2 * rcar_du_drv.c -- R-Car Display Unit DRM driver
4 * Copyright (C) 2013-2014 Renesas Electronics Corporation
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #include <linux/clk.h>
17 #include <linux/module.h>
18 #include <linux/of_device.h>
19 #include <linux/platform_device.h>
21 #include <linux/slab.h>
22 #include <linux/wait.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 "rcar_du_crtc.h"
30 #include "rcar_du_drv.h"
31 #include "rcar_du_kms.h"
32 #include "rcar_du_regs.h"
34 /* -----------------------------------------------------------------------------
38 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
42 /* R8A7779 has two RGB outputs and one (currently unsupported)
45 [RCAR_DU_OUTPUT_DPAD0] = {
46 .possible_crtcs = BIT(0),
47 .encoder_type = DRM_MODE_ENCODER_NONE,
50 [RCAR_DU_OUTPUT_DPAD1] = {
51 .possible_crtcs = BIT(1) | BIT(0),
52 .encoder_type = DRM_MODE_ENCODER_NONE,
59 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
60 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
61 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
62 .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
65 /* R8A7790 has one RGB output, two LVDS outputs and one
66 * (currently unsupported) TCON output.
68 [RCAR_DU_OUTPUT_DPAD0] = {
69 .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
70 .encoder_type = DRM_MODE_ENCODER_NONE,
73 [RCAR_DU_OUTPUT_LVDS0] = {
74 .possible_crtcs = BIT(0),
75 .encoder_type = DRM_MODE_ENCODER_LVDS,
78 [RCAR_DU_OUTPUT_LVDS1] = {
79 .possible_crtcs = BIT(2) | BIT(1),
80 .encoder_type = DRM_MODE_ENCODER_LVDS,
87 /* M2-W (r8a7791) and M2-N (r8a7793) are identical */
88 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
89 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
90 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
93 /* R8A779[13] has one RGB output, one LVDS output and one
94 * (currently unsupported) TCON output.
96 [RCAR_DU_OUTPUT_DPAD0] = {
97 .possible_crtcs = BIT(1) | BIT(0),
98 .encoder_type = DRM_MODE_ENCODER_NONE,
101 [RCAR_DU_OUTPUT_LVDS0] = {
102 .possible_crtcs = BIT(0),
103 .encoder_type = DRM_MODE_ENCODER_LVDS,
110 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
111 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
112 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
115 /* R8A7794 has two RGB outputs and one (currently unsupported)
118 [RCAR_DU_OUTPUT_DPAD0] = {
119 .possible_crtcs = BIT(0),
120 .encoder_type = DRM_MODE_ENCODER_NONE,
123 [RCAR_DU_OUTPUT_DPAD1] = {
124 .possible_crtcs = BIT(1),
125 .encoder_type = DRM_MODE_ENCODER_NONE,
132 static const struct of_device_id rcar_du_of_table[] = {
133 { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
134 { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
135 { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
136 { .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
137 { .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
141 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
143 /* -----------------------------------------------------------------------------
147 static int rcar_du_unload(struct drm_device *dev)
149 struct rcar_du_device *rcdu = dev->dev_private;
152 drm_fbdev_cma_fini(rcdu->fbdev);
154 drm_kms_helper_poll_fini(dev);
155 drm_mode_config_cleanup(dev);
156 drm_vblank_cleanup(dev);
158 dev->irq_enabled = 0;
159 dev->dev_private = NULL;
164 static int rcar_du_load(struct drm_device *dev, unsigned long flags)
166 struct platform_device *pdev = dev->platformdev;
167 struct device_node *np = pdev->dev.of_node;
168 struct rcar_du_device *rcdu;
169 struct resource *mem;
173 dev_err(dev->dev, "no platform data\n");
177 rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
179 dev_err(dev->dev, "failed to allocate private data\n");
183 init_waitqueue_head(&rcdu->commit.wait);
185 rcdu->dev = &pdev->dev;
186 rcdu->info = of_match_device(rcar_du_of_table, rcdu->dev)->data;
188 dev->dev_private = rcdu;
191 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
192 rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
193 if (IS_ERR(rcdu->mmio))
194 return PTR_ERR(rcdu->mmio);
196 /* Initialize vertical blanking interrupts handling. Start with vblank
197 * disabled for all CRTCs.
199 ret = drm_vblank_init(dev, (1 << rcdu->info->num_crtcs) - 1);
201 dev_err(&pdev->dev, "failed to initialize vblank\n");
205 /* DRM/KMS objects */
206 ret = rcar_du_modeset_init(rcdu);
208 dev_err(&pdev->dev, "failed to initialize DRM/KMS (%d)\n", ret);
212 dev->irq_enabled = 1;
214 platform_set_drvdata(pdev, rcdu);
223 static void rcar_du_lastclose(struct drm_device *dev)
225 struct rcar_du_device *rcdu = dev->dev_private;
227 drm_fbdev_cma_restore_mode(rcdu->fbdev);
230 static int rcar_du_enable_vblank(struct drm_device *dev, unsigned int pipe)
232 struct rcar_du_device *rcdu = dev->dev_private;
234 rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], true);
239 static void rcar_du_disable_vblank(struct drm_device *dev, unsigned int pipe)
241 struct rcar_du_device *rcdu = dev->dev_private;
243 rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], false);
246 static const struct file_operations rcar_du_fops = {
247 .owner = THIS_MODULE,
249 .release = drm_release,
250 .unlocked_ioctl = drm_ioctl,
252 .compat_ioctl = drm_compat_ioctl,
257 .mmap = drm_gem_cma_mmap,
260 static struct drm_driver rcar_du_driver = {
261 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
263 .load = rcar_du_load,
264 .unload = rcar_du_unload,
265 .lastclose = rcar_du_lastclose,
266 .set_busid = drm_platform_set_busid,
267 .get_vblank_counter = drm_vblank_no_hw_counter,
268 .enable_vblank = rcar_du_enable_vblank,
269 .disable_vblank = rcar_du_disable_vblank,
270 .gem_free_object = drm_gem_cma_free_object,
271 .gem_vm_ops = &drm_gem_cma_vm_ops,
272 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
273 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
274 .gem_prime_import = drm_gem_prime_import,
275 .gem_prime_export = drm_gem_prime_export,
276 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
277 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
278 .gem_prime_vmap = drm_gem_cma_prime_vmap,
279 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
280 .gem_prime_mmap = drm_gem_cma_prime_mmap,
281 .dumb_create = rcar_du_dumb_create,
282 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
283 .dumb_destroy = drm_gem_dumb_destroy,
284 .fops = &rcar_du_fops,
286 .desc = "Renesas R-Car Display Unit",
292 /* -----------------------------------------------------------------------------
296 #ifdef CONFIG_PM_SLEEP
297 static int rcar_du_pm_suspend(struct device *dev)
299 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
301 drm_kms_helper_poll_disable(rcdu->ddev);
302 /* TODO Suspend the CRTC */
307 static int rcar_du_pm_resume(struct device *dev)
309 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
311 /* TODO Resume the CRTC */
313 drm_kms_helper_poll_enable(rcdu->ddev);
318 static const struct dev_pm_ops rcar_du_pm_ops = {
319 SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
322 /* -----------------------------------------------------------------------------
326 static int rcar_du_probe(struct platform_device *pdev)
328 return drm_platform_init(&rcar_du_driver, pdev);
331 static int rcar_du_remove(struct platform_device *pdev)
333 struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
335 drm_put_dev(rcdu->ddev);
340 static struct platform_driver rcar_du_platform_driver = {
341 .probe = rcar_du_probe,
342 .remove = rcar_du_remove,
345 .pm = &rcar_du_pm_ops,
346 .of_match_table = rcar_du_of_table,
350 module_platform_driver(rcar_du_platform_driver);
352 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
353 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
354 MODULE_LICENSE("GPL");