2 * Copyright © 2007 David Airlie
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/errno.h>
30 #include <linux/string.h>
32 #include <linux/tty.h>
33 #include <linux/sysrq.h>
34 #include <linux/delay.h>
36 #include <linux/init.h>
37 #include <linux/vga_switcheroo.h>
40 #include <drm/drm_crtc.h>
41 #include <drm/drm_fb_helper.h>
42 #include "intel_drv.h"
43 #include <drm/i915_drm.h>
46 static struct fb_ops intelfb_ops
= {
48 .fb_check_var
= drm_fb_helper_check_var
,
49 .fb_set_par
= drm_fb_helper_set_par
,
50 .fb_fillrect
= cfb_fillrect
,
51 .fb_copyarea
= cfb_copyarea
,
52 .fb_imageblit
= cfb_imageblit
,
53 .fb_pan_display
= drm_fb_helper_pan_display
,
54 .fb_blank
= drm_fb_helper_blank
,
55 .fb_setcmap
= drm_fb_helper_setcmap
,
56 .fb_debug_enter
= drm_fb_helper_debug_enter
,
57 .fb_debug_leave
= drm_fb_helper_debug_leave
,
60 static int intelfb_alloc(struct drm_fb_helper
*helper
,
61 struct drm_fb_helper_surface_size
*sizes
)
63 struct intel_fbdev
*ifbdev
=
64 container_of(helper
, struct intel_fbdev
, helper
);
65 struct drm_device
*dev
= helper
->dev
;
66 struct drm_mode_fb_cmd2 mode_cmd
= {};
67 struct drm_i915_gem_object
*obj
;
70 /* we don't do packed 24bpp */
71 if (sizes
->surface_bpp
== 24)
72 sizes
->surface_bpp
= 32;
74 mode_cmd
.width
= sizes
->surface_width
;
75 mode_cmd
.height
= sizes
->surface_height
;
77 mode_cmd
.pitches
[0] = ALIGN(mode_cmd
.width
*
78 DIV_ROUND_UP(sizes
->surface_bpp
, 8), 64);
79 mode_cmd
.pixel_format
= drm_mode_legacy_fb_format(sizes
->surface_bpp
,
80 sizes
->surface_depth
);
82 size
= mode_cmd
.pitches
[0] * mode_cmd
.height
;
83 size
= ALIGN(size
, PAGE_SIZE
);
84 obj
= i915_gem_object_create_stolen(dev
, size
);
86 obj
= i915_gem_alloc_object(dev
, size
);
88 DRM_ERROR("failed to allocate framebuffer\n");
93 /* Flush everything out, we'll be doing GTT only from now on */
94 ret
= intel_pin_and_fence_fb_obj(dev
, obj
, NULL
);
96 DRM_ERROR("failed to pin fb: %d\n", ret
);
100 ret
= intel_framebuffer_init(dev
, &ifbdev
->ifb
, &mode_cmd
, obj
);
107 i915_gem_object_unpin(obj
);
109 drm_gem_object_unreference(&obj
->base
);
114 static int intelfb_create(struct drm_fb_helper
*helper
,
115 struct drm_fb_helper_surface_size
*sizes
)
117 struct intel_fbdev
*ifbdev
=
118 container_of(helper
, struct intel_fbdev
, helper
);
119 struct intel_framebuffer
*intel_fb
= &ifbdev
->ifb
;
120 struct drm_device
*dev
= helper
->dev
;
121 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
122 struct fb_info
*info
;
123 struct drm_framebuffer
*fb
;
124 struct drm_i915_gem_object
*obj
;
127 mutex_lock(&dev
->struct_mutex
);
129 if (!intel_fb
->obj
) {
130 DRM_ERROR("no BIOS fb, allocating a new one\n");
131 ret
= intelfb_alloc(helper
, sizes
);
135 sizes
->fb_width
= intel_fb
->base
.width
;
136 sizes
->fb_height
= intel_fb
->base
.height
;
140 size
= obj
->base
.size
;
142 info
= framebuffer_alloc(0, &dev
->pdev
->dev
);
150 fb
= &ifbdev
->ifb
.base
;
152 ifbdev
->helper
.fb
= fb
;
153 ifbdev
->helper
.fbdev
= info
;
155 strcpy(info
->fix
.id
, "inteldrmfb");
157 info
->flags
= FBINFO_DEFAULT
| FBINFO_CAN_FORCE_OUTPUT
;
158 info
->fbops
= &intelfb_ops
;
160 ret
= fb_alloc_cmap(&info
->cmap
, 256, 0);
165 /* setup aperture base/size for vesafb takeover */
166 info
->apertures
= alloc_apertures(1);
167 if (!info
->apertures
) {
171 info
->apertures
->ranges
[0].base
= dev
->mode_config
.fb_base
;
172 info
->apertures
->ranges
[0].size
= dev_priv
->gtt
.mappable_end
;
174 info
->fix
.smem_start
= dev
->mode_config
.fb_base
+ i915_gem_obj_ggtt_offset(obj
);
175 info
->fix
.smem_len
= size
;
178 ioremap_wc(dev_priv
->gtt
.mappable_base
+ i915_gem_obj_ggtt_offset(obj
),
180 if (!info
->screen_base
) {
184 info
->screen_size
= size
;
186 /* This driver doesn't need a VT switch to restore the mode on resume */
187 info
->skip_vt_switch
= true;
189 drm_fb_helper_fill_fix(info
, fb
->pitches
[0], fb
->depth
);
190 drm_fb_helper_fill_var(info
, &ifbdev
->helper
, sizes
->fb_width
, sizes
->fb_height
);
192 /* If the object is shmemfs backed, it will have given us zeroed pages.
193 * If the object is stolen however, it will be full of whatever
194 * garbage was left in there.
196 if (ifbdev
->ifb
.obj
->stolen
)
197 memset_io(info
->screen_base
, 0, info
->screen_size
);
199 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
201 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
202 fb
->width
, fb
->height
,
203 i915_gem_obj_ggtt_offset(obj
), obj
);
205 mutex_unlock(&dev
->struct_mutex
);
206 vga_switcheroo_client_fb_set(dev
->pdev
, info
);
210 i915_gem_object_unpin(obj
);
211 drm_gem_object_unreference(&obj
->base
);
213 mutex_unlock(&dev
->struct_mutex
);
217 /** Sets the color ramps on behalf of RandR */
218 static void intel_crtc_fb_gamma_set(struct drm_crtc
*crtc
, u16 red
, u16 green
,
221 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
223 intel_crtc
->lut_r
[regno
] = red
>> 8;
224 intel_crtc
->lut_g
[regno
] = green
>> 8;
225 intel_crtc
->lut_b
[regno
] = blue
>> 8;
228 static void intel_crtc_fb_gamma_get(struct drm_crtc
*crtc
, u16
*red
, u16
*green
,
229 u16
*blue
, int regno
)
231 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
233 *red
= intel_crtc
->lut_r
[regno
] << 8;
234 *green
= intel_crtc
->lut_g
[regno
] << 8;
235 *blue
= intel_crtc
->lut_b
[regno
] << 8;
238 static struct drm_fb_helper_funcs intel_fb_helper_funcs
= {
239 .gamma_set
= intel_crtc_fb_gamma_set
,
240 .gamma_get
= intel_crtc_fb_gamma_get
,
241 .fb_probe
= intelfb_create
,
244 static void intel_fbdev_destroy(struct drm_device
*dev
,
245 struct intel_fbdev
*ifbdev
)
247 if (ifbdev
->helper
.fbdev
) {
248 struct fb_info
*info
= ifbdev
->helper
.fbdev
;
250 unregister_framebuffer(info
);
251 iounmap(info
->screen_base
);
253 fb_dealloc_cmap(&info
->cmap
);
255 framebuffer_release(info
);
258 drm_fb_helper_fini(&ifbdev
->helper
);
260 drm_framebuffer_unregister_private(&ifbdev
->ifb
.base
);
261 intel_framebuffer_fini(&ifbdev
->ifb
);
264 int intel_fbdev_init(struct drm_device
*dev
)
266 struct intel_fbdev
*ifbdev
;
267 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
270 ifbdev
= kzalloc(sizeof(*ifbdev
), GFP_KERNEL
);
274 dev_priv
->fbdev
= ifbdev
;
275 ifbdev
->helper
.funcs
= &intel_fb_helper_funcs
;
277 ret
= drm_fb_helper_init(dev
, &ifbdev
->helper
,
278 INTEL_INFO(dev
)->num_pipes
,
285 drm_fb_helper_single_add_all_connectors(&ifbdev
->helper
);
290 void intel_fbdev_initial_config(struct drm_device
*dev
)
292 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
294 /* Due to peculiar init order wrt to hpd handling this is separate. */
295 drm_fb_helper_initial_config(&dev_priv
->fbdev
->helper
, 32);
298 void intel_fbdev_fini(struct drm_device
*dev
)
300 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
301 if (!dev_priv
->fbdev
)
304 intel_fbdev_destroy(dev
, dev_priv
->fbdev
);
305 kfree(dev_priv
->fbdev
);
306 dev_priv
->fbdev
= NULL
;
309 void intel_fbdev_set_suspend(struct drm_device
*dev
, int state
)
311 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
312 struct intel_fbdev
*ifbdev
= dev_priv
->fbdev
;
313 struct fb_info
*info
;
318 info
= ifbdev
->helper
.fbdev
;
320 /* On resume from hibernation: If the object is shmemfs backed, it has
321 * been restored from swap. If the object is stolen however, it will be
322 * full of whatever garbage was left in there.
324 if (state
== FBINFO_STATE_RUNNING
&& ifbdev
->ifb
.obj
->stolen
)
325 memset_io(info
->screen_base
, 0, info
->screen_size
);
327 fb_set_suspend(info
, state
);
330 MODULE_LICENSE("GPL and additional rights");
332 void intel_fbdev_output_poll_changed(struct drm_device
*dev
)
334 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
335 drm_fb_helper_hotplug_event(&dev_priv
->fbdev
->helper
);
338 void intel_fbdev_restore_mode(struct drm_device
*dev
)
341 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
343 if (INTEL_INFO(dev
)->num_pipes
== 0)
346 drm_modeset_lock_all(dev
);
348 ret
= drm_fb_helper_restore_fbdev_mode(&dev_priv
->fbdev
->helper
);
350 DRM_DEBUG("failed to restore crtc mode\n");
352 drm_modeset_unlock_all(dev
);