drivers/gpu/drm/tidss/tidss_plane.c

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