199 static void repaper_even_pixels(struct repaper_epd *epd, u8 **pp,  in repaper_even_pixels()  argument
205 	for (b = 0; b < (epd->width / 8); b++) {  in repaper_even_pixels()
245 static void repaper_odd_pixels(struct repaper_epd *epd, u8 **pp,  in repaper_odd_pixels()  argument
251 	for (b = epd->width / 8; b > 0; b--) {  in repaper_odd_pixels()
295 static void repaper_all_pixels(struct repaper_epd *epd, u8 **pp,  in repaper_all_pixels()  argument
301 	for (b = epd->width / 8; b > 0; b--) {  in repaper_all_pixels()
339 static void repaper_one_line(struct repaper_epd *epd, unsigned int line,  in repaper_one_line()  argument
343 	u8 *p = epd->line_buffer;  in repaper_one_line()
346 	repaper_spi_mosi_low(epd->spi);  in repaper_one_line()
348 	if (epd->pre_border_byte)  in repaper_one_line()
351 	if (epd->middle_scan) {  in repaper_one_line()
353 		repaper_odd_pixels(epd, &p, data, fixed_value, mask, stage);  in repaper_one_line()
356 		for (b = epd->bytes_per_scan; b > 0; b--) {  in repaper_one_line()
364 		repaper_even_pixels(epd, &p, data, fixed_value, mask, stage);  in repaper_one_line()
370 		for (b = 0; b < epd->bytes_per_scan; b++) {  in repaper_one_line()
378 		repaper_all_pixels(epd, &p, data, fixed_value, mask, stage);  in repaper_one_line()
384 		for (b = epd->bytes_per_scan; b > 0; b--) {  in repaper_one_line()
392 	switch (epd->border_byte) {  in repaper_one_line()
414 	repaper_write_buf(epd->spi, 0x0a, epd->line_buffer,  in repaper_one_line()
415 			  p - epd->line_buffer);  in repaper_one_line()
418 	repaper_write_val(epd->spi, 0x02, 0x07);  in repaper_one_line()
420 	repaper_spi_mosi_low(epd->spi);  in repaper_one_line()
423 static void repaper_frame_fixed(struct repaper_epd *epd, u8 fixed_value,  in repaper_frame_fixed()  argument
428 	for (line = 0; line < epd->height; line++)  in repaper_frame_fixed()
429 		repaper_one_line(epd, line, NULL, fixed_value, NULL, stage);  in repaper_frame_fixed()
432 static void repaper_frame_data(struct repaper_epd *epd, const u8 *image,  in repaper_frame_data()  argument
438 		for (line = 0; line < epd->height; line++) {  in repaper_frame_data()
439 			repaper_one_line(epd, line,  in repaper_frame_data()
440 					 &image[line * (epd->width / 8)],  in repaper_frame_data()
444 		for (line = 0; line < epd->height; line++) {  in repaper_frame_data()
445 			size_t n = line * epd->width / 8;  in repaper_frame_data()
447 			repaper_one_line(epd, line, &image[n], 0, &mask[n],  in repaper_frame_data()
453 static void repaper_frame_fixed_repeat(struct repaper_epd *epd, u8 fixed_value,  in repaper_frame_fixed_repeat()  argument
457 	u64 end = start + (epd->factored_stage_time * 1000 * 1000);  in repaper_frame_fixed_repeat()
460 		repaper_frame_fixed(epd, fixed_value, stage);  in repaper_frame_fixed_repeat()
464 static void repaper_frame_data_repeat(struct repaper_epd *epd, const u8 *image,  in repaper_frame_data_repeat()  argument
468 	u64 end = start + (epd->factored_stage_time * 1000 * 1000);  in repaper_frame_data_repeat()
471 		repaper_frame_data(epd, image, mask, stage);  in repaper_frame_data_repeat()
475 static void repaper_get_temperature(struct repaper_epd *epd)  in repaper_get_temperature()  argument
480 	if (!epd->thermal)  in repaper_get_temperature()
483 	ret = thermal_zone_get_temp(epd->thermal, &temperature);  in repaper_get_temperature()
485 		DRM_DEV_ERROR(&epd->spi->dev, "Failed to get temperature (%d)\n", ret);  in repaper_get_temperature()
508 	epd->factored_stage_time = epd->stage_time * factor10x / 10;  in repaper_get_temperature()
535 	struct repaper_epd *epd = drm_to_epd(fb->dev);  in repaper_fb_dirty()  local
549 	repaper_get_temperature(epd);  in repaper_fb_dirty()
552 		  epd->factored_stage_time);  in repaper_fb_dirty()
578 	if (epd->partial) {  in repaper_fb_dirty()
579 		repaper_frame_data_repeat(epd, buf, epd->current_frame,  in repaper_fb_dirty()
581 	} else if (epd->cleared) {  in repaper_fb_dirty()
582 		repaper_frame_data_repeat(epd, epd->current_frame, NULL,  in repaper_fb_dirty()
584 		repaper_frame_data_repeat(epd, epd->current_frame, NULL,  in repaper_fb_dirty()
586 		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);  in repaper_fb_dirty()
587 		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);  in repaper_fb_dirty()
589 		epd->partial = true;  in repaper_fb_dirty()
592 		repaper_frame_fixed_repeat(epd, 0xff, REPAPER_COMPENSATE);  in repaper_fb_dirty()
593 		repaper_frame_fixed_repeat(epd, 0xff, REPAPER_WHITE);  in repaper_fb_dirty()
594 		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_INVERSE);  in repaper_fb_dirty()
595 		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_NORMAL);  in repaper_fb_dirty()
598 		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_COMPENSATE);  in repaper_fb_dirty()
599 		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_WHITE);  in repaper_fb_dirty()
600 		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);  in repaper_fb_dirty()
601 		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);  in repaper_fb_dirty()
603 		epd->cleared = true;  in repaper_fb_dirty()
604 		epd->partial = true;  in repaper_fb_dirty()
607 	memcpy(epd->current_frame, buf, fb->width * fb->height / 8);  in repaper_fb_dirty()
613 	if (epd->pre_border_byte) {  in repaper_fb_dirty()
618 				repaper_frame_data_repeat(epd, buf,  in repaper_fb_dirty()
619 							  epd->current_frame,  in repaper_fb_dirty()
633 static void power_off(struct repaper_epd *epd)  in power_off()  argument
636 	gpiod_set_value_cansleep(epd->reset, 0);  in power_off()
637 	gpiod_set_value_cansleep(epd->panel_on, 0);  in power_off()
638 	if (epd->border)  in power_off()
639 		gpiod_set_value_cansleep(epd->border, 0);  in power_off()
642 	repaper_spi_mosi_low(epd->spi);  in power_off()
645 	gpiod_set_value_cansleep(epd->discharge, 1);  in power_off()
647 	gpiod_set_value_cansleep(epd->discharge, 0);  in power_off()
654 	struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev);  in repaper_pipe_enable()  local
655 	struct spi_device *spi = epd->spi;  in repaper_pipe_enable()
666 	gpiod_set_value_cansleep(epd->reset, 0);  in repaper_pipe_enable()
667 	gpiod_set_value_cansleep(epd->panel_on, 0);  in repaper_pipe_enable()
668 	gpiod_set_value_cansleep(epd->discharge, 0);  in repaper_pipe_enable()
669 	if (epd->border)  in repaper_pipe_enable()
670 		gpiod_set_value_cansleep(epd->border, 0);  in repaper_pipe_enable()
674 	gpiod_set_value_cansleep(epd->panel_on, 1);  in repaper_pipe_enable()
680 	gpiod_set_value_cansleep(epd->reset, 1);  in repaper_pipe_enable()
681 	if (epd->border)  in repaper_pipe_enable()
682 		gpiod_set_value_cansleep(epd->border, 1);  in repaper_pipe_enable()
684 	gpiod_set_value_cansleep(epd->reset, 0);  in repaper_pipe_enable()
686 	gpiod_set_value_cansleep(epd->reset, 1);  in repaper_pipe_enable()
691 		if (!gpiod_get_value_cansleep(epd->busy))  in repaper_pipe_enable()
699 		power_off(epd);  in repaper_pipe_enable()
710 		power_off(epd);  in repaper_pipe_enable()
723 		power_off(epd);  in repaper_pipe_enable()
730 	repaper_write_buf(spi, 0x01, epd->channel_select, 8);  in repaper_pipe_enable()
763 			power_off(epd);  in repaper_pipe_enable()
775 		power_off(epd);  in repaper_pipe_enable()
785 	epd->partial = false;  in repaper_pipe_enable()
792 	struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev);  in repaper_pipe_disable()  local
793 	struct spi_device *spi = epd->spi;  in repaper_pipe_disable()
806 	for (line = 0; line < epd->height; line++)  in repaper_pipe_disable()
807 		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,  in repaper_pipe_disable()
811 	if (epd->border) {  in repaper_pipe_disable()
813 		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,  in repaper_pipe_disable()
816 		gpiod_set_value_cansleep(epd->border, 0);  in repaper_pipe_disable()
818 		gpiod_set_value_cansleep(epd->border, 1);  in repaper_pipe_disable()
821 		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,  in repaper_pipe_disable()
843 	power_off(epd);  in repaper_pipe_disable()
868 	struct repaper_epd *epd = drm_to_epd(connector->dev);  in repaper_connector_get_modes()  local
871 	mode = drm_mode_duplicate(connector->dev, epd->mode);  in repaper_connector_get_modes()
975 	struct repaper_epd *epd;  in repaper_probe()  local
998 	epd = devm_drm_dev_alloc(dev, &repaper_driver,  in repaper_probe()
1000 	if (IS_ERR(epd))  in repaper_probe()
1001 		return PTR_ERR(epd);  in repaper_probe()
1003 	drm = &epd->drm;  in repaper_probe()
1010 	epd->spi = spi;  in repaper_probe()
1012 	epd->panel_on = devm_gpiod_get(dev, "panel-on", GPIOD_OUT_LOW);  in repaper_probe()
1013 	if (IS_ERR(epd->panel_on)) {  in repaper_probe()
1014 		ret = PTR_ERR(epd->panel_on);  in repaper_probe()
1020 	epd->discharge = devm_gpiod_get(dev, "discharge", GPIOD_OUT_LOW);  in repaper_probe()
1021 	if (IS_ERR(epd->discharge)) {  in repaper_probe()
1022 		ret = PTR_ERR(epd->discharge);  in repaper_probe()
1028 	epd->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);  in repaper_probe()
1029 	if (IS_ERR(epd->reset)) {  in repaper_probe()
1030 		ret = PTR_ERR(epd->reset);  in repaper_probe()
1036 	epd->busy = devm_gpiod_get(dev, "busy", GPIOD_IN);  in repaper_probe()
1037 	if (IS_ERR(epd->busy)) {  in repaper_probe()
1038 		ret = PTR_ERR(epd->busy);  in repaper_probe()
1046 		epd->thermal = thermal_zone_get_zone_by_name(thermal_zone);  in repaper_probe()
1047 		if (IS_ERR(epd->thermal)) {  in repaper_probe()
1049 			return PTR_ERR(epd->thermal);  in repaper_probe()
1056 		epd->channel_select = repaper_e1144cs021_cs;  in repaper_probe()
1057 		epd->stage_time = 480;  in repaper_probe()
1058 		epd->bytes_per_scan = 96 / 4;  in repaper_probe()
1059 		epd->middle_scan = true; /* data-scan-data */  in repaper_probe()
1060 		epd->pre_border_byte = false;  in repaper_probe()
1061 		epd->border_byte = REPAPER_BORDER_BYTE_ZERO;  in repaper_probe()
1066 		epd->channel_select = repaper_e1190cs021_cs;  in repaper_probe()
1067 		epd->stage_time = 480;  in repaper_probe()
1068 		epd->bytes_per_scan = 128 / 4 / 2;  in repaper_probe()
1069 		epd->middle_scan = false; /* scan-data-scan */  in repaper_probe()
1070 		epd->pre_border_byte = false;  in repaper_probe()
1071 		epd->border_byte = REPAPER_BORDER_BYTE_SET;  in repaper_probe()
1076 		epd->channel_select = repaper_e2200cs021_cs;  in repaper_probe()
1077 		epd->stage_time = 480;  in repaper_probe()
1078 		epd->bytes_per_scan = 96 / 4;  in repaper_probe()
1079 		epd->middle_scan = true; /* data-scan-data */  in repaper_probe()
1080 		epd->pre_border_byte = true;  in repaper_probe()
1081 		epd->border_byte = REPAPER_BORDER_BYTE_NONE;  in repaper_probe()
1085 		epd->border = devm_gpiod_get(dev, "border", GPIOD_OUT_LOW);  in repaper_probe()
1086 		if (IS_ERR(epd->border)) {  in repaper_probe()
1087 			ret = PTR_ERR(epd->border);  in repaper_probe()
1094 		epd->channel_select = repaper_e2271cs021_cs;  in repaper_probe()
1095 		epd->stage_time = 630;  in repaper_probe()
1096 		epd->bytes_per_scan = 176 / 4;  in repaper_probe()
1097 		epd->middle_scan = true; /* data-scan-data */  in repaper_probe()
1098 		epd->pre_border_byte = true;  in repaper_probe()
1099 		epd->border_byte = REPAPER_BORDER_BYTE_NONE;  in repaper_probe()
1106 	epd->mode = mode;  in repaper_probe()
1107 	epd->width = mode->hdisplay;  in repaper_probe()
1108 	epd->height = mode->vdisplay;  in repaper_probe()
1109 	epd->factored_stage_time = epd->stage_time;  in repaper_probe()
1111 	line_buffer_size = 2 * epd->width / 8 + epd->bytes_per_scan + 2;  in repaper_probe()
1112 	epd->line_buffer = devm_kzalloc(dev, line_buffer_size, GFP_KERNEL);  in repaper_probe()
1113 	if (!epd->line_buffer)  in repaper_probe()
1116 	epd->current_frame = devm_kzalloc(dev, epd->width * epd->height / 8,  in repaper_probe()
1118 	if (!epd->current_frame)  in repaper_probe()
1126 	drm_connector_helper_add(&epd->connector, &repaper_connector_hfuncs);  in repaper_probe()
1127 	ret = drm_connector_init(drm, &epd->connector, &repaper_connector_funcs,  in repaper_probe()
1132 	ret = drm_simple_display_pipe_init(drm, &epd->pipe, &repaper_pipe_funcs,  in repaper_probe()
1134 					   NULL, &epd->connector);  in repaper_probe()