drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c

   1 /*
   2  * Copyright 2015 Freescale Semiconductor, Inc.
   3  *
   4  * Freescale DCU drm device driver
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/regmap.h>
  13
  14 #include <drm/drmP.h>
  15 #include <drm/drm_atomic_helper.h>
  16 #include <drm/drm_crtc.h>
  17 #include <drm/drm_crtc_helper.h>
  18 #include <drm/drm_fb_cma_helper.h>
  19 #include <drm/drm_gem_cma_helper.h>
  20 #include <drm/drm_plane_helper.h>
  21
  22 #include "fsl_dcu_drm_drv.h"
  23 #include "fsl_dcu_drm_plane.h"
  24
  25 static int fsl_dcu_drm_plane_index(struct drm_plane *plane)
  26 {
  27         struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
  28         unsigned int total_layer = fsl_dev->soc->total_layer;
  29         unsigned int index;
  30
  31         index = drm_plane_index(plane);
  32         if (index < total_layer)
  33                 return total_layer - index - 1;
  34
  35         dev_err(fsl_dev->dev, "No more layer left\n");
  36         return -EINVAL;
  37 }
  38
  39 static int fsl_dcu_drm_plane_atomic_check(struct drm_plane *plane,
  40                                           struct drm_plane_state *state)
  41 {
  42         struct drm_framebuffer *fb = state->fb;
  43
  44         if (!state->fb || !state->crtc)
  45                 return 0;
  46
  47         switch (fb->pixel_format) {
  48         case DRM_FORMAT_RGB565:
  49         case DRM_FORMAT_RGB888:
  50         case DRM_FORMAT_XRGB8888:
  51         case DRM_FORMAT_ARGB8888:
  52         case DRM_FORMAT_XRGB4444:
  53         case DRM_FORMAT_ARGB4444:
  54         case DRM_FORMAT_XRGB1555:
  55         case DRM_FORMAT_ARGB1555:
  56         case DRM_FORMAT_YUV422:
  57                 return 0;
  58         default:
  59                 return -EINVAL;
  60         }
  61 }
  62
  63 static void fsl_dcu_drm_plane_atomic_disable(struct drm_plane *plane,
  64                                              struct drm_plane_state *old_state)
  65 {
  66         struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
  67         unsigned int value;
  68         int index;
  69
  70         index = fsl_dcu_drm_plane_index(plane);
  71         if (index < 0)
  72                 return;
  73
  74         regmap_read(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), &value);
  75         value &= ~DCU_LAYER_EN;
  76         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), value);
  77 }
  78
  79 static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
  80                                             struct drm_plane_state *old_state)
  81
  82 {
  83         struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
  84         struct drm_plane_state *state = plane->state;
  85         struct drm_framebuffer *fb = plane->state->fb;
  86         struct drm_gem_cma_object *gem;
  87         unsigned int alpha = DCU_LAYER_AB_NONE, bpp;
  88         int index;
  89
  90         if (!fb)
  91                 return;
  92
  93         index = fsl_dcu_drm_plane_index(plane);
  94         if (index < 0)
  95                 return;
  96
  97         gem = drm_fb_cma_get_gem_obj(fb, 0);
  98
  99         switch (fb->pixel_format) {
 100         case DRM_FORMAT_RGB565:
 101                 bpp = FSL_DCU_RGB565;
 102                 break;
 103         case DRM_FORMAT_RGB888:
 104                 bpp = FSL_DCU_RGB888;
 105                 break;
 106         case DRM_FORMAT_ARGB8888:
 107                 alpha = DCU_LAYER_AB_WHOLE_FRAME;
 108                 /* fall-through */
 109         case DRM_FORMAT_XRGB8888:
 110                 bpp = FSL_DCU_ARGB8888;
 111                 break;
 112         case DRM_FORMAT_ARGB4444:
 113                 alpha = DCU_LAYER_AB_WHOLE_FRAME;
 114                 /* fall-through */
 115         case DRM_FORMAT_XRGB4444:
 116                 bpp = FSL_DCU_ARGB4444;
 117                 break;
 118         case DRM_FORMAT_ARGB1555:
 119                 alpha = DCU_LAYER_AB_WHOLE_FRAME;
 120                 /* fall-through */
 121         case DRM_FORMAT_XRGB1555:
 122                 bpp = FSL_DCU_ARGB1555;
 123                 break;
 124         case DRM_FORMAT_YUV422:
 125                 bpp = FSL_DCU_YUV422;
 126                 break;
 127         default:
 128                 return;
 129         }
 130
 131         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 1),
 132                      DCU_LAYER_HEIGHT(state->crtc_h) |
 133                      DCU_LAYER_WIDTH(state->crtc_w));
 134         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 2),
 135                      DCU_LAYER_POSY(state->crtc_y) |
 136                      DCU_LAYER_POSX(state->crtc_x));
 137         regmap_write(fsl_dev->regmap,
 138                      DCU_CTRLDESCLN(index, 3), gem->paddr);
 139         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4),
 140                      DCU_LAYER_EN |
 141                      DCU_LAYER_TRANS(0xff) |
 142                      DCU_LAYER_BPP(bpp) |
 143                      alpha);
 144         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5),
 145                      DCU_LAYER_CKMAX_R(0xFF) |
 146                      DCU_LAYER_CKMAX_G(0xFF) |
 147                      DCU_LAYER_CKMAX_B(0xFF));
 148         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 6),
 149                      DCU_LAYER_CKMIN_R(0) |
 150                      DCU_LAYER_CKMIN_G(0) |
 151                      DCU_LAYER_CKMIN_B(0));
 152         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 7), 0);
 153         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 8),
 154                      DCU_LAYER_FG_FCOLOR(0));
 155         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 9),
 156                      DCU_LAYER_BG_BCOLOR(0));
 157
 158         if (!strcmp(fsl_dev->soc->name, "ls1021a")) {
 159                 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 10),
 160                              DCU_LAYER_POST_SKIP(0) |
 161                              DCU_LAYER_PRE_SKIP(0));
 162         }
 163
 164         return;
 165 }
 166
 167 static const struct drm_plane_helper_funcs fsl_dcu_drm_plane_helper_funcs = {
 168         .atomic_check = fsl_dcu_drm_plane_atomic_check,
 169         .atomic_disable = fsl_dcu_drm_plane_atomic_disable,
 170         .atomic_update = fsl_dcu_drm_plane_atomic_update,
 171 };
 172
 173 static void fsl_dcu_drm_plane_destroy(struct drm_plane *plane)
 174 {
 175         drm_plane_cleanup(plane);
 176         kfree(plane);
 177 }
 178
 179 static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = {
 180         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 181         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 182         .destroy = fsl_dcu_drm_plane_destroy,
 183         .disable_plane = drm_atomic_helper_disable_plane,
 184         .reset = drm_atomic_helper_plane_reset,
 185         .update_plane = drm_atomic_helper_update_plane,
 186 };
 187
 188 static const u32 fsl_dcu_drm_plane_formats[] = {
 189         DRM_FORMAT_RGB565,
 190         DRM_FORMAT_RGB888,
 191         DRM_FORMAT_XRGB8888,
 192         DRM_FORMAT_ARGB8888,
 193         DRM_FORMAT_XRGB4444,
 194         DRM_FORMAT_ARGB4444,
 195         DRM_FORMAT_XRGB1555,
 196         DRM_FORMAT_ARGB1555,
 197         DRM_FORMAT_YUV422,
 198 };
 199
 200 void fsl_dcu_drm_init_planes(struct drm_device *dev)
 201 {
 202         struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
 203         int i, j;
 204
 205         for (i = 0; i < fsl_dev->soc->total_layer; i++) {
 206                 for (j = 1; j <= fsl_dev->soc->layer_regs; j++)
 207                         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(i, j), 0);
 208         }
 209 }
 210
 211 struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev)
 212 {
 213         struct drm_plane *primary;
 214         int ret;
 215
 216         primary = kzalloc(sizeof(*primary), GFP_KERNEL);
 217         if (!primary) {
 218                 DRM_DEBUG_KMS("Failed to allocate primary plane\n");
 219                 return NULL;
 220         }
 221
 222         /* possible_crtc's will be filled in later by crtc_init */
 223         ret = drm_universal_plane_init(dev, primary, 0,
 224                                        &fsl_dcu_drm_plane_funcs,
 225                                        fsl_dcu_drm_plane_formats,
 226                                        ARRAY_SIZE(fsl_dcu_drm_plane_formats),
 227                                        DRM_PLANE_TYPE_PRIMARY, NULL);
 228         if (ret) {
 229                 kfree(primary);
 230                 primary = NULL;
 231         }
 232         drm_plane_helper_add(primary, &fsl_dcu_drm_plane_helper_funcs);
 233
 234         return primary;
 235 }