1 // SPDX-License-Identifier: GPL-2.0-only
3  * (C) COPYRIGHT 2012-2013 ARM Limited. All rights reserved.
7  * Copyright (c) 2006-2008 Intel Corporation
29  * - Fix race between setting plane base address and getting IRQ for
32  * - Read back hardware state at boot to skip reprogramming the
33  *   hardware when doing a no-op modeset.
35  * - Use the CLKSEL bit to support switching between the two external
40 #include <linux/dma-buf.h>
75 	struct pl111_drm_dev_private *priv = dev->dev_private;  in pl111_modeset_init()
76 	struct device_node *np = dev->dev->of_node;  in pl111_modeset_init()
78 	struct drm_panel *panel = NULL;  in pl111_modeset_init()  local
88 	mode_config = &dev->mode_config;  in pl111_modeset_init()
89 	mode_config->funcs = &mode_config_funcs;  in pl111_modeset_init()
90 	mode_config->min_width = 1;  in pl111_modeset_init()
91 	mode_config->max_width = 1024;  in pl111_modeset_init()
92 	mode_config->min_height = 1;  in pl111_modeset_init()
93 	mode_config->max_height = 768;  in pl111_modeset_init()
100 		dev_dbg(dev->dev, "checking endpoint %d\n", i);  in pl111_modeset_init()
102 		ret = drm_of_find_panel_or_bridge(dev->dev->of_node,  in pl111_modeset_init()
107 			if (ret == -EPROBE_DEFER) {  in pl111_modeset_init()
110 				 * another way of saying -ENODEV, but let's  in pl111_modeset_init()
114 			} else if (ret != -ENODEV) {  in pl111_modeset_init()
116 				dev_err(dev->dev,  in pl111_modeset_init()
122 			dev_info(dev->dev,  in pl111_modeset_init()
123 				 "found panel on endpoint %d\n", i);  in pl111_modeset_init()
124 			panel = tmp_panel;  in pl111_modeset_init()
127 			dev_info(dev->dev,  in pl111_modeset_init()
136 	 * If we can't find neither panel nor bridge on any of the  in pl111_modeset_init()
137 	 * endpoints, and any of them retured -EPROBE_DEFER, then  in pl111_modeset_init()
140 	if ((!panel && !bridge) && defer)  in pl111_modeset_init()
141 		return -EPROBE_DEFER;  in pl111_modeset_init()
143 	if (panel) {  in pl111_modeset_init()
144 		bridge = drm_panel_bridge_add_typed(panel,  in pl111_modeset_init()
151 		dev_info(dev->dev, "Using non-panel bridge\n");  in pl111_modeset_init()
153 		dev_err(dev->dev, "No bridge, exiting\n");  in pl111_modeset_init()
154 		return -ENODEV;  in pl111_modeset_init()
157 	priv->bridge = bridge;  in pl111_modeset_init()
158 	if (panel) {  in pl111_modeset_init()
159 		priv->panel = panel;  in pl111_modeset_init()
160 		priv->connector = drm_panel_bridge_connector(bridge);  in pl111_modeset_init()
165 		dev_err(dev->dev, "Failed to init display\n");  in pl111_modeset_init()
169 	ret = drm_simple_display_pipe_attach_bridge(&priv->pipe,  in pl111_modeset_init()
174 	if (!priv->variant->broken_vblank) {  in pl111_modeset_init()
177 			dev_err(dev->dev, "Failed to init vblank\n");  in pl111_modeset_init()
189 	if (panel)  in pl111_modeset_init()
200 	struct pl111_drm_dev_private *priv = dev->dev_private;  in pl111_gem_import_sg_table()
203 	 * When using device-specific reserved memory we can't import  in pl111_gem_import_sg_table()
205 	 * memory and we can only handle a specific range of memory.  in pl111_gem_import_sg_table()
207 	if (priv->use_device_memory)  in pl111_gem_import_sg_table()
208 		return ERR_PTR(-EINVAL);  in pl111_gem_import_sg_table()
237 	struct device *dev = &amba_dev->dev;  in pl111_amba_probe()
239 	const struct pl111_variant_data *variant = id->data;  in pl111_amba_probe()
245 		return -ENOMEM;  in pl111_amba_probe()
251 	priv->drm = drm;  in pl111_amba_probe()
252 	drm->dev_private = priv;  in pl111_amba_probe()
253 	priv->variant = variant;  in pl111_amba_probe()
257 		dev_info(dev, "using device-specific reserved memory\n");  in pl111_amba_probe()
258 		priv->use_device_memory = true;  in pl111_amba_probe()
261 	if (of_property_read_u32(dev->of_node, "max-memory-bandwidth",  in pl111_amba_probe()
262 				 &priv->memory_bw)) {  in pl111_amba_probe()
264 		priv->memory_bw = 0;  in pl111_amba_probe()
268 	if (variant->is_pl110 || variant->is_lcdc) {  in pl111_amba_probe()
269 		priv->ienb = CLCD_PL110_IENB;  in pl111_amba_probe()
270 		priv->ctrl = CLCD_PL110_CNTL;  in pl111_amba_probe()
272 		priv->ienb = CLCD_PL111_IENB;  in pl111_amba_probe()
273 		priv->ctrl = CLCD_PL111_CNTL;  in pl111_amba_probe()
276 	priv->regs = devm_ioremap_resource(dev, &amba_dev->res);  in pl111_amba_probe()
277 	if (IS_ERR(priv->regs)) {  in pl111_amba_probe()
279 		ret = PTR_ERR(priv->regs);  in pl111_amba_probe()
291 	writel(0, priv->regs + priv->ienb);  in pl111_amba_probe()
293 	ret = devm_request_irq(dev, amba_dev->irq[0], pl111_irq, 0,  in pl111_amba_probe()
294 			       variant->name, priv);  in pl111_amba_probe()
308 	drm_fbdev_dma_setup(drm, priv->variant->fb_depth);  in pl111_amba_probe()
321 	struct device *dev = &amba_dev->dev;  in pl111_amba_remove()
323 	struct pl111_drm_dev_private *priv = drm->dev_private;  in pl111_amba_remove()
327 	if (priv->panel)  in pl111_amba_remove()
328 		drm_panel_bridge_remove(priv->bridge);  in pl111_amba_remove()
436 		.name = "drm-clcd-pl111",