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 89 __drm_atomic_helper_plane_duplicate_state(plane, state); 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_crtc_state *crtc_state; 115 struct intel_plane *intel_plane = to_intel_plane(plane); 116 struct intel_plane_state *intel_state = to_intel_plane_state(state); 117 118 crtc = crtc ? crtc : plane->crtc; 119 intel_crtc = to_intel_crtc(crtc); 120 121 /* 122 * Both crtc and plane->crtc could be NULL if we're updating a 123 * property while the plane is disabled. We don't actually have 124 * anything driver-specific we need to test in that case, so 125 * just return success. 126 */ 127 if (!crtc) 128 return 0; 129 130 /* FIXME: temporary hack necessary while we still use the plane update 131 * helper. */ 132 if (state->state) { 133 crtc_state = 134 intel_atomic_get_crtc_state(state->state, intel_crtc); 135 if (IS_ERR(crtc_state)) 136 return PTR_ERR(crtc_state); 137 } else { 138 crtc_state = intel_crtc->config; 139 } 140 141 /* 142 * The original src/dest coordinates are stored in state->base, but 143 * we want to keep another copy internal to our driver that we can 144 * clip/modify ourselves. 145 */ 146 intel_state->src.x1 = state->src_x; 147 intel_state->src.y1 = state->src_y; 148 intel_state->src.x2 = state->src_x + state->src_w; 149 intel_state->src.y2 = state->src_y + state->src_h; 150 intel_state->dst.x1 = state->crtc_x; 151 intel_state->dst.y1 = state->crtc_y; 152 intel_state->dst.x2 = state->crtc_x + state->crtc_w; 153 intel_state->dst.y2 = state->crtc_y + state->crtc_h; 154 155 /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */ 156 intel_state->clip.x1 = 0; 157 intel_state->clip.y1 = 0; 158 intel_state->clip.x2 = 159 crtc_state->base.active ? crtc_state->pipe_src_w : 0; 160 intel_state->clip.y2 = 161 crtc_state->base.active ? crtc_state->pipe_src_h : 0; 162 163 /* 164 * Disabling a plane is always okay; we just need to update 165 * fb tracking in a special way since cleanup_fb() won't 166 * get called by the plane helpers. 167 */ 168 if (state->fb == NULL && plane->state->fb != NULL) { 169 /* 170 * 'prepare' is never called when plane is being disabled, so 171 * we need to handle frontbuffer tracking as a special case 172 */ 173 intel_crtc->atomic.disabled_planes |= 174 (1 << drm_plane_index(plane)); 175 } 176 177 if (state->fb && intel_rotation_90_or_270(state->rotation)) { 178 if (!(state->fb->modifier[0] == I915_FORMAT_MOD_Y_TILED || 179 state->fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED)) { 180 DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n"); 181 return -EINVAL; 182 } 183 184 /* 185 * 90/270 is not allowed with RGB64 16:16:16:16, 186 * RGB 16-bit 5:6:5, and Indexed 8-bit. 187 * TBD: Add RGB64 case once its added in supported format list. 188 */ 189 switch (state->fb->pixel_format) { 190 case DRM_FORMAT_C8: 191 case DRM_FORMAT_RGB565: 192 DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n", 193 drm_get_format_name(state->fb->pixel_format)); 194 return -EINVAL; 195 196 default: 197 break; 198 } 199 } 200 201 return intel_plane->check_plane(plane, intel_state); 202 } 203 204 static void intel_plane_atomic_update(struct drm_plane *plane, 205 struct drm_plane_state *old_state) 206 { 207 struct intel_plane *intel_plane = to_intel_plane(plane); 208 struct intel_plane_state *intel_state = 209 to_intel_plane_state(plane->state); 210 211 intel_plane->commit_plane(plane, intel_state); 212 } 213 214 const struct drm_plane_helper_funcs intel_plane_helper_funcs = { 215 .prepare_fb = intel_prepare_plane_fb, 216 .cleanup_fb = intel_cleanup_plane_fb, 217 .atomic_check = intel_plane_atomic_check, 218 .atomic_update = intel_plane_atomic_update, 219 }; 220 221 /** 222 * intel_plane_atomic_get_property - fetch plane property value 223 * @plane: plane to fetch property for 224 * @state: state containing the property value 225 * @property: property to look up 226 * @val: pointer to write property value into 227 * 228 * The DRM core does not store shadow copies of properties for 229 * atomic-capable drivers. This entrypoint is used to fetch 230 * the current value of a driver-specific plane property. 231 */ 232 int 233 intel_plane_atomic_get_property(struct drm_plane *plane, 234 const struct drm_plane_state *state, 235 struct drm_property *property, 236 uint64_t *val) 237 { 238 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name); 239 return -EINVAL; 240 } 241 242 /** 243 * intel_plane_atomic_set_property - set plane property value 244 * @plane: plane to set property for 245 * @state: state to update property value in 246 * @property: property to set 247 * @val: value to set property to 248 * 249 * Writes the specified property value for a plane into the provided atomic 250 * state object. 251 * 252 * Returns 0 on success, -EINVAL on unrecognized properties 253 */ 254 int 255 intel_plane_atomic_set_property(struct drm_plane *plane, 256 struct drm_plane_state *state, 257 struct drm_property *property, 258 uint64_t val) 259 { 260 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name); 261 return -EINVAL; 262 } 263