2 * Copyright (C) 2012-2013 Avionic Design GmbH
3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
5 * Based on the KMS/FB CMA helpers
6 * Copyright (C) 2012 Analog Device Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
16 static inline struct tegra_fb
*to_tegra_fb(struct drm_framebuffer
*fb
)
18 return container_of(fb
, struct tegra_fb
, base
);
21 static inline struct tegra_fbdev
*to_tegra_fbdev(struct drm_fb_helper
*helper
)
23 return container_of(helper
, struct tegra_fbdev
, base
);
26 struct tegra_bo
*tegra_fb_get_plane(struct drm_framebuffer
*framebuffer
,
29 struct tegra_fb
*fb
= to_tegra_fb(framebuffer
);
31 if (index
>= drm_format_num_planes(framebuffer
->pixel_format
))
34 return fb
->planes
[index
];
37 bool tegra_fb_is_bottom_up(struct drm_framebuffer
*framebuffer
)
39 struct tegra_fb
*fb
= to_tegra_fb(framebuffer
);
41 if (fb
->planes
[0]->flags
& TEGRA_BO_BOTTOM_UP
)
47 bool tegra_fb_is_tiled(struct drm_framebuffer
*framebuffer
)
49 struct tegra_fb
*fb
= to_tegra_fb(framebuffer
);
51 if (fb
->planes
[0]->flags
& TEGRA_BO_TILED
)
57 static void tegra_fb_destroy(struct drm_framebuffer
*framebuffer
)
59 struct tegra_fb
*fb
= to_tegra_fb(framebuffer
);
62 for (i
= 0; i
< fb
->num_planes
; i
++) {
63 struct tegra_bo
*bo
= fb
->planes
[i
];
66 drm_gem_object_unreference_unlocked(&bo
->gem
);
69 drm_framebuffer_cleanup(framebuffer
);
74 static int tegra_fb_create_handle(struct drm_framebuffer
*framebuffer
,
75 struct drm_file
*file
, unsigned int *handle
)
77 struct tegra_fb
*fb
= to_tegra_fb(framebuffer
);
79 return drm_gem_handle_create(file
, &fb
->planes
[0]->gem
, handle
);
82 static struct drm_framebuffer_funcs tegra_fb_funcs
= {
83 .destroy
= tegra_fb_destroy
,
84 .create_handle
= tegra_fb_create_handle
,
87 static struct tegra_fb
*tegra_fb_alloc(struct drm_device
*drm
,
88 struct drm_mode_fb_cmd2
*mode_cmd
,
89 struct tegra_bo
**planes
,
90 unsigned int num_planes
)
96 fb
= kzalloc(sizeof(*fb
), GFP_KERNEL
);
98 return ERR_PTR(-ENOMEM
);
100 fb
->planes
= kzalloc(num_planes
* sizeof(*planes
), GFP_KERNEL
);
102 return ERR_PTR(-ENOMEM
);
104 fb
->num_planes
= num_planes
;
106 drm_helper_mode_fill_fb_struct(&fb
->base
, mode_cmd
);
108 for (i
= 0; i
< fb
->num_planes
; i
++)
109 fb
->planes
[i
] = planes
[i
];
111 err
= drm_framebuffer_init(drm
, &fb
->base
, &tegra_fb_funcs
);
113 dev_err(drm
->dev
, "failed to initialize framebuffer: %d\n",
123 static struct drm_framebuffer
*tegra_fb_create(struct drm_device
*drm
,
124 struct drm_file
*file
,
125 struct drm_mode_fb_cmd2
*cmd
)
127 unsigned int hsub
, vsub
, i
;
128 struct tegra_bo
*planes
[4];
129 struct drm_gem_object
*gem
;
133 hsub
= drm_format_horz_chroma_subsampling(cmd
->pixel_format
);
134 vsub
= drm_format_vert_chroma_subsampling(cmd
->pixel_format
);
136 for (i
= 0; i
< drm_format_num_planes(cmd
->pixel_format
); i
++) {
137 unsigned int width
= cmd
->width
/ (i
? hsub
: 1);
138 unsigned int height
= cmd
->height
/ (i
? vsub
: 1);
139 unsigned int size
, bpp
;
141 gem
= drm_gem_object_lookup(drm
, file
, cmd
->handles
[i
]);
147 bpp
= drm_format_plane_cpp(cmd
->pixel_format
, i
);
149 size
= (height
- 1) * cmd
->pitches
[i
] +
150 width
* bpp
+ cmd
->offsets
[i
];
152 if (gem
->size
< size
) {
157 planes
[i
] = to_tegra_bo(gem
);
160 fb
= tegra_fb_alloc(drm
, cmd
, planes
, i
);
170 drm_gem_object_unreference_unlocked(&planes
[i
]->gem
);
175 static struct fb_ops tegra_fb_ops
= {
176 .owner
= THIS_MODULE
,
177 .fb_fillrect
= sys_fillrect
,
178 .fb_copyarea
= sys_copyarea
,
179 .fb_imageblit
= sys_imageblit
,
180 .fb_check_var
= drm_fb_helper_check_var
,
181 .fb_set_par
= drm_fb_helper_set_par
,
182 .fb_blank
= drm_fb_helper_blank
,
183 .fb_pan_display
= drm_fb_helper_pan_display
,
184 .fb_setcmap
= drm_fb_helper_setcmap
,
187 static int tegra_fbdev_probe(struct drm_fb_helper
*helper
,
188 struct drm_fb_helper_surface_size
*sizes
)
190 struct tegra_fbdev
*fbdev
= to_tegra_fbdev(helper
);
191 struct drm_device
*drm
= helper
->dev
;
192 struct drm_mode_fb_cmd2 cmd
= { 0 };
193 unsigned int bytes_per_pixel
;
194 struct drm_framebuffer
*fb
;
195 unsigned long offset
;
196 struct fb_info
*info
;
201 bytes_per_pixel
= DIV_ROUND_UP(sizes
->surface_bpp
, 8);
203 cmd
.width
= sizes
->surface_width
;
204 cmd
.height
= sizes
->surface_height
;
205 cmd
.pitches
[0] = sizes
->surface_width
* bytes_per_pixel
;
206 cmd
.pixel_format
= drm_mode_legacy_fb_format(sizes
->surface_bpp
,
207 sizes
->surface_depth
);
209 size
= cmd
.pitches
[0] * cmd
.height
;
211 bo
= tegra_bo_create(drm
, size
, 0);
215 info
= framebuffer_alloc(0, drm
->dev
);
217 dev_err(drm
->dev
, "failed to allocate framebuffer info\n");
218 tegra_bo_free_object(&bo
->gem
);
222 fbdev
->fb
= tegra_fb_alloc(drm
, &cmd
, &bo
, 1);
223 if (IS_ERR(fbdev
->fb
)) {
224 dev_err(drm
->dev
, "failed to allocate DRM framebuffer\n");
225 err
= PTR_ERR(fbdev
->fb
);
229 fb
= &fbdev
->fb
->base
;
231 helper
->fbdev
= info
;
234 info
->flags
= FBINFO_FLAG_DEFAULT
;
235 info
->fbops
= &tegra_fb_ops
;
237 err
= fb_alloc_cmap(&info
->cmap
, 256, 0);
239 dev_err(drm
->dev
, "failed to allocate color map: %d\n", err
);
243 drm_fb_helper_fill_fix(info
, fb
->pitches
[0], fb
->depth
);
244 drm_fb_helper_fill_var(info
, helper
, fb
->width
, fb
->height
);
246 offset
= info
->var
.xoffset
* bytes_per_pixel
+
247 info
->var
.yoffset
* fb
->pitches
[0];
249 drm
->mode_config
.fb_base
= (resource_size_t
)bo
->paddr
;
250 info
->screen_base
= (void __iomem
*)bo
->vaddr
+ offset
;
251 info
->screen_size
= size
;
252 info
->fix
.smem_start
= (unsigned long)(bo
->paddr
+ offset
);
253 info
->fix
.smem_len
= size
;
258 drm_framebuffer_unregister_private(fb
);
259 tegra_fb_destroy(fb
);
261 framebuffer_release(info
);
265 static struct drm_fb_helper_funcs tegra_fb_helper_funcs
= {
266 .fb_probe
= tegra_fbdev_probe
,
269 static struct tegra_fbdev
*tegra_fbdev_create(struct drm_device
*drm
,
270 unsigned int preferred_bpp
,
271 unsigned int num_crtc
,
272 unsigned int max_connectors
)
274 struct drm_fb_helper
*helper
;
275 struct tegra_fbdev
*fbdev
;
278 fbdev
= kzalloc(sizeof(*fbdev
), GFP_KERNEL
);
280 dev_err(drm
->dev
, "failed to allocate DRM fbdev\n");
281 return ERR_PTR(-ENOMEM
);
284 fbdev
->base
.funcs
= &tegra_fb_helper_funcs
;
285 helper
= &fbdev
->base
;
287 err
= drm_fb_helper_init(drm
, &fbdev
->base
, num_crtc
, max_connectors
);
289 dev_err(drm
->dev
, "failed to initialize DRM FB helper\n");
293 err
= drm_fb_helper_single_add_all_connectors(&fbdev
->base
);
295 dev_err(drm
->dev
, "failed to add connectors\n");
299 drm_helper_disable_unused_functions(drm
);
301 err
= drm_fb_helper_initial_config(&fbdev
->base
, preferred_bpp
);
303 dev_err(drm
->dev
, "failed to set initial configuration\n");
310 drm_fb_helper_fini(&fbdev
->base
);
316 static void tegra_fbdev_free(struct tegra_fbdev
*fbdev
)
318 struct fb_info
*info
= fbdev
->base
.fbdev
;
323 err
= unregister_framebuffer(info
);
325 DRM_DEBUG_KMS("failed to unregister framebuffer\n");
328 fb_dealloc_cmap(&info
->cmap
);
330 framebuffer_release(info
);
334 drm_framebuffer_unregister_private(&fbdev
->fb
->base
);
335 tegra_fb_destroy(&fbdev
->fb
->base
);
338 drm_fb_helper_fini(&fbdev
->base
);
342 static void tegra_fb_output_poll_changed(struct drm_device
*drm
)
344 struct tegra_drm
*tegra
= drm
->dev_private
;
347 drm_fb_helper_hotplug_event(&tegra
->fbdev
->base
);
350 static const struct drm_mode_config_funcs tegra_drm_mode_funcs
= {
351 .fb_create
= tegra_fb_create
,
352 .output_poll_changed
= tegra_fb_output_poll_changed
,
355 int tegra_drm_fb_init(struct drm_device
*drm
)
357 struct tegra_drm
*tegra
= drm
->dev_private
;
358 struct tegra_fbdev
*fbdev
;
360 drm
->mode_config
.min_width
= 0;
361 drm
->mode_config
.min_height
= 0;
363 drm
->mode_config
.max_width
= 4096;
364 drm
->mode_config
.max_height
= 4096;
366 drm
->mode_config
.funcs
= &tegra_drm_mode_funcs
;
368 fbdev
= tegra_fbdev_create(drm
, 32, drm
->mode_config
.num_crtc
,
369 drm
->mode_config
.num_connector
);
371 return PTR_ERR(fbdev
);
373 tegra
->fbdev
= fbdev
;
378 void tegra_drm_fb_exit(struct drm_device
*drm
)
380 struct tegra_drm
*tegra
= drm
->dev_private
;
382 tegra_fbdev_free(tegra
->fbdev
);
385 void tegra_fbdev_restore_mode(struct tegra_fbdev
*fbdev
)
388 drm_modeset_lock_all(fbdev
->base
.dev
);
389 drm_fb_helper_restore_fbdev_mode(&fbdev
->base
);
390 drm_modeset_unlock_all(fbdev
->base
.dev
);