1 // SPDX-License-Identifier: GPL-2.0-or-later
9 #include <linux/dma-mapping.h>
47 static int lcdif_attach_bridge(struct lcdif_drm_private *lcdif)  in lcdif_attach_bridge()  argument
49 	struct device *dev = lcdif->drm->dev;  in lcdif_attach_bridge()
54 	for_each_endpoint_of_node(dev->of_node, ep) {  in lcdif_attach_bridge()
73 		bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, of_ep.id);  in lcdif_attach_bridge()
86 			return -ENOMEM;  in lcdif_attach_bridge()
89 		encoder->possible_crtcs = drm_crtc_mask(&lcdif->crtc);  in lcdif_attach_bridge()
90 		ret = drm_encoder_init(lcdif->drm, encoder, &lcdif_encoder_funcs,  in lcdif_attach_bridge()
114 	struct lcdif_drm_private *lcdif = drm->dev_private;  in lcdif_irq_handler()  local
117 	stat = readl(lcdif->base + LCDC_V8_INT_STATUS_D0);  in lcdif_irq_handler()
122 		reg = readl(lcdif->base + LCDC_V8_CTRLDESCL0_5);  in lcdif_irq_handler()
124 			drm_crtc_handle_vblank(&lcdif->crtc);  in lcdif_irq_handler()
127 	writel(stat, lcdif->base + LCDC_V8_INT_STATUS_D0);  in lcdif_irq_handler()
134 	struct platform_device *pdev = to_platform_device(drm->dev);  in lcdif_load()
135 	struct lcdif_drm_private *lcdif;  in lcdif_load()  local
139 	lcdif = devm_kzalloc(&pdev->dev, sizeof(*lcdif), GFP_KERNEL);  in lcdif_load()
140 	if (!lcdif)  in lcdif_load()
141 		return -ENOMEM;  in lcdif_load()
143 	lcdif->drm = drm;  in lcdif_load()
144 	drm->dev_private = lcdif;  in lcdif_load()
147 	lcdif->base = devm_ioremap_resource(drm->dev, res);  in lcdif_load()
148 	if (IS_ERR(lcdif->base))  in lcdif_load()
149 		return PTR_ERR(lcdif->base);  in lcdif_load()
151 	lcdif->clk = devm_clk_get(drm->dev, "pix");  in lcdif_load()
152 	if (IS_ERR(lcdif->clk))  in lcdif_load()
153 		return PTR_ERR(lcdif->clk);  in lcdif_load()
155 	lcdif->clk_axi = devm_clk_get(drm->dev, "axi");  in lcdif_load()
156 	if (IS_ERR(lcdif->clk_axi))  in lcdif_load()
157 		return PTR_ERR(lcdif->clk_axi);  in lcdif_load()
159 	lcdif->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");  in lcdif_load()
160 	if (IS_ERR(lcdif->clk_disp_axi))  in lcdif_load()
161 		return PTR_ERR(lcdif->clk_disp_axi);  in lcdif_load()
165 	ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(36));  in lcdif_load()
172 		dev_err(drm->dev, "Failed to initialize mode config\n");  in lcdif_load()
176 	ret = lcdif_kms_init(lcdif);  in lcdif_load()
178 		dev_err(drm->dev, "Failed to initialize KMS pipeline\n");  in lcdif_load()
182 	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);  in lcdif_load()
184 		dev_err(drm->dev, "Failed to initialise vblank\n");  in lcdif_load()
189 	drm_crtc_vblank_off(&lcdif->crtc);  in lcdif_load()
191 	ret = lcdif_attach_bridge(lcdif);  in lcdif_load()
193 		return dev_err_probe(drm->dev, ret, "Cannot connect bridge\n");  in lcdif_load()
195 	drm->mode_config.min_width	= LCDIF_MIN_XRES;  in lcdif_load()
196 	drm->mode_config.min_height	= LCDIF_MIN_YRES;  in lcdif_load()
197 	drm->mode_config.max_width	= LCDIF_MAX_XRES;  in lcdif_load()
198 	drm->mode_config.max_height	= LCDIF_MAX_YRES;  in lcdif_load()
199 	drm->mode_config.funcs		= &lcdif_mode_config_funcs;  in lcdif_load()
200 	drm->mode_config.helper_private	= &lcdif_mode_config_helpers;  in lcdif_load()
207 	lcdif->irq = ret;  in lcdif_load()
209 	ret = devm_request_irq(drm->dev, lcdif->irq, lcdif_irq_handler, 0,  in lcdif_load()
210 			       drm->driver->name, drm);  in lcdif_load()
212 		dev_err(drm->dev, "Failed to install IRQ handler\n");  in lcdif_load()
220 	pm_runtime_enable(drm->dev);  in lcdif_load()
227 	struct lcdif_drm_private *lcdif = drm->dev_private;  in lcdif_unload()  local
229 	pm_runtime_get_sync(drm->dev);  in lcdif_unload()
231 	drm_crtc_vblank_off(&lcdif->crtc);  in lcdif_unload()
235 	pm_runtime_put_sync(drm->dev);  in lcdif_unload()
236 	pm_runtime_disable(drm->dev);  in lcdif_unload()
238 	drm->dev_private = NULL;  in lcdif_unload()
247 	.name	= "imx-lcdif",
248 	.desc	= "i.MX LCDIF Controller DRM",
255 	{ .compatible = "fsl,imx8mp-lcdif" },
256 	{ .compatible = "fsl,imx93-lcdif" },
266 	drm = drm_dev_alloc(&lcdif_driver, &pdev->dev);  in lcdif_probe()
310 	struct lcdif_drm_private *lcdif = drm->dev_private;  in lcdif_rpm_suspend()  local
313 	clk_disable_unprepare(lcdif->clk);  in lcdif_rpm_suspend()
314 	/* These clock supply the System Bus, AXI, Write Path, LFIFO */  in lcdif_rpm_suspend()
315 	clk_disable_unprepare(lcdif->clk_disp_axi);  in lcdif_rpm_suspend()
317 	clk_disable_unprepare(lcdif->clk_axi);  in lcdif_rpm_suspend()
325 	struct lcdif_drm_private *lcdif = drm->dev_private;  in lcdif_rpm_resume()  local
328 	clk_prepare_enable(lcdif->clk_axi);  in lcdif_rpm_resume()
329 	/* These clock supply the System Bus, AXI, Write Path, LFIFO */  in lcdif_rpm_resume()
330 	clk_prepare_enable(lcdif->clk_disp_axi);  in lcdif_rpm_resume()
332 	clk_prepare_enable(lcdif->clk);  in lcdif_rpm_resume()
372 		.name		= "imx-lcdif",
381 MODULE_DESCRIPTION("Freescale LCDIF DRM/KMS driver");