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>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
15 #include <drm/drm_fb_helper.h>
16 #include "armada_crtc.h"
17 #include "armada_drm.h"
18 #include "armada_fb.h"
19 #include "armada_gem.h"
21 static /*const*/ struct fb_ops armada_fb_ops = {
23 .fb_check_var = drm_fb_helper_check_var,
24 .fb_set_par = drm_fb_helper_set_par,
25 .fb_fillrect = cfb_fillrect,
26 .fb_copyarea = cfb_copyarea,
27 .fb_imageblit = cfb_imageblit,
28 .fb_pan_display = drm_fb_helper_pan_display,
29 .fb_blank = drm_fb_helper_blank,
30 .fb_setcmap = drm_fb_helper_setcmap,
31 .fb_debug_enter = drm_fb_helper_debug_enter,
32 .fb_debug_leave = drm_fb_helper_debug_leave,
35 static int armada_fb_create(struct drm_fb_helper *fbh,
36 struct drm_fb_helper_surface_size *sizes)
38 struct drm_device *dev = fbh->dev;
39 struct drm_mode_fb_cmd2 mode;
40 struct armada_framebuffer *dfb;
41 struct armada_gem_object *obj;
46 memset(&mode, 0, sizeof(mode));
47 mode.width = sizes->surface_width;
48 mode.height = sizes->surface_height;
49 mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
50 mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
51 sizes->surface_depth);
53 size = mode.pitches[0] * mode.height;
54 obj = armada_gem_alloc_private_object(dev, size);
56 DRM_ERROR("failed to allocate fb memory\n");
60 ret = armada_gem_linear_back(dev, obj);
62 drm_gem_object_unreference_unlocked(&obj->obj);
66 ptr = armada_gem_map_object(dev, obj);
68 drm_gem_object_unreference_unlocked(&obj->obj);
72 dfb = armada_framebuffer_create(dev, &mode, obj);
75 * A reference is now held by the framebuffer object if
76 * successful, otherwise this drops the ref for the error path.
78 drm_gem_object_unreference_unlocked(&obj->obj);
83 info = framebuffer_alloc(0, dev->dev);
89 ret = fb_alloc_cmap(&info->cmap, 256, 0);
95 strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
97 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
98 info->fbops = &armada_fb_ops;
99 info->fix.smem_start = obj->phys_addr;
100 info->fix.smem_len = obj->obj.size;
101 info->screen_size = obj->obj.size;
102 info->screen_base = ptr;
105 drm_fb_helper_fill_fix(info, dfb->fb.pitches[0], dfb->fb.depth);
106 drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);
108 DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
109 dfb->fb.width, dfb->fb.height, dfb->fb.bits_per_pixel,
110 (unsigned long long)obj->phys_addr);
115 framebuffer_release(info);
117 dfb->fb.funcs->destroy(&dfb->fb);
121 static int armada_fb_probe(struct drm_fb_helper *fbh,
122 struct drm_fb_helper_surface_size *sizes)
127 ret = armada_fb_create(fbh, sizes);
134 static struct drm_fb_helper_funcs armada_fb_helper_funcs = {
135 .gamma_set = armada_drm_crtc_gamma_set,
136 .gamma_get = armada_drm_crtc_gamma_get,
137 .fb_probe = armada_fb_probe,
140 int armada_fbdev_init(struct drm_device *dev)
142 struct armada_private *priv = dev->dev_private;
143 struct drm_fb_helper *fbh;
146 fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
152 fbh->funcs = &armada_fb_helper_funcs;
154 ret = drm_fb_helper_init(dev, fbh, 1, 1);
156 DRM_ERROR("failed to initialize drm fb helper\n");
160 ret = drm_fb_helper_single_add_all_connectors(fbh);
162 DRM_ERROR("failed to add fb connectors\n");
166 ret = drm_fb_helper_initial_config(fbh, 32);
168 DRM_ERROR("failed to set initial config\n");
174 drm_fb_helper_fini(fbh);
180 void armada_fbdev_lastclose(struct drm_device *dev)
182 struct armada_private *priv = dev->dev_private;
184 drm_modeset_lock_all(dev);
186 drm_fb_helper_restore_fbdev_mode(priv->fbdev);
187 drm_modeset_unlock_all(dev);
190 void armada_fbdev_fini(struct drm_device *dev)
192 struct armada_private *priv = dev->dev_private;
193 struct drm_fb_helper *fbh = priv->fbdev;
196 struct fb_info *info = fbh->fbdev;
199 unregister_framebuffer(info);
201 fb_dealloc_cmap(&info->cmap);
202 framebuffer_release(info);
205 drm_fb_helper_fini(fbh);
208 fbh->fb->funcs->destroy(fbh->fb);