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/slab.h>
34 #include <linux/sysrq.h>
35 #include <linux/delay.h>
37 #include <linux/init.h>
42 #include "drm_fb_helper.h"
43 #include "intel_drv.h"
48 struct drm_fb_helper helper;
49 struct intel_framebuffer *intel_fb;
50 struct drm_display_mode *our_mode;
53 static struct fb_ops intelfb_ops = {
55 .fb_check_var = drm_fb_helper_check_var,
56 .fb_set_par = drm_fb_helper_set_par,
57 .fb_setcolreg = drm_fb_helper_setcolreg,
58 .fb_fillrect = cfb_fillrect,
59 .fb_copyarea = cfb_copyarea,
60 .fb_imageblit = cfb_imageblit,
61 .fb_pan_display = drm_fb_helper_pan_display,
62 .fb_blank = drm_fb_helper_blank,
65 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
66 .gamma_set = intel_crtc_fb_gamma_set,
71 * Curretly it is assumed that the old framebuffer is reused.
74 * caller should hold the mode config lock.
77 int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
80 struct drm_framebuffer *fb;
81 struct drm_display_mode *mode = crtc->desired_mode;
94 info->var.xres = mode->hdisplay;
95 info->var.right_margin = mode->hsync_start - mode->hdisplay;
96 info->var.hsync_len = mode->hsync_end - mode->hsync_start;
97 info->var.left_margin = mode->htotal - mode->hsync_end;
98 info->var.yres = mode->vdisplay;
99 info->var.lower_margin = mode->vsync_start - mode->vdisplay;
100 info->var.vsync_len = mode->vsync_end - mode->vsync_start;
101 info->var.upper_margin = mode->vtotal - mode->vsync_end;
102 info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
104 info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
108 EXPORT_SYMBOL(intelfb_resize);
110 static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
111 uint32_t fb_height, uint32_t surface_width,
112 uint32_t surface_height,
113 struct drm_framebuffer **fb_p)
115 struct fb_info *info;
116 struct intelfb_par *par;
117 struct drm_framebuffer *fb;
118 struct intel_framebuffer *intel_fb;
119 struct drm_mode_fb_cmd mode_cmd;
120 struct drm_gem_object *fbo = NULL;
121 struct drm_i915_gem_object *obj_priv;
122 struct device *device = &dev->pdev->dev;
123 int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
125 mode_cmd.width = surface_width;
126 mode_cmd.height = surface_height;
129 mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
132 size = mode_cmd.pitch * mode_cmd.height;
133 size = ALIGN(size, PAGE_SIZE);
134 fbo = drm_gem_object_alloc(dev, size);
136 DRM_ERROR("failed to allocate framebuffer\n");
140 obj_priv = fbo->driver_private;
142 mutex_lock(&dev->struct_mutex);
144 ret = i915_gem_object_pin(fbo, PAGE_SIZE);
146 DRM_ERROR("failed to pin fb: %d\n", ret);
150 /* Flush everything out, we'll be doing GTT only from now on */
151 i915_gem_object_set_to_gtt_domain(fbo, 1);
153 ret = intel_framebuffer_create(dev, &mode_cmd, &fb, fbo);
155 DRM_ERROR("failed to allocate fb.\n");
159 list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
161 intel_fb = to_intel_framebuffer(fb);
164 info = framebuffer_alloc(sizeof(struct intelfb_par), device);
172 par->helper.funcs = &intel_fb_helper_funcs;
173 par->helper.dev = dev;
174 ret = drm_fb_helper_init_crtc_count(&par->helper, 2,
179 strcpy(info->fix.id, "inteldrmfb");
181 info->flags = FBINFO_DEFAULT;
183 info->fbops = &intelfb_ops;
186 /* setup aperture base/size for vesafb takeover */
187 info->aperture_base = dev->mode_config.fb_base;
189 info->aperture_size = pci_resource_len(dev->pdev, 2);
191 info->aperture_size = pci_resource_len(dev->pdev, 0);
193 info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
194 info->fix.smem_len = size;
196 info->flags = FBINFO_DEFAULT;
198 info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
200 if (!info->screen_base) {
204 info->screen_size = size;
206 // memset(info->screen_base, 0, size);
208 drm_fb_helper_fill_fix(info, fb->depth);
209 drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
211 /* FIXME: we really shouldn't expose mmio space at all */
212 info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
213 info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
215 info->pixmap.size = 64*1024;
216 info->pixmap.buf_align = 8;
217 info->pixmap.access_align = 32;
218 info->pixmap.flags = FB_PIXMAP_SYSTEM;
219 info->pixmap.scan_align = 1;
223 par->intel_fb = intel_fb;
225 /* To allow resizeing without swapping buffers */
226 DRM_DEBUG("allocated %dx%d fb: 0x%08x, bo %p\n", intel_fb->base.width,
227 intel_fb->base.height, obj_priv->gtt_offset, fbo);
229 mutex_unlock(&dev->struct_mutex);
233 i915_gem_object_unpin(fbo);
235 drm_gem_object_unreference(fbo);
236 mutex_unlock(&dev->struct_mutex);
241 int intelfb_probe(struct drm_device *dev)
246 ret = drm_fb_helper_single_fb_probe(dev, intelfb_create);
249 EXPORT_SYMBOL(intelfb_probe);
251 int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
253 struct fb_info *info;
261 struct intelfb_par *par = info->par;
262 unregister_framebuffer(info);
263 iounmap(info->screen_base);
265 drm_fb_helper_free(&par->helper);
266 framebuffer_release(info);
271 EXPORT_SYMBOL(intelfb_remove);
272 MODULE_LICENSE("GPL and additional rights");