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.
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/pm_runtime.h>
31 #include <drm/drm_crtc.h>
32 #include <drm/drm_crtc_helper.h>
33 #include <drm/amdgpu_drm.h>
37 #include <drm/drm_fb_helper.h>
39 #include <linux/vga_switcheroo.h>
42 this contains a helper + a amdgpu fb
43 the helper contains a pointer to amdgpu framebuffer baseclass.
46 struct drm_fb_helper helper;
47 struct amdgpu_framebuffer rfb;
48 struct amdgpu_device *adev;
52 amdgpufb_open(struct fb_info *info, int user)
54 struct amdgpu_fbdev *rfbdev = info->par;
55 struct amdgpu_device *adev = rfbdev->adev;
56 int ret = pm_runtime_get_sync(adev->ddev->dev);
57 if (ret < 0 && ret != -EACCES) {
58 pm_runtime_mark_last_busy(adev->ddev->dev);
59 pm_runtime_put_autosuspend(adev->ddev->dev);
66 amdgpufb_release(struct fb_info *info, int user)
68 struct amdgpu_fbdev *rfbdev = info->par;
69 struct amdgpu_device *adev = rfbdev->adev;
71 pm_runtime_mark_last_busy(adev->ddev->dev);
72 pm_runtime_put_autosuspend(adev->ddev->dev);
76 static struct fb_ops amdgpufb_ops = {
78 .fb_open = amdgpufb_open,
79 .fb_release = amdgpufb_release,
80 .fb_check_var = drm_fb_helper_check_var,
81 .fb_set_par = drm_fb_helper_set_par,
82 .fb_fillrect = drm_fb_helper_cfb_fillrect,
83 .fb_copyarea = drm_fb_helper_cfb_copyarea,
84 .fb_imageblit = drm_fb_helper_cfb_imageblit,
85 .fb_pan_display = drm_fb_helper_pan_display,
86 .fb_blank = drm_fb_helper_blank,
87 .fb_setcmap = drm_fb_helper_setcmap,
88 .fb_debug_enter = drm_fb_helper_debug_enter,
89 .fb_debug_leave = drm_fb_helper_debug_leave,
93 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled)
111 aligned += pitch_mask;
112 aligned &= ~pitch_mask;
116 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
118 struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
121 ret = amdgpu_bo_reserve(abo, false);
122 if (likely(ret == 0)) {
123 amdgpu_bo_kunmap(abo);
124 amdgpu_bo_unpin(abo);
125 amdgpu_bo_unreserve(abo);
127 drm_gem_object_unreference_unlocked(gobj);
130 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
131 struct drm_mode_fb_cmd2 *mode_cmd,
132 struct drm_gem_object **gobj_p)
134 struct amdgpu_device *adev = rfbdev->adev;
135 struct drm_gem_object *gobj = NULL;
136 struct amdgpu_bo *abo = NULL;
137 bool fb_tiled = false; /* useful for testing */
138 u32 tiling_flags = 0;
140 int aligned_size, size;
141 int height = mode_cmd->height;
144 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
146 /* need to align pitch with crtc limits */
147 mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,
148 fb_tiled) * ((bpp + 1) / 8);
150 height = ALIGN(mode_cmd->height, 8);
151 size = mode_cmd->pitches[0] * height;
152 aligned_size = ALIGN(size, PAGE_SIZE);
153 ret = amdgpu_gem_object_create(adev, aligned_size, 0,
154 AMDGPU_GEM_DOMAIN_VRAM,
155 AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
158 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
162 abo = gem_to_amdgpu_bo(gobj);
165 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
167 ret = amdgpu_bo_reserve(abo, false);
168 if (unlikely(ret != 0))
172 ret = amdgpu_bo_set_tiling_flags(abo,
175 dev_err(adev->dev, "FB failed to set tiling flags\n");
179 ret = amdgpu_bo_pin_restricted(abo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL);
181 amdgpu_bo_unreserve(abo);
184 ret = amdgpu_bo_kmap(abo, NULL);
185 amdgpu_bo_unreserve(abo);
193 amdgpufb_destroy_pinned_object(gobj);
198 static int amdgpufb_create(struct drm_fb_helper *helper,
199 struct drm_fb_helper_surface_size *sizes)
201 struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
202 struct amdgpu_device *adev = rfbdev->adev;
203 struct fb_info *info;
204 struct drm_framebuffer *fb = NULL;
205 struct drm_mode_fb_cmd2 mode_cmd;
206 struct drm_gem_object *gobj = NULL;
207 struct amdgpu_bo *abo = NULL;
211 mode_cmd.width = sizes->surface_width;
212 mode_cmd.height = sizes->surface_height;
214 if (sizes->surface_bpp == 24)
215 sizes->surface_bpp = 32;
217 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
218 sizes->surface_depth);
220 ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
222 DRM_ERROR("failed to create fbcon object %d\n", ret);
226 abo = gem_to_amdgpu_bo(gobj);
228 /* okay we have an object now allocate the framebuffer */
229 info = drm_fb_helper_alloc_fbi(helper);
236 info->skip_vt_switch = true;
238 ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
240 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
241 goto out_destroy_fbi;
244 fb = &rfbdev->rfb.base;
247 rfbdev->helper.fb = fb;
249 memset_io(abo->kptr, 0x0, amdgpu_bo_size(abo));
251 strcpy(info->fix.id, "amdgpudrmfb");
253 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
255 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
256 info->fbops = &amdgpufb_ops;
258 tmp = amdgpu_bo_gpu_offset(abo) - adev->mc.vram_start;
259 info->fix.smem_start = adev->mc.aper_base + tmp;
260 info->fix.smem_len = amdgpu_bo_size(abo);
261 info->screen_base = abo->kptr;
262 info->screen_size = amdgpu_bo_size(abo);
264 drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
266 /* setup aperture base/size for vesafb takeover */
267 info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
268 info->apertures->ranges[0].size = adev->mc.aper_size;
270 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
272 if (info->screen_base == NULL) {
274 goto out_destroy_fbi;
277 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
278 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)adev->mc.aper_base);
279 DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(abo));
280 DRM_INFO("fb depth is %d\n", fb->depth);
281 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
283 vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
287 drm_fb_helper_release_fbi(helper);
293 drm_gem_object_unreference_unlocked(gobj);
294 drm_framebuffer_unregister_private(fb);
295 drm_framebuffer_cleanup(fb);
301 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
303 if (adev->mode_info.rfbdev)
304 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
307 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
309 struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
311 drm_fb_helper_unregister_fbi(&rfbdev->helper);
312 drm_fb_helper_release_fbi(&rfbdev->helper);
315 amdgpufb_destroy_pinned_object(rfb->obj);
318 drm_fb_helper_fini(&rfbdev->helper);
319 drm_framebuffer_unregister_private(&rfb->base);
320 drm_framebuffer_cleanup(&rfb->base);
325 /** Sets the color ramps on behalf of fbcon */
326 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
329 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
331 amdgpu_crtc->lut_r[regno] = red >> 6;
332 amdgpu_crtc->lut_g[regno] = green >> 6;
333 amdgpu_crtc->lut_b[regno] = blue >> 6;
336 /** Gets the color ramps on behalf of fbcon */
337 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
338 u16 *blue, int regno)
340 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
342 *red = amdgpu_crtc->lut_r[regno] << 6;
343 *green = amdgpu_crtc->lut_g[regno] << 6;
344 *blue = amdgpu_crtc->lut_b[regno] << 6;
347 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
348 .gamma_set = amdgpu_crtc_fb_gamma_set,
349 .gamma_get = amdgpu_crtc_fb_gamma_get,
350 .fb_probe = amdgpufb_create,
353 int amdgpu_fbdev_init(struct amdgpu_device *adev)
355 struct amdgpu_fbdev *rfbdev;
359 /* don't init fbdev on hw without DCE */
360 if (!adev->mode_info.mode_config_initialized)
363 /* don't init fbdev if there are no connectors */
364 if (list_empty(&adev->ddev->mode_config.connector_list))
367 /* select 8 bpp console on low vram cards */
368 if (adev->mc.real_vram_size <= (32*1024*1024))
371 rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
376 adev->mode_info.rfbdev = rfbdev;
378 drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
379 &amdgpu_fb_helper_funcs);
381 ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
382 adev->mode_info.num_crtc,
383 AMDGPUFB_CONN_LIMIT);
389 drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
391 /* disable all the possible outputs/crtcs before entering KMS mode */
392 drm_helper_disable_unused_functions(adev->ddev);
394 drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
398 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
400 if (!adev->mode_info.rfbdev)
403 amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
404 kfree(adev->mode_info.rfbdev);
405 adev->mode_info.rfbdev = NULL;
408 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
410 if (adev->mode_info.rfbdev)
411 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
415 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
417 struct amdgpu_bo *robj;
420 if (!adev->mode_info.rfbdev)
423 robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
424 size += amdgpu_bo_size(robj);
428 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
430 if (!adev->mode_info.rfbdev)
432 if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
437 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
439 struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
440 struct drm_fb_helper *fb_helper;
446 fb_helper = &afbdev->helper;
448 ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
450 DRM_DEBUG("failed to restore crtc mode\n");