2 * shmob_drm_drv.c -- SH Mobile DRM driver
4 * Copyright (C) 2012 Renesas Corporation
6 * 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/platform_device.h>
20 #include <linux/slab.h>
23 #include <drm/drm_crtc_helper.h>
24 #include <drm/drm_gem_cma_helper.h>
26 #include "shmob_drm_crtc.h"
27 #include "shmob_drm_drv.h"
28 #include "shmob_drm_kms.h"
29 #include "shmob_drm_plane.h"
30 #include "shmob_drm_regs.h"
32 /* -----------------------------------------------------------------------------
33 * Hardware initialization
36 static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
38 static const u32 ldmt1r[] = {
39 [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
40 [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
41 [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
42 [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
43 [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
44 [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
45 [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
46 [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
47 [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A,
48 [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B,
49 [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C,
50 [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D,
51 [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9,
52 [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12,
53 [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A,
54 [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B,
55 [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C,
56 [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18,
57 [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24,
60 if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
61 dev_err(sdev->dev, "invalid interface type %u\n",
62 sdev->pdata->iface.interface);
66 sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
70 static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev,
71 enum shmob_drm_clk_source clksrc)
77 case SHMOB_DRM_CLK_BUS:
79 sdev->lddckr = LDDCKR_ICKSEL_BUS;
81 case SHMOB_DRM_CLK_PERIPHERAL:
82 clkname = "peripheral_clk";
83 sdev->lddckr = LDDCKR_ICKSEL_MIPI;
85 case SHMOB_DRM_CLK_EXTERNAL:
87 sdev->lddckr = LDDCKR_ICKSEL_HDMI;
93 clk = clk_get(sdev->dev, clkname);
95 dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
103 /* -----------------------------------------------------------------------------
107 static int shmob_drm_unload(struct drm_device *dev)
109 struct shmob_drm_device *sdev = dev->dev_private;
111 drm_kms_helper_poll_fini(dev);
112 drm_mode_config_cleanup(dev);
113 drm_vblank_cleanup(dev);
114 drm_irq_uninstall(dev);
117 clk_put(sdev->clock);
122 dev->dev_private = NULL;
128 static int shmob_drm_load(struct drm_device *dev, unsigned long flags)
130 struct shmob_drm_platform_data *pdata = dev->dev->platform_data;
131 struct platform_device *pdev = dev->platformdev;
132 struct shmob_drm_device *sdev;
133 struct resource *res;
138 dev_err(dev->dev, "no platform data\n");
142 sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
144 dev_err(dev->dev, "failed to allocate private data\n");
148 sdev->dev = &pdev->dev;
150 spin_lock_init(&sdev->irq_lock);
153 dev->dev_private = sdev;
155 /* I/O resources and clocks */
156 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
158 dev_err(&pdev->dev, "failed to get memory resource\n");
163 sdev->mmio = ioremap_nocache(res->start, resource_size(res));
164 if (sdev->mmio == NULL) {
165 dev_err(&pdev->dev, "failed to remap memory resource\n");
170 ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
174 ret = shmob_drm_init_interface(sdev);
178 ret = shmob_drm_modeset_init(sdev);
180 dev_err(&pdev->dev, "failed to initialize mode setting\n");
184 for (i = 0; i < 4; ++i) {
185 ret = shmob_drm_plane_create(sdev, i);
187 dev_err(&pdev->dev, "failed to create plane %u\n", i);
192 ret = drm_vblank_init(dev, 1);
194 dev_err(&pdev->dev, "failed to initialize vblank\n");
198 ret = drm_irq_install(dev);
200 dev_err(&pdev->dev, "failed to install IRQ handler\n");
204 platform_set_drvdata(pdev, sdev);
208 shmob_drm_unload(dev);
213 static void shmob_drm_preclose(struct drm_device *dev, struct drm_file *file)
215 struct shmob_drm_device *sdev = dev->dev_private;
217 shmob_drm_crtc_cancel_page_flip(&sdev->crtc, file);
220 static irqreturn_t shmob_drm_irq(int irq, void *arg)
222 struct drm_device *dev = arg;
223 struct shmob_drm_device *sdev = dev->dev_private;
227 /* Acknowledge interrupts. Putting interrupt enable and interrupt flag
228 * bits in the same register is really brain-dead design and requires
231 spin_lock_irqsave(&sdev->irq_lock, flags);
232 status = lcdc_read(sdev, LDINTR);
233 lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK);
234 spin_unlock_irqrestore(&sdev->irq_lock, flags);
236 if (status & LDINTR_VES) {
237 drm_handle_vblank(dev, 0);
238 shmob_drm_crtc_finish_page_flip(&sdev->crtc);
244 static int shmob_drm_enable_vblank(struct drm_device *dev, int crtc)
246 struct shmob_drm_device *sdev = dev->dev_private;
248 shmob_drm_crtc_enable_vblank(sdev, true);
253 static void shmob_drm_disable_vblank(struct drm_device *dev, int crtc)
255 struct shmob_drm_device *sdev = dev->dev_private;
257 shmob_drm_crtc_enable_vblank(sdev, false);
260 static const struct file_operations shmob_drm_fops = {
261 .owner = THIS_MODULE,
263 .release = drm_release,
264 .unlocked_ioctl = drm_ioctl,
266 .compat_ioctl = drm_compat_ioctl,
270 .fasync = drm_fasync,
272 .mmap = drm_gem_cma_mmap,
275 static struct drm_driver shmob_drm_driver = {
276 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
277 .load = shmob_drm_load,
278 .unload = shmob_drm_unload,
279 .preclose = shmob_drm_preclose,
280 .irq_handler = shmob_drm_irq,
281 .get_vblank_counter = drm_vblank_count,
282 .enable_vblank = shmob_drm_enable_vblank,
283 .disable_vblank = shmob_drm_disable_vblank,
284 .gem_free_object = drm_gem_cma_free_object,
285 .gem_vm_ops = &drm_gem_cma_vm_ops,
286 .dumb_create = drm_gem_cma_dumb_create,
287 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
288 .dumb_destroy = drm_gem_cma_dumb_destroy,
289 .fops = &shmob_drm_fops,
291 .desc = "Renesas SH Mobile DRM",
297 /* -----------------------------------------------------------------------------
302 static int shmob_drm_pm_suspend(struct device *dev)
304 struct shmob_drm_device *sdev = dev_get_drvdata(dev);
306 drm_kms_helper_poll_disable(sdev->ddev);
307 shmob_drm_crtc_suspend(&sdev->crtc);
312 static int shmob_drm_pm_resume(struct device *dev)
314 struct shmob_drm_device *sdev = dev_get_drvdata(dev);
316 drm_modeset_lock_all(sdev->ddev);
317 shmob_drm_crtc_resume(&sdev->crtc);
318 drm_modeset_unlock_all(sdev->ddev);
320 drm_kms_helper_poll_enable(sdev->ddev);
325 static const struct dev_pm_ops shmob_drm_pm_ops = {
326 SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
329 /* -----------------------------------------------------------------------------
333 static int shmob_drm_probe(struct platform_device *pdev)
335 return drm_platform_init(&shmob_drm_driver, pdev);
338 static int shmob_drm_remove(struct platform_device *pdev)
340 drm_platform_exit(&shmob_drm_driver, pdev);
345 static struct platform_driver shmob_drm_platform_driver = {
346 .probe = shmob_drm_probe,
347 .remove = shmob_drm_remove,
349 .owner = THIS_MODULE,
351 .pm = &shmob_drm_pm_ops,
355 module_platform_driver(shmob_drm_platform_driver);
357 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
358 MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver");
359 MODULE_LICENSE("GPL");