2 * Copyright (C) 2012 Russell King
3 * Written from the i915 driver.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 #include <linux/errno.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
14 #include <drm/drm_fb_helper.h>
15 #include "armada_crtc.h"
16 #include "armada_drm.h"
17 #include "armada_fb.h"
18 #include "armada_gem.h"
20 static /*const*/ struct fb_ops armada_fb_ops = {
22 .fb_check_var = drm_fb_helper_check_var,
23 .fb_set_par = drm_fb_helper_set_par,
24 .fb_fillrect = drm_fb_helper_cfb_fillrect,
25 .fb_copyarea = drm_fb_helper_cfb_copyarea,
26 .fb_imageblit = drm_fb_helper_cfb_imageblit,
27 .fb_pan_display = drm_fb_helper_pan_display,
28 .fb_blank = drm_fb_helper_blank,
29 .fb_setcmap = drm_fb_helper_setcmap,
30 .fb_debug_enter = drm_fb_helper_debug_enter,
31 .fb_debug_leave = drm_fb_helper_debug_leave,
34 static int armada_fb_create(struct drm_fb_helper *fbh,
35 struct drm_fb_helper_surface_size *sizes)
37 struct drm_device *dev = fbh->dev;
38 struct drm_mode_fb_cmd2 mode;
39 struct armada_framebuffer *dfb;
40 struct armada_gem_object *obj;
45 memset(&mode, 0, sizeof(mode));
46 mode.width = sizes->surface_width;
47 mode.height = sizes->surface_height;
48 mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
49 mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
50 sizes->surface_depth);
52 size = mode.pitches[0] * mode.height;
53 obj = armada_gem_alloc_private_object(dev, size);
55 DRM_ERROR("failed to allocate fb memory\n");
59 ret = armada_gem_linear_back(dev, obj);
61 drm_gem_object_unreference_unlocked(&obj->obj);
65 ptr = armada_gem_map_object(dev, obj);
67 drm_gem_object_unreference_unlocked(&obj->obj);
71 dfb = armada_framebuffer_create(dev, &mode, obj);
74 * A reference is now held by the framebuffer object if
75 * successful, otherwise this drops the ref for the error path.
77 drm_gem_object_unreference_unlocked(&obj->obj);
82 info = drm_fb_helper_alloc_fbi(fbh);
88 strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
90 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
91 info->fbops = &armada_fb_ops;
92 info->fix.smem_start = obj->phys_addr;
93 info->fix.smem_len = obj->obj.size;
94 info->screen_size = obj->obj.size;
95 info->screen_base = ptr;
98 drm_fb_helper_fill_fix(info, dfb->fb.pitches[0], dfb->fb.depth);
99 drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);
101 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
102 dfb->fb.width, dfb->fb.height, dfb->fb.bits_per_pixel,
103 (unsigned long long)obj->phys_addr);
108 dfb->fb.funcs->destroy(&dfb->fb);
112 static int armada_fb_probe(struct drm_fb_helper *fbh,
113 struct drm_fb_helper_surface_size *sizes)
118 ret = armada_fb_create(fbh, sizes);
125 static const struct drm_fb_helper_funcs armada_fb_helper_funcs = {
126 .gamma_set = armada_drm_crtc_gamma_set,
127 .gamma_get = armada_drm_crtc_gamma_get,
128 .fb_probe = armada_fb_probe,
131 int armada_fbdev_init(struct drm_device *dev)
133 struct armada_private *priv = dev->dev_private;
134 struct drm_fb_helper *fbh;
137 fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
143 drm_fb_helper_prepare(dev, fbh, &armada_fb_helper_funcs);
145 ret = drm_fb_helper_init(dev, fbh, 1, 1);
147 DRM_ERROR("failed to initialize drm fb helper\n");
151 ret = drm_fb_helper_single_add_all_connectors(fbh);
153 DRM_ERROR("failed to add fb connectors\n");
157 ret = drm_fb_helper_initial_config(fbh, 32);
159 DRM_ERROR("failed to set initial config\n");
165 drm_fb_helper_release_fbi(fbh);
166 drm_fb_helper_fini(fbh);
172 void armada_fbdev_lastclose(struct drm_device *dev)
174 struct armada_private *priv = dev->dev_private;
177 drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
180 void armada_fbdev_fini(struct drm_device *dev)
182 struct armada_private *priv = dev->dev_private;
183 struct drm_fb_helper *fbh = priv->fbdev;
186 drm_fb_helper_unregister_fbi(fbh);
187 drm_fb_helper_release_fbi(fbh);
189 drm_fb_helper_fini(fbh);
192 fbh->fb->funcs->destroy(fbh->fb);