0001
0002
0003
0004
0005
0006
0007
0008
0009
0010 #include <linux/clk.h>
0011 #include <linux/io.h>
0012 #include <linux/mm.h>
0013 #include <linux/module.h>
0014 #include <linux/platform_device.h>
0015 #include <linux/pm.h>
0016 #include <linux/slab.h>
0017
0018 #include <drm/drm_crtc_helper.h>
0019 #include <drm/drm_drv.h>
0020 #include <drm/drm_gem_cma_helper.h>
0021 #include <drm/drm_module.h>
0022 #include <drm/drm_probe_helper.h>
0023 #include <drm/drm_vblank.h>
0024
0025 #include "shmob_drm_drv.h"
0026 #include "shmob_drm_kms.h"
0027 #include "shmob_drm_plane.h"
0028 #include "shmob_drm_regs.h"
0029
0030
0031
0032
0033
0034 static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
0035 {
0036 static const u32 ldmt1r[] = {
0037 [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
0038 [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
0039 [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
0040 [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
0041 [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
0042 [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
0043 [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
0044 [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
0045 [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A,
0046 [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B,
0047 [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C,
0048 [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D,
0049 [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9,
0050 [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12,
0051 [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A,
0052 [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B,
0053 [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C,
0054 [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18,
0055 [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24,
0056 };
0057
0058 if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
0059 dev_err(sdev->dev, "invalid interface type %u\n",
0060 sdev->pdata->iface.interface);
0061 return -EINVAL;
0062 }
0063
0064 sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
0065 return 0;
0066 }
0067
0068 static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev,
0069 enum shmob_drm_clk_source clksrc)
0070 {
0071 struct clk *clk;
0072 char *clkname;
0073
0074 switch (clksrc) {
0075 case SHMOB_DRM_CLK_BUS:
0076 clkname = "bus_clk";
0077 sdev->lddckr = LDDCKR_ICKSEL_BUS;
0078 break;
0079 case SHMOB_DRM_CLK_PERIPHERAL:
0080 clkname = "peripheral_clk";
0081 sdev->lddckr = LDDCKR_ICKSEL_MIPI;
0082 break;
0083 case SHMOB_DRM_CLK_EXTERNAL:
0084 clkname = NULL;
0085 sdev->lddckr = LDDCKR_ICKSEL_HDMI;
0086 break;
0087 default:
0088 return -EINVAL;
0089 }
0090
0091 clk = devm_clk_get(sdev->dev, clkname);
0092 if (IS_ERR(clk)) {
0093 dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
0094 return PTR_ERR(clk);
0095 }
0096
0097 sdev->clock = clk;
0098 return 0;
0099 }
0100
0101
0102
0103
0104
0105 static irqreturn_t shmob_drm_irq(int irq, void *arg)
0106 {
0107 struct drm_device *dev = arg;
0108 struct shmob_drm_device *sdev = dev->dev_private;
0109 unsigned long flags;
0110 u32 status;
0111
0112
0113
0114
0115
0116 spin_lock_irqsave(&sdev->irq_lock, flags);
0117 status = lcdc_read(sdev, LDINTR);
0118 lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK);
0119 spin_unlock_irqrestore(&sdev->irq_lock, flags);
0120
0121 if (status & LDINTR_VES) {
0122 drm_handle_vblank(dev, 0);
0123 shmob_drm_crtc_finish_page_flip(&sdev->crtc);
0124 }
0125
0126 return IRQ_HANDLED;
0127 }
0128
0129 DEFINE_DRM_GEM_CMA_FOPS(shmob_drm_fops);
0130
0131 static const struct drm_driver shmob_drm_driver = {
0132 .driver_features = DRIVER_GEM | DRIVER_MODESET,
0133 DRM_GEM_CMA_DRIVER_OPS,
0134 .fops = &shmob_drm_fops,
0135 .name = "shmob-drm",
0136 .desc = "Renesas SH Mobile DRM",
0137 .date = "20120424",
0138 .major = 1,
0139 .minor = 0,
0140 };
0141
0142
0143
0144
0145
0146 #ifdef CONFIG_PM_SLEEP
0147 static int shmob_drm_pm_suspend(struct device *dev)
0148 {
0149 struct shmob_drm_device *sdev = dev_get_drvdata(dev);
0150
0151 drm_kms_helper_poll_disable(sdev->ddev);
0152 shmob_drm_crtc_suspend(&sdev->crtc);
0153
0154 return 0;
0155 }
0156
0157 static int shmob_drm_pm_resume(struct device *dev)
0158 {
0159 struct shmob_drm_device *sdev = dev_get_drvdata(dev);
0160
0161 drm_modeset_lock_all(sdev->ddev);
0162 shmob_drm_crtc_resume(&sdev->crtc);
0163 drm_modeset_unlock_all(sdev->ddev);
0164
0165 drm_kms_helper_poll_enable(sdev->ddev);
0166 return 0;
0167 }
0168 #endif
0169
0170 static const struct dev_pm_ops shmob_drm_pm_ops = {
0171 SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
0172 };
0173
0174
0175
0176
0177
0178 static int shmob_drm_remove(struct platform_device *pdev)
0179 {
0180 struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
0181 struct drm_device *ddev = sdev->ddev;
0182
0183 drm_dev_unregister(ddev);
0184 drm_kms_helper_poll_fini(ddev);
0185 free_irq(sdev->irq, ddev);
0186 drm_dev_put(ddev);
0187
0188 return 0;
0189 }
0190
0191 static int shmob_drm_probe(struct platform_device *pdev)
0192 {
0193 struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
0194 struct shmob_drm_device *sdev;
0195 struct drm_device *ddev;
0196 unsigned int i;
0197 int ret;
0198
0199 if (pdata == NULL) {
0200 dev_err(&pdev->dev, "no platform data\n");
0201 return -EINVAL;
0202 }
0203
0204
0205
0206
0207
0208 sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
0209 if (sdev == NULL)
0210 return -ENOMEM;
0211
0212 sdev->dev = &pdev->dev;
0213 sdev->pdata = pdata;
0214 spin_lock_init(&sdev->irq_lock);
0215
0216 platform_set_drvdata(pdev, sdev);
0217
0218 sdev->mmio = devm_platform_ioremap_resource(pdev, 0);
0219 if (IS_ERR(sdev->mmio))
0220 return PTR_ERR(sdev->mmio);
0221
0222 ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
0223 if (ret < 0)
0224 return ret;
0225
0226 ret = shmob_drm_init_interface(sdev);
0227 if (ret < 0)
0228 return ret;
0229
0230
0231 ddev = drm_dev_alloc(&shmob_drm_driver, &pdev->dev);
0232 if (IS_ERR(ddev))
0233 return PTR_ERR(ddev);
0234
0235 sdev->ddev = ddev;
0236 ddev->dev_private = sdev;
0237
0238 ret = shmob_drm_modeset_init(sdev);
0239 if (ret < 0) {
0240 dev_err(&pdev->dev, "failed to initialize mode setting\n");
0241 goto err_free_drm_dev;
0242 }
0243
0244 for (i = 0; i < 4; ++i) {
0245 ret = shmob_drm_plane_create(sdev, i);
0246 if (ret < 0) {
0247 dev_err(&pdev->dev, "failed to create plane %u\n", i);
0248 goto err_modeset_cleanup;
0249 }
0250 }
0251
0252 ret = drm_vblank_init(ddev, 1);
0253 if (ret < 0) {
0254 dev_err(&pdev->dev, "failed to initialize vblank\n");
0255 goto err_modeset_cleanup;
0256 }
0257
0258 ret = platform_get_irq(pdev, 0);
0259 if (ret < 0)
0260 goto err_modeset_cleanup;
0261 sdev->irq = ret;
0262
0263 ret = request_irq(sdev->irq, shmob_drm_irq, 0, ddev->driver->name,
0264 ddev);
0265 if (ret < 0) {
0266 dev_err(&pdev->dev, "failed to install IRQ handler\n");
0267 goto err_modeset_cleanup;
0268 }
0269
0270
0271
0272
0273
0274 ret = drm_dev_register(ddev, 0);
0275 if (ret < 0)
0276 goto err_irq_uninstall;
0277
0278 return 0;
0279
0280 err_irq_uninstall:
0281 free_irq(sdev->irq, ddev);
0282 err_modeset_cleanup:
0283 drm_kms_helper_poll_fini(ddev);
0284 err_free_drm_dev:
0285 drm_dev_put(ddev);
0286
0287 return ret;
0288 }
0289
0290 static struct platform_driver shmob_drm_platform_driver = {
0291 .probe = shmob_drm_probe,
0292 .remove = shmob_drm_remove,
0293 .driver = {
0294 .name = "shmob-drm",
0295 .pm = &shmob_drm_pm_ops,
0296 },
0297 };
0298
0299 drm_module_platform_driver(shmob_drm_platform_driver);
0300
0301 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
0302 MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver");
0303 MODULE_LICENSE("GPL");