118 static int ld9040_clear_error(struct ld9040 *ctx)  in ld9040_clear_error()  argument
120 	int ret = ctx->error;  in ld9040_clear_error()
122 	ctx->error = 0;  in ld9040_clear_error()
126 static int ld9040_spi_write_word(struct ld9040 *ctx, u16 data)  in ld9040_spi_write_word()  argument
128 	struct spi_device *spi = to_spi_device(ctx->dev);  in ld9040_spi_write_word()
141 static void ld9040_dcs_write(struct ld9040 *ctx, const u8 *data, size_t len)  in ld9040_dcs_write()  argument
145 	if (ctx->error < 0 || len == 0)  in ld9040_dcs_write()
148 	dev_dbg(ctx->dev, "writing dcs seq: %*ph\n", (int)len, data);  in ld9040_dcs_write()
149 	ret = ld9040_spi_write_word(ctx, *data);  in ld9040_dcs_write()
153 		ret = ld9040_spi_write_word(ctx, *data | 0x100);  in ld9040_dcs_write()
157 		dev_err(ctx->dev, "error %d writing dcs seq: %*ph\n", ret,  in ld9040_dcs_write()
159 		ctx->error = ret;  in ld9040_dcs_write()
165 #define ld9040_dcs_write_seq_static(ctx, seq...) \  argument
168 	ld9040_dcs_write(ctx, d, ARRAY_SIZE(d));\
171 static void ld9040_brightness_set(struct ld9040 *ctx)  in ld9040_brightness_set()  argument
173 	ld9040_dcs_write(ctx, ld9040_gammas[ctx->brightness],  in ld9040_brightness_set()
174 			 ARRAY_SIZE(ld9040_gammas[ctx->brightness]));  in ld9040_brightness_set()
176 	ld9040_dcs_write_seq_static(ctx, MCS_GAMMA_CTRL, 0x02, 0x5a);  in ld9040_brightness_set()
179 static void ld9040_init(struct ld9040 *ctx)  in ld9040_init()  argument
181 	ld9040_dcs_write_seq_static(ctx, MCS_USER_SETTING, 0x5a, 0x5a);  in ld9040_init()
182 	ld9040_dcs_write_seq_static(ctx, MCS_PANEL_CONDITION,  in ld9040_init()
186 	ld9040_dcs_write_seq_static(ctx, MCS_DISPCTL,  in ld9040_init()
188 	ld9040_dcs_write_seq_static(ctx, MCS_MANPWR, 0x04);  in ld9040_init()
189 	ld9040_dcs_write_seq_static(ctx, MCS_POWER_CTRL,  in ld9040_init()
191 	ld9040_dcs_write_seq_static(ctx, MCS_ELVSS_ON, 0x0d, 0x00, 0x16);  in ld9040_init()
192 	ld9040_dcs_write_seq_static(ctx, MCS_GTCON, 0x09, 0x00, 0x00);  in ld9040_init()
193 	ld9040_brightness_set(ctx);  in ld9040_init()
194 	ld9040_dcs_write_seq_static(ctx, MIPI_DCS_EXIT_SLEEP_MODE);  in ld9040_init()
195 	ld9040_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_ON);  in ld9040_init()
198 static int ld9040_power_on(struct ld9040 *ctx)  in ld9040_power_on()  argument
202 	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);  in ld9040_power_on()
206 	msleep(ctx->power_on_delay);  in ld9040_power_on()
207 	gpiod_set_value(ctx->reset_gpio, 0);  in ld9040_power_on()
208 	msleep(ctx->reset_delay);  in ld9040_power_on()
209 	gpiod_set_value(ctx->reset_gpio, 1);  in ld9040_power_on()
210 	msleep(ctx->reset_delay);  in ld9040_power_on()
215 static int ld9040_power_off(struct ld9040 *ctx)  in ld9040_power_off()  argument
217 	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);  in ld9040_power_off()
227 	struct ld9040 *ctx = panel_to_ld9040(panel);  in ld9040_unprepare()  local
230 	ld9040_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_OFF);  in ld9040_unprepare()
231 	ld9040_dcs_write_seq_static(ctx, MIPI_DCS_ENTER_SLEEP_MODE);  in ld9040_unprepare()
234 	ld9040_clear_error(ctx);  in ld9040_unprepare()
236 	return ld9040_power_off(ctx);  in ld9040_unprepare()
241 	struct ld9040 *ctx = panel_to_ld9040(panel);  in ld9040_prepare()  local
244 	ret = ld9040_power_on(ctx);  in ld9040_prepare()
248 	ld9040_init(ctx);  in ld9040_prepare()
250 	ret = ld9040_clear_error(ctx);  in ld9040_prepare()
266 	struct ld9040 *ctx = panel_to_ld9040(panel);  in ld9040_get_modes()  local
275 	drm_display_mode_from_videomode(&ctx->vm, mode);  in ld9040_get_modes()
276 	mode->width_mm = ctx->width_mm;  in ld9040_get_modes()
277 	mode->height_mm = ctx->height_mm;  in ld9040_get_modes()
295 static int ld9040_parse_dt(struct ld9040 *ctx)  in ld9040_parse_dt()  argument
297 	struct device *dev = ctx->dev;  in ld9040_parse_dt()
301 	ret = of_get_videomode(np, &ctx->vm, 0);  in ld9040_parse_dt()
305 	of_property_read_u32(np, "power-on-delay", &ctx->power_on_delay);  in ld9040_parse_dt()
306 	of_property_read_u32(np, "reset-delay", &ctx->reset_delay);  in ld9040_parse_dt()
307 	of_property_read_u32(np, "panel-width-mm", &ctx->width_mm);  in ld9040_parse_dt()
308 	of_property_read_u32(np, "panel-height-mm", &ctx->height_mm);  in ld9040_parse_dt()
316 	struct ld9040 *ctx;  in ld9040_probe()  local
319 	ctx = devm_kzalloc(dev, sizeof(struct ld9040), GFP_KERNEL);  in ld9040_probe()
320 	if (!ctx)  in ld9040_probe()
323 	spi_set_drvdata(spi, ctx);  in ld9040_probe()
325 	ctx->dev = dev;  in ld9040_probe()
326 	ctx->brightness = ARRAY_SIZE(ld9040_gammas) - 1;  in ld9040_probe()
328 	ret = ld9040_parse_dt(ctx);  in ld9040_probe()
332 	ctx->supplies[0].supply = "vdd3";  in ld9040_probe()
333 	ctx->supplies[1].supply = "vci";  in ld9040_probe()
334 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),  in ld9040_probe()
335 				      ctx->supplies);  in ld9040_probe()
339 	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in ld9040_probe()
340 	if (IS_ERR(ctx->reset_gpio)) {  in ld9040_probe()
342 			PTR_ERR(ctx->reset_gpio));  in ld9040_probe()
343 		return PTR_ERR(ctx->reset_gpio);  in ld9040_probe()
353 	drm_panel_init(&ctx->panel);  in ld9040_probe()
354 	ctx->panel.dev = dev;  in ld9040_probe()
355 	ctx->panel.funcs = &ld9040_drm_funcs;  in ld9040_probe()
357 	return drm_panel_add(&ctx->panel);  in ld9040_probe()
362 	struct ld9040 *ctx = spi_get_drvdata(spi);  in ld9040_remove()  local
364 	ld9040_power_off(ctx);  in ld9040_remove()
365 	drm_panel_remove(&ctx->panel);  in ld9040_remove()