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, unsigned int pipe)
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,
162 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
166 ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
168 dev_err(dev->dev, "read DCU_INT_MASK failed\n");
169 value |= DCU_INT_MASK_VBLANK;
170 ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
172 dev_err(dev->dev, "set DCU_INT_MASK failed\n");
175 static const struct file_operations fsl_dcu_drm_fops = {
176 .owner = THIS_MODULE,
178 .release = drm_release,
179 .unlocked_ioctl = drm_ioctl,
181 .compat_ioctl = drm_compat_ioctl,
186 .mmap = drm_gem_cma_mmap,
189 static struct drm_driver fsl_dcu_drm_driver = {
190 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
191 | DRIVER_PRIME | DRIVER_ATOMIC,
192 .load = fsl_dcu_load,
193 .unload = fsl_dcu_unload,
194 .preclose = fsl_dcu_drm_preclose,
195 .irq_handler = fsl_dcu_drm_irq,
196 .get_vblank_counter = drm_vblank_no_hw_counter,
197 .enable_vblank = fsl_dcu_drm_enable_vblank,
198 .disable_vblank = fsl_dcu_drm_disable_vblank,
199 .gem_free_object = drm_gem_cma_free_object,
200 .gem_vm_ops = &drm_gem_cma_vm_ops,
201 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
202 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
203 .gem_prime_import = drm_gem_prime_import,
204 .gem_prime_export = drm_gem_prime_export,
205 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
206 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
207 .gem_prime_vmap = drm_gem_cma_prime_vmap,
208 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
209 .gem_prime_mmap = drm_gem_cma_prime_mmap,
210 .dumb_create = drm_gem_cma_dumb_create,
211 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
212 .dumb_destroy = drm_gem_dumb_destroy,
213 .fops = &fsl_dcu_drm_fops,
214 .name = "fsl-dcu-drm",
215 .desc = "Freescale DCU DRM",
221 #ifdef CONFIG_PM_SLEEP
222 static int fsl_dcu_drm_pm_suspend(struct device *dev)
224 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
229 drm_kms_helper_poll_disable(fsl_dev->drm);
230 regcache_cache_only(fsl_dev->regmap, true);
231 regcache_mark_dirty(fsl_dev->regmap);
232 clk_disable(fsl_dev->clk);
233 clk_unprepare(fsl_dev->clk);
238 static int fsl_dcu_drm_pm_resume(struct device *dev)
240 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
246 ret = clk_enable(fsl_dev->clk);
248 dev_err(dev, "failed to enable dcu clk\n");
249 clk_unprepare(fsl_dev->clk);
252 ret = clk_prepare(fsl_dev->clk);
254 dev_err(dev, "failed to prepare dcu clk\n");
258 drm_kms_helper_poll_enable(fsl_dev->drm);
259 regcache_cache_only(fsl_dev->regmap, false);
260 regcache_sync(fsl_dev->regmap);
266 static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
267 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
270 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
276 static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
282 static const struct of_device_id fsl_dcu_of_match[] = {
284 .compatible = "fsl,ls1021a-dcu",
285 .data = &fsl_dcu_ls1021a_data,
287 .compatible = "fsl,vf610-dcu",
288 .data = &fsl_dcu_vf610_data,
292 MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
294 static int fsl_dcu_drm_probe(struct platform_device *pdev)
296 struct fsl_dcu_drm_device *fsl_dev;
297 struct drm_device *drm;
298 struct device *dev = &pdev->dev;
299 struct resource *res;
301 struct drm_driver *driver = &fsl_dcu_drm_driver;
302 const struct of_device_id *id;
305 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
309 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
311 dev_err(dev, "could not get memory IO resource\n");
315 base = devm_ioremap_resource(dev, res);
321 fsl_dev->irq = platform_get_irq(pdev, 0);
322 if (fsl_dev->irq < 0) {
323 dev_err(dev, "failed to get irq\n");
327 fsl_dev->clk = devm_clk_get(dev, "dcu");
328 if (IS_ERR(fsl_dev->clk)) {
329 ret = PTR_ERR(fsl_dev->clk);
330 dev_err(dev, "failed to get dcu clock\n");
333 ret = clk_prepare(fsl_dev->clk);
335 dev_err(dev, "failed to prepare dcu clk\n");
338 ret = clk_enable(fsl_dev->clk);
340 dev_err(dev, "failed to enable dcu clk\n");
341 clk_unprepare(fsl_dev->clk);
345 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
346 &fsl_dcu_regmap_config);
347 if (IS_ERR(fsl_dev->regmap)) {
348 dev_err(dev, "regmap init failed\n");
349 return PTR_ERR(fsl_dev->regmap);
352 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
355 fsl_dev->soc = id->data;
357 drm = drm_dev_alloc(driver, dev);
363 fsl_dev->np = dev->of_node;
364 drm->dev_private = fsl_dev;
365 dev_set_drvdata(dev, fsl_dev);
366 drm_dev_set_unique(drm, dev_name(dev));
368 ret = drm_dev_register(drm, 0);
372 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
373 driver->major, driver->minor, driver->patchlevel,
374 driver->date, drm->primary->index);
383 static int fsl_dcu_drm_remove(struct platform_device *pdev)
385 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
387 drm_put_dev(fsl_dev->drm);
392 static struct platform_driver fsl_dcu_drm_platform_driver = {
393 .probe = fsl_dcu_drm_probe,
394 .remove = fsl_dcu_drm_remove,
397 .pm = &fsl_dcu_drm_pm_ops,
398 .of_match_table = fsl_dcu_of_match,
402 module_platform_driver(fsl_dcu_drm_platform_driver);
404 MODULE_DESCRIPTION("Freescale DCU DRM Driver");
405 MODULE_LICENSE("GPL");