blob: 483fdce74e39a0dfbbfcc8a98e13cd3dd1667652 [file] [log] [blame]
Alan Cox89c78132011-11-03 18:22:15 +00001/*
2 * Copyright © 2006-2007 Intel Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Authors:
18 * Eric Anholt <eric@anholt.net>
19 * Dave Airlie <airlied@linux.ie>
20 * Jesse Barnes <jesse.barnes@intel.com>
21 */
22
23#include <linux/i2c.h>
24#include <drm/drmP.h>
25
26#include "intel_bios.h"
27#include "psb_drv.h"
28#include "psb_intel_drv.h"
29#include "psb_intel_reg.h"
30#include "power.h"
31#include <linux/pm_runtime.h>
32
33/*
34 * LVDS I2C backlight control macros
35 */
36#define BRIGHTNESS_MAX_LEVEL 100
37#define BRIGHTNESS_MASK 0xFF
38#define BLC_I2C_TYPE 0x01
39#define BLC_PWM_TYPT 0x02
40
41#define BLC_POLARITY_NORMAL 0
42#define BLC_POLARITY_INVERSE 1
43
44#define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
45#define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
46#define PSB_BLC_PWM_PRECISION_FACTOR (10)
47#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
48#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
49
50struct psb_intel_lvds_priv {
51 /*
52 * Saved LVDO output states
53 */
54 uint32_t savePP_ON;
55 uint32_t savePP_OFF;
56 uint32_t saveLVDS;
57 uint32_t savePP_CONTROL;
58 uint32_t savePP_CYCLE;
59 uint32_t savePFIT_CONTROL;
60 uint32_t savePFIT_PGM_RATIOS;
61 uint32_t saveBLC_PWM_CTL;
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +000062
63 struct psb_intel_i2c_chan *i2c_bus;
64 struct psb_intel_i2c_chan *ddc_bus;
Alan Cox89c78132011-11-03 18:22:15 +000065};
66
67
68/*
69 * Returns the maximum level of the backlight duty cycle field.
70 */
71static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev)
72{
73 struct drm_psb_private *dev_priv = dev->dev_private;
Alan Cox1f0d0b52011-11-29 22:26:58 +000074 u32 ret;
Alan Cox89c78132011-11-03 18:22:15 +000075
76 if (gma_power_begin(dev, false)) {
Alan Cox1f0d0b52011-11-29 22:26:58 +000077 ret = REG_READ(BLC_PWM_CTL);
Alan Cox89c78132011-11-03 18:22:15 +000078 gma_power_end(dev);
Alan Cox1f0d0b52011-11-29 22:26:58 +000079 } else /* Powered off, use the saved value */
Alan Cox648a8e32012-03-08 16:00:31 +000080 ret = dev_priv->regs.saveBLC_PWM_CTL;
Alan Cox89c78132011-11-03 18:22:15 +000081
Alan Cox1f0d0b52011-11-29 22:26:58 +000082 /* Top 15bits hold the frequency mask */
83 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >>
84 BACKLIGHT_MODULATION_FREQ_SHIFT;
85
86 ret *= 2; /* Return a 16bit range as needed for setting */
87 if (ret == 0)
88 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n",
Alan Cox648a8e32012-03-08 16:00:31 +000089 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL);
Alan Cox1f0d0b52011-11-29 22:26:58 +000090 return ret;
Alan Cox89c78132011-11-03 18:22:15 +000091}
92
93/*
94 * Set LVDS backlight level by I2C command
95 *
96 * FIXME: at some point we need to both track this for PM and also
97 * disable runtime pm on MRST if the brightness is nil (ie blanked)
98 */
99static int psb_lvds_i2c_set_brightness(struct drm_device *dev,
100 unsigned int level)
101{
102 struct drm_psb_private *dev_priv =
103 (struct drm_psb_private *)dev->dev_private;
104
105 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus;
106 u8 out_buf[2];
107 unsigned int blc_i2c_brightness;
108
109 struct i2c_msg msgs[] = {
110 {
111 .addr = lvds_i2c_bus->slave_addr,
112 .flags = 0,
113 .len = 2,
114 .buf = out_buf,
115 }
116 };
117
118 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level *
119 BRIGHTNESS_MASK /
120 BRIGHTNESS_MAX_LEVEL);
121
122 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
123 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness;
124
125 out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
126 out_buf[1] = (u8)blc_i2c_brightness;
127
128 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) {
129 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n",
130 dev_priv->lvds_bl->brightnesscmd,
131 blc_i2c_brightness);
132 return 0;
133 }
134
135 dev_err(dev->dev, "I2C transfer error\n");
136 return -1;
137}
138
139
140static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
141{
142 struct drm_psb_private *dev_priv =
143 (struct drm_psb_private *)dev->dev_private;
144
145 u32 max_pwm_blc;
146 u32 blc_pwm_duty_cycle;
147
148 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev);
149
150 /*BLC_PWM_CTL Should be initiated while backlight device init*/
Alan Cox1f0d0b52011-11-29 22:26:58 +0000151 BUG_ON(max_pwm_blc == 0);
Alan Cox89c78132011-11-03 18:22:15 +0000152
153 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
154
155 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
156 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle;
157
158 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
159 REG_WRITE(BLC_PWM_CTL,
160 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
161 (blc_pwm_duty_cycle));
162
Alan Cox1f0d0b52011-11-29 22:26:58 +0000163 dev_info(dev->dev, "Backlight lvds set brightness %08x\n",
164 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
165 (blc_pwm_duty_cycle));
166
Alan Cox89c78132011-11-03 18:22:15 +0000167 return 0;
168}
169
170/*
171 * Set LVDS backlight level either by I2C or PWM
172 */
173void psb_intel_lvds_set_brightness(struct drm_device *dev, int level)
174{
Alan Cox1f0d0b52011-11-29 22:26:58 +0000175 struct drm_psb_private *dev_priv = dev->dev_private;
Alan Cox89c78132011-11-03 18:22:15 +0000176
177 dev_dbg(dev->dev, "backlight level is %d\n", level);
178
179 if (!dev_priv->lvds_bl) {
Alan Cox1f0d0b52011-11-29 22:26:58 +0000180 dev_err(dev->dev, "NO LVDS backlight info\n");
Alan Cox89c78132011-11-03 18:22:15 +0000181 return;
182 }
183
184 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
185 psb_lvds_i2c_set_brightness(dev, level);
186 else
187 psb_lvds_pwm_set_brightness(dev, level);
188}
189
190/*
191 * Sets the backlight level.
192 *
193 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight().
194 */
195static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level)
196{
197 struct drm_psb_private *dev_priv = dev->dev_private;
198 u32 blc_pwm_ctl;
199
200 if (gma_power_begin(dev, false)) {
Alan Cox1f0d0b52011-11-29 22:26:58 +0000201 blc_pwm_ctl = REG_READ(BLC_PWM_CTL);
202 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
Alan Cox89c78132011-11-03 18:22:15 +0000203 REG_WRITE(BLC_PWM_CTL,
204 (blc_pwm_ctl |
205 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
Alan Cox648a8e32012-03-08 16:00:31 +0000206 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
Alan Cox1f0d0b52011-11-29 22:26:58 +0000207 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
Alan Cox89c78132011-11-03 18:22:15 +0000208 gma_power_end(dev);
209 } else {
Alan Cox648a8e32012-03-08 16:00:31 +0000210 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
Alan Cox89c78132011-11-03 18:22:15 +0000211 ~BACKLIGHT_DUTY_CYCLE_MASK;
Alan Cox648a8e32012-03-08 16:00:31 +0000212 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
Alan Cox89c78132011-11-03 18:22:15 +0000213 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
214 }
215}
216
217/*
218 * Sets the power state for the panel.
219 */
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000220static void psb_intel_lvds_set_power(struct drm_device *dev, bool on)
Alan Cox89c78132011-11-03 18:22:15 +0000221{
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000222 struct drm_psb_private *dev_priv = dev->dev_private;
223 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
Alan Cox89c78132011-11-03 18:22:15 +0000224 u32 pp_status;
225
Alan Cox1f0d0b52011-11-29 22:26:58 +0000226 if (!gma_power_begin(dev, true)) {
227 dev_err(dev->dev, "set power, chip off!\n");
Alan Cox89c78132011-11-03 18:22:15 +0000228 return;
Alan Cox1f0d0b52011-11-29 22:26:58 +0000229 }
230
Alan Cox89c78132011-11-03 18:22:15 +0000231 if (on) {
232 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
233 POWER_TARGET_ON);
234 do {
235 pp_status = REG_READ(PP_STATUS);
236 } while ((pp_status & PP_ON) == 0);
237
238 psb_intel_lvds_set_backlight(dev,
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000239 mode_dev->backlight_duty_cycle);
Alan Cox89c78132011-11-03 18:22:15 +0000240 } else {
241 psb_intel_lvds_set_backlight(dev, 0);
242
243 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
244 ~POWER_TARGET_ON);
245 do {
246 pp_status = REG_READ(PP_STATUS);
247 } while (pp_status & PP_ON);
248 }
249
250 gma_power_end(dev);
251}
252
253static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
254{
255 struct drm_device *dev = encoder->dev;
Alan Cox89c78132011-11-03 18:22:15 +0000256
257 if (mode == DRM_MODE_DPMS_ON)
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000258 psb_intel_lvds_set_power(dev, true);
Alan Cox89c78132011-11-03 18:22:15 +0000259 else
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000260 psb_intel_lvds_set_power(dev, false);
Alan Cox89c78132011-11-03 18:22:15 +0000261
262 /* XXX: We never power down the LVDS pairs. */
263}
264
265static void psb_intel_lvds_save(struct drm_connector *connector)
266{
267 struct drm_device *dev = connector->dev;
268 struct drm_psb_private *dev_priv =
269 (struct drm_psb_private *)dev->dev_private;
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200270 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
Alan Cox89c78132011-11-03 18:22:15 +0000271 struct psb_intel_lvds_priv *lvds_priv =
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200272 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
Alan Cox89c78132011-11-03 18:22:15 +0000273
274 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON);
275 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF);
276 lvds_priv->saveLVDS = REG_READ(LVDS);
277 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL);
278 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE);
279 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/
280 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
281 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
282 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
283
284 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/
Alan Cox648a8e32012-03-08 16:00:31 +0000285 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL &
Alan Cox89c78132011-11-03 18:22:15 +0000286 BACKLIGHT_DUTY_CYCLE_MASK);
287
288 /*
289 * If the light is off at server startup,
290 * just make it full brightness
291 */
292 if (dev_priv->backlight_duty_cycle == 0)
293 dev_priv->backlight_duty_cycle =
294 psb_intel_lvds_get_max_backlight(dev);
295
296 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
297 lvds_priv->savePP_ON,
298 lvds_priv->savePP_OFF,
299 lvds_priv->saveLVDS,
300 lvds_priv->savePP_CONTROL,
301 lvds_priv->savePP_CYCLE,
302 lvds_priv->saveBLC_PWM_CTL);
303}
304
305static void psb_intel_lvds_restore(struct drm_connector *connector)
306{
307 struct drm_device *dev = connector->dev;
308 u32 pp_status;
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200309 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
Alan Cox89c78132011-11-03 18:22:15 +0000310 struct psb_intel_lvds_priv *lvds_priv =
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200311 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
Alan Cox89c78132011-11-03 18:22:15 +0000312
313 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
314 lvds_priv->savePP_ON,
315 lvds_priv->savePP_OFF,
316 lvds_priv->saveLVDS,
317 lvds_priv->savePP_CONTROL,
318 lvds_priv->savePP_CYCLE,
319 lvds_priv->saveBLC_PWM_CTL);
320
321 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL);
322 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL);
323 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS);
324 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON);
325 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF);
326 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/
327 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE);
328 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL);
329 REG_WRITE(LVDS, lvds_priv->saveLVDS);
330
331 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) {
332 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
333 POWER_TARGET_ON);
334 do {
335 pp_status = REG_READ(PP_STATUS);
336 } while ((pp_status & PP_ON) == 0);
337 } else {
338 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
339 ~POWER_TARGET_ON);
340 do {
341 pp_status = REG_READ(PP_STATUS);
342 } while (pp_status & PP_ON);
343 }
344}
345
346int psb_intel_lvds_mode_valid(struct drm_connector *connector,
347 struct drm_display_mode *mode)
348{
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000349 struct drm_psb_private *dev_priv = connector->dev->dev_private;
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200350 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
Alan Cox89c78132011-11-03 18:22:15 +0000351 struct drm_display_mode *fixed_mode =
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000352 dev_priv->mode_dev.panel_fixed_mode;
Alan Cox89c78132011-11-03 18:22:15 +0000353
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200354 if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000355 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2;
Alan Cox89c78132011-11-03 18:22:15 +0000356
357 /* just in case */
358 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
359 return MODE_NO_DBLESCAN;
360
361 /* just in case */
362 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
363 return MODE_NO_INTERLACE;
364
365 if (fixed_mode) {
366 if (mode->hdisplay > fixed_mode->hdisplay)
367 return MODE_PANEL;
368 if (mode->vdisplay > fixed_mode->vdisplay)
369 return MODE_PANEL;
370 }
371 return MODE_OK;
372}
373
374bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder,
Laurent Pincharte811f5a2012-07-17 17:56:50 +0200375 const struct drm_display_mode *mode,
Alan Cox89c78132011-11-03 18:22:15 +0000376 struct drm_display_mode *adjusted_mode)
377{
Alan Cox89c78132011-11-03 18:22:15 +0000378 struct drm_device *dev = encoder->dev;
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000379 struct drm_psb_private *dev_priv = dev->dev_private;
380 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
Patrik Jakobsson63068652013-07-22 01:31:23 +0200381 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
Alan Cox89c78132011-11-03 18:22:15 +0000382 struct drm_encoder *tmp_encoder;
383 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200384 struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
Alan Cox89c78132011-11-03 18:22:15 +0000385
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200386 if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
Alan Cox89c78132011-11-03 18:22:15 +0000387 panel_fixed_mode = mode_dev->panel_fixed_mode2;
388
Alan Cox89c78132011-11-03 18:22:15 +0000389 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */
Patrik Jakobsson63068652013-07-22 01:31:23 +0200390 if (!IS_MRST(dev) && gma_crtc->pipe == 0) {
Alan Cox89c78132011-11-03 18:22:15 +0000391 printk(KERN_ERR "Can't support LVDS on pipe A\n");
392 return false;
393 }
Patrik Jakobsson63068652013-07-22 01:31:23 +0200394 if (IS_MRST(dev) && gma_crtc->pipe != 0) {
Alan Cox89c78132011-11-03 18:22:15 +0000395 printk(KERN_ERR "Must use PIPE A\n");
396 return false;
397 }
398 /* Should never happen!! */
399 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
400 head) {
401 if (tmp_encoder != encoder
402 && tmp_encoder->crtc == encoder->crtc) {
403 printk(KERN_ERR "Can't enable LVDS and another "
404 "encoder on the same pipe\n");
405 return false;
406 }
407 }
408
409 /*
410 * If we have timings from the BIOS for the panel, put them in
411 * to the adjusted mode. The CRTC will be set up for this mode,
412 * with the panel scaling set up to source from the H/VDisplay
413 * of the original mode.
414 */
415 if (panel_fixed_mode != NULL) {
416 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
417 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
418 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
419 adjusted_mode->htotal = panel_fixed_mode->htotal;
420 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
421 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
422 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
423 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
424 adjusted_mode->clock = panel_fixed_mode->clock;
425 drm_mode_set_crtcinfo(adjusted_mode,
426 CRTC_INTERLACE_HALVE_V);
427 }
428
429 /*
430 * XXX: It would be nice to support lower refresh rates on the
431 * panels to reduce power consumption, and perhaps match the
432 * user's requested refresh rate.
433 */
434
435 return true;
436}
437
438static void psb_intel_lvds_prepare(struct drm_encoder *encoder)
439{
440 struct drm_device *dev = encoder->dev;
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000441 struct drm_psb_private *dev_priv = dev->dev_private;
442 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
Alan Cox89c78132011-11-03 18:22:15 +0000443
444 if (!gma_power_begin(dev, true))
445 return;
446
447 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
448 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
449 BACKLIGHT_DUTY_CYCLE_MASK);
450
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000451 psb_intel_lvds_set_power(dev, false);
Alan Cox89c78132011-11-03 18:22:15 +0000452
453 gma_power_end(dev);
454}
455
456static void psb_intel_lvds_commit(struct drm_encoder *encoder)
457{
458 struct drm_device *dev = encoder->dev;
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000459 struct drm_psb_private *dev_priv = dev->dev_private;
460 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
Alan Cox89c78132011-11-03 18:22:15 +0000461
462 if (mode_dev->backlight_duty_cycle == 0)
463 mode_dev->backlight_duty_cycle =
464 psb_intel_lvds_get_max_backlight(dev);
465
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000466 psb_intel_lvds_set_power(dev, true);
Alan Cox89c78132011-11-03 18:22:15 +0000467}
468
469static void psb_intel_lvds_mode_set(struct drm_encoder *encoder,
470 struct drm_display_mode *mode,
471 struct drm_display_mode *adjusted_mode)
472{
473 struct drm_device *dev = encoder->dev;
474 struct drm_psb_private *dev_priv = dev->dev_private;
475 u32 pfit_control;
476
477 /*
478 * The LVDS pin pair will already have been turned on in the
479 * psb_intel_crtc_mode_set since it has a large impact on the DPLL
480 * settings.
481 */
482
483 /*
484 * Enable automatic panel scaling so that non-native modes fill the
485 * screen. Should be enabled before the pipe is enabled, according to
486 * register description and PRM.
487 */
488 if (mode->hdisplay != adjusted_mode->hdisplay ||
489 mode->vdisplay != adjusted_mode->vdisplay)
490 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
491 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
492 HORIZ_INTERP_BILINEAR);
493 else
494 pfit_control = 0;
495
496 if (dev_priv->lvds_dither)
497 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
498
499 REG_WRITE(PFIT_CONTROL, pfit_control);
500}
501
502/*
Alan Cox89c78132011-11-03 18:22:15 +0000503 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
504 */
505static int psb_intel_lvds_get_modes(struct drm_connector *connector)
506{
507 struct drm_device *dev = connector->dev;
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000508 struct drm_psb_private *dev_priv = dev->dev_private;
509 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200510 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
511 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
Alan Cox89c78132011-11-03 18:22:15 +0000512 int ret = 0;
513
514 if (!IS_MRST(dev))
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000515 ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter);
Alan Cox89c78132011-11-03 18:22:15 +0000516
517 if (ret)
518 return ret;
519
Alan Cox89c78132011-11-03 18:22:15 +0000520 if (mode_dev->panel_fixed_mode != NULL) {
521 struct drm_display_mode *mode =
522 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
523 drm_mode_probed_add(connector, mode);
524 return 1;
525 }
526
527 return 0;
528}
529
530/**
531 * psb_intel_lvds_destroy - unregister and free LVDS structures
532 * @connector: connector to free
533 *
534 * Unregister the DDC bus for this connector then free the driver private
535 * structure.
536 */
537void psb_intel_lvds_destroy(struct drm_connector *connector)
538{
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200539 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
540 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
Alan Cox89c78132011-11-03 18:22:15 +0000541
Markus Elfring44fb4b82016-07-22 10:30:30 +0200542 psb_intel_i2c_destroy(lvds_priv->ddc_bus);
Thomas Wood34ea3d32014-05-29 16:57:41 +0100543 drm_connector_unregister(connector);
Alan Cox89c78132011-11-03 18:22:15 +0000544 drm_connector_cleanup(connector);
545 kfree(connector);
546}
547
548int psb_intel_lvds_set_property(struct drm_connector *connector,
549 struct drm_property *property,
550 uint64_t value)
551{
552 struct drm_encoder *encoder = connector->encoder;
553
554 if (!encoder)
555 return -1;
556
557 if (!strcmp(property->name, "scaling mode")) {
Patrik Jakobsson63068652013-07-22 01:31:23 +0200558 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
Alan Cox89c78132011-11-03 18:22:15 +0000559 uint64_t curval;
560
561 if (!crtc)
562 goto set_prop_error;
563
564 switch (value) {
565 case DRM_MODE_SCALE_FULLSCREEN:
566 break;
567 case DRM_MODE_SCALE_NO_SCALE:
568 break;
569 case DRM_MODE_SCALE_ASPECT:
570 break;
571 default:
572 goto set_prop_error;
573 }
574
Rob Clarka69ac9e2012-10-11 20:38:23 -0500575 if (drm_object_property_get_value(&connector->base,
Alan Cox89c78132011-11-03 18:22:15 +0000576 property,
577 &curval))
578 goto set_prop_error;
579
580 if (curval == value)
581 goto set_prop_done;
582
Rob Clarka69ac9e2012-10-11 20:38:23 -0500583 if (drm_object_property_set_value(&connector->base,
Alan Cox89c78132011-11-03 18:22:15 +0000584 property,
585 value))
586 goto set_prop_error;
587
588 if (crtc->saved_mode.hdisplay != 0 &&
589 crtc->saved_mode.vdisplay != 0) {
590 if (!drm_crtc_helper_set_mode(encoder->crtc,
591 &crtc->saved_mode,
592 encoder->crtc->x,
593 encoder->crtc->y,
Matt Roperf4510a22014-04-01 15:22:40 -0700594 encoder->crtc->primary->fb))
Alan Cox89c78132011-11-03 18:22:15 +0000595 goto set_prop_error;
596 }
597 } else if (!strcmp(property->name, "backlight")) {
Rob Clarka69ac9e2012-10-11 20:38:23 -0500598 if (drm_object_property_set_value(&connector->base,
Alan Cox89c78132011-11-03 18:22:15 +0000599 property,
600 value))
601 goto set_prop_error;
Zhao Yakuid112a812012-08-08 13:55:55 +0000602 else
603 gma_backlight_set(encoder->dev, value);
Alan Cox89c78132011-11-03 18:22:15 +0000604 } else if (!strcmp(property->name, "DPMS")) {
Jani Nikula45fe7342015-03-11 11:51:01 +0200605 const struct drm_encoder_helper_funcs *hfuncs
Alan Cox89c78132011-11-03 18:22:15 +0000606 = encoder->helper_private;
607 hfuncs->dpms(encoder, value);
608 }
609
610set_prop_done:
611 return 0;
612set_prop_error:
613 return -1;
614}
615
616static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = {
617 .dpms = psb_intel_lvds_encoder_dpms,
618 .mode_fixup = psb_intel_lvds_mode_fixup,
619 .prepare = psb_intel_lvds_prepare,
620 .mode_set = psb_intel_lvds_mode_set,
621 .commit = psb_intel_lvds_commit,
622};
623
624const struct drm_connector_helper_funcs
625 psb_intel_lvds_connector_helper_funcs = {
626 .get_modes = psb_intel_lvds_get_modes,
627 .mode_valid = psb_intel_lvds_mode_valid,
Patrik Jakobssonc9d49592013-07-11 01:02:01 +0200628 .best_encoder = gma_best_encoder,
Alan Cox89c78132011-11-03 18:22:15 +0000629};
630
631const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
632 .dpms = drm_helper_connector_dpms,
Alan Cox89c78132011-11-03 18:22:15 +0000633 .fill_modes = drm_helper_probe_single_connector_modes,
634 .set_property = psb_intel_lvds_set_property,
635 .destroy = psb_intel_lvds_destroy,
636};
637
638
639static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder)
640{
641 drm_encoder_cleanup(encoder);
642}
643
644const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = {
645 .destroy = psb_intel_lvds_enc_destroy,
646};
647
648
649
650/**
651 * psb_intel_lvds_init - setup LVDS connectors on this device
652 * @dev: drm device
653 *
654 * Create the connector, register the LVDS DDC bus, and try to figure out what
655 * modes we can display on the LVDS panel (if present).
656 */
657void psb_intel_lvds_init(struct drm_device *dev,
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000658 struct psb_intel_mode_device *mode_dev)
Alan Cox89c78132011-11-03 18:22:15 +0000659{
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200660 struct gma_encoder *gma_encoder;
Patrik Jakobssona3d5d752013-07-22 17:05:25 +0200661 struct gma_connector *gma_connector;
Alan Cox89c78132011-11-03 18:22:15 +0000662 struct psb_intel_lvds_priv *lvds_priv;
663 struct drm_connector *connector;
664 struct drm_encoder *encoder;
665 struct drm_display_mode *scan; /* *modes, *bios_mode; */
666 struct drm_crtc *crtc;
Alan Cox1f0d0b52011-11-29 22:26:58 +0000667 struct drm_psb_private *dev_priv = dev->dev_private;
Alan Cox89c78132011-11-03 18:22:15 +0000668 u32 lvds;
669 int pipe;
670
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200671 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
672 if (!gma_encoder) {
673 dev_err(dev->dev, "gma_encoder allocation error\n");
Alan Cox89c78132011-11-03 18:22:15 +0000674 return;
675 }
676
Patrik Jakobssona3d5d752013-07-22 17:05:25 +0200677 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
678 if (!gma_connector) {
679 dev_err(dev->dev, "gma_connector allocation error\n");
Jesper Juhlaa7c62a2012-03-08 16:00:58 +0000680 goto failed_encoder;
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000681 }
682
683 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
684 if (!lvds_priv) {
685 dev_err(dev->dev, "LVDS private allocation error\n");
686 goto failed_connector;
687 }
688
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200689 gma_encoder->dev_priv = lvds_priv;
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000690
Patrik Jakobssona3d5d752013-07-22 17:05:25 +0200691 connector = &gma_connector->base;
Daniel Vetterd56f57a2015-12-04 09:45:53 +0100692 gma_connector->save = psb_intel_lvds_save;
693 gma_connector->restore = psb_intel_lvds_restore;
694
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200695 encoder = &gma_encoder->base;
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000696 drm_connector_init(dev, connector,
Alan Cox89c78132011-11-03 18:22:15 +0000697 &psb_intel_lvds_connector_funcs,
698 DRM_MODE_CONNECTOR_LVDS);
699
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000700 drm_encoder_init(dev, encoder,
Alan Cox89c78132011-11-03 18:22:15 +0000701 &psb_intel_lvds_enc_funcs,
Ville Syrjälä13a3d912015-12-09 16:20:18 +0200702 DRM_MODE_ENCODER_LVDS, NULL);
Alan Cox89c78132011-11-03 18:22:15 +0000703
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200704 gma_connector_attach_encoder(gma_connector, gma_encoder);
705 gma_encoder->type = INTEL_OUTPUT_LVDS;
Alan Cox89c78132011-11-03 18:22:15 +0000706
707 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
708 drm_connector_helper_add(connector,
709 &psb_intel_lvds_connector_helper_funcs);
710 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
711 connector->interlace_allowed = false;
712 connector->doublescan_allowed = false;
713
714 /*Attach connector properties*/
Rob Clarka69ac9e2012-10-11 20:38:23 -0500715 drm_object_attach_property(&connector->base,
Alan Cox89c78132011-11-03 18:22:15 +0000716 dev->mode_config.scaling_mode_property,
717 DRM_MODE_SCALE_FULLSCREEN);
Rob Clarka69ac9e2012-10-11 20:38:23 -0500718 drm_object_attach_property(&connector->base,
Alan Cox89c78132011-11-03 18:22:15 +0000719 dev_priv->backlight_property,
720 BRIGHTNESS_MAX_LEVEL);
721
722 /*
723 * Set up I2C bus
724 * FIXME: distroy i2c_bus when exit
725 */
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000726 lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B");
727 if (!lvds_priv->i2c_bus) {
Alan Cox89c78132011-11-03 18:22:15 +0000728 dev_printk(KERN_ERR,
729 &dev->pdev->dev, "I2C bus registration failed.\n");
730 goto failed_blc_i2c;
731 }
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000732 lvds_priv->i2c_bus->slave_addr = 0x2C;
733 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus;
Alan Cox89c78132011-11-03 18:22:15 +0000734
735 /*
736 * LVDS discovery:
737 * 1) check for EDID on DDC
738 * 2) check for VBT data
739 * 3) check to see if LVDS is already on
740 * if none of the above, no panel
741 * 4) make sure lid is open
742 * if closed, act like it's not there for now
743 */
744
745 /* Set up the DDC bus. */
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000746 lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
747 if (!lvds_priv->ddc_bus) {
Alan Cox89c78132011-11-03 18:22:15 +0000748 dev_printk(KERN_ERR, &dev->pdev->dev,
749 "DDC bus registration " "failed.\n");
750 goto failed_ddc;
751 }
752
753 /*
754 * Attempt to get the fixed panel mode from DDC. Assume that the
755 * preferred mode is the right one.
756 */
Daniel Vetterc46145a2014-03-21 23:22:36 +0100757 mutex_lock(&dev->mode_config.mutex);
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000758 psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter);
Alan Cox89c78132011-11-03 18:22:15 +0000759 list_for_each_entry(scan, &connector->probed_modes, head) {
760 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
761 mode_dev->panel_fixed_mode =
762 drm_mode_duplicate(dev, scan);
763 goto out; /* FIXME: check for quirks */
764 }
765 }
766
767 /* Failed to get EDID, what about VBT? do we need this? */
768 if (mode_dev->vbt_mode)
769 mode_dev->panel_fixed_mode =
770 drm_mode_duplicate(dev, mode_dev->vbt_mode);
771
772 if (!mode_dev->panel_fixed_mode)
773 if (dev_priv->lfp_lvds_vbt_mode)
774 mode_dev->panel_fixed_mode =
775 drm_mode_duplicate(dev,
776 dev_priv->lfp_lvds_vbt_mode);
777
778 /*
779 * If we didn't get EDID, try checking if the panel is already turned
780 * on. If so, assume that whatever is currently programmed is the
781 * correct mode.
782 */
783 lvds = REG_READ(LVDS);
784 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
785 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
786
787 if (crtc && (lvds & LVDS_PORT_EN)) {
788 mode_dev->panel_fixed_mode =
789 psb_intel_crtc_mode_get(dev, crtc);
790 if (mode_dev->panel_fixed_mode) {
791 mode_dev->panel_fixed_mode->type |=
792 DRM_MODE_TYPE_PREFERRED;
793 goto out; /* FIXME: check for quirks */
794 }
795 }
796
797 /* If we still don't have a mode after all that, give up. */
798 if (!mode_dev->panel_fixed_mode) {
799 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");
800 goto failed_find;
801 }
802
803 /*
804 * Blacklist machines with BIOSes that list an LVDS panel without
805 * actually having one.
806 */
807out:
Daniel Vetterc46145a2014-03-21 23:22:36 +0100808 mutex_unlock(&dev->mode_config.mutex);
Thomas Wood34ea3d32014-05-29 16:57:41 +0100809 drm_connector_register(connector);
Alan Cox89c78132011-11-03 18:22:15 +0000810 return;
811
812failed_find:
Daniel Vetterc46145a2014-03-21 23:22:36 +0100813 mutex_unlock(&dev->mode_config.mutex);
Markus Elfring44fb4b82016-07-22 10:30:30 +0200814 psb_intel_i2c_destroy(lvds_priv->ddc_bus);
Alan Cox89c78132011-11-03 18:22:15 +0000815failed_ddc:
Markus Elfring44fb4b82016-07-22 10:30:30 +0200816 psb_intel_i2c_destroy(lvds_priv->i2c_bus);
Alan Cox89c78132011-11-03 18:22:15 +0000817failed_blc_i2c:
818 drm_encoder_cleanup(encoder);
819 drm_connector_cleanup(connector);
Patrik Jakobsson9c8cee42011-12-19 21:40:45 +0000820failed_connector:
Patrik Jakobssona3d5d752013-07-22 17:05:25 +0200821 kfree(gma_connector);
Jesper Juhlaa7c62a2012-03-08 16:00:58 +0000822failed_encoder:
Patrik Jakobsson367e4402013-07-22 17:45:26 +0200823 kfree(gma_encoder);
Alan Cox89c78132011-11-03 18:22:15 +0000824}
825