drivers/gpu/drm/i915/intel_atomic_plane.c

   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 = DRM_ROTATE_0;
  59         state->ckey.flags = I915_SET_COLORKEY_NONE;
  60
  61         return state;
  62 }
  63
  64 /**
  65  * intel_plane_duplicate_state - duplicate plane state
  66  * @plane: drm plane
  67  *
  68  * Allocates and returns a copy of the plane state (both common and
  69  * Intel-specific) for the specified plane.
  70  *
  71  * Returns: The newly allocated plane state, or NULL on failure.
  72  */
  73 struct drm_plane_state *
  74 intel_plane_duplicate_state(struct drm_plane *plane)
  75 {
  76         struct drm_plane_state *state;
  77         struct intel_plane_state *intel_state;
  78
  79         intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);
  80
  81         if (!intel_state)
  82                 return NULL;
  83
  84         state = &intel_state->base;
  85
  86         __drm_atomic_helper_plane_duplicate_state(plane, state);
  87
  88         intel_state->vma = NULL;
  89
  90         return state;
  91 }
  92
  93 /**
  94  * intel_plane_destroy_state - destroy plane state
  95  * @plane: drm plane
  96  * @state: state object to destroy
  97  *
  98  * Destroys the plane state (both common and Intel-specific) for the
  99  * specified plane.
 100  */
 101 void
 102 intel_plane_destroy_state(struct drm_plane *plane,
 103                           struct drm_plane_state *state)
 104 {
 105         struct i915_vma *vma;
 106
 107         vma = fetch_and_zero(&to_intel_plane_state(state)->vma);
 108
 109         /*
 110          * FIXME: Normally intel_cleanup_plane_fb handles destruction of vma.
 111          * We currently don't clear all planes during driver unload, so we have
 112          * to be able to unpin vma here for now.
 113          *
 114          * Normally this can only happen during unload when kmscon is disabled
 115          * and userspace doesn't attempt to set a framebuffer at all.
 116          */
 117         if (vma) {
 118                 mutex_lock(&plane->dev->struct_mutex);
 119                 intel_unpin_fb_vma(vma);
 120                 mutex_unlock(&plane->dev->struct_mutex);
 121         }
 122
 123         drm_atomic_helper_plane_destroy_state(plane, state);
 124 }
 125
 126 int intel_plane_atomic_check_with_state(struct intel_crtc_state *crtc_state,
 127                                         struct intel_plane_state *intel_state)
 128 {
 129         struct drm_plane *plane = intel_state->base.plane;
 130         struct drm_i915_private *dev_priv = to_i915(plane->dev);
 131         struct drm_plane_state *state = &intel_state->base;
 132         struct intel_plane *intel_plane = to_intel_plane(plane);
 133         int ret;
 134
 135         /*
 136          * Both crtc and plane->crtc could be NULL if we're updating a
 137          * property while the plane is disabled.  We don't actually have
 138          * anything driver-specific we need to test in that case, so
 139          * just return success.
 140          */
 141         if (!intel_state->base.crtc && !plane->state->crtc)
 142                 return 0;
 143
 144         /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
 145         intel_state->clip.x1 = 0;
 146         intel_state->clip.y1 = 0;
 147         intel_state->clip.x2 =
 148                 crtc_state->base.enable ? crtc_state->pipe_src_w : 0;
 149         intel_state->clip.y2 =
 150                 crtc_state->base.enable ? crtc_state->pipe_src_h : 0;
 151
 152         if (state->fb && drm_rotation_90_or_270(state->rotation)) {
 153                 struct drm_format_name_buf format_name;
 154
 155                 if (state->fb->modifier != I915_FORMAT_MOD_Y_TILED &&
 156                     state->fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
 157                         DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
 158                         return -EINVAL;
 159                 }
 160
 161                 /*
 162                  * 90/270 is not allowed with RGB64 16:16:16:16,
 163                  * RGB 16-bit 5:6:5, and Indexed 8-bit.
 164                  * TBD: Add RGB64 case once its added in supported format list.
 165                  */
 166                 switch (state->fb->format->format) {
 167                 case DRM_FORMAT_C8:
 168                 case DRM_FORMAT_RGB565:
 169                         DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
 170                                       drm_get_format_name(state->fb->format->format,
 171                                                           &format_name));
 172                         return -EINVAL;
 173
 174                 default:
 175                         break;
 176                 }
 177         }
 178
 179         /* CHV ignores the mirror bit when the rotate bit is set :( */
 180         if (IS_CHERRYVIEW(dev_priv) &&
 181             state->rotation & DRM_ROTATE_180 &&
 182             state->rotation & DRM_REFLECT_X) {
 183                 DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
 184                 return -EINVAL;
 185         }
 186
 187         intel_state->base.visible = false;
 188         ret = intel_plane->check_plane(plane, crtc_state, intel_state);
 189         if (ret)
 190                 return ret;
 191
 192         /* FIXME pre-g4x don't work like this */
 193         if (intel_state->base.visible)
 194                 crtc_state->active_planes |= BIT(intel_plane->id);
 195         else
 196                 crtc_state->active_planes &= ~BIT(intel_plane->id);
 197
 198         return intel_plane_atomic_calc_changes(&crtc_state->base, state);
 199 }
 200
 201 static int intel_plane_atomic_check(struct drm_plane *plane,
 202                                     struct drm_plane_state *state)
 203 {
 204         struct drm_crtc *crtc = state->crtc;
 205         struct drm_crtc_state *drm_crtc_state;
 206
 207         crtc = crtc ? crtc : plane->state->crtc;
 208
 209         /*
 210          * Both crtc and plane->crtc could be NULL if we're updating a
 211          * property while the plane is disabled.  We don't actually have
 212          * anything driver-specific we need to test in that case, so
 213          * just return success.
 214          */
 215         if (!crtc)
 216                 return 0;
 217
 218         drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
 219         if (WARN_ON(!drm_crtc_state))
 220                 return -EINVAL;
 221
 222         return intel_plane_atomic_check_with_state(to_intel_crtc_state(drm_crtc_state),
 223                                                    to_intel_plane_state(state));
 224 }
 225
 226 static void intel_plane_atomic_update(struct drm_plane *plane,
 227                                       struct drm_plane_state *old_state)
 228 {
 229         struct intel_plane *intel_plane = to_intel_plane(plane);
 230         struct intel_plane_state *intel_state =
 231                 to_intel_plane_state(plane->state);
 232         struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
 233
 234         if (intel_state->base.visible) {
 235                 trace_intel_update_plane(plane,
 236                                          to_intel_crtc(crtc));
 237
 238                 intel_plane->update_plane(plane,
 239                                           to_intel_crtc_state(crtc->state),
 240                                           intel_state);
 241         } else {
 242                 trace_intel_disable_plane(plane,
 243                                           to_intel_crtc(crtc));
 244
 245                 intel_plane->disable_plane(plane, crtc);
 246         }
 247 }
 248
 249 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 250         .prepare_fb = intel_prepare_plane_fb,
 251         .cleanup_fb = intel_cleanup_plane_fb,
 252         .atomic_check = intel_plane_atomic_check,
 253         .atomic_update = intel_plane_atomic_update,
 254 };
 255
 256 /**
 257  * intel_plane_atomic_get_property - fetch plane property value
 258  * @plane: plane to fetch property for
 259  * @state: state containing the property value
 260  * @property: property to look up
 261  * @val: pointer to write property value into
 262  *
 263  * The DRM core does not store shadow copies of properties for
 264  * atomic-capable drivers.  This entrypoint is used to fetch
 265  * the current value of a driver-specific plane property.
 266  */
 267 int
 268 intel_plane_atomic_get_property(struct drm_plane *plane,
 269                                 const struct drm_plane_state *state,
 270                                 struct drm_property *property,
 271                                 uint64_t *val)
 272 {
 273         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 274         return -EINVAL;
 275 }
 276
 277 /**
 278  * intel_plane_atomic_set_property - set plane property value
 279  * @plane: plane to set property for
 280  * @state: state to update property value in
 281  * @property: property to set
 282  * @val: value to set property to
 283  *
 284  * Writes the specified property value for a plane into the provided atomic
 285  * state object.
 286  *
 287  * Returns 0 on success, -EINVAL on unrecognized properties
 288  */
 289 int
 290 intel_plane_atomic_set_property(struct drm_plane *plane,
 291                                 struct drm_plane_state *state,
 292                                 struct drm_property *property,
 293                                 uint64_t val)
 294 {
 295         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 296         return -EINVAL;
 297 }