2 * Copyright 2015 Freescale Semiconductor, Inc.
4 * Freescale DCU drm device driver
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/clk.h>
13 #include <linux/clk-provider.h>
15 #include <linux/mfd/syscon.h>
17 #include <linux/module.h>
18 #include <linux/of_platform.h>
19 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/regmap.h>
25 #include <drm/drm_crtc_helper.h>
26 #include <drm/drm_gem_cma_helper.h>
28 #include "fsl_dcu_drm_crtc.h"
29 #include "fsl_dcu_drm_drv.h"
31 static const struct regmap_config fsl_dcu_regmap_config = {
35 .cache_type = REGCACHE_RBTREE,
38 static int fsl_dcu_drm_irq_init(struct drm_device *dev)
40 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
44 ret = drm_irq_install(dev, fsl_dev->irq);
46 dev_err(dev->dev, "failed to install IRQ handler\n");
48 ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
50 dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
51 ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
53 dev_err(dev->dev, "read DCU_INT_MASK failed\n");
54 value &= DCU_INT_MASK_VBLANK;
55 ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
57 dev_err(dev->dev, "set DCU_INT_MASK failed\n");
58 ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
59 DCU_UPDATE_MODE_READREG);
61 dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
66 static int fsl_dcu_load(struct drm_device *drm, unsigned long flags)
68 struct device *dev = drm->dev;
69 struct fsl_dcu_drm_device *fsl_dev = drm->dev_private;
72 ret = fsl_dcu_drm_modeset_init(fsl_dev);
74 dev_err(dev, "failed to initialize mode setting\n");
78 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
80 dev_err(dev, "failed to initialize vblank\n");
83 drm->vblank_disable_allowed = true;
85 ret = fsl_dcu_drm_irq_init(drm);
88 drm->irq_enabled = true;
90 fsl_dcu_fbdev_init(drm);
95 drm_mode_config_cleanup(drm);
96 drm_vblank_cleanup(drm);
97 drm_irq_uninstall(drm);
98 drm->dev_private = NULL;
104 static int fsl_dcu_unload(struct drm_device *dev)
106 drm_mode_config_cleanup(dev);
107 drm_vblank_cleanup(dev);
108 drm_irq_uninstall(dev);
110 dev->dev_private = NULL;
115 static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
117 struct drm_device *dev = arg;
118 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
119 unsigned int int_status;
122 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
124 dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
125 if (int_status & DCU_INT_STATUS_VBLANK)
126 drm_handle_vblank(dev, 0);
128 ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff);
130 dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
131 ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
132 DCU_UPDATE_MODE_READREG);
134 dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
139 static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
141 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
145 ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
147 dev_err(dev->dev, "read DCU_INT_MASK failed\n");
148 value &= ~DCU_INT_MASK_VBLANK;
149 ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
151 dev_err(dev->dev, "set DCU_INT_MASK failed\n");
155 static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
158 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
162 ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
164 dev_err(dev->dev, "read DCU_INT_MASK failed\n");
165 value |= DCU_INT_MASK_VBLANK;
166 ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
168 dev_err(dev->dev, "set DCU_INT_MASK failed\n");
171 static const struct file_operations fsl_dcu_drm_fops = {
172 .owner = THIS_MODULE,
174 .release = drm_release,
175 .unlocked_ioctl = drm_ioctl,
177 .compat_ioctl = drm_compat_ioctl,
182 .mmap = drm_gem_cma_mmap,
185 static struct drm_driver fsl_dcu_drm_driver = {
186 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
187 | DRIVER_PRIME | DRIVER_ATOMIC,
188 .load = fsl_dcu_load,
189 .unload = fsl_dcu_unload,
190 .irq_handler = fsl_dcu_drm_irq,
191 .get_vblank_counter = drm_vblank_no_hw_counter,
192 .enable_vblank = fsl_dcu_drm_enable_vblank,
193 .disable_vblank = fsl_dcu_drm_disable_vblank,
194 .gem_free_object = drm_gem_cma_free_object,
195 .gem_vm_ops = &drm_gem_cma_vm_ops,
196 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
197 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
198 .gem_prime_import = drm_gem_prime_import,
199 .gem_prime_export = drm_gem_prime_export,
200 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
201 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
202 .gem_prime_vmap = drm_gem_cma_prime_vmap,
203 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
204 .gem_prime_mmap = drm_gem_cma_prime_mmap,
205 .dumb_create = drm_gem_cma_dumb_create,
206 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
207 .dumb_destroy = drm_gem_dumb_destroy,
208 .fops = &fsl_dcu_drm_fops,
209 .name = "fsl-dcu-drm",
210 .desc = "Freescale DCU DRM",
216 #ifdef CONFIG_PM_SLEEP
217 static int fsl_dcu_drm_pm_suspend(struct device *dev)
219 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
224 drm_kms_helper_poll_disable(fsl_dev->drm);
225 regcache_cache_only(fsl_dev->regmap, true);
226 regcache_mark_dirty(fsl_dev->regmap);
227 clk_disable(fsl_dev->clk);
228 clk_unprepare(fsl_dev->clk);
233 static int fsl_dcu_drm_pm_resume(struct device *dev)
235 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
241 ret = clk_enable(fsl_dev->clk);
243 dev_err(dev, "failed to enable dcu clk\n");
244 clk_unprepare(fsl_dev->clk);
247 ret = clk_prepare(fsl_dev->clk);
249 dev_err(dev, "failed to prepare dcu clk\n");
253 drm_kms_helper_poll_enable(fsl_dev->drm);
254 regcache_cache_only(fsl_dev->regmap, false);
255 regcache_sync(fsl_dev->regmap);
261 static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
262 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
265 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
271 static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
277 static const struct of_device_id fsl_dcu_of_match[] = {
279 .compatible = "fsl,ls1021a-dcu",
280 .data = &fsl_dcu_ls1021a_data,
282 .compatible = "fsl,vf610-dcu",
283 .data = &fsl_dcu_vf610_data,
287 MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
289 static int fsl_dcu_drm_probe(struct platform_device *pdev)
291 struct fsl_dcu_drm_device *fsl_dev;
292 struct drm_device *drm;
293 struct device *dev = &pdev->dev;
294 struct resource *res;
296 struct drm_driver *driver = &fsl_dcu_drm_driver;
297 const struct of_device_id *id;
300 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
304 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
306 dev_err(dev, "could not get memory IO resource\n");
310 base = devm_ioremap_resource(dev, res);
316 fsl_dev->irq = platform_get_irq(pdev, 0);
317 if (fsl_dev->irq < 0) {
318 dev_err(dev, "failed to get irq\n");
322 fsl_dev->clk = devm_clk_get(dev, "dcu");
323 if (IS_ERR(fsl_dev->clk)) {
324 ret = PTR_ERR(fsl_dev->clk);
325 dev_err(dev, "failed to get dcu clock\n");
328 ret = clk_prepare(fsl_dev->clk);
330 dev_err(dev, "failed to prepare dcu clk\n");
333 ret = clk_enable(fsl_dev->clk);
335 dev_err(dev, "failed to enable dcu clk\n");
336 clk_unprepare(fsl_dev->clk);
340 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
341 &fsl_dcu_regmap_config);
342 if (IS_ERR(fsl_dev->regmap)) {
343 dev_err(dev, "regmap init failed\n");
344 return PTR_ERR(fsl_dev->regmap);
347 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
350 fsl_dev->soc = id->data;
352 drm = drm_dev_alloc(driver, dev);
358 fsl_dev->np = dev->of_node;
359 drm->dev_private = fsl_dev;
360 dev_set_drvdata(dev, fsl_dev);
362 ret = drm_dev_register(drm, 0);
366 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
367 driver->major, driver->minor, driver->patchlevel,
368 driver->date, drm->primary->index);
377 static int fsl_dcu_drm_remove(struct platform_device *pdev)
379 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
381 drm_put_dev(fsl_dev->drm);
386 static struct platform_driver fsl_dcu_drm_platform_driver = {
387 .probe = fsl_dcu_drm_probe,
388 .remove = fsl_dcu_drm_remove,
391 .pm = &fsl_dcu_drm_pm_ops,
392 .of_match_table = fsl_dcu_of_match,
396 module_platform_driver(fsl_dcu_drm_platform_driver);
398 MODULE_DESCRIPTION("Freescale DCU DRM Driver");
399 MODULE_LICENSE("GPL");