2 * rcar_du_drv.c -- R-Car Display Unit DRM driver
4 * Copyright (C) 2013-2015 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 = {
43 /* R8A7779 has two RGB outputs and one (currently unsupported)
46 [RCAR_DU_OUTPUT_DPAD0] = {
47 .possible_crtcs = BIT(0),
48 .encoder_type = DRM_MODE_ENCODER_NONE,
51 [RCAR_DU_OUTPUT_DPAD1] = {
52 .possible_crtcs = BIT(1) | BIT(0),
53 .encoder_type = DRM_MODE_ENCODER_NONE,
60 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
62 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
63 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
64 .quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
67 /* R8A7790 has one RGB output, two LVDS outputs and one
68 * (currently unsupported) TCON output.
70 [RCAR_DU_OUTPUT_DPAD0] = {
71 .possible_crtcs = BIT(2) | BIT(1) | BIT(0),
72 .encoder_type = DRM_MODE_ENCODER_NONE,
75 [RCAR_DU_OUTPUT_LVDS0] = {
76 .possible_crtcs = BIT(0),
77 .encoder_type = DRM_MODE_ENCODER_LVDS,
80 [RCAR_DU_OUTPUT_LVDS1] = {
81 .possible_crtcs = BIT(2) | BIT(1),
82 .encoder_type = DRM_MODE_ENCODER_LVDS,
89 /* M2-W (r8a7791) and M2-N (r8a7793) are identical */
90 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
92 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
93 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
96 /* R8A779[13] has one RGB output, one LVDS output and one
97 * (currently unsupported) TCON output.
99 [RCAR_DU_OUTPUT_DPAD0] = {
100 .possible_crtcs = BIT(1) | BIT(0),
101 .encoder_type = DRM_MODE_ENCODER_NONE,
104 [RCAR_DU_OUTPUT_LVDS0] = {
105 .possible_crtcs = BIT(0),
106 .encoder_type = DRM_MODE_ENCODER_LVDS,
113 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
115 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
116 | RCAR_DU_FEATURE_EXT_CTRL_REGS,
119 /* R8A7794 has two RGB outputs and one (currently unsupported)
122 [RCAR_DU_OUTPUT_DPAD0] = {
123 .possible_crtcs = BIT(0),
124 .encoder_type = DRM_MODE_ENCODER_NONE,
127 [RCAR_DU_OUTPUT_DPAD1] = {
128 .possible_crtcs = BIT(1),
129 .encoder_type = DRM_MODE_ENCODER_NONE,
136 static const struct rcar_du_device_info rcar_du_r8a7795_info = {
138 .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
139 | RCAR_DU_FEATURE_EXT_CTRL_REGS
140 | RCAR_DU_FEATURE_VSP1_SOURCE,
143 /* R8A7795 has one RGB output, one LVDS output and two
144 * (currently unsupported) HDMI outputs.
146 [RCAR_DU_OUTPUT_DPAD0] = {
147 .possible_crtcs = BIT(3),
148 .encoder_type = DRM_MODE_ENCODER_NONE,
151 [RCAR_DU_OUTPUT_LVDS0] = {
152 .possible_crtcs = BIT(0),
153 .encoder_type = DRM_MODE_ENCODER_LVDS,
160 static const struct of_device_id rcar_du_of_table[] = {
161 { .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
162 { .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
163 { .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
164 { .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
165 { .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
166 { .compatible = "renesas,du-r8a7795", .data = &rcar_du_r8a7795_info },
170 MODULE_DEVICE_TABLE(of, rcar_du_of_table);
172 /* -----------------------------------------------------------------------------
176 static void rcar_du_lastclose(struct drm_device *dev)
178 struct rcar_du_device *rcdu = dev->dev_private;
180 drm_fbdev_cma_restore_mode(rcdu->fbdev);
183 static int rcar_du_enable_vblank(struct drm_device *dev, unsigned int pipe)
185 struct rcar_du_device *rcdu = dev->dev_private;
187 rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], true);
192 static void rcar_du_disable_vblank(struct drm_device *dev, unsigned int pipe)
194 struct rcar_du_device *rcdu = dev->dev_private;
196 rcar_du_crtc_enable_vblank(&rcdu->crtcs[pipe], false);
199 static const struct file_operations rcar_du_fops = {
200 .owner = THIS_MODULE,
202 .release = drm_release,
203 .unlocked_ioctl = drm_ioctl,
205 .compat_ioctl = drm_compat_ioctl,
210 .mmap = drm_gem_cma_mmap,
213 static struct drm_driver rcar_du_driver = {
214 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
216 .lastclose = rcar_du_lastclose,
217 .get_vblank_counter = drm_vblank_no_hw_counter,
218 .enable_vblank = rcar_du_enable_vblank,
219 .disable_vblank = rcar_du_disable_vblank,
220 .gem_free_object_unlocked = drm_gem_cma_free_object,
221 .gem_vm_ops = &drm_gem_cma_vm_ops,
222 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
223 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
224 .gem_prime_import = drm_gem_prime_import,
225 .gem_prime_export = drm_gem_prime_export,
226 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
227 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
228 .gem_prime_vmap = drm_gem_cma_prime_vmap,
229 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
230 .gem_prime_mmap = drm_gem_cma_prime_mmap,
231 .dumb_create = rcar_du_dumb_create,
232 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
233 .dumb_destroy = drm_gem_dumb_destroy,
234 .fops = &rcar_du_fops,
236 .desc = "Renesas R-Car Display Unit",
242 /* -----------------------------------------------------------------------------
246 #ifdef CONFIG_PM_SLEEP
247 static int rcar_du_pm_suspend(struct device *dev)
249 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
251 drm_kms_helper_poll_disable(rcdu->ddev);
252 /* TODO Suspend the CRTC */
257 static int rcar_du_pm_resume(struct device *dev)
259 struct rcar_du_device *rcdu = dev_get_drvdata(dev);
261 /* TODO Resume the CRTC */
263 drm_kms_helper_poll_enable(rcdu->ddev);
268 static const struct dev_pm_ops rcar_du_pm_ops = {
269 SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
272 /* -----------------------------------------------------------------------------
276 static int rcar_du_remove(struct platform_device *pdev)
278 struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
279 struct drm_device *ddev = rcdu->ddev;
281 drm_dev_unregister(ddev);
284 drm_fbdev_cma_fini(rcdu->fbdev);
286 drm_kms_helper_poll_fini(ddev);
287 drm_mode_config_cleanup(ddev);
294 static int rcar_du_probe(struct platform_device *pdev)
296 struct device_node *np = pdev->dev.of_node;
297 struct rcar_du_device *rcdu;
298 struct drm_device *ddev;
299 struct resource *mem;
303 dev_err(&pdev->dev, "no device tree node\n");
307 /* Allocate and initialize the R-Car device structure. */
308 rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
312 init_waitqueue_head(&rcdu->commit.wait);
314 rcdu->dev = &pdev->dev;
315 rcdu->info = of_match_device(rcar_du_of_table, rcdu->dev)->data;
317 platform_set_drvdata(pdev, rcdu);
320 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
321 rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
322 if (IS_ERR(rcdu->mmio))
323 return PTR_ERR(rcdu->mmio);
325 /* DRM/KMS objects */
326 ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
328 return PTR_ERR(ddev);
331 ddev->dev_private = rcdu;
333 ret = rcar_du_modeset_init(rcdu);
335 if (ret != -EPROBE_DEFER)
337 "failed to initialize DRM/KMS (%d)\n", ret);
341 ddev->irq_enabled = 1;
343 /* Register the DRM device with the core and the connectors with
346 ret = drm_dev_register(ddev, 0);
350 DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
355 rcar_du_remove(pdev);
360 static struct platform_driver rcar_du_platform_driver = {
361 .probe = rcar_du_probe,
362 .remove = rcar_du_remove,
365 .pm = &rcar_du_pm_ops,
366 .of_match_table = rcar_du_of_table,
370 module_platform_driver(rcar_du_platform_driver);
372 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
373 MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
374 MODULE_LICENSE("GPL");