blob: ab696ca7eeecc8544df4a9db2a1c74d00797bc9f [file] [log] [blame]
Alan Coxd839ede2012-05-03 15:06:18 +01001/*
2 * Copyright 2011 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 */
Alan Coxd839ede2012-05-03 15:06:18 +010024#include <linux/acpi.h>
Alan Coxd839ede2012-05-03 15:06:18 +010025#include "psb_drv.h"
26#include "psb_intel_reg.h"
27
28#define PCI_ASLE 0xe4
29#define PCI_ASLS 0xfc
30
31#define OPREGION_HEADER_OFFSET 0
32#define OPREGION_ACPI_OFFSET 0x100
33#define ACPI_CLID 0x01ac /* current lid state indicator */
34#define ACPI_CDCK 0x01b0 /* current docking state indicator */
35#define OPREGION_SWSCI_OFFSET 0x200
36#define OPREGION_ASLE_OFFSET 0x300
37#define OPREGION_VBT_OFFSET 0x400
38
39#define OPREGION_SIGNATURE "IntelGraphicsMem"
40#define MBOX_ACPI (1<<0)
41#define MBOX_SWSCI (1<<1)
42#define MBOX_ASLE (1<<2)
43
44struct opregion_header {
45 u8 signature[16];
46 u32 size;
47 u32 opregion_ver;
48 u8 bios_ver[32];
49 u8 vbios_ver[16];
50 u8 driver_ver[16];
51 u32 mboxes;
52 u8 reserved[164];
53} __packed;
54
55/* OpRegion mailbox #1: public ACPI methods */
56struct opregion_acpi {
57 u32 drdy; /* driver readiness */
58 u32 csts; /* notification status */
59 u32 cevt; /* current event */
60 u8 rsvd1[20];
61 u32 didl[8]; /* supported display devices ID list */
62 u32 cpdl[8]; /* currently presented display list */
63 u32 cadl[8]; /* currently active display list */
64 u32 nadl[8]; /* next active devices list */
65 u32 aslp; /* ASL sleep time-out */
66 u32 tidx; /* toggle table index */
67 u32 chpd; /* current hotplug enable indicator */
68 u32 clid; /* current lid state*/
69 u32 cdck; /* current docking state */
70 u32 sxsw; /* Sx state resume */
71 u32 evts; /* ASL supported events */
72 u32 cnot; /* current OS notification */
73 u32 nrdy; /* driver status */
74 u8 rsvd2[60];
75} __packed;
76
77/* OpRegion mailbox #2: SWSCI */
78struct opregion_swsci {
79 /*FIXME: add it later*/
80} __packed;
81
82/* OpRegion mailbox #3: ASLE */
83struct opregion_asle {
84 u32 ardy; /* driver readiness */
85 u32 aslc; /* ASLE interrupt command */
86 u32 tche; /* technology enabled indicator */
87 u32 alsi; /* current ALS illuminance reading */
88 u32 bclp; /* backlight brightness to set */
89 u32 pfit; /* panel fitting state */
90 u32 cblv; /* current brightness level */
91 u16 bclm[20]; /* backlight level duty cycle mapping table */
92 u32 cpfm; /* current panel fitting mode */
93 u32 epfm; /* enabled panel fitting modes */
94 u8 plut[74]; /* panel LUT and identifier */
95 u32 pfmb; /* PWM freq and min brightness */
96 u8 rsvd[102];
97} __packed;
98
99/* ASLE irq request bits */
100#define ASLE_SET_ALS_ILLUM (1 << 0)
101#define ASLE_SET_BACKLIGHT (1 << 1)
102#define ASLE_SET_PFIT (1 << 2)
103#define ASLE_SET_PWM_FREQ (1 << 3)
104#define ASLE_REQ_MSK 0xf
105
106/* response bits of ASLE irq request */
107#define ASLE_ALS_ILLUM_FAILED (1<<10)
108#define ASLE_BACKLIGHT_FAILED (1<<12)
109#define ASLE_PFIT_FAILED (1<<14)
110#define ASLE_PWM_FREQ_FAILED (1<<16)
111
112/* ASLE backlight brightness to set */
113#define ASLE_BCLP_VALID (1<<31)
114#define ASLE_BCLP_MSK (~(1<<31))
115
116/* ASLE panel fitting request */
117#define ASLE_PFIT_VALID (1<<31)
118#define ASLE_PFIT_CENTER (1<<0)
119#define ASLE_PFIT_STRETCH_TEXT (1<<1)
120#define ASLE_PFIT_STRETCH_GFX (1<<2)
121
122/* response bits of ASLE irq request */
123#define ASLE_ALS_ILLUM_FAILED (1<<10)
124#define ASLE_BACKLIGHT_FAILED (1<<12)
125#define ASLE_PFIT_FAILED (1<<14)
126#define ASLE_PWM_FREQ_FAILED (1<<16)
127
128/* ASLE backlight brightness to set */
129#define ASLE_BCLP_VALID (1<<31)
130#define ASLE_BCLP_MSK (~(1<<31))
131
132/* ASLE panel fitting request */
133#define ASLE_PFIT_VALID (1<<31)
134#define ASLE_PFIT_CENTER (1<<0)
135#define ASLE_PFIT_STRETCH_TEXT (1<<1)
136#define ASLE_PFIT_STRETCH_GFX (1<<2)
137
138/* PWM frequency and minimum brightness */
139#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
140#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
141#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
142#define ASLE_PFMB_PWM_VALID (1<<31)
143
144#define ASLE_CBLV_VALID (1<<31)
145
Alan Cox166973e2012-07-16 17:52:45 +0100146static struct psb_intel_opregion *system_opregion;
147
Alan Coxd839ede2012-05-03 15:06:18 +0100148static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
149{
150 struct drm_psb_private *dev_priv = dev->dev_private;
151 struct opregion_asle *asle = dev_priv->opregion.asle;
152 struct backlight_device *bd = dev_priv->backlight_device;
Alan Coxd839ede2012-05-03 15:06:18 +0100153
154 DRM_DEBUG_DRIVER("asle set backlight %x\n", bclp);
155
156 if (!(bclp & ASLE_BCLP_VALID))
157 return ASLE_BACKLIGHT_FAILED;
158
159 if (bd == NULL)
160 return ASLE_BACKLIGHT_FAILED;
161
162 bclp &= ASLE_BCLP_MSK;
163 if (bclp > 255)
164 return ASLE_BACKLIGHT_FAILED;
165
Dan Carpenterfcf92202012-05-10 10:33:02 +0300166 if (config_enabled(CONFIG_BACKLIGHT_CLASS_DEVICE)) {
167 int max = bd->props.max_brightness;
Zhao Yakuid112a812012-08-08 13:55:55 +0000168 gma_backlight_set(dev, bclp * max / 255);
Dan Carpenterfcf92202012-05-10 10:33:02 +0300169 }
170
Alan Coxd839ede2012-05-03 15:06:18 +0100171 asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID;
172
173 return 0;
174}
175
Patrik Jakobsson778e26d2014-03-11 18:51:20 +0100176static void psb_intel_opregion_asle_work(struct work_struct *work)
Alan Coxd839ede2012-05-03 15:06:18 +0100177{
Patrik Jakobsson778e26d2014-03-11 18:51:20 +0100178 struct psb_intel_opregion *opregion =
179 container_of(work, struct psb_intel_opregion, asle_work);
180 struct drm_psb_private *dev_priv =
181 container_of(opregion, struct drm_psb_private, opregion);
182 struct opregion_asle *asle = opregion->asle;
Alan Coxd839ede2012-05-03 15:06:18 +0100183 u32 asle_stat = 0;
184 u32 asle_req;
185
186 if (!asle)
187 return;
188
189 asle_req = asle->aslc & ASLE_REQ_MSK;
190 if (!asle_req) {
191 DRM_DEBUG_DRIVER("non asle set request??\n");
192 return;
193 }
194
195 if (asle_req & ASLE_SET_BACKLIGHT)
Patrik Jakobsson778e26d2014-03-11 18:51:20 +0100196 asle_stat |= asle_set_backlight(dev_priv->dev, asle->bclp);
Alan Coxd839ede2012-05-03 15:06:18 +0100197
198 asle->aslc = asle_stat;
Patrik Jakobsson778e26d2014-03-11 18:51:20 +0100199
200}
201
202void psb_intel_opregion_asle_intr(struct drm_device *dev)
203{
204 struct drm_psb_private *dev_priv = dev->dev_private;
205
206 if (dev_priv->opregion.asle)
207 schedule_work(&dev_priv->opregion.asle_work);
Alan Coxd839ede2012-05-03 15:06:18 +0100208}
209
210#define ASLE_ALS_EN (1<<0)
211#define ASLE_BLC_EN (1<<1)
212#define ASLE_PFIT_EN (1<<2)
213#define ASLE_PFMB_EN (1<<3)
214
215void psb_intel_opregion_enable_asle(struct drm_device *dev)
216{
217 struct drm_psb_private *dev_priv = dev->dev_private;
218 struct opregion_asle *asle = dev_priv->opregion.asle;
219
Alan Cox166973e2012-07-16 17:52:45 +0100220 if (asle && system_opregion ) {
Alan Coxd839ede2012-05-03 15:06:18 +0100221 /* Don't do this on Medfield or other non PC like devices, they
222 use the bit for something different altogether */
223 psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
224 psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
225
226 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN
227 | ASLE_PFMB_EN;
228 asle->ardy = 1;
229 }
230}
231
232#define ACPI_EV_DISPLAY_SWITCH (1<<0)
233#define ACPI_EV_LID (1<<1)
234#define ACPI_EV_DOCK (1<<2)
235
Alan Coxd839ede2012-05-03 15:06:18 +0100236
237static int psb_intel_opregion_video_event(struct notifier_block *nb,
238 unsigned long val, void *data)
239{
240 /* The only video events relevant to opregion are 0x80. These indicate
241 either a docking event, lid switch or display switch request. In
242 Linux, these are handled by the dock, button and video drivers.
243 We might want to fix the video driver to be opregion-aware in
244 future, but right now we just indicate to the firmware that the
245 request has been handled */
246
247 struct opregion_acpi *acpi;
248
249 if (!system_opregion)
250 return NOTIFY_DONE;
251
252 acpi = system_opregion->acpi;
253 acpi->csts = 0;
254
255 return NOTIFY_OK;
256}
257
258static struct notifier_block psb_intel_opregion_notifier = {
259 .notifier_call = psb_intel_opregion_video_event,
260};
261
262void psb_intel_opregion_init(struct drm_device *dev)
263{
264 struct drm_psb_private *dev_priv = dev->dev_private;
265 struct psb_intel_opregion *opregion = &dev_priv->opregion;
266
267 if (!opregion->header)
268 return;
269
270 if (opregion->acpi) {
271 /* Notify BIOS we are ready to handle ACPI video ext notifs.
272 * Right now, all the events are handled by the ACPI video
273 * module. We don't actually need to do anything with them. */
274 opregion->acpi->csts = 0;
275 opregion->acpi->drdy = 1;
276
277 system_opregion = opregion;
278 register_acpi_notifier(&psb_intel_opregion_notifier);
279 }
Alan Coxd839ede2012-05-03 15:06:18 +0100280}
281
282void psb_intel_opregion_fini(struct drm_device *dev)
283{
284 struct drm_psb_private *dev_priv = dev->dev_private;
285 struct psb_intel_opregion *opregion = &dev_priv->opregion;
286
287 if (!opregion->header)
288 return;
289
290 if (opregion->acpi) {
291 opregion->acpi->drdy = 0;
292
293 system_opregion = NULL;
294 unregister_acpi_notifier(&psb_intel_opregion_notifier);
295 }
296
Patrik Jakobsson778e26d2014-03-11 18:51:20 +0100297 cancel_work_sync(&opregion->asle_work);
298
Alan Coxd839ede2012-05-03 15:06:18 +0100299 /* just clear all opregion memory pointers now */
300 iounmap(opregion->header);
301 opregion->header = NULL;
302 opregion->acpi = NULL;
303 opregion->swsci = NULL;
304 opregion->asle = NULL;
305 opregion->vbt = NULL;
306}
307
308int psb_intel_opregion_setup(struct drm_device *dev)
309{
310 struct drm_psb_private *dev_priv = dev->dev_private;
311 struct psb_intel_opregion *opregion = &dev_priv->opregion;
312 u32 opregion_phy, mboxes;
Kirill A. Shutemovd64363c2012-05-03 15:09:03 +0100313 void __iomem *base;
Alan Coxd839ede2012-05-03 15:06:18 +0100314 int err = 0;
315
316 pci_read_config_dword(dev->pdev, PCI_ASLS, &opregion_phy);
317 if (opregion_phy == 0) {
318 DRM_DEBUG_DRIVER("ACPI Opregion not supported\n");
319 return -ENOTSUPP;
320 }
Patrik Jakobsson778e26d2014-03-11 18:51:20 +0100321
322 INIT_WORK(&opregion->asle_work, psb_intel_opregion_asle_work);
323
Alan Coxd839ede2012-05-03 15:06:18 +0100324 DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy);
Alan Coxd839ede2012-05-03 15:06:18 +0100325 base = acpi_os_ioremap(opregion_phy, 8*1024);
Alan Coxd839ede2012-05-03 15:06:18 +0100326 if (!base)
327 return -ENOMEM;
328
329 if (memcmp(base, OPREGION_SIGNATURE, 16)) {
330 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
331 err = -EINVAL;
332 goto err_out;
333 }
334
335 opregion->header = base;
336 opregion->vbt = base + OPREGION_VBT_OFFSET;
337
338 opregion->lid_state = base + ACPI_CLID;
339
340 mboxes = opregion->header->mboxes;
341 if (mboxes & MBOX_ACPI) {
342 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
343 opregion->acpi = base + OPREGION_ACPI_OFFSET;
344 }
345
346 if (mboxes & MBOX_ASLE) {
347 DRM_DEBUG_DRIVER("ASLE supported\n");
348 opregion->asle = base + OPREGION_ASLE_OFFSET;
349 }
350
351 return 0;
352
353err_out:
354 iounmap(base);
355 return err;
356}
357