drivers/gpu/drm/tidss/tidss_plane.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
   4  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
   5  */
   6
   7 #include <drm/drm_atomic.h>
   8 #include <drm/drm_atomic_helper.h>
   9 #include <drm/drm_blend.h>
  10 #include <drm/drm_crtc.h>
  11 #include <drm/drm_fourcc.h>
  12 #include <drm/drm_framebuffer.h>
  13 #include <drm/drm_gem_atomic_helper.h>
  14
  15 #include "tidss_crtc.h"
  16 #include "tidss_dispc.h"
  17 #include "tidss_drv.h"
  18 #include "tidss_plane.h"
  19
  20 /* drm_plane_helper_funcs */
  21
  22 static int tidss_plane_atomic_check(struct drm_plane *plane,
  23                                     struct drm_atomic_state *state)
  24 {
  25         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
  26                                                                                  plane);
  27         struct drm_device *ddev = plane->dev;
  28         struct tidss_device *tidss = to_tidss(ddev);
  29         struct tidss_plane *tplane = to_tidss_plane(plane);
  30         const struct drm_format_info *finfo;
  31         struct drm_crtc_state *crtc_state;
  32         u32 hw_plane = tplane->hw_plane_id;
  33         u32 hw_videoport;
  34         int ret;
  35
  36         dev_dbg(ddev->dev, "%s\n", __func__);
  37
  38         if (!new_plane_state->crtc) {
  39                 /*
  40                  * The visible field is not reset by the DRM core but only
  41                  * updated by drm_atomic_helper_check_plane_state(), set it
  42                  * manually.
  43                  */
  44                 new_plane_state->visible = false;
  45                 return 0;
  46         }
  47
  48         crtc_state = drm_atomic_get_crtc_state(state,
  49                                                new_plane_state->crtc);
  50         if (IS_ERR(crtc_state))
  51                 return PTR_ERR(crtc_state);
  52
  53         ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
  54                                                   0,
  55                                                   INT_MAX, true, true);
  56         if (ret < 0)
  57                 return ret;
  58
  59         /*
  60          * The HW is only able to start drawing at subpixel boundary
  61          * (the two first checks bellow). At the end of a row the HW
  62          * can only jump integer number of subpixels forward to the
  63          * beginning of the next row. So we can only show picture with
  64          * integer subpixel width (the third check). However, after
  65          * reaching the end of the drawn picture the drawing starts
  66          * again at the absolute memory address where top left corner
  67          * position of the drawn picture is (so there is no need to
  68          * check for odd height).
  69          */
  70
  71         finfo = drm_format_info(new_plane_state->fb->format->format);
  72
  73         if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) {
  74                 dev_dbg(ddev->dev,
  75                         "%s: x-position %u not divisible subpixel size %u\n",
  76                         __func__, (new_plane_state->src_x >> 16), finfo->hsub);
  77                 return -EINVAL;
  78         }
  79
  80         if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) {
  81                 dev_dbg(ddev->dev,
  82                         "%s: y-position %u not divisible subpixel size %u\n",
  83                         __func__, (new_plane_state->src_y >> 16), finfo->vsub);
  84                 return -EINVAL;
  85         }
  86
  87         if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) {
  88                 dev_dbg(ddev->dev,
  89                         "%s: src width %u not divisible by subpixel size %u\n",
  90                          __func__, (new_plane_state->src_w >> 16),
  91                          finfo->hsub);
  92                 return -EINVAL;
  93         }
  94
  95         if (!new_plane_state->visible)
  96                 return 0;
  97
  98         hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport;
  99
 100         ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state,
 101                                 hw_videoport);
 102         if (ret)
 103                 return ret;
 104
 105         return 0;
 106 }
 107
 108 static void tidss_plane_atomic_update(struct drm_plane *plane,
 109                                       struct drm_atomic_state *state)
 110 {
 111         struct drm_device *ddev = plane->dev;
 112         struct tidss_device *tidss = to_tidss(ddev);
 113         struct tidss_plane *tplane = to_tidss_plane(plane);
 114         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 115                                                                            plane);
 116         u32 hw_videoport;
 117
 118         dev_dbg(ddev->dev, "%s\n", __func__);
 119
 120         if (!new_state->visible) {
 121                 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
 122                 return;
 123         }
 124
 125         hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport;
 126
 127         dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport);
 128 }
 129
 130 static void tidss_plane_atomic_enable(struct drm_plane *plane,
 131                                       struct drm_atomic_state *state)
 132 {
 133         struct drm_device *ddev = plane->dev;
 134         struct tidss_device *tidss = to_tidss(ddev);
 135         struct tidss_plane *tplane = to_tidss_plane(plane);
 136
 137         dev_dbg(ddev->dev, "%s\n", __func__);
 138
 139         dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true);
 140 }
 141
 142 static void tidss_plane_atomic_disable(struct drm_plane *plane,
 143                                        struct drm_atomic_state *state)
 144 {
 145         struct drm_device *ddev = plane->dev;
 146         struct tidss_device *tidss = to_tidss(ddev);
 147         struct tidss_plane *tplane = to_tidss_plane(plane);
 148
 149         dev_dbg(ddev->dev, "%s\n", __func__);
 150
 151         dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
 152 }
 153
 154 static void drm_plane_destroy(struct drm_plane *plane)
 155 {
 156         struct tidss_plane *tplane = to_tidss_plane(plane);
 157
 158         drm_plane_cleanup(plane);
 159         kfree(tplane);
 160 }
 161
 162 static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = {
 163         .atomic_check = tidss_plane_atomic_check,
 164         .atomic_update = tidss_plane_atomic_update,
 165         .atomic_enable = tidss_plane_atomic_enable,
 166         .atomic_disable = tidss_plane_atomic_disable,
 167 };
 168
 169 static const struct drm_plane_funcs tidss_plane_funcs = {
 170         .update_plane = drm_atomic_helper_update_plane,
 171         .disable_plane = drm_atomic_helper_disable_plane,
 172         .reset = drm_atomic_helper_plane_reset,
 173         .destroy = drm_plane_destroy,
 174         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 175         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 176 };
 177
 178 struct tidss_plane *tidss_plane_create(struct tidss_device *tidss,
 179                                        u32 hw_plane_id, u32 plane_type,
 180                                        u32 crtc_mask, const u32 *formats,
 181                                        u32 num_formats)
 182 {
 183         struct tidss_plane *tplane;
 184         enum drm_plane_type type;
 185         u32 possible_crtcs;
 186         u32 num_planes = tidss->feat->num_planes;
 187         u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) |
 188                                BIT(DRM_COLOR_YCBCR_BT709));
 189         u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) |
 190                             BIT(DRM_COLOR_YCBCR_LIMITED_RANGE));
 191         u32 default_encoding = DRM_COLOR_YCBCR_BT601;
 192         u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE;
 193         u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) |
 194                            BIT(DRM_MODE_BLEND_COVERAGE));
 195         int ret;
 196
 197         tplane = kzalloc(sizeof(*tplane), GFP_KERNEL);
 198         if (!tplane)
 199                 return ERR_PTR(-ENOMEM);
 200
 201         tplane->hw_plane_id = hw_plane_id;
 202
 203         possible_crtcs = crtc_mask;
 204         type = plane_type;
 205
 206         ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane,
 207                                        possible_crtcs,
 208                                        &tidss_plane_funcs,
 209                                        formats, num_formats,
 210                                        NULL, type, NULL);
 211         if (ret < 0)
 212                 goto err;
 213
 214         drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs);
 215
 216         drm_plane_create_zpos_property(&tplane->plane, tidss->num_planes, 0,
 217                                        num_planes - 1);
 218
 219         ret = drm_plane_create_color_properties(&tplane->plane,
 220                                                 color_encodings,
 221                                                 color_ranges,
 222                                                 default_encoding,
 223                                                 default_range);
 224         if (ret)
 225                 goto err;
 226
 227         ret = drm_plane_create_alpha_property(&tplane->plane);
 228         if (ret)
 229                 goto err;
 230
 231         ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes);
 232         if (ret)
 233                 goto err;
 234
 235         return tplane;
 236
 237 err:
 238         kfree(tplane);
 239         return ERR_PTR(ret);
 240 }