2 * Copyright (C) STMicroelectronics SA 2014
5 * for STMicroelectronics.
6 * License terms: GNU General Public License (GPL), version 2
9 #include <linux/component.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/reset.h>
16 #include "sti_compositor.h"
17 #include "sti_drm_crtc.h"
18 #include "sti_drm_drv.h"
19 #include "sti_drm_plane.h"
24 * stiH407 compositor properties
26 struct sti_compositor_data stih407_compositor_data = {
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},
41 * stiH416 compositor properties
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.
47 struct sti_compositor_data stih416_compositor_data = {
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}
56 static int sti_compositor_init_subdev(struct sti_compositor *compo,
57 struct sti_compositor_subdev_descriptor *desc,
58 unsigned int array_size)
60 unsigned int i, mixer_id = 0, layer_id = 0;
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);
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);
78 DRM_ERROR("Unknow subdev compoment type\n");
83 compo->nb_mixers = mixer_id;
84 compo->nb_layers = layer_id;
89 static int sti_compositor_bind(struct device *dev, struct device *master,
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;
99 dev_priv->compo = compo;
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;
107 if (crtc < compo->nb_mixers)
108 plane_type = DRM_PLANE_TYPE_PRIMARY;
112 cursor = sti_drm_plane_init(drm_dev,
114 1, DRM_PLANE_TYPE_CURSOR);
118 primary = sti_drm_plane_init(drm_dev,
120 (1 << compo->nb_mixers) - 1,
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],
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;
144 DRM_DEBUG_DRIVER("Initialized %d DRM CRTC(s) and %d DRM plane(s)\n",
146 DRM_DEBUG_DRIVER("DRM plane(s) for VID/VDP not created yet\n");
151 static void sti_compositor_unbind(struct device *dev, struct device *master,
157 static const struct component_ops sti_compositor_ops = {
158 .bind = sti_compositor_bind,
159 .unbind = sti_compositor_unbind,
162 static const struct of_device_id compositor_of_match[] = {
164 .compatible = "st,stih416-compositor",
165 .data = &stih416_compositor_data,
167 .compatible = "st,stih407-compositor",
168 .data = &stih407_compositor_data,
173 MODULE_DEVICE_TABLE(of, compositor_of_match);
175 static int sti_compositor_probe(struct platform_device *pdev)
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;
184 compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
186 DRM_ERROR("Failed to allocate compositor context\n");
190 compo->vtg_vblank_nb.notifier_call = sti_drm_crtc_vblank_cb;
192 /* populate data structure depending on compatibility */
193 BUG_ON(!of_match_node(compositor_of_match, np)->data);
195 memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
196 sizeof(struct sti_compositor_data));
198 /* Get Memory ressources */
199 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
201 DRM_ERROR("Get memory resource failed\n");
204 compo->regs = devm_ioremap(dev, res->start, resource_size(res));
205 if (compo->regs == NULL) {
206 DRM_ERROR("Register mapping failed\n");
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);
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);
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);
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);
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);
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);
246 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
248 compo->vtg_main = of_vtg_find(vtg_np);
250 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
252 compo->vtg_aux = of_vtg_find(vtg_np);
254 /* Initialize compositor subdevices */
255 err = sti_compositor_init_subdev(compo, compo->data.subdev_desc,
256 compo->data.nb_subdev);
260 platform_set_drvdata(pdev, compo);
262 return component_add(&pdev->dev, &sti_compositor_ops);
265 static int sti_compositor_remove(struct platform_device *pdev)
267 component_del(&pdev->dev, &sti_compositor_ops);
271 static struct platform_driver sti_compositor_driver = {
273 .name = "sti-compositor",
274 .of_match_table = compositor_of_match,
276 .probe = sti_compositor_probe,
277 .remove = sti_compositor_remove,
280 module_platform_driver(sti_compositor_driver);
283 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
284 MODULE_LICENSE("GPL");