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_framebuffer *fb;
66 struct drm_device *dev = helper->dev;
67 struct drm_mode_fb_cmd2 mode_cmd = {};
68 struct drm_i915_gem_object *obj;
71 /* we don't do packed 24bpp */
72 if (sizes->surface_bpp == 24)
73 sizes->surface_bpp = 32;
75 mode_cmd.width = sizes->surface_width;
76 mode_cmd.height = sizes->surface_height;
78 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
79 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
80 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
81 sizes->surface_depth);
83 size = mode_cmd.pitches[0] * mode_cmd.height;
84 size = ALIGN(size, PAGE_SIZE);
85 obj = i915_gem_object_create_stolen(dev, size);
87 obj = i915_gem_alloc_object(dev, size);
89 DRM_ERROR("failed to allocate framebuffer\n");
94 /* Flush everything out, we'll be doing GTT only from now on */
95 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
97 DRM_ERROR("failed to pin obj: %d\n", ret);
101 fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
107 ifbdev->fb = to_intel_framebuffer(fb);
112 i915_gem_object_ggtt_unpin(obj);
114 drm_gem_object_unreference(&obj->base);
119 static int intelfb_create(struct drm_fb_helper *helper,
120 struct drm_fb_helper_surface_size *sizes)
122 struct intel_fbdev *ifbdev =
123 container_of(helper, struct intel_fbdev, helper);
124 struct intel_framebuffer *intel_fb = ifbdev->fb;
125 struct drm_device *dev = helper->dev;
126 struct drm_i915_private *dev_priv = dev->dev_private;
127 struct fb_info *info;
128 struct drm_framebuffer *fb;
129 struct drm_i915_gem_object *obj;
132 mutex_lock(&dev->struct_mutex);
134 if (!intel_fb || WARN_ON(!intel_fb->obj)) {
135 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
136 ret = intelfb_alloc(helper, sizes);
139 intel_fb = ifbdev->fb;
141 DRM_DEBUG_KMS("re-using BIOS fb\n");
142 sizes->fb_width = intel_fb->base.width;
143 sizes->fb_height = intel_fb->base.height;
147 size = obj->base.size;
149 info = framebuffer_alloc(0, &dev->pdev->dev);
157 fb = &ifbdev->fb->base;
159 ifbdev->helper.fb = fb;
160 ifbdev->helper.fbdev = info;
162 strcpy(info->fix.id, "inteldrmfb");
164 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
165 info->fbops = &intelfb_ops;
167 ret = fb_alloc_cmap(&info->cmap, 256, 0);
172 /* setup aperture base/size for vesafb takeover */
173 info->apertures = alloc_apertures(1);
174 if (!info->apertures) {
178 info->apertures->ranges[0].base = dev->mode_config.fb_base;
179 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
181 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
182 info->fix.smem_len = size;
185 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
187 if (!info->screen_base) {
191 info->screen_size = size;
193 /* This driver doesn't need a VT switch to restore the mode on resume */
194 info->skip_vt_switch = true;
196 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
197 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
199 /* If the object is shmemfs backed, it will have given us zeroed pages.
200 * If the object is stolen however, it will be full of whatever
201 * garbage was left in there.
203 if (ifbdev->fb->obj->stolen)
204 memset_io(info->screen_base, 0, info->screen_size);
206 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
208 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
209 fb->width, fb->height,
210 i915_gem_obj_ggtt_offset(obj), obj);
212 mutex_unlock(&dev->struct_mutex);
213 vga_switcheroo_client_fb_set(dev->pdev, info);
217 i915_gem_object_ggtt_unpin(obj);
218 drm_gem_object_unreference(&obj->base);
220 mutex_unlock(&dev->struct_mutex);
224 /** Sets the color ramps on behalf of RandR */
225 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
228 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
230 intel_crtc->lut_r[regno] = red >> 8;
231 intel_crtc->lut_g[regno] = green >> 8;
232 intel_crtc->lut_b[regno] = blue >> 8;
235 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
236 u16 *blue, int regno)
238 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
240 *red = intel_crtc->lut_r[regno] << 8;
241 *green = intel_crtc->lut_g[regno] << 8;
242 *blue = intel_crtc->lut_b[regno] << 8;
245 static struct drm_fb_helper_crtc *
246 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
250 for (i = 0; i < fb_helper->crtc_count; i++)
251 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
252 return &fb_helper->crtc_info[i];
258 * Try to read the BIOS display configuration and use it for the initial
261 * The BIOS or boot loader will generally create an initial display
262 * configuration for us that includes some set of active pipes and displays.
263 * This routine tries to figure out which pipes and connectors are active
264 * and stuffs them into the crtcs and modes array given to us by the
265 * drm_fb_helper code.
267 * The overall sequence is:
268 * intel_fbdev_init - from driver load
269 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
270 * drm_fb_helper_init - build fb helper structs
271 * drm_fb_helper_single_add_all_connectors - more fb helper structs
272 * intel_fbdev_initial_config - apply the config
273 * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
274 * drm_setup_crtcs - build crtc config for fbdev
275 * intel_fb_initial_config - find active connectors etc
276 * drm_fb_helper_single_fb_probe - set up fbdev
277 * intelfb_create - re-use or alloc fb, build out fbdev structs
279 * Note that we don't make special consideration whether we could actually
280 * switch to the selected modes without a full modeset. E.g. when the display
281 * is in VGA mode we need to recalculate watermarks and set a new high-res
282 * framebuffer anyway.
284 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
285 struct drm_fb_helper_crtc **crtcs,
286 struct drm_display_mode **modes,
287 bool *enabled, int width, int height)
289 struct drm_device *dev = fb_helper->dev;
292 bool any_enabled = false;
295 * If the user specified any force options, just bail here
296 * and use that config.
298 for (i = 0; i < fb_helper->connector_count; i++) {
299 struct drm_fb_helper_connector *fb_conn;
300 struct drm_connector *connector;
302 fb_conn = fb_helper->connector_info[i];
303 connector = fb_conn->connector;
308 if (connector->force != DRM_FORCE_UNSPECIFIED)
312 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
317 memcpy(save_enabled, enabled, dev->mode_config.num_connector);
319 for (i = 0; i < fb_helper->connector_count; i++) {
320 struct drm_fb_helper_connector *fb_conn;
321 struct drm_connector *connector;
322 struct drm_encoder *encoder;
323 struct drm_fb_helper_crtc *new_crtc;
325 fb_conn = fb_helper->connector_info[i];
326 connector = fb_conn->connector;
328 DRM_DEBUG_KMS("connector %d not enabled, skipping\n",
333 encoder = connector->encoder;
334 if (!encoder || WARN_ON(!encoder->crtc)) {
335 DRM_DEBUG_KMS("connector %d has no encoder or crtc, skipping\n",
341 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
344 * Make sure we're not trying to drive multiple connectors
345 * with a single CRTC, since our cloning support may not
348 for (j = 0; j < fb_helper->connector_count; j++) {
349 if (crtcs[j] == new_crtc) {
355 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
356 fb_conn->connector->base.id);
358 /* go for command line mode first */
359 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
361 /* try for preferred next */
363 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
364 fb_conn->connector->base.id);
365 modes[i] = drm_has_preferred_mode(fb_conn, width,
369 /* last resort: use current mode */
372 * IMPORTANT: We want to use the adjusted mode (i.e.
373 * after the panel fitter upscaling) as the initial
374 * config, not the input mode, which is what crtc->mode
375 * usually contains. But since our current fastboot
376 * code puts a mode derived from the post-pfit timings
377 * into crtc->mode this works out correctly. We don't
378 * use hwmode anywhere right now, so use it for this
379 * since the fb helper layer wants a pointer to
382 intel_mode_from_pipe_config(&encoder->crtc->hwmode,
383 &to_intel_crtc(encoder->crtc)->config);
384 modes[i] = &encoder->crtc->hwmode;
388 DRM_DEBUG_KMS("connector %s on crtc %d: %s\n",
389 drm_get_connector_name(connector),
390 encoder->crtc->base.id,
398 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
407 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
408 .initial_config = intel_fb_initial_config,
409 .gamma_set = intel_crtc_fb_gamma_set,
410 .gamma_get = intel_crtc_fb_gamma_get,
411 .fb_probe = intelfb_create,
414 static void intel_fbdev_destroy(struct drm_device *dev,
415 struct intel_fbdev *ifbdev)
417 if (ifbdev->helper.fbdev) {
418 struct fb_info *info = ifbdev->helper.fbdev;
420 unregister_framebuffer(info);
421 iounmap(info->screen_base);
423 fb_dealloc_cmap(&info->cmap);
425 framebuffer_release(info);
428 drm_fb_helper_fini(&ifbdev->helper);
430 drm_framebuffer_unregister_private(&ifbdev->fb->base);
431 drm_framebuffer_remove(&ifbdev->fb->base);
434 int intel_fbdev_init(struct drm_device *dev)
436 struct intel_fbdev *ifbdev;
437 struct drm_i915_private *dev_priv = dev->dev_private;
440 ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
444 dev_priv->fbdev = ifbdev;
445 ifbdev->helper.funcs = &intel_fb_helper_funcs;
447 ret = drm_fb_helper_init(dev, &ifbdev->helper,
448 INTEL_INFO(dev)->num_pipes,
455 drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
460 void intel_fbdev_initial_config(struct drm_device *dev)
462 struct drm_i915_private *dev_priv = dev->dev_private;
464 /* Due to peculiar init order wrt to hpd handling this is separate. */
465 drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
468 void intel_fbdev_fini(struct drm_device *dev)
470 struct drm_i915_private *dev_priv = dev->dev_private;
471 if (!dev_priv->fbdev)
474 intel_fbdev_destroy(dev, dev_priv->fbdev);
475 kfree(dev_priv->fbdev);
476 dev_priv->fbdev = NULL;
479 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
481 struct drm_i915_private *dev_priv = dev->dev_private;
482 struct intel_fbdev *ifbdev = dev_priv->fbdev;
483 struct fb_info *info;
488 info = ifbdev->helper.fbdev;
490 /* On resume from hibernation: If the object is shmemfs backed, it has
491 * been restored from swap. If the object is stolen however, it will be
492 * full of whatever garbage was left in there.
494 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
495 memset_io(info->screen_base, 0, info->screen_size);
497 fb_set_suspend(info, state);
500 void intel_fbdev_output_poll_changed(struct drm_device *dev)
502 struct drm_i915_private *dev_priv = dev->dev_private;
503 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
506 void intel_fbdev_restore_mode(struct drm_device *dev)
509 struct drm_i915_private *dev_priv = dev->dev_private;
511 if (INTEL_INFO(dev)->num_pipes == 0)
514 drm_modeset_lock_all(dev);
516 ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
518 DRM_DEBUG("failed to restore crtc mode\n");
520 drm_modeset_unlock_all(dev);