1 // SPDX-License-Identifier: GPL-2.0
5  * (C) ST-Ericsson SA 2013
9  * DOC: ST-Ericsson MCDE Driver
11  * The MCDE (short for multi-channel display engine) is a graphics
15  * ST-Ericsson U8500 where is was used for mass-market deployments
18  * It can do 1080p30 on SDTV CCIR656, DPI-2, DBI-2 or DSI for
25  *   Memory     -> Overlay -> Channel -> FIFO -> 8 formatters -> DSI/DPI
27  *   source 0..9                         C0,C1   2 x DPI
32  * 2 of the formatters are for DPI.
34  * Behind the formatters are the DSI or DPI ports that route to
36  * DPI port, it is possible to configure up to 4 display pipelines
42  * bridge we connect hang a panel bridge or other bridge. This may be subject
47  * - Enabled damaged rectangles using drm_plane_enable_fb_damage_clips()
49  *   command-only display.
50  * - Enable mixing of more planes, possibly at the cost of moving away
52  * - Enable output to bridges such as the AV8100 HDMI encoder from
58 #include <linux/dma-buf.h>
116 	val = readl(mcde->regs + MCDE_MISERR);  in mcde_irq()
121 		dev_info(mcde->dev, "some error IRQ\n");  in mcde_irq()
122 	writel(val, mcde->regs + MCDE_RISERR);  in mcde_irq()
134 	 * If no other bridge was found, check if we have a DPI panel or  in mcde_modeset_init()
135 	 * any other bridge connected directly to the MCDE DPI output.  in mcde_modeset_init()
141 	if (!mcde->bridge) {  in mcde_modeset_init()
142 		struct drm_panel *panel;  in mcde_modeset_init()  local
145 		ret = drm_of_find_panel_or_bridge(drm->dev->of_node,  in mcde_modeset_init()
146 						  0, 0, &panel, &bridge);  in mcde_modeset_init()
148 			dev_err(drm->dev,  in mcde_modeset_init()
149 				"Could not locate any output bridge or panel\n");  in mcde_modeset_init()
152 		if (panel) {  in mcde_modeset_init()
153 			bridge = drm_panel_bridge_add_typed(panel,  in mcde_modeset_init()
156 				dev_err(drm->dev,  in mcde_modeset_init()
157 					"Could not connect panel bridge\n");  in mcde_modeset_init()
161 		mcde->dpi_output = true;  in mcde_modeset_init()
162 		mcde->bridge = bridge;  in mcde_modeset_init()
163 		mcde->flow_mode = MCDE_DPI_FORMATTER_FLOW;  in mcde_modeset_init()
166 	mode_config = &drm->mode_config;  in mcde_modeset_init()
167 	mode_config->funcs = &mcde_mode_config_funcs;  in mcde_modeset_init()
168 	mode_config->helper_private = &mcde_mode_config_helpers;  in mcde_modeset_init()
170 	mode_config->min_width = 1;  in mcde_modeset_init()
171 	mode_config->max_width = 1920;  in mcde_modeset_init()
172 	mode_config->min_height = 1;  in mcde_modeset_init()
173 	mode_config->max_height = 1080;  in mcde_modeset_init()
177 		dev_err(drm->dev, "failed to init vblank\n");  in mcde_modeset_init()
183 		dev_err(drm->dev, "failed to init display\n");  in mcde_modeset_init()
188 	ret = drm_simple_display_pipe_attach_bridge(&mcde->pipe,  in mcde_modeset_init()
189 						    mcde->bridge);  in mcde_modeset_init()
191 		dev_err(drm->dev, "failed to attach display output bridge\n");  in mcde_modeset_init()
226 	ret = component_bind_all(drm->dev, drm);  in mcde_drm_bind()
245 	component_unbind_all(drm->dev, drm);  in mcde_drm_bind()
255 	component_unbind_all(drm->dev, drm);  in mcde_drm_unbind()
269 	struct device *dev = &pdev->dev;  in mcde_probe()
281 	drm = &mcde->drm;  in mcde_probe()
282 	mcde->dev = dev;  in mcde_probe()
286 	mcde->epod = devm_regulator_get(dev, "epod");  in mcde_probe()
287 	if (IS_ERR(mcde->epod)) {  in mcde_probe()
288 		ret = PTR_ERR(mcde->epod);  in mcde_probe()
292 	ret = regulator_enable(mcde->epod);  in mcde_probe()
297 	mcde->vana = devm_regulator_get(dev, "vana");  in mcde_probe()
298 	if (IS_ERR(mcde->vana)) {  in mcde_probe()
299 		ret = PTR_ERR(mcde->vana);  in mcde_probe()
303 	ret = regulator_enable(mcde->vana);  in mcde_probe()
310 	 * the v-esram34 regulator, but we don't use that yet  in mcde_probe()
314 	mcde->mcde_clk = devm_clk_get(dev, "mcde");  in mcde_probe()
315 	if (IS_ERR(mcde->mcde_clk)) {  in mcde_probe()
317 		ret = PTR_ERR(mcde->mcde_clk);  in mcde_probe()
320 	ret = clk_prepare_enable(mcde->mcde_clk);  in mcde_probe()
325 	dev_info(dev, "MCDE clk rate %lu Hz\n", clk_get_rate(mcde->mcde_clk));  in mcde_probe()
327 	mcde->lcd_clk = devm_clk_get(dev, "lcd");  in mcde_probe()
328 	if (IS_ERR(mcde->lcd_clk)) {  in mcde_probe()
330 		ret = PTR_ERR(mcde->lcd_clk);  in mcde_probe()
333 	mcde->hdmi_clk = devm_clk_get(dev, "hdmi");  in mcde_probe()
334 	if (IS_ERR(mcde->hdmi_clk)) {  in mcde_probe()
336 		ret = PTR_ERR(mcde->hdmi_clk);  in mcde_probe()
340 	mcde->regs = devm_platform_ioremap_resource(pdev, 0);  in mcde_probe()
341 	if (IS_ERR(mcde->regs)) {  in mcde_probe()
343 		ret = -EINVAL;  in mcde_probe()
365 	pid = readl(mcde->regs + MCDE_PID);  in mcde_probe()
377 		ret = -ENODEV;  in mcde_probe()
383 	writel(0, mcde->regs + MCDE_IMSCERR);  in mcde_probe()
384 	writel(0xFFFFFFFF, mcde->regs + MCDE_RISERR);  in mcde_probe()
391 		struct device_driver *drv = &mcde_component_drivers[i]->driver;  in mcde_probe()
403 		ret = -ENODEV;  in mcde_probe()
418 	ret = regulator_disable(mcde->epod);  in mcde_probe()
426 	ret = component_master_add_with_match(&pdev->dev, &mcde_drm_comp_ops,  in mcde_probe()
434 		clk_disable_unprepare(mcde->mcde_clk);  in mcde_probe()
435 		regulator_disable(mcde->vana);  in mcde_probe()
442 	clk_disable_unprepare(mcde->mcde_clk);  in mcde_probe()
444 	regulator_disable(mcde->vana);  in mcde_probe()
446 	regulator_disable(mcde->epod);  in mcde_probe()
456 	component_master_del(&pdev->dev, &mcde_drm_comp_ops);  in mcde_remove()
457 	clk_disable_unprepare(mcde->mcde_clk);  in mcde_remove()
458 	regulator_disable(mcde->vana);  in mcde_remove()
459 	regulator_disable(mcde->epod);  in mcde_remove()
466 	if (drm->registered)  in mcde_shutdown()
496 		return -ENODEV;  in mcde_drm_register()
516 MODULE_ALIAS("platform:mcde-drm");