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 = BIT(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         if (WARN_ON(!plane->state))
  80                 intel_state = intel_create_plane_state(plane);
  81         else
  82                 intel_state = kmemdup(plane->state, sizeof(*intel_state),
  83                                       GFP_KERNEL);
  84
  85         if (!intel_state)
  86                 return NULL;
  87
  88         state = &intel_state->base;
  89
  90         __drm_atomic_helper_plane_duplicate_state(plane, state);
  91
  92         return state;
  93 }
  94
  95 /**
  96  * intel_plane_destroy_state - destroy plane state
  97  * @plane: drm plane
  98  * @state: state object to destroy
  99  *
 100  * Destroys the plane state (both common and Intel-specific) for the
 101  * specified plane.
 102  */
 103 void
 104 intel_plane_destroy_state(struct drm_plane *plane,
 105                           struct drm_plane_state *state)
 106 {
 107         drm_atomic_helper_plane_destroy_state(plane, state);
 108 }
 109
 110 static int intel_plane_atomic_check(struct drm_plane *plane,
 111                                     struct drm_plane_state *state)
 112 {
 113         struct drm_crtc *crtc = state->crtc;
 114         struct intel_crtc *intel_crtc;
 115         struct intel_crtc_state *crtc_state;
 116         struct intel_plane *intel_plane = to_intel_plane(plane);
 117         struct intel_plane_state *intel_state = to_intel_plane_state(state);
 118         int ret;
 119
 120         crtc = crtc ? crtc : plane->state->crtc;
 121         intel_crtc = to_intel_crtc(crtc);
 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 (!crtc)
 130                 return 0;
 131
 132         /* FIXME: temporary hack necessary while we still use the plane update
 133          * helper. */
 134         if (state->state) {
 135                 struct drm_crtc_state *drm_crtc_state =
 136                         drm_atomic_get_existing_crtc_state(state->state, crtc);
 137
 138                 if (WARN_ON(!drm_crtc_state))
 139                         return -EINVAL;
 140
 141                 crtc_state = to_intel_crtc_state(drm_crtc_state);
 142         } else {
 143                 crtc_state = intel_crtc->config;
 144         }
 145
 146         /*
 147          * The original src/dest coordinates are stored in state->base, but
 148          * we want to keep another copy internal to our driver that we can
 149          * clip/modify ourselves.
 150          */
 151         intel_state->src.x1 = state->src_x;
 152         intel_state->src.y1 = state->src_y;
 153         intel_state->src.x2 = state->src_x + state->src_w;
 154         intel_state->src.y2 = state->src_y + state->src_h;
 155         intel_state->dst.x1 = state->crtc_x;
 156         intel_state->dst.y1 = state->crtc_y;
 157         intel_state->dst.x2 = state->crtc_x + state->crtc_w;
 158         intel_state->dst.y2 = state->crtc_y + state->crtc_h;
 159
 160         /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
 161         intel_state->clip.x1 = 0;
 162         intel_state->clip.y1 = 0;
 163         intel_state->clip.x2 =
 164                 crtc_state->base.active ? crtc_state->pipe_src_w : 0;
 165         intel_state->clip.y2 =
 166                 crtc_state->base.active ? crtc_state->pipe_src_h : 0;
 167
 168         if (state->fb && intel_rotation_90_or_270(state->rotation)) {
 169                 if (!(state->fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
 170                         state->fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED)) {
 171                         DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
 172                         return -EINVAL;
 173                 }
 174
 175                 /*
 176                  * 90/270 is not allowed with RGB64 16:16:16:16,
 177                  * RGB 16-bit 5:6:5, and Indexed 8-bit.
 178                  * TBD: Add RGB64 case once its added in supported format list.
 179                  */
 180                 switch (state->fb->pixel_format) {
 181                 case DRM_FORMAT_C8:
 182                 case DRM_FORMAT_RGB565:
 183                         DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
 184                                         drm_get_format_name(state->fb->pixel_format));
 185                         return -EINVAL;
 186
 187                 default:
 188                         break;
 189                 }
 190         }
 191
 192         intel_state->visible = false;
 193         ret = intel_plane->check_plane(plane, crtc_state, intel_state);
 194         if (ret || !state->state)
 195                 return ret;
 196
 197         return intel_plane_atomic_calc_changes(&crtc_state->base, state);
 198 }
 199
 200 static void intel_plane_atomic_update(struct drm_plane *plane,
 201                                       struct drm_plane_state *old_state)
 202 {
 203         struct intel_plane *intel_plane = to_intel_plane(plane);
 204         struct intel_plane_state *intel_state =
 205                 to_intel_plane_state(plane->state);
 206
 207         intel_plane->commit_plane(plane, intel_state);
 208 }
 209
 210 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 211         .prepare_fb = intel_prepare_plane_fb,
 212         .cleanup_fb = intel_cleanup_plane_fb,
 213         .atomic_check = intel_plane_atomic_check,
 214         .atomic_update = intel_plane_atomic_update,
 215 };
 216
 217 /**
 218  * intel_plane_atomic_get_property - fetch plane property value
 219  * @plane: plane to fetch property for
 220  * @state: state containing the property value
 221  * @property: property to look up
 222  * @val: pointer to write property value into
 223  *
 224  * The DRM core does not store shadow copies of properties for
 225  * atomic-capable drivers.  This entrypoint is used to fetch
 226  * the current value of a driver-specific plane property.
 227  */
 228 int
 229 intel_plane_atomic_get_property(struct drm_plane *plane,
 230                                 const struct drm_plane_state *state,
 231                                 struct drm_property *property,
 232                                 uint64_t *val)
 233 {
 234         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 235         return -EINVAL;
 236 }
 237
 238 /**
 239  * intel_plane_atomic_set_property - set plane property value
 240  * @plane: plane to set property for
 241  * @state: state to update property value in
 242  * @property: property to set
 243  * @val: value to set property to
 244  *
 245  * Writes the specified property value for a plane into the provided atomic
 246  * state object.
 247  *
 248  * Returns 0 on success, -EINVAL on unrecognized properties
 249  */
 250 int
 251 intel_plane_atomic_set_property(struct drm_plane *plane,
 252                                 struct drm_plane_state *state,
 253                                 struct drm_property *property,
 254                                 uint64_t val)
 255 {
 256         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 257         return -EINVAL;
 258 }