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_fb_cma_helper.h>
27 #include <drm/drm_gem_cma_helper.h>
29 #include "fsl_dcu_drm_crtc.h"
30 #include "fsl_dcu_drm_drv.h"
33 static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
35 if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
41 static const struct regmap_config fsl_dcu_regmap_config = {
45 .cache_type = REGCACHE_RBTREE,
47 .volatile_reg = fsl_dcu_drm_is_volatile_reg,
50 static int fsl_dcu_drm_irq_init(struct drm_device *dev)
52 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
55 ret = drm_irq_install(dev, fsl_dev->irq);
57 dev_err(dev->dev, "failed to install IRQ handler\n");
59 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
60 regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
61 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
62 DCU_UPDATE_MODE_READREG);
67 static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
69 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
72 ret = fsl_dcu_drm_modeset_init(fsl_dev);
74 dev_err(dev->dev, "failed to initialize mode setting\n");
78 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
80 dev_err(dev->dev, "failed to initialize vblank\n");
84 ret = fsl_dcu_drm_irq_init(dev);
87 dev->irq_enabled = true;
89 fsl_dcu_fbdev_init(dev);
93 drm_kms_helper_poll_fini(dev);
96 drm_fbdev_cma_fini(fsl_dev->fbdev);
98 drm_mode_config_cleanup(dev);
99 drm_vblank_cleanup(dev);
100 drm_irq_uninstall(dev);
101 dev->dev_private = NULL;
106 static int fsl_dcu_unload(struct drm_device *dev)
108 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
110 drm_kms_helper_poll_fini(dev);
113 drm_fbdev_cma_fini(fsl_dev->fbdev);
115 drm_mode_config_cleanup(dev);
116 drm_vblank_cleanup(dev);
117 drm_irq_uninstall(dev);
119 dev->dev_private = NULL;
124 static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
126 struct drm_device *dev = arg;
127 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
128 unsigned int int_status;
131 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
133 dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
137 if (int_status & DCU_INT_STATUS_VBLANK)
138 drm_handle_vblank(dev, 0);
140 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
141 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
142 DCU_UPDATE_MODE_READREG);
147 static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
149 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
152 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
153 value &= ~DCU_INT_MASK_VBLANK;
154 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
159 static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
162 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
165 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
166 value |= DCU_INT_MASK_VBLANK;
167 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
170 static void fsl_dcu_drm_lastclose(struct drm_device *dev)
172 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
174 drm_fbdev_cma_restore_mode(fsl_dev->fbdev);
177 static const struct file_operations fsl_dcu_drm_fops = {
178 .owner = THIS_MODULE,
180 .release = drm_release,
181 .unlocked_ioctl = drm_ioctl,
183 .compat_ioctl = drm_compat_ioctl,
188 .mmap = drm_gem_cma_mmap,
191 static struct drm_driver fsl_dcu_drm_driver = {
192 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
193 | DRIVER_PRIME | DRIVER_ATOMIC,
194 .lastclose = fsl_dcu_drm_lastclose,
195 .load = fsl_dcu_load,
196 .unload = fsl_dcu_unload,
197 .irq_handler = fsl_dcu_drm_irq,
198 .get_vblank_counter = drm_vblank_no_hw_counter,
199 .enable_vblank = fsl_dcu_drm_enable_vblank,
200 .disable_vblank = fsl_dcu_drm_disable_vblank,
201 .gem_free_object = drm_gem_cma_free_object,
202 .gem_vm_ops = &drm_gem_cma_vm_ops,
203 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
204 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
205 .gem_prime_import = drm_gem_prime_import,
206 .gem_prime_export = drm_gem_prime_export,
207 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
208 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
209 .gem_prime_vmap = drm_gem_cma_prime_vmap,
210 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
211 .gem_prime_mmap = drm_gem_cma_prime_mmap,
212 .dumb_create = drm_gem_cma_dumb_create,
213 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
214 .dumb_destroy = drm_gem_dumb_destroy,
215 .fops = &fsl_dcu_drm_fops,
216 .name = "fsl-dcu-drm",
217 .desc = "Freescale DCU DRM",
223 #ifdef CONFIG_PM_SLEEP
224 static int fsl_dcu_drm_pm_suspend(struct device *dev)
226 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
231 drm_kms_helper_poll_disable(fsl_dev->drm);
232 regcache_cache_only(fsl_dev->regmap, true);
233 regcache_mark_dirty(fsl_dev->regmap);
234 clk_disable(fsl_dev->clk);
235 clk_unprepare(fsl_dev->clk);
240 static int fsl_dcu_drm_pm_resume(struct device *dev)
242 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
248 ret = clk_enable(fsl_dev->clk);
250 dev_err(dev, "failed to enable dcu clk\n");
251 clk_unprepare(fsl_dev->clk);
254 ret = clk_prepare(fsl_dev->clk);
256 dev_err(dev, "failed to prepare dcu clk\n");
260 drm_kms_helper_poll_enable(fsl_dev->drm);
261 regcache_cache_only(fsl_dev->regmap, false);
262 regcache_sync(fsl_dev->regmap);
268 static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
269 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
272 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
278 static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
284 static const struct of_device_id fsl_dcu_of_match[] = {
286 .compatible = "fsl,ls1021a-dcu",
287 .data = &fsl_dcu_ls1021a_data,
289 .compatible = "fsl,vf610-dcu",
290 .data = &fsl_dcu_vf610_data,
294 MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
296 static int fsl_dcu_drm_probe(struct platform_device *pdev)
298 struct fsl_dcu_drm_device *fsl_dev;
299 struct drm_device *drm;
300 struct device *dev = &pdev->dev;
301 struct resource *res;
303 struct drm_driver *driver = &fsl_dcu_drm_driver;
304 struct clk *pix_clk_in;
305 char pix_clk_name[32];
306 const char *pix_clk_in_name;
307 const struct of_device_id *id;
310 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
314 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
317 fsl_dev->soc = id->data;
319 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
321 dev_err(dev, "could not get memory IO resource\n");
325 base = devm_ioremap_resource(dev, res);
331 fsl_dev->irq = platform_get_irq(pdev, 0);
332 if (fsl_dev->irq < 0) {
333 dev_err(dev, "failed to get irq\n");
337 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
338 &fsl_dcu_regmap_config);
339 if (IS_ERR(fsl_dev->regmap)) {
340 dev_err(dev, "regmap init failed\n");
341 return PTR_ERR(fsl_dev->regmap);
344 fsl_dev->clk = devm_clk_get(dev, "dcu");
345 if (IS_ERR(fsl_dev->clk)) {
346 dev_err(dev, "failed to get dcu clock\n");
347 return PTR_ERR(fsl_dev->clk);
349 ret = clk_prepare_enable(fsl_dev->clk);
351 dev_err(dev, "failed to enable dcu clk\n");
355 pix_clk_in = devm_clk_get(dev, "pix");
356 if (IS_ERR(pix_clk_in)) {
357 /* legancy binding, use dcu clock as pixel clock input */
358 pix_clk_in = fsl_dev->clk;
361 pix_clk_in_name = __clk_get_name(pix_clk_in);
362 snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
363 fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
364 pix_clk_in_name, 0, base + DCU_DIV_RATIO,
365 0, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
366 if (IS_ERR(fsl_dev->pix_clk)) {
367 dev_err(dev, "failed to register pix clk\n");
368 ret = PTR_ERR(fsl_dev->pix_clk);
372 ret = clk_prepare_enable(fsl_dev->pix_clk);
374 dev_err(dev, "failed to enable pix clk\n");
375 goto unregister_pix_clk;
378 fsl_dev->tcon = fsl_tcon_init(dev);
380 drm = drm_dev_alloc(driver, dev);
383 goto disable_pix_clk;
388 fsl_dev->np = dev->of_node;
389 drm->dev_private = fsl_dev;
390 dev_set_drvdata(dev, fsl_dev);
392 ret = drm_dev_register(drm, 0);
396 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
397 driver->major, driver->minor, driver->patchlevel,
398 driver->date, drm->primary->index);
405 clk_disable_unprepare(fsl_dev->pix_clk);
407 clk_unregister(fsl_dev->pix_clk);
409 clk_disable_unprepare(fsl_dev->clk);
413 static int fsl_dcu_drm_remove(struct platform_device *pdev)
415 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
417 clk_disable_unprepare(fsl_dev->clk);
418 clk_disable_unprepare(fsl_dev->pix_clk);
419 clk_unregister(fsl_dev->pix_clk);
420 drm_put_dev(fsl_dev->drm);
425 static struct platform_driver fsl_dcu_drm_platform_driver = {
426 .probe = fsl_dcu_drm_probe,
427 .remove = fsl_dcu_drm_remove,
430 .pm = &fsl_dcu_drm_pm_ops,
431 .of_match_table = fsl_dcu_of_match,
435 module_platform_driver(fsl_dcu_drm_platform_driver);
437 MODULE_DESCRIPTION("Freescale DCU DRM Driver");
438 MODULE_LICENSE("GPL");