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         return state;
  89 }
  90
  91 /**
  92  * intel_plane_destroy_state - destroy plane state
  93  * @plane: drm plane
  94  * @state: state object to destroy
  95  *
  96  * Destroys the plane state (both common and Intel-specific) for the
  97  * specified plane.
  98  */
  99 void
 100 intel_plane_destroy_state(struct drm_plane *plane,
 101                           struct drm_plane_state *state)
 102 {
 103         drm_atomic_helper_plane_destroy_state(plane, state);
 104 }
 105
 106 static int intel_plane_atomic_check(struct drm_plane *plane,
 107                                     struct drm_plane_state *state)
 108 {
 109         struct drm_i915_private *dev_priv = to_i915(plane->dev);
 110         struct drm_crtc *crtc = state->crtc;
 111         struct intel_crtc *intel_crtc;
 112         struct intel_crtc_state *crtc_state;
 113         struct intel_plane *intel_plane = to_intel_plane(plane);
 114         struct intel_plane_state *intel_state = to_intel_plane_state(state);
 115         struct drm_crtc_state *drm_crtc_state;
 116         int ret;
 117
 118         crtc = crtc ? crtc : plane->state->crtc;
 119         intel_crtc = to_intel_crtc(crtc);
 120
 121         /*
 122          * Both crtc and plane->crtc could be NULL if we're updating a
 123          * property while the plane is disabled.  We don't actually have
 124          * anything driver-specific we need to test in that case, so
 125          * just return success.
 126          */
 127         if (!crtc)
 128                 return 0;
 129
 130         drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
 131         if (WARN_ON(!drm_crtc_state))
 132                 return -EINVAL;
 133
 134         crtc_state = to_intel_crtc_state(drm_crtc_state);
 135
 136         /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
 137         intel_state->clip.x1 = 0;
 138         intel_state->clip.y1 = 0;
 139         intel_state->clip.x2 =
 140                 crtc_state->base.enable ? crtc_state->pipe_src_w : 0;
 141         intel_state->clip.y2 =
 142                 crtc_state->base.enable ? crtc_state->pipe_src_h : 0;
 143
 144         if (state->fb && drm_rotation_90_or_270(state->rotation)) {
 145                 struct drm_format_name_buf format_name;
 146
 147                 if (state->fb->modifier != I915_FORMAT_MOD_Y_TILED &&
 148                     state->fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
 149                         DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
 150                         return -EINVAL;
 151                 }
 152
 153                 /*
 154                  * 90/270 is not allowed with RGB64 16:16:16:16,
 155                  * RGB 16-bit 5:6:5, and Indexed 8-bit.
 156                  * TBD: Add RGB64 case once its added in supported format list.
 157                  */
 158                 switch (state->fb->pixel_format) {
 159                 case DRM_FORMAT_C8:
 160                 case DRM_FORMAT_RGB565:
 161                         DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
 162                                       drm_get_format_name(state->fb->pixel_format,
 163                                                           &format_name));
 164                         return -EINVAL;
 165
 166                 default:
 167                         break;
 168                 }
 169         }
 170
 171         /* CHV ignores the mirror bit when the rotate bit is set :( */
 172         if (IS_CHERRYVIEW(dev_priv) &&
 173             state->rotation & DRM_ROTATE_180 &&
 174             state->rotation & DRM_REFLECT_X) {
 175                 DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
 176                 return -EINVAL;
 177         }
 178
 179         intel_state->base.visible = false;
 180         ret = intel_plane->check_plane(plane, crtc_state, intel_state);
 181         if (ret)
 182                 return ret;
 183
 184         return intel_plane_atomic_calc_changes(&crtc_state->base, state);
 185 }
 186
 187 static void intel_plane_atomic_update(struct drm_plane *plane,
 188                                       struct drm_plane_state *old_state)
 189 {
 190         struct intel_plane *intel_plane = to_intel_plane(plane);
 191         struct intel_plane_state *intel_state =
 192                 to_intel_plane_state(plane->state);
 193         struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
 194
 195         if (intel_state->base.visible)
 196                 intel_plane->update_plane(plane,
 197                                           to_intel_crtc_state(crtc->state),
 198                                           intel_state);
 199         else
 200                 intel_plane->disable_plane(plane, crtc);
 201 }
 202
 203 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 204         .prepare_fb = intel_prepare_plane_fb,
 205         .cleanup_fb = intel_cleanup_plane_fb,
 206         .atomic_check = intel_plane_atomic_check,
 207         .atomic_update = intel_plane_atomic_update,
 208 };
 209
 210 /**
 211  * intel_plane_atomic_get_property - fetch plane property value
 212  * @plane: plane to fetch property for
 213  * @state: state containing the property value
 214  * @property: property to look up
 215  * @val: pointer to write property value into
 216  *
 217  * The DRM core does not store shadow copies of properties for
 218  * atomic-capable drivers.  This entrypoint is used to fetch
 219  * the current value of a driver-specific plane property.
 220  */
 221 int
 222 intel_plane_atomic_get_property(struct drm_plane *plane,
 223                                 const struct drm_plane_state *state,
 224                                 struct drm_property *property,
 225                                 uint64_t *val)
 226 {
 227         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 228         return -EINVAL;
 229 }
 230
 231 /**
 232  * intel_plane_atomic_set_property - set plane property value
 233  * @plane: plane to set property for
 234  * @state: state to update property value in
 235  * @property: property to set
 236  * @val: value to set property to
 237  *
 238  * Writes the specified property value for a plane into the provided atomic
 239  * state object.
 240  *
 241  * Returns 0 on success, -EINVAL on unrecognized properties
 242  */
 243 int
 244 intel_plane_atomic_set_property(struct drm_plane *plane,
 245                                 struct drm_plane_state *state,
 246                                 struct drm_property *property,
 247                                 uint64_t val)
 248 {
 249         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 250         return -EINVAL;
 251 }