191 static void repaper_even_pixels(struct repaper_epd *epd, u8 **pp,  in repaper_even_pixels()  argument
197 	for (b = 0; b < (epd->width / 8); b++) {  in repaper_even_pixels()
237 static void repaper_odd_pixels(struct repaper_epd *epd, u8 **pp,  in repaper_odd_pixels()  argument
243 	for (b = epd->width / 8; b > 0; b--) {  in repaper_odd_pixels()
287 static void repaper_all_pixels(struct repaper_epd *epd, u8 **pp,  in repaper_all_pixels()  argument
293 	for (b = epd->width / 8; b > 0; b--) {  in repaper_all_pixels()
331 static void repaper_one_line(struct repaper_epd *epd, unsigned int line,  in repaper_one_line()  argument
335 	u8 *p = epd->line_buffer;  in repaper_one_line()
338 	repaper_spi_mosi_low(epd->spi);  in repaper_one_line()
340 	if (epd->pre_border_byte)  in repaper_one_line()
343 	if (epd->middle_scan) {  in repaper_one_line()
345 		repaper_odd_pixels(epd, &p, data, fixed_value, mask, stage);  in repaper_one_line()
348 		for (b = epd->bytes_per_scan; b > 0; b--) {  in repaper_one_line()
356 		repaper_even_pixels(epd, &p, data, fixed_value, mask, stage);  in repaper_one_line()
362 		for (b = 0; b < epd->bytes_per_scan; b++) {  in repaper_one_line()
370 		repaper_all_pixels(epd, &p, data, fixed_value, mask, stage);  in repaper_one_line()
376 		for (b = epd->bytes_per_scan; b > 0; b--) {  in repaper_one_line()
384 	switch (epd->border_byte) {  in repaper_one_line()
406 	repaper_write_buf(epd->spi, 0x0a, epd->line_buffer,  in repaper_one_line()
407 			  p - epd->line_buffer);  in repaper_one_line()
410 	repaper_write_val(epd->spi, 0x02, 0x07);  in repaper_one_line()
412 	repaper_spi_mosi_low(epd->spi);  in repaper_one_line()
415 static void repaper_frame_fixed(struct repaper_epd *epd, u8 fixed_value,  in repaper_frame_fixed()  argument
420 	for (line = 0; line < epd->height; line++)  in repaper_frame_fixed()
421 		repaper_one_line(epd, line, NULL, fixed_value, NULL, stage);  in repaper_frame_fixed()
424 static void repaper_frame_data(struct repaper_epd *epd, const u8 *image,  in repaper_frame_data()  argument
430 		for (line = 0; line < epd->height; line++) {  in repaper_frame_data()
431 			repaper_one_line(epd, line,  in repaper_frame_data()
432 					 &image[line * (epd->width / 8)],  in repaper_frame_data()
436 		for (line = 0; line < epd->height; line++) {  in repaper_frame_data()
437 			size_t n = line * epd->width / 8;  in repaper_frame_data()
439 			repaper_one_line(epd, line, &image[n], 0, &mask[n],  in repaper_frame_data()
445 static void repaper_frame_fixed_repeat(struct repaper_epd *epd, u8 fixed_value,  in repaper_frame_fixed_repeat()  argument
449 	u64 end = start + (epd->factored_stage_time * 1000 * 1000);  in repaper_frame_fixed_repeat()
452 		repaper_frame_fixed(epd, fixed_value, stage);  in repaper_frame_fixed_repeat()
456 static void repaper_frame_data_repeat(struct repaper_epd *epd, const u8 *image,  in repaper_frame_data_repeat()  argument
460 	u64 end = start + (epd->factored_stage_time * 1000 * 1000);  in repaper_frame_data_repeat()
463 		repaper_frame_data(epd, image, mask, stage);  in repaper_frame_data_repeat()
467 static void repaper_get_temperature(struct repaper_epd *epd)  in repaper_get_temperature()  argument
472 	if (!epd->thermal)  in repaper_get_temperature()
475 	ret = thermal_zone_get_temp(epd->thermal, &temperature);  in repaper_get_temperature()
477 		DRM_DEV_ERROR(&epd->spi->dev, "Failed to get temperature (%d)\n", ret);  in repaper_get_temperature()
500 	epd->factored_stage_time = epd->stage_time * factor10x / 10;  in repaper_get_temperature()
532 	struct repaper_epd *epd = epd_from_tinydrm(tdev);  in repaper_fb_dirty()  local
543 	if (!epd->enabled)  in repaper_fb_dirty()
546 	repaper_get_temperature(epd);  in repaper_fb_dirty()
549 		  epd->factored_stage_time);  in repaper_fb_dirty()
573 	if (epd->partial) {  in repaper_fb_dirty()
574 		repaper_frame_data_repeat(epd, buf, epd->current_frame,  in repaper_fb_dirty()
576 	} else if (epd->cleared) {  in repaper_fb_dirty()
577 		repaper_frame_data_repeat(epd, epd->current_frame, NULL,  in repaper_fb_dirty()
579 		repaper_frame_data_repeat(epd, epd->current_frame, NULL,  in repaper_fb_dirty()
581 		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);  in repaper_fb_dirty()
582 		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);  in repaper_fb_dirty()
584 		epd->partial = true;  in repaper_fb_dirty()
587 		repaper_frame_fixed_repeat(epd, 0xff, REPAPER_COMPENSATE);  in repaper_fb_dirty()
588 		repaper_frame_fixed_repeat(epd, 0xff, REPAPER_WHITE);  in repaper_fb_dirty()
589 		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_INVERSE);  in repaper_fb_dirty()
590 		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_NORMAL);  in repaper_fb_dirty()
593 		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_COMPENSATE);  in repaper_fb_dirty()
594 		repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_WHITE);  in repaper_fb_dirty()
595 		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE);  in repaper_fb_dirty()
596 		repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL);  in repaper_fb_dirty()
598 		epd->cleared = true;  in repaper_fb_dirty()
599 		epd->partial = true;  in repaper_fb_dirty()
602 	memcpy(epd->current_frame, buf, fb->width * fb->height / 8);  in repaper_fb_dirty()
608 	if (epd->pre_border_byte) {  in repaper_fb_dirty()
613 				repaper_frame_data_repeat(epd, buf,  in repaper_fb_dirty()
614 							  epd->current_frame,  in repaper_fb_dirty()
632 static void power_off(struct repaper_epd *epd)  in power_off()  argument
635 	gpiod_set_value_cansleep(epd->reset, 0);  in power_off()
636 	gpiod_set_value_cansleep(epd->panel_on, 0);  in power_off()
637 	if (epd->border)  in power_off()
638 		gpiod_set_value_cansleep(epd->border, 0);  in power_off()
641 	repaper_spi_mosi_low(epd->spi);  in power_off()
644 	gpiod_set_value_cansleep(epd->discharge, 1);  in power_off()
646 	gpiod_set_value_cansleep(epd->discharge, 0);  in power_off()
654 	struct repaper_epd *epd = epd_from_tinydrm(tdev);  in repaper_pipe_enable()  local
655 	struct spi_device *spi = epd->spi;  in repaper_pipe_enable()
663 	gpiod_set_value_cansleep(epd->reset, 0);  in repaper_pipe_enable()
664 	gpiod_set_value_cansleep(epd->panel_on, 0);  in repaper_pipe_enable()
665 	gpiod_set_value_cansleep(epd->discharge, 0);  in repaper_pipe_enable()
666 	if (epd->border)  in repaper_pipe_enable()
667 		gpiod_set_value_cansleep(epd->border, 0);  in repaper_pipe_enable()
671 	gpiod_set_value_cansleep(epd->panel_on, 1);  in repaper_pipe_enable()
677 	gpiod_set_value_cansleep(epd->reset, 1);  in repaper_pipe_enable()
678 	if (epd->border)  in repaper_pipe_enable()
679 		gpiod_set_value_cansleep(epd->border, 1);  in repaper_pipe_enable()
681 	gpiod_set_value_cansleep(epd->reset, 0);  in repaper_pipe_enable()
683 	gpiod_set_value_cansleep(epd->reset, 1);  in repaper_pipe_enable()
688 		if (!gpiod_get_value_cansleep(epd->busy))  in repaper_pipe_enable()
696 		power_off(epd);  in repaper_pipe_enable()
707 		power_off(epd);  in repaper_pipe_enable()
720 		power_off(epd);  in repaper_pipe_enable()
727 	repaper_write_buf(spi, 0x01, epd->channel_select, 8);  in repaper_pipe_enable()
760 			power_off(epd);  in repaper_pipe_enable()
772 		power_off(epd);  in repaper_pipe_enable()
782 	epd->enabled = true;  in repaper_pipe_enable()
783 	epd->partial = false;  in repaper_pipe_enable()
789 	struct repaper_epd *epd = epd_from_tinydrm(tdev);  in repaper_pipe_disable()  local
790 	struct spi_device *spi = epd->spi;  in repaper_pipe_disable()
796 	epd->enabled = false;  in repaper_pipe_disable()
800 	for (line = 0; line < epd->height; line++)  in repaper_pipe_disable()
801 		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,  in repaper_pipe_disable()
805 	if (epd->border) {  in repaper_pipe_disable()
807 		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,  in repaper_pipe_disable()
810 		gpiod_set_value_cansleep(epd->border, 0);  in repaper_pipe_disable()
812 		gpiod_set_value_cansleep(epd->border, 1);  in repaper_pipe_disable()
815 		repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL,  in repaper_pipe_disable()
837 	power_off(epd);  in repaper_pipe_disable()
920 	struct repaper_epd *epd;  in repaper_probe()  local
941 	epd = devm_kzalloc(dev, sizeof(*epd), GFP_KERNEL);  in repaper_probe()
942 	if (!epd)  in repaper_probe()
945 	epd->spi = spi;  in repaper_probe()
947 	epd->panel_on = devm_gpiod_get(dev, "panel-on", GPIOD_OUT_LOW);  in repaper_probe()
948 	if (IS_ERR(epd->panel_on)) {  in repaper_probe()
949 		ret = PTR_ERR(epd->panel_on);  in repaper_probe()
955 	epd->discharge = devm_gpiod_get(dev, "discharge", GPIOD_OUT_LOW);  in repaper_probe()
956 	if (IS_ERR(epd->discharge)) {  in repaper_probe()
957 		ret = PTR_ERR(epd->discharge);  in repaper_probe()
963 	epd->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);  in repaper_probe()
964 	if (IS_ERR(epd->reset)) {  in repaper_probe()
965 		ret = PTR_ERR(epd->reset);  in repaper_probe()
971 	epd->busy = devm_gpiod_get(dev, "busy", GPIOD_IN);  in repaper_probe()
972 	if (IS_ERR(epd->busy)) {  in repaper_probe()
973 		ret = PTR_ERR(epd->busy);  in repaper_probe()
981 		epd->thermal = thermal_zone_get_zone_by_name(thermal_zone);  in repaper_probe()
982 		if (IS_ERR(epd->thermal)) {  in repaper_probe()
984 			return PTR_ERR(epd->thermal);  in repaper_probe()
991 		epd->channel_select = repaper_e1144cs021_cs;  in repaper_probe()
992 		epd->stage_time = 480;  in repaper_probe()
993 		epd->bytes_per_scan = 96 / 4;  in repaper_probe()
994 		epd->middle_scan = true; /* data-scan-data */  in repaper_probe()
995 		epd->pre_border_byte = false;  in repaper_probe()
996 		epd->border_byte = REPAPER_BORDER_BYTE_ZERO;  in repaper_probe()
1001 		epd->channel_select = repaper_e1190cs021_cs;  in repaper_probe()
1002 		epd->stage_time = 480;  in repaper_probe()
1003 		epd->bytes_per_scan = 128 / 4 / 2;  in repaper_probe()
1004 		epd->middle_scan = false; /* scan-data-scan */  in repaper_probe()
1005 		epd->pre_border_byte = false;  in repaper_probe()
1006 		epd->border_byte = REPAPER_BORDER_BYTE_SET;  in repaper_probe()
1011 		epd->channel_select = repaper_e2200cs021_cs;  in repaper_probe()
1012 		epd->stage_time = 480;  in repaper_probe()
1013 		epd->bytes_per_scan = 96 / 4;  in repaper_probe()
1014 		epd->middle_scan = true; /* data-scan-data */  in repaper_probe()
1015 		epd->pre_border_byte = true;  in repaper_probe()
1016 		epd->border_byte = REPAPER_BORDER_BYTE_NONE;  in repaper_probe()
1020 		epd->border = devm_gpiod_get(dev, "border", GPIOD_OUT_LOW);  in repaper_probe()
1021 		if (IS_ERR(epd->border)) {  in repaper_probe()
1022 			ret = PTR_ERR(epd->border);  in repaper_probe()
1029 		epd->channel_select = repaper_e2271cs021_cs;  in repaper_probe()
1030 		epd->stage_time = 630;  in repaper_probe()
1031 		epd->bytes_per_scan = 176 / 4;  in repaper_probe()
1032 		epd->middle_scan = true; /* data-scan-data */  in repaper_probe()
1033 		epd->pre_border_byte = true;  in repaper_probe()
1034 		epd->border_byte = REPAPER_BORDER_BYTE_NONE;  in repaper_probe()
1041 	epd->width = mode->hdisplay;  in repaper_probe()
1042 	epd->height = mode->vdisplay;  in repaper_probe()
1043 	epd->factored_stage_time = epd->stage_time;  in repaper_probe()
1045 	line_buffer_size = 2 * epd->width / 8 + epd->bytes_per_scan + 2;  in repaper_probe()
1046 	epd->line_buffer = devm_kzalloc(dev, line_buffer_size, GFP_KERNEL);  in repaper_probe()
1047 	if (!epd->line_buffer)  in repaper_probe()
1050 	epd->current_frame = devm_kzalloc(dev, epd->width * epd->height / 8,  in repaper_probe()
1052 	if (!epd->current_frame)  in repaper_probe()
1055 	tdev = &epd->tinydrm;  in repaper_probe()