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_i915_private *dev_priv = to_i915(plane->dev);
 117         struct drm_plane_state *state = &intel_state->base;
 118         struct intel_plane *intel_plane = to_intel_plane(plane);
 119         const struct drm_display_mode *adjusted_mode =
 120                 &crtc_state->base.adjusted_mode;
 121         int ret;
 122
 123         /*
 124          * Both crtc and plane->crtc could be NULL if we're updating a
 125          * property while the plane is disabled.  We don't actually have
 126          * anything driver-specific we need to test in that case, so
 127          * just return success.
 128          */
 129         if (!intel_state->base.crtc && !old_plane_state->base.crtc)
 130                 return 0;
 131
 132         if (state->fb && drm_rotation_90_or_270(state->rotation)) {
 133                 struct drm_format_name_buf format_name;
 134
 135                 if (state->fb->modifier != I915_FORMAT_MOD_Y_TILED &&
 136                     state->fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
 137                         DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
 138                         return -EINVAL;
 139                 }
 140
 141                 /*
 142                  * 90/270 is not allowed with RGB64 16:16:16:16,
 143                  * RGB 16-bit 5:6:5, and Indexed 8-bit.
 144                  * TBD: Add RGB64 case once its added in supported format list.
 145                  */
 146                 switch (state->fb->format->format) {
 147                 case DRM_FORMAT_C8:
 148                 case DRM_FORMAT_RGB565:
 149                         DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
 150                                       drm_get_format_name(state->fb->format->format,
 151                                                           &format_name));
 152                         return -EINVAL;
 153
 154                 default:
 155                         break;
 156                 }
 157         }
 158
 159         /* CHV ignores the mirror bit when the rotate bit is set :( */
 160         if (IS_CHERRYVIEW(dev_priv) &&
 161             state->rotation & DRM_MODE_ROTATE_180 &&
 162             state->rotation & DRM_MODE_REFLECT_X) {
 163                 DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
 164                 return -EINVAL;
 165         }
 166
 167         intel_state->base.visible = false;
 168         ret = intel_plane->check_plane(intel_plane, crtc_state, intel_state);
 169         if (ret)
 170                 return ret;
 171
 172         /*
 173          * Y-tiling is not supported in IF-ID Interlace mode in
 174          * GEN9 and above.
 175          */
 176         if (state->fb && INTEL_GEN(dev_priv) >= 9 && crtc_state->base.enable &&
 177             adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
 178                 if (state->fb->modifier == I915_FORMAT_MOD_Y_TILED ||
 179                     state->fb->modifier == I915_FORMAT_MOD_Yf_TILED) {
 180                         DRM_DEBUG_KMS("Y/Yf tiling not supported in IF-ID mode\n");
 181                         return -EINVAL;
 182                 }
 183         }
 184
 185         /* FIXME pre-g4x don't work like this */
 186         if (intel_state->base.visible)
 187                 crtc_state->active_planes |= BIT(intel_plane->id);
 188         else
 189                 crtc_state->active_planes &= ~BIT(intel_plane->id);
 190
 191         return intel_plane_atomic_calc_changes(old_crtc_state,
 192                                                &crtc_state->base,
 193                                                old_plane_state,
 194                                                state);
 195 }
 196
 197 static int intel_plane_atomic_check(struct drm_plane *plane,
 198                                     struct drm_plane_state *new_plane_state)
 199 {
 200         struct drm_atomic_state *state = new_plane_state->state;
 201         const struct drm_plane_state *old_plane_state =
 202                 drm_atomic_get_old_plane_state(state, plane);
 203         struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
 204         const struct drm_crtc_state *old_crtc_state;
 205         struct drm_crtc_state *new_crtc_state;
 206
 207         /*
 208          * Both crtc and plane->crtc could be NULL if we're updating a
 209          * property while the plane is disabled.  We don't actually have
 210          * anything driver-specific we need to test in that case, so
 211          * just return success.
 212          */
 213         if (!crtc)
 214                 return 0;
 215
 216         old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
 217         new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 218
 219         return intel_plane_atomic_check_with_state(to_intel_crtc_state(old_crtc_state),
 220                                                    to_intel_crtc_state(new_crtc_state),
 221                                                    to_intel_plane_state(old_plane_state),
 222                                                    to_intel_plane_state(new_plane_state));
 223 }
 224
 225 static void intel_plane_atomic_update(struct drm_plane *plane,
 226                                       struct drm_plane_state *old_state)
 227 {
 228         struct intel_atomic_state *state = to_intel_atomic_state(old_state->state);
 229         struct intel_plane *intel_plane = to_intel_plane(plane);
 230         const struct intel_plane_state *new_plane_state =
 231                 intel_atomic_get_new_plane_state(state, intel_plane);
 232         struct drm_crtc *crtc = new_plane_state->base.crtc ?: old_state->crtc;
 233
 234         if (new_plane_state->base.visible) {
 235                 const struct intel_crtc_state *new_crtc_state =
 236                         intel_atomic_get_new_crtc_state(state, to_intel_crtc(crtc));
 237
 238                 trace_intel_update_plane(plane,
 239                                          to_intel_crtc(crtc));
 240
 241                 intel_plane->update_plane(intel_plane,
 242                                           new_crtc_state, new_plane_state);
 243         } else {
 244                 trace_intel_disable_plane(plane,
 245                                           to_intel_crtc(crtc));
 246
 247                 intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
 248         }
 249 }
 250
 251 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 252         .prepare_fb = intel_prepare_plane_fb,
 253         .cleanup_fb = intel_cleanup_plane_fb,
 254         .atomic_check = intel_plane_atomic_check,
 255         .atomic_update = intel_plane_atomic_update,
 256 };
 257
 258 /**
 259  * intel_plane_atomic_get_property - fetch plane property value
 260  * @plane: plane to fetch property for
 261  * @state: state containing the property value
 262  * @property: property to look up
 263  * @val: pointer to write property value into
 264  *
 265  * The DRM core does not store shadow copies of properties for
 266  * atomic-capable drivers.  This entrypoint is used to fetch
 267  * the current value of a driver-specific plane property.
 268  */
 269 int
 270 intel_plane_atomic_get_property(struct drm_plane *plane,
 271                                 const struct drm_plane_state *state,
 272                                 struct drm_property *property,
 273                                 uint64_t *val)
 274 {
 275         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 276         return -EINVAL;
 277 }
 278
 279 /**
 280  * intel_plane_atomic_set_property - set plane property value
 281  * @plane: plane to set property for
 282  * @state: state to update property value in
 283  * @property: property to set
 284  * @val: value to set property to
 285  *
 286  * Writes the specified property value for a plane into the provided atomic
 287  * state object.
 288  *
 289  * Returns 0 on success, -EINVAL on unrecognized properties
 290  */
 291 int
 292 intel_plane_atomic_set_property(struct drm_plane *plane,
 293                                 struct drm_plane_state *state,
 294                                 struct drm_property *property,
 295                                 uint64_t val)
 296 {
 297         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 298         return -EINVAL;
 299 }