1 // SPDX-License-Identifier: GPL-2.0
28 #define FLD_MASK(start, end)    (((1 << ((start) - (end) + 1)) - 1) << (end))
42 /* DSI layer registers */
43 #define DSI_STARTDSI		0x0204 /* START control bit of DSI-TX */
125 #define SYS_RST_I2CS		BIT(0) /* Reset I2C-Slave controller */
126 #define SYS_RST_I2CM		BIT(1) /* Reset I2C-Master controller */
127 #define SYS_RST_LCD		BIT(2) /* Reset LCD controller */
128 #define SYS_RST_BM		BIT(3) /* Reset Bus Management controller */
129 #define SYS_RST_DSIRX		BIT(4) /* Reset DSI-RX and App controller */
136 /* Lane enable PPI and DSI register bits */
165 	int ret = ctx->error;  in tc358764_clear_error()
167 	ctx->error = 0;  in tc358764_clear_error()
173 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in tc358764_read()  local
176 	if (ctx->error)  in tc358764_read()
180 	ret = mipi_dsi_generic_read(dsi, &addr, sizeof(addr), val, sizeof(*val));  in tc358764_read()
184 	dev_dbg(ctx->dev, "read: %d, addr: %d\n", addr, *val);  in tc358764_read()
189 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in tc358764_write()  local
193 	if (ctx->error)  in tc358764_write()
203 	ret = mipi_dsi_generic_write(dsi, data, sizeof(data));  in tc358764_write()
205 		ctx->error = ret;  in tc358764_write()
224 	if (ctx->error)  in tc358764_init()
226 	dev_info(ctx->dev, "ID: %#x\n", v);  in tc358764_init()
275 	gpiod_set_value(ctx->gpio_reset, 1);  in tc358764_reset()
277 	gpiod_set_value(ctx->gpio_reset, 0);  in tc358764_reset()
285 	return drm_panel_get_modes(ctx->panel, connector);  in tc358764_get_modes()
304 	int ret = drm_panel_disable(bridge_to_tc358764(bridge)->panel);  in tc358764_disable()
307 		dev_err(ctx->dev, "error disabling panel (%d)\n", ret);  in tc358764_disable()
315 	ret = drm_panel_unprepare(ctx->panel);  in tc358764_post_disable()
317 		dev_err(ctx->dev, "error unpreparing panel (%d)\n", ret);  in tc358764_post_disable()
320 	ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);  in tc358764_post_disable()
322 		dev_err(ctx->dev, "error disabling regulators (%d)\n", ret);  in tc358764_post_disable()
330 	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);  in tc358764_pre_enable()
332 		dev_err(ctx->dev, "error enabling regulators (%d)\n", ret);  in tc358764_pre_enable()
337 		dev_err(ctx->dev, "error initializing bridge (%d)\n", ret);  in tc358764_pre_enable()
338 	ret = drm_panel_prepare(ctx->panel);  in tc358764_pre_enable()
340 		dev_err(ctx->dev, "error preparing panel (%d)\n", ret);  in tc358764_pre_enable()
346 	int ret = drm_panel_enable(ctx->panel);  in tc358764_enable()
349 		dev_err(ctx->dev, "error enabling panel (%d)\n", ret);  in tc358764_enable()
356 	struct drm_device *drm = bridge->dev;  in tc358764_attach()
361 		return -EINVAL;  in tc358764_attach()
364 	ctx->connector.polled = DRM_CONNECTOR_POLL_HPD;  in tc358764_attach()
365 	ret = drm_connector_init(drm, &ctx->connector,  in tc358764_attach()
373 	drm_connector_helper_add(&ctx->connector,  in tc358764_attach()
375 	drm_connector_attach_encoder(&ctx->connector, bridge->encoder);  in tc358764_attach()
376 	ctx->connector.funcs->reset(&ctx->connector);  in tc358764_attach()
377 	drm_connector_register(&ctx->connector);  in tc358764_attach()
386 	drm_connector_unregister(&ctx->connector);  in tc358764_detach()
387 	ctx->panel = NULL;  in tc358764_detach()
388 	drm_connector_put(&ctx->connector);  in tc358764_detach()
402 	struct device *dev = ctx->dev;  in tc358764_parse_dt()
405 	ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);  in tc358764_parse_dt()
406 	if (IS_ERR(ctx->gpio_reset)) {  in tc358764_parse_dt()
408 		return PTR_ERR(ctx->gpio_reset);  in tc358764_parse_dt()
411 	ret = drm_of_find_panel_or_bridge(ctx->dev->of_node, 1, 0, &ctx->panel,  in tc358764_parse_dt()
413 	if (ret && ret != -EPROBE_DEFER)  in tc358764_parse_dt()
423 	for (i = 0; i < ARRAY_SIZE(ctx->supplies); ++i)  in tc358764_configure_regulators()
424 		ctx->supplies[i].supply = tc358764_supplies[i];  in tc358764_configure_regulators()
426 	ret = devm_regulator_bulk_get(ctx->dev, ARRAY_SIZE(ctx->supplies),  in tc358764_configure_regulators()
427 				      ctx->supplies);  in tc358764_configure_regulators()
429 		dev_err(ctx->dev, "failed to get regulators: %d\n", ret);  in tc358764_configure_regulators()
434 static int tc358764_probe(struct mipi_dsi_device *dsi)  in tc358764_probe()  argument
436 	struct device *dev = &dsi->dev;  in tc358764_probe()
442 		return -ENOMEM;  in tc358764_probe()
444 	mipi_dsi_set_drvdata(dsi, ctx);  in tc358764_probe()
446 	ctx->dev = dev;  in tc358764_probe()
448 	dsi->lanes = 4;  in tc358764_probe()
449 	dsi->format = MIPI_DSI_FMT_RGB888;  in tc358764_probe()
450 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST  in tc358764_probe()
461 	ctx->bridge.funcs = &tc358764_bridge_funcs;  in tc358764_probe()
462 	ctx->bridge.of_node = dev->of_node;  in tc358764_probe()
464 	drm_bridge_add(&ctx->bridge);  in tc358764_probe()
466 	ret = mipi_dsi_attach(dsi);  in tc358764_probe()
468 		drm_bridge_remove(&ctx->bridge);  in tc358764_probe()
469 		dev_err(dev, "failed to attach dsi\n");  in tc358764_probe()
475 static int tc358764_remove(struct mipi_dsi_device *dsi)  in tc358764_remove()  argument
477 	struct tc358764 *ctx = mipi_dsi_get_drvdata(dsi);  in tc358764_remove()
479 	mipi_dsi_detach(dsi);  in tc358764_remove()
480 	drm_bridge_remove(&ctx->bridge);  in tc358764_remove()
504 MODULE_DESCRIPTION("MIPI-DSI based Driver for TC358764 DSI/LVDS Bridge");