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
40  * one FIFO and one formatter which we connect to the simple CMA framebuffer
46  * - Enabled damaged rectangles using drm_plane_enable_fb_damage_clips()
48  *   command-only display.
49  * - Enable mixing of more planes, possibly at the cost of moving away
50  *   from using the simple framebuffer pipeline.
51  * - Enable output to bridges such as the AV8100 HDMI encoder from
57 #include <linux/dma-buf.h>
151 	val = readl(mcde->regs + MCDE_MISERR);  in mcde_irq()
156 		dev_info(mcde->dev, "some error IRQ\n");  in mcde_irq()
157 	writel(val, mcde->regs + MCDE_RISERR);  in mcde_irq()
165 	struct mcde *mcde = drm->dev_private;  in mcde_modeset_init()
168 	if (!mcde->bridge) {  in mcde_modeset_init()
169 		dev_err(drm->dev, "no display output bridge yet\n");  in mcde_modeset_init()
170 		return -EPROBE_DEFER;  in mcde_modeset_init()
173 	mode_config = &drm->mode_config;  in mcde_modeset_init()
174 	mode_config->funcs = &mcde_mode_config_funcs;  in mcde_modeset_init()
175 	mode_config->helper_private = &mcde_mode_config_helpers;  in mcde_modeset_init()
177 	mode_config->min_width = 1;  in mcde_modeset_init()
178 	mode_config->max_width = 1920;  in mcde_modeset_init()
179 	mode_config->min_height = 1;  in mcde_modeset_init()
180 	mode_config->max_height = 1080;  in mcde_modeset_init()
188 	if (mcde->te_sync) {  in mcde_modeset_init()
191 			dev_err(drm->dev, "failed to init vblank\n");  in mcde_modeset_init()
198 		dev_err(drm->dev, "failed to init display\n");  in mcde_modeset_init()
206 	 * we selectively connect the bridge(s) here instead of this simple  in mcde_modeset_init()
209 	ret = drm_simple_display_pipe_attach_bridge(&mcde->pipe,  in mcde_modeset_init()
210 						    mcde->bridge);  in mcde_modeset_init()
212 		dev_err(drm->dev, "failed to attach display output bridge\n");  in mcde_modeset_init()
229 	struct mcde *mcde = drm->dev_private;  in mcde_release()
271 	ret = component_bind_all(drm->dev, drm);  in mcde_drm_bind()
288 	component_unbind_all(drm->dev, drm);  in mcde_drm_bind()
298 	component_unbind_all(drm->dev, drm);  in mcde_drm_unbind()
317 	struct device *dev = &pdev->dev;  in mcde_probe()
330 		return -ENOMEM;  in mcde_probe()
331 	mcde->dev = dev;  in mcde_probe()
333 	ret = drm_dev_init(&mcde->drm, &mcde_drm_driver, dev);  in mcde_probe()
338 	drm = &mcde->drm;  in mcde_probe()
339 	drm->dev_private = mcde;  in mcde_probe()
343 	mcde->te_sync = true;  in mcde_probe()
344 	/* Enable continuous updates: this is what Linux' framebuffer expects */  in mcde_probe()
345 	mcde->oneshot_mode = false;  in mcde_probe()
346 	drm->dev_private = mcde;  in mcde_probe()
349 	mcde->epod = devm_regulator_get(dev, "epod");  in mcde_probe()
350 	if (IS_ERR(mcde->epod)) {  in mcde_probe()
351 		ret = PTR_ERR(mcde->epod);  in mcde_probe()
355 	ret = regulator_enable(mcde->epod);  in mcde_probe()
360 	mcde->vana = devm_regulator_get(dev, "vana");  in mcde_probe()
361 	if (IS_ERR(mcde->vana)) {  in mcde_probe()
362 		ret = PTR_ERR(mcde->vana);  in mcde_probe()
366 	ret = regulator_enable(mcde->vana);  in mcde_probe()
373 	 * the v-esram34 regulator, but we don't use that yet  in mcde_probe()
377 	mcde->mcde_clk = devm_clk_get(dev, "mcde");  in mcde_probe()
378 	if (IS_ERR(mcde->mcde_clk)) {  in mcde_probe()
380 		ret = PTR_ERR(mcde->mcde_clk);  in mcde_probe()
383 	ret = clk_prepare_enable(mcde->mcde_clk);  in mcde_probe()
388 	dev_info(dev, "MCDE clk rate %lu Hz\n", clk_get_rate(mcde->mcde_clk));  in mcde_probe()
390 	mcde->lcd_clk = devm_clk_get(dev, "lcd");  in mcde_probe()
391 	if (IS_ERR(mcde->lcd_clk)) {  in mcde_probe()
393 		ret = PTR_ERR(mcde->lcd_clk);  in mcde_probe()
396 	mcde->hdmi_clk = devm_clk_get(dev, "hdmi");  in mcde_probe()
397 	if (IS_ERR(mcde->hdmi_clk)) {  in mcde_probe()
399 		ret = PTR_ERR(mcde->hdmi_clk);  in mcde_probe()
404 	mcde->regs = devm_ioremap_resource(dev, res);  in mcde_probe()
405 	if (IS_ERR(mcde->regs)) {  in mcde_probe()
407 		ret = -EINVAL;  in mcde_probe()
413 		ret = -EINVAL;  in mcde_probe()
429 	pid = readl(mcde->regs + MCDE_PID);  in mcde_probe()
441 		ret = -ENODEV;  in mcde_probe()
458 	writel(val, mcde->regs + MCDE_CONF0);  in mcde_probe()
461 	val = readl(mcde->regs + MCDE_CR);  in mcde_probe()
463 	writel(val, mcde->regs + MCDE_CR);  in mcde_probe()
467 	writel(0, mcde->regs + MCDE_IMSCERR);  in mcde_probe()
468 	writel(0xFFFFFFFF, mcde->regs + MCDE_RISERR);  in mcde_probe()
475 		struct device_driver *drv = &mcde_component_drivers[i]->driver;  in mcde_probe()
487 		return -ENODEV;  in mcde_probe()
494 	ret = component_master_add_with_match(&pdev->dev, &mcde_drm_comp_ops,  in mcde_probe()
503 	clk_disable_unprepare(mcde->mcde_clk);  in mcde_probe()
505 	regulator_disable(mcde->vana);  in mcde_probe()
507 	regulator_disable(mcde->epod);  in mcde_probe()
517 	struct mcde *mcde = drm->dev_private;  in mcde_remove()
519 	component_master_del(&pdev->dev, &mcde_drm_comp_ops);  in mcde_remove()
520 	clk_disable_unprepare(mcde->mcde_clk);  in mcde_remove()
521 	regulator_disable(mcde->vana);  in mcde_remove()
522 	regulator_disable(mcde->epod);  in mcde_remove()
570 MODULE_ALIAS("platform:mcde-drm");