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 struct intel_plane *intel_plane_alloc(void)
  40 {
  41         struct intel_plane_state *plane_state;
  42         struct intel_plane *plane;
  43
  44         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
  45         if (!plane)
  46                 return ERR_PTR(-ENOMEM);
  47
  48         plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);
  49         if (!plane_state) {
  50                 kfree(plane);
  51                 return ERR_PTR(-ENOMEM);
  52         }
  53
  54         __drm_atomic_helper_plane_reset(&plane->base, &plane_state->base);
  55         plane_state->scaler_id = -1;
  56
  57         return plane;
  58 }
  59
  60 void intel_plane_free(struct intel_plane *plane)
  61 {
  62         intel_plane_destroy_state(&plane->base, plane->base.state);
  63         kfree(plane);
  64 }
  65
  66 /**
  67  * intel_plane_duplicate_state - duplicate plane state
  68  * @plane: drm plane
  69  *
  70  * Allocates and returns a copy of the plane state (both common and
  71  * Intel-specific) for the specified plane.
  72  *
  73  * Returns: The newly allocated plane state, or NULL on failure.
  74  */
  75 struct drm_plane_state *
  76 intel_plane_duplicate_state(struct drm_plane *plane)
  77 {
  78         struct drm_plane_state *state;
  79         struct intel_plane_state *intel_state;
  80
  81         intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);
  82
  83         if (!intel_state)
  84                 return NULL;
  85
  86         state = &intel_state->base;
  87
  88         __drm_atomic_helper_plane_duplicate_state(plane, state);
  89
  90         intel_state->vma = NULL;
  91         intel_state->flags = 0;
  92
  93         return state;
  94 }
  95
  96 /**
  97  * intel_plane_destroy_state - destroy plane state
  98  * @plane: drm plane
  99  * @state: state object to destroy
 100  *
 101  * Destroys the plane state (both common and Intel-specific) for the
 102  * specified plane.
 103  */
 104 void
 105 intel_plane_destroy_state(struct drm_plane *plane,
 106                           struct drm_plane_state *state)
 107 {
 108         WARN_ON(to_intel_plane_state(state)->vma);
 109
 110         drm_atomic_helper_plane_destroy_state(plane, state);
 111 }
 112
 113 int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
 114                                         struct intel_crtc_state *crtc_state,
 115                                         const struct intel_plane_state *old_plane_state,
 116                                         struct intel_plane_state *intel_state)
 117 {
 118         struct drm_plane *plane = intel_state->base.plane;
 119         struct drm_plane_state *state = &intel_state->base;
 120         struct intel_plane *intel_plane = to_intel_plane(plane);
 121         int ret;
 122
 123         crtc_state->active_planes &= ~BIT(intel_plane->id);
 124         crtc_state->nv12_planes &= ~BIT(intel_plane->id);
 125         intel_state->base.visible = false;
 126
 127         /* If this is a cursor plane, no further checks are needed. */
 128         if (!intel_state->base.crtc && !old_plane_state->base.crtc)
 129                 return 0;
 130
 131         ret = intel_plane->check_plane(crtc_state, intel_state);
 132         if (ret)
 133                 return ret;
 134
 135         /* FIXME pre-g4x don't work like this */
 136         if (state->visible)
 137                 crtc_state->active_planes |= BIT(intel_plane->id);
 138
 139         if (state->visible && state->fb->format->format == DRM_FORMAT_NV12)
 140                 crtc_state->nv12_planes |= BIT(intel_plane->id);
 141
 142         return intel_plane_atomic_calc_changes(old_crtc_state,
 143                                                &crtc_state->base,
 144                                                old_plane_state,
 145                                                state);
 146 }
 147
 148 static int intel_plane_atomic_check(struct drm_plane *plane,
 149                                     struct drm_plane_state *new_plane_state)
 150 {
 151         struct drm_atomic_state *state = new_plane_state->state;
 152         const struct drm_plane_state *old_plane_state =
 153                 drm_atomic_get_old_plane_state(state, plane);
 154         struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
 155         const struct drm_crtc_state *old_crtc_state;
 156         struct drm_crtc_state *new_crtc_state;
 157
 158         new_plane_state->visible = false;
 159         if (!crtc)
 160                 return 0;
 161
 162         old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
 163         new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 164
 165         return intel_plane_atomic_check_with_state(to_intel_crtc_state(old_crtc_state),
 166                                                    to_intel_crtc_state(new_crtc_state),
 167                                                    to_intel_plane_state(old_plane_state),
 168                                                    to_intel_plane_state(new_plane_state));
 169 }
 170
 171 void intel_update_planes_on_crtc(struct intel_atomic_state *old_state,
 172                                  struct intel_crtc *crtc,
 173                                  struct intel_crtc_state *old_crtc_state,
 174                                  struct intel_crtc_state *new_crtc_state)
 175 {
 176         struct intel_plane_state *new_plane_state;
 177         struct intel_plane *plane;
 178         u32 update_mask;
 179         int i;
 180
 181         update_mask = old_crtc_state->active_planes;
 182         update_mask |= new_crtc_state->active_planes;
 183
 184         for_each_new_intel_plane_in_state(old_state, plane, new_plane_state, i) {
 185                 if (crtc->pipe != plane->pipe ||
 186                     !(update_mask & BIT(plane->id)))
 187                         continue;
 188
 189                 if (new_plane_state->base.visible) {
 190                         trace_intel_update_plane(&plane->base, crtc);
 191
 192                         plane->update_plane(plane, new_crtc_state, new_plane_state);
 193                 } else if (new_plane_state->slave) {
 194                         struct intel_plane *master =
 195                                 new_plane_state->linked_plane;
 196
 197                         /*
 198                          * We update the slave plane from this function because
 199                          * programming it from the master plane's update_plane
 200                          * callback runs into issues when the Y plane is
 201                          * reassigned, disabled or used by a different plane.
 202                          *
 203                          * The slave plane is updated with the master plane's
 204                          * plane_state.
 205                          */
 206                         new_plane_state =
 207                                 intel_atomic_get_new_plane_state(old_state, master);
 208
 209                         trace_intel_update_plane(&plane->base, crtc);
 210
 211                         plane->update_slave(plane, new_crtc_state, new_plane_state);
 212                 } else {
 213                         trace_intel_disable_plane(&plane->base, crtc);
 214
 215                         plane->disable_plane(plane, crtc);
 216                 }
 217         }
 218 }
 219
 220 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 221         .prepare_fb = intel_prepare_plane_fb,
 222         .cleanup_fb = intel_cleanup_plane_fb,
 223         .atomic_check = intel_plane_atomic_check,
 224 };
 225
 226 /**
 227  * intel_plane_atomic_get_property - fetch plane property value
 228  * @plane: plane to fetch property for
 229  * @state: state containing the property value
 230  * @property: property to look up
 231  * @val: pointer to write property value into
 232  *
 233  * The DRM core does not store shadow copies of properties for
 234  * atomic-capable drivers.  This entrypoint is used to fetch
 235  * the current value of a driver-specific plane property.
 236  */
 237 int
 238 intel_plane_atomic_get_property(struct drm_plane *plane,
 239                                 const struct drm_plane_state *state,
 240                                 struct drm_property *property,
 241                                 uint64_t *val)
 242 {
 243         DRM_DEBUG_KMS("Unknown property [PROP:%d:%s]\n",
 244                       property->base.id, property->name);
 245         return -EINVAL;
 246 }
 247
 248 /**
 249  * intel_plane_atomic_set_property - set plane property value
 250  * @plane: plane to set property for
 251  * @state: state to update property value in
 252  * @property: property to set
 253  * @val: value to set property to
 254  *
 255  * Writes the specified property value for a plane into the provided atomic
 256  * state object.
 257  *
 258  * Returns 0 on success, -EINVAL on unrecognized properties
 259  */
 260 int
 261 intel_plane_atomic_set_property(struct drm_plane *plane,
 262                                 struct drm_plane_state *state,
 263                                 struct drm_property *property,
 264                                 uint64_t val)
 265 {
 266         DRM_DEBUG_KMS("Unknown property [PROP:%d:%s]\n",
 267                       property->base.id, property->name);
 268         return -EINVAL;
 269 }