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 static int intel_plane_atomic_check(struct drm_plane *plane,
 127                                     struct drm_plane_state *state)
 128 {
 129         struct drm_i915_private *dev_priv = to_i915(plane->dev);
 130         struct drm_crtc *crtc = state->crtc;
 131         struct intel_crtc *intel_crtc;
 132         struct intel_crtc_state *crtc_state;
 133         struct intel_plane *intel_plane = to_intel_plane(plane);
 134         struct intel_plane_state *intel_state = to_intel_plane_state(state);
 135         struct drm_crtc_state *drm_crtc_state;
 136         int ret;
 137
 138         crtc = crtc ? crtc : plane->state->crtc;
 139         intel_crtc = to_intel_crtc(crtc);
 140
 141         /*
 142          * Both crtc and plane->crtc could be NULL if we're updating a
 143          * property while the plane is disabled.  We don't actually have
 144          * anything driver-specific we need to test in that case, so
 145          * just return success.
 146          */
 147         if (!crtc)
 148                 return 0;
 149
 150         drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
 151         if (WARN_ON(!drm_crtc_state))
 152                 return -EINVAL;
 153
 154         crtc_state = to_intel_crtc_state(drm_crtc_state);
 155
 156         /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
 157         intel_state->clip.x1 = 0;
 158         intel_state->clip.y1 = 0;
 159         intel_state->clip.x2 =
 160                 crtc_state->base.enable ? crtc_state->pipe_src_w : 0;
 161         intel_state->clip.y2 =
 162                 crtc_state->base.enable ? crtc_state->pipe_src_h : 0;
 163
 164         if (state->fb && drm_rotation_90_or_270(state->rotation)) {
 165                 struct drm_format_name_buf format_name;
 166
 167                 if (state->fb->modifier != I915_FORMAT_MOD_Y_TILED &&
 168                     state->fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
 169                         DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
 170                         return -EINVAL;
 171                 }
 172
 173                 /*
 174                  * 90/270 is not allowed with RGB64 16:16:16:16,
 175                  * RGB 16-bit 5:6:5, and Indexed 8-bit.
 176                  * TBD: Add RGB64 case once its added in supported format list.
 177                  */
 178                 switch (state->fb->pixel_format) {
 179                 case DRM_FORMAT_C8:
 180                 case DRM_FORMAT_RGB565:
 181                         DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
 182                                       drm_get_format_name(state->fb->pixel_format,
 183                                                           &format_name));
 184                         return -EINVAL;
 185
 186                 default:
 187                         break;
 188                 }
 189         }
 190
 191         /* CHV ignores the mirror bit when the rotate bit is set :( */
 192         if (IS_CHERRYVIEW(dev_priv) &&
 193             state->rotation & DRM_ROTATE_180 &&
 194             state->rotation & DRM_REFLECT_X) {
 195                 DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
 196                 return -EINVAL;
 197         }
 198
 199         intel_state->base.visible = false;
 200         ret = intel_plane->check_plane(plane, crtc_state, intel_state);
 201         if (ret)
 202                 return ret;
 203
 204         return intel_plane_atomic_calc_changes(&crtc_state->base, state);
 205 }
 206
 207 static void intel_plane_atomic_update(struct drm_plane *plane,
 208                                       struct drm_plane_state *old_state)
 209 {
 210         struct intel_plane *intel_plane = to_intel_plane(plane);
 211         struct intel_plane_state *intel_state =
 212                 to_intel_plane_state(plane->state);
 213         struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
 214
 215         if (intel_state->base.visible)
 216                 intel_plane->update_plane(plane,
 217                                           to_intel_crtc_state(crtc->state),
 218                                           intel_state);
 219         else
 220                 intel_plane->disable_plane(plane, crtc);
 221 }
 222
 223 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 224         .prepare_fb = intel_prepare_plane_fb,
 225         .cleanup_fb = intel_cleanup_plane_fb,
 226         .atomic_check = intel_plane_atomic_check,
 227         .atomic_update = intel_plane_atomic_update,
 228 };
 229
 230 /**
 231  * intel_plane_atomic_get_property - fetch plane property value
 232  * @plane: plane to fetch property for
 233  * @state: state containing the property value
 234  * @property: property to look up
 235  * @val: pointer to write property value into
 236  *
 237  * The DRM core does not store shadow copies of properties for
 238  * atomic-capable drivers.  This entrypoint is used to fetch
 239  * the current value of a driver-specific plane property.
 240  */
 241 int
 242 intel_plane_atomic_get_property(struct drm_plane *plane,
 243                                 const struct drm_plane_state *state,
 244                                 struct drm_property *property,
 245                                 uint64_t *val)
 246 {
 247         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 248         return -EINVAL;
 249 }
 250
 251 /**
 252  * intel_plane_atomic_set_property - set plane property value
 253  * @plane: plane to set property for
 254  * @state: state to update property value in
 255  * @property: property to set
 256  * @val: value to set property to
 257  *
 258  * Writes the specified property value for a plane into the provided atomic
 259  * state object.
 260  *
 261  * Returns 0 on success, -EINVAL on unrecognized properties
 262  */
 263 int
 264 intel_plane_atomic_set_property(struct drm_plane *plane,
 265                                 struct drm_plane_state *state,
 266                                 struct drm_property *property,
 267                                 uint64_t val)
 268 {
 269         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 270         return -EINVAL;
 271 }