1 /* 2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 3 * Author:Mark Yao <mark.yao@rock-chips.com> 4 * 5 * This software is licensed under the terms of the GNU General Public 6 * License version 2, as published by the Free Software Foundation, and 7 * may be copied, distributed, and modified under those terms. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #include <linux/kernel.h> 16 #include <drm/drm.h> 17 #include <drm/drmP.h> 18 #include <drm/drm_atomic.h> 19 #include <drm/drm_fb_helper.h> 20 #include <drm/drm_crtc_helper.h> 21 #include <drm/drm_gem_framebuffer_helper.h> 22 23 #include "rockchip_drm_drv.h" 24 #include "rockchip_drm_fb.h" 25 #include "rockchip_drm_gem.h" 26 #include "rockchip_drm_psr.h" 27 28 static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb, 29 struct drm_file *file, 30 unsigned int flags, unsigned int color, 31 struct drm_clip_rect *clips, 32 unsigned int num_clips) 33 { 34 rockchip_drm_psr_flush_all(fb->dev); 35 return 0; 36 } 37 38 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { 39 .destroy = drm_gem_fb_destroy, 40 .create_handle = drm_gem_fb_create_handle, 41 .dirty = rockchip_drm_fb_dirty, 42 }; 43 44 static struct drm_framebuffer * 45 rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, 46 struct drm_gem_object **obj, unsigned int num_planes) 47 { 48 struct drm_framebuffer *fb; 49 int ret; 50 int i; 51 52 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 53 if (!fb) 54 return ERR_PTR(-ENOMEM); 55 56 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 57 58 for (i = 0; i < num_planes; i++) 59 fb->obj[i] = obj[i]; 60 61 ret = drm_framebuffer_init(dev, fb, &rockchip_drm_fb_funcs); 62 if (ret) { 63 DRM_DEV_ERROR(dev->dev, 64 "Failed to initialize framebuffer: %d\n", 65 ret); 66 kfree(fb); 67 return ERR_PTR(ret); 68 } 69 70 return fb; 71 } 72 73 static struct drm_framebuffer * 74 rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 75 const struct drm_mode_fb_cmd2 *mode_cmd) 76 { 77 struct drm_framebuffer *fb; 78 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; 79 struct drm_gem_object *obj; 80 unsigned int hsub; 81 unsigned int vsub; 82 int num_planes; 83 int ret; 84 int i; 85 86 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); 87 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); 88 num_planes = min(drm_format_num_planes(mode_cmd->pixel_format), 89 ROCKCHIP_MAX_FB_BUFFER); 90 91 for (i = 0; i < num_planes; i++) { 92 unsigned int width = mode_cmd->width / (i ? hsub : 1); 93 unsigned int height = mode_cmd->height / (i ? vsub : 1); 94 unsigned int min_size; 95 96 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]); 97 if (!obj) { 98 DRM_DEV_ERROR(dev->dev, 99 "Failed to lookup GEM object\n"); 100 ret = -ENXIO; 101 goto err_gem_object_unreference; 102 } 103 104 min_size = (height - 1) * mode_cmd->pitches[i] + 105 mode_cmd->offsets[i] + 106 width * drm_format_plane_cpp(mode_cmd->pixel_format, i); 107 108 if (obj->size < min_size) { 109 drm_gem_object_put_unlocked(obj); 110 ret = -EINVAL; 111 goto err_gem_object_unreference; 112 } 113 objs[i] = obj; 114 } 115 116 fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); 117 if (IS_ERR(fb)) { 118 ret = PTR_ERR(fb); 119 goto err_gem_object_unreference; 120 } 121 122 return fb; 123 124 err_gem_object_unreference: 125 for (i--; i >= 0; i--) 126 drm_gem_object_put_unlocked(objs[i]); 127 return ERR_PTR(ret); 128 } 129 130 static void 131 rockchip_drm_psr_inhibit_get_state(struct drm_atomic_state *state) 132 { 133 struct drm_crtc *crtc; 134 struct drm_crtc_state *crtc_state; 135 struct drm_encoder *encoder; 136 u32 encoder_mask = 0; 137 int i; 138 139 for_each_old_crtc_in_state(state, crtc, crtc_state, i) { 140 encoder_mask |= crtc_state->encoder_mask; 141 encoder_mask |= crtc->state->encoder_mask; 142 } 143 144 drm_for_each_encoder_mask(encoder, state->dev, encoder_mask) 145 rockchip_drm_psr_inhibit_get(encoder); 146 } 147 148 static void 149 rockchip_drm_psr_inhibit_put_state(struct drm_atomic_state *state) 150 { 151 struct drm_crtc *crtc; 152 struct drm_crtc_state *crtc_state; 153 struct drm_encoder *encoder; 154 u32 encoder_mask = 0; 155 int i; 156 157 for_each_old_crtc_in_state(state, crtc, crtc_state, i) { 158 encoder_mask |= crtc_state->encoder_mask; 159 encoder_mask |= crtc->state->encoder_mask; 160 } 161 162 drm_for_each_encoder_mask(encoder, state->dev, encoder_mask) 163 rockchip_drm_psr_inhibit_put(encoder); 164 } 165 166 static void 167 rockchip_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) 168 { 169 struct drm_device *dev = old_state->dev; 170 171 rockchip_drm_psr_inhibit_get_state(old_state); 172 173 drm_atomic_helper_commit_modeset_disables(dev, old_state); 174 175 drm_atomic_helper_commit_modeset_enables(dev, old_state); 176 177 drm_atomic_helper_commit_planes(dev, old_state, 178 DRM_PLANE_COMMIT_ACTIVE_ONLY); 179 180 rockchip_drm_psr_inhibit_put_state(old_state); 181 182 drm_atomic_helper_commit_hw_done(old_state); 183 184 drm_atomic_helper_wait_for_vblanks(dev, old_state); 185 186 drm_atomic_helper_cleanup_planes(dev, old_state); 187 } 188 189 static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { 190 .atomic_commit_tail = rockchip_atomic_helper_commit_tail_rpm, 191 }; 192 193 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { 194 .fb_create = rockchip_user_fb_create, 195 .output_poll_changed = drm_fb_helper_output_poll_changed, 196 .atomic_check = drm_atomic_helper_check, 197 .atomic_commit = drm_atomic_helper_commit, 198 }; 199 200 struct drm_framebuffer * 201 rockchip_drm_framebuffer_init(struct drm_device *dev, 202 const struct drm_mode_fb_cmd2 *mode_cmd, 203 struct drm_gem_object *obj) 204 { 205 struct drm_framebuffer *fb; 206 207 fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); 208 if (IS_ERR(fb)) 209 return ERR_CAST(fb); 210 211 return fb; 212 } 213 214 void rockchip_drm_mode_config_init(struct drm_device *dev) 215 { 216 dev->mode_config.min_width = 0; 217 dev->mode_config.min_height = 0; 218 219 /* 220 * set max width and height as default value(4096x4096). 221 * this value would be used to check framebuffer size limitation 222 * at drm_mode_addfb(). 223 */ 224 dev->mode_config.max_width = 4096; 225 dev->mode_config.max_height = 4096; 226 227 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; 228 dev->mode_config.helper_private = &rockchip_mode_config_helpers; 229 } 230