3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Inki Dae <inki.dae@samsung.com>
6 * Joonyoung Shim <jy0922.shim@samsung.com>
7 * Seung-Woo Kim <sw0312.kim@samsung.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
16 #include <drm/drm_crtc.h>
17 #include <drm/drm_fb_helper.h>
18 #include <drm/drm_crtc_helper.h>
19 #include <drm/exynos_drm.h>
21 #include "exynos_drm_drv.h"
22 #include "exynos_drm_fb.h"
23 #include "exynos_drm_fbdev.h"
24 #include "exynos_drm_iommu.h"
26 #define MAX_CONNECTOR 4
27 #define PREFERRED_BPP 32
29 #define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\
32 struct exynos_drm_fbdev {
33 struct drm_fb_helper drm_fb_helper;
34 struct exynos_drm_gem *exynos_gem;
37 static int exynos_drm_fb_mmap(struct fb_info *info,
38 struct vm_area_struct *vma)
40 struct drm_fb_helper *helper = info->par;
41 struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper);
42 struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
43 unsigned long vm_size;
46 vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
48 vm_size = vma->vm_end - vma->vm_start;
50 if (vm_size > exynos_gem->size)
53 ret = dma_mmap_attrs(to_dma_dev(helper->dev), vma, exynos_gem->cookie,
54 exynos_gem->dma_addr, exynos_gem->size,
55 exynos_gem->dma_attrs);
57 DRM_ERROR("failed to mmap.\n");
64 static struct fb_ops exynos_drm_fb_ops = {
66 DRM_FB_HELPER_DEFAULT_OPS,
67 .fb_mmap = exynos_drm_fb_mmap,
68 .fb_fillrect = drm_fb_helper_cfb_fillrect,
69 .fb_copyarea = drm_fb_helper_cfb_copyarea,
70 .fb_imageblit = drm_fb_helper_cfb_imageblit,
73 static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
74 struct drm_fb_helper_surface_size *sizes,
75 struct exynos_drm_gem *exynos_gem)
78 struct drm_framebuffer *fb = helper->fb;
79 unsigned int size = fb->width * fb->height * fb->format->cpp[0];
80 unsigned int nr_pages;
83 fbi = drm_fb_helper_alloc_fbi(helper);
85 DRM_ERROR("failed to allocate fb info.\n");
90 fbi->flags = FBINFO_FLAG_DEFAULT;
91 fbi->fbops = &exynos_drm_fb_ops;
93 drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth);
94 drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);
96 nr_pages = exynos_gem->size >> PAGE_SHIFT;
98 exynos_gem->kvaddr = (void __iomem *) vmap(exynos_gem->pages, nr_pages,
99 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
100 if (!exynos_gem->kvaddr) {
101 DRM_ERROR("failed to map pages to kernel space.\n");
105 offset = fbi->var.xoffset * fb->format->cpp[0];
106 offset += fbi->var.yoffset * fb->pitches[0];
108 fbi->screen_base = exynos_gem->kvaddr + offset;
109 fbi->screen_size = size;
110 fbi->fix.smem_len = size;
115 static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
116 struct drm_fb_helper_surface_size *sizes)
118 struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
119 struct exynos_drm_gem *exynos_gem;
120 struct drm_device *dev = helper->dev;
121 struct drm_mode_fb_cmd2 mode_cmd = { 0 };
125 DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
126 sizes->surface_width, sizes->surface_height,
129 mode_cmd.width = sizes->surface_width;
130 mode_cmd.height = sizes->surface_height;
131 mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3);
132 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
133 sizes->surface_depth);
135 size = mode_cmd.pitches[0] * mode_cmd.height;
137 exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size);
139 * If physically contiguous memory allocation fails and if IOMMU is
140 * supported then try to get buffer from non physically contiguous
143 if (IS_ERR(exynos_gem) && is_drm_iommu_supported(dev)) {
144 dev_warn(dev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n");
145 exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_NONCONTIG,
149 if (IS_ERR(exynos_gem))
150 return PTR_ERR(exynos_gem);
152 exynos_fbdev->exynos_gem = exynos_gem;
155 exynos_drm_framebuffer_init(dev, &mode_cmd, &exynos_gem, 1);
156 if (IS_ERR(helper->fb)) {
157 DRM_ERROR("failed to create drm framebuffer.\n");
158 ret = PTR_ERR(helper->fb);
159 goto err_destroy_gem;
162 ret = exynos_drm_fbdev_update(helper, sizes, exynos_gem);
164 goto err_destroy_framebuffer;
168 err_destroy_framebuffer:
169 drm_framebuffer_cleanup(helper->fb);
171 exynos_drm_gem_destroy(exynos_gem);
174 * if failed, all resources allocated above would be released by
175 * drm_mode_config_cleanup() when drm_load() had been called prior
176 * to any specific driver such as fimd or hdmi driver.
182 static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
183 .fb_probe = exynos_drm_fbdev_create,
186 int exynos_drm_fbdev_init(struct drm_device *dev)
188 struct exynos_drm_fbdev *fbdev;
189 struct exynos_drm_private *private = dev->dev_private;
190 struct drm_fb_helper *helper;
193 if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
196 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
200 private->fb_helper = helper = &fbdev->drm_fb_helper;
202 drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs);
204 ret = drm_fb_helper_init(dev, helper, MAX_CONNECTOR);
206 DRM_ERROR("failed to initialize drm fb helper.\n");
210 ret = drm_fb_helper_single_add_all_connectors(helper);
212 DRM_ERROR("failed to register drm_fb_helper_connector.\n");
217 ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
219 DRM_ERROR("failed to set up hw configuration.\n");
226 drm_fb_helper_fini(helper);
229 private->fb_helper = NULL;
235 static void exynos_drm_fbdev_destroy(struct drm_device *dev,
236 struct drm_fb_helper *fb_helper)
238 struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(fb_helper);
239 struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
240 struct drm_framebuffer *fb;
242 vunmap(exynos_gem->kvaddr);
244 /* release drm framebuffer and real buffer */
245 if (fb_helper->fb && fb_helper->fb->funcs) {
248 drm_framebuffer_remove(fb);
251 drm_fb_helper_unregister_fbi(fb_helper);
253 drm_fb_helper_fini(fb_helper);
256 void exynos_drm_fbdev_fini(struct drm_device *dev)
258 struct exynos_drm_private *private = dev->dev_private;
259 struct exynos_drm_fbdev *fbdev;
261 if (!private || !private->fb_helper)
264 fbdev = to_exynos_fbdev(private->fb_helper);
266 exynos_drm_fbdev_destroy(dev, private->fb_helper);
268 private->fb_helper = NULL;
271 void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
273 struct exynos_drm_private *private = dev->dev_private;
275 if (!private || !private->fb_helper)
278 drm_fb_helper_restore_fbdev_mode_unlocked(private->fb_helper);
281 void exynos_drm_output_poll_changed(struct drm_device *dev)
283 struct exynos_drm_private *private = dev->dev_private;
284 struct drm_fb_helper *fb_helper = private->fb_helper;
286 drm_fb_helper_hotplug_event(fb_helper);