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_MODE_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         intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);
  79
  80         if (!intel_state)
  81                 return NULL;
  82
  83         state = &intel_state->base;
  84
  85         __drm_atomic_helper_plane_duplicate_state(plane, state);
  86
  87         intel_state->vma = NULL;
  88         intel_state->flags = 0;
  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         WARN_ON(to_intel_plane_state(state)->vma);
 106
 107         drm_atomic_helper_plane_destroy_state(plane, state);
 108 }
 109
 110 int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
 111                                         struct intel_crtc_state *crtc_state,
 112                                         const struct intel_plane_state *old_plane_state,
 113                                         struct intel_plane_state *intel_state)
 114 {
 115         struct drm_plane *plane = intel_state->base.plane;
 116         struct drm_plane_state *state = &intel_state->base;
 117         struct intel_plane *intel_plane = to_intel_plane(plane);
 118         int ret;
 119
 120         if (!intel_state->base.crtc && !old_plane_state->base.crtc)
 121                 return 0;
 122
 123         intel_state->base.visible = false;
 124         ret = intel_plane->check_plane(crtc_state, intel_state);
 125         if (ret)
 126                 return ret;
 127
 128         /* FIXME pre-g4x don't work like this */
 129         if (state->visible)
 130                 crtc_state->active_planes |= BIT(intel_plane->id);
 131         else
 132                 crtc_state->active_planes &= ~BIT(intel_plane->id);
 133
 134         if (state->visible && state->fb->format->format == DRM_FORMAT_NV12)
 135                 crtc_state->nv12_planes |= BIT(intel_plane->id);
 136         else
 137                 crtc_state->nv12_planes &= ~BIT(intel_plane->id);
 138
 139         return intel_plane_atomic_calc_changes(old_crtc_state,
 140                                                &crtc_state->base,
 141                                                old_plane_state,
 142                                                state);
 143 }
 144
 145 static int intel_plane_atomic_check(struct drm_plane *plane,
 146                                     struct drm_plane_state *new_plane_state)
 147 {
 148         struct drm_atomic_state *state = new_plane_state->state;
 149         const struct drm_plane_state *old_plane_state =
 150                 drm_atomic_get_old_plane_state(state, plane);
 151         struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
 152         const struct drm_crtc_state *old_crtc_state;
 153         struct drm_crtc_state *new_crtc_state;
 154
 155         if (!crtc)
 156                 return 0;
 157
 158         old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
 159         new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 160
 161         return intel_plane_atomic_check_with_state(to_intel_crtc_state(old_crtc_state),
 162                                                    to_intel_crtc_state(new_crtc_state),
 163                                                    to_intel_plane_state(old_plane_state),
 164                                                    to_intel_plane_state(new_plane_state));
 165 }
 166
 167 static void intel_plane_atomic_update(struct drm_plane *plane,
 168                                       struct drm_plane_state *old_state)
 169 {
 170         struct intel_atomic_state *state = to_intel_atomic_state(old_state->state);
 171         struct intel_plane *intel_plane = to_intel_plane(plane);
 172         const struct intel_plane_state *new_plane_state =
 173                 intel_atomic_get_new_plane_state(state, intel_plane);
 174         struct drm_crtc *crtc = new_plane_state->base.crtc ?: old_state->crtc;
 175
 176         if (new_plane_state->base.visible) {
 177                 const struct intel_crtc_state *new_crtc_state =
 178                         intel_atomic_get_new_crtc_state(state, to_intel_crtc(crtc));
 179
 180                 trace_intel_update_plane(plane,
 181                                          to_intel_crtc(crtc));
 182
 183                 intel_plane->update_plane(intel_plane,
 184                                           new_crtc_state, new_plane_state);
 185         } else {
 186                 trace_intel_disable_plane(plane,
 187                                           to_intel_crtc(crtc));
 188
 189                 intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
 190         }
 191 }
 192
 193 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 194         .prepare_fb = intel_prepare_plane_fb,
 195         .cleanup_fb = intel_cleanup_plane_fb,
 196         .atomic_check = intel_plane_atomic_check,
 197         .atomic_update = intel_plane_atomic_update,
 198 };
 199
 200 /**
 201  * intel_plane_atomic_get_property - fetch plane property value
 202  * @plane: plane to fetch property for
 203  * @state: state containing the property value
 204  * @property: property to look up
 205  * @val: pointer to write property value into
 206  *
 207  * The DRM core does not store shadow copies of properties for
 208  * atomic-capable drivers.  This entrypoint is used to fetch
 209  * the current value of a driver-specific plane property.
 210  */
 211 int
 212 intel_plane_atomic_get_property(struct drm_plane *plane,
 213                                 const struct drm_plane_state *state,
 214                                 struct drm_property *property,
 215                                 uint64_t *val)
 216 {
 217         DRM_DEBUG_KMS("Unknown property [PROP:%d:%s]\n",
 218                       property->base.id, property->name);
 219         return -EINVAL;
 220 }
 221
 222 /**
 223  * intel_plane_atomic_set_property - set plane property value
 224  * @plane: plane to set property for
 225  * @state: state to update property value in
 226  * @property: property to set
 227  * @val: value to set property to
 228  *
 229  * Writes the specified property value for a plane into the provided atomic
 230  * state object.
 231  *
 232  * Returns 0 on success, -EINVAL on unrecognized properties
 233  */
 234 int
 235 intel_plane_atomic_set_property(struct drm_plane *plane,
 236                                 struct drm_plane_state *state,
 237                                 struct drm_property *property,
 238                                 uint64_t val)
 239 {
 240         DRM_DEBUG_KMS("Unknown property [PROP:%d:%s]\n",
 241                       property->base.id, property->name);
 242         return -EINVAL;
 243 }