1 /* 2 * Copyright © 2014 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 */ 23 24 /** 25 * DOC: atomic plane helpers 26 * 27 * The functions here are used by the atomic plane helper functions to 28 * implement legacy plane updates (i.e., drm_plane->update_plane() and 29 * drm_plane->disable_plane()). This allows plane updates to use the 30 * atomic state infrastructure and perform plane updates as separate 31 * prepare/check/commit/cleanup steps. 32 */ 33 34 #include <drm/drmP.h> 35 #include <drm/drm_atomic_helper.h> 36 #include <drm/drm_plane_helper.h> 37 #include "intel_drv.h" 38 39 /** 40 * intel_create_plane_state - create plane state object 41 * @plane: drm plane 42 * 43 * Allocates a fresh plane state for the given plane and sets some of 44 * the state values to sensible initial values. 45 * 46 * Returns: A newly allocated plane state, or NULL on failure 47 */ 48 struct intel_plane_state * 49 intel_create_plane_state(struct drm_plane *plane) 50 { 51 struct intel_plane_state *state; 52 53 state = kzalloc(sizeof(*state), GFP_KERNEL); 54 if (!state) 55 return NULL; 56 57 state->base.plane = plane; 58 state->base.rotation = BIT(DRM_ROTATE_0); 59 60 return state; 61 } 62 63 /** 64 * intel_plane_duplicate_state - duplicate plane state 65 * @plane: drm plane 66 * 67 * Allocates and returns a copy of the plane state (both common and 68 * Intel-specific) for the specified plane. 69 * 70 * Returns: The newly allocated plane state, or NULL on failure. 71 */ 72 struct drm_plane_state * 73 intel_plane_duplicate_state(struct drm_plane *plane) 74 { 75 struct drm_plane_state *state; 76 struct intel_plane_state *intel_state; 77 78 if (WARN_ON(!plane->state)) 79 intel_state = intel_create_plane_state(plane); 80 else 81 intel_state = kmemdup(plane->state, sizeof(*intel_state), 82 GFP_KERNEL); 83 84 if (!intel_state) 85 return NULL; 86 87 state = &intel_state->base; 88 if (state->fb) 89 drm_framebuffer_reference(state->fb); 90 91 return state; 92 } 93 94 /** 95 * intel_plane_destroy_state - destroy plane state 96 * @plane: drm plane 97 * @state: state object to destroy 98 * 99 * Destroys the plane state (both common and Intel-specific) for the 100 * specified plane. 101 */ 102 void 103 intel_plane_destroy_state(struct drm_plane *plane, 104 struct drm_plane_state *state) 105 { 106 drm_atomic_helper_plane_destroy_state(plane, state); 107 } 108 109 static int intel_plane_atomic_check(struct drm_plane *plane, 110 struct drm_plane_state *state) 111 { 112 struct drm_crtc *crtc = state->crtc; 113 struct intel_crtc *intel_crtc; 114 struct intel_plane *intel_plane = to_intel_plane(plane); 115 struct intel_plane_state *intel_state = to_intel_plane_state(state); 116 117 crtc = crtc ? crtc : plane->crtc; 118 intel_crtc = to_intel_crtc(crtc); 119 120 /* 121 * Both crtc and plane->crtc could be NULL if we're updating a 122 * property while the plane is disabled. We don't actually have 123 * anything driver-specific we need to test in that case, so 124 * just return success. 125 */ 126 if (!crtc) 127 return 0; 128 129 /* 130 * The original src/dest coordinates are stored in state->base, but 131 * we want to keep another copy internal to our driver that we can 132 * clip/modify ourselves. 133 */ 134 intel_state->src.x1 = state->src_x; 135 intel_state->src.y1 = state->src_y; 136 intel_state->src.x2 = state->src_x + state->src_w; 137 intel_state->src.y2 = state->src_y + state->src_h; 138 intel_state->dst.x1 = state->crtc_x; 139 intel_state->dst.y1 = state->crtc_y; 140 intel_state->dst.x2 = state->crtc_x + state->crtc_w; 141 intel_state->dst.y2 = state->crtc_y + state->crtc_h; 142 143 /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */ 144 intel_state->clip.x1 = 0; 145 intel_state->clip.y1 = 0; 146 intel_state->clip.x2 = 147 intel_crtc->active ? intel_crtc->config->pipe_src_w : 0; 148 intel_state->clip.y2 = 149 intel_crtc->active ? intel_crtc->config->pipe_src_h : 0; 150 151 /* 152 * Disabling a plane is always okay; we just need to update 153 * fb tracking in a special way since cleanup_fb() won't 154 * get called by the plane helpers. 155 */ 156 if (state->fb == NULL && plane->state->fb != NULL) { 157 /* 158 * 'prepare' is never called when plane is being disabled, so 159 * we need to handle frontbuffer tracking as a special case 160 */ 161 intel_crtc->atomic.disabled_planes |= 162 (1 << drm_plane_index(plane)); 163 } 164 165 return intel_plane->check_plane(plane, intel_state); 166 } 167 168 static void intel_plane_atomic_update(struct drm_plane *plane, 169 struct drm_plane_state *old_state) 170 { 171 struct intel_plane *intel_plane = to_intel_plane(plane); 172 struct intel_plane_state *intel_state = 173 to_intel_plane_state(plane->state); 174 175 /* Don't disable an already disabled plane */ 176 if (!plane->state->fb && !old_state->fb) 177 return; 178 179 intel_plane->commit_plane(plane, intel_state); 180 } 181 182 const struct drm_plane_helper_funcs intel_plane_helper_funcs = { 183 .prepare_fb = intel_prepare_plane_fb, 184 .cleanup_fb = intel_cleanup_plane_fb, 185 .atomic_check = intel_plane_atomic_check, 186 .atomic_update = intel_plane_atomic_update, 187 }; 188 189 /** 190 * intel_plane_atomic_get_property - fetch plane property value 191 * @plane: plane to fetch property for 192 * @state: state containing the property value 193 * @property: property to look up 194 * @val: pointer to write property value into 195 * 196 * The DRM core does not store shadow copies of properties for 197 * atomic-capable drivers. This entrypoint is used to fetch 198 * the current value of a driver-specific plane property. 199 */ 200 int 201 intel_plane_atomic_get_property(struct drm_plane *plane, 202 const struct drm_plane_state *state, 203 struct drm_property *property, 204 uint64_t *val) 205 { 206 struct drm_mode_config *config = &plane->dev->mode_config; 207 208 if (property == config->rotation_property) { 209 *val = state->rotation; 210 } else { 211 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name); 212 return -EINVAL; 213 } 214 215 return 0; 216 } 217 218 /** 219 * intel_plane_atomic_set_property - set plane property value 220 * @plane: plane to set property for 221 * @state: state to update property value in 222 * @property: property to set 223 * @val: value to set property to 224 * 225 * Writes the specified property value for a plane into the provided atomic 226 * state object. 227 * 228 * Returns 0 on success, -EINVAL on unrecognized properties 229 */ 230 int 231 intel_plane_atomic_set_property(struct drm_plane *plane, 232 struct drm_plane_state *state, 233 struct drm_property *property, 234 uint64_t val) 235 { 236 struct drm_mode_config *config = &plane->dev->mode_config; 237 238 if (property == config->rotation_property) { 239 state->rotation = val; 240 } else { 241 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name); 242 return -EINVAL; 243 } 244 245 return 0; 246 } 247