drivers/gpu/drm/mediatek/mtk_drm_plane.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015 MediaTek Inc.
   4  * Author: CK Hu <[email protected]>
   5  */
   6
   7 #include <drm/drm_atomic.h>
   8 #include <drm/drm_atomic_helper.h>
   9 #include <drm/drm_atomic_uapi.h>
  10 #include <drm/drm_blend.h>
  11 #include <drm/drm_fourcc.h>
  12 #include <drm/drm_framebuffer.h>
  13 #include <drm/drm_gem_atomic_helper.h>
  14 #include <drm/drm_plane_helper.h>
  15
  16 #include "mtk_drm_crtc.h"
  17 #include "mtk_drm_ddp_comp.h"
  18 #include "mtk_drm_drv.h"
  19 #include "mtk_drm_gem.h"
  20 #include "mtk_drm_plane.h"
  21
  22 static const u32 formats[] = {
  23         DRM_FORMAT_XRGB8888,
  24         DRM_FORMAT_ARGB8888,
  25         DRM_FORMAT_BGRX8888,
  26         DRM_FORMAT_BGRA8888,
  27         DRM_FORMAT_ABGR8888,
  28         DRM_FORMAT_XBGR8888,
  29         DRM_FORMAT_RGB888,
  30         DRM_FORMAT_BGR888,
  31         DRM_FORMAT_RGB565,
  32         DRM_FORMAT_UYVY,
  33         DRM_FORMAT_YUYV,
  34 };
  35
  36 static void mtk_plane_reset(struct drm_plane *plane)
  37 {
  38         struct mtk_plane_state *state;
  39
  40         if (plane->state) {
  41                 __drm_atomic_helper_plane_destroy_state(plane->state);
  42
  43                 state = to_mtk_plane_state(plane->state);
  44                 memset(state, 0, sizeof(*state));
  45         } else {
  46                 state = kzalloc(sizeof(*state), GFP_KERNEL);
  47                 if (!state)
  48                         return;
  49         }
  50
  51         __drm_atomic_helper_plane_reset(plane, &state->base);
  52
  53         state->base.plane = plane;
  54         state->pending.format = DRM_FORMAT_RGB565;
  55 }
  56
  57 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
  58 {
  59         struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
  60         struct mtk_plane_state *state;
  61
  62         state = kmalloc(sizeof(*state), GFP_KERNEL);
  63         if (!state)
  64                 return NULL;
  65
  66         __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
  67
  68         WARN_ON(state->base.plane != plane);
  69
  70         state->pending = old_state->pending;
  71
  72         return &state->base;
  73 }
  74
  75 static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
  76                                         struct drm_plane_state *state)
  77 {
  78         __drm_atomic_helper_plane_destroy_state(state);
  79         kfree(to_mtk_plane_state(state));
  80 }
  81
  82 static int mtk_plane_atomic_async_check(struct drm_plane *plane,
  83                                         struct drm_atomic_state *state)
  84 {
  85         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
  86                                                                                  plane);
  87         struct drm_crtc_state *crtc_state;
  88         int ret;
  89
  90         if (plane != new_plane_state->crtc->cursor)
  91                 return -EINVAL;
  92
  93         if (!plane->state)
  94                 return -EINVAL;
  95
  96         if (!plane->state->fb)
  97                 return -EINVAL;
  98
  99         ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
 100                                        to_mtk_plane_state(new_plane_state));
 101         if (ret)
 102                 return ret;
 103
 104         if (state)
 105                 crtc_state = drm_atomic_get_existing_crtc_state(state,
 106                                                                 new_plane_state->crtc);
 107         else /* Special case for asynchronous cursor updates. */
 108                 crtc_state = new_plane_state->crtc->state;
 109
 110         return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
 111                                                    DRM_PLANE_HELPER_NO_SCALING,
 112                                                    DRM_PLANE_HELPER_NO_SCALING,
 113                                                    true, true);
 114 }
 115
 116 static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
 117                                        struct mtk_plane_state *mtk_plane_state)
 118 {
 119         struct drm_framebuffer *fb = new_state->fb;
 120         struct drm_gem_object *gem;
 121         struct mtk_drm_gem_obj *mtk_gem;
 122         unsigned int pitch, format;
 123         dma_addr_t addr;
 124
 125         gem = fb->obj[0];
 126         mtk_gem = to_mtk_gem_obj(gem);
 127         addr = mtk_gem->dma_addr;
 128         pitch = fb->pitches[0];
 129         format = fb->format->format;
 130
 131         addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
 132         addr += (new_state->src.y1 >> 16) * pitch;
 133
 134         mtk_plane_state->pending.enable = true;
 135         mtk_plane_state->pending.pitch = pitch;
 136         mtk_plane_state->pending.format = format;
 137         mtk_plane_state->pending.addr = addr;
 138         mtk_plane_state->pending.x = new_state->dst.x1;
 139         mtk_plane_state->pending.y = new_state->dst.y1;
 140         mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
 141         mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
 142         mtk_plane_state->pending.rotation = new_state->rotation;
 143         mtk_plane_state->pending.color_encoding = new_state->color_encoding;
 144 }
 145
 146 static void mtk_plane_atomic_async_update(struct drm_plane *plane,
 147                                           struct drm_atomic_state *state)
 148 {
 149         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 150                                                                            plane);
 151         struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
 152
 153         plane->state->crtc_x = new_state->crtc_x;
 154         plane->state->crtc_y = new_state->crtc_y;
 155         plane->state->crtc_h = new_state->crtc_h;
 156         plane->state->crtc_w = new_state->crtc_w;
 157         plane->state->src_x = new_state->src_x;
 158         plane->state->src_y = new_state->src_y;
 159         plane->state->src_h = new_state->src_h;
 160         plane->state->src_w = new_state->src_w;
 161         swap(plane->state->fb, new_state->fb);
 162
 163         mtk_plane_update_new_state(new_state, new_plane_state);
 164         wmb(); /* Make sure the above parameters are set before update */
 165         new_plane_state->pending.async_dirty = true;
 166         mtk_drm_crtc_async_update(new_state->crtc, plane, state);
 167 }
 168
 169 static const struct drm_plane_funcs mtk_plane_funcs = {
 170         .update_plane = drm_atomic_helper_update_plane,
 171         .disable_plane = drm_atomic_helper_disable_plane,
 172         .destroy = drm_plane_cleanup,
 173         .reset = mtk_plane_reset,
 174         .atomic_duplicate_state = mtk_plane_duplicate_state,
 175         .atomic_destroy_state = mtk_drm_plane_destroy_state,
 176 };
 177
 178 static int mtk_plane_atomic_check(struct drm_plane *plane,
 179                                   struct drm_atomic_state *state)
 180 {
 181         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 182                                                                                  plane);
 183         struct drm_framebuffer *fb = new_plane_state->fb;
 184         struct drm_crtc_state *crtc_state;
 185         int ret;
 186
 187         if (!fb)
 188                 return 0;
 189
 190         if (WARN_ON(!new_plane_state->crtc))
 191                 return 0;
 192
 193         ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
 194                                        to_mtk_plane_state(new_plane_state));
 195         if (ret)
 196                 return ret;
 197
 198         crtc_state = drm_atomic_get_crtc_state(state,
 199                                                new_plane_state->crtc);
 200         if (IS_ERR(crtc_state))
 201                 return PTR_ERR(crtc_state);
 202
 203         return drm_atomic_helper_check_plane_state(new_plane_state,
 204                                                    crtc_state,
 205                                                    DRM_PLANE_HELPER_NO_SCALING,
 206                                                    DRM_PLANE_HELPER_NO_SCALING,
 207                                                    true, true);
 208 }
 209
 210 static void mtk_plane_atomic_disable(struct drm_plane *plane,
 211                                      struct drm_atomic_state *state)
 212 {
 213         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 214                                                                            plane);
 215         struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
 216         mtk_plane_state->pending.enable = false;
 217         wmb(); /* Make sure the above parameter is set before update */
 218         mtk_plane_state->pending.dirty = true;
 219 }
 220
 221 static void mtk_plane_atomic_update(struct drm_plane *plane,
 222                                     struct drm_atomic_state *state)
 223 {
 224         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 225                                                                            plane);
 226         struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
 227
 228         if (!new_state->crtc || WARN_ON(!new_state->fb))
 229                 return;
 230
 231         if (!new_state->visible) {
 232                 mtk_plane_atomic_disable(plane, state);
 233                 return;
 234         }
 235
 236         mtk_plane_update_new_state(new_state, mtk_plane_state);
 237         wmb(); /* Make sure the above parameters are set before update */
 238         mtk_plane_state->pending.dirty = true;
 239 }
 240
 241 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
 242         .atomic_check = mtk_plane_atomic_check,
 243         .atomic_update = mtk_plane_atomic_update,
 244         .atomic_disable = mtk_plane_atomic_disable,
 245         .atomic_async_update = mtk_plane_atomic_async_update,
 246         .atomic_async_check = mtk_plane_atomic_async_check,
 247 };
 248
 249 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
 250                    unsigned long possible_crtcs, enum drm_plane_type type,
 251                    unsigned int supported_rotations)
 252 {
 253         int err;
 254
 255         err = drm_universal_plane_init(dev, plane, possible_crtcs,
 256                                        &mtk_plane_funcs, formats,
 257                                        ARRAY_SIZE(formats), NULL, type, NULL);
 258         if (err) {
 259                 DRM_ERROR("failed to initialize plane\n");
 260                 return err;
 261         }
 262
 263         if (supported_rotations & ~DRM_MODE_ROTATE_0) {
 264                 err = drm_plane_create_rotation_property(plane,
 265                                                          DRM_MODE_ROTATE_0,
 266                                                          supported_rotations);
 267                 if (err)
 268                         DRM_INFO("Create rotation property failed\n");
 269         }
 270
 271         drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
 272
 273         return 0;
 274 }