1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 4 * Author:Mark Yao <mark.yao@rock-chips.com> 5 */ 6 7 #include <linux/kernel.h> 8 #include <drm/drm.h> 9 #include <drm/drmP.h> 10 #include <drm/drm_atomic.h> 11 #include <drm/drm_damage_helper.h> 12 #include <drm/drm_fb_helper.h> 13 #include <drm/drm_gem_framebuffer_helper.h> 14 #include <drm/drm_probe_helper.h> 15 16 #include "rockchip_drm_drv.h" 17 #include "rockchip_drm_fb.h" 18 #include "rockchip_drm_gem.h" 19 #include "rockchip_drm_psr.h" 20 21 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { 22 .destroy = drm_gem_fb_destroy, 23 .create_handle = drm_gem_fb_create_handle, 24 .dirty = drm_atomic_helper_dirtyfb, 25 }; 26 27 static struct drm_framebuffer * 28 rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, 29 struct drm_gem_object **obj, unsigned int num_planes) 30 { 31 struct drm_framebuffer *fb; 32 int ret; 33 int i; 34 35 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 36 if (!fb) 37 return ERR_PTR(-ENOMEM); 38 39 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 40 41 for (i = 0; i < num_planes; i++) 42 fb->obj[i] = obj[i]; 43 44 ret = drm_framebuffer_init(dev, fb, &rockchip_drm_fb_funcs); 45 if (ret) { 46 DRM_DEV_ERROR(dev->dev, 47 "Failed to initialize framebuffer: %d\n", 48 ret); 49 kfree(fb); 50 return ERR_PTR(ret); 51 } 52 53 return fb; 54 } 55 56 static struct drm_framebuffer * 57 rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 58 const struct drm_mode_fb_cmd2 *mode_cmd) 59 { 60 const struct drm_format_info *info = drm_get_format_info(dev, 61 mode_cmd); 62 struct drm_framebuffer *fb; 63 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; 64 struct drm_gem_object *obj; 65 int num_planes = min_t(int, info->num_planes, ROCKCHIP_MAX_FB_BUFFER); 66 int ret; 67 int i; 68 69 for (i = 0; i < num_planes; i++) { 70 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 71 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 72 unsigned int min_size; 73 74 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]); 75 if (!obj) { 76 DRM_DEV_ERROR(dev->dev, 77 "Failed to lookup GEM object\n"); 78 ret = -ENXIO; 79 goto err_gem_object_unreference; 80 } 81 82 min_size = (height - 1) * mode_cmd->pitches[i] + 83 mode_cmd->offsets[i] + 84 width * info->cpp[i]; 85 86 if (obj->size < min_size) { 87 drm_gem_object_put_unlocked(obj); 88 ret = -EINVAL; 89 goto err_gem_object_unreference; 90 } 91 objs[i] = obj; 92 } 93 94 fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); 95 if (IS_ERR(fb)) { 96 ret = PTR_ERR(fb); 97 goto err_gem_object_unreference; 98 } 99 100 return fb; 101 102 err_gem_object_unreference: 103 for (i--; i >= 0; i--) 104 drm_gem_object_put_unlocked(objs[i]); 105 return ERR_PTR(ret); 106 } 107 108 static void 109 rockchip_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) 110 { 111 struct drm_device *dev = old_state->dev; 112 113 rockchip_drm_psr_inhibit_get_state(old_state); 114 115 drm_atomic_helper_commit_modeset_disables(dev, old_state); 116 117 drm_atomic_helper_commit_modeset_enables(dev, old_state); 118 119 drm_atomic_helper_commit_planes(dev, old_state, 120 DRM_PLANE_COMMIT_ACTIVE_ONLY); 121 122 rockchip_drm_psr_inhibit_put_state(old_state); 123 124 drm_atomic_helper_commit_hw_done(old_state); 125 126 drm_atomic_helper_wait_for_vblanks(dev, old_state); 127 128 drm_atomic_helper_cleanup_planes(dev, old_state); 129 } 130 131 static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { 132 .atomic_commit_tail = rockchip_atomic_helper_commit_tail_rpm, 133 }; 134 135 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { 136 .fb_create = rockchip_user_fb_create, 137 .output_poll_changed = drm_fb_helper_output_poll_changed, 138 .atomic_check = drm_atomic_helper_check, 139 .atomic_commit = drm_atomic_helper_commit, 140 }; 141 142 struct drm_framebuffer * 143 rockchip_drm_framebuffer_init(struct drm_device *dev, 144 const struct drm_mode_fb_cmd2 *mode_cmd, 145 struct drm_gem_object *obj) 146 { 147 struct drm_framebuffer *fb; 148 149 fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); 150 if (IS_ERR(fb)) 151 return ERR_CAST(fb); 152 153 return fb; 154 } 155 156 void rockchip_drm_mode_config_init(struct drm_device *dev) 157 { 158 dev->mode_config.min_width = 0; 159 dev->mode_config.min_height = 0; 160 161 /* 162 * set max width and height as default value(4096x4096). 163 * this value would be used to check framebuffer size limitation 164 * at drm_mode_addfb(). 165 */ 166 dev->mode_config.max_width = 4096; 167 dev->mode_config.max_height = 4096; 168 169 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; 170 dev->mode_config.helper_private = &rockchip_mode_config_helpers; 171 } 172