1 /* 2 * Copyright (C) STMicroelectronics SA 2014 3 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com> 4 * Fabien Dessenne <fabien.dessenne@st.com> 5 * for STMicroelectronics. 6 * License terms: GNU General Public License (GPL), version 2 7 */ 8 9 #include <linux/component.h> 10 #include <linux/module.h> 11 #include <linux/platform_device.h> 12 #include <linux/reset.h> 13 14 #include <drm/drmP.h> 15 16 #include "sti_compositor.h" 17 #include "sti_drm_crtc.h" 18 #include "sti_drm_drv.h" 19 #include "sti_drm_plane.h" 20 #include "sti_gdp.h" 21 #include "sti_vtg.h" 22 23 /* 24 * stiH407 compositor properties 25 */ 26 struct sti_compositor_data stih407_compositor_data = { 27 .nb_subdev = 8, 28 .subdev_desc = { 29 {STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000}, 30 {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100}, 31 {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200}, 32 {STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300}, 33 {STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400}, 34 {STI_VID_SUBDEV, (int)STI_VID_0, 0x700}, 35 {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}, 36 {STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00}, 37 }, 38 }; 39 40 /* 41 * stiH416 compositor properties 42 * Note: 43 * on stih416 MIXER_AUX has a different base address from MIXER_MAIN 44 * Moreover, GDPx is different for Main and Aux Mixer. So this subdev map does 45 * not fit for stiH416 if we want to enable the MIXER_AUX. 46 */ 47 struct sti_compositor_data stih416_compositor_data = { 48 .nb_subdev = 3, 49 .subdev_desc = { 50 {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100}, 51 {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200}, 52 {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00} 53 }, 54 }; 55 56 static int sti_compositor_init_subdev(struct sti_compositor *compo, 57 struct sti_compositor_subdev_descriptor *desc, 58 unsigned int array_size) 59 { 60 unsigned int i, mixer_id = 0, layer_id = 0; 61 62 for (i = 0; i < array_size; i++) { 63 switch (desc[i].type) { 64 case STI_MIXER_MAIN_SUBDEV: 65 case STI_MIXER_AUX_SUBDEV: 66 compo->mixer[mixer_id++] = 67 sti_mixer_create(compo->dev, desc[i].id, 68 compo->regs + desc[i].offset); 69 break; 70 case STI_GPD_SUBDEV: 71 case STI_VID_SUBDEV: 72 case STI_CURSOR_SUBDEV: 73 compo->layer[layer_id++] = 74 sti_layer_create(compo->dev, desc[i].id, 75 compo->regs + desc[i].offset); 76 break; 77 default: 78 DRM_ERROR("Unknow subdev compoment type\n"); 79 return 1; 80 } 81 82 } 83 compo->nb_mixers = mixer_id; 84 compo->nb_layers = layer_id; 85 86 return 0; 87 } 88 89 static int sti_compositor_bind(struct device *dev, struct device *master, 90 void *data) 91 { 92 struct sti_compositor *compo = dev_get_drvdata(dev); 93 struct drm_device *drm_dev = data; 94 unsigned int i, crtc = 0, plane = 0; 95 struct sti_drm_private *dev_priv = drm_dev->dev_private; 96 struct drm_plane *cursor = NULL; 97 struct drm_plane *primary = NULL; 98 99 dev_priv->compo = compo; 100 101 for (i = 0; i < compo->nb_layers; i++) { 102 if (compo->layer[i]) { 103 enum sti_layer_desc desc = compo->layer[i]->desc; 104 enum sti_layer_type type = desc & STI_LAYER_TYPE_MASK; 105 enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY; 106 107 if (crtc < compo->nb_mixers) 108 plane_type = DRM_PLANE_TYPE_PRIMARY; 109 110 switch (type) { 111 case STI_CUR: 112 cursor = sti_drm_plane_init(drm_dev, 113 compo->layer[i], 114 1, DRM_PLANE_TYPE_CURSOR); 115 break; 116 case STI_GDP: 117 case STI_VID: 118 primary = sti_drm_plane_init(drm_dev, 119 compo->layer[i], 120 (1 << compo->nb_mixers) - 1, 121 plane_type); 122 plane++; 123 break; 124 case STI_BCK: 125 case STI_VDP: 126 break; 127 } 128 129 /* The first planes are reserved for primary planes*/ 130 if (crtc < compo->nb_mixers && primary) { 131 sti_drm_crtc_init(drm_dev, compo->mixer[crtc], 132 primary, cursor); 133 crtc++; 134 cursor = NULL; 135 primary = NULL; 136 } 137 } 138 } 139 140 drm_vblank_init(drm_dev, crtc); 141 /* Allow usage of vblank without having to call drm_irq_install */ 142 drm_dev->irq_enabled = 1; 143 144 DRM_DEBUG_DRIVER("Initialized %d DRM CRTC(s) and %d DRM plane(s)\n", 145 crtc, plane); 146 DRM_DEBUG_DRIVER("DRM plane(s) for VID/VDP not created yet\n"); 147 148 return 0; 149 } 150 151 static void sti_compositor_unbind(struct device *dev, struct device *master, 152 void *data) 153 { 154 /* do nothing */ 155 } 156 157 static const struct component_ops sti_compositor_ops = { 158 .bind = sti_compositor_bind, 159 .unbind = sti_compositor_unbind, 160 }; 161 162 static const struct of_device_id compositor_of_match[] = { 163 { 164 .compatible = "st,stih416-compositor", 165 .data = &stih416_compositor_data, 166 }, { 167 .compatible = "st,stih407-compositor", 168 .data = &stih407_compositor_data, 169 }, { 170 /* end node */ 171 } 172 }; 173 MODULE_DEVICE_TABLE(of, compositor_of_match); 174 175 static int sti_compositor_probe(struct platform_device *pdev) 176 { 177 struct device *dev = &pdev->dev; 178 struct device_node *np = dev->of_node; 179 struct device_node *vtg_np; 180 struct sti_compositor *compo; 181 struct resource *res; 182 int err; 183 184 compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL); 185 if (!compo) { 186 DRM_ERROR("Failed to allocate compositor context\n"); 187 return -ENOMEM; 188 } 189 compo->dev = dev; 190 compo->vtg_vblank_nb.notifier_call = sti_drm_crtc_vblank_cb; 191 192 /* populate data structure depending on compatibility */ 193 BUG_ON(!of_match_node(compositor_of_match, np)->data); 194 195 memcpy(&compo->data, of_match_node(compositor_of_match, np)->data, 196 sizeof(struct sti_compositor_data)); 197 198 /* Get Memory ressources */ 199 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 200 if (res == NULL) { 201 DRM_ERROR("Get memory resource failed\n"); 202 return -ENXIO; 203 } 204 compo->regs = devm_ioremap(dev, res->start, resource_size(res)); 205 if (compo->regs == NULL) { 206 DRM_ERROR("Register mapping failed\n"); 207 return -ENXIO; 208 } 209 210 /* Get clock resources */ 211 compo->clk_compo_main = devm_clk_get(dev, "compo_main"); 212 if (IS_ERR(compo->clk_compo_main)) { 213 DRM_ERROR("Cannot get compo_main clock\n"); 214 return PTR_ERR(compo->clk_compo_main); 215 } 216 217 compo->clk_compo_aux = devm_clk_get(dev, "compo_aux"); 218 if (IS_ERR(compo->clk_compo_aux)) { 219 DRM_ERROR("Cannot get compo_aux clock\n"); 220 return PTR_ERR(compo->clk_compo_aux); 221 } 222 223 compo->clk_pix_main = devm_clk_get(dev, "pix_main"); 224 if (IS_ERR(compo->clk_pix_main)) { 225 DRM_ERROR("Cannot get pix_main clock\n"); 226 return PTR_ERR(compo->clk_pix_main); 227 } 228 229 compo->clk_pix_aux = devm_clk_get(dev, "pix_aux"); 230 if (IS_ERR(compo->clk_pix_aux)) { 231 DRM_ERROR("Cannot get pix_aux clock\n"); 232 return PTR_ERR(compo->clk_pix_aux); 233 } 234 235 /* Get reset resources */ 236 compo->rst_main = devm_reset_control_get(dev, "compo-main"); 237 /* Take compo main out of reset */ 238 if (!IS_ERR(compo->rst_main)) 239 reset_control_deassert(compo->rst_main); 240 241 compo->rst_aux = devm_reset_control_get(dev, "compo-aux"); 242 /* Take compo aux out of reset */ 243 if (!IS_ERR(compo->rst_aux)) 244 reset_control_deassert(compo->rst_aux); 245 246 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0); 247 if (vtg_np) 248 compo->vtg_main = of_vtg_find(vtg_np); 249 250 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1); 251 if (vtg_np) 252 compo->vtg_aux = of_vtg_find(vtg_np); 253 254 /* Initialize compositor subdevices */ 255 err = sti_compositor_init_subdev(compo, compo->data.subdev_desc, 256 compo->data.nb_subdev); 257 if (err) 258 return err; 259 260 platform_set_drvdata(pdev, compo); 261 262 return component_add(&pdev->dev, &sti_compositor_ops); 263 } 264 265 static int sti_compositor_remove(struct platform_device *pdev) 266 { 267 component_del(&pdev->dev, &sti_compositor_ops); 268 return 0; 269 } 270 271 static struct platform_driver sti_compositor_driver = { 272 .driver = { 273 .name = "sti-compositor", 274 .of_match_table = compositor_of_match, 275 }, 276 .probe = sti_compositor_probe, 277 .remove = sti_compositor_remove, 278 }; 279 280 module_platform_driver(sti_compositor_driver); 281 282 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); 283 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); 284 MODULE_LICENSE("GPL"); 285