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 -> 5 formatters -> DSI/DPI
26  *   External      0..5       0..3       A,B,    3 x DSI         bridge
29  * FIFOs A and B are for LCD and HDMI while FIFO CO/C1 are for
41  * helpers. We then provide a bridge to the DSI port, and on the DSI port
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
53  *   the DSI bridge.
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()
133 	if (!mcde->bridge) {  in mcde_modeset_init()
134 		dev_err(drm->dev, "no display output bridge yet\n");  in mcde_modeset_init()
135 		return -EPROBE_DEFER;  in mcde_modeset_init()
138 	mode_config = &drm->mode_config;  in mcde_modeset_init()
139 	mode_config->funcs = &mcde_mode_config_funcs;  in mcde_modeset_init()
140 	mode_config->helper_private = &mcde_mode_config_helpers;  in mcde_modeset_init()
142 	mode_config->min_width = 1;  in mcde_modeset_init()
143 	mode_config->max_width = 1920;  in mcde_modeset_init()
144 	mode_config->min_height = 1;  in mcde_modeset_init()
145 	mode_config->max_height = 1080;  in mcde_modeset_init()
149 		dev_err(drm->dev, "failed to init vblank\n");  in mcde_modeset_init()
155 		dev_err(drm->dev, "failed to init display\n");  in mcde_modeset_init()
160 	 * Attach the DSI bridge  in mcde_modeset_init()
162 	 * TODO: when adding support for the DPI bridge or several DSI bridges,  in mcde_modeset_init()
163 	 * we selectively connect the bridge(s) here instead of this simple  in mcde_modeset_init()
166 	ret = drm_simple_display_pipe_attach_bridge(&mcde->pipe,  in mcde_modeset_init()
167 						    mcde->bridge);  in mcde_modeset_init()
169 		dev_err(drm->dev, "failed to attach display output bridge\n");  in mcde_modeset_init()
205 	ret = component_bind_all(drm->dev, drm);  in mcde_drm_bind()
224 	component_unbind_all(drm->dev, drm);  in mcde_drm_bind()
234 	component_unbind_all(drm->dev, drm);  in mcde_drm_unbind()
253 	struct device *dev = &pdev->dev;  in mcde_probe()
266 	drm = &mcde->drm;  in mcde_probe()
267 	mcde->dev = dev;  in mcde_probe()
271 	mcde->epod = devm_regulator_get(dev, "epod");  in mcde_probe()
272 	if (IS_ERR(mcde->epod)) {  in mcde_probe()
273 		ret = PTR_ERR(mcde->epod);  in mcde_probe()
277 	ret = regulator_enable(mcde->epod);  in mcde_probe()
282 	mcde->vana = devm_regulator_get(dev, "vana");  in mcde_probe()
283 	if (IS_ERR(mcde->vana)) {  in mcde_probe()
284 		ret = PTR_ERR(mcde->vana);  in mcde_probe()
288 	ret = regulator_enable(mcde->vana);  in mcde_probe()
295 	 * the v-esram34 regulator, but we don't use that yet  in mcde_probe()
299 	mcde->mcde_clk = devm_clk_get(dev, "mcde");  in mcde_probe()
300 	if (IS_ERR(mcde->mcde_clk)) {  in mcde_probe()
302 		ret = PTR_ERR(mcde->mcde_clk);  in mcde_probe()
305 	ret = clk_prepare_enable(mcde->mcde_clk);  in mcde_probe()
310 	dev_info(dev, "MCDE clk rate %lu Hz\n", clk_get_rate(mcde->mcde_clk));  in mcde_probe()
312 	mcde->lcd_clk = devm_clk_get(dev, "lcd");  in mcde_probe()
313 	if (IS_ERR(mcde->lcd_clk)) {  in mcde_probe()
315 		ret = PTR_ERR(mcde->lcd_clk);  in mcde_probe()
318 	mcde->hdmi_clk = devm_clk_get(dev, "hdmi");  in mcde_probe()
319 	if (IS_ERR(mcde->hdmi_clk)) {  in mcde_probe()
320 		dev_err(dev, "unable to get HDMI clock\n");  in mcde_probe()
321 		ret = PTR_ERR(mcde->hdmi_clk);  in mcde_probe()
326 	mcde->regs = devm_ioremap_resource(dev, res);  in mcde_probe()
327 	if (IS_ERR(mcde->regs)) {  in mcde_probe()
329 		ret = -EINVAL;  in mcde_probe()
335 		ret = -EINVAL;  in mcde_probe()
351 	pid = readl(mcde->regs + MCDE_PID);  in mcde_probe()
363 		ret = -ENODEV;  in mcde_probe()
369 	writel(0, mcde->regs + MCDE_IMSCERR);  in mcde_probe()
370 	writel(0xFFFFFFFF, mcde->regs + MCDE_RISERR);  in mcde_probe()
377 		struct device_driver *drv = &mcde_component_drivers[i]->driver;  in mcde_probe()
389 		ret = -ENODEV;  in mcde_probe()
404 	ret = regulator_disable(mcde->epod);  in mcde_probe()
412 	ret = component_master_add_with_match(&pdev->dev, &mcde_drm_comp_ops,  in mcde_probe()
420 		clk_disable_unprepare(mcde->mcde_clk);  in mcde_probe()
421 		regulator_disable(mcde->vana);  in mcde_probe()
428 	clk_disable_unprepare(mcde->mcde_clk);  in mcde_probe()
430 	regulator_disable(mcde->vana);  in mcde_probe()
432 	regulator_disable(mcde->epod);  in mcde_probe()
442 	component_master_del(&pdev->dev, &mcde_drm_comp_ops);  in mcde_remove()
443 	clk_disable_unprepare(mcde->mcde_clk);  in mcde_remove()
444 	regulator_disable(mcde->vana);  in mcde_remove()
445 	regulator_disable(mcde->epod);  in mcde_remove()
492 MODULE_ALIAS("platform:mcde-drm");