1 // SPDX-License-Identifier: GPL-2.0+
3  * shmob_drm_drv.c  --  SH Mobile DRM driver
34 /* -----------------------------------------------------------------------------
47 		sdev->lddckr = LDDCKR_ICKSEL_BUS;  in shmob_drm_setup_clocks()
51 		sdev->lddckr = LDDCKR_ICKSEL_MIPI;  in shmob_drm_setup_clocks()
55 		sdev->lddckr = LDDCKR_ICKSEL_HDMI;  in shmob_drm_setup_clocks()
58 		return -EINVAL;  in shmob_drm_setup_clocks()
61 	clk = devm_clk_get(sdev->dev, clkname);  in shmob_drm_setup_clocks()
63 		dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);  in shmob_drm_setup_clocks()
67 	sdev->clock = clk;  in shmob_drm_setup_clocks()
71 /* -----------------------------------------------------------------------------
83 	 * bits in the same register is really brain-dead design and requires  in shmob_drm_irq()
86 	spin_lock_irqsave(&sdev->irq_lock, flags);  in shmob_drm_irq()
89 	spin_unlock_irqrestore(&sdev->irq_lock, flags);  in shmob_drm_irq()
92 		drm_crtc_handle_vblank(&sdev->crtc.base);  in shmob_drm_irq()
93 		shmob_drm_crtc_finish_page_flip(&sdev->crtc);  in shmob_drm_irq()
105 	.name			= "shmob-drm",
112 /* -----------------------------------------------------------------------------
120 	return drm_mode_config_helper_suspend(&sdev->ddev);  in shmob_drm_pm_suspend()
127 	return drm_mode_config_helper_resume(&sdev->ddev);  in shmob_drm_pm_resume()
134 	if (sdev->clock)  in shmob_drm_pm_runtime_suspend()
135 		clk_disable_unprepare(sdev->clock);  in shmob_drm_pm_runtime_suspend()
145 	if (sdev->clock) {  in shmob_drm_pm_runtime_resume()
146 		ret = clk_prepare_enable(sdev->clock);  in shmob_drm_pm_runtime_resume()
160 /* -----------------------------------------------------------------------------
167 	struct drm_device *ddev = &sdev->ddev;  in shmob_drm_remove()
176 	struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;  in shmob_drm_probe()
182 	config = of_device_get_match_data(&pdev->dev);  in shmob_drm_probe()
184 		dev_err(&pdev->dev, "no platform data\n");  in shmob_drm_probe()
185 		return -EINVAL;  in shmob_drm_probe()
192 	sdev = devm_drm_dev_alloc(&pdev->dev, &shmob_drm_driver,  in shmob_drm_probe()
197 	ddev = &sdev->ddev;  in shmob_drm_probe()
198 	sdev->dev = &pdev->dev;  in shmob_drm_probe()
200 		sdev->config = *config;  in shmob_drm_probe()
202 		sdev->pdata = pdata;  in shmob_drm_probe()
203 		sdev->config.clk_source = pdata->clk_source;  in shmob_drm_probe()
204 		sdev->config.clk_div = pdata->iface.clk_div;  in shmob_drm_probe()
206 	spin_lock_init(&sdev->irq_lock);  in shmob_drm_probe()
210 	sdev->mmio = devm_platform_ioremap_resource(pdev, 0);  in shmob_drm_probe()
211 	if (IS_ERR(sdev->mmio))  in shmob_drm_probe()
212 		return PTR_ERR(sdev->mmio);  in shmob_drm_probe()
214 	ret = shmob_drm_setup_clocks(sdev, sdev->config.clk_source);  in shmob_drm_probe()
218 	ret = devm_pm_runtime_enable(&pdev->dev);  in shmob_drm_probe()
224 		dev_err(&pdev->dev, "failed to initialize vblank\n");  in shmob_drm_probe()
230 		return dev_err_probe(&pdev->dev, ret,  in shmob_drm_probe()
236 	sdev->irq = ret;  in shmob_drm_probe()
238 	ret = devm_request_irq(&pdev->dev, sdev->irq, shmob_drm_irq, 0,  in shmob_drm_probe()
239 			       ddev->driver->name, ddev);  in shmob_drm_probe()
241 		dev_err(&pdev->dev, "failed to install IRQ handler\n");  in shmob_drm_probe()
268 	{ .compatible = "renesas,r8a7740-lcdc",	.data = &shmob_arm_config, },
269 	{ .compatible = "renesas,sh73a0-lcdc",	.data = &shmob_arm_config, },
277 		.name	= "shmob-drm",