drm/bridge/tc358762.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2020 Marek Vasut <marex@denx.de>
35 #define PPI_D0S_CLRSIPOCOUNT	0x0164 /* Assertion timer for Lane 0 */
36 #define PPI_D1S_CLRSIPOCOUNT	0x0168 /* Assertion timer for Lane 1 */
40 #define DSI_STARTDSI		0x0204 /* START control bit of DSI-TX */
52 #define LCDCTRL_DEPOL		BIT(18) /* Polarity of DE signal */
84 	int ret = ctx->error;  in tc358762_clear_error()
86 	ctx->error = 0;  in tc358762_clear_error()
92 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in tc358762_write()
96 	if (ctx->error)  in tc358762_write()
108 		ctx->error = ret;  in tc358762_write()
133 	if (ctx->mode.flags & DRM_MODE_FLAG_NHSYNC)  in tc358762_init()
136 	if (ctx->mode.flags & DRM_MODE_FLAG_NVSYNC)  in tc358762_init()
162 	if (!ctx->pre_enabled)  in tc358762_post_disable()
165 	ctx->pre_enabled = false;  in tc358762_post_disable()
167 	if (ctx->reset_gpio)  in tc358762_post_disable()
168 		gpiod_set_value_cansleep(ctx->reset_gpio, 0);  in tc358762_post_disable()
170 	ret = regulator_disable(ctx->regulator);  in tc358762_post_disable()
172 		dev_err(ctx->dev, "error disabling regulators (%d)\n", ret);  in tc358762_post_disable()
181 	ret = regulator_enable(ctx->regulator);  in tc358762_pre_enable()
183 		dev_err(ctx->dev, "error enabling regulators (%d)\n", ret);  in tc358762_pre_enable()
185 	if (ctx->reset_gpio) {  in tc358762_pre_enable()
186 		gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in tc358762_pre_enable()
190 	ctx->pre_enabled = true;  in tc358762_pre_enable()
201 		dev_err(ctx->dev, "error initializing bridge (%d)\n", ret);  in tc358762_enable()
209 	return drm_bridge_attach(bridge->encoder, ctx->panel_bridge,  in tc358762_attach()
219 	drm_mode_copy(&ctx->mode, mode);  in tc358762_bridge_mode_set()
236 	struct device *dev = ctx->dev;  in tc358762_parse_dt()
238 	panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);  in tc358762_parse_dt()
242 	ctx->panel_bridge = panel_bridge;  in tc358762_parse_dt()
245 	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in tc358762_parse_dt()
246 	if (IS_ERR(ctx->reset_gpio))  in tc358762_parse_dt()
247 		return PTR_ERR(ctx->reset_gpio);  in tc358762_parse_dt()
254 	ctx->regulator = devm_regulator_get(ctx->dev, "vddc");  in tc358762_configure_regulators()
255 	if (IS_ERR(ctx->regulator))  in tc358762_configure_regulators()
256 		return PTR_ERR(ctx->regulator);  in tc358762_configure_regulators()
263 	struct device *dev = &dsi->dev;  in tc358762_probe()
269 		return -ENOMEM;  in tc358762_probe()
273 	ctx->dev = dev;  in tc358762_probe()
274 	ctx->pre_enabled = false;  in tc358762_probe()
276 	/* TODO: Find out how to get dual-lane mode working */  in tc358762_probe()
277 	dsi->lanes = 1;  in tc358762_probe()
278 	dsi->format = MIPI_DSI_FMT_RGB888;  in tc358762_probe()
279 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |  in tc358762_probe()
290 	ctx->bridge.funcs = &tc358762_bridge_funcs;  in tc358762_probe()
291 	ctx->bridge.type = DRM_MODE_CONNECTOR_DPI;  in tc358762_probe()
292 	ctx->bridge.of_node = dev->of_node;  in tc358762_probe()
293 	ctx->bridge.pre_enable_prev_first = true;  in tc358762_probe()
295 	drm_bridge_add(&ctx->bridge);  in tc358762_probe()
299 		drm_bridge_remove(&ctx->bridge);  in tc358762_probe()
311 	drm_bridge_remove(&ctx->bridge);  in tc358762_remove()
330 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
331 MODULE_DESCRIPTION("MIPI-DSI based Driver for TC358762 DSI/DPI Bridge");