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 void fsl_dcu_drm_preclose(struct drm_device *dev, struct drm_file *file)
119 static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
121 struct drm_device *dev = arg;
122 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
123 unsigned int int_status;
126 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
128 dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
129 if (int_status & DCU_INT_STATUS_VBLANK)
130 drm_handle_vblank(dev, 0);
132 ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff);
134 dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
135 ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
136 DCU_UPDATE_MODE_READREG);
138 dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
143 static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, int crtc)
145 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
149 ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
151 dev_err(dev->dev, "read DCU_INT_MASK failed\n");
152 value &= ~DCU_INT_MASK_VBLANK;
153 ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
155 dev_err(dev->dev, "set DCU_INT_MASK failed\n");
159 static void fsl_dcu_drm_disable_vblank(struct drm_device *dev, int crtc)
161 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
165 ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
167 dev_err(dev->dev, "read DCU_INT_MASK failed\n");
168 value |= DCU_INT_MASK_VBLANK;
169 ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
171 dev_err(dev->dev, "set DCU_INT_MASK failed\n");
174 static const struct file_operations fsl_dcu_drm_fops = {
175 .owner = THIS_MODULE,
177 .release = drm_release,
178 .unlocked_ioctl = drm_ioctl,
180 .compat_ioctl = drm_compat_ioctl,
185 .mmap = drm_gem_cma_mmap,
188 static struct drm_driver fsl_dcu_drm_driver = {
189 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
190 | DRIVER_PRIME | DRIVER_ATOMIC,
191 .load = fsl_dcu_load,
192 .unload = fsl_dcu_unload,
193 .preclose = fsl_dcu_drm_preclose,
194 .irq_handler = fsl_dcu_drm_irq,
195 .get_vblank_counter = drm_vblank_count,
196 .enable_vblank = fsl_dcu_drm_enable_vblank,
197 .disable_vblank = fsl_dcu_drm_disable_vblank,
198 .gem_free_object = drm_gem_cma_free_object,
199 .gem_vm_ops = &drm_gem_cma_vm_ops,
200 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
201 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
202 .gem_prime_import = drm_gem_prime_import,
203 .gem_prime_export = drm_gem_prime_export,
204 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
205 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
206 .gem_prime_vmap = drm_gem_cma_prime_vmap,
207 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
208 .gem_prime_mmap = drm_gem_cma_prime_mmap,
209 .dumb_create = drm_gem_cma_dumb_create,
210 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
211 .dumb_destroy = drm_gem_dumb_destroy,
212 .fops = &fsl_dcu_drm_fops,
213 .name = "fsl-dcu-drm",
214 .desc = "Freescale DCU DRM",
220 #ifdef CONFIG_PM_SLEEP
221 static int fsl_dcu_drm_pm_suspend(struct device *dev)
223 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
228 drm_kms_helper_poll_disable(fsl_dev->drm);
229 regcache_cache_only(fsl_dev->regmap, true);
230 regcache_mark_dirty(fsl_dev->regmap);
231 clk_disable(fsl_dev->clk);
232 clk_unprepare(fsl_dev->clk);
237 static int fsl_dcu_drm_pm_resume(struct device *dev)
239 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
245 ret = clk_enable(fsl_dev->clk);
247 dev_err(dev, "failed to enable dcu clk\n");
248 clk_unprepare(fsl_dev->clk);
251 ret = clk_prepare(fsl_dev->clk);
253 dev_err(dev, "failed to prepare dcu clk\n");
257 drm_kms_helper_poll_enable(fsl_dev->drm);
258 regcache_cache_only(fsl_dev->regmap, false);
259 regcache_sync(fsl_dev->regmap);
265 static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
266 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
269 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
275 static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
281 static const struct of_device_id fsl_dcu_of_match[] = {
283 .compatible = "fsl,ls1021a-dcu",
284 .data = &fsl_dcu_ls1021a_data,
286 .compatible = "fsl,vf610-dcu",
287 .data = &fsl_dcu_vf610_data,
291 MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
293 static int fsl_dcu_drm_probe(struct platform_device *pdev)
295 struct fsl_dcu_drm_device *fsl_dev;
296 struct drm_device *drm;
297 struct device *dev = &pdev->dev;
298 struct resource *res;
300 struct drm_driver *driver = &fsl_dcu_drm_driver;
301 const struct of_device_id *id;
304 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
308 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
310 dev_err(dev, "could not get memory IO resource\n");
314 base = devm_ioremap_resource(dev, res);
320 fsl_dev->irq = platform_get_irq(pdev, 0);
321 if (fsl_dev->irq < 0) {
322 dev_err(dev, "failed to get irq\n");
326 fsl_dev->clk = devm_clk_get(dev, "dcu");
327 if (IS_ERR(fsl_dev->clk)) {
328 ret = PTR_ERR(fsl_dev->clk);
329 dev_err(dev, "failed to get dcu clock\n");
332 ret = clk_prepare(fsl_dev->clk);
334 dev_err(dev, "failed to prepare dcu clk\n");
337 ret = clk_enable(fsl_dev->clk);
339 dev_err(dev, "failed to enable dcu clk\n");
340 clk_unprepare(fsl_dev->clk);
344 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
345 &fsl_dcu_regmap_config);
346 if (IS_ERR(fsl_dev->regmap)) {
347 dev_err(dev, "regmap init failed\n");
348 return PTR_ERR(fsl_dev->regmap);
351 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
354 fsl_dev->soc = id->data;
356 drm = drm_dev_alloc(driver, dev);
362 fsl_dev->np = dev->of_node;
363 drm->dev_private = fsl_dev;
364 dev_set_drvdata(dev, fsl_dev);
365 drm_dev_set_unique(drm, dev_name(dev));
367 ret = drm_dev_register(drm, 0);
371 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
372 driver->major, driver->minor, driver->patchlevel,
373 driver->date, drm->primary->index);
382 static int fsl_dcu_drm_remove(struct platform_device *pdev)
384 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
386 drm_put_dev(fsl_dev->drm);
391 static struct platform_driver fsl_dcu_drm_platform_driver = {
392 .probe = fsl_dcu_drm_probe,
393 .remove = fsl_dcu_drm_remove,
396 .pm = &fsl_dcu_drm_pm_ops,
397 .of_match_table = fsl_dcu_of_match,
401 module_platform_driver(fsl_dcu_drm_platform_driver);
403 MODULE_DESCRIPTION("Freescale DCU DRM Driver");
404 MODULE_LICENSE("GPL");