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>
14 #include <linux/console.h>
16 #include <linux/mfd/syscon.h>
18 #include <linux/module.h>
19 #include <linux/of_platform.h>
20 #include <linux/platform_device.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/regmap.h>
26 #include <drm/drm_atomic_helper.h>
27 #include <drm/drm_crtc_helper.h>
28 #include <drm/drm_fb_cma_helper.h>
29 #include <drm/drm_gem_cma_helper.h>
31 #include "fsl_dcu_drm_crtc.h"
32 #include "fsl_dcu_drm_drv.h"
35 static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
37 if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
43 static const struct regmap_config fsl_dcu_regmap_config = {
48 .volatile_reg = fsl_dcu_drm_is_volatile_reg,
51 static int fsl_dcu_drm_irq_init(struct drm_device *dev)
53 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
56 ret = drm_irq_install(dev, fsl_dev->irq);
58 dev_err(dev->dev, "failed to install IRQ handler\n");
60 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
61 regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
66 static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
68 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
71 ret = fsl_dcu_drm_modeset_init(fsl_dev);
73 dev_err(dev->dev, "failed to initialize mode setting\n");
77 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
79 dev_err(dev->dev, "failed to initialize vblank\n");
83 ret = fsl_dcu_drm_irq_init(dev);
86 dev->irq_enabled = true;
88 fsl_dcu_fbdev_init(dev);
92 drm_kms_helper_poll_fini(dev);
95 drm_fbdev_cma_fini(fsl_dev->fbdev);
97 drm_mode_config_cleanup(dev);
98 drm_vblank_cleanup(dev);
99 drm_irq_uninstall(dev);
100 dev->dev_private = NULL;
105 static int fsl_dcu_unload(struct drm_device *dev)
107 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
109 drm_kms_helper_poll_fini(dev);
112 drm_fbdev_cma_fini(fsl_dev->fbdev);
114 drm_mode_config_cleanup(dev);
115 drm_vblank_cleanup(dev);
116 drm_irq_uninstall(dev);
118 dev->dev_private = NULL;
123 static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
125 struct drm_device *dev = arg;
126 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
127 unsigned int int_status;
130 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
132 dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
136 if (int_status & DCU_INT_STATUS_VBLANK)
137 drm_handle_vblank(dev, 0);
139 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
144 static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
146 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
149 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
150 value &= ~DCU_INT_MASK_VBLANK;
151 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
156 static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
159 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
162 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
163 value |= DCU_INT_MASK_VBLANK;
164 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
167 static void fsl_dcu_drm_lastclose(struct drm_device *dev)
169 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
171 drm_fbdev_cma_restore_mode(fsl_dev->fbdev);
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 .lastclose = fsl_dcu_drm_lastclose,
192 .load = fsl_dcu_load,
193 .unload = fsl_dcu_unload,
194 .irq_handler = fsl_dcu_drm_irq,
195 .get_vblank_counter = drm_vblank_no_hw_counter,
196 .enable_vblank = fsl_dcu_drm_enable_vblank,
197 .disable_vblank = fsl_dcu_drm_disable_vblank,
198 .gem_free_object_unlocked = 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 disable_irq(fsl_dev->irq);
229 drm_kms_helper_poll_disable(fsl_dev->drm);
232 drm_fbdev_cma_set_suspend(fsl_dev->fbdev, 1);
235 fsl_dev->state = drm_atomic_helper_suspend(fsl_dev->drm);
236 if (IS_ERR(fsl_dev->state)) {
238 drm_fbdev_cma_set_suspend(fsl_dev->fbdev, 0);
241 drm_kms_helper_poll_enable(fsl_dev->drm);
242 enable_irq(fsl_dev->irq);
243 return PTR_ERR(fsl_dev->state);
246 clk_disable_unprepare(fsl_dev->clk);
251 static int fsl_dcu_drm_pm_resume(struct device *dev)
253 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
259 ret = clk_prepare_enable(fsl_dev->clk);
261 dev_err(dev, "failed to enable dcu clk\n");
266 fsl_tcon_bypass_enable(fsl_dev->tcon);
267 fsl_dcu_drm_init_planes(fsl_dev->drm);
268 enable_irq(fsl_dev->irq);
269 drm_atomic_helper_resume(fsl_dev->drm, fsl_dev->state);
272 drm_fbdev_cma_set_suspend(fsl_dev->fbdev, 0);
275 drm_kms_helper_poll_enable(fsl_dev->drm);
281 static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
282 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
285 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
289 .layer_regs = LS1021A_LAYER_REG_NUM,
292 static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
296 .layer_regs = VF610_LAYER_REG_NUM,
299 static const struct of_device_id fsl_dcu_of_match[] = {
301 .compatible = "fsl,ls1021a-dcu",
302 .data = &fsl_dcu_ls1021a_data,
304 .compatible = "fsl,vf610-dcu",
305 .data = &fsl_dcu_vf610_data,
309 MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
311 static int fsl_dcu_drm_probe(struct platform_device *pdev)
313 struct fsl_dcu_drm_device *fsl_dev;
314 struct drm_device *drm;
315 struct device *dev = &pdev->dev;
316 struct resource *res;
318 struct drm_driver *driver = &fsl_dcu_drm_driver;
319 struct clk *pix_clk_in;
320 char pix_clk_name[32];
321 const char *pix_clk_in_name;
322 const struct of_device_id *id;
324 u8 div_ratio_shift = 0;
326 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
330 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
333 fsl_dev->soc = id->data;
335 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
337 dev_err(dev, "could not get memory IO resource\n");
341 base = devm_ioremap_resource(dev, res);
347 fsl_dev->irq = platform_get_irq(pdev, 0);
348 if (fsl_dev->irq < 0) {
349 dev_err(dev, "failed to get irq\n");
353 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
354 &fsl_dcu_regmap_config);
355 if (IS_ERR(fsl_dev->regmap)) {
356 dev_err(dev, "regmap init failed\n");
357 return PTR_ERR(fsl_dev->regmap);
360 fsl_dev->clk = devm_clk_get(dev, "dcu");
361 if (IS_ERR(fsl_dev->clk)) {
362 dev_err(dev, "failed to get dcu clock\n");
363 return PTR_ERR(fsl_dev->clk);
365 ret = clk_prepare_enable(fsl_dev->clk);
367 dev_err(dev, "failed to enable dcu clk\n");
371 pix_clk_in = devm_clk_get(dev, "pix");
372 if (IS_ERR(pix_clk_in)) {
373 /* legancy binding, use dcu clock as pixel clock input */
374 pix_clk_in = fsl_dev->clk;
377 if (of_property_read_bool(dev->of_node, "big-endian"))
378 div_ratio_shift = 24;
380 pix_clk_in_name = __clk_get_name(pix_clk_in);
381 snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
382 fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
383 pix_clk_in_name, 0, base + DCU_DIV_RATIO,
384 div_ratio_shift, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
385 if (IS_ERR(fsl_dev->pix_clk)) {
386 dev_err(dev, "failed to register pix clk\n");
387 ret = PTR_ERR(fsl_dev->pix_clk);
391 fsl_dev->tcon = fsl_tcon_init(dev);
393 drm = drm_dev_alloc(driver, dev);
396 goto unregister_pix_clk;
401 fsl_dev->np = dev->of_node;
402 drm->dev_private = fsl_dev;
403 dev_set_drvdata(dev, fsl_dev);
405 ret = drm_dev_register(drm, 0);
409 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
410 driver->major, driver->minor, driver->patchlevel,
411 driver->date, drm->primary->index);
418 clk_unregister(fsl_dev->pix_clk);
420 clk_disable_unprepare(fsl_dev->clk);
424 static int fsl_dcu_drm_remove(struct platform_device *pdev)
426 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
428 clk_disable_unprepare(fsl_dev->clk);
429 clk_unregister(fsl_dev->pix_clk);
430 drm_put_dev(fsl_dev->drm);
435 static struct platform_driver fsl_dcu_drm_platform_driver = {
436 .probe = fsl_dcu_drm_probe,
437 .remove = fsl_dcu_drm_remove,
440 .pm = &fsl_dcu_drm_pm_ops,
441 .of_match_table = fsl_dcu_of_match,
445 module_platform_driver(fsl_dcu_drm_platform_driver);
447 MODULE_DESCRIPTION("Freescale DCU DRM Driver");
448 MODULE_LICENSE("GPL");