1 // SPDX-License-Identifier: GPL-2.0-only
30 #define DRIVER_DESC	"DRM driver for simple-framebuffer platform devices"
44 		drm_err(dev, "simplefb: invalid framebuffer %s of %u\n",  in simplefb_get_validated_int()
46 		return -EINVAL;  in simplefb_get_validated_int()
56 		drm_err(dev, "simplefb: invalid framebuffer %s of %u\n",  in simplefb_get_validated_int0()
58 		return -EINVAL;  in simplefb_get_validated_int0()
72 		drm_err(dev, "simplefb: missing framebuffer format\n");  in simplefb_get_validated_format()
73 		return ERR_PTR(-EINVAL);  in simplefb_get_validated_format()
77 		if (!strcmp(format_name, fmt->name)) {  in simplefb_get_validated_format()
78 			info = drm_format_info(fmt->fourcc);  in simplefb_get_validated_format()
80 				return ERR_PTR(-EINVAL);  in simplefb_get_validated_format()
86 	drm_err(dev, "simplefb: unknown framebuffer format %s\n",  in simplefb_get_validated_format()
89 	return ERR_PTR(-EINVAL);  in simplefb_get_validated_format()
96 	return simplefb_get_validated_int0(dev, "width", pd->width);  in simplefb_get_width_pd()
103 	return simplefb_get_validated_int0(dev, "height", pd->height);  in simplefb_get_height_pd()
110 	return simplefb_get_validated_int(dev, "stride", pd->stride);  in simplefb_get_stride_pd()
117 	return simplefb_get_validated_format(dev, pd->format);  in simplefb_get_format_pd()
127 		drm_err(dev, "simplefb: cannot parse framebuffer %s: error %d\n",  in simplefb_read_u32_of()
139 		drm_err(dev, "simplefb: cannot parse framebuffer %s: error %d\n",  in simplefb_read_string_of()
195 	np = of_parse_phandle(of_node, "memory-region", 0);  in simplefb_get_memory_of()
199 	res = devm_kzalloc(dev->dev, sizeof(*res), GFP_KERNEL);  in simplefb_get_memory_of()
201 		return ERR_PTR(-ENOMEM);  in simplefb_get_memory_of()
208 		drm_warn(dev, "preferring \"memory-region\" over \"reg\" property\n");  in simplefb_get_memory_of()
214  * Simple Framebuffer device
261  * Here we handle the clocks property of our "simple-framebuffer" dt node.
282 	for (i = 0; i < sdev->clk_count; ++i) {  in simpledrm_device_release_clocks()
283 		if (sdev->clks[i]) {  in simpledrm_device_release_clocks()
284 			clk_disable_unprepare(sdev->clks[i]);  in simpledrm_device_release_clocks()
285 			clk_put(sdev->clks[i]);  in simpledrm_device_release_clocks()
292 	struct drm_device *dev = &sdev->dev;  in simpledrm_device_init_clocks()
293 	struct platform_device *pdev = to_platform_device(dev->dev);  in simpledrm_device_init_clocks()
294 	struct device_node *of_node = pdev->dev.of_node;  in simpledrm_device_init_clocks()
299 	if (dev_get_platdata(&pdev->dev) || !of_node)  in simpledrm_device_init_clocks()
302 	sdev->clk_count = of_clk_get_parent_count(of_node);  in simpledrm_device_init_clocks()
303 	if (!sdev->clk_count)  in simpledrm_device_init_clocks()
306 	sdev->clks = drmm_kzalloc(dev, sdev->clk_count * sizeof(sdev->clks[0]),  in simpledrm_device_init_clocks()
308 	if (!sdev->clks)  in simpledrm_device_init_clocks()
309 		return -ENOMEM;  in simpledrm_device_init_clocks()
311 	for (i = 0; i < sdev->clk_count; ++i) {  in simpledrm_device_init_clocks()
315 			if (ret == -EPROBE_DEFER)  in simpledrm_device_init_clocks()
327 		sdev->clks[i] = clock;  in simpledrm_device_init_clocks()
330 	return devm_add_action_or_reset(&pdev->dev,  in simpledrm_device_init_clocks()
336 		--i;  in simpledrm_device_init_clocks()
337 		if (sdev->clks[i]) {  in simpledrm_device_init_clocks()
338 			clk_disable_unprepare(sdev->clks[i]);  in simpledrm_device_init_clocks()
339 			clk_put(sdev->clks[i]);  in simpledrm_device_init_clocks()
353 #define SUPPLY_SUFFIX "-supply"
358  * Here we handle the num-supplies and vin*-supply properties of our
359  * "simple-framebuffer" dt node. This is necessary so that we can make sure
380 	for (i = 0; i < sdev->regulator_count; ++i) {  in simpledrm_device_release_regulators()
381 		if (sdev->regulators[i]) {  in simpledrm_device_release_regulators()
382 			regulator_disable(sdev->regulators[i]);  in simpledrm_device_release_regulators()
383 			regulator_put(sdev->regulators[i]);  in simpledrm_device_release_regulators()
390 	struct drm_device *dev = &sdev->dev;  in simpledrm_device_init_regulators()
391 	struct platform_device *pdev = to_platform_device(dev->dev);  in simpledrm_device_init_regulators()
392 	struct device_node *of_node = pdev->dev.of_node;  in simpledrm_device_init_regulators()
399 	if (dev_get_platdata(&pdev->dev) || !of_node)  in simpledrm_device_init_regulators()
404 		p = strstr(prop->name, SUPPLY_SUFFIX);  in simpledrm_device_init_regulators()
405 		if (p && p != prop->name)  in simpledrm_device_init_regulators()
412 	sdev->regulators = drmm_kzalloc(dev,  in simpledrm_device_init_regulators()
413 					count * sizeof(sdev->regulators[0]),  in simpledrm_device_init_regulators()
415 	if (!sdev->regulators)  in simpledrm_device_init_regulators()
416 		return -ENOMEM;  in simpledrm_device_init_regulators()
422 		p = strstr(prop->name, SUPPLY_SUFFIX);  in simpledrm_device_init_regulators()
423 		if (!p || p == prop->name)  in simpledrm_device_init_regulators()
425 		len = strlen(prop->name) - strlen(SUPPLY_SUFFIX) + 1;  in simpledrm_device_init_regulators()
426 		strscpy(name, prop->name, min(sizeof(name), len));  in simpledrm_device_init_regulators()
428 		regulator = regulator_get_optional(&pdev->dev, name);  in simpledrm_device_init_regulators()
431 			if (ret == -EPROBE_DEFER)  in simpledrm_device_init_regulators()
446 		sdev->regulators[i++] = regulator;  in simpledrm_device_init_regulators()
448 	sdev->regulator_count = i;  in simpledrm_device_init_regulators()
450 	return devm_add_action_or_reset(&pdev->dev,  in simpledrm_device_init_regulators()
456 		--i;  in simpledrm_device_init_regulators()
457 		if (sdev->regulators[i]) {  in simpledrm_device_init_regulators()
458 			regulator_disable(sdev->regulators[i]);  in simpledrm_device_init_regulators()
459 			regulator_put(sdev->regulators[i]);  in simpledrm_device_init_regulators()
486 	struct drm_framebuffer *fb = plane_state->fb;  in simpledrm_primary_plane_helper_atomic_update()
487 	struct drm_device *dev = plane->dev;  in simpledrm_primary_plane_helper_atomic_update()
502 		struct drm_rect dst_clip = plane_state->dst;  in simpledrm_primary_plane_helper_atomic_update()
503 		struct iosys_map dst = sdev->screen_base;  in simpledrm_primary_plane_helper_atomic_update()
508 		iosys_map_incr(&dst, drm_fb_clip_offset(sdev->pitch, sdev->format, &dst_clip));  in simpledrm_primary_plane_helper_atomic_update()
509 		drm_fb_blit(&dst, &sdev->pitch, sdev->format->format, shadow_plane_state->data,  in simpledrm_primary_plane_helper_atomic_update()
521 	struct drm_device *dev = plane->dev;  in simpledrm_primary_plane_helper_atomic_disable()
529 	iosys_map_memset(&sdev->screen_base, 0, 0, sdev->pitch * sdev->mode.vdisplay);  in simpledrm_primary_plane_helper_atomic_disable()
551 	struct simpledrm_device *sdev = simpledrm_device_of_dev(crtc->dev);  in simpledrm_crtc_helper_mode_valid()
553 	return drm_crtc_helper_mode_valid_fixed(crtc, mode, &sdev->mode);  in simpledrm_crtc_helper_mode_valid()
581 	struct simpledrm_device *sdev = simpledrm_device_of_dev(connector->dev);  in simpledrm_connector_helper_get_modes()
583 	return drm_connector_helper_get_modes_fixed(connector, &sdev->mode);  in simpledrm_connector_helper_get_modes()
623 	const struct simplefb_platform_data *pd = dev_get_platdata(&pdev->dev);  in simpledrm_device_create()
624 	struct device_node *of_node = pdev->dev.of_node;  in simpledrm_device_create()
640 	sdev = devm_drm_dev_alloc(&pdev->dev, drv, struct simpledrm_device, dev);  in simpledrm_device_create()
643 	dev = &sdev->dev;  in simpledrm_device_create()
688 			simplefb_read_u32_of(dev, panel_node, "width-mm", &width_mm);  in simpledrm_device_create()
689 			simplefb_read_u32_of(dev, panel_node, "height-mm", &height_mm);  in simpledrm_device_create()
694 		return ERR_PTR(-ENODEV);  in simpledrm_device_create()
699 			return ERR_PTR(-EINVAL);  in simpledrm_device_create()
711 	sdev->mode = simpledrm_mode(width, height, width_mm, height_mm);  in simpledrm_device_create()
712 	sdev->format = format;  in simpledrm_device_create()
713 	sdev->pitch = stride;  in simpledrm_device_create()
715 	drm_dbg(dev, "display mode={" DRM_MODE_FMT "}\n", DRM_MODE_ARG(&sdev->mode));  in simpledrm_device_create()
716 	drm_dbg(dev, "framebuffer format=%p4cc, size=%dx%d, stride=%d byte\n",  in simpledrm_device_create()
717 		&format->format, width, height, stride);  in simpledrm_device_create()
726 		ret = devm_aperture_acquire_from_firmware(dev, mem->start, resource_size(mem));  in simpledrm_device_create()
732 		drm_dbg(dev, "using system memory framebuffer at %pr\n", mem);  in simpledrm_device_create()
734 		screen_base = devm_memremap(dev->dev, mem->start, resource_size(mem), MEMREMAP_WC);  in simpledrm_device_create()
738 		iosys_map_set_vaddr(&sdev->screen_base, screen_base);  in simpledrm_device_create()
744 			return ERR_PTR(-EINVAL);  in simpledrm_device_create()
746 		ret = devm_aperture_acquire_from_firmware(dev, res->start, resource_size(res));  in simpledrm_device_create()
752 		drm_dbg(dev, "using I/O memory framebuffer at %pr\n", res);  in simpledrm_device_create()
754 		mem = devm_request_mem_region(&pdev->dev, res->start, resource_size(res),  in simpledrm_device_create()
755 					      drv->name);  in simpledrm_device_create()
760 			 * the I/O-memory resource as-is and try to map that instead.  in simpledrm_device_create()
766 		screen_base = devm_ioremap_wc(&pdev->dev, mem->start, resource_size(mem));  in simpledrm_device_create()
768 			return ERR_PTR(-ENOMEM);  in simpledrm_device_create()
770 		iosys_map_set_vaddr_iomem(&sdev->screen_base, screen_base);  in simpledrm_device_create()
784 	dev->mode_config.min_width = width;  in simpledrm_device_create()
785 	dev->mode_config.max_width = max_width;  in simpledrm_device_create()
786 	dev->mode_config.min_height = height;  in simpledrm_device_create()
787 	dev->mode_config.max_height = max_height;  in simpledrm_device_create()
788 	dev->mode_config.preferred_depth = format->depth;  in simpledrm_device_create()
789 	dev->mode_config.funcs = &simpledrm_mode_config_funcs;  in simpledrm_device_create()
793 	nformats = drm_fb_build_fourcc_list(dev, &format->format, 1,  in simpledrm_device_create()
794 					    sdev->formats, ARRAY_SIZE(sdev->formats));  in simpledrm_device_create()
796 	primary_plane = &sdev->primary_plane;  in simpledrm_device_create()
798 				       sdev->formats, nformats,  in simpledrm_device_create()
808 	crtc = &sdev->crtc;  in simpledrm_device_create()
817 	encoder = &sdev->encoder;  in simpledrm_device_create()
822 	encoder->possible_crtcs = drm_crtc_mask(crtc);  in simpledrm_device_create()
826 	connector = &sdev->connector;  in simpledrm_device_create()
876 	dev = &sdev->dev;  in simpledrm_probe()
882 	color_mode = drm_format_info_bpp(sdev->format, 0);  in simpledrm_probe()
884 		color_mode = sdev->format->depth; // can be 15 or 16  in simpledrm_probe()
894 	struct drm_device *dev = &sdev->dev;  in simpledrm_remove()
900 	{ .compatible = "simple-framebuffer", },
907 		.name = "simple-framebuffer", /* connect to sysfb */