1 // SPDX-License-Identifier: GPL-2.0-only
28 #define DRIVER_DESC	"DRM driver for simple-framebuffer platform devices"
42 		drm_err(dev, "simplefb: invalid framebuffer %s of %u\n",  in simplefb_get_validated_int()
44 		return -EINVAL;  in simplefb_get_validated_int()
54 		drm_err(dev, "simplefb: invalid framebuffer %s of %u\n",  in simplefb_get_validated_int0()
56 		return -EINVAL;  in simplefb_get_validated_int0()
70 		drm_err(dev, "simplefb: missing framebuffer format\n");  in simplefb_get_validated_format()
71 		return ERR_PTR(-EINVAL);  in simplefb_get_validated_format()
75 		if (!strcmp(format_name, fmt->name)) {  in simplefb_get_validated_format()
76 			info = drm_format_info(fmt->fourcc);  in simplefb_get_validated_format()
78 				return ERR_PTR(-EINVAL);  in simplefb_get_validated_format()
84 	drm_err(dev, "simplefb: unknown framebuffer format %s\n",  in simplefb_get_validated_format()
87 	return ERR_PTR(-EINVAL);  in simplefb_get_validated_format()
94 	return simplefb_get_validated_int0(dev, "width", pd->width);  in simplefb_get_width_pd()
101 	return simplefb_get_validated_int0(dev, "height", pd->height);  in simplefb_get_height_pd()
108 	return simplefb_get_validated_int(dev, "stride", pd->stride);  in simplefb_get_stride_pd()
115 	return simplefb_get_validated_format(dev, pd->format);  in simplefb_get_format_pd()
125 		drm_err(dev, "simplefb: cannot parse framebuffer %s: error %d\n",  in simplefb_read_u32_of()
137 		drm_err(dev, "simplefb: cannot parse framebuffer %s: error %d\n",  in simplefb_read_string_of()
187  * Simple Framebuffer device
234  * Here we handle the clocks property of our "simple-framebuffer" dt node.
255 	for (i = 0; i < sdev->clk_count; ++i) {  in simpledrm_device_release_clocks()
256 		if (sdev->clks[i]) {  in simpledrm_device_release_clocks()
257 			clk_disable_unprepare(sdev->clks[i]);  in simpledrm_device_release_clocks()
258 			clk_put(sdev->clks[i]);  in simpledrm_device_release_clocks()
265 	struct drm_device *dev = &sdev->dev;  in simpledrm_device_init_clocks()
266 	struct platform_device *pdev = to_platform_device(dev->dev);  in simpledrm_device_init_clocks()
267 	struct device_node *of_node = pdev->dev.of_node;  in simpledrm_device_init_clocks()
272 	if (dev_get_platdata(&pdev->dev) || !of_node)  in simpledrm_device_init_clocks()
275 	sdev->clk_count = of_clk_get_parent_count(of_node);  in simpledrm_device_init_clocks()
276 	if (!sdev->clk_count)  in simpledrm_device_init_clocks()
279 	sdev->clks = drmm_kzalloc(dev, sdev->clk_count * sizeof(sdev->clks[0]),  in simpledrm_device_init_clocks()
281 	if (!sdev->clks)  in simpledrm_device_init_clocks()
282 		return -ENOMEM;  in simpledrm_device_init_clocks()
284 	for (i = 0; i < sdev->clk_count; ++i) {  in simpledrm_device_init_clocks()
288 			if (ret == -EPROBE_DEFER)  in simpledrm_device_init_clocks()
300 		sdev->clks[i] = clock;  in simpledrm_device_init_clocks()
303 	return devm_add_action_or_reset(&pdev->dev,  in simpledrm_device_init_clocks()
309 		--i;  in simpledrm_device_init_clocks()
310 		if (sdev->clks[i]) {  in simpledrm_device_init_clocks()
311 			clk_disable_unprepare(sdev->clks[i]);  in simpledrm_device_init_clocks()
312 			clk_put(sdev->clks[i]);  in simpledrm_device_init_clocks()
326 #define SUPPLY_SUFFIX "-supply"
331  * Here we handle the num-supplies and vin*-supply properties of our
332  * "simple-framebuffer" dt node. This is necessary so that we can make sure
353 	for (i = 0; i < sdev->regulator_count; ++i) {  in simpledrm_device_release_regulators()
354 		if (sdev->regulators[i]) {  in simpledrm_device_release_regulators()
355 			regulator_disable(sdev->regulators[i]);  in simpledrm_device_release_regulators()
356 			regulator_put(sdev->regulators[i]);  in simpledrm_device_release_regulators()
363 	struct drm_device *dev = &sdev->dev;  in simpledrm_device_init_regulators()
364 	struct platform_device *pdev = to_platform_device(dev->dev);  in simpledrm_device_init_regulators()
365 	struct device_node *of_node = pdev->dev.of_node;  in simpledrm_device_init_regulators()
372 	if (dev_get_platdata(&pdev->dev) || !of_node)  in simpledrm_device_init_regulators()
377 		p = strstr(prop->name, SUPPLY_SUFFIX);  in simpledrm_device_init_regulators()
378 		if (p && p != prop->name)  in simpledrm_device_init_regulators()
385 	sdev->regulators = drmm_kzalloc(dev,  in simpledrm_device_init_regulators()
386 					count * sizeof(sdev->regulators[0]),  in simpledrm_device_init_regulators()
388 	if (!sdev->regulators)  in simpledrm_device_init_regulators()
389 		return -ENOMEM;  in simpledrm_device_init_regulators()
395 		p = strstr(prop->name, SUPPLY_SUFFIX);  in simpledrm_device_init_regulators()
396 		if (!p || p == prop->name)  in simpledrm_device_init_regulators()
398 		len = strlen(prop->name) - strlen(SUPPLY_SUFFIX) + 1;  in simpledrm_device_init_regulators()
399 		strscpy(name, prop->name, min(sizeof(name), len));  in simpledrm_device_init_regulators()
401 		regulator = regulator_get_optional(&pdev->dev, name);  in simpledrm_device_init_regulators()
404 			if (ret == -EPROBE_DEFER)  in simpledrm_device_init_regulators()
419 		sdev->regulators[i++] = regulator;  in simpledrm_device_init_regulators()
421 	sdev->regulator_count = i;  in simpledrm_device_init_regulators()
423 	return devm_add_action_or_reset(&pdev->dev,  in simpledrm_device_init_regulators()
429 		--i;  in simpledrm_device_init_regulators()
430 		if (sdev->regulators[i]) {  in simpledrm_device_init_regulators()
431 			regulator_disable(sdev->regulators[i]);  in simpledrm_device_init_regulators()
432 			regulator_put(sdev->regulators[i]);  in simpledrm_device_init_regulators()
478 	struct drm_framebuffer *fb = plane_state->fb;  in simpledrm_primary_plane_helper_atomic_update()
479 	struct drm_device *dev = plane->dev;  in simpledrm_primary_plane_helper_atomic_update()
494 		struct iosys_map dst = IOSYS_MAP_INIT_VADDR(sdev->screen_base);  in simpledrm_primary_plane_helper_atomic_update()
495 		struct drm_rect dst_clip = plane_state->dst;  in simpledrm_primary_plane_helper_atomic_update()
500 		iosys_map_incr(&dst, drm_fb_clip_offset(sdev->pitch, sdev->format, &dst_clip));  in simpledrm_primary_plane_helper_atomic_update()
501 		drm_fb_blit(&dst, &sdev->pitch, sdev->format->format, shadow_plane_state->data, fb,  in simpledrm_primary_plane_helper_atomic_update()
513 	struct drm_device *dev = plane->dev;  in simpledrm_primary_plane_helper_atomic_disable()
521 	memset_io(sdev->screen_base, 0, sdev->pitch * sdev->mode.vdisplay);  in simpledrm_primary_plane_helper_atomic_disable()
543 	struct simpledrm_device *sdev = simpledrm_device_of_dev(crtc->dev);  in simpledrm_crtc_helper_mode_valid()
545 	return drm_crtc_helper_mode_valid_fixed(crtc, mode, &sdev->mode);  in simpledrm_crtc_helper_mode_valid()
586 	struct simpledrm_device *sdev = simpledrm_device_of_dev(connector->dev);  in simpledrm_connector_helper_get_modes()
588 	return drm_connector_helper_get_modes_fixed(connector, &sdev->mode);  in simpledrm_connector_helper_get_modes()
632 	const struct simplefb_platform_data *pd = dev_get_platdata(&pdev->dev);  in simpledrm_device_create()
633 	struct device_node *of_node = pdev->dev.of_node;  in simpledrm_device_create()
648 	sdev = devm_drm_dev_alloc(&pdev->dev, drv, struct simpledrm_device, dev);  in simpledrm_device_create()
651 	dev = &sdev->dev;  in simpledrm_device_create()
693 		return ERR_PTR(-ENODEV);  in simpledrm_device_create()
698 			return ERR_PTR(-EINVAL);  in simpledrm_device_create()
701 	sdev->mode = simpledrm_mode(width, height);  in simpledrm_device_create()
702 	sdev->format = format;  in simpledrm_device_create()
703 	sdev->pitch = stride;  in simpledrm_device_create()
705 	drm_dbg(dev, "display mode={" DRM_MODE_FMT "}\n", DRM_MODE_ARG(&sdev->mode));  in simpledrm_device_create()
706 	drm_dbg(dev, "framebuffer format=%p4cc, size=%dx%d, stride=%d byte\n",  in simpledrm_device_create()
707 		&format->format, width, height, stride);  in simpledrm_device_create()
715 		return ERR_PTR(-EINVAL);  in simpledrm_device_create()
717 	ret = devm_aperture_acquire_from_firmware(dev, res->start, resource_size(res));  in simpledrm_device_create()
723 	mem = devm_request_mem_region(&pdev->dev, res->start, resource_size(res), drv->name);  in simpledrm_device_create()
728 		 * the I/O-memory resource as-is and try to map that instead.  in simpledrm_device_create()
734 	screen_base = devm_ioremap_wc(&pdev->dev, mem->start, resource_size(mem));  in simpledrm_device_create()
736 		return ERR_PTR(-ENOMEM);  in simpledrm_device_create()
737 	sdev->screen_base = screen_base;  in simpledrm_device_create()
750 	dev->mode_config.min_width = width;  in simpledrm_device_create()
751 	dev->mode_config.max_width = max_width;  in simpledrm_device_create()
752 	dev->mode_config.min_height = height;  in simpledrm_device_create()
753 	dev->mode_config.max_height = max_height;  in simpledrm_device_create()
754 	dev->mode_config.preferred_depth = format->cpp[0] * 8;  in simpledrm_device_create()
755 	dev->mode_config.funcs = &simpledrm_mode_config_funcs;  in simpledrm_device_create()
759 	nformats = drm_fb_build_fourcc_list(dev, &format->format, 1,  in simpledrm_device_create()
762 					    sdev->formats, ARRAY_SIZE(sdev->formats));  in simpledrm_device_create()
764 	primary_plane = &sdev->primary_plane;  in simpledrm_device_create()
766 				       sdev->formats, nformats,  in simpledrm_device_create()
776 	crtc = &sdev->crtc;  in simpledrm_device_create()
785 	encoder = &sdev->encoder;  in simpledrm_device_create()
790 	encoder->possible_crtcs = drm_crtc_mask(crtc);  in simpledrm_device_create()
794 	connector = &sdev->connector;  in simpledrm_device_create()
843 	dev = &sdev->dev;  in simpledrm_probe()
857 	struct drm_device *dev = &sdev->dev;  in simpledrm_remove()
865 	{ .compatible = "simple-framebuffer", },
872 		.name = "simple-framebuffer", /* connect to sysfb */