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);
62 regmap_write(fsl_dev
->regmap
, DCU_UPDATE_MODE
,
63 DCU_UPDATE_MODE_READREG
);
68 static int fsl_dcu_load(struct drm_device
*dev
, unsigned long flags
)
70 struct fsl_dcu_drm_device
*fsl_dev
= dev
->dev_private
;
73 ret
= fsl_dcu_drm_modeset_init(fsl_dev
);
75 dev_err(dev
->dev
, "failed to initialize mode setting\n");
79 ret
= drm_vblank_init(dev
, dev
->mode_config
.num_crtc
);
81 dev_err(dev
->dev
, "failed to initialize vblank\n");
85 ret
= fsl_dcu_drm_irq_init(dev
);
88 dev
->irq_enabled
= true;
90 fsl_dcu_fbdev_init(dev
);
94 drm_kms_helper_poll_fini(dev
);
97 drm_fbdev_cma_fini(fsl_dev
->fbdev
);
99 drm_mode_config_cleanup(dev
);
100 drm_vblank_cleanup(dev
);
101 drm_irq_uninstall(dev
);
102 dev
->dev_private
= NULL
;
107 static int fsl_dcu_unload(struct drm_device
*dev
)
109 struct fsl_dcu_drm_device
*fsl_dev
= dev
->dev_private
;
111 drm_kms_helper_poll_fini(dev
);
114 drm_fbdev_cma_fini(fsl_dev
->fbdev
);
116 drm_mode_config_cleanup(dev
);
117 drm_vblank_cleanup(dev
);
118 drm_irq_uninstall(dev
);
120 dev
->dev_private
= NULL
;
125 static irqreturn_t
fsl_dcu_drm_irq(int irq
, void *arg
)
127 struct drm_device
*dev
= arg
;
128 struct fsl_dcu_drm_device
*fsl_dev
= dev
->dev_private
;
129 unsigned int int_status
;
132 ret
= regmap_read(fsl_dev
->regmap
, DCU_INT_STATUS
, &int_status
);
134 dev_err(dev
->dev
, "read DCU_INT_STATUS failed\n");
138 if (int_status
& DCU_INT_STATUS_VBLANK
)
139 drm_handle_vblank(dev
, 0);
141 regmap_write(fsl_dev
->regmap
, DCU_INT_STATUS
, int_status
);
142 regmap_write(fsl_dev
->regmap
, DCU_UPDATE_MODE
,
143 DCU_UPDATE_MODE_READREG
);
148 static int fsl_dcu_drm_enable_vblank(struct drm_device
*dev
, unsigned int pipe
)
150 struct fsl_dcu_drm_device
*fsl_dev
= dev
->dev_private
;
153 regmap_read(fsl_dev
->regmap
, DCU_INT_MASK
, &value
);
154 value
&= ~DCU_INT_MASK_VBLANK
;
155 regmap_write(fsl_dev
->regmap
, DCU_INT_MASK
, value
);
160 static void fsl_dcu_drm_disable_vblank(struct drm_device
*dev
,
163 struct fsl_dcu_drm_device
*fsl_dev
= dev
->dev_private
;
166 regmap_read(fsl_dev
->regmap
, DCU_INT_MASK
, &value
);
167 value
|= DCU_INT_MASK_VBLANK
;
168 regmap_write(fsl_dev
->regmap
, DCU_INT_MASK
, value
);
171 static void fsl_dcu_drm_lastclose(struct drm_device
*dev
)
173 struct fsl_dcu_drm_device
*fsl_dev
= dev
->dev_private
;
175 drm_fbdev_cma_restore_mode(fsl_dev
->fbdev
);
178 static const struct file_operations fsl_dcu_drm_fops
= {
179 .owner
= THIS_MODULE
,
181 .release
= drm_release
,
182 .unlocked_ioctl
= drm_ioctl
,
184 .compat_ioctl
= drm_compat_ioctl
,
189 .mmap
= drm_gem_cma_mmap
,
192 static struct drm_driver fsl_dcu_drm_driver
= {
193 .driver_features
= DRIVER_HAVE_IRQ
| DRIVER_GEM
| DRIVER_MODESET
194 | DRIVER_PRIME
| DRIVER_ATOMIC
,
195 .lastclose
= fsl_dcu_drm_lastclose
,
196 .load
= fsl_dcu_load
,
197 .unload
= fsl_dcu_unload
,
198 .irq_handler
= fsl_dcu_drm_irq
,
199 .get_vblank_counter
= drm_vblank_no_hw_counter
,
200 .enable_vblank
= fsl_dcu_drm_enable_vblank
,
201 .disable_vblank
= fsl_dcu_drm_disable_vblank
,
202 .gem_free_object_unlocked
= drm_gem_cma_free_object
,
203 .gem_vm_ops
= &drm_gem_cma_vm_ops
,
204 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
205 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
206 .gem_prime_import
= drm_gem_prime_import
,
207 .gem_prime_export
= drm_gem_prime_export
,
208 .gem_prime_get_sg_table
= drm_gem_cma_prime_get_sg_table
,
209 .gem_prime_import_sg_table
= drm_gem_cma_prime_import_sg_table
,
210 .gem_prime_vmap
= drm_gem_cma_prime_vmap
,
211 .gem_prime_vunmap
= drm_gem_cma_prime_vunmap
,
212 .gem_prime_mmap
= drm_gem_cma_prime_mmap
,
213 .dumb_create
= drm_gem_cma_dumb_create
,
214 .dumb_map_offset
= drm_gem_cma_dumb_map_offset
,
215 .dumb_destroy
= drm_gem_dumb_destroy
,
216 .fops
= &fsl_dcu_drm_fops
,
217 .name
= "fsl-dcu-drm",
218 .desc
= "Freescale DCU DRM",
224 #ifdef CONFIG_PM_SLEEP
225 static int fsl_dcu_drm_pm_suspend(struct device
*dev
)
227 struct fsl_dcu_drm_device
*fsl_dev
= dev_get_drvdata(dev
);
232 disable_irq(fsl_dev
->irq
);
233 drm_kms_helper_poll_disable(fsl_dev
->drm
);
236 drm_fbdev_cma_set_suspend(fsl_dev
->fbdev
, 1);
239 fsl_dev
->state
= drm_atomic_helper_suspend(fsl_dev
->drm
);
240 if (IS_ERR(fsl_dev
->state
)) {
242 drm_fbdev_cma_set_suspend(fsl_dev
->fbdev
, 0);
245 drm_kms_helper_poll_enable(fsl_dev
->drm
);
246 enable_irq(fsl_dev
->irq
);
247 return PTR_ERR(fsl_dev
->state
);
250 clk_disable_unprepare(fsl_dev
->pix_clk
);
251 clk_disable_unprepare(fsl_dev
->clk
);
256 static int fsl_dcu_drm_pm_resume(struct device
*dev
)
258 struct fsl_dcu_drm_device
*fsl_dev
= dev_get_drvdata(dev
);
264 ret
= clk_prepare_enable(fsl_dev
->clk
);
266 dev_err(dev
, "failed to enable dcu clk\n");
270 ret
= clk_prepare_enable(fsl_dev
->pix_clk
);
272 dev_err(dev
, "failed to enable pix clk\n");
276 fsl_dcu_drm_init_planes(fsl_dev
->drm
);
277 drm_atomic_helper_resume(fsl_dev
->drm
, fsl_dev
->state
);
280 drm_fbdev_cma_set_suspend(fsl_dev
->fbdev
, 0);
283 drm_kms_helper_poll_enable(fsl_dev
->drm
);
284 enable_irq(fsl_dev
->irq
);
290 static const struct dev_pm_ops fsl_dcu_drm_pm_ops
= {
291 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend
, fsl_dcu_drm_pm_resume
)
294 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data
= {
298 .layer_regs
= LS1021A_LAYER_REG_NUM
,
301 static const struct fsl_dcu_soc_data fsl_dcu_vf610_data
= {
305 .layer_regs
= VF610_LAYER_REG_NUM
,
308 static const struct of_device_id fsl_dcu_of_match
[] = {
310 .compatible
= "fsl,ls1021a-dcu",
311 .data
= &fsl_dcu_ls1021a_data
,
313 .compatible
= "fsl,vf610-dcu",
314 .data
= &fsl_dcu_vf610_data
,
318 MODULE_DEVICE_TABLE(of
, fsl_dcu_of_match
);
320 static int fsl_dcu_drm_probe(struct platform_device
*pdev
)
322 struct fsl_dcu_drm_device
*fsl_dev
;
323 struct drm_device
*drm
;
324 struct device
*dev
= &pdev
->dev
;
325 struct resource
*res
;
327 struct drm_driver
*driver
= &fsl_dcu_drm_driver
;
328 struct clk
*pix_clk_in
;
329 char pix_clk_name
[32];
330 const char *pix_clk_in_name
;
331 const struct of_device_id
*id
;
334 fsl_dev
= devm_kzalloc(dev
, sizeof(*fsl_dev
), GFP_KERNEL
);
338 id
= of_match_node(fsl_dcu_of_match
, pdev
->dev
.of_node
);
341 fsl_dev
->soc
= id
->data
;
343 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
345 dev_err(dev
, "could not get memory IO resource\n");
349 base
= devm_ioremap_resource(dev
, res
);
355 fsl_dev
->irq
= platform_get_irq(pdev
, 0);
356 if (fsl_dev
->irq
< 0) {
357 dev_err(dev
, "failed to get irq\n");
361 fsl_dev
->regmap
= devm_regmap_init_mmio(dev
, base
,
362 &fsl_dcu_regmap_config
);
363 if (IS_ERR(fsl_dev
->regmap
)) {
364 dev_err(dev
, "regmap init failed\n");
365 return PTR_ERR(fsl_dev
->regmap
);
368 fsl_dev
->clk
= devm_clk_get(dev
, "dcu");
369 if (IS_ERR(fsl_dev
->clk
)) {
370 dev_err(dev
, "failed to get dcu clock\n");
371 return PTR_ERR(fsl_dev
->clk
);
373 ret
= clk_prepare_enable(fsl_dev
->clk
);
375 dev_err(dev
, "failed to enable dcu clk\n");
379 pix_clk_in
= devm_clk_get(dev
, "pix");
380 if (IS_ERR(pix_clk_in
)) {
381 /* legancy binding, use dcu clock as pixel clock input */
382 pix_clk_in
= fsl_dev
->clk
;
385 pix_clk_in_name
= __clk_get_name(pix_clk_in
);
386 snprintf(pix_clk_name
, sizeof(pix_clk_name
), "%s_pix", pix_clk_in_name
);
387 fsl_dev
->pix_clk
= clk_register_divider(dev
, pix_clk_name
,
388 pix_clk_in_name
, 0, base
+ DCU_DIV_RATIO
,
389 0, 8, CLK_DIVIDER_ROUND_CLOSEST
, NULL
);
390 if (IS_ERR(fsl_dev
->pix_clk
)) {
391 dev_err(dev
, "failed to register pix clk\n");
392 ret
= PTR_ERR(fsl_dev
->pix_clk
);
396 ret
= clk_prepare_enable(fsl_dev
->pix_clk
);
398 dev_err(dev
, "failed to enable pix clk\n");
399 goto unregister_pix_clk
;
402 fsl_dev
->tcon
= fsl_tcon_init(dev
);
404 drm
= drm_dev_alloc(driver
, dev
);
407 goto disable_pix_clk
;
412 fsl_dev
->np
= dev
->of_node
;
413 drm
->dev_private
= fsl_dev
;
414 dev_set_drvdata(dev
, fsl_dev
);
416 ret
= drm_dev_register(drm
, 0);
420 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver
->name
,
421 driver
->major
, driver
->minor
, driver
->patchlevel
,
422 driver
->date
, drm
->primary
->index
);
429 clk_disable_unprepare(fsl_dev
->pix_clk
);
431 clk_unregister(fsl_dev
->pix_clk
);
433 clk_disable_unprepare(fsl_dev
->clk
);
437 static int fsl_dcu_drm_remove(struct platform_device
*pdev
)
439 struct fsl_dcu_drm_device
*fsl_dev
= platform_get_drvdata(pdev
);
441 clk_disable_unprepare(fsl_dev
->clk
);
442 clk_disable_unprepare(fsl_dev
->pix_clk
);
443 clk_unregister(fsl_dev
->pix_clk
);
444 drm_put_dev(fsl_dev
->drm
);
449 static struct platform_driver fsl_dcu_drm_platform_driver
= {
450 .probe
= fsl_dcu_drm_probe
,
451 .remove
= fsl_dcu_drm_remove
,
454 .pm
= &fsl_dcu_drm_pm_ops
,
455 .of_match_table
= fsl_dcu_of_match
,
459 module_platform_driver(fsl_dcu_drm_platform_driver
);
461 MODULE_DESCRIPTION("Freescale DCU DRM Driver");
462 MODULE_LICENSE("GPL");