2 * Copyright © 2006-2010 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
28 * Chris Wilson <chris@chris-wilson.co.uk>
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36 #include <dev/drm2/drmP.h>
37 #include <dev/drm2/i915/intel_drv.h>
39 #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
42 intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
43 struct drm_display_mode *adjusted_mode)
45 adjusted_mode->hdisplay = fixed_mode->hdisplay;
46 adjusted_mode->hsync_start = fixed_mode->hsync_start;
47 adjusted_mode->hsync_end = fixed_mode->hsync_end;
48 adjusted_mode->htotal = fixed_mode->htotal;
50 adjusted_mode->vdisplay = fixed_mode->vdisplay;
51 adjusted_mode->vsync_start = fixed_mode->vsync_start;
52 adjusted_mode->vsync_end = fixed_mode->vsync_end;
53 adjusted_mode->vtotal = fixed_mode->vtotal;
55 adjusted_mode->clock = fixed_mode->clock;
58 /* adjusted_mode has been preset to be the panel's fixed mode */
60 intel_pch_panel_fitting(struct drm_device *dev,
62 const struct drm_display_mode *mode,
63 struct drm_display_mode *adjusted_mode)
65 struct drm_i915_private *dev_priv = dev->dev_private;
66 int x, y, width, height;
68 x = y = width = height = 0;
70 /* Native modes don't need fitting */
71 if (adjusted_mode->hdisplay == mode->hdisplay &&
72 adjusted_mode->vdisplay == mode->vdisplay)
75 switch (fitting_mode) {
76 case DRM_MODE_SCALE_CENTER:
77 width = mode->hdisplay;
78 height = mode->vdisplay;
79 x = (adjusted_mode->hdisplay - width + 1)/2;
80 y = (adjusted_mode->vdisplay - height + 1)/2;
83 case DRM_MODE_SCALE_ASPECT:
84 /* Scale but preserve the aspect ratio */
86 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
87 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
88 if (scaled_width > scaled_height) { /* pillar */
89 width = scaled_height / mode->vdisplay;
92 x = (adjusted_mode->hdisplay - width + 1) / 2;
94 height = adjusted_mode->vdisplay;
95 } else if (scaled_width < scaled_height) { /* letter */
96 height = scaled_width / mode->hdisplay;
99 y = (adjusted_mode->vdisplay - height + 1) / 2;
101 width = adjusted_mode->hdisplay;
104 width = adjusted_mode->hdisplay;
105 height = adjusted_mode->vdisplay;
111 case DRM_MODE_SCALE_FULLSCREEN:
113 width = adjusted_mode->hdisplay;
114 height = adjusted_mode->vdisplay;
119 dev_priv->pch_pf_pos = (x << 16) | y;
120 dev_priv->pch_pf_size = (width << 16) | height;
123 static int is_backlight_combination_mode(struct drm_device *dev)
125 struct drm_i915_private *dev_priv = dev->dev_private;
127 if (INTEL_INFO(dev)->gen >= 4)
128 return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE;
131 return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE;
136 static u32 i915_read_blc_pwm_ctl(struct drm_device *dev)
138 struct drm_i915_private *dev_priv = dev->dev_private;
141 /* Restore the CTL value if it lost, e.g. GPU reset */
143 if (HAS_PCH_SPLIT(dev_priv->dev)) {
144 val = I915_READ(BLC_PWM_PCH_CTL2);
145 if (dev_priv->regfile.saveBLC_PWM_CTL2 == 0) {
146 dev_priv->regfile.saveBLC_PWM_CTL2 = val;
147 } else if (val == 0) {
148 val = dev_priv->regfile.saveBLC_PWM_CTL2;
149 I915_WRITE(BLC_PWM_PCH_CTL2, val);
152 val = I915_READ(BLC_PWM_CTL);
153 if (dev_priv->regfile.saveBLC_PWM_CTL == 0) {
154 dev_priv->regfile.saveBLC_PWM_CTL = val;
155 if (INTEL_INFO(dev)->gen >= 4)
156 dev_priv->regfile.saveBLC_PWM_CTL2 =
157 I915_READ(BLC_PWM_CTL2);
158 } else if (val == 0) {
159 val = dev_priv->regfile.saveBLC_PWM_CTL;
160 I915_WRITE(BLC_PWM_CTL, val);
161 if (INTEL_INFO(dev)->gen >= 4)
162 I915_WRITE(BLC_PWM_CTL2,
163 dev_priv->regfile.saveBLC_PWM_CTL2);
170 static u32 _intel_panel_get_max_backlight(struct drm_device *dev)
174 max = i915_read_blc_pwm_ctl(dev);
176 if (HAS_PCH_SPLIT(dev)) {
179 if (INTEL_INFO(dev)->gen < 4)
184 if (is_backlight_combination_mode(dev))
191 u32 intel_panel_get_max_backlight(struct drm_device *dev)
195 max = _intel_panel_get_max_backlight(dev);
197 /* XXX add code here to query mode clock or hardware clock
198 * and program max PWM appropriately.
200 pr_warn_once("fixme: max PWM is zero\n");
204 DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max);
208 static int i915_panel_invert_brightness;
209 TUNABLE_INT("drm.i915.invert_brightness", &i915_panel_invert_brightness);
210 MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness "
211 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
212 "report PCI device ID, subsystem vendor and subsystem device ID "
213 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
214 "It will then be included in an upcoming module version.");
215 module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600);
216 static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val)
218 struct drm_i915_private *dev_priv = dev->dev_private;
220 if (i915_panel_invert_brightness < 0)
223 if (i915_panel_invert_brightness > 0 ||
224 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)
225 return intel_panel_get_max_backlight(dev) - val;
230 static u32 intel_panel_get_backlight(struct drm_device *dev)
232 struct drm_i915_private *dev_priv = dev->dev_private;
235 if (HAS_PCH_SPLIT(dev)) {
236 val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
238 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
239 if (INTEL_INFO(dev)->gen < 4)
242 if (is_backlight_combination_mode(dev)) {
245 pci_read_config_byte(dev->dev, PCI_LBPC, &lbpc);
250 val = intel_panel_compute_brightness(dev, val);
251 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
255 static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
257 struct drm_i915_private *dev_priv = dev->dev_private;
258 u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
259 I915_WRITE(BLC_PWM_CPU_CTL, val | level);
262 static void intel_panel_actually_set_backlight(struct drm_device *dev, u32 level)
264 struct drm_i915_private *dev_priv = dev->dev_private;
267 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
268 level = intel_panel_compute_brightness(dev, level);
270 if (HAS_PCH_SPLIT(dev))
271 return intel_pch_panel_set_backlight(dev, level);
273 if (is_backlight_combination_mode(dev)) {
274 u32 max = intel_panel_get_max_backlight(dev);
277 lbpc = level * 0xfe / max + 1;
279 pci_write_config_byte(dev->dev, PCI_LBPC, lbpc);
282 tmp = I915_READ(BLC_PWM_CTL);
283 if (INTEL_INFO(dev)->gen < 4)
285 tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
286 I915_WRITE(BLC_PWM_CTL, tmp | level);
289 void intel_panel_set_backlight(struct drm_device *dev, u32 level)
291 struct drm_i915_private *dev_priv = dev->dev_private;
293 dev_priv->backlight_level = level;
294 if (dev_priv->backlight_enabled)
295 intel_panel_actually_set_backlight(dev, level);
298 void intel_panel_disable_backlight(struct drm_device *dev)
300 struct drm_i915_private *dev_priv = dev->dev_private;
302 dev_priv->backlight_enabled = false;
303 intel_panel_actually_set_backlight(dev, 0);
305 if (INTEL_INFO(dev)->gen >= 4) {
308 reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2;
310 I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE);
312 if (HAS_PCH_SPLIT(dev)) {
313 tmp = I915_READ(BLC_PWM_PCH_CTL1);
314 tmp &= ~BLM_PCH_PWM_ENABLE;
315 I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
320 void intel_panel_enable_backlight(struct drm_device *dev,
323 struct drm_i915_private *dev_priv = dev->dev_private;
325 if (dev_priv->backlight_level == 0)
326 dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
328 if (INTEL_INFO(dev)->gen >= 4) {
331 reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2;
334 tmp = I915_READ(reg);
336 /* Note that this can also get called through dpms changes. And
337 * we don't track the backlight dpms state, hence check whether
338 * we have to do anything first. */
339 if (tmp & BLM_PWM_ENABLE)
342 if (dev_priv->num_pipe == 3)
343 tmp &= ~BLM_PIPE_SELECT_IVB;
345 tmp &= ~BLM_PIPE_SELECT;
347 tmp |= BLM_PIPE(pipe);
348 tmp &= ~BLM_PWM_ENABLE;
350 I915_WRITE(reg, tmp);
352 I915_WRITE(reg, tmp | BLM_PWM_ENABLE);
354 if (HAS_PCH_SPLIT(dev)) {
355 tmp = I915_READ(BLC_PWM_PCH_CTL1);
356 tmp |= BLM_PCH_PWM_ENABLE;
357 tmp &= ~BLM_PCH_OVERRIDE_ENABLE;
358 I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
363 /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1.
364 * BLC_PWM_CPU_CTL may be cleared to zero automatically when these
367 dev_priv->backlight_enabled = true;
368 intel_panel_actually_set_backlight(dev, dev_priv->backlight_level);
371 static void intel_panel_init_backlight(struct drm_device *dev)
373 struct drm_i915_private *dev_priv = dev->dev_private;
375 dev_priv->backlight_level = intel_panel_get_backlight(dev);
376 dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
379 enum drm_connector_status
380 intel_panel_detect(struct drm_device *dev)
382 struct drm_i915_private *dev_priv = dev->dev_private;
384 /* Assume that the BIOS does not lie through the OpRegion... */
385 if (!i915_panel_ignore_lid && dev_priv->opregion.lid_state) {
386 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
387 connector_status_connected :
388 connector_status_disconnected;
391 switch (i915_panel_ignore_lid) {
393 return connector_status_connected;
395 return connector_status_disconnected;
397 return connector_status_unknown;
401 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
402 static int intel_panel_update_status(struct backlight_device *bd)
404 struct drm_device *dev = bl_get_data(bd);
405 intel_panel_set_backlight(dev, bd->props.brightness);
409 static int intel_panel_get_brightness(struct backlight_device *bd)
411 struct drm_device *dev = bl_get_data(bd);
412 struct drm_i915_private *dev_priv = dev->dev_private;
413 return dev_priv->backlight_level;
416 static const struct backlight_ops intel_panel_bl_ops = {
417 .update_status = intel_panel_update_status,
418 .get_brightness = intel_panel_get_brightness,
421 int intel_panel_setup_backlight(struct drm_connector *connector)
423 struct drm_device *dev = connector->dev;
424 struct drm_i915_private *dev_priv = dev->dev_private;
425 struct backlight_properties props;
427 intel_panel_init_backlight(dev);
429 if (WARN_ON(dev_priv->backlight))
432 memset(&props, 0, sizeof(props));
433 props.type = BACKLIGHT_RAW;
434 props.max_brightness = _intel_panel_get_max_backlight(dev);
435 if (props.max_brightness == 0) {
436 DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n");
439 dev_priv->backlight =
440 backlight_device_register("intel_backlight",
441 &connector->kdev, dev,
442 &intel_panel_bl_ops, &props);
444 if (IS_ERR(dev_priv->backlight)) {
445 DRM_ERROR("Failed to register backlight: %ld\n",
446 PTR_ERR(dev_priv->backlight));
447 dev_priv->backlight = NULL;
450 dev_priv->backlight->props.brightness = intel_panel_get_backlight(dev);
454 void intel_panel_destroy_backlight(struct drm_device *dev)
456 struct drm_i915_private *dev_priv = dev->dev_private;
457 if (dev_priv->backlight) {
458 backlight_device_unregister(dev_priv->backlight);
459 dev_priv->backlight = NULL;
463 int intel_panel_setup_backlight(struct drm_connector *connector)
465 intel_panel_init_backlight(connector->dev);
469 void intel_panel_destroy_backlight(struct drm_device *dev)
475 int intel_panel_init(struct intel_panel *panel,
476 struct drm_display_mode *fixed_mode)
478 panel->fixed_mode = fixed_mode;
483 void intel_panel_fini(struct intel_panel *panel)
485 struct intel_connector *intel_connector =
486 container_of(panel, struct intel_connector, panel);
488 if (panel->fixed_mode)
489 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);