1/*
  2 * Copyright (C) 2009 Red Hat <mjg@redhat.com>
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining
  5 * a copy of this software and associated documentation files (the
  6 * "Software"), to deal in the Software without restriction, including
  7 * without limitation the rights to use, copy, modify, merge, publish,
  8 * distribute, sublicense, and/or sell copies of the Software, and to
  9 * permit persons to whom the Software is furnished to do so, subject to
 10 * the following conditions:
 11 *
 12 * The above copyright notice and this permission notice (including the
 13 * next paragraph) shall be included in all copies or substantial
 14 * portions of the Software.
 15 *
 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 19 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 23 *
 24 */
 25
 26/*
 27 * Authors:
 28 *  Matthew Garrett <mjg@redhat.com>
 29 *
 30 * Register locations derived from NVClock by Roderick Colenbrander
 31 */
 32
 33#include <linux/apple-gmux.h>
 34#include <linux/backlight.h>
 35#include <linux/idr.h>
 36#include <drm/drm_probe_helper.h>
 37
 38#include "nouveau_drv.h"
 39#include "nouveau_reg.h"
 40#include "nouveau_encoder.h"
 41#include "nouveau_connector.h"
 42#include "nouveau_acpi.h"
 43
 44static struct ida bl_ida;
 45#define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0'
 46
 
 
 
 
 
 47static bool
 48nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE],
 49			   struct nouveau_backlight *bl)
 50{
 51	const int nb = ida_alloc_max(&bl_ida, 99, GFP_KERNEL);
 52
 53	if (nb < 0)
 54		return false;
 55	if (nb > 0)
 56		snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
 57	else
 58		snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");
 59	bl->id = nb;
 60	return true;
 61}
 62
 63static int
 64nv40_get_intensity(struct backlight_device *bd)
 65{
 66	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
 67	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
 68	struct nvif_object *device = &drm->client.device.object;
 69	int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
 70		   NV40_PMC_BACKLIGHT_MASK) >> 16;
 71
 72	return val;
 73}
 74
 75static int
 76nv40_set_intensity(struct backlight_device *bd)
 77{
 78	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
 79	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
 80	struct nvif_object *device = &drm->client.device.object;
 81	int val = bd->props.brightness;
 82	int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
 83
 84	nvif_wr32(device, NV40_PMC_BACKLIGHT,
 85		  (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
 86
 87	return 0;
 88}
 89
 90static const struct backlight_ops nv40_bl_ops = {
 91	.options = BL_CORE_SUSPENDRESUME,
 92	.get_brightness = nv40_get_intensity,
 93	.update_status = nv40_set_intensity,
 94};
 95
 96static int
 97nv40_backlight_init(struct nouveau_encoder *encoder,
 98		    struct backlight_properties *props,
 99		    const struct backlight_ops **ops)
100{
101	struct nouveau_drm *drm = nouveau_drm(encoder->base.base.dev);
102	struct nvif_object *device = &drm->client.device.object;
 
 
 
 
103
104	if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
105		return -ENODEV;
106
107	props->max_brightness = 31;
108	*ops = &nv40_bl_ops;
109	return 0;
110}
 
 
 
 
 
111
112/*
113 * eDP brightness callbacks need to happen under lock, since we need to
114 * enable/disable the backlight ourselves for modesets
115 */
116static int
117nv50_edp_get_brightness(struct backlight_device *bd)
118{
119	struct drm_connector *connector = dev_get_drvdata(bd->dev.parent);
120	struct drm_device *dev = connector->dev;
121	struct drm_crtc *crtc;
122	struct drm_modeset_acquire_ctx ctx;
123	int ret = 0;
124
125	drm_modeset_acquire_init(&ctx, 0);
126
127retry:
128	ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
129	if (ret == -EDEADLK)
130		goto deadlock;
131	else if (ret < 0)
132		goto out;
133
134	crtc = connector->state->crtc;
135	if (!crtc)
136		goto out;
137
138	ret = drm_modeset_lock(&crtc->mutex, &ctx);
139	if (ret == -EDEADLK)
140		goto deadlock;
141	else if (ret < 0)
142		goto out;
143
144	if (!crtc->state->active)
145		goto out;
146
147	ret = bd->props.brightness;
148out:
149	drm_modeset_drop_locks(&ctx);
150	drm_modeset_acquire_fini(&ctx);
151	return ret;
152deadlock:
153	drm_modeset_backoff(&ctx);
154	goto retry;
155}
156
157static int
158nv50_edp_set_brightness(struct backlight_device *bd)
159{
160	struct drm_connector *connector = dev_get_drvdata(bd->dev.parent);
161	struct nouveau_connector *nv_connector = nouveau_connector(connector);
162	struct drm_device *dev = connector->dev;
163	struct drm_crtc *crtc;
164	struct drm_dp_aux *aux = &nv_connector->aux;
165	struct nouveau_backlight *nv_bl = nv_connector->backlight;
166	struct drm_modeset_acquire_ctx ctx;
167	int ret = 0;
168
169	drm_modeset_acquire_init(&ctx, 0);
170retry:
171	ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
172	if (ret == -EDEADLK)
173		goto deadlock;
174	else if (ret < 0)
175		goto out;
176
177	crtc = connector->state->crtc;
178	if (!crtc)
179		goto out;
180
181	ret = drm_modeset_lock(&crtc->mutex, &ctx);
182	if (ret == -EDEADLK)
183		goto deadlock;
184	else if (ret < 0)
185		goto out;
186
187	if (crtc->state->active)
188		ret = drm_edp_backlight_set_level(aux, &nv_bl->edp_info, bd->props.brightness);
189
190out:
191	drm_modeset_drop_locks(&ctx);
192	drm_modeset_acquire_fini(&ctx);
193	return ret;
194deadlock:
195	drm_modeset_backoff(&ctx);
196	goto retry;
197}
198
199static const struct backlight_ops nv50_edp_bl_ops = {
200	.get_brightness = nv50_edp_get_brightness,
201	.update_status = nv50_edp_set_brightness,
202};
203
204static int
205nv50_get_intensity(struct backlight_device *bd)
206{
207	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
208
209	return nvif_outp_bl_get(&nv_encoder->outp);
 
 
 
 
 
 
 
210}
211
212static int
213nv50_set_intensity(struct backlight_device *bd)
214{
215	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
 
 
 
 
 
216
217	return nvif_outp_bl_set(&nv_encoder->outp, backlight_get_brightness(bd));
 
 
218}
219
220static const struct backlight_ops nv50_bl_ops = {
221	.options = BL_CORE_SUSPENDRESUME,
222	.get_brightness = nv50_get_intensity,
223	.update_status = nv50_set_intensity,
224};
225
226/* FIXME: perform backlight probing for eDP _before_ this, this only gets called after connector
227 * registration which happens after the initial modeset
228 */
229static int
230nv50_backlight_init(struct nouveau_backlight *bl,
231		    struct nouveau_connector *nv_conn,
232		    struct nouveau_encoder *nv_encoder,
233		    struct backlight_properties *props,
234		    const struct backlight_ops **ops)
235{
 
236	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
 
 
 
237
238	/*
239	 * Note when this runs the connectors have not been probed yet,
240	 * so nv_conn->base.status is not set yet.
241	 */
242	if (nvif_outp_bl_get(&nv_encoder->outp) < 0 ||
243	    drm_helper_probe_detect(&nv_conn->base, NULL, false) != connector_status_connected)
244		return -ENODEV;
245
246	if (nv_conn->type == DCB_CONNECTOR_eDP) {
247		int ret;
248		u16 current_level;
249		u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE];
250		u8 current_mode;
251
252		ret = drm_dp_dpcd_read(&nv_conn->aux, DP_EDP_DPCD_REV, edp_dpcd,
253				       EDP_DISPLAY_CTL_CAP_SIZE);
254		if (ret < 0)
255			return ret;
256
257		/* TODO: Add support for hybrid PWM/DPCD panels */
258		if (drm_edp_backlight_supported(edp_dpcd) &&
259		    (edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP) &&
260		    (edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP)) {
261			NV_DEBUG(drm, "DPCD backlight controls supported on %s\n",
262				 nv_conn->base.name);
263
264			ret = drm_edp_backlight_init(&nv_conn->aux, &bl->edp_info, 0, edp_dpcd,
265						     &current_level, &current_mode);
266			if (ret < 0)
267				return ret;
268
269			ret = drm_edp_backlight_enable(&nv_conn->aux, &bl->edp_info, current_level);
270			if (ret < 0) {
271				NV_ERROR(drm, "Failed to enable backlight on %s: %d\n",
272					 nv_conn->base.name, ret);
273				return ret;
274			}
275
276			*ops = &nv50_edp_bl_ops;
277			props->brightness = current_level;
278			props->max_brightness = bl->edp_info.max;
279			bl->uses_dpcd = true;
280			return 0;
281		}
282	}
283
284	*ops = &nv50_bl_ops;
285	props->max_brightness = 100;
286	return 0;
287}
288
289int
290nouveau_backlight_init(struct drm_connector *connector)
 
 
 
 
 
 
291{
292	struct nouveau_drm *drm = nouveau_drm(connector->dev);
293	struct nouveau_backlight *bl;
294	struct nouveau_encoder *nv_encoder = NULL;
295	struct nvif_device *device = &drm->client.device;
296	char backlight_name[BL_NAME_SIZE];
297	struct backlight_properties props = {0};
298	const struct backlight_ops *ops;
299	int ret;
 
300
301	if (apple_gmux_present()) {
302		NV_INFO_ONCE(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n");
303		return 0;
 
 
304	}
305
306	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
307		nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
308	else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
309		nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
310	else
311		return 0;
312
313	if (!nv_encoder)
314		return 0;
 
 
 
 
315
316	bl = kzalloc(sizeof(*bl), GFP_KERNEL);
317	if (!bl)
318		return -ENOMEM;
319
320	switch (device->info.family) {
321	case NV_DEVICE_INFO_V0_CURIE:
322		ret = nv40_backlight_init(nv_encoder, &props, &ops);
323		break;
324	case NV_DEVICE_INFO_V0_TESLA:
325	case NV_DEVICE_INFO_V0_FERMI:
326	case NV_DEVICE_INFO_V0_KEPLER:
327	case NV_DEVICE_INFO_V0_MAXWELL:
328	case NV_DEVICE_INFO_V0_PASCAL:
329	case NV_DEVICE_INFO_V0_VOLTA:
330	case NV_DEVICE_INFO_V0_TURING:
331	case NV_DEVICE_INFO_V0_AMPERE: //XXX: not confirmed
332		ret = nv50_backlight_init(bl, nouveau_connector(connector),
333					  nv_encoder, &props, &ops);
334		break;
335	default:
336		ret = 0;
337		goto fail_alloc;
338	}
 
 
339
340	if (ret) {
341		if (ret == -ENODEV)
342			ret = 0;
343		goto fail_alloc;
344	}
345
346	if (!nouveau_acpi_video_backlight_use_native()) {
347		NV_INFO(drm, "Skipping nv_backlight registration\n");
348		goto fail_alloc;
349	}
 
 
350
351	if (!nouveau_get_backlight_name(backlight_name, bl)) {
352		NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
353		goto fail_alloc;
 
 
 
 
 
 
 
 
 
354	}
355
356	props.type = BACKLIGHT_RAW;
357	bl->dev = backlight_device_register(backlight_name, connector->kdev,
358					    nv_encoder, ops, &props);
359	if (IS_ERR(bl->dev)) {
360		if (bl->id >= 0)
361			ida_free(&bl_ida, bl->id);
362		ret = PTR_ERR(bl->dev);
363		goto fail_alloc;
 
 
 
 
 
 
 
 
364	}
365
366	nouveau_connector(connector)->backlight = bl;
367	if (!bl->dev->props.brightness)
368		bl->dev->props.brightness =
369			bl->dev->ops->get_brightness(bl->dev);
370	backlight_update_status(bl->dev);
371
372	return 0;
373
374fail_alloc:
375	kfree(bl);
376	/*
377	 * If we get here we have an internal panel, but no nv_backlight,
378	 * try registering an ACPI video backlight device instead.
379	 */
380	if (ret == 0)
381		nouveau_acpi_video_register_backlight();
382
383	return ret;
384}
385
386void
387nouveau_backlight_fini(struct drm_connector *connector)
388{
389	struct nouveau_connector *nv_conn = nouveau_connector(connector);
390	struct nouveau_backlight *bl = nv_conn->backlight;
391
392	if (!bl)
393		return;
394
395	if (bl->id >= 0)
396		ida_free(&bl_ida, bl->id);
 
 
397
398	backlight_device_unregister(bl->dev);
399	nv_conn->backlight = NULL;
400	kfree(bl);
 
401}
402
403void
404nouveau_backlight_ctor(void)
405{
406	ida_init(&bl_ida);
407}
408
409void
410nouveau_backlight_dtor(void)
411{
412	ida_destroy(&bl_ida);
413}

  1/*
  2 * Copyright (C) 2009 Red Hat <mjg@redhat.com>
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining
  5 * a copy of this software and associated documentation files (the
  6 * "Software"), to deal in the Software without restriction, including
  7 * without limitation the rights to use, copy, modify, merge, publish,
  8 * distribute, sublicense, and/or sell copies of the Software, and to
  9 * permit persons to whom the Software is furnished to do so, subject to
 10 * the following conditions:
 11 *
 12 * The above copyright notice and this permission notice (including the
 13 * next paragraph) shall be included in all copies or substantial
 14 * portions of the Software.
 15 *
 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 19 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 23 *
 24 */
 25
 26/*
 27 * Authors:
 28 *  Matthew Garrett <mjg@redhat.com>
 29 *
 30 * Register locations derived from NVClock by Roderick Colenbrander
 31 */
 32
 33#include <linux/apple-gmux.h>
 34#include <linux/backlight.h>
 35#include <linux/idr.h>
 
 36
 37#include "nouveau_drv.h"
 38#include "nouveau_reg.h"
 39#include "nouveau_encoder.h"
 
 
 40
 41static struct ida bl_ida;
 42#define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0'
 43
 44struct backlight_connector {
 45	struct list_head head;
 46	int id;
 47};
 48
 49static bool
 50nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE], struct backlight_connector
 51		*connector)
 52{
 53	const int nb = ida_simple_get(&bl_ida, 0, 0, GFP_KERNEL);
 54	if (nb < 0 || nb >= 100)
 
 55		return false;
 56	if (nb > 0)
 57		snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
 58	else
 59		snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");
 60	connector->id = nb;
 61	return true;
 62}
 63
 64static int
 65nv40_get_intensity(struct backlight_device *bd)
 66{
 67	struct nouveau_drm *drm = bl_get_data(bd);
 
 68	struct nvif_object *device = &drm->client.device.object;
 69	int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
 70				   NV40_PMC_BACKLIGHT_MASK) >> 16;
 71
 72	return val;
 73}
 74
 75static int
 76nv40_set_intensity(struct backlight_device *bd)
 77{
 78	struct nouveau_drm *drm = bl_get_data(bd);
 
 79	struct nvif_object *device = &drm->client.device.object;
 80	int val = bd->props.brightness;
 81	int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
 82
 83	nvif_wr32(device, NV40_PMC_BACKLIGHT,
 84		 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
 85
 86	return 0;
 87}
 88
 89static const struct backlight_ops nv40_bl_ops = {
 90	.options = BL_CORE_SUSPENDRESUME,
 91	.get_brightness = nv40_get_intensity,
 92	.update_status = nv40_set_intensity,
 93};
 94
 95static int
 96nv40_backlight_init(struct drm_connector *connector)
 
 
 97{
 98	struct nouveau_drm *drm = nouveau_drm(connector->dev);
 99	struct nvif_object *device = &drm->client.device.object;
100	struct backlight_properties props;
101	struct backlight_device *bd;
102	struct backlight_connector bl_connector;
103	char backlight_name[BL_NAME_SIZE];
104
105	if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
106		return 0;
107
108	memset(&props, 0, sizeof(struct backlight_properties));
109	props.type = BACKLIGHT_RAW;
110	props.max_brightness = 31;
111	if (!nouveau_get_backlight_name(backlight_name, &bl_connector)) {
112		NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
113		return 0;
114	}
115	bd = backlight_device_register(backlight_name , connector->kdev, drm,
116				       &nv40_bl_ops, &props);
117
118	if (IS_ERR(bd)) {
119		if (bl_connector.id > 0)
120			ida_simple_remove(&bl_ida, bl_connector.id);
121		return PTR_ERR(bd);
122	}
123	list_add(&bl_connector.head, &drm->bl_connectors);
124	drm->backlight = bd;
125	bd->props.brightness = nv40_get_intensity(bd);
126	backlight_update_status(bd);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
127
128	return 0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
129}
130
 
 
 
 
 
131static int
132nv50_get_intensity(struct backlight_device *bd)
133{
134	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
135	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
136	struct nvif_object *device = &drm->client.device.object;
137	int or = ffs(nv_encoder->dcb->or) - 1;
138	u32 div = 1025;
139	u32 val;
140
141	val  = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
142	val &= NV50_PDISP_SOR_PWM_CTL_VAL;
143	return ((val * 100) + (div / 2)) / div;
144}
145
146static int
147nv50_set_intensity(struct backlight_device *bd)
148{
149	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
150	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
151	struct nvif_object *device = &drm->client.device.object;
152	int or = ffs(nv_encoder->dcb->or) - 1;
153	u32 div = 1025;
154	u32 val = (bd->props.brightness * div) / 100;
155
156	nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
157			NV50_PDISP_SOR_PWM_CTL_NEW | val);
158	return 0;
159}
160
161static const struct backlight_ops nv50_bl_ops = {
162	.options = BL_CORE_SUSPENDRESUME,
163	.get_brightness = nv50_get_intensity,
164	.update_status = nv50_set_intensity,
165};
166
 
 
 
167static int
168nva3_get_intensity(struct backlight_device *bd)
 
 
 
 
169{
170	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
171	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
172	struct nvif_object *device = &drm->client.device.object;
173	int or = ffs(nv_encoder->dcb->or) - 1;
174	u32 div, val;
175
176	div  = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
177	val  = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
178	val &= NVA3_PDISP_SOR_PWM_CTL_VAL;
179	if (div && div >= val)
180		return ((val * 100) + (div / 2)) / div;
181
182	return 100;
183}
184
185static int
186nva3_set_intensity(struct backlight_device *bd)
187{
188	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
189	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
190	struct nvif_object *device = &drm->client.device.object;
191	int or = ffs(nv_encoder->dcb->or) - 1;
192	u32 div, val;
193
194	div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
195	val = (bd->props.brightness * div) / 100;
196	if (div) {
197		nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val |
198				NV50_PDISP_SOR_PWM_CTL_NEW |
199				NVA3_PDISP_SOR_PWM_CTL_UNK);
200		return 0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
201	}
202
203	return -EINVAL;
 
 
204}
205
206static const struct backlight_ops nva3_bl_ops = {
207	.options = BL_CORE_SUSPENDRESUME,
208	.get_brightness = nva3_get_intensity,
209	.update_status = nva3_set_intensity,
210};
211
212static int
213nv50_backlight_init(struct drm_connector *connector)
214{
215	struct nouveau_drm *drm = nouveau_drm(connector->dev);
216	struct nvif_object *device = &drm->client.device.object;
217	struct nouveau_encoder *nv_encoder;
218	struct backlight_properties props;
219	struct backlight_device *bd;
 
220	const struct backlight_ops *ops;
221	struct backlight_connector bl_connector;
222	char backlight_name[BL_NAME_SIZE];
223
224	nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
225	if (!nv_encoder) {
226		nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
227		if (!nv_encoder)
228			return -ENODEV;
229	}
230
231	if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(ffs(nv_encoder->dcb->or) - 1)))
 
 
 
 
232		return 0;
233
234	if (drm->client.device.info.chipset <= 0xa0 ||
235	    drm->client.device.info.chipset == 0xaa ||
236	    drm->client.device.info.chipset == 0xac)
237		ops = &nv50_bl_ops;
238	else
239		ops = &nva3_bl_ops;
240
241	memset(&props, 0, sizeof(struct backlight_properties));
242	props.type = BACKLIGHT_RAW;
243	props.max_brightness = 100;
244	if (!nouveau_get_backlight_name(backlight_name, &bl_connector)) {
245		NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
246		return 0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
247	}
248	bd = backlight_device_register(backlight_name , connector->kdev,
249				       nv_encoder, ops, &props);
250
251	if (IS_ERR(bd)) {
252		if (bl_connector.id > 0)
253			ida_simple_remove(&bl_ida, bl_connector.id);
254		return PTR_ERR(bd);
255	}
256
257	list_add(&bl_connector.head, &drm->bl_connectors);
258	drm->backlight = bd;
259	bd->props.brightness = bd->ops->get_brightness(bd);
260	backlight_update_status(bd);
261	return 0;
262}
263
264int
265nouveau_backlight_init(struct drm_device *dev)
266{
267	struct nouveau_drm *drm = nouveau_drm(dev);
268	struct nvif_device *device = &drm->client.device;
269	struct drm_connector *connector;
270
271	INIT_LIST_HEAD(&drm->bl_connectors);
272
273	if (apple_gmux_present()) {
274		NV_INFO(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n");
275		return 0;
276	}
277
278	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
279		if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS &&
280		    connector->connector_type != DRM_MODE_CONNECTOR_eDP)
281			continue;
282
283		switch (device->info.family) {
284		case NV_DEVICE_INFO_V0_CURIE:
285			return nv40_backlight_init(connector);
286		case NV_DEVICE_INFO_V0_TESLA:
287		case NV_DEVICE_INFO_V0_FERMI:
288		case NV_DEVICE_INFO_V0_KEPLER:
289		case NV_DEVICE_INFO_V0_MAXWELL:
290			return nv50_backlight_init(connector);
291		default:
292			break;
293		}
294	}
295
 
 
 
 
 
296
297	return 0;
 
 
 
 
 
 
 
 
 
 
 
298}
299
300void
301nouveau_backlight_exit(struct drm_device *dev)
302{
303	struct nouveau_drm *drm = nouveau_drm(dev);
304	struct backlight_connector *connector;
 
 
 
305
306	list_for_each_entry(connector, &drm->bl_connectors, head) {
307		if (connector->id >= 0)
308			ida_simple_remove(&bl_ida, connector->id);
309	}
310
311	if (drm->backlight) {
312		backlight_device_unregister(drm->backlight);
313		drm->backlight = NULL;
314	}
315}
316
317void
318nouveau_backlight_ctor(void)
319{
320	ida_init(&bl_ida);
321}
322
323void
324nouveau_backlight_dtor(void)
325{
326	ida_destroy(&bl_ida);
327}