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