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Diffstat (limited to 'drivers/gpu/drm/panel/panel-himax-hx8394.c')
-rw-r--r--drivers/gpu/drm/panel/panel-himax-hx8394.c451
1 files changed, 451 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-himax-hx8394.c b/drivers/gpu/drm/panel/panel-himax-hx8394.c
new file mode 100644
index 0000000000..c73243d85d
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-himax-hx8394.c
@@ -0,0 +1,451 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for panels based on Himax HX8394 controller, such as:
+ *
+ * - HannStar HSD060BHW4 5.99" MIPI-DSI panel
+ *
+ * Copyright (C) 2021 Kamil Trzciński
+ *
+ * Based on drivers/gpu/drm/panel/panel-sitronix-st7703.c
+ * Copyright (C) Purism SPC 2019
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/media-bus-format.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.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>
+
+#define DRV_NAME "panel-himax-hx8394"
+
+/* Manufacturer specific commands sent via DSI, listed in HX8394-F datasheet */
+#define HX8394_CMD_SETSEQUENCE 0xb0
+#define HX8394_CMD_SETPOWER 0xb1
+#define HX8394_CMD_SETDISP 0xb2
+#define HX8394_CMD_SETCYC 0xb4
+#define HX8394_CMD_SETVCOM 0xb6
+#define HX8394_CMD_SETTE 0xb7
+#define HX8394_CMD_SETSENSOR 0xb8
+#define HX8394_CMD_SETEXTC 0xb9
+#define HX8394_CMD_SETMIPI 0xba
+#define HX8394_CMD_SETOTP 0xbb
+#define HX8394_CMD_SETREGBANK 0xbd
+#define HX8394_CMD_UNKNOWN1 0xc0
+#define HX8394_CMD_SETDGCLUT 0xc1
+#define HX8394_CMD_SETID 0xc3
+#define HX8394_CMD_SETDDB 0xc4
+#define HX8394_CMD_UNKNOWN2 0xc6
+#define HX8394_CMD_SETCABC 0xc9
+#define HX8394_CMD_SETCABCGAIN 0xca
+#define HX8394_CMD_SETPANEL 0xcc
+#define HX8394_CMD_SETOFFSET 0xd2
+#define HX8394_CMD_SETGIP0 0xd3
+#define HX8394_CMD_UNKNOWN3 0xd4
+#define HX8394_CMD_SETGIP1 0xd5
+#define HX8394_CMD_SETGIP2 0xd6
+#define HX8394_CMD_SETGPO 0xd6
+#define HX8394_CMD_SETSCALING 0xdd
+#define HX8394_CMD_SETIDLE 0xdf
+#define HX8394_CMD_SETGAMMA 0xe0
+#define HX8394_CMD_SETCHEMODE_DYN 0xe4
+#define HX8394_CMD_SETCHE 0xe5
+#define HX8394_CMD_SETCESEL 0xe6
+#define HX8394_CMD_SET_SP_CMD 0xe9
+#define HX8394_CMD_SETREADINDEX 0xfe
+#define HX8394_CMD_GETSPIREAD 0xff
+
+struct hx8394 {
+ struct device *dev;
+ struct drm_panel panel;
+ struct gpio_desc *reset_gpio;
+ struct regulator *vcc;
+ struct regulator *iovcc;
+ bool prepared;
+
+ const struct hx8394_panel_desc *desc;
+};
+
+struct hx8394_panel_desc {
+ const struct drm_display_mode *mode;
+ unsigned int lanes;
+ unsigned long mode_flags;
+ enum mipi_dsi_pixel_format format;
+ int (*init_sequence)(struct hx8394 *ctx);
+};
+
+static inline struct hx8394 *panel_to_hx8394(struct drm_panel *panel)
+{
+ return container_of(panel, struct hx8394, panel);
+}
+
+static int hsd060bhw4_init_sequence(struct hx8394 *ctx)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+
+ /* 5.19.8 SETEXTC: Set extension command (B9h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETEXTC,
+ 0xff, 0x83, 0x94);
+
+ /* 5.19.2 SETPOWER: Set power (B1h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
+ 0x48, 0x11, 0x71, 0x09, 0x32, 0x24, 0x71, 0x31, 0x55, 0x30);
+
+ /* 5.19.9 SETMIPI: Set MIPI control (BAh) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETMIPI,
+ 0x63, 0x03, 0x68, 0x6b, 0xb2, 0xc0);
+
+ /* 5.19.3 SETDISP: Set display related register (B2h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETDISP,
+ 0x00, 0x80, 0x78, 0x0c, 0x07);
+
+ /* 5.19.4 SETCYC: Set display waveform cycles (B4h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETCYC,
+ 0x12, 0x63, 0x12, 0x63, 0x12, 0x63, 0x01, 0x0c, 0x7c, 0x55,
+ 0x00, 0x3f, 0x12, 0x6b, 0x12, 0x6b, 0x12, 0x6b, 0x01, 0x0c,
+ 0x7c);
+
+ /* 5.19.19 SETGIP0: Set GIP Option0 (D3h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP0,
+ 0x00, 0x00, 0x00, 0x00, 0x3c, 0x1c, 0x00, 0x00, 0x32, 0x10,
+ 0x09, 0x00, 0x09, 0x32, 0x15, 0xad, 0x05, 0xad, 0x32, 0x00,
+ 0x00, 0x00, 0x00, 0x37, 0x03, 0x0b, 0x0b, 0x37, 0x00, 0x00,
+ 0x00, 0x0c, 0x40);
+
+ /* 5.19.20 Set GIP Option1 (D5h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP1,
+ 0x19, 0x19, 0x18, 0x18, 0x1b, 0x1b, 0x1a, 0x1a, 0x00, 0x01,
+ 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x20, 0x21, 0x18, 0x18,
+ 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+ 0x24, 0x25, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+ 0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
+
+ /* 5.19.21 Set GIP Option2 (D6h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP2,
+ 0x18, 0x18, 0x19, 0x19, 0x1b, 0x1b, 0x1a, 0x1a, 0x07, 0x06,
+ 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, 0x25, 0x24, 0x18, 0x18,
+ 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+ 0x21, 0x20, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
+ 0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
+
+ /* 5.19.25 SETGAMMA: Set gamma curve related setting (E0h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGAMMA,
+ 0x00, 0x04, 0x0c, 0x12, 0x14, 0x18, 0x1a, 0x18, 0x31, 0x3f,
+ 0x4d, 0x4c, 0x54, 0x65, 0x6b, 0x70, 0x7f, 0x82, 0x7e, 0x8a,
+ 0x99, 0x4a, 0x48, 0x49, 0x4b, 0x4a, 0x4c, 0x4b, 0x7f, 0x00,
+ 0x04, 0x0c, 0x11, 0x13, 0x17, 0x1a, 0x18, 0x31,
+ 0x3f, 0x4d, 0x4c, 0x54, 0x65, 0x6b, 0x70, 0x7f,
+ 0x82, 0x7e, 0x8a, 0x99, 0x4a, 0x48, 0x49, 0x4b,
+ 0x4a, 0x4c, 0x4b, 0x7f);
+
+ /* 5.19.17 SETPANEL (CCh) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPANEL,
+ 0x0b);
+
+ /* Unknown command, not listed in the HX8394-F datasheet */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN1,
+ 0x1f, 0x31);
+
+ /* 5.19.5 SETVCOM: Set VCOM voltage (B6h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETVCOM,
+ 0x7d, 0x7d);
+
+ /* Unknown command, not listed in the HX8394-F datasheet */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN3,
+ 0x02);
+
+ /* 5.19.11 Set register bank (BDh) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
+ 0x01);
+
+ /* 5.19.2 SETPOWER: Set power (B1h) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
+ 0x00);
+
+ /* 5.19.11 Set register bank (BDh) */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
+ 0x00);
+
+ /* Unknown command, not listed in the HX8394-F datasheet */
+ mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN3,
+ 0xed);
+
+ return 0;
+}
+
+static const struct drm_display_mode hsd060bhw4_mode = {
+ .hdisplay = 720,
+ .hsync_start = 720 + 40,
+ .hsync_end = 720 + 40 + 46,
+ .htotal = 720 + 40 + 46 + 40,
+ .vdisplay = 1440,
+ .vsync_start = 1440 + 9,
+ .vsync_end = 1440 + 9 + 7,
+ .vtotal = 1440 + 9 + 7 + 7,
+ .clock = 74250,
+ .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+ .width_mm = 68,
+ .height_mm = 136,
+};
+
+static const struct hx8394_panel_desc hsd060bhw4_desc = {
+ .mode = &hsd060bhw4_mode,
+ .lanes = 4,
+ .mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST,
+ .format = MIPI_DSI_FMT_RGB888,
+ .init_sequence = hsd060bhw4_init_sequence,
+};
+
+static int hx8394_enable(struct drm_panel *panel)
+{
+ struct hx8394 *ctx = panel_to_hx8394(panel);
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ int ret;
+
+ ret = ctx->desc->init_sequence(ctx);
+ if (ret) {
+ dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+ if (ret) {
+ dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
+ return ret;
+ }
+
+ /* Panel is operational 120 msec after reset */
+ msleep(120);
+
+ ret = mipi_dsi_dcs_set_display_on(dsi);
+ if (ret) {
+ dev_err(ctx->dev, "Failed to turn on the display: %d\n", ret);
+ goto sleep_in;
+ }
+
+ return 0;
+
+sleep_in:
+ /* This will probably fail, but let's try orderly power off anyway. */
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (!ret)
+ msleep(50);
+
+ return ret;
+}
+
+static int hx8394_disable(struct drm_panel *panel)
+{
+ struct hx8394 *ctx = panel_to_hx8394(panel);
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ int ret;
+
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (ret) {
+ dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
+ return ret;
+ }
+
+ msleep(50); /* about 3 frames */
+
+ return 0;
+}
+
+static int hx8394_unprepare(struct drm_panel *panel)
+{
+ struct hx8394 *ctx = panel_to_hx8394(panel);
+
+ if (!ctx->prepared)
+ return 0;
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
+ regulator_disable(ctx->iovcc);
+ regulator_disable(ctx->vcc);
+
+ ctx->prepared = false;
+
+ return 0;
+}
+
+static int hx8394_prepare(struct drm_panel *panel)
+{
+ struct hx8394 *ctx = panel_to_hx8394(panel);
+ int ret;
+
+ if (ctx->prepared)
+ return 0;
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
+ ret = regulator_enable(ctx->vcc);
+ if (ret) {
+ dev_err(ctx->dev, "Failed to enable vcc supply: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_enable(ctx->iovcc);
+ if (ret) {
+ dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
+ goto disable_vcc;
+ }
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+
+ msleep(180);
+
+ ctx->prepared = true;
+
+ return 0;
+
+disable_vcc:
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_disable(ctx->vcc);
+ return ret;
+}
+
+static int hx8394_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct hx8394 *ctx = panel_to_hx8394(panel);
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);
+ if (!mode) {
+ dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
+ ctx->desc->mode->hdisplay, ctx->desc->mode->vdisplay,
+ drm_mode_vrefresh(ctx->desc->mode));
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ connector->display_info.width_mm = mode->width_mm;
+ connector->display_info.height_mm = mode->height_mm;
+ drm_mode_probed_add(connector, mode);
+
+ return 1;
+}
+
+static const struct drm_panel_funcs hx8394_drm_funcs = {
+ .disable = hx8394_disable,
+ .unprepare = hx8394_unprepare,
+ .prepare = hx8394_prepare,
+ .enable = hx8394_enable,
+ .get_modes = hx8394_get_modes,
+};
+
+static int hx8394_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct hx8394 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ 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 gpio\n");
+
+ mipi_dsi_set_drvdata(dsi, ctx);
+
+ ctx->dev = dev;
+ ctx->desc = of_device_get_match_data(dev);
+
+ dsi->mode_flags = ctx->desc->mode_flags;
+ dsi->format = ctx->desc->format;
+ dsi->lanes = ctx->desc->lanes;
+
+ ctx->vcc = devm_regulator_get(dev, "vcc");
+ if (IS_ERR(ctx->vcc))
+ return dev_err_probe(dev, PTR_ERR(ctx->vcc),
+ "Failed to request vcc regulator\n");
+
+ ctx->iovcc = devm_regulator_get(dev, "iovcc");
+ if (IS_ERR(ctx->iovcc))
+ return dev_err_probe(dev, PTR_ERR(ctx->iovcc),
+ "Failed to request iovcc regulator\n");
+
+ drm_panel_init(&ctx->panel, dev, &hx8394_drm_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+
+ ret = drm_panel_of_backlight(&ctx->panel);
+ if (ret)
+ return ret;
+
+ drm_panel_add(&ctx->panel);
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "mipi_dsi_attach failed\n");
+ drm_panel_remove(&ctx->panel);
+ return ret;
+ }
+
+ dev_dbg(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
+ ctx->desc->mode->hdisplay, ctx->desc->mode->vdisplay,
+ drm_mode_vrefresh(ctx->desc->mode),
+ mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
+
+ return 0;
+}
+
+static void hx8394_shutdown(struct mipi_dsi_device *dsi)
+{
+ struct hx8394 *ctx = mipi_dsi_get_drvdata(dsi);
+ int ret;
+
+ ret = drm_panel_disable(&ctx->panel);
+ if (ret < 0)
+ dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);
+
+ ret = drm_panel_unprepare(&ctx->panel);
+ if (ret < 0)
+ dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);
+}
+
+static void hx8394_remove(struct mipi_dsi_device *dsi)
+{
+ struct hx8394 *ctx = mipi_dsi_get_drvdata(dsi);
+ int ret;
+
+ hx8394_shutdown(dsi);
+
+ 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 hx8394_of_match[] = {
+ { .compatible = "hannstar,hsd060bhw4", .data = &hsd060bhw4_desc },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, hx8394_of_match);
+
+static struct mipi_dsi_driver hx8394_driver = {
+ .probe = hx8394_probe,
+ .remove = hx8394_remove,
+ .shutdown = hx8394_shutdown,
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = hx8394_of_match,
+ },
+};
+module_mipi_dsi_driver(hx8394_driver);
+
+MODULE_AUTHOR("Kamil Trzciński <ayufan@ayufan.eu>");
+MODULE_DESCRIPTION("DRM driver for Himax HX8394 based MIPI DSI panels");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-02 00:41:24 +0000