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Inki Dae1c248b72011-10-04 19:19:01 +09001/* exynos_drm_fb.c
2 *
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * Authors:
5 * Inki Dae <inki.dae@samsung.com>
6 * Joonyoung Shim <jy0922.shim@samsung.com>
7 * Seung-Woo Kim <sw0312.kim@samsung.com>
8 *
Inki Daed81aecb2012-12-18 02:30:17 +09009 * 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.
Inki Dae1c248b72011-10-04 19:19:01 +090013 */
14
David Howells760285e2012-10-02 18:01:07 +010015#include <drm/drmP.h>
16#include <drm/drm_crtc.h>
17#include <drm/drm_crtc_helper.h>
18#include <drm/drm_fb_helper.h>
Gustavo Padovand6562a22015-06-01 12:04:52 -030019#include <drm/drm_atomic.h>
Gustavo Padovan910874a2015-06-01 12:04:46 -030020#include <drm/drm_atomic_helper.h>
Inki Dae0519f9a2012-10-20 07:53:42 -070021#include <uapi/drm/exynos_drm.h>
Inki Dae1c248b72011-10-04 19:19:01 +090022
Seung-Woo Kim7db3eba2011-10-18 16:58:05 +090023#include "exynos_drm_drv.h"
Inki Dae1c248b72011-10-04 19:19:01 +090024#include "exynos_drm_fb.h"
Andrzej Hajda25928a32014-03-17 11:27:17 +010025#include "exynos_drm_fbdev.h"
Inki Dae0519f9a2012-10-20 07:53:42 -070026#include "exynos_drm_iommu.h"
Sean Paul080be03d2014-02-19 21:02:55 +090027#include "exynos_drm_crtc.h"
Inki Dae1c248b72011-10-04 19:19:01 +090028
29#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
30
31/*
32 * exynos specific framebuffer structure.
33 *
34 * @fb: drm framebuffer obejct.
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090035 * @exynos_gem: array of exynos specific gem object containing a gem object.
Inki Dae1c248b72011-10-04 19:19:01 +090036 */
37struct exynos_drm_fb {
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090038 struct drm_framebuffer fb;
39 struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
Marek Szyprowski0488f502015-11-30 14:53:21 +010040 dma_addr_t dma_addr[MAX_FB_BUFFER];
Inki Dae1c248b72011-10-04 19:19:01 +090041};
42
Inki Dae0519f9a2012-10-20 07:53:42 -070043static int check_fb_gem_memory_type(struct drm_device *drm_dev,
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090044 struct exynos_drm_gem *exynos_gem)
Inki Dae0519f9a2012-10-20 07:53:42 -070045{
46 unsigned int flags;
47
48 /*
49 * if exynos drm driver supports iommu then framebuffer can use
50 * all the buffer types.
51 */
52 if (is_drm_iommu_supported(drm_dev))
53 return 0;
54
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090055 flags = exynos_gem->flags;
Inki Dae0519f9a2012-10-20 07:53:42 -070056
57 /*
Shuah Khan6244bd62016-08-08 17:48:20 -060058 * Physically non-contiguous memory type for framebuffer is not
59 * supported without IOMMU.
Inki Dae0519f9a2012-10-20 07:53:42 -070060 */
61 if (IS_NONCONTIG_BUFFER(flags)) {
Shuah Khan6244bd62016-08-08 17:48:20 -060062 DRM_ERROR("Non-contiguous GEM memory is not supported.\n");
Inki Dae0519f9a2012-10-20 07:53:42 -070063 return -EINVAL;
64 }
65
66 return 0;
67}
68
Inki Dae1c248b72011-10-04 19:19:01 +090069static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
70{
71 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
Laurent Pinchart07b68352012-05-16 17:08:56 +020072 unsigned int i;
Inki Dae1c248b72011-10-04 19:19:01 +090073
Inki Dae1c248b72011-10-04 19:19:01 +090074 drm_framebuffer_cleanup(fb);
75
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090076 for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem); i++) {
Laurent Pinchart07b68352012-05-16 17:08:56 +020077 struct drm_gem_object *obj;
78
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090079 if (exynos_fb->exynos_gem[i] == NULL)
Laurent Pinchart07b68352012-05-16 17:08:56 +020080 continue;
81
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090082 obj = &exynos_fb->exynos_gem[i]->base;
Laurent Pinchart07b68352012-05-16 17:08:56 +020083 drm_gem_object_unreference_unlocked(obj);
84 }
85
Inki Dae1c248b72011-10-04 19:19:01 +090086 kfree(exynos_fb);
87 exynos_fb = NULL;
88}
89
90static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
91 struct drm_file *file_priv,
92 unsigned int *handle)
93{
94 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
95
Inki Dae1c248b72011-10-04 19:19:01 +090096 return drm_gem_handle_create(file_priv,
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090097 &exynos_fb->exynos_gem[0]->base, handle);
Inki Dae1c248b72011-10-04 19:19:01 +090098}
99
Ville Syrjälä800ba2b2015-12-15 12:21:06 +0100100static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
Inki Dae1c248b72011-10-04 19:19:01 +0900101 .destroy = exynos_drm_fb_destroy,
102 .create_handle = exynos_drm_fb_create_handle,
Inki Dae1c248b72011-10-04 19:19:01 +0900103};
104
Joonyoung Shime1533c02011-12-13 14:46:57 +0900105struct drm_framebuffer *
106exynos_drm_framebuffer_init(struct drm_device *dev,
Ville Syrjälä1eb834512015-11-11 19:11:29 +0200107 const struct drm_mode_fb_cmd2 *mode_cmd,
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900108 struct exynos_drm_gem **exynos_gem,
Joonyoung Shimd56125a2015-09-01 16:22:52 +0900109 int count)
Inki Dae1c248b72011-10-04 19:19:01 +0900110{
111 struct exynos_drm_fb *exynos_fb;
Joonyoung Shimd56125a2015-09-01 16:22:52 +0900112 int i;
Inki Dae1c248b72011-10-04 19:19:01 +0900113 int ret;
114
Inki Dae1c248b72011-10-04 19:19:01 +0900115 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
Sachin Kamat38bb5252013-08-19 19:04:55 +0900116 if (!exynos_fb)
Inki Dae1c248b72011-10-04 19:19:01 +0900117 return ERR_PTR(-ENOMEM);
Inki Dae1c248b72011-10-04 19:19:01 +0900118
Joonyoung Shimd56125a2015-09-01 16:22:52 +0900119 for (i = 0; i < count; i++) {
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900120 ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
Joonyoung Shimd56125a2015-09-01 16:22:52 +0900121 if (ret < 0)
122 goto err;
123
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900124 exynos_fb->exynos_gem[i] = exynos_gem[i];
Marek Szyprowski0488f502015-11-30 14:53:21 +0100125 exynos_fb->dma_addr[i] = exynos_gem[i]->dma_addr
126 + mode_cmd->offsets[i];
Joonyoung Shimd56125a2015-09-01 16:22:52 +0900127 }
128
Ville Syrjäläa3f913c2016-12-14 22:48:59 +0200129 drm_helper_mode_fill_fb_struct(dev, &exynos_fb->fb, mode_cmd);
Joonyoung Shim94e30d92015-09-01 16:22:47 +0900130
Joonyoung Shime1533c02011-12-13 14:46:57 +0900131 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
Joonyoung Shimd56125a2015-09-01 16:22:52 +0900132 if (ret < 0) {
Joonyoung Shime1533c02011-12-13 14:46:57 +0900133 DRM_ERROR("failed to initialize framebuffer\n");
Joonyoung Shimd56125a2015-09-01 16:22:52 +0900134 goto err;
Inki Dae1c248b72011-10-04 19:19:01 +0900135 }
136
Joonyoung Shime1533c02011-12-13 14:46:57 +0900137 return &exynos_fb->fb;
Joonyoung Shimd56125a2015-09-01 16:22:52 +0900138
139err:
140 kfree(exynos_fb);
141 return ERR_PTR(ret);
Inki Dae1c248b72011-10-04 19:19:01 +0900142}
143
Joonyoung Shime1533c02011-12-13 14:46:57 +0900144static struct drm_framebuffer *
145exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
Ville Syrjälä1eb834512015-11-11 19:11:29 +0200146 const struct drm_mode_fb_cmd2 *mode_cmd)
Inki Dae1c248b72011-10-04 19:19:01 +0900147{
Marek Szyprowski1899bd52017-07-12 12:09:22 +0200148 const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd);
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900149 struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
Joonyoung Shime1533c02011-12-13 14:46:57 +0900150 struct drm_gem_object *obj;
Joonyoung Shim8d317582015-09-01 16:22:53 +0900151 struct drm_framebuffer *fb;
152 int i;
153 int ret;
Joonyoung Shime1533c02011-12-13 14:46:57 +0900154
Marek Szyprowski1899bd52017-07-12 12:09:22 +0200155 for (i = 0; i < info->num_planes; i++) {
156 unsigned int height = (i == 0) ? mode_cmd->height :
157 DIV_ROUND_UP(mode_cmd->height, info->vsub);
158 unsigned long size = height * mode_cmd->pitches[i] +
159 mode_cmd->offsets[i];
160
Chris Wilsona8ad0bd2016-05-09 11:04:54 +0100161 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]);
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900162 if (!obj) {
163 DRM_ERROR("failed to lookup gem object\n");
YoungJun Cho979c0c72013-02-12 21:23:54 +0900164 ret = -ENOENT;
Joonyoung Shimdcbb85a2015-09-01 16:22:51 +0900165 goto err;
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900166 }
167
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900168 exynos_gem[i] = to_exynos_gem(obj);
Marek Szyprowski1899bd52017-07-12 12:09:22 +0200169
170 if (size > exynos_gem[i]->size) {
171 i++;
172 ret = -EINVAL;
173 goto err;
174 }
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900175 }
176
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900177 fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
Joonyoung Shim8d317582015-09-01 16:22:53 +0900178 if (IS_ERR(fb)) {
179 ret = PTR_ERR(fb);
Joonyoung Shimdcbb85a2015-09-01 16:22:51 +0900180 goto err;
Daniel Vetterf2c00952012-12-14 13:39:03 +0900181 }
182
Joonyoung Shim8d317582015-09-01 16:22:53 +0900183 return fb;
YoungJun Cho979c0c72013-02-12 21:23:54 +0900184
Joonyoung Shimdcbb85a2015-09-01 16:22:51 +0900185err:
Joonyoung Shim8d317582015-09-01 16:22:53 +0900186 while (i--)
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900187 drm_gem_object_unreference_unlocked(&exynos_gem[i]->base);
YoungJun Cho979c0c72013-02-12 21:23:54 +0900188
YoungJun Cho979c0c72013-02-12 21:23:54 +0900189 return ERR_PTR(ret);
Inki Dae1c248b72011-10-04 19:19:01 +0900190}
191
Marek Szyprowski0488f502015-11-30 14:53:21 +0100192dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
Inki Dae1c248b72011-10-04 19:19:01 +0900193{
194 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
Inki Dae1c248b72011-10-04 19:19:01 +0900195
Christoph Hellwige0c7a512017-05-22 10:40:52 +0200196 if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
197 return 0;
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900198
Marek Szyprowski0488f502015-11-30 14:53:21 +0100199 return exynos_fb->dma_addr[index];
Inki Dae1c248b72011-10-04 19:19:01 +0900200}
201
Inki Dae41cbf0f2017-01-20 12:51:41 +0900202static void exynos_drm_atomic_commit_tail(struct drm_atomic_state *state)
203{
204 struct drm_device *dev = state->dev;
205
206 drm_atomic_helper_commit_modeset_disables(dev, state);
207
208 drm_atomic_helper_commit_modeset_enables(dev, state);
209
210 /*
211 * Exynos can't update planes with CRTCs and encoders disabled,
212 * its updates routines, specially for FIMD, requires the clocks
213 * to be enabled. So it is necessary to handle the modeset operations
214 * *before* the commit_planes() step, this way it will always
215 * have the relevant clocks enabled to perform the update.
216 */
217 drm_atomic_helper_commit_planes(dev, state,
218 DRM_PLANE_COMMIT_ACTIVE_ONLY);
219
220 drm_atomic_helper_commit_hw_done(state);
221
222 drm_atomic_helper_wait_for_vblanks(dev, state);
223
224 drm_atomic_helper_cleanup_planes(dev, state);
225}
226
227static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = {
228 .atomic_commit_tail = exynos_drm_atomic_commit_tail,
229};
230
Laurent Pincharte6ecefa2012-05-17 13:27:23 +0200231static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
Joonyoung Shime1533c02011-12-13 14:46:57 +0900232 .fb_create = exynos_user_fb_create,
Seung-Woo Kim7db3eba2011-10-18 16:58:05 +0900233 .output_poll_changed = exynos_drm_output_poll_changed,
Ville Syrjälä38d868e2016-10-10 17:50:56 +0300234 .atomic_check = exynos_atomic_check,
Inki Dae41cbf0f2017-01-20 12:51:41 +0900235 .atomic_commit = drm_atomic_helper_commit,
Inki Dae1c248b72011-10-04 19:19:01 +0900236};
237
238void exynos_drm_mode_config_init(struct drm_device *dev)
239{
240 dev->mode_config.min_width = 0;
241 dev->mode_config.min_height = 0;
242
243 /*
244 * set max width and height as default value(4096x4096).
245 * this value would be used to check framebuffer size limitation
246 * at drm_mode_addfb().
247 */
248 dev->mode_config.max_width = 4096;
249 dev->mode_config.max_height = 4096;
250
251 dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
Inki Dae41cbf0f2017-01-20 12:51:41 +0900252 dev->mode_config.helper_private = &exynos_drm_mode_config_helpers;
Inki Dae1c248b72011-10-04 19:19:01 +0900253}