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 #include <dev/drm2/drmP.h>
35 #include <dev/drm2/drm.h>
36 #include <dev/drm2/i915/i915_drm.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_i915_private *dev_priv)
140 /* Restore the CTL value if it lost, e.g. GPU reset */
142 if (HAS_PCH_SPLIT(dev_priv->dev)) {
143 val = I915_READ(BLC_PWM_PCH_CTL2);
144 if (dev_priv->saveBLC_PWM_CTL2 == 0) {
145 dev_priv->saveBLC_PWM_CTL2 = val;
146 } else if (val == 0) {
147 I915_WRITE(BLC_PWM_PCH_CTL2,
148 dev_priv->saveBLC_PWM_CTL2);
149 val = dev_priv->saveBLC_PWM_CTL2;
152 val = I915_READ(BLC_PWM_CTL);
153 if (dev_priv->saveBLC_PWM_CTL == 0) {
154 dev_priv->saveBLC_PWM_CTL = val;
155 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
156 } else if (val == 0) {
157 I915_WRITE(BLC_PWM_CTL,
158 dev_priv->saveBLC_PWM_CTL);
159 I915_WRITE(BLC_PWM_CTL2,
160 dev_priv->saveBLC_PWM_CTL2);
161 val = dev_priv->saveBLC_PWM_CTL;
168 u32 intel_panel_get_max_backlight(struct drm_device *dev)
170 struct drm_i915_private *dev_priv = dev->dev_private;
173 max = i915_read_blc_pwm_ctl(dev_priv);
175 /* XXX add code here to query mode clock or hardware clock
176 * and program max PWM appropriately.
179 printf("fixme: max PWM is zero.\n");
184 if (HAS_PCH_SPLIT(dev)) {
187 if (INTEL_INFO(dev)->gen < 4)
192 if (is_backlight_combination_mode(dev))
196 DRM_DEBUG("max backlight PWM = %d\n", max);
200 u32 intel_panel_get_backlight(struct drm_device *dev)
202 struct drm_i915_private *dev_priv = dev->dev_private;
205 if (HAS_PCH_SPLIT(dev)) {
206 val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
208 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
209 if (INTEL_INFO(dev)->gen < 4)
212 if (is_backlight_combination_mode(dev)) {
215 lbpc = pci_read_config(dev->device, PCI_LBPC, 1);
220 DRM_DEBUG("get backlight PWM = %d\n", val);
224 static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
226 struct drm_i915_private *dev_priv = dev->dev_private;
227 u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
228 I915_WRITE(BLC_PWM_CPU_CTL, val | level);
231 static void intel_panel_actually_set_backlight(struct drm_device *dev, u32 level)
233 struct drm_i915_private *dev_priv = dev->dev_private;
236 DRM_DEBUG("set backlight PWM = %d\n", level);
238 if (HAS_PCH_SPLIT(dev))
239 return intel_pch_panel_set_backlight(dev, level);
241 if (is_backlight_combination_mode(dev)) {
242 u32 max = intel_panel_get_max_backlight(dev);
245 lbpc = level * 0xfe / max + 1;
247 pci_write_config(dev->device, PCI_LBPC, lbpc, 4);
250 tmp = I915_READ(BLC_PWM_CTL);
251 if (INTEL_INFO(dev)->gen < 4)
253 tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
254 I915_WRITE(BLC_PWM_CTL, tmp | level);
257 void intel_panel_set_backlight(struct drm_device *dev, u32 level)
259 struct drm_i915_private *dev_priv = dev->dev_private;
261 dev_priv->backlight_level = level;
262 if (dev_priv->backlight_enabled)
263 intel_panel_actually_set_backlight(dev, level);
266 void intel_panel_disable_backlight(struct drm_device *dev)
268 struct drm_i915_private *dev_priv = dev->dev_private;
270 dev_priv->backlight_enabled = false;
271 intel_panel_actually_set_backlight(dev, 0);
274 void intel_panel_enable_backlight(struct drm_device *dev)
276 struct drm_i915_private *dev_priv = dev->dev_private;
278 if (dev_priv->backlight_level == 0)
279 dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
281 dev_priv->backlight_enabled = true;
282 intel_panel_actually_set_backlight(dev, dev_priv->backlight_level);
285 static void intel_panel_init_backlight(struct drm_device *dev)
287 struct drm_i915_private *dev_priv = dev->dev_private;
289 dev_priv->backlight_level = intel_panel_get_backlight(dev);
290 dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
293 enum drm_connector_status
294 intel_panel_detect(struct drm_device *dev)
297 struct drm_i915_private *dev_priv = dev->dev_private;
300 if (i915_panel_ignore_lid)
301 return i915_panel_ignore_lid > 0 ?
302 connector_status_connected :
303 connector_status_disconnected;
305 /* opregion lid state on HP 2540p is wrong at boot up,
306 * appears to be either the BIOS or Linux ACPI fault */
308 /* Assume that the BIOS does not lie through the OpRegion... */
309 if (dev_priv->opregion.lid_state)
310 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
311 connector_status_connected :
312 connector_status_disconnected;
315 return connector_status_unknown;
318 int intel_panel_setup_backlight(struct drm_device *dev)
320 intel_panel_init_backlight(dev);
324 void intel_panel_destroy_backlight(struct drm_device *dev)