Commit | Line | Data |
---|---|---|
59104f23 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
51c13278 LP |
2 | /* |
3 | * shmob_drm_drv.c -- SH Mobile DRM driver | |
4 | * | |
9588b826 | 5 | * Copyright (C) 2012 Renesas Electronics Corporation |
51c13278 LP |
6 | * |
7 | * Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
51c13278 LP |
8 | */ |
9 | ||
10 | #include <linux/clk.h> | |
11 | #include <linux/io.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/pm.h> | |
16 | #include <linux/slab.h> | |
17 | ||
18 | #include <drm/drmP.h> | |
19 | #include <drm/drm_crtc_helper.h> | |
20 | #include <drm/drm_gem_cma_helper.h> | |
fcd70cd3 | 21 | #include <drm/drm_probe_helper.h> |
51c13278 | 22 | |
51c13278 LP |
23 | #include "shmob_drm_drv.h" |
24 | #include "shmob_drm_kms.h" | |
25 | #include "shmob_drm_plane.h" | |
26 | #include "shmob_drm_regs.h" | |
27 | ||
28 | /* ----------------------------------------------------------------------------- | |
29 | * Hardware initialization | |
30 | */ | |
31 | ||
56550d94 | 32 | static int shmob_drm_init_interface(struct shmob_drm_device *sdev) |
51c13278 LP |
33 | { |
34 | static const u32 ldmt1r[] = { | |
35 | [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8, | |
36 | [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9, | |
37 | [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A, | |
38 | [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B, | |
39 | [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16, | |
40 | [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18, | |
41 | [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24, | |
42 | [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR, | |
43 | [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A, | |
44 | [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B, | |
45 | [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C, | |
46 | [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D, | |
47 | [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9, | |
48 | [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12, | |
49 | [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A, | |
50 | [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B, | |
51 | [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C, | |
52 | [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18, | |
53 | [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24, | |
54 | }; | |
55 | ||
56 | if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) { | |
57 | dev_err(sdev->dev, "invalid interface type %u\n", | |
58 | sdev->pdata->iface.interface); | |
59 | return -EINVAL; | |
60 | } | |
61 | ||
62 | sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface]; | |
63 | return 0; | |
64 | } | |
65 | ||
56550d94 | 66 | static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev, |
51c13278 LP |
67 | enum shmob_drm_clk_source clksrc) |
68 | { | |
69 | struct clk *clk; | |
70 | char *clkname; | |
71 | ||
72 | switch (clksrc) { | |
73 | case SHMOB_DRM_CLK_BUS: | |
74 | clkname = "bus_clk"; | |
75 | sdev->lddckr = LDDCKR_ICKSEL_BUS; | |
76 | break; | |
77 | case SHMOB_DRM_CLK_PERIPHERAL: | |
78 | clkname = "peripheral_clk"; | |
79 | sdev->lddckr = LDDCKR_ICKSEL_MIPI; | |
80 | break; | |
81 | case SHMOB_DRM_CLK_EXTERNAL: | |
82 | clkname = NULL; | |
83 | sdev->lddckr = LDDCKR_ICKSEL_HDMI; | |
84 | break; | |
85 | default: | |
86 | return -EINVAL; | |
87 | } | |
88 | ||
16ad3b2c | 89 | clk = devm_clk_get(sdev->dev, clkname); |
51c13278 LP |
90 | if (IS_ERR(clk)) { |
91 | dev_err(sdev->dev, "cannot get dot clock %s\n", clkname); | |
92 | return PTR_ERR(clk); | |
93 | } | |
94 | ||
95 | sdev->clock = clk; | |
96 | return 0; | |
97 | } | |
98 | ||
99 | /* ----------------------------------------------------------------------------- | |
100 | * DRM operations | |
101 | */ | |
102 | ||
51c13278 LP |
103 | static irqreturn_t shmob_drm_irq(int irq, void *arg) |
104 | { | |
105 | struct drm_device *dev = arg; | |
106 | struct shmob_drm_device *sdev = dev->dev_private; | |
107 | unsigned long flags; | |
108 | u32 status; | |
109 | ||
110 | /* Acknowledge interrupts. Putting interrupt enable and interrupt flag | |
111 | * bits in the same register is really brain-dead design and requires | |
112 | * taking a spinlock. | |
113 | */ | |
114 | spin_lock_irqsave(&sdev->irq_lock, flags); | |
115 | status = lcdc_read(sdev, LDINTR); | |
116 | lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK); | |
117 | spin_unlock_irqrestore(&sdev->irq_lock, flags); | |
118 | ||
119 | if (status & LDINTR_VES) { | |
120 | drm_handle_vblank(dev, 0); | |
121 | shmob_drm_crtc_finish_page_flip(&sdev->crtc); | |
122 | } | |
123 | ||
124 | return IRQ_HANDLED; | |
125 | } | |
126 | ||
d55f7e5d | 127 | DEFINE_DRM_GEM_CMA_FOPS(shmob_drm_fops); |
51c13278 LP |
128 | |
129 | static struct drm_driver shmob_drm_driver = { | |
416c3900 LP |
130 | .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET |
131 | | DRIVER_PRIME, | |
51c13278 | 132 | .irq_handler = shmob_drm_irq, |
6fde01dc | 133 | .gem_free_object_unlocked = drm_gem_cma_free_object, |
51c13278 | 134 | .gem_vm_ops = &drm_gem_cma_vm_ops, |
416c3900 LP |
135 | .prime_handle_to_fd = drm_gem_prime_handle_to_fd, |
136 | .prime_fd_to_handle = drm_gem_prime_fd_to_handle, | |
58cbd3ac LP |
137 | .gem_prime_import = drm_gem_prime_import, |
138 | .gem_prime_export = drm_gem_prime_export, | |
139 | .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, | |
140 | .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, | |
141 | .gem_prime_vmap = drm_gem_cma_prime_vmap, | |
142 | .gem_prime_vunmap = drm_gem_cma_prime_vunmap, | |
143 | .gem_prime_mmap = drm_gem_cma_prime_mmap, | |
51c13278 | 144 | .dumb_create = drm_gem_cma_dumb_create, |
51c13278 LP |
145 | .fops = &shmob_drm_fops, |
146 | .name = "shmob-drm", | |
147 | .desc = "Renesas SH Mobile DRM", | |
148 | .date = "20120424", | |
149 | .major = 1, | |
150 | .minor = 0, | |
151 | }; | |
152 | ||
153 | /* ----------------------------------------------------------------------------- | |
154 | * Power management | |
155 | */ | |
156 | ||
681ff260 | 157 | #ifdef CONFIG_PM_SLEEP |
51c13278 LP |
158 | static int shmob_drm_pm_suspend(struct device *dev) |
159 | { | |
a16d4f86 | 160 | struct shmob_drm_device *sdev = dev_get_drvdata(dev); |
51c13278 | 161 | |
a16d4f86 | 162 | drm_kms_helper_poll_disable(sdev->ddev); |
51c13278 LP |
163 | shmob_drm_crtc_suspend(&sdev->crtc); |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static int shmob_drm_pm_resume(struct device *dev) | |
169 | { | |
a16d4f86 | 170 | struct shmob_drm_device *sdev = dev_get_drvdata(dev); |
51c13278 | 171 | |
b13f5980 | 172 | drm_modeset_lock_all(sdev->ddev); |
51c13278 | 173 | shmob_drm_crtc_resume(&sdev->crtc); |
b13f5980 | 174 | drm_modeset_unlock_all(sdev->ddev); |
51c13278 LP |
175 | |
176 | drm_kms_helper_poll_enable(sdev->ddev); | |
177 | return 0; | |
178 | } | |
179 | #endif | |
180 | ||
181 | static const struct dev_pm_ops shmob_drm_pm_ops = { | |
182 | SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume) | |
183 | }; | |
184 | ||
185 | /* ----------------------------------------------------------------------------- | |
186 | * Platform driver | |
187 | */ | |
188 | ||
8f1597c8 | 189 | static int shmob_drm_remove(struct platform_device *pdev) |
51c13278 | 190 | { |
8f1597c8 LP |
191 | struct shmob_drm_device *sdev = platform_get_drvdata(pdev); |
192 | struct drm_device *ddev = sdev->ddev; | |
193 | ||
194 | drm_dev_unregister(ddev); | |
195 | drm_kms_helper_poll_fini(ddev); | |
196 | drm_mode_config_cleanup(ddev); | |
197 | drm_irq_uninstall(ddev); | |
c0ece674 | 198 | drm_dev_put(ddev); |
8f1597c8 LP |
199 | |
200 | return 0; | |
51c13278 LP |
201 | } |
202 | ||
8f1597c8 | 203 | static int shmob_drm_probe(struct platform_device *pdev) |
51c13278 | 204 | { |
8f1597c8 LP |
205 | struct shmob_drm_platform_data *pdata = pdev->dev.platform_data; |
206 | struct shmob_drm_device *sdev; | |
207 | struct drm_device *ddev; | |
208 | struct resource *res; | |
209 | unsigned int i; | |
210 | int ret; | |
211 | ||
212 | if (pdata == NULL) { | |
213 | dev_err(&pdev->dev, "no platform data\n"); | |
214 | return -EINVAL; | |
215 | } | |
405bea7a | 216 | |
8f1597c8 LP |
217 | /* |
218 | * Allocate and initialize the driver private data, I/O resources and | |
219 | * clocks. | |
220 | */ | |
221 | sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL); | |
222 | if (sdev == NULL) | |
223 | return -ENOMEM; | |
224 | ||
225 | sdev->dev = &pdev->dev; | |
226 | sdev->pdata = pdata; | |
227 | spin_lock_init(&sdev->irq_lock); | |
228 | ||
229 | platform_set_drvdata(pdev, sdev); | |
230 | ||
231 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
232 | sdev->mmio = devm_ioremap_resource(&pdev->dev, res); | |
06c3bbd3 Y |
233 | if (IS_ERR(sdev->mmio)) |
234 | return PTR_ERR(sdev->mmio); | |
8f1597c8 LP |
235 | |
236 | ret = shmob_drm_setup_clocks(sdev, pdata->clk_source); | |
237 | if (ret < 0) | |
238 | return ret; | |
239 | ||
240 | ret = shmob_drm_init_interface(sdev); | |
241 | if (ret < 0) | |
242 | return ret; | |
243 | ||
244 | /* Allocate and initialize the DRM device. */ | |
245 | ddev = drm_dev_alloc(&shmob_drm_driver, &pdev->dev); | |
246 | if (IS_ERR(ddev)) | |
247 | return PTR_ERR(ddev); | |
248 | ||
249 | sdev->ddev = ddev; | |
250 | ddev->dev_private = sdev; | |
251 | ||
252 | ret = shmob_drm_modeset_init(sdev); | |
253 | if (ret < 0) { | |
254 | dev_err(&pdev->dev, "failed to initialize mode setting\n"); | |
255 | goto err_free_drm_dev; | |
256 | } | |
257 | ||
258 | for (i = 0; i < 4; ++i) { | |
259 | ret = shmob_drm_plane_create(sdev, i); | |
260 | if (ret < 0) { | |
261 | dev_err(&pdev->dev, "failed to create plane %u\n", i); | |
262 | goto err_modeset_cleanup; | |
263 | } | |
264 | } | |
265 | ||
266 | ret = drm_vblank_init(ddev, 1); | |
267 | if (ret < 0) { | |
268 | dev_err(&pdev->dev, "failed to initialize vblank\n"); | |
269 | goto err_modeset_cleanup; | |
270 | } | |
271 | ||
272 | ret = drm_irq_install(ddev, platform_get_irq(pdev, 0)); | |
273 | if (ret < 0) { | |
274 | dev_err(&pdev->dev, "failed to install IRQ handler\n"); | |
10f98183 | 275 | goto err_modeset_cleanup; |
8f1597c8 LP |
276 | } |
277 | ||
278 | /* | |
279 | * Register the DRM device with the core and the connectors with | |
280 | * sysfs. | |
281 | */ | |
282 | ret = drm_dev_register(ddev, 0); | |
283 | if (ret < 0) | |
284 | goto err_irq_uninstall; | |
51c13278 LP |
285 | |
286 | return 0; | |
8f1597c8 LP |
287 | |
288 | err_irq_uninstall: | |
289 | drm_irq_uninstall(ddev); | |
8f1597c8 LP |
290 | err_modeset_cleanup: |
291 | drm_kms_helper_poll_fini(ddev); | |
292 | drm_mode_config_cleanup(ddev); | |
293 | err_free_drm_dev: | |
c0ece674 | 294 | drm_dev_put(ddev); |
8f1597c8 LP |
295 | |
296 | return ret; | |
51c13278 LP |
297 | } |
298 | ||
299 | static struct platform_driver shmob_drm_platform_driver = { | |
300 | .probe = shmob_drm_probe, | |
56550d94 | 301 | .remove = shmob_drm_remove, |
51c13278 | 302 | .driver = { |
51c13278 LP |
303 | .name = "shmob-drm", |
304 | .pm = &shmob_drm_pm_ops, | |
305 | }, | |
306 | }; | |
307 | ||
308 | module_platform_driver(shmob_drm_platform_driver); | |
309 | ||
310 | MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); | |
311 | MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver"); | |
312 | MODULE_LICENSE("GPL"); |