1 // SPDX-License-Identifier: GPL-2.0
3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
7 #include <linux/component.h>
8 #include <linux/interrupt.h>
10 #include <drm/drm_atomic.h>
11 #include <drm/drm_atomic_helper.h>
12 #include <drm/drm_drv.h>
13 #include <drm/drm_fb_helper.h>
14 #include <drm/drm_gem_cma_helper.h>
15 #include <drm/drm_gem_framebuffer_helper.h>
16 #include <drm/drm_vblank.h>
18 #include "komeda_dev.h"
19 #include "komeda_framebuffer.h"
20 #include "komeda_kms.h"
22 DEFINE_DRM_GEM_CMA_FOPS(komeda_cma_fops);
24 static int komeda_gem_cma_dumb_create(struct drm_file *file,
25 struct drm_device *dev,
26 struct drm_mode_create_dumb *args)
28 u32 alignment = 16; /* TODO get alignment from dev */
30 args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8),
33 return drm_gem_cma_dumb_create_internal(file, dev, args);
36 static struct drm_driver komeda_kms_driver = {
37 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
39 .lastclose = drm_fb_helper_lastclose,
40 .gem_free_object_unlocked = drm_gem_cma_free_object,
41 .gem_vm_ops = &drm_gem_cma_vm_ops,
42 .dumb_create = komeda_gem_cma_dumb_create,
43 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
44 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
45 .gem_prime_export = drm_gem_prime_export,
46 .gem_prime_import = drm_gem_prime_import,
47 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
48 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
49 .gem_prime_vmap = drm_gem_cma_prime_vmap,
50 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
51 .gem_prime_mmap = drm_gem_cma_prime_mmap,
52 .fops = &komeda_cma_fops,
54 .desc = "Arm Komeda Display Processor driver",
60 static void komeda_kms_commit_tail(struct drm_atomic_state *old_state)
62 struct drm_device *dev = old_state->dev;
64 drm_atomic_helper_commit_modeset_disables(dev, old_state);
66 drm_atomic_helper_commit_planes(dev, old_state, 0);
68 drm_atomic_helper_commit_modeset_enables(dev, old_state);
70 drm_atomic_helper_wait_for_flip_done(dev, old_state);
72 drm_atomic_helper_commit_hw_done(old_state);
74 drm_atomic_helper_cleanup_planes(dev, old_state);
77 static const struct drm_mode_config_helper_funcs komeda_mode_config_helpers = {
78 .atomic_commit_tail = komeda_kms_commit_tail,
81 static const struct drm_mode_config_funcs komeda_mode_config_funcs = {
82 .fb_create = komeda_fb_create,
83 .atomic_check = drm_atomic_helper_check,
84 .atomic_commit = drm_atomic_helper_commit,
87 static void komeda_kms_mode_config_init(struct komeda_kms_dev *kms,
88 struct komeda_dev *mdev)
90 struct drm_mode_config *config = &kms->base.mode_config;
92 drm_mode_config_init(&kms->base);
94 komeda_kms_setup_crtcs(kms, mdev);
96 /* Get value from dev */
97 config->min_width = 0;
98 config->min_height = 0;
99 config->max_width = 4096;
100 config->max_height = 4096;
101 config->allow_fb_modifiers = false;
103 config->funcs = &komeda_mode_config_funcs;
104 config->helper_private = &komeda_mode_config_helpers;
107 struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
109 struct komeda_kms_dev *kms = kzalloc(sizeof(*kms), GFP_KERNEL);
110 struct drm_device *drm;
114 return ERR_PTR(-ENOMEM);
117 err = drm_dev_init(drm, &komeda_kms_driver, mdev->dev);
121 drm->dev_private = mdev;
123 komeda_kms_mode_config_init(kms, mdev);
125 err = komeda_kms_add_private_objs(kms, mdev);
127 goto cleanup_mode_config;
129 err = komeda_kms_add_planes(kms, mdev);
131 goto cleanup_mode_config;
133 err = drm_vblank_init(drm, kms->n_crtcs);
135 goto cleanup_mode_config;
137 err = komeda_kms_add_crtcs(kms, mdev);
139 goto cleanup_mode_config;
141 err = component_bind_all(mdev->dev, kms);
143 goto cleanup_mode_config;
145 drm_mode_config_reset(drm);
147 err = drm_dev_register(drm, 0);
149 goto cleanup_mode_config;
154 drm_mode_config_cleanup(drm);
160 void komeda_kms_detach(struct komeda_kms_dev *kms)
162 struct drm_device *drm = &kms->base;
163 struct komeda_dev *mdev = drm->dev_private;
165 drm_dev_unregister(drm);
166 component_unbind_all(mdev->dev, drm);
167 komeda_kms_cleanup_private_objs(mdev);
168 drm_mode_config_cleanup(drm);
169 drm->dev_private = NULL;