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_fourcc.h>
  10 #include <drm/drm_plane_helper.h>
  11 #include <drm/drm_gem_framebuffer_helper.h>
  12
  13 #include "mtk_drm_crtc.h"
  14 #include "mtk_drm_ddp_comp.h"
  15 #include "mtk_drm_drv.h"
  16 #include "mtk_drm_fb.h"
  17 #include "mtk_drm_gem.h"
  18 #include "mtk_drm_plane.h"
  19
  20 static const u32 formats[] = {
  21         DRM_FORMAT_XRGB8888,
  22         DRM_FORMAT_ARGB8888,
  23         DRM_FORMAT_BGRX8888,
  24         DRM_FORMAT_BGRA8888,
  25         DRM_FORMAT_ABGR8888,
  26         DRM_FORMAT_XBGR8888,
  27         DRM_FORMAT_RGB888,
  28         DRM_FORMAT_BGR888,
  29         DRM_FORMAT_RGB565,
  30         DRM_FORMAT_UYVY,
  31         DRM_FORMAT_YUYV,
  32 };
  33
  34 static void mtk_plane_reset(struct drm_plane *plane)
  35 {
  36         struct mtk_plane_state *state;
  37
  38         if (plane->state) {
  39                 __drm_atomic_helper_plane_destroy_state(plane->state);
  40
  41                 state = to_mtk_plane_state(plane->state);
  42                 memset(state, 0, sizeof(*state));
  43         } else {
  44                 state = kzalloc(sizeof(*state), GFP_KERNEL);
  45                 if (!state)
  46                         return;
  47                 plane->state = &state->base;
  48         }
  49
  50         state->base.plane = plane;
  51         state->pending.format = DRM_FORMAT_RGB565;
  52 }
  53
  54 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
  55 {
  56         struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
  57         struct mtk_plane_state *state;
  58
  59         state = kzalloc(sizeof(*state), GFP_KERNEL);
  60         if (!state)
  61                 return NULL;
  62
  63         __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
  64
  65         WARN_ON(state->base.plane != plane);
  66
  67         state->pending = old_state->pending;
  68
  69         return &state->base;
  70 }
  71
  72 static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
  73                                         struct drm_plane_state *state)
  74 {
  75         __drm_atomic_helper_plane_destroy_state(state);
  76         kfree(to_mtk_plane_state(state));
  77 }
  78
  79 static const struct drm_plane_funcs mtk_plane_funcs = {
  80         .update_plane = drm_atomic_helper_update_plane,
  81         .disable_plane = drm_atomic_helper_disable_plane,
  82         .destroy = drm_plane_cleanup,
  83         .reset = mtk_plane_reset,
  84         .atomic_duplicate_state = mtk_plane_duplicate_state,
  85         .atomic_destroy_state = mtk_drm_plane_destroy_state,
  86 };
  87
  88 static int mtk_plane_atomic_check(struct drm_plane *plane,
  89                                   struct drm_plane_state *state)
  90 {
  91         struct drm_framebuffer *fb = state->fb;
  92         struct drm_crtc_state *crtc_state;
  93         int ret;
  94
  95         if (!fb)
  96                 return 0;
  97
  98         if (!state->crtc)
  99                 return 0;
 100
 101         ret = mtk_drm_crtc_plane_check(state->crtc, plane,
 102                                        to_mtk_plane_state(state));
 103         if (ret)
 104                 return ret;
 105
 106         crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
 107         if (IS_ERR(crtc_state))
 108                 return PTR_ERR(crtc_state);
 109
 110         return drm_atomic_helper_check_plane_state(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_atomic_update(struct drm_plane *plane,
 117                                     struct drm_plane_state *old_state)
 118 {
 119         struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
 120         struct drm_crtc *crtc = plane->state->crtc;
 121         struct drm_framebuffer *fb = plane->state->fb;
 122         struct drm_gem_object *gem;
 123         struct mtk_drm_gem_obj *mtk_gem;
 124         unsigned int pitch, format;
 125         dma_addr_t addr;
 126
 127         if (!crtc || WARN_ON(!fb))
 128                 return;
 129
 130         gem = fb->obj[0];
 131         mtk_gem = to_mtk_gem_obj(gem);
 132         addr = mtk_gem->dma_addr;
 133         pitch = fb->pitches[0];
 134         format = fb->format->format;
 135
 136         addr += (plane->state->src.x1 >> 16) * fb->format->cpp[0];
 137         addr += (plane->state->src.y1 >> 16) * pitch;
 138
 139         state->pending.enable = true;
 140         state->pending.pitch = pitch;
 141         state->pending.format = format;
 142         state->pending.addr = addr;
 143         state->pending.x = plane->state->dst.x1;
 144         state->pending.y = plane->state->dst.y1;
 145         state->pending.width = drm_rect_width(&plane->state->dst);
 146         state->pending.height = drm_rect_height(&plane->state->dst);
 147         state->pending.rotation = plane->state->rotation;
 148         wmb(); /* Make sure the above parameters are set before update */
 149         state->pending.dirty = true;
 150 }
 151
 152 static void mtk_plane_atomic_disable(struct drm_plane *plane,
 153                                      struct drm_plane_state *old_state)
 154 {
 155         struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
 156
 157         state->pending.enable = false;
 158         wmb(); /* Make sure the above parameter is set before update */
 159         state->pending.dirty = true;
 160 }
 161
 162 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
 163         .prepare_fb = drm_gem_fb_prepare_fb,
 164         .atomic_check = mtk_plane_atomic_check,
 165         .atomic_update = mtk_plane_atomic_update,
 166         .atomic_disable = mtk_plane_atomic_disable,
 167 };
 168
 169 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
 170                    unsigned long possible_crtcs, enum drm_plane_type type,
 171                    unsigned int supported_rotations)
 172 {
 173         int err;
 174
 175         err = drm_universal_plane_init(dev, plane, possible_crtcs,
 176                                        &mtk_plane_funcs, formats,
 177                                        ARRAY_SIZE(formats), NULL, type, NULL);
 178         if (err) {
 179                 DRM_ERROR("failed to initialize plane\n");
 180                 return err;
 181         }
 182
 183         if (supported_rotations & ~DRM_MODE_ROTATE_0) {
 184                 err = drm_plane_create_rotation_property(plane,
 185                                                          DRM_MODE_ROTATE_0,
 186                                                          supported_rotations);
 187                 if (err)
 188                         DRM_INFO("Create rotation property failed\n");
 189         }
 190
 191         drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
 192
 193         return 0;
 194 }