[PATCH 3/3] drm/i915/gt: Expose default value for media_freq_factor in per-gt sysfs

[Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>]

Add the following sysfs file to gt/gtN/.defaults:
* media_freq_factor

Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
Cc: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
 drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c | 18 ++++++++++++++++++
 drivers/gpu/drm/i915/gt/intel_gt_types.h    |  1 +
 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c |  2 ++
 3 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c b/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
index 5eea9f78a6b2..c7e33084dd7c 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
@@ -760,6 +760,18 @@ default_boost_freq_mhz_show(struct kobject *kobj, struct kobj_attribute *attr, c
 static struct kobj_attribute default_boost_freq_mhz =
 __ATTR(rps_boost_freq_mhz, 0444, default_boost_freq_mhz_show, NULL);
 
+static ssize_t
+default_media_freq_factor_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+	struct intel_gt *gt = kobj_to_gt(kobj->parent);
+
+	return sysfs_emit(buf, "%u\n",
+			  media_ratio_mode_to_factor(gt->defaults.media_ratio_mode));
+}
+
+static struct kobj_attribute default_media_freq_factor =
+__ATTR(media_freq_factor, 0444, default_media_freq_factor_show, NULL);
+
 static const struct attribute * const rps_defaults_attrs[] = {
 	&default_min_freq_mhz.attr,
 	&default_max_freq_mhz.attr,
@@ -815,6 +827,12 @@ void intel_gt_sysfs_pm_init(struct intel_gt *gt, struct kobject *kobj)
 			drm_warn(&gt->i915->drm,
 				 "failed to create gt%u media_perf_power_attrs sysfs (%pe)\n",
 				 gt->info.id, ERR_PTR(ret));
+
+		ret = sysfs_create_file(gt->sysfs_defaults, &default_media_freq_factor.attr);
+		if (ret)
+			drm_warn(&gt->i915->drm,
+				 "failed to add gt%u default_media_freq_factor sysfs (%pe)\n",
+				 gt->info.id, ERR_PTR(ret));
 	}
 
 	ret = sysfs_create_files(gt->sysfs_defaults, rps_defaults_attrs);
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
index 4fb21daeaf09..4bca9ab492c3 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
@@ -72,6 +72,7 @@ struct gt_defaults {
 	u32 min_freq;
 	u32 max_freq;
 	u32 boost_freq;
+	u32 media_ratio_mode;
 };
 
 struct intel_gt {
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
index 0a02bd132da5..8220a2491a45 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
@@ -260,7 +260,9 @@ int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
 	slpc->boost_freq = 0;
 	atomic_set(&slpc->num_waiters, 0);
 	slpc->num_boosts = 0;
+
 	slpc->media_ratio_mode = SLPC_MEDIA_RATIO_MODE_DYNAMIC_CONTROL;
+	slpc_to_gt(slpc)->defaults.media_ratio_mode = slpc->media_ratio_mode;
 
 	mutex_init(&slpc->lock);
 	INIT_WORK(&slpc->boost_work, slpc_boost_work);
-- 
2.34.1