1 // SPDX-License-Identifier: MIT
31  * Xe's Freq provides a sysfs API for frequency management:
33  * device/tile#/gt#/freq0/<item>_freq *read-only* files:
34  * - act_freq: The actual resolved frequency decided by PCODE.
35  * - cur_freq: The current one requested by GuC PC to the PCODE.
36  * - rpn_freq: The Render Performance (RP) N level, which is the minimal one.
37  * - rpe_freq: The Render Performance (RP) E level, which is the efficient one.
38  * - rp0_freq: The Render Performance (RP) 0 level, which is the maximum one.
40  * device/tile#/gt#/freq0/<item>_freq *read-write* files:
41  * - min_freq: Min frequency request.
42  * - max_freq: Max frequency request.
43  *             If max <= min, then freq_min becomes a fixed frequency request.
49 	return &kobj_to_gt(dev->kobj.parent)->uc.guc.pc;  in dev_to_pc()
65 	u32 freq;  in cur_freq_show()  local
68 	ret = xe_guc_pc_get_cur_freq(pc, &freq);  in cur_freq_show()
72 	return sysfs_emit(buf, "%d\n", freq);  in cur_freq_show()
107 	u32 freq;  in min_freq_show()  local
110 	ret = xe_guc_pc_get_min_freq(pc, &freq);  in min_freq_show()
114 	return sysfs_emit(buf, "%d\n", freq);  in min_freq_show()
121 	u32 freq;  in min_freq_store()  local
124 	ret = kstrtou32(buff, 0, &freq);  in min_freq_store()
128 	ret = xe_guc_pc_set_min_freq(pc, freq);  in min_freq_store()
140 	u32 freq;  in max_freq_show()  local
143 	ret = xe_guc_pc_get_max_freq(pc, &freq);  in max_freq_show()
147 	return sysfs_emit(buf, "%d\n", freq);  in max_freq_show()
154 	u32 freq;  in max_freq_store()  local
157 	ret = kstrtou32(buff, 0, &freq);  in max_freq_store()
161 	ret = xe_guc_pc_set_max_freq(pc, freq);  in max_freq_store()
189  * xe_gt_freq_init - Initialize Xe Freq component
199 	if (xe->info.skip_guc_pc)  in xe_gt_freq_init()
202 	gt->freq = kobject_create_and_add("freq0", gt->sysfs);  in xe_gt_freq_init()
203 	if (!gt->freq) {  in xe_gt_freq_init()
204 		drm_warn(&xe->drm, "failed to add freq0 directory to %s\n",  in xe_gt_freq_init()
205 			 kobject_name(gt->sysfs));  in xe_gt_freq_init()
209 	err = drmm_add_action_or_reset(&xe->drm, freq_fini, gt->freq);  in xe_gt_freq_init()
211 		drm_warn(&xe->drm, "%s: drmm_add_action_or_reset failed, err: %d\n",  in xe_gt_freq_init()
216 	err = sysfs_create_files(gt->freq, freq_attrs);  in xe_gt_freq_init()
218 		drm_warn(&xe->drm,  "failed to add freq attrs to %s, err: %d\n",  in xe_gt_freq_init()
219 			 kobject_name(gt->freq), err);  in xe_gt_freq_init()