struct seq_file *m, void *unused) 
	return 0;

}



/*

 * IPS residency information from DMUB service. Read only.

 *

 * For time-window (segment) measurement:

 *	1) echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_ips_residency_cntl

 *	2) sleep <seconds>

 *	3) echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_ips_residency_cntl

 *	4) cat /sys/kernel/debug/dri/0/amdgpu_dm_ips_residency

 */

static int ips_residency_show(struct seq_file *m, void *unused)

{

	struct amdgpu_device *adev = m->private;

	struct dc *dc = adev->dm.dc;

	uint8_t panel_inst = 0;

	enum ips_residency_mode mode;

	struct dmub_ips_residency_info info;



	mutex_lock(&adev->dm.dc_lock);



	mode = IPS_RESIDENCY__IPS1_RCG;

	if (!dc_dmub_srv_ips_query_residency_info(dc->ctx, panel_inst, &info, mode)) {

		seq_printf(m, "ISP query failed\n");

	} else {

		unsigned int pct, frac;

		pct = info.residency_millipercent / 1000;

		frac = info.residency_millipercent % 1000;



		seq_printf(m, "IPS residency: %u.%03u%% \n", pct, frac);

		seq_printf(m, "    entry_counter: %u\n", info.entry_counter);

		seq_printf(m, "    total_time_us: %llu\n",

			(unsigned long long)info.total_time_us);

		seq_printf(m, "    total_inactive_time_us: %llu\n",

			(unsigned long long)info.total_inactive_time_us);

	}

	mutex_unlock(&adev->dm.dc_lock);

	return 0;

}



static int ips_residency_cntl_get(void *data, u64 *val)

{

	*val = 0;

	return 0;

}



static int ips_residency_cntl_set(void *data, u64 val)

{

	struct amdgpu_device *adev = data;

	struct dc *dc = adev->dm.dc;

	uint8_t panel_inst = 0;

	int ret = 0;



	mutex_lock(&adev->dm.dc_lock);

	if (!dc_dmub_srv_ips_residency_cntl(dc->ctx, panel_inst, !!val))

		ret = -EIO;

	mutex_unlock(&adev->dm.dc_lock);



	return ret;

}



/*

 * Backlight at this moment.  Read only.

 * As written to display, taking ABM and backlight lut into account.
@@ -3370,9 +3429,12 @@ DEFINE_DEBUGFS_ATTRIBUTE(disallow_edp_enter_psr_fops, 
			disallow_edp_enter_psr_get,

			disallow_edp_enter_psr_set, "%llu\n");



DEFINE_DEBUGFS_ATTRIBUTE(ips_residency_cntl_fops, ips_residency_cntl_get,

			   ips_residency_cntl_set, "%llu\n");

DEFINE_SHOW_ATTRIBUTE(current_backlight);

DEFINE_SHOW_ATTRIBUTE(target_backlight);

DEFINE_SHOW_ATTRIBUTE(ips_status);

DEFINE_SHOW_ATTRIBUTE(ips_residency);



static const struct {

	char *name;
@@ -4271,7 +4333,14 @@ void dtn_debugfs_init(struct amdgpu_device *adev) 
	debugfs_create_file_unsafe("amdgpu_dm_disable_hpd", 0644, root, adev,

				   &disable_hpd_ops);



	if (adev->dm.dc->caps.ips_support)

	if (adev->dm.dc->caps.ips_support) {

		debugfs_create_file_unsafe("amdgpu_dm_ips_status", 0644, root, adev,

					   &ips_status_fops);



		debugfs_create_file_unsafe("amdgpu_dm_ips_residency_cntl", 0644, root, adev,

					   &ips_residency_cntl_fops);



		debugfs_create_file_unsafe("amdgpu_dm_ips_residency", 0644, root, adev,

					   &ips_residency_fops);

	}

}