1 // SPDX-License-Identifier: GPL-2.0-or-later
9 #include <linux/dma-mapping.h>
41 static int lcdif_attach_bridge(struct lcdif_drm_private *lcdif)  in lcdif_attach_bridge()  argument
43 	struct drm_device *drm = lcdif->drm;  in lcdif_attach_bridge()
47 	bridge = devm_drm_of_get_bridge(drm->dev, drm->dev->of_node, 0, 0);  in lcdif_attach_bridge()
51 	ret = drm_bridge_attach(&lcdif->encoder, bridge, NULL, 0);  in lcdif_attach_bridge()
53 		return dev_err_probe(drm->dev, ret, "Failed to attach bridge\n");  in lcdif_attach_bridge()
55 	lcdif->bridge = bridge;  in lcdif_attach_bridge()
63 	struct lcdif_drm_private *lcdif = drm->dev_private;  in lcdif_irq_handler()  local
66 	stat = readl(lcdif->base + LCDC_V8_INT_STATUS_D0);  in lcdif_irq_handler()
71 		reg = readl(lcdif->base + LCDC_V8_CTRLDESCL0_5);  in lcdif_irq_handler()
73 			drm_crtc_handle_vblank(&lcdif->crtc);  in lcdif_irq_handler()
76 	writel(stat, lcdif->base + LCDC_V8_INT_STATUS_D0);  in lcdif_irq_handler()
83 	struct platform_device *pdev = to_platform_device(drm->dev);  in lcdif_load()
84 	struct lcdif_drm_private *lcdif;  in lcdif_load()  local
88 	lcdif = devm_kzalloc(&pdev->dev, sizeof(*lcdif), GFP_KERNEL);  in lcdif_load()
89 	if (!lcdif)  in lcdif_load()
90 		return -ENOMEM;  in lcdif_load()
92 	lcdif->drm = drm;  in lcdif_load()
93 	drm->dev_private = lcdif;  in lcdif_load()
96 	lcdif->base = devm_ioremap_resource(drm->dev, res);  in lcdif_load()
97 	if (IS_ERR(lcdif->base))  in lcdif_load()
98 		return PTR_ERR(lcdif->base);  in lcdif_load()
100 	lcdif->clk = devm_clk_get(drm->dev, "pix");  in lcdif_load()
101 	if (IS_ERR(lcdif->clk))  in lcdif_load()
102 		return PTR_ERR(lcdif->clk);  in lcdif_load()
104 	lcdif->clk_axi = devm_clk_get(drm->dev, "axi");  in lcdif_load()
105 	if (IS_ERR(lcdif->clk_axi))  in lcdif_load()
106 		return PTR_ERR(lcdif->clk_axi);  in lcdif_load()
108 	lcdif->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");  in lcdif_load()
109 	if (IS_ERR(lcdif->clk_disp_axi))  in lcdif_load()
110 		return PTR_ERR(lcdif->clk_disp_axi);  in lcdif_load()
114 	ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(36));  in lcdif_load()
121 	ret = lcdif_kms_init(lcdif);  in lcdif_load()
123 		dev_err(drm->dev, "Failed to initialize KMS pipeline\n");  in lcdif_load()
127 	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);  in lcdif_load()
129 		dev_err(drm->dev, "Failed to initialise vblank\n");  in lcdif_load()
134 	drm_crtc_vblank_off(&lcdif->crtc);  in lcdif_load()
136 	ret = lcdif_attach_bridge(lcdif);  in lcdif_load()
138 		return dev_err_probe(drm->dev, ret, "Cannot connect bridge\n");  in lcdif_load()
140 	drm->mode_config.min_width	= LCDIF_MIN_XRES;  in lcdif_load()
141 	drm->mode_config.min_height	= LCDIF_MIN_YRES;  in lcdif_load()
142 	drm->mode_config.max_width	= LCDIF_MAX_XRES;  in lcdif_load()
143 	drm->mode_config.max_height	= LCDIF_MAX_YRES;  in lcdif_load()
144 	drm->mode_config.funcs		= &lcdif_mode_config_funcs;  in lcdif_load()
145 	drm->mode_config.helper_private	= &lcdif_mode_config_helpers;  in lcdif_load()
152 	lcdif->irq = ret;  in lcdif_load()
154 	ret = devm_request_irq(drm->dev, lcdif->irq, lcdif_irq_handler, 0,  in lcdif_load()
155 			       drm->driver->name, drm);  in lcdif_load()
157 		dev_err(drm->dev, "Failed to install IRQ handler\n");  in lcdif_load()
165 	pm_runtime_enable(drm->dev);  in lcdif_load()
172 	struct lcdif_drm_private *lcdif = drm->dev_private;  in lcdif_unload()  local
174 	pm_runtime_get_sync(drm->dev);  in lcdif_unload()
176 	drm_crtc_vblank_off(&lcdif->crtc);  in lcdif_unload()
181 	pm_runtime_put_sync(drm->dev);  in lcdif_unload()
182 	pm_runtime_disable(drm->dev);  in lcdif_unload()
184 	drm->dev_private = NULL;  in lcdif_unload()
193 	.name	= "imx-lcdif",
194 	.desc	= "i.MX LCDIF Controller DRM",
201 	{ .compatible = "fsl,imx8mp-lcdif" },
211 	drm = drm_dev_alloc(&lcdif_driver, &pdev->dev);  in lcdif_probe()
257 	struct lcdif_drm_private *lcdif = drm->dev_private;  in lcdif_rpm_suspend()  local
260 	clk_disable_unprepare(lcdif->clk);  in lcdif_rpm_suspend()
261 	/* These clock supply the System Bus, AXI, Write Path, LFIFO */  in lcdif_rpm_suspend()
262 	clk_disable_unprepare(lcdif->clk_disp_axi);  in lcdif_rpm_suspend()
264 	clk_disable_unprepare(lcdif->clk_axi);  in lcdif_rpm_suspend()
272 	struct lcdif_drm_private *lcdif = drm->dev_private;  in lcdif_rpm_resume()  local
275 	clk_prepare_enable(lcdif->clk_axi);  in lcdif_rpm_resume()
276 	/* These clock supply the System Bus, AXI, Write Path, LFIFO */  in lcdif_rpm_resume()
277 	clk_prepare_enable(lcdif->clk_disp_axi);  in lcdif_rpm_resume()
279 	clk_prepare_enable(lcdif->clk);  in lcdif_rpm_resume()
315 		.name		= "imx-lcdif",
324 MODULE_DESCRIPTION("Freescale LCDIF DRM/KMS driver");