1 // SPDX-License-Identifier: GPL-2.0+
3 * shmob_drm_drv.c -- SH Mobile DRM driver
5 * Copyright (C) 2012 Renesas Electronics Corporation
7 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
10 #include <linux/clk.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
16 #include <linux/slab.h>
18 #include <drm/drm_crtc_helper.h>
19 #include <drm/drm_drv.h>
20 #include <drm/drm_gem_cma_helper.h>
21 #include <drm/drm_module.h>
22 #include <drm/drm_probe_helper.h>
23 #include <drm/drm_vblank.h>
25 #include "shmob_drm_drv.h"
26 #include "shmob_drm_kms.h"
27 #include "shmob_drm_plane.h"
28 #include "shmob_drm_regs.h"
30 /* -----------------------------------------------------------------------------
31 * Hardware initialization
34 static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
36 static const u32 ldmt1r[] = {
37 [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
38 [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
39 [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
40 [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
41 [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
42 [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
43 [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
44 [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
45 [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A,
46 [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B,
47 [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C,
48 [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D,
49 [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9,
50 [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12,
51 [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A,
52 [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B,
53 [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C,
54 [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18,
55 [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24,
58 if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
59 dev_err(sdev->dev, "invalid interface type %u\n",
60 sdev->pdata->iface.interface);
64 sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
68 static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev,
69 enum shmob_drm_clk_source clksrc)
75 case SHMOB_DRM_CLK_BUS:
77 sdev->lddckr = LDDCKR_ICKSEL_BUS;
79 case SHMOB_DRM_CLK_PERIPHERAL:
80 clkname = "peripheral_clk";
81 sdev->lddckr = LDDCKR_ICKSEL_MIPI;
83 case SHMOB_DRM_CLK_EXTERNAL:
85 sdev->lddckr = LDDCKR_ICKSEL_HDMI;
91 clk = devm_clk_get(sdev->dev, clkname);
93 dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
101 /* -----------------------------------------------------------------------------
105 static irqreturn_t shmob_drm_irq(int irq, void *arg)
107 struct drm_device *dev = arg;
108 struct shmob_drm_device *sdev = dev->dev_private;
112 /* Acknowledge interrupts. Putting interrupt enable and interrupt flag
113 * bits in the same register is really brain-dead design and requires
116 spin_lock_irqsave(&sdev->irq_lock, flags);
117 status = lcdc_read(sdev, LDINTR);
118 lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK);
119 spin_unlock_irqrestore(&sdev->irq_lock, flags);
121 if (status & LDINTR_VES) {
122 drm_handle_vblank(dev, 0);
123 shmob_drm_crtc_finish_page_flip(&sdev->crtc);
129 DEFINE_DRM_GEM_CMA_FOPS(shmob_drm_fops);
131 static const struct drm_driver shmob_drm_driver = {
132 .driver_features = DRIVER_GEM | DRIVER_MODESET,
133 DRM_GEM_CMA_DRIVER_OPS,
134 .fops = &shmob_drm_fops,
136 .desc = "Renesas SH Mobile DRM",
142 /* -----------------------------------------------------------------------------
146 #ifdef CONFIG_PM_SLEEP
147 static int shmob_drm_pm_suspend(struct device *dev)
149 struct shmob_drm_device *sdev = dev_get_drvdata(dev);
151 drm_kms_helper_poll_disable(sdev->ddev);
152 shmob_drm_crtc_suspend(&sdev->crtc);
157 static int shmob_drm_pm_resume(struct device *dev)
159 struct shmob_drm_device *sdev = dev_get_drvdata(dev);
161 drm_modeset_lock_all(sdev->ddev);
162 shmob_drm_crtc_resume(&sdev->crtc);
163 drm_modeset_unlock_all(sdev->ddev);
165 drm_kms_helper_poll_enable(sdev->ddev);
170 static const struct dev_pm_ops shmob_drm_pm_ops = {
171 SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
174 /* -----------------------------------------------------------------------------
178 static int shmob_drm_remove(struct platform_device *pdev)
180 struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
181 struct drm_device *ddev = sdev->ddev;
183 drm_dev_unregister(ddev);
184 drm_kms_helper_poll_fini(ddev);
185 free_irq(sdev->irq, ddev);
191 static int shmob_drm_probe(struct platform_device *pdev)
193 struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
194 struct shmob_drm_device *sdev;
195 struct drm_device *ddev;
200 dev_err(&pdev->dev, "no platform data\n");
205 * Allocate and initialize the driver private data, I/O resources and
208 sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
212 sdev->dev = &pdev->dev;
214 spin_lock_init(&sdev->irq_lock);
216 platform_set_drvdata(pdev, sdev);
218 sdev->mmio = devm_platform_ioremap_resource(pdev, 0);
219 if (IS_ERR(sdev->mmio))
220 return PTR_ERR(sdev->mmio);
222 ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
226 ret = shmob_drm_init_interface(sdev);
230 /* Allocate and initialize the DRM device. */
231 ddev = drm_dev_alloc(&shmob_drm_driver, &pdev->dev);
233 return PTR_ERR(ddev);
236 ddev->dev_private = sdev;
238 ret = shmob_drm_modeset_init(sdev);
240 dev_err(&pdev->dev, "failed to initialize mode setting\n");
241 goto err_free_drm_dev;
244 for (i = 0; i < 4; ++i) {
245 ret = shmob_drm_plane_create(sdev, i);
247 dev_err(&pdev->dev, "failed to create plane %u\n", i);
248 goto err_modeset_cleanup;
252 ret = drm_vblank_init(ddev, 1);
254 dev_err(&pdev->dev, "failed to initialize vblank\n");
255 goto err_modeset_cleanup;
258 ret = platform_get_irq(pdev, 0);
260 goto err_modeset_cleanup;
263 ret = request_irq(sdev->irq, shmob_drm_irq, 0, ddev->driver->name,
266 dev_err(&pdev->dev, "failed to install IRQ handler\n");
267 goto err_modeset_cleanup;
271 * Register the DRM device with the core and the connectors with
274 ret = drm_dev_register(ddev, 0);
276 goto err_irq_uninstall;
281 free_irq(sdev->irq, ddev);
283 drm_kms_helper_poll_fini(ddev);
290 static struct platform_driver shmob_drm_platform_driver = {
291 .probe = shmob_drm_probe,
292 .remove = shmob_drm_remove,
295 .pm = &shmob_drm_pm_ops,
299 drm_module_platform_driver(shmob_drm_platform_driver);
301 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
302 MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver");
303 MODULE_LICENSE("GPL");