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_ARGB8888:
  51         case DRM_FORMAT_BGRA4444:
  52         case DRM_FORMAT_ARGB1555:
  53         case DRM_FORMAT_YUV422:
  54                 return 0;
  55         default:
  56                 return -EINVAL;
  57         }
  58 }
  59
  60 static void fsl_dcu_drm_plane_atomic_disable(struct drm_plane *plane,
  61                                              struct drm_plane_state *old_state)
  62 {
  63         struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
  64         unsigned int value;
  65         int index;
  66
  67         index = fsl_dcu_drm_plane_index(plane);
  68         if (index < 0)
  69                 return;
  70
  71         regmap_read(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), &value);
  72         value &= ~DCU_LAYER_EN;
  73         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), value);
  74 }
  75
  76 static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
  77                                             struct drm_plane_state *old_state)
  78
  79 {
  80         struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
  81         struct drm_plane_state *state = plane->state;
  82         struct drm_framebuffer *fb = plane->state->fb;
  83         struct drm_gem_cma_object *gem;
  84         unsigned int alpha, bpp;
  85         int index;
  86
  87         if (!fb)
  88                 return;
  89
  90         index = fsl_dcu_drm_plane_index(plane);
  91         if (index < 0)
  92                 return;
  93
  94         gem = drm_fb_cma_get_gem_obj(fb, 0);
  95
  96         switch (fb->pixel_format) {
  97         case DRM_FORMAT_RGB565:
  98                 bpp = FSL_DCU_RGB565;
  99                 alpha = 0xff;
 100                 break;
 101         case DRM_FORMAT_RGB888:
 102                 bpp = FSL_DCU_RGB888;
 103                 alpha = 0xff;
 104                 break;
 105         case DRM_FORMAT_ARGB8888:
 106                 bpp = FSL_DCU_ARGB8888;
 107                 alpha = 0xff;
 108                 break;
 109         case DRM_FORMAT_BGRA4444:
 110                 bpp = FSL_DCU_ARGB4444;
 111                 alpha = 0xff;
 112                 break;
 113         case DRM_FORMAT_ARGB1555:
 114                 bpp = FSL_DCU_ARGB1555;
 115                 alpha = 0xff;
 116                 break;
 117         case DRM_FORMAT_YUV422:
 118                 bpp = FSL_DCU_YUV422;
 119                 alpha = 0xff;
 120                 break;
 121         default:
 122                 return;
 123         }
 124
 125         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 1),
 126                      DCU_LAYER_HEIGHT(state->crtc_h) |
 127                      DCU_LAYER_WIDTH(state->crtc_w));
 128         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 2),
 129                      DCU_LAYER_POSY(state->crtc_y) |
 130                      DCU_LAYER_POSX(state->crtc_x));
 131         regmap_write(fsl_dev->regmap,
 132                      DCU_CTRLDESCLN(index, 3), gem->paddr);
 133         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4),
 134                      DCU_LAYER_EN |
 135                      DCU_LAYER_TRANS(alpha) |
 136                      DCU_LAYER_BPP(bpp) |
 137                      DCU_LAYER_AB(0));
 138         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5),
 139                      DCU_LAYER_CKMAX_R(0xFF) |
 140                      DCU_LAYER_CKMAX_G(0xFF) |
 141                      DCU_LAYER_CKMAX_B(0xFF));
 142         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 6),
 143                      DCU_LAYER_CKMIN_R(0) |
 144                      DCU_LAYER_CKMIN_G(0) |
 145                      DCU_LAYER_CKMIN_B(0));
 146         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 7), 0);
 147         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 8),
 148                      DCU_LAYER_FG_FCOLOR(0));
 149         regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 9),
 150                      DCU_LAYER_BG_BCOLOR(0));
 151
 152         if (!strcmp(fsl_dev->soc->name, "ls1021a")) {
 153                 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 10),
 154                              DCU_LAYER_POST_SKIP(0) |
 155                              DCU_LAYER_PRE_SKIP(0));
 156         }
 157         regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE,
 158                            DCU_MODE_DCU_MODE_MASK,
 159                            DCU_MODE_DCU_MODE(DCU_MODE_NORMAL));
 160         regmap_write(fsl_dev->regmap,
 161                      DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG);
 162
 163         return;
 164 }
 165
 166 static void
 167 fsl_dcu_drm_plane_cleanup_fb(struct drm_plane *plane,
 168                              const struct drm_plane_state *new_state)
 169 {
 170 }
 171
 172 static int
 173 fsl_dcu_drm_plane_prepare_fb(struct drm_plane *plane,
 174                              const struct drm_plane_state *new_state)
 175 {
 176         return 0;
 177 }
 178
 179 static const struct drm_plane_helper_funcs fsl_dcu_drm_plane_helper_funcs = {
 180         .atomic_check = fsl_dcu_drm_plane_atomic_check,
 181         .atomic_disable = fsl_dcu_drm_plane_atomic_disable,
 182         .atomic_update = fsl_dcu_drm_plane_atomic_update,
 183         .cleanup_fb = fsl_dcu_drm_plane_cleanup_fb,
 184         .prepare_fb = fsl_dcu_drm_plane_prepare_fb,
 185 };
 186
 187 static void fsl_dcu_drm_plane_destroy(struct drm_plane *plane)
 188 {
 189         drm_plane_cleanup(plane);
 190         kfree(plane);
 191 }
 192
 193 static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = {
 194         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 195         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 196         .destroy = fsl_dcu_drm_plane_destroy,
 197         .disable_plane = drm_atomic_helper_disable_plane,
 198         .reset = drm_atomic_helper_plane_reset,
 199         .update_plane = drm_atomic_helper_update_plane,
 200 };
 201
 202 static const u32 fsl_dcu_drm_plane_formats[] = {
 203         DRM_FORMAT_RGB565,
 204         DRM_FORMAT_RGB888,
 205         DRM_FORMAT_ARGB8888,
 206         DRM_FORMAT_ARGB4444,
 207         DRM_FORMAT_ARGB1555,
 208         DRM_FORMAT_YUV422,
 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 }