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_crtc_helper.h>
18 #include <drm/drm_fb_helper.h>
19 #include <uapi/drm/exynos_drm.h>
21 #include "exynos_drm_drv.h"
22 #include "exynos_drm_fb.h"
23 #include "exynos_drm_gem.h"
24 #include "exynos_drm_iommu.h"
25 #include "exynos_drm_encoder.h"
27 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
30 * exynos specific framebuffer structure.
32 * @fb: drm framebuffer obejct.
33 * @buf_cnt: a buffer count to drm framebuffer.
34 * @exynos_gem_obj: array of exynos specific gem object containing a gem object.
36 struct exynos_drm_fb
{
37 struct drm_framebuffer fb
;
39 struct exynos_drm_gem_obj
*exynos_gem_obj
[MAX_FB_BUFFER
];
42 static int check_fb_gem_memory_type(struct drm_device
*drm_dev
,
43 struct exynos_drm_gem_obj
*exynos_gem_obj
)
48 * if exynos drm driver supports iommu then framebuffer can use
49 * all the buffer types.
51 if (is_drm_iommu_supported(drm_dev
))
54 flags
= exynos_gem_obj
->flags
;
57 * without iommu support, not support physically non-continuous memory
60 if (IS_NONCONTIG_BUFFER(flags
)) {
61 DRM_ERROR("cannot use this gem memory type for fb.\n");
68 static void exynos_drm_fb_destroy(struct drm_framebuffer
*fb
)
70 struct exynos_drm_fb
*exynos_fb
= to_exynos_fb(fb
);
73 DRM_DEBUG_KMS("%s\n", __FILE__
);
75 /* make sure that overlay data are updated before relesing fb. */
76 exynos_drm_encoder_complete_scanout(fb
);
78 drm_framebuffer_cleanup(fb
);
80 for (i
= 0; i
< ARRAY_SIZE(exynos_fb
->exynos_gem_obj
); i
++) {
81 struct drm_gem_object
*obj
;
83 if (exynos_fb
->exynos_gem_obj
[i
] == NULL
)
86 obj
= &exynos_fb
->exynos_gem_obj
[i
]->base
;
87 drm_gem_object_unreference_unlocked(obj
);
94 static int exynos_drm_fb_create_handle(struct drm_framebuffer
*fb
,
95 struct drm_file
*file_priv
,
98 struct exynos_drm_fb
*exynos_fb
= to_exynos_fb(fb
);
100 DRM_DEBUG_KMS("%s\n", __FILE__
);
102 /* This fb should have only one gem object. */
103 if (WARN_ON(exynos_fb
->buf_cnt
!= 1))
106 return drm_gem_handle_create(file_priv
,
107 &exynos_fb
->exynos_gem_obj
[0]->base
, handle
);
110 static int exynos_drm_fb_dirty(struct drm_framebuffer
*fb
,
111 struct drm_file
*file_priv
, unsigned flags
,
112 unsigned color
, struct drm_clip_rect
*clips
,
115 DRM_DEBUG_KMS("%s\n", __FILE__
);
122 static struct drm_framebuffer_funcs exynos_drm_fb_funcs
= {
123 .destroy
= exynos_drm_fb_destroy
,
124 .create_handle
= exynos_drm_fb_create_handle
,
125 .dirty
= exynos_drm_fb_dirty
,
128 void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer
*fb
,
131 struct exynos_drm_fb
*exynos_fb
;
133 exynos_fb
= to_exynos_fb(fb
);
135 exynos_fb
->buf_cnt
= cnt
;
138 unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer
*fb
)
140 struct exynos_drm_fb
*exynos_fb
;
142 exynos_fb
= to_exynos_fb(fb
);
144 return exynos_fb
->buf_cnt
;
147 struct drm_framebuffer
*
148 exynos_drm_framebuffer_init(struct drm_device
*dev
,
149 struct drm_mode_fb_cmd2
*mode_cmd
,
150 struct drm_gem_object
*obj
)
152 struct exynos_drm_fb
*exynos_fb
;
153 struct exynos_drm_gem_obj
*exynos_gem_obj
;
156 exynos_gem_obj
= to_exynos_gem_obj(obj
);
158 ret
= check_fb_gem_memory_type(dev
, exynos_gem_obj
);
160 DRM_ERROR("cannot use this gem memory type for fb.\n");
161 return ERR_PTR(-EINVAL
);
164 exynos_fb
= kzalloc(sizeof(*exynos_fb
), GFP_KERNEL
);
166 DRM_ERROR("failed to allocate exynos drm framebuffer\n");
167 return ERR_PTR(-ENOMEM
);
170 drm_helper_mode_fill_fb_struct(&exynos_fb
->fb
, mode_cmd
);
171 exynos_fb
->exynos_gem_obj
[0] = exynos_gem_obj
;
173 ret
= drm_framebuffer_init(dev
, &exynos_fb
->fb
, &exynos_drm_fb_funcs
);
175 DRM_ERROR("failed to initialize framebuffer\n");
179 return &exynos_fb
->fb
;
182 static u32
exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2
*mode_cmd
)
184 unsigned int cnt
= 0;
186 if (mode_cmd
->pixel_format
!= DRM_FORMAT_NV12
)
187 return drm_format_num_planes(mode_cmd
->pixel_format
);
189 while (cnt
!= MAX_FB_BUFFER
) {
190 if (!mode_cmd
->handles
[cnt
])
196 * check if NV12 or NV12M.
199 * handles[0] = base1, offsets[0] = 0
200 * handles[1] = base1, offsets[1] = Y_size
203 * handles[0] = base1, offsets[0] = 0
204 * handles[1] = base2, offsets[1] = 0
208 * in case of NV12 format, offsets[1] is not 0 and
209 * handles[0] is same as handles[1].
211 if (mode_cmd
->offsets
[1] &&
212 mode_cmd
->handles
[0] == mode_cmd
->handles
[1])
219 static struct drm_framebuffer
*
220 exynos_user_fb_create(struct drm_device
*dev
, struct drm_file
*file_priv
,
221 struct drm_mode_fb_cmd2
*mode_cmd
)
223 struct drm_gem_object
*obj
;
224 struct exynos_drm_gem_obj
*exynos_gem_obj
;
225 struct exynos_drm_fb
*exynos_fb
;
228 DRM_DEBUG_KMS("%s\n", __FILE__
);
230 exynos_fb
= kzalloc(sizeof(*exynos_fb
), GFP_KERNEL
);
232 DRM_ERROR("failed to allocate exynos drm framebuffer\n");
233 return ERR_PTR(-ENOMEM
);
236 obj
= drm_gem_object_lookup(dev
, file_priv
, mode_cmd
->handles
[0]);
238 DRM_ERROR("failed to lookup gem object\n");
243 drm_helper_mode_fill_fb_struct(&exynos_fb
->fb
, mode_cmd
);
244 exynos_fb
->exynos_gem_obj
[0] = to_exynos_gem_obj(obj
);
245 exynos_fb
->buf_cnt
= exynos_drm_format_num_buffers(mode_cmd
);
247 DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb
->buf_cnt
);
249 for (i
= 1; i
< exynos_fb
->buf_cnt
; i
++) {
250 obj
= drm_gem_object_lookup(dev
, file_priv
,
251 mode_cmd
->handles
[i
]);
253 DRM_ERROR("failed to lookup gem object\n");
255 exynos_fb
->buf_cnt
= i
;
256 goto err_unreference
;
259 exynos_gem_obj
= to_exynos_gem_obj(obj
);
260 exynos_fb
->exynos_gem_obj
[i
] = exynos_gem_obj
;
262 ret
= check_fb_gem_memory_type(dev
, exynos_gem_obj
);
264 DRM_ERROR("cannot use this gem memory type for fb.\n");
265 goto err_unreference
;
269 ret
= drm_framebuffer_init(dev
, &exynos_fb
->fb
, &exynos_drm_fb_funcs
);
271 DRM_ERROR("failed to init framebuffer.\n");
272 goto err_unreference
;
275 return &exynos_fb
->fb
;
278 for (i
= 0; i
< exynos_fb
->buf_cnt
; i
++) {
279 struct drm_gem_object
*obj
;
281 obj
= &exynos_fb
->exynos_gem_obj
[i
]->base
;
283 drm_gem_object_unreference_unlocked(obj
);
290 struct exynos_drm_gem_buf
*exynos_drm_fb_buffer(struct drm_framebuffer
*fb
,
293 struct exynos_drm_fb
*exynos_fb
= to_exynos_fb(fb
);
294 struct exynos_drm_gem_buf
*buffer
;
296 DRM_DEBUG_KMS("%s\n", __FILE__
);
298 if (index
>= MAX_FB_BUFFER
)
301 buffer
= exynos_fb
->exynos_gem_obj
[index
]->buffer
;
305 DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer
->dma_addr
);
310 static void exynos_drm_output_poll_changed(struct drm_device
*dev
)
312 struct exynos_drm_private
*private = dev
->dev_private
;
313 struct drm_fb_helper
*fb_helper
= private->fb_helper
;
316 drm_fb_helper_hotplug_event(fb_helper
);
319 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs
= {
320 .fb_create
= exynos_user_fb_create
,
321 .output_poll_changed
= exynos_drm_output_poll_changed
,
324 void exynos_drm_mode_config_init(struct drm_device
*dev
)
326 dev
->mode_config
.min_width
= 0;
327 dev
->mode_config
.min_height
= 0;
330 * set max width and height as default value(4096x4096).
331 * this value would be used to check framebuffer size limitation
332 * at drm_mode_addfb().
334 dev
->mode_config
.max_width
= 4096;
335 dev
->mode_config
.max_height
= 4096;
337 dev
->mode_config
.funcs
= &exynos_drm_mode_config_funcs
;