1 // SPDX-License-Identifier: GPL-2.0
3  * DRM driver for MIPI DBI compatible display panels
59 		if (strcmp(format_name, format->name))  in panel_mipi_dbi_get_format()
62 		formats[0] = format->fourcc;  in panel_mipi_dbi_get_format()
63 		*bpp = format->bpp;  in panel_mipi_dbi_get_format()
69 	return -EINVAL;  in panel_mipi_dbi_get_format()
88 	 * MIPI commands to execute when the display pipeline is enabled.
96 	 * parameter: delay in miliseconds (the No Operation command is part of the MIPI Display
122 	const struct panel_mipi_dbi_config *config = (struct panel_mipi_dbi_config *)fw->data;  in panel_mipi_dbi_check_commands()
124 	size_t size = fw->size, commands_len;  in panel_mipi_dbi_check_commands()
129 		return ERR_PTR(-EINVAL);  in panel_mipi_dbi_check_commands()
132 	if (memcmp(config->magic, panel_mipi_dbi_magic, sizeof(config->magic))) {  in panel_mipi_dbi_check_commands()
133 		dev_err(dev, "config: Bad magic: %15ph\n", config->magic);  in panel_mipi_dbi_check_commands()
134 		return ERR_PTR(-EINVAL);  in panel_mipi_dbi_check_commands()
137 	if (config->file_format_version != 1) {  in panel_mipi_dbi_check_commands()
138 		dev_err(dev, "config: version=%u is not supported\n", config->file_format_version);  in panel_mipi_dbi_check_commands()
139 		return ERR_PTR(-EINVAL);  in panel_mipi_dbi_check_commands()
142 	drm_dev_dbg(dev, DRM_UT_DRIVER, "size=%zu version=%u\n", size, config->file_format_version);  in panel_mipi_dbi_check_commands()
144 	commands_len = size - sizeof(*config);  in panel_mipi_dbi_check_commands()
147 		u8 command = config->commands[i++];  in panel_mipi_dbi_check_commands()
148 		u8 num_parameters = config->commands[i++];  in panel_mipi_dbi_check_commands()
149 		const u8 *parameters = &config->commands[i];  in panel_mipi_dbi_check_commands()
155 			return ERR_PTR(-EINVAL);  in panel_mipi_dbi_check_commands()
167 		return ERR_PTR(-EINVAL);  in panel_mipi_dbi_check_commands()
172 		return ERR_PTR(-ENOMEM);  in panel_mipi_dbi_check_commands()
174 	commands->len = commands_len;  in panel_mipi_dbi_check_commands()
175 	commands->buf = devm_kmemdup(dev, config->commands, commands->len, GFP_KERNEL);  in panel_mipi_dbi_check_commands()
176 	if (!commands->buf)  in panel_mipi_dbi_check_commands()
177 		return ERR_PTR(-ENOMEM);  in panel_mipi_dbi_check_commands()
190 	ret = of_property_read_string_index(dev->of_node, "compatible", 0, &compatible);  in panel_mipi_dbi_commands_from_fw()
217 	while (i < commands->len) {  in panel_mipi_dbi_commands_execute()
218 		u8 command = commands->buf[i++];  in panel_mipi_dbi_commands_execute()
219 		u8 num_parameters = commands->buf[i++];  in panel_mipi_dbi_commands_execute()
220 		const u8 *parameters = &commands->buf[i];  in panel_mipi_dbi_commands_execute()
237 	struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);  in panel_mipi_dbi_enable()
238 	struct mipi_dbi *dbi = &dbidev->dbi;  in panel_mipi_dbi_enable()
241 	if (!drm_dev_enter(pipe->crtc.dev, &idx))  in panel_mipi_dbi_enable()
244 	drm_dbg(pipe->crtc.dev, "\n");  in panel_mipi_dbi_enable()
250 		panel_mipi_dbi_commands_execute(dbi, dbidev->driver_private);  in panel_mipi_dbi_enable()
268 	.name			= "panel-mipi-dbi",
269 	.desc			= "MIPI DBI compatible display panel",
275 static int panel_mipi_dbi_get_mode(struct mipi_dbi_dev *dbidev, struct drm_display_mode *mode)  in panel_mipi_dbi_get_mode()  argument
277 	struct device *dev = dbidev->drm.dev;  in panel_mipi_dbi_get_mode()
281 	ret = of_get_drm_panel_display_mode(dev->of_node, mode, NULL);  in panel_mipi_dbi_get_mode()
283 		dev_err(dev, "%pOF: failed to get panel-timing (error=%d)\n", dev->of_node, ret);  in panel_mipi_dbi_get_mode()
287 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in panel_mipi_dbi_get_mode()
289 	hback_porch = mode->htotal - mode->hsync_end;  in panel_mipi_dbi_get_mode()
290 	vback_porch = mode->vtotal - mode->vsync_end;  in panel_mipi_dbi_get_mode()
295 	 * width and height don't exceed the 16-bit value specified by MIPI DCS.  in panel_mipi_dbi_get_mode()
297 	if (!mode->hdisplay || !mode->vdisplay || mode->flags ||  in panel_mipi_dbi_get_mode()
298 	    mode->hsync_end > mode->hdisplay || (hback_porch + mode->hdisplay) > 0xffff ||  in panel_mipi_dbi_get_mode()
299 	    mode->vsync_end > mode->vdisplay || (vback_porch + mode->vdisplay) > 0xffff) {  in panel_mipi_dbi_get_mode()
300 		dev_err(dev, "%pOF: panel-timing out of bounds\n", dev->of_node);  in panel_mipi_dbi_get_mode()
301 		return -EINVAL;  in panel_mipi_dbi_get_mode()
305 	if (!mode->clock)  in panel_mipi_dbi_get_mode()
306 		mode->clock = mode->htotal * mode->vtotal * 60 / 1000;  in panel_mipi_dbi_get_mode()
308 	dbidev->top_offset = vback_porch;  in panel_mipi_dbi_get_mode()
309 	dbidev->left_offset = hback_porch;  in panel_mipi_dbi_get_mode()
316 	struct device *dev = &spi->dev;  in panel_mipi_dbi_spi_probe()
317 	struct drm_display_mode mode;  in panel_mipi_dbi_spi_probe()  local
331 	dbi = &dbidev->dbi;  in panel_mipi_dbi_spi_probe()
332 	drm = &dbidev->drm;  in panel_mipi_dbi_spi_probe()
334 	ret = panel_mipi_dbi_get_mode(dbidev, &mode);  in panel_mipi_dbi_spi_probe()
338 	dbidev->regulator = devm_regulator_get(dev, "power");  in panel_mipi_dbi_spi_probe()
339 	if (IS_ERR(dbidev->regulator))  in panel_mipi_dbi_spi_probe()
340 		return dev_err_probe(dev, PTR_ERR(dbidev->regulator),  in panel_mipi_dbi_spi_probe()
343 	dbidev->io_regulator = devm_regulator_get(dev, "io");  in panel_mipi_dbi_spi_probe()
344 	if (IS_ERR(dbidev->io_regulator))  in panel_mipi_dbi_spi_probe()
345 		return dev_err_probe(dev, PTR_ERR(dbidev->io_regulator),  in panel_mipi_dbi_spi_probe()
348 	dbidev->backlight = devm_of_find_backlight(dev);  in panel_mipi_dbi_spi_probe()
349 	if (IS_ERR(dbidev->backlight))  in panel_mipi_dbi_spi_probe()
350 		return dev_err_probe(dev, PTR_ERR(dbidev->backlight), "Failed to get backlight\n");  in panel_mipi_dbi_spi_probe()
352 	dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);  in panel_mipi_dbi_spi_probe()
353 	if (IS_ERR(dbi->reset))  in panel_mipi_dbi_spi_probe()
354 		return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");  in panel_mipi_dbi_spi_probe()
365 	if (device_property_present(dev, "write-only"))  in panel_mipi_dbi_spi_probe()
366 		dbi->read_commands = NULL;  in panel_mipi_dbi_spi_probe()
368 	dbidev->driver_private = panel_mipi_dbi_commands_from_fw(dev);  in panel_mipi_dbi_spi_probe()
369 	if (IS_ERR(dbidev->driver_private))  in panel_mipi_dbi_spi_probe()
370 		return PTR_ERR(dbidev->driver_private);  in panel_mipi_dbi_spi_probe()
376 	buf_size = DIV_ROUND_UP(mode.hdisplay * mode.vdisplay * bpp, 8);  in panel_mipi_dbi_spi_probe()
379 					     &mode, 0, buf_size);  in panel_mipi_dbi_spi_probe()
426 	{ .compatible = "panel-mipi-dbi-spi" },
432 	{ "panel-mipi-dbi-spi", 0 },
439 		.name = "panel-mipi-dbi-spi",
450 MODULE_DESCRIPTION("MIPI DBI compatible display panel driver");