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>
30 #include <drm/drm_crtc.h>
31 #include <drm/drm_crtc_helper.h>
32 #include <drm/amdgpu_drm.h>
36 #include <drm/drm_fb_helper.h>
38 #include <linux/vga_switcheroo.h>
41 this contains a helper + a amdgpu fb
42 the helper contains a pointer to amdgpu framebuffer baseclass.
45 struct drm_fb_helper helper;
46 struct amdgpu_framebuffer rfb;
47 struct amdgpu_device *adev;
50 static struct fb_ops amdgpufb_ops = {
52 .fb_check_var = drm_fb_helper_check_var,
53 .fb_set_par = drm_fb_helper_set_par,
54 .fb_fillrect = drm_fb_helper_cfb_fillrect,
55 .fb_copyarea = drm_fb_helper_cfb_copyarea,
56 .fb_imageblit = drm_fb_helper_cfb_imageblit,
57 .fb_pan_display = drm_fb_helper_pan_display,
58 .fb_blank = drm_fb_helper_blank,
59 .fb_setcmap = drm_fb_helper_setcmap,
60 .fb_debug_enter = drm_fb_helper_debug_enter,
61 .fb_debug_leave = drm_fb_helper_debug_leave,
65 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled)
83 aligned += pitch_mask;
84 aligned &= ~pitch_mask;
88 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
90 struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj);
93 ret = amdgpu_bo_reserve(rbo, false);
94 if (likely(ret == 0)) {
95 amdgpu_bo_kunmap(rbo);
97 amdgpu_bo_unreserve(rbo);
99 drm_gem_object_unreference_unlocked(gobj);
102 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
103 struct drm_mode_fb_cmd2 *mode_cmd,
104 struct drm_gem_object **gobj_p)
106 struct amdgpu_device *adev = rfbdev->adev;
107 struct drm_gem_object *gobj = NULL;
108 struct amdgpu_bo *rbo = NULL;
109 bool fb_tiled = false; /* useful for testing */
110 u32 tiling_flags = 0;
112 int aligned_size, size;
113 int height = mode_cmd->height;
116 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
118 /* need to align pitch with crtc limits */
119 mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,
120 fb_tiled) * ((bpp + 1) / 8);
122 height = ALIGN(mode_cmd->height, 8);
123 size = mode_cmd->pitches[0] * height;
124 aligned_size = ALIGN(size, PAGE_SIZE);
125 ret = amdgpu_gem_object_create(adev, aligned_size, 0,
126 AMDGPU_GEM_DOMAIN_VRAM,
127 AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
130 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
134 rbo = gem_to_amdgpu_bo(gobj);
137 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
139 ret = amdgpu_bo_reserve(rbo, false);
140 if (unlikely(ret != 0))
144 ret = amdgpu_bo_set_tiling_flags(rbo,
147 dev_err(adev->dev, "FB failed to set tiling flags\n");
151 ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, 0, NULL);
153 amdgpu_bo_unreserve(rbo);
156 ret = amdgpu_bo_kmap(rbo, NULL);
157 amdgpu_bo_unreserve(rbo);
165 amdgpufb_destroy_pinned_object(gobj);
170 static int amdgpufb_create(struct drm_fb_helper *helper,
171 struct drm_fb_helper_surface_size *sizes)
173 struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
174 struct amdgpu_device *adev = rfbdev->adev;
175 struct fb_info *info;
176 struct drm_framebuffer *fb = NULL;
177 struct drm_mode_fb_cmd2 mode_cmd;
178 struct drm_gem_object *gobj = NULL;
179 struct amdgpu_bo *rbo = NULL;
183 mode_cmd.width = sizes->surface_width;
184 mode_cmd.height = sizes->surface_height;
186 if (sizes->surface_bpp == 24)
187 sizes->surface_bpp = 32;
189 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
190 sizes->surface_depth);
192 ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
194 DRM_ERROR("failed to create fbcon object %d\n", ret);
198 rbo = gem_to_amdgpu_bo(gobj);
200 /* okay we have an object now allocate the framebuffer */
201 info = drm_fb_helper_alloc_fbi(helper);
208 info->skip_vt_switch = true;
210 ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
212 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
213 goto out_destroy_fbi;
216 fb = &rfbdev->rfb.base;
219 rfbdev->helper.fb = fb;
221 memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo));
223 strcpy(info->fix.id, "amdgpudrmfb");
225 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
227 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
228 info->fbops = &amdgpufb_ops;
230 tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start;
231 info->fix.smem_start = adev->mc.aper_base + tmp;
232 info->fix.smem_len = amdgpu_bo_size(rbo);
233 info->screen_base = rbo->kptr;
234 info->screen_size = amdgpu_bo_size(rbo);
236 drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
238 /* setup aperture base/size for vesafb takeover */
239 info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
240 info->apertures->ranges[0].size = adev->mc.aper_size;
242 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
244 if (info->screen_base == NULL) {
246 goto out_destroy_fbi;
249 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
250 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)adev->mc.aper_base);
251 DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo));
252 DRM_INFO("fb depth is %d\n", fb->depth);
253 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
255 vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
259 drm_fb_helper_release_fbi(helper);
265 drm_gem_object_unreference_unlocked(gobj);
266 drm_framebuffer_unregister_private(fb);
267 drm_framebuffer_cleanup(fb);
273 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
275 if (adev->mode_info.rfbdev)
276 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
279 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
281 struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
283 drm_fb_helper_unregister_fbi(&rfbdev->helper);
284 drm_fb_helper_release_fbi(&rfbdev->helper);
287 amdgpufb_destroy_pinned_object(rfb->obj);
290 drm_fb_helper_fini(&rfbdev->helper);
291 drm_framebuffer_unregister_private(&rfb->base);
292 drm_framebuffer_cleanup(&rfb->base);
297 /** Sets the color ramps on behalf of fbcon */
298 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
301 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
303 amdgpu_crtc->lut_r[regno] = red >> 6;
304 amdgpu_crtc->lut_g[regno] = green >> 6;
305 amdgpu_crtc->lut_b[regno] = blue >> 6;
308 /** Gets the color ramps on behalf of fbcon */
309 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
310 u16 *blue, int regno)
312 struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
314 *red = amdgpu_crtc->lut_r[regno] << 6;
315 *green = amdgpu_crtc->lut_g[regno] << 6;
316 *blue = amdgpu_crtc->lut_b[regno] << 6;
319 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
320 .gamma_set = amdgpu_crtc_fb_gamma_set,
321 .gamma_get = amdgpu_crtc_fb_gamma_get,
322 .fb_probe = amdgpufb_create,
325 int amdgpu_fbdev_init(struct amdgpu_device *adev)
327 struct amdgpu_fbdev *rfbdev;
331 /* don't init fbdev on hw without DCE */
332 if (!adev->mode_info.mode_config_initialized)
335 /* don't init fbdev if there are no connectors */
336 if (list_empty(&adev->ddev->mode_config.connector_list))
339 /* select 8 bpp console on low vram cards */
340 if (adev->mc.real_vram_size <= (32*1024*1024))
343 rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
348 adev->mode_info.rfbdev = rfbdev;
350 drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
351 &amdgpu_fb_helper_funcs);
353 ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
354 adev->mode_info.num_crtc,
355 AMDGPUFB_CONN_LIMIT);
361 drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
363 /* disable all the possible outputs/crtcs before entering KMS mode */
364 drm_helper_disable_unused_functions(adev->ddev);
366 drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
370 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
372 if (!adev->mode_info.rfbdev)
375 amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
376 kfree(adev->mode_info.rfbdev);
377 adev->mode_info.rfbdev = NULL;
380 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
382 if (adev->mode_info.rfbdev)
383 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
387 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
389 struct amdgpu_bo *robj;
392 if (!adev->mode_info.rfbdev)
395 robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
396 size += amdgpu_bo_size(robj);
400 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
402 if (!adev->mode_info.rfbdev)
404 if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
409 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
411 struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
412 struct drm_fb_helper *fb_helper;
418 fb_helper = &afbdev->helper;
420 ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
422 DRM_DEBUG("failed to restore crtc mode\n");