blob: 954acb2c7021d8eb9a90fe1e49ea5bc806f1f344 [file] [log] [blame]
Thomas Richter7434a252012-07-18 19:22:30 +02001/*
2 *
3 * Copyright (c) 2012 Gilles Dartiguelongue, Thomas Richter
4 *
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 */
28
29#include "dvo.h"
30#include "i915_reg.h"
31#include "i915_drv.h"
32
33#define NS2501_VID 0x1305
34#define NS2501_DID 0x6726
35
36#define NS2501_VID_LO 0x00
37#define NS2501_VID_HI 0x01
38#define NS2501_DID_LO 0x02
39#define NS2501_DID_HI 0x03
40#define NS2501_REV 0x04
41#define NS2501_RSVD 0x05
42#define NS2501_FREQ_LO 0x06
43#define NS2501_FREQ_HI 0x07
44
45#define NS2501_REG8 0x08
46#define NS2501_8_VEN (1<<5)
47#define NS2501_8_HEN (1<<4)
48#define NS2501_8_DSEL (1<<3)
49#define NS2501_8_BPAS (1<<2)
50#define NS2501_8_RSVD (1<<1)
51#define NS2501_8_PD (1<<0)
52
53#define NS2501_REG9 0x09
54#define NS2501_9_VLOW (1<<7)
55#define NS2501_9_MSEL_MASK (0x7<<4)
56#define NS2501_9_TSEL (1<<3)
57#define NS2501_9_RSEN (1<<2)
58#define NS2501_9_RSVD (1<<1)
59#define NS2501_9_MDI (1<<0)
60
61#define NS2501_REGC 0x0c
62
63struct ns2501_priv {
64 //I2CDevRec d;
65 bool quiet;
66 int reg_8_shadow;
67 int reg_8_set;
68 // Shadow registers for i915
69 int dvoc;
70 int pll_a;
71 int srcdim;
72 int fw_blc;
73};
74
75#define NSPTR(d) ((NS2501Ptr)(d->DriverPrivate.ptr))
76
77/*
Thomas Richter7434a252012-07-18 19:22:30 +020078 * For reasons unclear to me, the ns2501 at least on the Fujitsu/Siemens
79 * laptops does not react on the i2c bus unless
80 * both the PLL is running and the display is configured in its native
81 * resolution.
82 * This function forces the DVO on, and stores the registers it touches.
83 * Afterwards, registers are restored to regular values.
84 *
85 * This is pretty much a hack, though it works.
86 * Without that, ns2501_readb and ns2501_writeb fail
87 * when switching the resolution.
88 */
89
Thomas Richter7434a252012-07-18 19:22:30 +020090/*
91** Read a register from the ns2501.
92** Returns true if successful, false otherwise.
93** If it returns false, it might be wise to enable the
94** DVO with the above function.
95*/
96static bool ns2501_readb(struct intel_dvo_device *dvo, int addr, uint8_t * ch)
97{
98 struct ns2501_priv *ns = dvo->dev_priv;
99 struct i2c_adapter *adapter = dvo->i2c_bus;
100 u8 out_buf[2];
101 u8 in_buf[2];
102
103 struct i2c_msg msgs[] = {
104 {
105 .addr = dvo->slave_addr,
106 .flags = 0,
107 .len = 1,
108 .buf = out_buf,
109 },
110 {
111 .addr = dvo->slave_addr,
112 .flags = I2C_M_RD,
113 .len = 1,
114 .buf = in_buf,
115 }
116 };
117
118 out_buf[0] = addr;
119 out_buf[1] = 0;
120
121 if (i2c_transfer(adapter, msgs, 2) == 2) {
122 *ch = in_buf[0];
123 return true;
124 };
125
126 if (!ns->quiet) {
127 DRM_DEBUG_KMS
128 ("Unable to read register 0x%02x from %s:0x%02x.\n", addr,
129 adapter->name, dvo->slave_addr);
130 }
131
132 return false;
133}
134
135/*
136** Write a register to the ns2501.
137** Returns true if successful, false otherwise.
138** If it returns false, it might be wise to enable the
139** DVO with the above function.
140*/
141static bool ns2501_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
142{
143 struct ns2501_priv *ns = dvo->dev_priv;
144 struct i2c_adapter *adapter = dvo->i2c_bus;
145 uint8_t out_buf[2];
146
147 struct i2c_msg msg = {
148 .addr = dvo->slave_addr,
149 .flags = 0,
150 .len = 2,
151 .buf = out_buf,
152 };
153
154 out_buf[0] = addr;
155 out_buf[1] = ch;
156
157 if (i2c_transfer(adapter, &msg, 1) == 1) {
158 return true;
159 }
160
161 if (!ns->quiet) {
162 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d\n",
163 addr, adapter->name, dvo->slave_addr);
164 }
165
166 return false;
167}
168
169/* National Semiconductor 2501 driver for chip on i2c bus
170 * scan for the chip on the bus.
171 * Hope the VBIOS initialized the PLL correctly so we can
172 * talk to it. If not, it will not be seen and not detected.
173 * Bummer!
174 */
175static bool ns2501_init(struct intel_dvo_device *dvo,
176 struct i2c_adapter *adapter)
177{
178 /* this will detect the NS2501 chip on the specified i2c bus */
179 struct ns2501_priv *ns;
180 unsigned char ch;
181
182 ns = kzalloc(sizeof(struct ns2501_priv), GFP_KERNEL);
183 if (ns == NULL)
184 return false;
185
186 dvo->i2c_bus = adapter;
187 dvo->dev_priv = ns;
188 ns->quiet = true;
189
190 if (!ns2501_readb(dvo, NS2501_VID_LO, &ch))
191 goto out;
192
193 if (ch != (NS2501_VID & 0xff)) {
194 DRM_DEBUG_KMS("ns2501 not detected got %d: from %s Slave %d.\n",
195 ch, adapter->name, dvo->slave_addr);
196 goto out;
197 }
198
199 if (!ns2501_readb(dvo, NS2501_DID_LO, &ch))
200 goto out;
201
202 if (ch != (NS2501_DID & 0xff)) {
203 DRM_DEBUG_KMS("ns2501 not detected got %d: from %s Slave %d.\n",
204 ch, adapter->name, dvo->slave_addr);
205 goto out;
206 }
207 ns->quiet = false;
208 ns->reg_8_set = 0;
209 ns->reg_8_shadow =
210 NS2501_8_PD | NS2501_8_BPAS | NS2501_8_VEN | NS2501_8_HEN;
211
212 DRM_DEBUG_KMS("init ns2501 dvo controller successfully!\n");
213 return true;
214
215out:
216 kfree(ns);
217 return false;
218}
219
220static enum drm_connector_status ns2501_detect(struct intel_dvo_device *dvo)
221{
222 /*
223 * This is a Laptop display, it doesn't have hotplugging.
224 * Even if not, the detection bit of the 2501 is unreliable as
225 * it only works for some display types.
226 * It is even more unreliable as the PLL must be active for
227 * allowing reading from the chiop.
228 */
229 return connector_status_connected;
230}
231
232static enum drm_mode_status ns2501_mode_valid(struct intel_dvo_device *dvo,
233 struct drm_display_mode *mode)
234{
235 DRM_DEBUG_KMS
236 ("%s: is mode valid (hdisplay=%d,htotal=%d,vdisplay=%d,vtotal=%d)\n",
237 __FUNCTION__, mode->hdisplay, mode->htotal, mode->vdisplay,
238 mode->vtotal);
239
240 /*
241 * Currently, these are all the modes I have data from.
242 * More might exist. Unclear how to find the native resolution
243 * of the panel in here so we could always accept it
244 * by disabling the scaler.
245 */
246 if ((mode->hdisplay == 800 && mode->vdisplay == 600) ||
247 (mode->hdisplay == 640 && mode->vdisplay == 480) ||
248 (mode->hdisplay == 1024 && mode->vdisplay == 768)) {
249 return MODE_OK;
250 } else {
251 return MODE_ONE_SIZE; /* Is this a reasonable error? */
252 }
253}
254
255static void ns2501_mode_set(struct intel_dvo_device *dvo,
256 struct drm_display_mode *mode,
257 struct drm_display_mode *adjusted_mode)
258{
259 bool ok;
Daniel Vetterc77ba212013-10-08 12:25:43 +0200260 int retries = 10;
Thomas Richter7434a252012-07-18 19:22:30 +0200261 struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv);
262
263 DRM_DEBUG_KMS
264 ("%s: set mode (hdisplay=%d,htotal=%d,vdisplay=%d,vtotal=%d).\n",
265 __FUNCTION__, mode->hdisplay, mode->htotal, mode->vdisplay,
266 mode->vtotal);
267
268 /*
269 * Where do I find the native resolution for which scaling is not required???
270 *
271 * First trigger the DVO on as otherwise the chip does not appear on the i2c
272 * bus.
273 */
274 do {
275 ok = true;
276
277 if (mode->hdisplay == 800 && mode->vdisplay == 600) {
278 /* mode 277 */
279 ns->reg_8_shadow &= ~NS2501_8_BPAS;
280 DRM_DEBUG_KMS("%s: switching to 800x600\n",
281 __FUNCTION__);
282
283 /*
284 * No, I do not know where this data comes from.
285 * It is just what the video bios left in the DVO, so
286 * I'm just copying it here over.
287 * This also means that I cannot support any other modes
288 * except the ones supported by the bios.
289 */
290 ok &= ns2501_writeb(dvo, 0x11, 0xc8); // 0xc7 also works.
291 ok &= ns2501_writeb(dvo, 0x1b, 0x19);
292 ok &= ns2501_writeb(dvo, 0x1c, 0x62); // VBIOS left 0x64 here, but 0x62 works nicer
293 ok &= ns2501_writeb(dvo, 0x1d, 0x02);
294
295 ok &= ns2501_writeb(dvo, 0x34, 0x03);
296 ok &= ns2501_writeb(dvo, 0x35, 0xff);
297
298 ok &= ns2501_writeb(dvo, 0x80, 0x27);
299 ok &= ns2501_writeb(dvo, 0x81, 0x03);
300 ok &= ns2501_writeb(dvo, 0x82, 0x41);
301 ok &= ns2501_writeb(dvo, 0x83, 0x05);
302
303 ok &= ns2501_writeb(dvo, 0x8d, 0x02);
304 ok &= ns2501_writeb(dvo, 0x8e, 0x04);
305 ok &= ns2501_writeb(dvo, 0x8f, 0x00);
306
307 ok &= ns2501_writeb(dvo, 0x90, 0xfe); /* vertical. VBIOS left 0xff here, but 0xfe works better */
308 ok &= ns2501_writeb(dvo, 0x91, 0x07);
309 ok &= ns2501_writeb(dvo, 0x94, 0x00);
310 ok &= ns2501_writeb(dvo, 0x95, 0x00);
311
312 ok &= ns2501_writeb(dvo, 0x96, 0x00);
313
314 ok &= ns2501_writeb(dvo, 0x99, 0x00);
315 ok &= ns2501_writeb(dvo, 0x9a, 0x88);
316
317 ok &= ns2501_writeb(dvo, 0x9c, 0x23); /* Looks like first and last line of the image. */
318 ok &= ns2501_writeb(dvo, 0x9d, 0x00);
319 ok &= ns2501_writeb(dvo, 0x9e, 0x25);
320 ok &= ns2501_writeb(dvo, 0x9f, 0x03);
321
322 ok &= ns2501_writeb(dvo, 0xa4, 0x80);
323
324 ok &= ns2501_writeb(dvo, 0xb6, 0x00);
325
326 ok &= ns2501_writeb(dvo, 0xb9, 0xc8); /* horizontal? */
327 ok &= ns2501_writeb(dvo, 0xba, 0x00); /* horizontal? */
328
329 ok &= ns2501_writeb(dvo, 0xc0, 0x05); /* horizontal? */
330 ok &= ns2501_writeb(dvo, 0xc1, 0xd7);
331
332 ok &= ns2501_writeb(dvo, 0xc2, 0x00);
333 ok &= ns2501_writeb(dvo, 0xc3, 0xf8);
334
335 ok &= ns2501_writeb(dvo, 0xc4, 0x03);
336 ok &= ns2501_writeb(dvo, 0xc5, 0x1a);
337
338 ok &= ns2501_writeb(dvo, 0xc6, 0x00);
339 ok &= ns2501_writeb(dvo, 0xc7, 0x73);
340 ok &= ns2501_writeb(dvo, 0xc8, 0x02);
341
342 } else if (mode->hdisplay == 640 && mode->vdisplay == 480) {
343 /* mode 274 */
344 DRM_DEBUG_KMS("%s: switching to 640x480\n",
345 __FUNCTION__);
346 /*
347 * No, I do not know where this data comes from.
348 * It is just what the video bios left in the DVO, so
349 * I'm just copying it here over.
350 * This also means that I cannot support any other modes
351 * except the ones supported by the bios.
352 */
353 ns->reg_8_shadow &= ~NS2501_8_BPAS;
354
355 ok &= ns2501_writeb(dvo, 0x11, 0xa0);
356 ok &= ns2501_writeb(dvo, 0x1b, 0x11);
357 ok &= ns2501_writeb(dvo, 0x1c, 0x54);
358 ok &= ns2501_writeb(dvo, 0x1d, 0x03);
359
360 ok &= ns2501_writeb(dvo, 0x34, 0x03);
361 ok &= ns2501_writeb(dvo, 0x35, 0xff);
362
363 ok &= ns2501_writeb(dvo, 0x80, 0xff);
364 ok &= ns2501_writeb(dvo, 0x81, 0x07);
365 ok &= ns2501_writeb(dvo, 0x82, 0x3d);
366 ok &= ns2501_writeb(dvo, 0x83, 0x05);
367
368 ok &= ns2501_writeb(dvo, 0x8d, 0x02);
369 ok &= ns2501_writeb(dvo, 0x8e, 0x10);
370 ok &= ns2501_writeb(dvo, 0x8f, 0x00);
371
372 ok &= ns2501_writeb(dvo, 0x90, 0xff); /* vertical */
373 ok &= ns2501_writeb(dvo, 0x91, 0x07);
374 ok &= ns2501_writeb(dvo, 0x94, 0x00);
375 ok &= ns2501_writeb(dvo, 0x95, 0x00);
376
377 ok &= ns2501_writeb(dvo, 0x96, 0x05);
378
379 ok &= ns2501_writeb(dvo, 0x99, 0x00);
380 ok &= ns2501_writeb(dvo, 0x9a, 0x88);
381
382 ok &= ns2501_writeb(dvo, 0x9c, 0x24);
383 ok &= ns2501_writeb(dvo, 0x9d, 0x00);
384 ok &= ns2501_writeb(dvo, 0x9e, 0x25);
385 ok &= ns2501_writeb(dvo, 0x9f, 0x03);
386
387 ok &= ns2501_writeb(dvo, 0xa4, 0x84);
388
389 ok &= ns2501_writeb(dvo, 0xb6, 0x09);
390
391 ok &= ns2501_writeb(dvo, 0xb9, 0xa0); /* horizontal? */
392 ok &= ns2501_writeb(dvo, 0xba, 0x00); /* horizontal? */
393
394 ok &= ns2501_writeb(dvo, 0xc0, 0x05); /* horizontal? */
395 ok &= ns2501_writeb(dvo, 0xc1, 0x90);
396
397 ok &= ns2501_writeb(dvo, 0xc2, 0x00);
398 ok &= ns2501_writeb(dvo, 0xc3, 0x0f);
399
400 ok &= ns2501_writeb(dvo, 0xc4, 0x03);
401 ok &= ns2501_writeb(dvo, 0xc5, 0x16);
402
403 ok &= ns2501_writeb(dvo, 0xc6, 0x00);
404 ok &= ns2501_writeb(dvo, 0xc7, 0x02);
405 ok &= ns2501_writeb(dvo, 0xc8, 0x02);
406
407 } else if (mode->hdisplay == 1024 && mode->vdisplay == 768) {
408 /* mode 280 */
409 DRM_DEBUG_KMS("%s: switching to 1024x768\n",
410 __FUNCTION__);
411 /*
412 * This might or might not work, actually. I'm silently
413 * assuming here that the native panel resolution is
414 * 1024x768. If not, then this leaves the scaler disabled
415 * generating a picture that is likely not the expected.
416 *
417 * Problem is that I do not know where to take the panel
418 * dimensions from.
419 *
420 * Enable the bypass, scaling not required.
421 *
422 * The scaler registers are irrelevant here....
423 *
424 */
425 ns->reg_8_shadow |= NS2501_8_BPAS;
426 ok &= ns2501_writeb(dvo, 0x37, 0x44);
427 } else {
428 /*
429 * Data not known. Bummer!
430 * Hopefully, the code should not go here
431 * as mode_OK delivered no other modes.
432 */
433 ns->reg_8_shadow |= NS2501_8_BPAS;
434 }
435 ok &= ns2501_writeb(dvo, NS2501_REG8, ns->reg_8_shadow);
Daniel Vetterc77ba212013-10-08 12:25:43 +0200436 } while (!ok && retries--);
Thomas Richter7434a252012-07-18 19:22:30 +0200437}
438
439/* set the NS2501 power state */
Daniel Vetter732ce742012-07-02 15:09:45 +0200440static bool ns2501_get_hw_state(struct intel_dvo_device *dvo)
441{
442 unsigned char ch;
443
444 if (!ns2501_readb(dvo, NS2501_REG8, &ch))
445 return false;
446
447 if (ch & NS2501_8_PD)
448 return true;
449 else
450 return false;
451}
452
453/* set the NS2501 power state */
Daniel Vetterfac32742012-08-12 19:27:12 +0200454static void ns2501_dpms(struct intel_dvo_device *dvo, bool enable)
Thomas Richter7434a252012-07-18 19:22:30 +0200455{
456 bool ok;
Daniel Vetterc77ba212013-10-08 12:25:43 +0200457 int retries = 10;
Thomas Richter7434a252012-07-18 19:22:30 +0200458 struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv);
459 unsigned char ch;
460
Daniel Vetterfac32742012-08-12 19:27:12 +0200461 DRM_DEBUG_KMS("%s: Trying set the dpms of the DVO to %i\n",
462 __FUNCTION__, enable);
Thomas Richter7434a252012-07-18 19:22:30 +0200463
464 ch = ns->reg_8_shadow;
465
Daniel Vetterfac32742012-08-12 19:27:12 +0200466 if (enable)
Thomas Richter7434a252012-07-18 19:22:30 +0200467 ch |= NS2501_8_PD;
468 else
469 ch &= ~NS2501_8_PD;
470
471 if (ns->reg_8_set == 0 || ns->reg_8_shadow != ch) {
472 ns->reg_8_set = 1;
473 ns->reg_8_shadow = ch;
474
475 do {
476 ok = true;
477 ok &= ns2501_writeb(dvo, NS2501_REG8, ch);
478 ok &=
479 ns2501_writeb(dvo, 0x34,
Daniel Vetterfac32742012-08-12 19:27:12 +0200480 enable ? 0x03 : 0x00);
Thomas Richter7434a252012-07-18 19:22:30 +0200481 ok &=
482 ns2501_writeb(dvo, 0x35,
Daniel Vetterfac32742012-08-12 19:27:12 +0200483 enable ? 0xff : 0x00);
Daniel Vetterc77ba212013-10-08 12:25:43 +0200484 } while (!ok && retries--);
Thomas Richter7434a252012-07-18 19:22:30 +0200485 }
486}
487
488static void ns2501_dump_regs(struct intel_dvo_device *dvo)
489{
490 uint8_t val;
491
492 ns2501_readb(dvo, NS2501_FREQ_LO, &val);
493 DRM_LOG_KMS("NS2501_FREQ_LO: 0x%02x\n", val);
494 ns2501_readb(dvo, NS2501_FREQ_HI, &val);
495 DRM_LOG_KMS("NS2501_FREQ_HI: 0x%02x\n", val);
496 ns2501_readb(dvo, NS2501_REG8, &val);
497 DRM_LOG_KMS("NS2501_REG8: 0x%02x\n", val);
498 ns2501_readb(dvo, NS2501_REG9, &val);
499 DRM_LOG_KMS("NS2501_REG9: 0x%02x\n", val);
500 ns2501_readb(dvo, NS2501_REGC, &val);
501 DRM_LOG_KMS("NS2501_REGC: 0x%02x\n", val);
502}
503
504static void ns2501_destroy(struct intel_dvo_device *dvo)
505{
506 struct ns2501_priv *ns = dvo->dev_priv;
507
508 if (ns) {
509 kfree(ns);
510 dvo->dev_priv = NULL;
511 }
512}
513
514struct intel_dvo_dev_ops ns2501_ops = {
515 .init = ns2501_init,
516 .detect = ns2501_detect,
517 .mode_valid = ns2501_mode_valid,
518 .mode_set = ns2501_mode_set,
519 .dpms = ns2501_dpms,
Daniel Vetter732ce742012-07-02 15:09:45 +0200520 .get_hw_state = ns2501_get_hw_state,
Thomas Richter7434a252012-07-18 19:22:30 +0200521 .dump_regs = ns2501_dump_regs,
522 .destroy = ns2501_destroy,
523};