drivers/gpu/drm/arm/malidp_planes.c

   1 /*
   2  * (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
   3  * Author: Liviu Dudau <Liviu.Dudau@arm.com>
   4  *
   5  * This program is free software and is provided to you under the terms of the
   6  * GNU General Public License version 2 as published by the Free Software
   7  * Foundation, and any use by you of this program is subject to the terms
   8  * of such GNU licence.
   9  *
  10  * ARM Mali DP plane manipulation routines.
  11  */
  12
  13 #include <drm/drmP.h>
  14 #include <drm/drm_atomic_helper.h>
  15 #include <drm/drm_fb_cma_helper.h>
  16 #include <drm/drm_gem_cma_helper.h>
  17 #include <drm/drm_plane_helper.h>
  18
  19 #include "malidp_hw.h"
  20 #include "malidp_drv.h"
  21
  22 /* Layer specific register offsets */
  23 #define MALIDP_LAYER_FORMAT             0x000
  24 #define MALIDP_LAYER_CONTROL            0x004
  25 #define   LAYER_ENABLE                  (1 << 0)
  26 #define   LAYER_ROT_OFFSET              8
  27 #define   LAYER_H_FLIP                  (1 << 10)
  28 #define   LAYER_V_FLIP                  (1 << 11)
  29 #define   LAYER_ROT_MASK                (0xf << 8)
  30 #define MALIDP_LAYER_SIZE               0x00c
  31 #define   LAYER_H_VAL(x)                (((x) & 0x1fff) << 0)
  32 #define   LAYER_V_VAL(x)                (((x) & 0x1fff) << 16)
  33 #define MALIDP_LAYER_COMP_SIZE          0x010
  34 #define MALIDP_LAYER_OFFSET             0x014
  35 #define MALIDP_LAYER_STRIDE             0x018
  36
  37 static void malidp_de_plane_destroy(struct drm_plane *plane)
  38 {
  39         struct malidp_plane *mp = to_malidp_plane(plane);
  40
  41         if (mp->base.fb)
  42                 drm_framebuffer_unreference(mp->base.fb);
  43
  44         drm_plane_helper_disable(plane);
  45         drm_plane_cleanup(plane);
  46         devm_kfree(plane->dev->dev, mp);
  47 }
  48
  49 struct drm_plane_state *malidp_duplicate_plane_state(struct drm_plane *plane)
  50 {
  51         struct malidp_plane_state *state, *m_state;
  52
  53         if (!plane->state)
  54                 return NULL;
  55
  56         state = kmalloc(sizeof(*state), GFP_KERNEL);
  57         if (state) {
  58                 m_state = to_malidp_plane_state(plane->state);
  59                 __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
  60                 state->rotmem_size = m_state->rotmem_size;
  61         }
  62
  63         return &state->base;
  64 }
  65
  66 void malidp_destroy_plane_state(struct drm_plane *plane,
  67                                 struct drm_plane_state *state)
  68 {
  69         struct malidp_plane_state *m_state = to_malidp_plane_state(state);
  70
  71         __drm_atomic_helper_plane_destroy_state(state);
  72         kfree(m_state);
  73 }
  74
  75 static const struct drm_plane_funcs malidp_de_plane_funcs = {
  76         .update_plane = drm_atomic_helper_update_plane,
  77         .disable_plane = drm_atomic_helper_disable_plane,
  78         .destroy = malidp_de_plane_destroy,
  79         .reset = drm_atomic_helper_plane_reset,
  80         .atomic_duplicate_state = malidp_duplicate_plane_state,
  81         .atomic_destroy_state = malidp_destroy_plane_state,
  82 };
  83
  84 static int malidp_de_plane_check(struct drm_plane *plane,
  85                                  struct drm_plane_state *state)
  86 {
  87         struct malidp_plane *mp = to_malidp_plane(plane);
  88         struct malidp_plane_state *ms = to_malidp_plane_state(state);
  89         u8 format_id;
  90         u32 src_w, src_h;
  91
  92         if (!state->crtc || !state->fb)
  93                 return 0;
  94
  95         format_id = malidp_hw_get_format_id(&mp->hwdev->map, mp->layer->id,
  96                                             state->fb->pixel_format);
  97         if (format_id == MALIDP_INVALID_FORMAT_ID)
  98                 return -EINVAL;
  99
 100         src_w = state->src_w >> 16;
 101         src_h = state->src_h >> 16;
 102
 103         if ((state->crtc_w > mp->hwdev->max_line_size) ||
 104             (state->crtc_h > mp->hwdev->max_line_size) ||
 105             (state->crtc_w < mp->hwdev->min_line_size) ||
 106             (state->crtc_h < mp->hwdev->min_line_size) ||
 107             (state->crtc_w != src_w) || (state->crtc_h != src_h))
 108                 return -EINVAL;
 109
 110         /* packed RGB888 / BGR888 can't be rotated or flipped */
 111         if (state->rotation != DRM_ROTATE_0 &&
 112             (state->fb->pixel_format == DRM_FORMAT_RGB888 ||
 113              state->fb->pixel_format == DRM_FORMAT_BGR888))
 114                 return -EINVAL;
 115
 116         ms->rotmem_size = 0;
 117         if (state->rotation & MALIDP_ROTATED_MASK) {
 118                 int val;
 119
 120                 val = mp->hwdev->rotmem_required(mp->hwdev, state->crtc_h,
 121                                                  state->crtc_w,
 122                                                  state->fb->pixel_format);
 123                 if (val < 0)
 124                         return val;
 125
 126                 ms->rotmem_size = val;
 127         }
 128
 129         return 0;
 130 }
 131
 132 static void malidp_de_plane_update(struct drm_plane *plane,
 133                                    struct drm_plane_state *old_state)
 134 {
 135         struct drm_gem_cma_object *obj;
 136         struct malidp_plane *mp;
 137         const struct malidp_hw_regmap *map;
 138         u8 format_id;
 139         u16 ptr;
 140         u32 format, src_w, src_h, dest_w, dest_h, val = 0;
 141         int num_planes, i;
 142
 143         mp = to_malidp_plane(plane);
 144
 145         map = &mp->hwdev->map;
 146         format = plane->state->fb->pixel_format;
 147         format_id = malidp_hw_get_format_id(map, mp->layer->id, format);
 148         num_planes = drm_format_num_planes(format);
 149
 150         /* convert src values from Q16 fixed point to integer */
 151         src_w = plane->state->src_w >> 16;
 152         src_h = plane->state->src_h >> 16;
 153         dest_w = plane->state->crtc_w;
 154         dest_h = plane->state->crtc_h;
 155
 156         malidp_hw_write(mp->hwdev, format_id, mp->layer->base);
 157
 158         for (i = 0; i < num_planes; i++) {
 159                 /* calculate the offset for the layer's plane registers */
 160                 ptr = mp->layer->ptr + (i << 4);
 161
 162                 obj = drm_fb_cma_get_gem_obj(plane->state->fb, i);
 163                 malidp_hw_write(mp->hwdev, lower_32_bits(obj->paddr), ptr);
 164                 malidp_hw_write(mp->hwdev, upper_32_bits(obj->paddr), ptr + 4);
 165                 malidp_hw_write(mp->hwdev, plane->state->fb->pitches[i],
 166                                 mp->layer->base + MALIDP_LAYER_STRIDE);
 167         }
 168
 169         malidp_hw_write(mp->hwdev, LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
 170                         mp->layer->base + MALIDP_LAYER_SIZE);
 171
 172         malidp_hw_write(mp->hwdev, LAYER_H_VAL(dest_w) | LAYER_V_VAL(dest_h),
 173                         mp->layer->base + MALIDP_LAYER_COMP_SIZE);
 174
 175         malidp_hw_write(mp->hwdev, LAYER_H_VAL(plane->state->crtc_x) |
 176                         LAYER_V_VAL(plane->state->crtc_y),
 177                         mp->layer->base + MALIDP_LAYER_OFFSET);
 178
 179         /* first clear the rotation bits in the register */
 180         malidp_hw_clearbits(mp->hwdev, LAYER_ROT_MASK,
 181                             mp->layer->base + MALIDP_LAYER_CONTROL);
 182
 183         /* setup the rotation and axis flip bits */
 184         if (plane->state->rotation & DRM_ROTATE_MASK)
 185                 val |= ilog2(plane->state->rotation & DRM_ROTATE_MASK) <<
 186                        LAYER_ROT_OFFSET;
 187         if (plane->state->rotation & DRM_REFLECT_X)
 188                 val |= LAYER_H_FLIP;
 189         if (plane->state->rotation & DRM_REFLECT_Y)
 190                 val |= LAYER_V_FLIP;
 191
 192         /* set the 'enable layer' bit */
 193         val |= LAYER_ENABLE;
 194
 195         malidp_hw_setbits(mp->hwdev, val,
 196                           mp->layer->base + MALIDP_LAYER_CONTROL);
 197 }
 198
 199 static void malidp_de_plane_disable(struct drm_plane *plane,
 200                                     struct drm_plane_state *state)
 201 {
 202         struct malidp_plane *mp = to_malidp_plane(plane);
 203
 204         malidp_hw_clearbits(mp->hwdev, LAYER_ENABLE,
 205                             mp->layer->base + MALIDP_LAYER_CONTROL);
 206 }
 207
 208 static const struct drm_plane_helper_funcs malidp_de_plane_helper_funcs = {
 209         .atomic_check = malidp_de_plane_check,
 210         .atomic_update = malidp_de_plane_update,
 211         .atomic_disable = malidp_de_plane_disable,
 212 };
 213
 214 int malidp_de_planes_init(struct drm_device *drm)
 215 {
 216         struct malidp_drm *malidp = drm->dev_private;
 217         const struct malidp_hw_regmap *map = &malidp->dev->map;
 218         struct malidp_plane *plane = NULL;
 219         enum drm_plane_type plane_type;
 220         unsigned long crtcs = 1 << drm->mode_config.num_crtc;
 221         u32 *formats;
 222         int ret, i, j, n;
 223
 224         formats = kcalloc(map->n_input_formats, sizeof(*formats), GFP_KERNEL);
 225         if (!formats) {
 226                 ret = -ENOMEM;
 227                 goto cleanup;
 228         }
 229
 230         for (i = 0; i < map->n_layers; i++) {
 231                 u8 id = map->layers[i].id;
 232
 233                 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 234                 if (!plane) {
 235                         ret = -ENOMEM;
 236                         goto cleanup;
 237                 }
 238
 239                 /* build the list of DRM supported formats based on the map */
 240                 for (n = 0, j = 0;  j < map->n_input_formats; j++) {
 241                         if ((map->input_formats[j].layer & id) == id)
 242                                 formats[n++] = map->input_formats[j].format;
 243                 }
 244
 245                 plane_type = (i == 0) ? DRM_PLANE_TYPE_PRIMARY :
 246                                         DRM_PLANE_TYPE_OVERLAY;
 247                 ret = drm_universal_plane_init(drm, &plane->base, crtcs,
 248                                                &malidp_de_plane_funcs, formats,
 249                                                n, plane_type, NULL);
 250                 if (ret < 0)
 251                         goto cleanup;
 252
 253                 if (!drm->mode_config.rotation_property) {
 254                         unsigned long flags = DRM_ROTATE_0 |
 255                                               DRM_ROTATE_90 |
 256                                               DRM_ROTATE_180 |
 257                                               DRM_ROTATE_270 |
 258                                               DRM_REFLECT_X |
 259                                               DRM_REFLECT_Y;
 260                         drm->mode_config.rotation_property =
 261                                 drm_mode_create_rotation_property(drm, flags);
 262                 }
 263                 /* SMART layer can't be rotated */
 264                 if (drm->mode_config.rotation_property && (id != DE_SMART))
 265                         drm_object_attach_property(&plane->base.base,
 266                                                    drm->mode_config.rotation_property,
 267                                                    DRM_ROTATE_0);
 268
 269                 drm_plane_helper_add(&plane->base,
 270                                      &malidp_de_plane_helper_funcs);
 271                 plane->hwdev = malidp->dev;
 272                 plane->layer = &map->layers[i];
 273         }
 274
 275         kfree(formats);
 276
 277         return 0;
 278
 279 cleanup:
 280         malidp_de_planes_destroy(drm);
 281         kfree(formats);
 282
 283         return ret;
 284 }
 285
 286 void malidp_de_planes_destroy(struct drm_device *drm)
 287 {
 288         struct drm_plane *p, *pt;
 289
 290         list_for_each_entry_safe(p, pt, &drm->mode_config.plane_list, head) {
 291                 drm_plane_cleanup(p);
 292                 kfree(p);
 293         }
 294 }