1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
29ef7e25fSThierry Reding /*
39ef7e25fSThierry Reding * ld9040 AMOLED LCD drm_panel driver.
49ef7e25fSThierry Reding *
59ef7e25fSThierry Reding * Copyright (c) 2014 Samsung Electronics Co., Ltd
69ef7e25fSThierry Reding * Derived from drivers/video/backlight/ld9040.c
79ef7e25fSThierry Reding *
89ef7e25fSThierry Reding * Andrzej Hajda <a.hajda@samsung.com>
99ef7e25fSThierry Reding */
109ef7e25fSThierry Reding
11*c2268daaSPaul Cercueil #include <linux/backlight.h>
12cb23eae3SSam Ravnborg #include <linux/delay.h>
139ef7e25fSThierry Reding #include <linux/gpio/consumer.h>
14cb23eae3SSam Ravnborg #include <linux/module.h>
15cb23eae3SSam Ravnborg #include <linux/of.h>
169ef7e25fSThierry Reding #include <linux/regulator/consumer.h>
179ef7e25fSThierry Reding #include <linux/spi/spi.h>
189ef7e25fSThierry Reding
199ef7e25fSThierry Reding #include <video/mipi_display.h>
209ef7e25fSThierry Reding #include <video/of_videomode.h>
219ef7e25fSThierry Reding #include <video/videomode.h>
229ef7e25fSThierry Reding
23cb23eae3SSam Ravnborg #include <drm/drm_modes.h>
24cb23eae3SSam Ravnborg #include <drm/drm_panel.h>
25cb23eae3SSam Ravnborg
269ef7e25fSThierry Reding /* Manufacturer Command Set */
279ef7e25fSThierry Reding #define MCS_MANPWR 0xb0
289ef7e25fSThierry Reding #define MCS_ELVSS_ON 0xb1
299ef7e25fSThierry Reding #define MCS_USER_SETTING 0xf0
309ef7e25fSThierry Reding #define MCS_DISPCTL 0xf2
319ef7e25fSThierry Reding #define MCS_POWER_CTRL 0xf4
329ef7e25fSThierry Reding #define MCS_GTCON 0xf7
339ef7e25fSThierry Reding #define MCS_PANEL_CONDITION 0xf8
349ef7e25fSThierry Reding #define MCS_GAMMA_SET1 0xf9
359ef7e25fSThierry Reding #define MCS_GAMMA_CTRL 0xfb
369ef7e25fSThierry Reding
379ef7e25fSThierry Reding /* array of gamma tables for gamma value 2.2 */
389ef7e25fSThierry Reding static u8 const ld9040_gammas[25][22] = {
399ef7e25fSThierry Reding { 0xf9, 0x00, 0x13, 0xb2, 0xba, 0xd2, 0x00, 0x30, 0x00, 0xaf, 0xc0,
409ef7e25fSThierry Reding 0xb8, 0xcd, 0x00, 0x3d, 0x00, 0xa8, 0xb8, 0xb7, 0xcd, 0x00, 0x44 },
419ef7e25fSThierry Reding { 0xf9, 0x00, 0x13, 0xb9, 0xb9, 0xd0, 0x00, 0x3c, 0x00, 0xaf, 0xbf,
429ef7e25fSThierry Reding 0xb6, 0xcb, 0x00, 0x4b, 0x00, 0xa8, 0xb9, 0xb5, 0xcc, 0x00, 0x52 },
439ef7e25fSThierry Reding { 0xf9, 0x00, 0x13, 0xba, 0xb9, 0xcd, 0x00, 0x41, 0x00, 0xb0, 0xbe,
449ef7e25fSThierry Reding 0xb5, 0xc9, 0x00, 0x51, 0x00, 0xa9, 0xb9, 0xb5, 0xca, 0x00, 0x57 },
459ef7e25fSThierry Reding { 0xf9, 0x00, 0x13, 0xb9, 0xb8, 0xcd, 0x00, 0x46, 0x00, 0xb1, 0xbc,
469ef7e25fSThierry Reding 0xb5, 0xc8, 0x00, 0x56, 0x00, 0xaa, 0xb8, 0xb4, 0xc9, 0x00, 0x5d },
479ef7e25fSThierry Reding { 0xf9, 0x00, 0x13, 0xba, 0xb8, 0xcb, 0x00, 0x4b, 0x00, 0xb3, 0xbc,
489ef7e25fSThierry Reding 0xb4, 0xc7, 0x00, 0x5c, 0x00, 0xac, 0xb8, 0xb4, 0xc8, 0x00, 0x62 },
499ef7e25fSThierry Reding { 0xf9, 0x00, 0x13, 0xbb, 0xb7, 0xca, 0x00, 0x4f, 0x00, 0xb4, 0xbb,
509ef7e25fSThierry Reding 0xb3, 0xc7, 0x00, 0x60, 0x00, 0xad, 0xb8, 0xb4, 0xc7, 0x00, 0x67 },
519ef7e25fSThierry Reding { 0xf9, 0x00, 0x47, 0xba, 0xb6, 0xca, 0x00, 0x53, 0x00, 0xb5, 0xbb,
529ef7e25fSThierry Reding 0xb3, 0xc6, 0x00, 0x65, 0x00, 0xae, 0xb8, 0xb3, 0xc7, 0x00, 0x6c },
539ef7e25fSThierry Reding { 0xf9, 0x00, 0x71, 0xbb, 0xb5, 0xc8, 0x00, 0x57, 0x00, 0xb5, 0xbb,
549ef7e25fSThierry Reding 0xb0, 0xc5, 0x00, 0x6a, 0x00, 0xae, 0xb9, 0xb1, 0xc6, 0x00, 0x70 },
559ef7e25fSThierry Reding { 0xf9, 0x00, 0x7b, 0xbb, 0xb4, 0xc8, 0x00, 0x5b, 0x00, 0xb5, 0xba,
569ef7e25fSThierry Reding 0xb1, 0xc4, 0x00, 0x6e, 0x00, 0xae, 0xb9, 0xb0, 0xc5, 0x00, 0x75 },
579ef7e25fSThierry Reding { 0xf9, 0x00, 0x82, 0xba, 0xb4, 0xc7, 0x00, 0x5f, 0x00, 0xb5, 0xba,
589ef7e25fSThierry Reding 0xb0, 0xc3, 0x00, 0x72, 0x00, 0xae, 0xb8, 0xb0, 0xc3, 0x00, 0x7a },
599ef7e25fSThierry Reding { 0xf9, 0x00, 0x89, 0xba, 0xb3, 0xc8, 0x00, 0x62, 0x00, 0xb6, 0xba,
609ef7e25fSThierry Reding 0xaf, 0xc3, 0x00, 0x76, 0x00, 0xaf, 0xb7, 0xae, 0xc4, 0x00, 0x7e },
619ef7e25fSThierry Reding { 0xf9, 0x00, 0x8b, 0xb9, 0xb3, 0xc7, 0x00, 0x65, 0x00, 0xb7, 0xb8,
629ef7e25fSThierry Reding 0xaf, 0xc3, 0x00, 0x7a, 0x00, 0x80, 0xb6, 0xae, 0xc4, 0x00, 0x81 },
639ef7e25fSThierry Reding { 0xf9, 0x00, 0x93, 0xba, 0xb3, 0xc5, 0x00, 0x69, 0x00, 0xb8, 0xb9,
649ef7e25fSThierry Reding 0xae, 0xc1, 0x00, 0x7f, 0x00, 0xb0, 0xb6, 0xae, 0xc3, 0x00, 0x85 },
659ef7e25fSThierry Reding { 0xf9, 0x00, 0x97, 0xba, 0xb2, 0xc5, 0x00, 0x6c, 0x00, 0xb8, 0xb8,
669ef7e25fSThierry Reding 0xae, 0xc1, 0x00, 0x82, 0x00, 0xb0, 0xb6, 0xae, 0xc2, 0x00, 0x89 },
679ef7e25fSThierry Reding { 0xf9, 0x00, 0x9a, 0xba, 0xb1, 0xc4, 0x00, 0x6f, 0x00, 0xb8, 0xb8,
689ef7e25fSThierry Reding 0xad, 0xc0, 0x00, 0x86, 0x00, 0xb0, 0xb7, 0xad, 0xc0, 0x00, 0x8d },
699ef7e25fSThierry Reding { 0xf9, 0x00, 0x9c, 0xb9, 0xb0, 0xc4, 0x00, 0x72, 0x00, 0xb8, 0xb8,
709ef7e25fSThierry Reding 0xac, 0xbf, 0x00, 0x8a, 0x00, 0xb0, 0xb6, 0xac, 0xc0, 0x00, 0x91 },
719ef7e25fSThierry Reding { 0xf9, 0x00, 0x9e, 0xba, 0xb0, 0xc2, 0x00, 0x75, 0x00, 0xb9, 0xb8,
729ef7e25fSThierry Reding 0xab, 0xbe, 0x00, 0x8e, 0x00, 0xb0, 0xb6, 0xac, 0xbf, 0x00, 0x94 },
739ef7e25fSThierry Reding { 0xf9, 0x00, 0xa0, 0xb9, 0xaf, 0xc3, 0x00, 0x77, 0x00, 0xb9, 0xb7,
749ef7e25fSThierry Reding 0xab, 0xbe, 0x00, 0x90, 0x00, 0xb0, 0xb6, 0xab, 0xbf, 0x00, 0x97 },
759ef7e25fSThierry Reding { 0xf9, 0x00, 0xa2, 0xb9, 0xaf, 0xc2, 0x00, 0x7a, 0x00, 0xb9, 0xb7,
769ef7e25fSThierry Reding 0xaa, 0xbd, 0x00, 0x94, 0x00, 0xb0, 0xb5, 0xab, 0xbf, 0x00, 0x9a },
779ef7e25fSThierry Reding { 0xf9, 0x00, 0xa4, 0xb9, 0xaf, 0xc1, 0x00, 0x7d, 0x00, 0xb9, 0xb6,
789ef7e25fSThierry Reding 0xaa, 0xbb, 0x00, 0x97, 0x00, 0xb1, 0xb5, 0xaa, 0xbf, 0x00, 0x9d },
799ef7e25fSThierry Reding { 0xf9, 0x00, 0xa4, 0xb8, 0xb0, 0xbf, 0x00, 0x80, 0x00, 0xb8, 0xb6,
809ef7e25fSThierry Reding 0xaa, 0xbc, 0x00, 0x9a, 0x00, 0xb0, 0xb5, 0xab, 0xbd, 0x00, 0xa0 },
819ef7e25fSThierry Reding { 0xf9, 0x00, 0xa8, 0xb8, 0xae, 0xbe, 0x00, 0x84, 0x00, 0xb9, 0xb7,
829ef7e25fSThierry Reding 0xa8, 0xbc, 0x00, 0x9d, 0x00, 0xb2, 0xb5, 0xaa, 0xbc, 0x00, 0xa4 },
839ef7e25fSThierry Reding { 0xf9, 0x00, 0xa9, 0xb6, 0xad, 0xbf, 0x00, 0x86, 0x00, 0xb8, 0xb5,
849ef7e25fSThierry Reding 0xa8, 0xbc, 0x00, 0xa0, 0x00, 0xb3, 0xb3, 0xa9, 0xbc, 0x00, 0xa7 },
859ef7e25fSThierry Reding { 0xf9, 0x00, 0xa9, 0xb7, 0xae, 0xbd, 0x00, 0x89, 0x00, 0xb7, 0xb6,
869ef7e25fSThierry Reding 0xa8, 0xba, 0x00, 0xa4, 0x00, 0xb1, 0xb4, 0xaa, 0xbb, 0x00, 0xaa },
879ef7e25fSThierry Reding { 0xf9, 0x00, 0xa7, 0xb4, 0xae, 0xbf, 0x00, 0x91, 0x00, 0xb2, 0xb4,
889ef7e25fSThierry Reding 0xaa, 0xbb, 0x00, 0xac, 0x00, 0xb3, 0xb1, 0xaa, 0xbc, 0x00, 0xb3 },
899ef7e25fSThierry Reding };
909ef7e25fSThierry Reding
919ef7e25fSThierry Reding struct ld9040 {
929ef7e25fSThierry Reding struct device *dev;
939ef7e25fSThierry Reding struct drm_panel panel;
949ef7e25fSThierry Reding
959ef7e25fSThierry Reding struct regulator_bulk_data supplies[2];
969ef7e25fSThierry Reding struct gpio_desc *reset_gpio;
979ef7e25fSThierry Reding u32 power_on_delay;
989ef7e25fSThierry Reding u32 reset_delay;
999ef7e25fSThierry Reding struct videomode vm;
1009ef7e25fSThierry Reding u32 width_mm;
1019ef7e25fSThierry Reding u32 height_mm;
1029ef7e25fSThierry Reding
1039ef7e25fSThierry Reding int brightness;
1049ef7e25fSThierry Reding
1059ef7e25fSThierry Reding /* This field is tested by functions directly accessing bus before
1069ef7e25fSThierry Reding * transfer, transfer is skipped if it is set. In case of transfer
1079ef7e25fSThierry Reding * failure or unexpected response the field is set to error value.
1089ef7e25fSThierry Reding * Such construct allows to eliminate many checks in higher level
1099ef7e25fSThierry Reding * functions.
1109ef7e25fSThierry Reding */
1119ef7e25fSThierry Reding int error;
1129ef7e25fSThierry Reding };
1139ef7e25fSThierry Reding
panel_to_ld9040(struct drm_panel * panel)1149ef7e25fSThierry Reding static inline struct ld9040 *panel_to_ld9040(struct drm_panel *panel)
1159ef7e25fSThierry Reding {
1169ef7e25fSThierry Reding return container_of(panel, struct ld9040, panel);
1179ef7e25fSThierry Reding }
1189ef7e25fSThierry Reding
ld9040_clear_error(struct ld9040 * ctx)1199ef7e25fSThierry Reding static int ld9040_clear_error(struct ld9040 *ctx)
1209ef7e25fSThierry Reding {
1219ef7e25fSThierry Reding int ret = ctx->error;
1229ef7e25fSThierry Reding
1239ef7e25fSThierry Reding ctx->error = 0;
1249ef7e25fSThierry Reding return ret;
1259ef7e25fSThierry Reding }
1269ef7e25fSThierry Reding
ld9040_spi_write_word(struct ld9040 * ctx,u16 data)1279ef7e25fSThierry Reding static int ld9040_spi_write_word(struct ld9040 *ctx, u16 data)
1289ef7e25fSThierry Reding {
1299ef7e25fSThierry Reding struct spi_device *spi = to_spi_device(ctx->dev);
1309ef7e25fSThierry Reding struct spi_transfer xfer = {
1319ef7e25fSThierry Reding .len = 2,
1329ef7e25fSThierry Reding .tx_buf = &data,
1339ef7e25fSThierry Reding };
1349ef7e25fSThierry Reding struct spi_message msg;
1359ef7e25fSThierry Reding
1369ef7e25fSThierry Reding spi_message_init(&msg);
1379ef7e25fSThierry Reding spi_message_add_tail(&xfer, &msg);
1389ef7e25fSThierry Reding
1399ef7e25fSThierry Reding return spi_sync(spi, &msg);
1409ef7e25fSThierry Reding }
1419ef7e25fSThierry Reding
ld9040_dcs_write(struct ld9040 * ctx,const u8 * data,size_t len)1429ef7e25fSThierry Reding static void ld9040_dcs_write(struct ld9040 *ctx, const u8 *data, size_t len)
1439ef7e25fSThierry Reding {
1449ef7e25fSThierry Reding int ret = 0;
1459ef7e25fSThierry Reding
1469ef7e25fSThierry Reding if (ctx->error < 0 || len == 0)
1479ef7e25fSThierry Reding return;
1489ef7e25fSThierry Reding
1499ef7e25fSThierry Reding dev_dbg(ctx->dev, "writing dcs seq: %*ph\n", (int)len, data);
1509ef7e25fSThierry Reding ret = ld9040_spi_write_word(ctx, *data);
1519ef7e25fSThierry Reding
1529ef7e25fSThierry Reding while (!ret && --len) {
1539ef7e25fSThierry Reding ++data;
1549ef7e25fSThierry Reding ret = ld9040_spi_write_word(ctx, *data | 0x100);
1559ef7e25fSThierry Reding }
1569ef7e25fSThierry Reding
1579ef7e25fSThierry Reding if (ret) {
1589ef7e25fSThierry Reding dev_err(ctx->dev, "error %d writing dcs seq: %*ph\n", ret,
1599ef7e25fSThierry Reding (int)len, data);
1609ef7e25fSThierry Reding ctx->error = ret;
1619ef7e25fSThierry Reding }
1629ef7e25fSThierry Reding
1639ef7e25fSThierry Reding usleep_range(300, 310);
1649ef7e25fSThierry Reding }
1659ef7e25fSThierry Reding
1669ef7e25fSThierry Reding #define ld9040_dcs_write_seq_static(ctx, seq...) \
1679ef7e25fSThierry Reding ({\
1689ef7e25fSThierry Reding static const u8 d[] = { seq };\
1699ef7e25fSThierry Reding ld9040_dcs_write(ctx, d, ARRAY_SIZE(d));\
1709ef7e25fSThierry Reding })
1719ef7e25fSThierry Reding
ld9040_brightness_set(struct ld9040 * ctx)1729ef7e25fSThierry Reding static void ld9040_brightness_set(struct ld9040 *ctx)
1739ef7e25fSThierry Reding {
1749ef7e25fSThierry Reding ld9040_dcs_write(ctx, ld9040_gammas[ctx->brightness],
1759ef7e25fSThierry Reding ARRAY_SIZE(ld9040_gammas[ctx->brightness]));
1769ef7e25fSThierry Reding
1779ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MCS_GAMMA_CTRL, 0x02, 0x5a);
1789ef7e25fSThierry Reding }
1799ef7e25fSThierry Reding
ld9040_init(struct ld9040 * ctx)1809ef7e25fSThierry Reding static void ld9040_init(struct ld9040 *ctx)
1819ef7e25fSThierry Reding {
1829ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MCS_USER_SETTING, 0x5a, 0x5a);
1839ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MCS_PANEL_CONDITION,
18450f600fdSPaul Cercueil 0x05, 0x5e, 0x96, 0x6b, 0x7d, 0x0d, 0x3f, 0x00,
18550f600fdSPaul Cercueil 0x00, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18650f600fdSPaul Cercueil 0x07, 0x05, 0x1f, 0x1f, 0x1f, 0x00, 0x00);
1879ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MCS_DISPCTL,
18850f600fdSPaul Cercueil 0x02, 0x06, 0x0a, 0x10, 0x10);
1899ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MCS_MANPWR, 0x04);
1909ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MCS_POWER_CTRL,
1919ef7e25fSThierry Reding 0x0a, 0x87, 0x25, 0x6a, 0x44, 0x02, 0x88);
19250f600fdSPaul Cercueil ld9040_dcs_write_seq_static(ctx, MCS_ELVSS_ON, 0x0f, 0x00, 0x16);
1939ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MCS_GTCON, 0x09, 0x00, 0x00);
1949ef7e25fSThierry Reding ld9040_brightness_set(ctx);
1959ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MIPI_DCS_EXIT_SLEEP_MODE);
1969ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_ON);
1979ef7e25fSThierry Reding }
1989ef7e25fSThierry Reding
ld9040_power_on(struct ld9040 * ctx)1999ef7e25fSThierry Reding static int ld9040_power_on(struct ld9040 *ctx)
2009ef7e25fSThierry Reding {
2019ef7e25fSThierry Reding int ret;
2029ef7e25fSThierry Reding
2039ef7e25fSThierry Reding ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
2049ef7e25fSThierry Reding if (ret < 0)
2059ef7e25fSThierry Reding return ret;
2069ef7e25fSThierry Reding
2079ef7e25fSThierry Reding msleep(ctx->power_on_delay);
2089ef7e25fSThierry Reding gpiod_set_value(ctx->reset_gpio, 0);
2099ef7e25fSThierry Reding msleep(ctx->reset_delay);
2109ef7e25fSThierry Reding gpiod_set_value(ctx->reset_gpio, 1);
2119ef7e25fSThierry Reding msleep(ctx->reset_delay);
2129ef7e25fSThierry Reding
2139ef7e25fSThierry Reding return 0;
2149ef7e25fSThierry Reding }
2159ef7e25fSThierry Reding
ld9040_power_off(struct ld9040 * ctx)2169ef7e25fSThierry Reding static int ld9040_power_off(struct ld9040 *ctx)
2179ef7e25fSThierry Reding {
2189ef7e25fSThierry Reding return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
2199ef7e25fSThierry Reding }
2209ef7e25fSThierry Reding
ld9040_disable(struct drm_panel * panel)2219ef7e25fSThierry Reding static int ld9040_disable(struct drm_panel *panel)
2229ef7e25fSThierry Reding {
2239ef7e25fSThierry Reding return 0;
2249ef7e25fSThierry Reding }
2259ef7e25fSThierry Reding
ld9040_unprepare(struct drm_panel * panel)2269ef7e25fSThierry Reding static int ld9040_unprepare(struct drm_panel *panel)
2279ef7e25fSThierry Reding {
2289ef7e25fSThierry Reding struct ld9040 *ctx = panel_to_ld9040(panel);
2299ef7e25fSThierry Reding
2309ef7e25fSThierry Reding msleep(120);
2319ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_OFF);
2329ef7e25fSThierry Reding ld9040_dcs_write_seq_static(ctx, MIPI_DCS_ENTER_SLEEP_MODE);
2339ef7e25fSThierry Reding msleep(40);
2349ef7e25fSThierry Reding
2359ef7e25fSThierry Reding ld9040_clear_error(ctx);
2369ef7e25fSThierry Reding
2379ef7e25fSThierry Reding return ld9040_power_off(ctx);
2389ef7e25fSThierry Reding }
2399ef7e25fSThierry Reding
ld9040_prepare(struct drm_panel * panel)2409ef7e25fSThierry Reding static int ld9040_prepare(struct drm_panel *panel)
2419ef7e25fSThierry Reding {
2429ef7e25fSThierry Reding struct ld9040 *ctx = panel_to_ld9040(panel);
2439ef7e25fSThierry Reding int ret;
2449ef7e25fSThierry Reding
2459ef7e25fSThierry Reding ret = ld9040_power_on(ctx);
2469ef7e25fSThierry Reding if (ret < 0)
2479ef7e25fSThierry Reding return ret;
2489ef7e25fSThierry Reding
2499ef7e25fSThierry Reding ld9040_init(ctx);
2509ef7e25fSThierry Reding
2519ef7e25fSThierry Reding ret = ld9040_clear_error(ctx);
2529ef7e25fSThierry Reding
2539ef7e25fSThierry Reding if (ret < 0)
2549ef7e25fSThierry Reding ld9040_unprepare(panel);
2559ef7e25fSThierry Reding
2569ef7e25fSThierry Reding return ret;
2579ef7e25fSThierry Reding }
2589ef7e25fSThierry Reding
ld9040_enable(struct drm_panel * panel)2599ef7e25fSThierry Reding static int ld9040_enable(struct drm_panel *panel)
2609ef7e25fSThierry Reding {
2619ef7e25fSThierry Reding return 0;
2629ef7e25fSThierry Reding }
2639ef7e25fSThierry Reding
ld9040_get_modes(struct drm_panel * panel,struct drm_connector * connector)2640ce8ddd8SSam Ravnborg static int ld9040_get_modes(struct drm_panel *panel,
2650ce8ddd8SSam Ravnborg struct drm_connector *connector)
2669ef7e25fSThierry Reding {
2679ef7e25fSThierry Reding struct ld9040 *ctx = panel_to_ld9040(panel);
2689ef7e25fSThierry Reding struct drm_display_mode *mode;
2699ef7e25fSThierry Reding
2709ef7e25fSThierry Reding mode = drm_mode_create(connector->dev);
2719ef7e25fSThierry Reding if (!mode) {
2725936b3bdSSam Ravnborg dev_err(panel->dev, "failed to create a new display mode\n");
2739ef7e25fSThierry Reding return 0;
2749ef7e25fSThierry Reding }
2759ef7e25fSThierry Reding
2769ef7e25fSThierry Reding drm_display_mode_from_videomode(&ctx->vm, mode);
2779ef7e25fSThierry Reding mode->width_mm = ctx->width_mm;
2789ef7e25fSThierry Reding mode->height_mm = ctx->height_mm;
2799ef7e25fSThierry Reding connector->display_info.width_mm = mode->width_mm;
2809ef7e25fSThierry Reding connector->display_info.height_mm = mode->height_mm;
2819ef7e25fSThierry Reding
2829ef7e25fSThierry Reding mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
2839ef7e25fSThierry Reding drm_mode_probed_add(connector, mode);
2849ef7e25fSThierry Reding
2859ef7e25fSThierry Reding return 1;
2869ef7e25fSThierry Reding }
2879ef7e25fSThierry Reding
2889ef7e25fSThierry Reding static const struct drm_panel_funcs ld9040_drm_funcs = {
2899ef7e25fSThierry Reding .disable = ld9040_disable,
2909ef7e25fSThierry Reding .unprepare = ld9040_unprepare,
2919ef7e25fSThierry Reding .prepare = ld9040_prepare,
2929ef7e25fSThierry Reding .enable = ld9040_enable,
2939ef7e25fSThierry Reding .get_modes = ld9040_get_modes,
2949ef7e25fSThierry Reding };
2959ef7e25fSThierry Reding
ld9040_parse_dt(struct ld9040 * ctx)2969ef7e25fSThierry Reding static int ld9040_parse_dt(struct ld9040 *ctx)
2979ef7e25fSThierry Reding {
2989ef7e25fSThierry Reding struct device *dev = ctx->dev;
2999ef7e25fSThierry Reding struct device_node *np = dev->of_node;
3009ef7e25fSThierry Reding int ret;
3019ef7e25fSThierry Reding
3029ef7e25fSThierry Reding ret = of_get_videomode(np, &ctx->vm, 0);
3039ef7e25fSThierry Reding if (ret < 0)
3049ef7e25fSThierry Reding return ret;
3059ef7e25fSThierry Reding
3069ef7e25fSThierry Reding of_property_read_u32(np, "power-on-delay", &ctx->power_on_delay);
3079ef7e25fSThierry Reding of_property_read_u32(np, "reset-delay", &ctx->reset_delay);
3089ef7e25fSThierry Reding of_property_read_u32(np, "panel-width-mm", &ctx->width_mm);
3099ef7e25fSThierry Reding of_property_read_u32(np, "panel-height-mm", &ctx->height_mm);
3109ef7e25fSThierry Reding
3119ef7e25fSThierry Reding return 0;
3129ef7e25fSThierry Reding }
3139ef7e25fSThierry Reding
ld9040_bl_update_status(struct backlight_device * dev)314*c2268daaSPaul Cercueil static int ld9040_bl_update_status(struct backlight_device *dev)
315*c2268daaSPaul Cercueil {
316*c2268daaSPaul Cercueil struct ld9040 *ctx = bl_get_data(dev);
317*c2268daaSPaul Cercueil
318*c2268daaSPaul Cercueil ctx->brightness = backlight_get_brightness(dev);
319*c2268daaSPaul Cercueil ld9040_brightness_set(ctx);
320*c2268daaSPaul Cercueil
321*c2268daaSPaul Cercueil return 0;
322*c2268daaSPaul Cercueil }
323*c2268daaSPaul Cercueil
324*c2268daaSPaul Cercueil static const struct backlight_ops ld9040_bl_ops = {
325*c2268daaSPaul Cercueil .update_status = ld9040_bl_update_status,
326*c2268daaSPaul Cercueil };
327*c2268daaSPaul Cercueil
328*c2268daaSPaul Cercueil static const struct backlight_properties ld9040_bl_props = {
329*c2268daaSPaul Cercueil .type = BACKLIGHT_RAW,
330*c2268daaSPaul Cercueil .scale = BACKLIGHT_SCALE_NON_LINEAR,
331*c2268daaSPaul Cercueil .max_brightness = ARRAY_SIZE(ld9040_gammas) - 1,
332*c2268daaSPaul Cercueil .brightness = ARRAY_SIZE(ld9040_gammas) - 1,
333*c2268daaSPaul Cercueil };
334*c2268daaSPaul Cercueil
ld9040_probe(struct spi_device * spi)3359ef7e25fSThierry Reding static int ld9040_probe(struct spi_device *spi)
3369ef7e25fSThierry Reding {
337*c2268daaSPaul Cercueil struct backlight_device *bldev;
3389ef7e25fSThierry Reding struct device *dev = &spi->dev;
3399ef7e25fSThierry Reding struct ld9040 *ctx;
3409ef7e25fSThierry Reding int ret;
3419ef7e25fSThierry Reding
3429ef7e25fSThierry Reding ctx = devm_kzalloc(dev, sizeof(struct ld9040), GFP_KERNEL);
3439ef7e25fSThierry Reding if (!ctx)
3449ef7e25fSThierry Reding return -ENOMEM;
3459ef7e25fSThierry Reding
3469ef7e25fSThierry Reding spi_set_drvdata(spi, ctx);
3479ef7e25fSThierry Reding
3489ef7e25fSThierry Reding ctx->dev = dev;
349*c2268daaSPaul Cercueil ctx->brightness = ld9040_bl_props.brightness;
3509ef7e25fSThierry Reding
3519ef7e25fSThierry Reding ret = ld9040_parse_dt(ctx);
3529ef7e25fSThierry Reding if (ret < 0)
3539ef7e25fSThierry Reding return ret;
3549ef7e25fSThierry Reding
3559ef7e25fSThierry Reding ctx->supplies[0].supply = "vdd3";
3569ef7e25fSThierry Reding ctx->supplies[1].supply = "vci";
3579ef7e25fSThierry Reding ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
3589ef7e25fSThierry Reding ctx->supplies);
3599ef7e25fSThierry Reding if (ret < 0)
3609ef7e25fSThierry Reding return ret;
3619ef7e25fSThierry Reding
3629ef7e25fSThierry Reding ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
3639ef7e25fSThierry Reding if (IS_ERR(ctx->reset_gpio)) {
3649ef7e25fSThierry Reding dev_err(dev, "cannot get reset-gpios %ld\n",
3659ef7e25fSThierry Reding PTR_ERR(ctx->reset_gpio));
3669ef7e25fSThierry Reding return PTR_ERR(ctx->reset_gpio);
3679ef7e25fSThierry Reding }
3689ef7e25fSThierry Reding
3699ef7e25fSThierry Reding spi->bits_per_word = 9;
3709ef7e25fSThierry Reding ret = spi_setup(spi);
3719ef7e25fSThierry Reding if (ret < 0) {
3729ef7e25fSThierry Reding dev_err(dev, "spi setup failed.\n");
3739ef7e25fSThierry Reding return ret;
3749ef7e25fSThierry Reding }
3759ef7e25fSThierry Reding
3769a2654c0SLaurent Pinchart drm_panel_init(&ctx->panel, dev, &ld9040_drm_funcs,
3779a2654c0SLaurent Pinchart DRM_MODE_CONNECTOR_DPI);
3789ef7e25fSThierry Reding
379*c2268daaSPaul Cercueil bldev = devm_backlight_device_register(dev, dev_name(dev), dev,
380*c2268daaSPaul Cercueil ctx, &ld9040_bl_ops,
381*c2268daaSPaul Cercueil &ld9040_bl_props);
382*c2268daaSPaul Cercueil if (IS_ERR(bldev))
383*c2268daaSPaul Cercueil return PTR_ERR(bldev);
384*c2268daaSPaul Cercueil
385c3ee8c65SBernard Zhao drm_panel_add(&ctx->panel);
386c3ee8c65SBernard Zhao
387c3ee8c65SBernard Zhao return 0;
3889ef7e25fSThierry Reding }
3899ef7e25fSThierry Reding
ld9040_remove(struct spi_device * spi)390a0386bbaSUwe Kleine-König static void ld9040_remove(struct spi_device *spi)
3919ef7e25fSThierry Reding {
3929ef7e25fSThierry Reding struct ld9040 *ctx = spi_get_drvdata(spi);
3939ef7e25fSThierry Reding
3949ef7e25fSThierry Reding ld9040_power_off(ctx);
3959ef7e25fSThierry Reding drm_panel_remove(&ctx->panel);
3969ef7e25fSThierry Reding }
3979ef7e25fSThierry Reding
3989ef7e25fSThierry Reding static const struct of_device_id ld9040_of_match[] = {
3999ef7e25fSThierry Reding { .compatible = "samsung,ld9040" },
4009ef7e25fSThierry Reding { }
4019ef7e25fSThierry Reding };
4029ef7e25fSThierry Reding MODULE_DEVICE_TABLE(of, ld9040_of_match);
4039ef7e25fSThierry Reding
4046915db34SMarek Szyprowski static const struct spi_device_id ld9040_ids[] = {
4056915db34SMarek Szyprowski { "ld9040", },
4066915db34SMarek Szyprowski { /* sentinel */ }
4076915db34SMarek Szyprowski };
4086915db34SMarek Szyprowski MODULE_DEVICE_TABLE(spi, ld9040_ids);
4096915db34SMarek Szyprowski
4109ef7e25fSThierry Reding static struct spi_driver ld9040_driver = {
4119ef7e25fSThierry Reding .probe = ld9040_probe,
4129ef7e25fSThierry Reding .remove = ld9040_remove,
413af42167fSKrzysztof Kozlowski .id_table = ld9040_ids,
4149ef7e25fSThierry Reding .driver = {
4159ef7e25fSThierry Reding .name = "panel-samsung-ld9040",
4169ef7e25fSThierry Reding .of_match_table = ld9040_of_match,
4179ef7e25fSThierry Reding },
4189ef7e25fSThierry Reding };
4199ef7e25fSThierry Reding module_spi_driver(ld9040_driver);
4209ef7e25fSThierry Reding
4219ef7e25fSThierry Reding MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
4229ef7e25fSThierry Reding MODULE_DESCRIPTION("ld9040 LCD Driver");
4239ef7e25fSThierry Reding MODULE_LICENSE("GPL v2");
424