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 bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
33 if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
39 static const struct regmap_config fsl_dcu_regmap_config = {
43 .cache_type = REGCACHE_RBTREE,
45 .volatile_reg = fsl_dcu_drm_is_volatile_reg,
48 static int fsl_dcu_drm_irq_init(struct drm_device *dev)
50 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
53 ret = drm_irq_install(dev, fsl_dev->irq);
55 dev_err(dev->dev, "failed to install IRQ handler\n");
57 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
58 regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
59 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
60 DCU_UPDATE_MODE_READREG);
65 static int fsl_dcu_load(struct drm_device *drm, unsigned long flags)
67 struct device *dev = drm->dev;
68 struct fsl_dcu_drm_device *fsl_dev = drm->dev_private;
71 ret = fsl_dcu_drm_modeset_init(fsl_dev);
73 dev_err(dev, "failed to initialize mode setting\n");
77 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
79 dev_err(dev, "failed to initialize vblank\n");
82 drm->vblank_disable_allowed = true;
84 ret = fsl_dcu_drm_irq_init(drm);
87 drm->irq_enabled = true;
89 fsl_dcu_fbdev_init(drm);
94 drm_mode_config_cleanup(drm);
95 drm_vblank_cleanup(drm);
96 drm_irq_uninstall(drm);
97 drm->dev_private = NULL;
103 static int fsl_dcu_unload(struct drm_device *dev)
105 drm_mode_config_cleanup(dev);
106 drm_vblank_cleanup(dev);
107 drm_irq_uninstall(dev);
109 dev->dev_private = NULL;
114 static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
116 struct drm_device *dev = arg;
117 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
118 unsigned int int_status;
121 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
123 dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
127 if (int_status & DCU_INT_STATUS_VBLANK)
128 drm_handle_vblank(dev, 0);
130 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
131 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
132 DCU_UPDATE_MODE_READREG);
137 static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
139 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
142 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
143 value &= ~DCU_INT_MASK_VBLANK;
144 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
149 static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
152 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
155 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
156 value |= DCU_INT_MASK_VBLANK;
157 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
160 static const struct file_operations fsl_dcu_drm_fops = {
161 .owner = THIS_MODULE,
163 .release = drm_release,
164 .unlocked_ioctl = drm_ioctl,
166 .compat_ioctl = drm_compat_ioctl,
171 .mmap = drm_gem_cma_mmap,
174 static struct drm_driver fsl_dcu_drm_driver = {
175 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
176 | DRIVER_PRIME | DRIVER_ATOMIC,
177 .load = fsl_dcu_load,
178 .unload = fsl_dcu_unload,
179 .irq_handler = fsl_dcu_drm_irq,
180 .get_vblank_counter = drm_vblank_no_hw_counter,
181 .enable_vblank = fsl_dcu_drm_enable_vblank,
182 .disable_vblank = fsl_dcu_drm_disable_vblank,
183 .gem_free_object = drm_gem_cma_free_object,
184 .gem_vm_ops = &drm_gem_cma_vm_ops,
185 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
186 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
187 .gem_prime_import = drm_gem_prime_import,
188 .gem_prime_export = drm_gem_prime_export,
189 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
190 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
191 .gem_prime_vmap = drm_gem_cma_prime_vmap,
192 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
193 .gem_prime_mmap = drm_gem_cma_prime_mmap,
194 .dumb_create = drm_gem_cma_dumb_create,
195 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
196 .dumb_destroy = drm_gem_dumb_destroy,
197 .fops = &fsl_dcu_drm_fops,
198 .name = "fsl-dcu-drm",
199 .desc = "Freescale DCU DRM",
205 #ifdef CONFIG_PM_SLEEP
206 static int fsl_dcu_drm_pm_suspend(struct device *dev)
208 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
213 drm_kms_helper_poll_disable(fsl_dev->drm);
214 regcache_cache_only(fsl_dev->regmap, true);
215 regcache_mark_dirty(fsl_dev->regmap);
216 clk_disable(fsl_dev->clk);
217 clk_unprepare(fsl_dev->clk);
222 static int fsl_dcu_drm_pm_resume(struct device *dev)
224 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
230 ret = clk_enable(fsl_dev->clk);
232 dev_err(dev, "failed to enable dcu clk\n");
233 clk_unprepare(fsl_dev->clk);
236 ret = clk_prepare(fsl_dev->clk);
238 dev_err(dev, "failed to prepare dcu clk\n");
242 drm_kms_helper_poll_enable(fsl_dev->drm);
243 regcache_cache_only(fsl_dev->regmap, false);
244 regcache_sync(fsl_dev->regmap);
250 static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
251 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
254 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
260 static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
266 static const struct of_device_id fsl_dcu_of_match[] = {
268 .compatible = "fsl,ls1021a-dcu",
269 .data = &fsl_dcu_ls1021a_data,
271 .compatible = "fsl,vf610-dcu",
272 .data = &fsl_dcu_vf610_data,
276 MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
278 static int fsl_dcu_drm_probe(struct platform_device *pdev)
280 struct fsl_dcu_drm_device *fsl_dev;
281 struct drm_device *drm;
282 struct device *dev = &pdev->dev;
283 struct resource *res;
285 struct drm_driver *driver = &fsl_dcu_drm_driver;
286 const struct of_device_id *id;
289 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
293 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
295 dev_err(dev, "could not get memory IO resource\n");
299 base = devm_ioremap_resource(dev, res);
305 fsl_dev->irq = platform_get_irq(pdev, 0);
306 if (fsl_dev->irq < 0) {
307 dev_err(dev, "failed to get irq\n");
311 fsl_dev->clk = devm_clk_get(dev, "dcu");
312 if (IS_ERR(fsl_dev->clk)) {
313 ret = PTR_ERR(fsl_dev->clk);
314 dev_err(dev, "failed to get dcu clock\n");
317 ret = clk_prepare(fsl_dev->clk);
319 dev_err(dev, "failed to prepare dcu clk\n");
322 ret = clk_enable(fsl_dev->clk);
324 dev_err(dev, "failed to enable dcu clk\n");
325 clk_unprepare(fsl_dev->clk);
329 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
330 &fsl_dcu_regmap_config);
331 if (IS_ERR(fsl_dev->regmap)) {
332 dev_err(dev, "regmap init failed\n");
333 return PTR_ERR(fsl_dev->regmap);
336 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
339 fsl_dev->soc = id->data;
341 drm = drm_dev_alloc(driver, dev);
347 fsl_dev->np = dev->of_node;
348 drm->dev_private = fsl_dev;
349 dev_set_drvdata(dev, fsl_dev);
351 ret = drm_dev_register(drm, 0);
355 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
356 driver->major, driver->minor, driver->patchlevel,
357 driver->date, drm->primary->index);
366 static int fsl_dcu_drm_remove(struct platform_device *pdev)
368 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
370 drm_put_dev(fsl_dev->drm);
375 static struct platform_driver fsl_dcu_drm_platform_driver = {
376 .probe = fsl_dcu_drm_probe,
377 .remove = fsl_dcu_drm_remove,
380 .pm = &fsl_dcu_drm_pm_ops,
381 .of_match_table = fsl_dcu_of_match,
385 module_platform_driver(fsl_dcu_drm_platform_driver);
387 MODULE_DESCRIPTION("Freescale DCU DRM Driver");
388 MODULE_LICENSE("GPL");