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Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Inki Dae1c248b72011-10-04 19:19:01 +09002/* exynos_drm_fb.c
3 *
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Authors:
6 * Inki Dae <inki.dae@samsung.com>
7 * Joonyoung Shim <jy0922.shim@samsung.com>
8 * Seung-Woo Kim <sw0312.kim@samsung.com>
Inki Dae1c248b72011-10-04 19:19:01 +09009 */
10
David Howells760285e2012-10-02 18:01:07 +010011#include <drm/drmP.h>
Gustavo Padovand6562a22015-06-01 12:04:52 -030012#include <drm/drm_atomic.h>
Gustavo Padovan910874a2015-06-01 12:04:46 -030013#include <drm/drm_atomic_helper.h>
Daniel Vetterfcd70cd2019-01-17 22:03:34 +010014#include <drm/drm_crtc.h>
15#include <drm/drm_fb_helper.h>
Daniel Stoneb11954a2018-03-30 15:11:30 +010016#include <drm/drm_gem_framebuffer_helper.h>
Daniel Vetterfcd70cd2019-01-17 22:03:34 +010017#include <drm/drm_probe_helper.h>
Inki Dae0519f9a2012-10-20 07:53:42 -070018#include <uapi/drm/exynos_drm.h>
Inki Dae1c248b72011-10-04 19:19:01 +090019
Seung-Woo Kim7db3eba2011-10-18 16:58:05 +090020#include "exynos_drm_drv.h"
Inki Dae1c248b72011-10-04 19:19:01 +090021#include "exynos_drm_fb.h"
Andrzej Hajda25928a32014-03-17 11:27:17 +010022#include "exynos_drm_fbdev.h"
Sean Paul080be03d2014-02-19 21:02:55 +090023#include "exynos_drm_crtc.h"
Inki Dae1c248b72011-10-04 19:19:01 +090024
Inki Dae0519f9a2012-10-20 07:53:42 -070025static int check_fb_gem_memory_type(struct drm_device *drm_dev,
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090026 struct exynos_drm_gem *exynos_gem)
Inki Dae0519f9a2012-10-20 07:53:42 -070027{
28 unsigned int flags;
29
30 /*
31 * if exynos drm driver supports iommu then framebuffer can use
32 * all the buffer types.
33 */
34 if (is_drm_iommu_supported(drm_dev))
35 return 0;
36
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090037 flags = exynos_gem->flags;
Inki Dae0519f9a2012-10-20 07:53:42 -070038
39 /*
Shuah Khan6244bd62016-08-08 17:48:20 -060040 * Physically non-contiguous memory type for framebuffer is not
41 * supported without IOMMU.
Inki Dae0519f9a2012-10-20 07:53:42 -070042 */
43 if (IS_NONCONTIG_BUFFER(flags)) {
Inki Dae6f83d202019-04-15 14:24:36 +090044 DRM_DEV_ERROR(drm_dev->dev,
45 "Non-contiguous GEM memory is not supported.\n");
Inki Dae0519f9a2012-10-20 07:53:42 -070046 return -EINVAL;
47 }
48
49 return 0;
50}
51
Ville Syrjälä800ba2b2015-12-15 12:21:06 +010052static const struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
Daniel Stoneb11954a2018-03-30 15:11:30 +010053 .destroy = drm_gem_fb_destroy,
54 .create_handle = drm_gem_fb_create_handle,
Inki Dae1c248b72011-10-04 19:19:01 +090055};
56
Joonyoung Shime1533c02011-12-13 14:46:57 +090057struct drm_framebuffer *
58exynos_drm_framebuffer_init(struct drm_device *dev,
Ville Syrjälä1eb83452015-11-11 19:11:29 +020059 const struct drm_mode_fb_cmd2 *mode_cmd,
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090060 struct exynos_drm_gem **exynos_gem,
Joonyoung Shimd56125a2015-09-01 16:22:52 +090061 int count)
Inki Dae1c248b72011-10-04 19:19:01 +090062{
Daniel Stoneff059fc2018-03-30 15:11:32 +010063 struct drm_framebuffer *fb;
Joonyoung Shimd56125a2015-09-01 16:22:52 +090064 int i;
Inki Dae1c248b72011-10-04 19:19:01 +090065 int ret;
66
Daniel Stoneff059fc2018-03-30 15:11:32 +010067 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
68 if (!fb)
Inki Dae1c248b72011-10-04 19:19:01 +090069 return ERR_PTR(-ENOMEM);
Inki Dae1c248b72011-10-04 19:19:01 +090070
Joonyoung Shimd56125a2015-09-01 16:22:52 +090071 for (i = 0; i < count; i++) {
Joonyoung Shim813fd67b2015-10-02 09:33:47 +090072 ret = check_fb_gem_memory_type(dev, exynos_gem[i]);
Joonyoung Shimd56125a2015-09-01 16:22:52 +090073 if (ret < 0)
74 goto err;
75
Daniel Stoneff059fc2018-03-30 15:11:32 +010076 fb->obj[i] = &exynos_gem[i]->base;
Joonyoung Shimd56125a2015-09-01 16:22:52 +090077 }
78
Daniel Stoneff059fc2018-03-30 15:11:32 +010079 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
Joonyoung Shim94e30d92015-09-01 16:22:47 +090080
Daniel Stoneff059fc2018-03-30 15:11:32 +010081 ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
Joonyoung Shimd56125a2015-09-01 16:22:52 +090082 if (ret < 0) {
Inki Dae6f83d202019-04-15 14:24:36 +090083 DRM_DEV_ERROR(dev->dev,
84 "failed to initialize framebuffer\n");
Joonyoung Shimd56125a2015-09-01 16:22:52 +090085 goto err;
Inki Dae1c248b72011-10-04 19:19:01 +090086 }
87
Daniel Stoneff059fc2018-03-30 15:11:32 +010088 return fb;
Joonyoung Shimd56125a2015-09-01 16:22:52 +090089
90err:
Daniel Stoneff059fc2018-03-30 15:11:32 +010091 kfree(fb);
Joonyoung Shimd56125a2015-09-01 16:22:52 +090092 return ERR_PTR(ret);
Inki Dae1c248b72011-10-04 19:19:01 +090093}
94
Joonyoung Shime1533c02011-12-13 14:46:57 +090095static struct drm_framebuffer *
96exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
Ville Syrjälä1eb83452015-11-11 19:11:29 +020097 const struct drm_mode_fb_cmd2 *mode_cmd)
Inki Dae1c248b72011-10-04 19:19:01 +090098{
Marek Szyprowski1899bd52017-07-12 12:09:22 +020099 const struct drm_format_info *info = drm_get_format_info(dev, mode_cmd);
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900100 struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
Joonyoung Shim8d317582015-09-01 16:22:53 +0900101 struct drm_framebuffer *fb;
102 int i;
103 int ret;
Joonyoung Shime1533c02011-12-13 14:46:57 +0900104
Marek Szyprowski1899bd52017-07-12 12:09:22 +0200105 for (i = 0; i < info->num_planes; i++) {
106 unsigned int height = (i == 0) ? mode_cmd->height :
107 DIV_ROUND_UP(mode_cmd->height, info->vsub);
108 unsigned long size = height * mode_cmd->pitches[i] +
109 mode_cmd->offsets[i];
110
Marek Szyprowskie978de52018-07-09 15:44:32 +0200111 exynos_gem[i] = exynos_drm_gem_get(file_priv,
112 mode_cmd->handles[i]);
113 if (!exynos_gem[i]) {
Inki Dae6f83d202019-04-15 14:24:36 +0900114 DRM_DEV_ERROR(dev->dev,
115 "failed to lookup gem object\n");
YoungJun Cho979c0c72013-02-12 21:23:54 +0900116 ret = -ENOENT;
Joonyoung Shimdcbb85a2015-09-01 16:22:51 +0900117 goto err;
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900118 }
119
Marek Szyprowski1899bd52017-07-12 12:09:22 +0200120 if (size > exynos_gem[i]->size) {
121 i++;
122 ret = -EINVAL;
123 goto err;
124 }
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900125 }
126
Joonyoung Shim813fd67b2015-10-02 09:33:47 +0900127 fb = exynos_drm_framebuffer_init(dev, mode_cmd, exynos_gem, i);
Joonyoung Shim8d317582015-09-01 16:22:53 +0900128 if (IS_ERR(fb)) {
129 ret = PTR_ERR(fb);
Joonyoung Shimdcbb85a2015-09-01 16:22:51 +0900130 goto err;
Daniel Vetterf2c00952012-12-14 13:39:03 +0900131 }
132
Joonyoung Shim8d317582015-09-01 16:22:53 +0900133 return fb;
YoungJun Cho979c0c72013-02-12 21:23:54 +0900134
Joonyoung Shimdcbb85a2015-09-01 16:22:51 +0900135err:
Joonyoung Shim8d317582015-09-01 16:22:53 +0900136 while (i--)
Marek Szyprowskie978de52018-07-09 15:44:32 +0200137 exynos_drm_gem_put(exynos_gem[i]);
YoungJun Cho979c0c72013-02-12 21:23:54 +0900138
YoungJun Cho979c0c72013-02-12 21:23:54 +0900139 return ERR_PTR(ret);
Inki Dae1c248b72011-10-04 19:19:01 +0900140}
141
Marek Szyprowski0488f502015-11-30 14:53:21 +0100142dma_addr_t exynos_drm_fb_dma_addr(struct drm_framebuffer *fb, int index)
Inki Dae1c248b72011-10-04 19:19:01 +0900143{
Daniel Stone7b305082018-03-30 15:11:31 +0100144 struct exynos_drm_gem *exynos_gem;
Inki Dae1c248b72011-10-04 19:19:01 +0900145
Christoph Hellwige0c7a512017-05-22 10:40:52 +0200146 if (WARN_ON_ONCE(index >= MAX_FB_BUFFER))
147 return 0;
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900148
Daniel Stone7b305082018-03-30 15:11:31 +0100149 exynos_gem = to_exynos_gem(fb->obj[index]);
150 return exynos_gem->dma_addr + fb->offsets[index];
Inki Dae1c248b72011-10-04 19:19:01 +0900151}
152
Inki Dae41cbf0f2017-01-20 12:51:41 +0900153static struct drm_mode_config_helper_funcs exynos_drm_mode_config_helpers = {
Maxime Ripard81a099a2017-07-20 15:01:16 +0200154 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
Inki Dae41cbf0f2017-01-20 12:51:41 +0900155};
156
Laurent Pincharte6ecefa2012-05-17 13:27:23 +0200157static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
Joonyoung Shime1533c02011-12-13 14:46:57 +0900158 .fb_create = exynos_user_fb_create,
Noralf Trønnesd2936152017-12-05 19:24:57 +0100159 .output_poll_changed = drm_fb_helper_output_poll_changed,
Peter Ujfalusia7da5cf2018-03-21 12:20:25 +0200160 .atomic_check = drm_atomic_helper_check,
Inki Dae41cbf0f2017-01-20 12:51:41 +0900161 .atomic_commit = drm_atomic_helper_commit,
Inki Dae1c248b72011-10-04 19:19:01 +0900162};
163
164void exynos_drm_mode_config_init(struct drm_device *dev)
165{
166 dev->mode_config.min_width = 0;
167 dev->mode_config.min_height = 0;
168
169 /*
170 * set max width and height as default value(4096x4096).
171 * this value would be used to check framebuffer size limitation
172 * at drm_mode_addfb().
173 */
174 dev->mode_config.max_width = 4096;
175 dev->mode_config.max_height = 4096;
176
177 dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
Inki Dae41cbf0f2017-01-20 12:51:41 +0900178 dev->mode_config.helper_private = &exynos_drm_mode_config_helpers;
Tobias Jakobif40031c2017-08-22 16:19:37 +0200179
180 dev->mode_config.allow_fb_modifiers = true;
Peter Ujfalusia7da5cf2018-03-21 12:20:25 +0200181
182 dev->mode_config.normalize_zpos = true;
Inki Dae1c248b72011-10-04 19:19:01 +0900183}