1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright 2015 Freescale Semiconductor, Inc. 4 * 5 * Freescale DCU drm device driver 6 */ 7 8 #include <linux/regmap.h> 9 10 #include <drm/drm_atomic_helper.h> 11 #include <drm/drm_crtc.h> 12 #include <drm/drm_fb_cma_helper.h> 13 #include <drm/drm_fourcc.h> 14 #include <drm/drm_gem_cma_helper.h> 15 #include <drm/drm_plane_helper.h> 16 #include <drm/drm_probe_helper.h> 17 18 #include "fsl_dcu_drm_drv.h" 19 #include "fsl_dcu_drm_plane.h" 20 21 static int fsl_dcu_drm_plane_index(struct drm_plane *plane) 22 { 23 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private; 24 unsigned int total_layer = fsl_dev->soc->total_layer; 25 unsigned int index; 26 27 index = drm_plane_index(plane); 28 if (index < total_layer) 29 return total_layer - index - 1; 30 31 dev_err(fsl_dev->dev, "No more layer left\n"); 32 return -EINVAL; 33 } 34 35 static int fsl_dcu_drm_plane_atomic_check(struct drm_plane *plane, 36 struct drm_plane_state *state) 37 { 38 struct drm_framebuffer *fb = state->fb; 39 40 if (!state->fb || !state->crtc) 41 return 0; 42 43 switch (fb->format->format) { 44 case DRM_FORMAT_RGB565: 45 case DRM_FORMAT_RGB888: 46 case DRM_FORMAT_XRGB8888: 47 case DRM_FORMAT_ARGB8888: 48 case DRM_FORMAT_XRGB4444: 49 case DRM_FORMAT_ARGB4444: 50 case DRM_FORMAT_XRGB1555: 51 case DRM_FORMAT_ARGB1555: 52 case DRM_FORMAT_YUV422: 53 return 0; 54 default: 55 return -EINVAL; 56 } 57 } 58 59 static void fsl_dcu_drm_plane_atomic_disable(struct drm_plane *plane, 60 struct drm_plane_state *old_state) 61 { 62 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private; 63 unsigned int value; 64 int index; 65 66 index = fsl_dcu_drm_plane_index(plane); 67 if (index < 0) 68 return; 69 70 regmap_read(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), &value); 71 value &= ~DCU_LAYER_EN; 72 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), value); 73 } 74 75 static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane, 76 struct drm_plane_state *old_state) 77 78 { 79 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private; 80 struct drm_plane_state *state = plane->state; 81 struct drm_framebuffer *fb = plane->state->fb; 82 struct drm_gem_cma_object *gem; 83 unsigned int alpha = DCU_LAYER_AB_NONE, bpp; 84 int index; 85 86 if (!fb) 87 return; 88 89 index = fsl_dcu_drm_plane_index(plane); 90 if (index < 0) 91 return; 92 93 gem = drm_fb_cma_get_gem_obj(fb, 0); 94 95 switch (fb->format->format) { 96 case DRM_FORMAT_RGB565: 97 bpp = FSL_DCU_RGB565; 98 break; 99 case DRM_FORMAT_RGB888: 100 bpp = FSL_DCU_RGB888; 101 break; 102 case DRM_FORMAT_ARGB8888: 103 alpha = DCU_LAYER_AB_WHOLE_FRAME; 104 fallthrough; 105 case DRM_FORMAT_XRGB8888: 106 bpp = FSL_DCU_ARGB8888; 107 break; 108 case DRM_FORMAT_ARGB4444: 109 alpha = DCU_LAYER_AB_WHOLE_FRAME; 110 fallthrough; 111 case DRM_FORMAT_XRGB4444: 112 bpp = FSL_DCU_ARGB4444; 113 break; 114 case DRM_FORMAT_ARGB1555: 115 alpha = DCU_LAYER_AB_WHOLE_FRAME; 116 fallthrough; 117 case DRM_FORMAT_XRGB1555: 118 bpp = FSL_DCU_ARGB1555; 119 break; 120 case DRM_FORMAT_YUV422: 121 bpp = FSL_DCU_YUV422; 122 break; 123 default: 124 return; 125 } 126 127 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 1), 128 DCU_LAYER_HEIGHT(state->crtc_h) | 129 DCU_LAYER_WIDTH(state->crtc_w)); 130 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 2), 131 DCU_LAYER_POSY(state->crtc_y) | 132 DCU_LAYER_POSX(state->crtc_x)); 133 regmap_write(fsl_dev->regmap, 134 DCU_CTRLDESCLN(index, 3), gem->paddr); 135 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), 136 DCU_LAYER_EN | 137 DCU_LAYER_TRANS(0xff) | 138 DCU_LAYER_BPP(bpp) | 139 alpha); 140 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5), 141 DCU_LAYER_CKMAX_R(0xFF) | 142 DCU_LAYER_CKMAX_G(0xFF) | 143 DCU_LAYER_CKMAX_B(0xFF)); 144 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 6), 145 DCU_LAYER_CKMIN_R(0) | 146 DCU_LAYER_CKMIN_G(0) | 147 DCU_LAYER_CKMIN_B(0)); 148 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 7), 0); 149 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 8), 150 DCU_LAYER_FG_FCOLOR(0)); 151 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 9), 152 DCU_LAYER_BG_BCOLOR(0)); 153 154 if (!strcmp(fsl_dev->soc->name, "ls1021a")) { 155 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 10), 156 DCU_LAYER_POST_SKIP(0) | 157 DCU_LAYER_PRE_SKIP(0)); 158 } 159 160 return; 161 } 162 163 static const struct drm_plane_helper_funcs fsl_dcu_drm_plane_helper_funcs = { 164 .atomic_check = fsl_dcu_drm_plane_atomic_check, 165 .atomic_disable = fsl_dcu_drm_plane_atomic_disable, 166 .atomic_update = fsl_dcu_drm_plane_atomic_update, 167 }; 168 169 static void fsl_dcu_drm_plane_destroy(struct drm_plane *plane) 170 { 171 drm_plane_cleanup(plane); 172 kfree(plane); 173 } 174 175 static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = { 176 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 177 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 178 .destroy = fsl_dcu_drm_plane_destroy, 179 .disable_plane = drm_atomic_helper_disable_plane, 180 .reset = drm_atomic_helper_plane_reset, 181 .update_plane = drm_atomic_helper_update_plane, 182 }; 183 184 static const u32 fsl_dcu_drm_plane_formats[] = { 185 DRM_FORMAT_RGB565, 186 DRM_FORMAT_RGB888, 187 DRM_FORMAT_XRGB8888, 188 DRM_FORMAT_ARGB8888, 189 DRM_FORMAT_XRGB4444, 190 DRM_FORMAT_ARGB4444, 191 DRM_FORMAT_XRGB1555, 192 DRM_FORMAT_ARGB1555, 193 DRM_FORMAT_YUV422, 194 }; 195 196 void fsl_dcu_drm_init_planes(struct drm_device *dev) 197 { 198 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; 199 int i, j; 200 201 for (i = 0; i < fsl_dev->soc->total_layer; i++) { 202 for (j = 1; j <= fsl_dev->soc->layer_regs; j++) 203 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(i, j), 0); 204 } 205 } 206 207 struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev) 208 { 209 struct drm_plane *primary; 210 int ret; 211 212 primary = kzalloc(sizeof(*primary), GFP_KERNEL); 213 if (!primary) { 214 DRM_DEBUG_KMS("Failed to allocate primary plane\n"); 215 return NULL; 216 } 217 218 /* possible_crtc's will be filled in later by crtc_init */ 219 ret = drm_universal_plane_init(dev, primary, 0, 220 &fsl_dcu_drm_plane_funcs, 221 fsl_dcu_drm_plane_formats, 222 ARRAY_SIZE(fsl_dcu_drm_plane_formats), 223 NULL, DRM_PLANE_TYPE_PRIMARY, NULL); 224 if (ret) { 225 kfree(primary); 226 primary = NULL; 227 } 228 drm_plane_helper_add(primary, &fsl_dcu_drm_plane_helper_funcs); 229 230 return primary; 231 } 232