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         intel_state->wait_req = NULL;
  88
  89         return state;
  90 }
  91
  92 /**
  93  * intel_plane_destroy_state - destroy plane state
  94  * @plane: drm plane
  95  * @state: state object to destroy
  96  *
  97  * Destroys the plane state (both common and Intel-specific) for the
  98  * specified plane.
  99  */
 100 void
 101 intel_plane_destroy_state(struct drm_plane *plane,
 102                           struct drm_plane_state *state)
 103 {
 104         WARN_ON(state && to_intel_plane_state(state)->wait_req);
 105         drm_atomic_helper_plane_destroy_state(plane, state);
 106 }
 107
 108 static int intel_plane_atomic_check(struct drm_plane *plane,
 109                                     struct drm_plane_state *state)
 110 {
 111         struct drm_crtc *crtc = state->crtc;
 112         struct intel_crtc *intel_crtc;
 113         struct intel_crtc_state *crtc_state;
 114         struct intel_plane *intel_plane = to_intel_plane(plane);
 115         struct intel_plane_state *intel_state = to_intel_plane_state(state);
 116         struct drm_crtc_state *drm_crtc_state;
 117         int ret;
 118
 119         crtc = crtc ? crtc : plane->state->crtc;
 120         intel_crtc = to_intel_crtc(crtc);
 121
 122         /*
 123          * Both crtc and plane->crtc could be NULL if we're updating a
 124          * property while the plane is disabled.  We don't actually have
 125          * anything driver-specific we need to test in that case, so
 126          * just return success.
 127          */
 128         if (!crtc)
 129                 return 0;
 130
 131         drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
 132         if (WARN_ON(!drm_crtc_state))
 133                 return -EINVAL;
 134
 135         crtc_state = to_intel_crtc_state(drm_crtc_state);
 136
 137         /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
 138         intel_state->clip.x1 = 0;
 139         intel_state->clip.y1 = 0;
 140         intel_state->clip.x2 =
 141                 crtc_state->base.enable ? crtc_state->pipe_src_w : 0;
 142         intel_state->clip.y2 =
 143                 crtc_state->base.enable ? crtc_state->pipe_src_h : 0;
 144
 145         if (state->fb && intel_rotation_90_or_270(state->rotation)) {
 146                 char *format_name;
 147                 if (!(state->fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
 148                         state->fb->modifier[0] == 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                         format_name = drm_get_format_name(state->fb->pixel_format);
 162                         DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n", format_name);
 163                         kfree(format_name);
 164                         return -EINVAL;
 165
 166                 default:
 167                         break;
 168                 }
 169         }
 170
 171         intel_state->base.visible = false;
 172         ret = intel_plane->check_plane(plane, crtc_state, intel_state);
 173         if (ret)
 174                 return ret;
 175
 176         return intel_plane_atomic_calc_changes(&crtc_state->base, state);
 177 }
 178
 179 static void intel_plane_atomic_update(struct drm_plane *plane,
 180                                       struct drm_plane_state *old_state)
 181 {
 182         struct intel_plane *intel_plane = to_intel_plane(plane);
 183         struct intel_plane_state *intel_state =
 184                 to_intel_plane_state(plane->state);
 185         struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
 186
 187         if (intel_state->base.visible)
 188                 intel_plane->update_plane(plane,
 189                                           to_intel_crtc_state(crtc->state),
 190                                           intel_state);
 191         else
 192                 intel_plane->disable_plane(plane, crtc);
 193 }
 194
 195 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
 196         .prepare_fb = intel_prepare_plane_fb,
 197         .cleanup_fb = intel_cleanup_plane_fb,
 198         .atomic_check = intel_plane_atomic_check,
 199         .atomic_update = intel_plane_atomic_update,
 200 };
 201
 202 /**
 203  * intel_plane_atomic_get_property - fetch plane property value
 204  * @plane: plane to fetch property for
 205  * @state: state containing the property value
 206  * @property: property to look up
 207  * @val: pointer to write property value into
 208  *
 209  * The DRM core does not store shadow copies of properties for
 210  * atomic-capable drivers.  This entrypoint is used to fetch
 211  * the current value of a driver-specific plane property.
 212  */
 213 int
 214 intel_plane_atomic_get_property(struct drm_plane *plane,
 215                                 const struct drm_plane_state *state,
 216                                 struct drm_property *property,
 217                                 uint64_t *val)
 218 {
 219         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 220         return -EINVAL;
 221 }
 222
 223 /**
 224  * intel_plane_atomic_set_property - set plane property value
 225  * @plane: plane to set property for
 226  * @state: state to update property value in
 227  * @property: property to set
 228  * @val: value to set property to
 229  *
 230  * Writes the specified property value for a plane into the provided atomic
 231  * state object.
 232  *
 233  * Returns 0 on success, -EINVAL on unrecognized properties
 234  */
 235 int
 236 intel_plane_atomic_set_property(struct drm_plane *plane,
 237                                 struct drm_plane_state *state,
 238                                 struct drm_property *property,
 239                                 uint64_t val)
 240 {
 241         DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
 242         return -EINVAL;
 243 }