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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c 
 kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
....@@ -27,10 +27,11 @@
2727 #include <linux/power_supply.h>
2828 #include <linux/pm_runtime.h>
2929 #include <acpi/video.h>
30
-#include <drm/drmP.h>
30
+
3131 #include <drm/drm_crtc_helper.h>
3232 #include "amdgpu.h"
3333 #include "amdgpu_pm.h"
34
+#include "amdgpu_display.h"
3435 #include "amd_acpi.h"
3536 #include "atom.h"
3637 
....@@ -40,28 +41,21 @@
4041 };
4142 
4243 struct amdgpu_atif_notifications {
43
-	bool display_switch;
44
-	bool expansion_mode_change;
4544 	bool thermal_state;
4645 	bool forced_power_state;
4746 	bool system_power_state;
48
-	bool display_conf_change;
49
-	bool px_gfx_switch;
5047 	bool brightness_change;
5148 	bool dgpu_display_event;
49
+	bool gpu_package_power_limit;
5250 };
5351 
5452 struct amdgpu_atif_functions {
5553 	bool system_params;
5654 	bool sbios_requests;
57
-	bool select_active_disp;
58
-	bool lid_state;
59
-	bool get_tv_standard;
60
-	bool set_tv_standard;
61
-	bool get_panel_expansion_mode;
62
-	bool set_panel_expansion_mode;
6355 	bool temperature_change;
64
-	bool graphics_device_types;
56
+	bool query_backlight_transfer_characteristics;
57
+	bool ready_to_undock;
58
+	bool external_gpu_information;
6559 };
6660 
6761 struct amdgpu_atif {
....@@ -70,7 +64,10 @@
7064 	struct amdgpu_atif_notifications notifications;
7165 	struct amdgpu_atif_functions functions;
7266 	struct amdgpu_atif_notification_cfg notification_cfg;
73
-	struct amdgpu_encoder *encoder_for_bl;
67
+#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
68
+	struct backlight_device *bd;
69
+#endif
70
+	struct amdgpu_dm_backlight_caps backlight_caps;
7471 };
7572 
7673 /* Call the ATIF method
....@@ -136,15 +133,12 @@
136133  */
137134 static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
138135 {
139
-	n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
140
-	n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
141136 	n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
142137 	n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
143138 	n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
144
-	n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
145
-	n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
146139 	n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
147140 	n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
141
+	n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
148142 }
149143 
150144 /**
....@@ -161,14 +155,11 @@
161155 {
162156 	f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
163157 	f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
164
-	f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
165
-	f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
166
-	f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
167
-	f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
168
-	f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
169
-	f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
170158 	f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
171
-	f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
159
+	f->query_backlight_transfer_characteristics =
160
+		mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
161
+	f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
162
+	f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
172163 }
173164 
174165 /**
....@@ -310,6 +301,65 @@
310301 }
311302 
312303 /**
304
+ * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
305
+ *
306
+ * @handle: acpi handle
307
+ *
308
+ * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
309
+ * to determine the acceptable range of backlight values
310
+ *
311
+ * Backlight_caps.caps_valid will be set to true if the query is successful
312
+ *
313
+ * The input signals are in range 0-255
314
+ *
315
+ * This function assumes the display with backlight is the first LCD
316
+ *
317
+ * Returns 0 on success, error on failure.
318
+ */
319
+static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
320
+{
321
+	union acpi_object *info;
322
+	struct atif_qbtc_output characteristics;
323
+	struct atif_qbtc_arguments arguments;
324
+	struct acpi_buffer params;
325
+	size_t size;
326
+	int err = 0;
327
+
328
+	arguments.size = sizeof(arguments);
329
+	arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
330
+
331
+	params.length = sizeof(arguments);
332
+	params.pointer = (void *)&arguments;
333
+
334
+	info = amdgpu_atif_call(atif,
335
+		ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
336
+		&params);
337
+	if (!info) {
338
+		err = -EIO;
339
+		goto out;
340
+	}
341
+
342
+	size = *(u16 *) info->buffer.pointer;
343
+	if (size < 10) {
344
+		err = -EINVAL;
345
+		goto out;
346
+	}
347
+
348
+	memset(&characteristics, 0, sizeof(characteristics));
349
+	size = min(sizeof(characteristics), size);
350
+	memcpy(&characteristics, info->buffer.pointer, size);
351
+
352
+	atif->backlight_caps.caps_valid = true;
353
+	atif->backlight_caps.min_input_signal =
354
+			characteristics.min_input_signal;
355
+	atif->backlight_caps.max_input_signal =
356
+			characteristics.max_input_signal;
357
+out:
358
+	kfree(info);
359
+	return err;
360
+}
361
+
362
+/**
313363  * amdgpu_atif_get_sbios_requests - get requested sbios event
314364  *
315365  * @handle: acpi handle
....@@ -396,32 +446,28 @@
396446 
397447 		DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
398448 
399
-		/* todo: add DC handling */
400
-		if ((req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) &&
401
-		    !amdgpu_device_has_dc_support(adev)) {
402
-			struct amdgpu_encoder *enc = atif->encoder_for_bl;
403
-
404
-			if (enc) {
405
-				struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
406
-
449
+		if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
450
+#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
451
+			if (atif->bd) {
407452 				DRM_DEBUG_DRIVER("Changing brightness to %d\n",
408453 						 req.backlight_level);
409
-
410
-				amdgpu_display_backlight_set_level(adev, enc, req.backlight_level);
411
-
412
-#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
413
-				backlight_force_update(dig->bl_dev,
414
-						       BACKLIGHT_UPDATE_HOTKEY);
415
-#endif
454
+				/*
455
+				 * XXX backlight_device_set_brightness() is
456
+				 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
457
+				 * It probably should accept 'reason' parameter.
458
+				 */
459
+				backlight_device_set_brightness(atif->bd, req.backlight_level);
416460 			}
461
+#endif
417462 		}
463
+
418464 		if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
419465 			if (adev->flags & AMD_IS_PX) {
420
-				pm_runtime_get_sync(adev->ddev->dev);
466
+				pm_runtime_get_sync(adev_to_drm(adev)->dev);
421467 				/* Just fire off a uevent and let userspace tell us what to do */
422
-				drm_helper_hpd_irq_event(adev->ddev);
423
-				pm_runtime_mark_last_busy(adev->ddev->dev);
424
-				pm_runtime_put_autosuspend(adev->ddev->dev);
468
+				drm_helper_hpd_irq_event(adev_to_drm(adev));
469
+				pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
470
+				pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
425471 			}
426472 		}
427473 		/* TODO: check other events */
....@@ -760,24 +806,33 @@
760806 	}
761807 	adev->atif = atif;
762808 
809
+#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
763810 	if (atif->notifications.brightness_change) {
764
-		struct drm_encoder *tmp;
811
+		if (amdgpu_device_has_dc_support(adev)) {
812
+#if defined(CONFIG_DRM_AMD_DC)
813
+			struct amdgpu_display_manager *dm = &adev->dm;
814
+			atif->bd = dm->backlight_dev;
815
+#endif
816
+		} else {
817
+			struct drm_encoder *tmp;
765818 
766
-		/* Find the encoder controlling the brightness */
767
-		list_for_each_entry(tmp, &adev->ddev->mode_config.encoder_list,
768
-				head) {
769
-			struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
819
+			/* Find the encoder controlling the brightness */
820
+			list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
821
+					    head) {
822
+				struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
770823 
771
-			if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
772
-			    enc->enc_priv) {
773
-				struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
774
-				if (dig->bl_dev) {
775
-					atif->encoder_for_bl = enc;
776
-					break;
824
+				if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
825
+				    enc->enc_priv) {
826
+					struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
827
+					if (dig->bl_dev) {
828
+						atif->bd = dig->bl_dev;
829
+						break;
830
+					}
777831 				}
778832 			}
779833 		}
780834 	}
835
+#endif
781836 
782837 	if (atif->functions.sbios_requests && !atif->functions.system_params) {
783838 		/* XXX check this workraround, if sbios request function is
....@@ -797,11 +852,34 @@
797852 		}
798853 	}
799854 
855
+	if (atif->functions.query_backlight_transfer_characteristics) {
856
+		ret = amdgpu_atif_query_backlight_caps(atif);
857
+		if (ret) {
858
+			DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
859
+					ret);
860
+			atif->backlight_caps.caps_valid = false;
861
+		}
862
+	} else {
863
+		atif->backlight_caps.caps_valid = false;
864
+	}
865
+
800866 out:
801867 	adev->acpi_nb.notifier_call = amdgpu_acpi_event;
802868 	register_acpi_notifier(&adev->acpi_nb);
803869 
804870 	return ret;
871
+}
872
+
873
+void amdgpu_acpi_get_backlight_caps(struct amdgpu_device *adev,
874
+		struct amdgpu_dm_backlight_caps *caps)
875
+{
876
+	if (!adev->atif) {
877
+		caps->caps_valid = false;
878
+		return;
879
+	}
880
+	caps->caps_valid = adev->atif->backlight_caps.caps_valid;
881
+	caps->min_input_signal = adev->atif->backlight_caps.min_input_signal;
882
+	caps->max_input_signal = adev->atif->backlight_caps.max_input_signal;
805883 }
806884 
807885 /**
....@@ -814,6 +892,5 @@
814892 void amdgpu_acpi_fini(struct amdgpu_device *adev)
815893 {
816894 	unregister_acpi_notifier(&adev->acpi_nb);
817
-	if (adev->atif)
818
-		kfree(adev->atif);
895
+	kfree(adev->atif);
819896 }