Lines Matching +full:odd +full:- +full:numbered
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * DRM driver for Pervasive Displays RePaper branded e-ink panels
5 * Copyright 2013-2017 Pervasive Displays, Inc.
17 #include <linux/dma-buf.h>
50 enum repaper_stage { /* Image pixel -> Display pixel */
51 REPAPER_COMPENSATE, /* B -> W, W -> B (Current Image) */
52 REPAPER_WHITE, /* B -> N, W -> W (Current Image) */
53 REPAPER_INVERSE, /* B -> N, W -> B (New Image) */
54 REPAPER_NORMAL /* B -> B, W -> W (New Image) */
110 return -ENOMEM; in repaper_spi_transfer()
120 ret = -ENOMEM; in repaper_spi_transfer()
128 ret = -ENOMEM; in repaper_spi_transfer()
198 /* pixels on display are numbered from 1 so even is actually bits 1,3,5,... */
205 for (b = 0; b < (epd->width / 8); b++) { in repaper_even_pixels()
217 case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */ in repaper_even_pixels()
220 case REPAPER_WHITE: /* B -> N, W -> W (Current) */ in repaper_even_pixels()
223 case REPAPER_INVERSE: /* B -> N, W -> B (New) */ in repaper_even_pixels()
226 case REPAPER_NORMAL: /* B -> B, W -> W (New) */ in repaper_even_pixels()
244 /* pixels on display are numbered from 1 so odd is actually bits 0,2,4,... */
251 for (b = epd->width / 8; b > 0; b--) { in repaper_odd_pixels()
253 u8 pixels = data[b - 1] & 0x55; in repaper_odd_pixels()
257 pixel_mask = (mask[b - 1] ^ pixels) & 0x55; in repaper_odd_pixels()
262 case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */ in repaper_odd_pixels()
265 case REPAPER_WHITE: /* B -> N, W -> W (Current) */ in repaper_odd_pixels()
268 case REPAPER_INVERSE: /* B -> N, W -> B (New) */ in repaper_odd_pixels()
271 case REPAPER_NORMAL: /* B -> B, W -> W (New) */ in repaper_odd_pixels()
284 /* interleave bits: (byte)76543210 -> (16 bit).7.6.5.4.3.2.1 */
294 /* pixels on display are numbered from 1 */
301 for (b = epd->width / 8; b > 0; b--) { in repaper_all_pixels()
303 u16 pixels = repaper_interleave_bits(data[b - 1]); in repaper_all_pixels()
307 pixel_mask = repaper_interleave_bits(mask[b - 1]); in repaper_all_pixels()
314 case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */ in repaper_all_pixels()
317 case REPAPER_WHITE: /* B -> N, W -> W (Current) */ in repaper_all_pixels()
320 case REPAPER_INVERSE: /* B -> N, W -> B (New) */ in repaper_all_pixels()
323 case REPAPER_NORMAL: /* B -> B, W -> W (New) */ in repaper_all_pixels()
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()
356 for (b = epd->bytes_per_scan; b > 0; b--) { in repaper_one_line()
357 if (line / 4 == b - 1) in repaper_one_line()
367 * even scan line, but as lines on display are numbered from 1, in repaper_one_line()
370 for (b = 0; b < epd->bytes_per_scan; b++) { in repaper_one_line()
381 * odd scan line, but as lines on display are numbered from 1, in repaper_one_line()
384 for (b = epd->bytes_per_scan; b > 0; b--) { in repaper_one_line()
385 if (0 == (line & 0x01) && line / 8 == b - 1) 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()
428 for (line = 0; line < epd->height; line++) in repaper_frame_fixed()
438 for (line = 0; line < epd->height; 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()
457 u64 end = start + (epd->factored_stage_time * 1000 * 1000); in repaper_frame_fixed_repeat()
468 u64 end = start + (epd->factored_stage_time * 1000 * 1000); in repaper_frame_data_repeat()
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()
491 if (temperature <= -10) in repaper_get_temperature()
493 else if (temperature <= -5) in repaper_get_temperature()
508 epd->factored_stage_time = epd->stage_time * factor10x / 10; in repaper_get_temperature()
534 struct dma_buf_attachment *import_attach = cma_obj->base.import_attach; in repaper_fb_dirty()
535 struct repaper_epd *epd = drm_to_epd(fb->dev); in repaper_fb_dirty()
540 if (!drm_dev_enter(fb->dev, &idx)) in repaper_fb_dirty()
541 return -ENODEV; in repaper_fb_dirty()
545 clip.x2 = fb->width; in repaper_fb_dirty()
547 clip.y2 = fb->height; in repaper_fb_dirty()
551 DRM_DEBUG("Flushing [FB:%d] st=%ums\n", fb->base.id, in repaper_fb_dirty()
552 epd->factored_stage_time); in repaper_fb_dirty()
554 buf = kmalloc_array(fb->width, fb->height, GFP_KERNEL); in repaper_fb_dirty()
556 ret = -ENOMEM; in repaper_fb_dirty()
561 ret = dma_buf_begin_cpu_access(import_attach->dmabuf, in repaper_fb_dirty()
567 drm_fb_xrgb8888_to_gray8(buf, cma_obj->vaddr, fb, &clip); in repaper_fb_dirty()
570 ret = dma_buf_end_cpu_access(import_attach->dmabuf, in repaper_fb_dirty()
576 repaper_gray8_to_mono_reversed(buf, fb->width, fb->height); 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()
589 epd->partial = true; in repaper_fb_dirty()
591 /* Clear display (anything -> white) */ 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()
616 for (x = 0; x < (fb->width / 8); x++) in repaper_fb_dirty()
617 if (buf[x + (fb->width * (fb->height - 1) / 8)]) { in repaper_fb_dirty()
619 epd->current_frame, in repaper_fb_dirty()
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()
655 struct spi_device *spi = epd->spi; in repaper_pipe_enable()
656 struct device *dev = &spi->dev; in repaper_pipe_enable()
660 if (!drm_dev_enter(pipe->crtc.dev, &idx)) 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()
690 for (i = 100; i > 0; i--) { in repaper_pipe_enable()
691 if (!gpiod_get_value_cansleep(epd->busy)) in repaper_pipe_enable()
730 repaper_write_buf(spi, 0x01, epd->channel_select, 8); in repaper_pipe_enable()
747 /* Charge pump positive voltage on - VGH/VDL on */ in repaper_pipe_enable()
751 /* Charge pump negative voltage on - VGL/VDL on */ in repaper_pipe_enable()
755 /* Charge pump Vcom on - Vcom driver on */ 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()
793 struct spi_device *spi = epd->spi; in repaper_pipe_disable()
806 for (line = 0; line < epd->height; line++) in repaper_pipe_disable()
811 if (epd->border) { 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()
849 struct drm_plane_state *state = pipe->plane.state; in repaper_pipe_update()
852 if (!pipe->crtc.state->active) in repaper_pipe_update()
856 repaper_fb_dirty(state->fb); in repaper_pipe_update()
868 struct repaper_epd *epd = drm_to_epd(connector->dev); in repaper_connector_get_modes()
871 mode = drm_mode_duplicate(connector->dev, epd->mode); in repaper_connector_get_modes()
878 mode->type |= DRM_MODE_TYPE_PREFERRED; in repaper_connector_get_modes()
881 connector->display_info.width_mm = mode->width_mm; in repaper_connector_get_modes()
882 connector->display_info.height_mm = mode->height_mm; in repaper_connector_get_modes()
944 .desc = "Pervasive Displays RePaper e-ink panels",
972 struct device *dev = &spi->dev; in repaper_probe()
986 model = (enum repaper_model)spi_id->driver_data; in repaper_probe()
990 if (!dev->coherent_dma_mask) { in repaper_probe()
1003 drm = &epd->drm; in repaper_probe()
1008 drm->mode_config.funcs = &repaper_mode_config_funcs; 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()
1015 if (ret != -EPROBE_DEFER) in repaper_probe()
1016 DRM_DEV_ERROR(dev, "Failed to get gpio 'panel-on'\n"); 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()
1023 if (ret != -EPROBE_DEFER) 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()
1031 if (ret != -EPROBE_DEFER) 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()
1039 if (ret != -EPROBE_DEFER) in repaper_probe()
1044 if (!device_property_read_string(dev, "pervasive,thermal-zone", 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()
1088 if (ret != -EPROBE_DEFER) 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()
1103 return -ENODEV; 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()
1114 return -ENOMEM; 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()
1119 return -ENOMEM; in repaper_probe()
1121 drm->mode_config.min_width = mode->hdisplay; in repaper_probe()
1122 drm->mode_config.max_width = mode->hdisplay; in repaper_probe()
1123 drm->mode_config.min_height = mode->vdisplay; in repaper_probe()
1124 drm->mode_config.max_height = mode->vdisplay; 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()
1146 DRM_DEBUG_DRIVER("SPI speed: %uMHz\n", spi->max_speed_hz / 1000000); in repaper_probe()