[PATCH 3/4] drm/panel: Add driver for DJN HX83112B LCD panel
From: Luca Weiss
Date: Sat Feb 22 2025 - 12:59:44 EST
Add support for the 2160x1080 LCD panel from DJN bundled with a HX83112B
driver IC, as found on the Fairphone 3 smartphone.
Signed-off-by: Luca Weiss <luca@xxxxxxxxxxxx>
---
drivers/gpu/drm/panel/Kconfig | 10 +
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-himax-hx83112b.c | 430 +++++++++++++++++++++++++++
3 files changed, 441 insertions(+)
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index d7469c565d1db8b8e974dd6c45d03d9352d99d63..b32e300c563a3fd94134d61140f66cad18b4ebb6 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -173,6 +173,16 @@ config DRM_PANEL_HIMAX_HX83112A
Say Y here if you want to enable support for Himax HX83112A-based
display panels, such as the one found in the Fairphone 4 smartphone.
+config DRM_PANEL_HIMAX_HX83112B
+ tristate "Himax HX83112B-based DSI panel"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ select DRM_KMS_HELPER
+ help
+ Say Y here if you want to enable support for Himax HX83112B-based
+ display panels, such as the one found in the Fairphone 3 smartphone.
+
config DRM_PANEL_HIMAX_HX8394
tristate "HIMAX HX8394 MIPI-DSI LCD panels"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 7dcf72646cacff11bab90c78e3b8b1f357e5f14a..6257c3cd48b57b808c95c2e535f5624fd0e06efa 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o
obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o
obj-$(CONFIG_DRM_PANEL_HIMAX_HX83102) += panel-himax-hx83102.o
obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112A) += panel-himax-hx83112a.o
+obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112B) += panel-himax-hx83112b.o
obj-$(CONFIG_DRM_PANEL_HIMAX_HX8394) += panel-himax-hx8394.o
obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9341) += panel-ilitek-ili9341.o
diff --git a/drivers/gpu/drm/panel/panel-himax-hx83112b.c b/drivers/gpu/drm/panel/panel-himax-hx83112b.c
new file mode 100644
index 0000000000000000000000000000000000000000..031531b47a8814071bc5b7f5f28ed48ba08dab80
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-himax-hx83112b.c
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree.
+ * Copyright (c) 2025 Luca Weiss <luca@xxxxxxxxxxxx>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+/* Manufacturer specific DSI commands */
+#define HX83112B_SETPOWER1 0xb1
+#define HX83112B_SETDISP 0xb2
+#define HX83112B_SETDRV 0xb4
+#define HX83112B_SETEXTC 0xb9
+#define HX83112B_SETBANK 0xbd
+#define HX83112B_SETDGCLUT 0xc1
+#define HX83112B_SETDISMO 0xc2
+#define HX83112B_UNKNOWN1 0xc6
+#define HX83112B_SETPANEL 0xcc
+#define HX83112B_UNKNOWN2 0xd1
+#define HX83112B_SETPOWER2 0xd2
+#define HX83112B_SETGIP0 0xd3
+#define HX83112B_SETGIP1 0xd5
+#define HX83112B_SETGIP2 0xd6
+#define HX83112B_SETGIP3 0xd8
+#define HX83112B_SETIDLE 0xdd
+#define HX83112B_UNKNOWN3 0xe7
+#define HX83112B_UNKNOWN4 0xe9
+
+struct hx83112b_panel {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct regulator_bulk_data *supplies;
+ struct gpio_desc *reset_gpio;
+};
+
+static const struct regulator_bulk_data hx83112b_supplies[] = {
+ { .supply = "iovcc" },
+ { .supply = "vsn" },
+ { .supply = "vsp" },
+};
+
+static inline struct hx83112b_panel *to_hx83112b_panel(struct drm_panel *panel)
+{
+ return container_of(panel, struct hx83112b_panel, panel);
+}
+
+static void hx83112b_reset(struct hx83112b_panel *ctx)
+{
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ usleep_range(10000, 11000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ usleep_range(10000, 11000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ usleep_range(10000, 11000);
+}
+
+static int hx83112b_on(struct hx83112b_panel *ctx)
+{
+ struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETEXTC, 0x83, 0x11, 0x2b);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDISMO, 0x08, 0x70);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x03);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDISP, 0x04, 0x38, 0x08, 0x70);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETPOWER1,
+ 0xf8, 0x27, 0x27, 0x00, 0x00, 0x0b, 0x0e,
+ 0x0b, 0x0e, 0x33);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETPOWER2, 0x2d, 0x2d);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDISP,
+ 0x80, 0x02, 0x18, 0x80, 0x70, 0x00, 0x08,
+ 0x1c, 0x08, 0x11, 0x05);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0xd1);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDISP, 0x00, 0x08);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDISP, 0xb5, 0x0a);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETIDLE,
+ 0x00, 0x00, 0x08, 0x1c, 0x08, 0x34, 0x34,
+ 0x88);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDRV,
+ 0x65, 0x6b, 0x00, 0x00, 0xd0, 0xd4, 0x36,
+ 0xcf, 0x06, 0xce, 0x00, 0xce, 0x00, 0x00,
+ 0x00, 0x07, 0x00, 0x2a, 0x07, 0x01, 0x07,
+ 0x00, 0x00, 0x2a);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x03);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0xc3);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDRV, 0x01, 0x67, 0x2a);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDGCLUT, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDGCLUT,
+ 0xff, 0xfb, 0xf9, 0xf6, 0xf4, 0xf1, 0xef,
+ 0xea, 0xe7, 0xe5, 0xe2, 0xdf, 0xdd, 0xda,
+ 0xd8, 0xd5, 0xd2, 0xcf, 0xcc, 0xc5, 0xbe,
+ 0xb7, 0xb0, 0xa8, 0xa0, 0x98, 0x8e, 0x85,
+ 0x7b, 0x72, 0x69, 0x5e, 0x53, 0x48, 0x3e,
+ 0x35, 0x2b, 0x22, 0x17, 0x0d, 0x09, 0x07,
+ 0x05, 0x01, 0x00, 0x26, 0xf0, 0x86, 0x25,
+ 0x6e, 0xb6, 0xdd, 0xf3, 0xd8, 0xcc, 0x9b,
+ 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDGCLUT,
+ 0xff, 0xfb, 0xf9, 0xf6, 0xf4, 0xf1, 0xef,
+ 0xea, 0xe7, 0xe5, 0xe2, 0xdf, 0xdd, 0xda,
+ 0xd8, 0xd5, 0xd2, 0xcf, 0xcc, 0xc5, 0xbe,
+ 0xb7, 0xb0, 0xa8, 0xa0, 0x98, 0x8e, 0x85,
+ 0x7b, 0x72, 0x69, 0x5e, 0x53, 0x48, 0x3e,
+ 0x35, 0x2b, 0x22, 0x17, 0x0d, 0x09, 0x07,
+ 0x05, 0x01, 0x00, 0x26, 0xf0, 0x86, 0x25,
+ 0x6e, 0xb6, 0xdd, 0xf3, 0xd8, 0xcc, 0x9b,
+ 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x03);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDGCLUT,
+ 0xff, 0xfb, 0xf9, 0xf6, 0xf4, 0xf1, 0xef,
+ 0xea, 0xe7, 0xe5, 0xe2, 0xdf, 0xdd, 0xda,
+ 0xd8, 0xd5, 0xd2, 0xcf, 0xcc, 0xc5, 0xbe,
+ 0xb7, 0xb0, 0xa8, 0xa0, 0x98, 0x8e, 0x85,
+ 0x7b, 0x72, 0x69, 0x5e, 0x53, 0x48, 0x3e,
+ 0x35, 0x2b, 0x22, 0x17, 0x0d, 0x09, 0x07,
+ 0x05, 0x01, 0x00, 0x26, 0xf0, 0x86, 0x25,
+ 0x6e, 0xb6, 0xdd, 0xf3, 0xd8, 0xcc, 0x9b,
+ 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETDISMO, 0xc8);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETPANEL, 0x08);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP0,
+ 0x81, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
+ 0x04, 0x00, 0x01, 0x13, 0x40, 0x04, 0x09,
+ 0x09, 0x0b, 0x0b, 0x32, 0x10, 0x08, 0x00,
+ 0x08, 0x32, 0x10, 0x08, 0x00, 0x08, 0x32,
+ 0x10, 0x08, 0x00, 0x08, 0x00, 0x00, 0x0a,
+ 0x08, 0x7b);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0xc5);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN1, 0xf7);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0xd4);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN1, 0x6e);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0xef);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP0, 0x0c);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0xc8);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP0, 0xa1);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP1,
+ 0x18, 0x18, 0x19, 0x18, 0x18, 0x20, 0x18,
+ 0x18, 0x18, 0x10, 0x10, 0x18, 0x18, 0x00,
+ 0x00, 0x18, 0x18, 0x01, 0x01, 0x18, 0x18,
+ 0x28, 0x28, 0x18, 0x18, 0x18, 0x18, 0x18,
+ 0x2f, 0x2f, 0x30, 0x30, 0x31, 0x31, 0x35,
+ 0x35, 0x36, 0x36, 0x37, 0x37, 0x18, 0x18,
+ 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xfc,
+ 0xfc, 0x00, 0x00, 0xfc, 0xfc, 0x00, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP2,
+ 0x18, 0x18, 0x19, 0x18, 0x18, 0x20, 0x19,
+ 0x18, 0x18, 0x10, 0x10, 0x18, 0x18, 0x00,
+ 0x00, 0x18, 0x18, 0x01, 0x01, 0x18, 0x18,
+ 0x28, 0x28, 0x18, 0x18, 0x18, 0x18, 0x18,
+ 0x2f, 0x2f, 0x30, 0x30, 0x31, 0x31, 0x35,
+ 0x35, 0x36, 0x36, 0x37, 0x37, 0x18, 0x18,
+ 0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP3,
+ 0xaa, 0xaa, 0xaa, 0xaf, 0xea, 0xaa, 0xaa,
+ 0xaa, 0xaa, 0xaf, 0xea, 0xaa, 0xaa, 0xaa,
+ 0xab, 0xaf, 0xef, 0xaa, 0xaa, 0xaa, 0xaa,
+ 0xaf, 0xea, 0xaa);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP3,
+ 0xaa, 0xaa, 0xab, 0xaf, 0xea, 0xaa, 0xaa,
+ 0xaa, 0xae, 0xaf, 0xea, 0xaa);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP3,
+ 0xaa, 0xaa, 0xaa, 0xaf, 0xea, 0xaa, 0xaa,
+ 0xaa, 0xaa, 0xaf, 0xea, 0xaa);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x03);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETGIP3,
+ 0xba, 0xaa, 0xaa, 0xaf, 0xea, 0xaa, 0xaa,
+ 0xaa, 0xaa, 0xaf, 0xea, 0xaa, 0xba, 0xaa,
+ 0xaa, 0xaf, 0xea, 0xaa, 0xaa, 0xaa, 0xaa,
+ 0xaf, 0xea, 0xaa);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0xe4);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN3, 0x17, 0x69);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN3,
+ 0x09, 0x09, 0x00, 0x07, 0xe8, 0x00, 0x26,
+ 0x00, 0x07, 0x00, 0x00, 0xe8, 0x32, 0x00,
+ 0xe9, 0x0a, 0x0a, 0x00, 0x00, 0x00, 0x01,
+ 0x01, 0x00, 0x12, 0x04);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN3,
+ 0x02, 0x00, 0x01, 0x20, 0x01, 0x18, 0x08,
+ 0xa8, 0x09);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN3, 0x20, 0x20, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x03);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN3,
+ 0x00, 0xdc, 0x11, 0x70, 0x00, 0x20);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0xc9);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN3,
+ 0x2a, 0xce, 0x02, 0x70, 0x01, 0x04);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN4, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_SETBANK, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, HX83112B_UNKNOWN2, 0x27);
+ mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+ mipi_dsi_msleep(&dsi_ctx, 120);
+ mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+ mipi_dsi_msleep(&dsi_ctx, 20);
+ mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x0000);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+ 0x24);
+ mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+
+ return dsi_ctx.accum_err;
+}
+
+static int hx83112b_off(struct hx83112b_panel *ctx)
+{
+ struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+ mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+ mipi_dsi_msleep(&dsi_ctx, 20);
+ mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+ mipi_dsi_msleep(&dsi_ctx, 120);
+
+ return dsi_ctx.accum_err;
+}
+
+static int hx83112b_prepare(struct drm_panel *panel)
+{
+ struct hx83112b_panel *ctx = to_hx83112b_panel(panel);
+ struct device *dev = &ctx->dsi->dev;
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(hx83112b_supplies), ctx->supplies);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable regulators: %d\n", ret);
+ return ret;
+ }
+
+ hx83112b_reset(ctx);
+
+ ret = hx83112b_on(ctx);
+ if (ret < 0) {
+ dev_err(dev, "Failed to initialize panel: %d\n", ret);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(hx83112b_supplies), ctx->supplies);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int hx83112b_unprepare(struct drm_panel *panel)
+{
+ struct hx83112b_panel *ctx = to_hx83112b_panel(panel);
+ struct device *dev = &ctx->dsi->dev;
+ int ret;
+
+ ret = hx83112b_off(ctx);
+ if (ret < 0)
+ dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(hx83112b_supplies), ctx->supplies);
+
+ return 0;
+}
+
+static const struct drm_display_mode hx83112b_mode = {
+ .clock = (1080 + 40 + 4 + 12) * (2160 + 32 + 2 + 2) * 60 / 1000,
+ .hdisplay = 1080,
+ .hsync_start = 1080 + 40,
+ .hsync_end = 1080 + 40 + 4,
+ .htotal = 1080 + 40 + 4 + 12,
+ .vdisplay = 2160,
+ .vsync_start = 2160 + 32,
+ .vsync_end = 2160 + 32 + 2,
+ .vtotal = 2160 + 32 + 2 + 2,
+ .width_mm = 65,
+ .height_mm = 128,
+ .type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int hx83112b_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ return drm_connector_helper_get_modes_fixed(connector, &hx83112b_mode);
+}
+
+static const struct drm_panel_funcs hx83112b_panel_funcs = {
+ .prepare = hx83112b_prepare,
+ .unprepare = hx83112b_unprepare,
+ .get_modes = hx83112b_get_modes,
+};
+
+static int hx83112b_bl_update_status(struct backlight_device *bl)
+{
+ struct mipi_dsi_device *dsi = bl_get_data(bl);
+ u16 brightness = backlight_get_brightness(bl);
+ int ret;
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
+ if (ret < 0)
+ return ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ return 0;
+}
+
+static const struct backlight_ops hx83112b_bl_ops = {
+ .update_status = hx83112b_bl_update_status,
+};
+
+static struct backlight_device *
+hx83112b_create_backlight(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ const struct backlight_properties props = {
+ .type = BACKLIGHT_RAW,
+ .brightness = 4095,
+ .max_brightness = 4095,
+ };
+
+ return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+ &hx83112b_bl_ops, &props);
+}
+
+static int hx83112b_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct hx83112b_panel *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ret = devm_regulator_bulk_get_const(dev,
+ ARRAY_SIZE(hx83112b_supplies),
+ hx83112b_supplies,
+ &ctx->supplies);
+ if (ret < 0)
+ return ret;
+
+ ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ctx->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
+ "Failed to get reset-gpios\n");
+
+ ctx->dsi = dsi;
+ mipi_dsi_set_drvdata(dsi, ctx);
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS |
+ MIPI_DSI_MODE_VIDEO_NO_HSA | MIPI_DSI_MODE_LPM;
+
+ drm_panel_init(&ctx->panel, dev, &hx83112b_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ ctx->panel.prepare_prev_first = true;
+
+ ctx->panel.backlight = hx83112b_create_backlight(dsi);
+ if (IS_ERR(ctx->panel.backlight))
+ return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
+ "Failed to create backlight\n");
+
+ drm_panel_add(&ctx->panel);
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ drm_panel_remove(&ctx->panel);
+ return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
+ }
+
+ return 0;
+}
+
+static void hx83112b_remove(struct mipi_dsi_device *dsi)
+{
+ struct hx83112b_panel *ctx = mipi_dsi_get_drvdata(dsi);
+ int ret;
+
+ ret = mipi_dsi_detach(dsi);
+ if (ret < 0)
+ dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
+
+ drm_panel_remove(&ctx->panel);
+}
+
+static const struct of_device_id hx83112b_of_match[] = {
+ { .compatible = "djn,fairphone-fp3-panel" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, hx83112b_of_match);
+
+static struct mipi_dsi_driver hx83112b_driver = {
+ .probe = hx83112b_probe,
+ .remove = hx83112b_remove,
+ .driver = {
+ .name = "panel-himax-hx83112b",
+ .of_match_table = hx83112b_of_match,
+ },
+};
+module_mipi_dsi_driver(hx83112b_driver);
+
+MODULE_DESCRIPTION("DRM driver for hx83112b-equipped DSI panels");
+MODULE_LICENSE("GPL");
--
2.48.1