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         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         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(struct intel_crtc_state *crtc_state,
 111                                         struct intel_plane_state *intel_state)
 112 {
 113         struct drm_plane *plane = intel_state->base.plane;
 114         struct drm_i915_private *dev_priv = to_i915(plane->dev);
 115         struct drm_plane_state *state = &intel_state->base;
 116         struct intel_plane *intel_plane = to_intel_plane(plane);
 117         int ret;
 118
 119         /*
 120          * Both crtc and plane->crtc could be NULL if we're updating a
 121          * property while the plane is disabled.  We don't actually have
 122          * anything driver-specific we need to test in that case, so
 123          * just return success.
 124          */
 125         if (!intel_state->base.crtc && !plane->state->crtc)
 126                 return 0;
 127
 128         /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
 129         intel_state->clip.x1 = 0;
 130         intel_state->clip.y1 = 0;
 131         intel_state->clip.x2 =
 132                 crtc_state->base.enable ? crtc_state->pipe_src_w : 0;
 133         intel_state->clip.y2 =
 134                 crtc_state->base.enable ? crtc_state->pipe_src_h : 0;
 135
 136         if (state->fb && drm_rotation_90_or_270(state->rotation)) {
 137                 struct drm_format_name_buf format_name;
 138
 139                 if (state->fb->modifier != I915_FORMAT_MOD_Y_TILED &&
 140                     state->fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
 141                         DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
 142                         return -EINVAL;
 143                 }
 144
 145                 /*
 146                  * 90/270 is not allowed with RGB64 16:16:16:16,
 147                  * RGB 16-bit 5:6:5, and Indexed 8-bit.
 148                  * TBD: Add RGB64 case once its added in supported format list.
 149                  */
 150                 switch (state->fb->format->format) {
 151                 case DRM_FORMAT_C8:
 152                 case DRM_FORMAT_RGB565:
 153                         DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
 154                                       drm_get_format_name(state->fb->format->format,
 155                                                           &format_name));
 156                         return -EINVAL;
 157
 158                 default:
 159                         break;
 160                 }
 161         }
 162
 163         /* CHV ignores the mirror bit when the rotate bit is set :( */
 164         if (IS_CHERRYVIEW(dev_priv) &&
 165             state->rotation & DRM_MODE_ROTATE_180 &&
 166             state->rotation & DRM_MODE_REFLECT_X) {
 167                 DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
 168                 return -EINVAL;
 169         }
 170
 171         intel_state->base.visible = false;
 172         ret = intel_plane->check_plane(intel_plane, crtc_state, intel_state);
 173         if (ret)
 174                 return ret;
 175
 176         /* FIXME pre-g4x don't work like this */
 177         if (intel_state->base.visible)
 178                 crtc_state->active_planes |= BIT(intel_plane->id);
 179         else
 180                 crtc_state->active_planes &= ~BIT(intel_plane->id);
 181
 182         return intel_plane_atomic_calc_changes(&crtc_state->base, state);
 183 }
 184
 185 static int intel_plane_atomic_check(struct drm_plane *plane,
 186                                     struct drm_plane_state *state)
 187 {
 188         struct drm_crtc *crtc = state->crtc;
 189         struct drm_crtc_state *drm_crtc_state;
 190
 191         crtc = crtc ? crtc : plane->state->crtc;
 192
 193         /*
 194          * Both crtc and plane->crtc could be NULL if we're updating a
 195          * property while the plane is disabled.  We don't actually have
 196          * anything driver-specific we need to test in that case, so
 197          * just return success.
 198          */
 199         if (!crtc)
 200                 return 0;
 201
 202         drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
 203         if (WARN_ON(!drm_crtc_state))
 204                 return -EINVAL;
 205
 206         return intel_plane_atomic_check_with_state(to_intel_crtc_state(drm_crtc_state),
 207                                                    to_intel_plane_state(state));
 208 }
 209
 210 static void intel_plane_atomic_update(struct drm_plane *plane,
 211                                       struct drm_plane_state *old_state)
 212 {
 213         struct intel_plane *intel_plane = to_intel_plane(plane);
 214         struct intel_plane_state *intel_state =
 215                 to_intel_plane_state(plane->state);
 216         struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
 217
 218         if (intel_state->base.visible) {
 219                 trace_intel_update_plane(plane,
 220                                          to_intel_crtc(crtc));
 221
 222                 intel_plane->update_plane(intel_plane,
 223                                           to_intel_crtc_state(crtc->state),
 224                                           intel_state);
 225         } else {
 226                 trace_intel_disable_plane(plane,
 227                                           to_intel_crtc(crtc));
 228
 229                 intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
 230         }
 231 }
 232
 233 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 234         .prepare_fb = intel_prepare_plane_fb,
 235         .cleanup_fb = intel_cleanup_plane_fb,
 236         .atomic_check = intel_plane_atomic_check,
 237         .atomic_update = intel_plane_atomic_update,
 238 };
 239
 240 /**
 241  * intel_plane_atomic_get_property - fetch plane property value
 242  * @plane: plane to fetch property for
 243  * @state: state containing the property value
 244  * @property: property to look up
 245  * @val: pointer to write property value into
 246  *
 247  * The DRM core does not store shadow copies of properties for
 248  * atomic-capable drivers.  This entrypoint is used to fetch
 249  * the current value of a driver-specific plane property.
 250  */
 251 int
 252 intel_plane_atomic_get_property(struct drm_plane *plane,
 253                                 const struct drm_plane_state *state,
 254                                 struct drm_property *property,
 255                                 uint64_t *val)
 256 {
 257         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 258         return -EINVAL;
 259 }
 260
 261 /**
 262  * intel_plane_atomic_set_property - set plane property value
 263  * @plane: plane to set property for
 264  * @state: state to update property value in
 265  * @property: property to set
 266  * @val: value to set property to
 267  *
 268  * Writes the specified property value for a plane into the provided atomic
 269  * state object.
 270  *
 271  * Returns 0 on success, -EINVAL on unrecognized properties
 272  */
 273 int
 274 intel_plane_atomic_set_property(struct drm_plane *plane,
 275                                 struct drm_plane_state *state,
 276                                 struct drm_property *property,
 277                                 uint64_t val)
 278 {
 279         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 280         return -EINVAL;
 281 }