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>
30 * $FreeBSD: src/sys/dev/drm2/i915/intel_panel.c,v 1.1 2012/05/22 11:07:44 kib Exp $
33 #include <dev/drm/drmP.h>
34 #include <dev/drm/drm.h>
36 #include "intel_drv.h"
38 #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
41 intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
42 struct drm_display_mode *adjusted_mode)
44 adjusted_mode->hdisplay = fixed_mode->hdisplay;
45 adjusted_mode->hsync_start = fixed_mode->hsync_start;
46 adjusted_mode->hsync_end = fixed_mode->hsync_end;
47 adjusted_mode->htotal = fixed_mode->htotal;
49 adjusted_mode->vdisplay = fixed_mode->vdisplay;
50 adjusted_mode->vsync_start = fixed_mode->vsync_start;
51 adjusted_mode->vsync_end = fixed_mode->vsync_end;
52 adjusted_mode->vtotal = fixed_mode->vtotal;
54 adjusted_mode->clock = fixed_mode->clock;
57 /* adjusted_mode has been preset to be the panel's fixed mode */
59 intel_pch_panel_fitting(struct drm_device *dev,
61 struct drm_display_mode *mode,
62 struct drm_display_mode *adjusted_mode)
64 struct drm_i915_private *dev_priv = dev->dev_private;
65 int x, y, width, height;
67 x = y = width = height = 0;
69 /* Native modes don't need fitting */
70 if (adjusted_mode->hdisplay == mode->hdisplay &&
71 adjusted_mode->vdisplay == mode->vdisplay)
74 switch (fitting_mode) {
75 case DRM_MODE_SCALE_CENTER:
76 width = mode->hdisplay;
77 height = mode->vdisplay;
78 x = (adjusted_mode->hdisplay - width + 1)/2;
79 y = (adjusted_mode->vdisplay - height + 1)/2;
82 case DRM_MODE_SCALE_ASPECT:
83 /* Scale but preserve the aspect ratio */
85 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
86 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
87 if (scaled_width > scaled_height) { /* pillar */
88 width = scaled_height / mode->vdisplay;
91 x = (adjusted_mode->hdisplay - width + 1) / 2;
93 height = adjusted_mode->vdisplay;
94 } else if (scaled_width < scaled_height) { /* letter */
95 height = scaled_width / mode->hdisplay;
98 y = (adjusted_mode->vdisplay - height + 1) / 2;
100 width = adjusted_mode->hdisplay;
103 width = adjusted_mode->hdisplay;
104 height = adjusted_mode->vdisplay;
110 case DRM_MODE_SCALE_FULLSCREEN:
112 width = adjusted_mode->hdisplay;
113 height = adjusted_mode->vdisplay;
118 dev_priv->pch_pf_pos = (x << 16) | y;
119 dev_priv->pch_pf_size = (width << 16) | height;
122 static int is_backlight_combination_mode(struct drm_device *dev)
124 struct drm_i915_private *dev_priv = dev->dev_private;
126 if (INTEL_INFO(dev)->gen >= 4)
127 return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE;
130 return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE;
135 static u32 i915_read_blc_pwm_ctl(struct drm_i915_private *dev_priv)
139 /* Restore the CTL value if it lost, e.g. GPU reset */
141 if (HAS_PCH_SPLIT(dev_priv->dev)) {
142 val = I915_READ(BLC_PWM_PCH_CTL2);
143 if (dev_priv->saveBLC_PWM_CTL2 == 0) {
144 dev_priv->saveBLC_PWM_CTL2 = val;
145 } else if (val == 0) {
146 I915_WRITE(BLC_PWM_PCH_CTL2,
147 dev_priv->saveBLC_PWM_CTL2);
148 val = dev_priv->saveBLC_PWM_CTL2;
151 val = I915_READ(BLC_PWM_CTL);
152 if (dev_priv->saveBLC_PWM_CTL == 0) {
153 dev_priv->saveBLC_PWM_CTL = val;
154 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
155 } else if (val == 0) {
156 I915_WRITE(BLC_PWM_CTL,
157 dev_priv->saveBLC_PWM_CTL);
158 I915_WRITE(BLC_PWM_CTL2,
159 dev_priv->saveBLC_PWM_CTL2);
160 val = dev_priv->saveBLC_PWM_CTL;
167 u32 intel_panel_get_max_backlight(struct drm_device *dev)
169 struct drm_i915_private *dev_priv = dev->dev_private;
172 max = i915_read_blc_pwm_ctl(dev_priv);
174 /* XXX add code here to query mode clock or hardware clock
175 * and program max PWM appropriately.
178 printf("fixme: max PWM is zero.\n");
183 if (HAS_PCH_SPLIT(dev)) {
186 if (INTEL_INFO(dev)->gen < 4)
191 if (is_backlight_combination_mode(dev))
195 DRM_DEBUG("max backlight PWM = %d\n", max);
199 u32 intel_panel_get_backlight(struct drm_device *dev)
201 struct drm_i915_private *dev_priv = dev->dev_private;
204 if (HAS_PCH_SPLIT(dev)) {
205 val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
207 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
208 if (INTEL_INFO(dev)->gen < 4)
211 if (is_backlight_combination_mode(dev)) {
214 lbpc = pci_read_config(dev->device, PCI_LBPC, 1);
219 DRM_DEBUG("get backlight PWM = %d\n", val);
223 static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
225 struct drm_i915_private *dev_priv = dev->dev_private;
226 u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
227 I915_WRITE(BLC_PWM_CPU_CTL, val | level);
230 static void intel_panel_actually_set_backlight(struct drm_device *dev, u32 level)
232 struct drm_i915_private *dev_priv = dev->dev_private;
235 DRM_DEBUG("set backlight PWM = %d\n", level);
237 if (HAS_PCH_SPLIT(dev))
238 return intel_pch_panel_set_backlight(dev, level);
240 if (is_backlight_combination_mode(dev)) {
241 u32 max = intel_panel_get_max_backlight(dev);
244 lbpc = level * 0xfe / max + 1;
246 pci_write_config(dev->device, PCI_LBPC, lbpc, 4);
249 tmp = I915_READ(BLC_PWM_CTL);
250 if (INTEL_INFO(dev)->gen < 4)
252 tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
253 I915_WRITE(BLC_PWM_CTL, tmp | level);
256 void intel_panel_set_backlight(struct drm_device *dev, u32 level)
258 struct drm_i915_private *dev_priv = dev->dev_private;
260 dev_priv->backlight_level = level;
261 if (dev_priv->backlight_enabled)
262 intel_panel_actually_set_backlight(dev, level);
265 void intel_panel_disable_backlight(struct drm_device *dev)
267 struct drm_i915_private *dev_priv = dev->dev_private;
269 dev_priv->backlight_enabled = false;
270 intel_panel_actually_set_backlight(dev, 0);
273 void intel_panel_enable_backlight(struct drm_device *dev)
275 struct drm_i915_private *dev_priv = dev->dev_private;
277 if (dev_priv->backlight_level == 0)
278 dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
280 dev_priv->backlight_enabled = true;
281 intel_panel_actually_set_backlight(dev, dev_priv->backlight_level);
284 static void intel_panel_init_backlight(struct drm_device *dev)
286 struct drm_i915_private *dev_priv = dev->dev_private;
288 dev_priv->backlight_level = intel_panel_get_backlight(dev);
289 dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
292 enum drm_connector_status
293 intel_panel_detect(struct drm_device *dev)
296 struct drm_i915_private *dev_priv = dev->dev_private;
299 if (i915_panel_ignore_lid)
300 return i915_panel_ignore_lid > 0 ?
301 connector_status_connected :
302 connector_status_disconnected;
304 /* opregion lid state on HP 2540p is wrong at boot up,
305 * appears to be either the BIOS or Linux ACPI fault */
307 /* Assume that the BIOS does not lie through the OpRegion... */
308 if (dev_priv->opregion.lid_state)
309 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
310 connector_status_connected :
311 connector_status_disconnected;
314 return connector_status_unknown;
317 int intel_panel_setup_backlight(struct drm_device *dev)
319 intel_panel_init_backlight(dev);
323 void intel_panel_destroy_backlight(struct drm_device *dev)