[PATCH v2] drm/panel: ilitek-ili9881c: add Mingjun MJ070BI30IA2
From: Icenowy Zheng
Date: Mon Nov 02 2026 - 09:25:41 EST
Mingjun MJ070BI30IA2 is a 7" MIPI DSI LCD panel used by Lichee Console
4A, with a initialization sequence matching the pattern of Ilitek
ILI9881C driver chip.
Add it to the driver for ILI9881C-based panels.
As the sequence provided by Sipeed is captured with a logic analyzer,
some values are obviously wrong and I patched them with other panels'
sequence as reference. This fixes a weird problem that the liquid
crystal gets DC polarized when the panel enters sleep mode, and I am
grateful to Sashiko for pointing this out.
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Signed-off-by: Icenowy Zheng <zhengxingda@xxxxxxxxxxx>
---
Changes in v2:
- Made all hex values in the initialization sequence lower case to match
other panels.
- Fixed some obvious errors in the initialization sequence as pointed by
Sashiko. This also removes the need for doing soft reset in
unprepare callback.
- Added Neil's R-b.
- Rebased on top of drm-misc-next.
drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 222 ++++++++++++++++++
1 file changed, 222 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
index acc560dc5ea5d..0854c4cf7ebd7 100644
--- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
@@ -2387,6 +2387,201 @@ static const struct ili9881c_instr dt300249_init[] = {
ILI9881C_COMMAND_INSTR(0xd3, 0x3f),
};
+static const struct ili9881c_instr mj070bi30ia2_init[] = {
+ ILI9881C_SWITCH_PAGE_INSTR(3),
+ ILI9881C_COMMAND_INSTR(0x01, 0x00),
+ ILI9881C_COMMAND_INSTR(0x02, 0x00),
+ ILI9881C_COMMAND_INSTR(0x03, 0x73),
+ ILI9881C_COMMAND_INSTR(0x04, 0x13),
+ ILI9881C_COMMAND_INSTR(0x05, 0x00),
+ ILI9881C_COMMAND_INSTR(0x06, 0x0a),
+ ILI9881C_COMMAND_INSTR(0x07, 0x05),
+ ILI9881C_COMMAND_INSTR(0x08, 0x00), /* raw capture 0x11, 0x00 */
+ ILI9881C_COMMAND_INSTR(0x09, 0x28),
+ ILI9881C_COMMAND_INSTR(0x0a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x0b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x0c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x0d, 0x28),
+ ILI9881C_COMMAND_INSTR(0x0e, 0x00),
+ ILI9881C_COMMAND_INSTR(0x0f, 0x28),
+ ILI9881C_COMMAND_INSTR(0x10, 0x28),
+ ILI9881C_COMMAND_INSTR(0x11, 0x00),
+ ILI9881C_COMMAND_INSTR(0x12, 0x00),
+ ILI9881C_COMMAND_INSTR(0x13, 0x00),
+ ILI9881C_COMMAND_INSTR(0x14, 0x00),
+ ILI9881C_COMMAND_INSTR(0x15, 0x00),
+ ILI9881C_COMMAND_INSTR(0x16, 0x00),
+ ILI9881C_COMMAND_INSTR(0x17, 0x00),
+ ILI9881C_COMMAND_INSTR(0x18, 0x00),
+ ILI9881C_COMMAND_INSTR(0x19, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1d, 0x00),
+ ILI9881C_COMMAND_INSTR(0x1e, 0x40),
+ ILI9881C_COMMAND_INSTR(0x1f, 0x80),
+ ILI9881C_COMMAND_INSTR(0x20, 0x06),
+ ILI9881C_COMMAND_INSTR(0x21, 0x01),
+ ILI9881C_COMMAND_INSTR(0x22, 0x00),
+ ILI9881C_COMMAND_INSTR(0x23, 0x00),
+ ILI9881C_COMMAND_INSTR(0x24, 0x00),
+ ILI9881C_COMMAND_INSTR(0x25, 0x00),
+ ILI9881C_COMMAND_INSTR(0x26, 0x00),
+ ILI9881C_COMMAND_INSTR(0x27, 0x00),
+ ILI9881C_COMMAND_INSTR(0x28, 0x33),
+ ILI9881C_COMMAND_INSTR(0x29, 0x33),
+ ILI9881C_COMMAND_INSTR(0x2a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x2c, 0x04),
+ ILI9881C_COMMAND_INSTR(0x2d, 0x0c),
+ ILI9881C_COMMAND_INSTR(0x2e, 0x05),
+ ILI9881C_COMMAND_INSTR(0x2f, 0x05),
+ ILI9881C_COMMAND_INSTR(0x30, 0x00),
+ ILI9881C_COMMAND_INSTR(0x31, 0x00),
+ ILI9881C_COMMAND_INSTR(0x32, 0x31),
+ ILI9881C_COMMAND_INSTR(0x33, 0x00),
+ ILI9881C_COMMAND_INSTR(0x34, 0x00),
+ ILI9881C_COMMAND_INSTR(0x35, 0x0a),
+ ILI9881C_COMMAND_INSTR(0x36, 0x00),
+ ILI9881C_COMMAND_INSTR(0x37, 0x08),
+ ILI9881C_COMMAND_INSTR(0x38, 0x00), /* raw capture 0x70, 0x00 */
+ ILI9881C_COMMAND_INSTR(0x39, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3c, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3d, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3e, 0x00),
+ ILI9881C_COMMAND_INSTR(0x3f, 0x00),
+ ILI9881C_COMMAND_INSTR(0x40, 0x00),
+ ILI9881C_COMMAND_INSTR(0x41, 0x00),
+ ILI9881C_COMMAND_INSTR(0x42, 0x00),
+ ILI9881C_COMMAND_INSTR(0x43, 0x08),
+ ILI9881C_COMMAND_INSTR(0x44, 0x00),
+ ILI9881C_COMMAND_INSTR(0x50, 0x01), /* raw capture 0xa0, 0x00 */
+ ILI9881C_COMMAND_INSTR(0x51, 0x23), /* raw capture 0x51, 0x22 */
+ ILI9881C_COMMAND_INSTR(0x52, 0x45),
+ ILI9881C_COMMAND_INSTR(0x53, 0x67),
+ ILI9881C_COMMAND_INSTR(0x54, 0x89),
+ ILI9881C_COMMAND_INSTR(0x55, 0xab),
+ ILI9881C_COMMAND_INSTR(0x56, 0x01),
+ ILI9881C_COMMAND_INSTR(0x57, 0x23),
+ ILI9881C_COMMAND_INSTR(0x58, 0x45),
+ ILI9881C_COMMAND_INSTR(0x59, 0x67),
+ ILI9881C_COMMAND_INSTR(0x5a, 0x89),
+ ILI9881C_COMMAND_INSTR(0x5b, 0xab),
+ ILI9881C_COMMAND_INSTR(0x5c, 0xcd),
+ ILI9881C_COMMAND_INSTR(0x5d, 0xef),
+ ILI9881C_COMMAND_INSTR(0x5e, 0x11),
+ ILI9881C_COMMAND_INSTR(0x5f, 0x02),
+ ILI9881C_COMMAND_INSTR(0x60, 0x08),
+ ILI9881C_COMMAND_INSTR(0x61, 0x0e),
+ ILI9881C_COMMAND_INSTR(0x62, 0x0f),
+ ILI9881C_COMMAND_INSTR(0x63, 0x0c),
+ ILI9881C_COMMAND_INSTR(0x64, 0x0d),
+ ILI9881C_COMMAND_INSTR(0x65, 0x17),
+ ILI9881C_COMMAND_INSTR(0x66, 0x01),
+ ILI9881C_COMMAND_INSTR(0x67, 0x01),
+ ILI9881C_COMMAND_INSTR(0x68, 0x02),
+ ILI9881C_COMMAND_INSTR(0x69, 0x02),
+ ILI9881C_COMMAND_INSTR(0x6a, 0x00),
+ ILI9881C_COMMAND_INSTR(0x6b, 0x00),
+ ILI9881C_COMMAND_INSTR(0x6c, 0x02),
+ ILI9881C_COMMAND_INSTR(0x6d, 0x02),
+ ILI9881C_COMMAND_INSTR(0x6e, 0x16),
+ ILI9881C_COMMAND_INSTR(0x6f, 0x16),
+ ILI9881C_COMMAND_INSTR(0x70, 0x06),
+ ILI9881C_COMMAND_INSTR(0x71, 0x06),
+ ILI9881C_COMMAND_INSTR(0x72, 0x07),
+ ILI9881C_COMMAND_INSTR(0x73, 0x07),
+ ILI9881C_COMMAND_INSTR(0x74, 0x02),
+ ILI9881C_COMMAND_INSTR(0x75, 0x02),
+ ILI9881C_COMMAND_INSTR(0x76, 0x08),
+ ILI9881C_COMMAND_INSTR(0x77, 0x0e),
+ ILI9881C_COMMAND_INSTR(0x78, 0x0f),
+ ILI9881C_COMMAND_INSTR(0x79, 0x0c),
+ ILI9881C_COMMAND_INSTR(0x7a, 0x0d),
+ ILI9881C_COMMAND_INSTR(0x7b, 0x17),
+ ILI9881C_COMMAND_INSTR(0x7c, 0x01),
+ ILI9881C_COMMAND_INSTR(0x7d, 0x01),
+ ILI9881C_COMMAND_INSTR(0x7e, 0x02),
+ ILI9881C_COMMAND_INSTR(0x7f, 0x02),
+ ILI9881C_COMMAND_INSTR(0x80, 0x00),
+ ILI9881C_COMMAND_INSTR(0x81, 0x00),
+ ILI9881C_COMMAND_INSTR(0x82, 0x02),
+ ILI9881C_COMMAND_INSTR(0x83, 0x02),
+ ILI9881C_COMMAND_INSTR(0x84, 0x16),
+ ILI9881C_COMMAND_INSTR(0x85, 0x16),
+ ILI9881C_COMMAND_INSTR(0x86, 0x06),
+ ILI9881C_COMMAND_INSTR(0x87, 0x06),
+ ILI9881C_COMMAND_INSTR(0x88, 0x07),
+ ILI9881C_COMMAND_INSTR(0x89, 0x07),
+ ILI9881C_COMMAND_INSTR(0x8a, 0x02),
+
+ ILI9881C_SWITCH_PAGE_INSTR(4),
+ ILI9881C_COMMAND_INSTR(0x6e, 0x1a),
+ ILI9881C_COMMAND_INSTR(0x6f, 0x37),
+ ILI9881C_COMMAND_INSTR(0x3a, 0xa4),
+ ILI9881C_COMMAND_INSTR(0x8d, 0x1f),
+ ILI9881C_COMMAND_INSTR(0x87, 0xba),
+ ILI9881C_COMMAND_INSTR(0xb2, 0xd1),
+ ILI9881C_COMMAND_INSTR(0x88, 0x0b),
+ ILI9881C_COMMAND_INSTR(0x38, 0x01),
+ ILI9881C_COMMAND_INSTR(0x39, 0x00),
+ ILI9881C_COMMAND_INSTR(0xb5, 0x02),
+ ILI9881C_COMMAND_INSTR(0x31, 0x25),
+ ILI9881C_COMMAND_INSTR(0x3b, 0x98),
+
+ ILI9881C_SWITCH_PAGE_INSTR(1),
+ ILI9881C_COMMAND_INSTR(0x22, 0x0a),
+ ILI9881C_COMMAND_INSTR(0x31, 0x00),
+ ILI9881C_COMMAND_INSTR(0x53, 0x4c), /* raw capture 0xa6, 0xa6 */
+ ILI9881C_COMMAND_INSTR(0x55, 0x3d),
+ ILI9881C_COMMAND_INSTR(0x50, 0x9e),
+ ILI9881C_COMMAND_INSTR(0x51, 0x99),
+ ILI9881C_COMMAND_INSTR(0x60, 0x06),
+ ILI9881C_COMMAND_INSTR(0x62, 0x20),
+ ILI9881C_COMMAND_INSTR(0xa0, 0x00),
+ ILI9881C_COMMAND_INSTR(0xa1, 0x17),
+ ILI9881C_COMMAND_INSTR(0xa2, 0x26),
+ ILI9881C_COMMAND_INSTR(0xa3, 0x13),
+ ILI9881C_COMMAND_INSTR(0xa4, 0x16),
+ ILI9881C_COMMAND_INSTR(0xa5, 0x29),
+ ILI9881C_COMMAND_INSTR(0xa6, 0x1e),
+ ILI9881C_COMMAND_INSTR(0xa7, 0x1f),
+ ILI9881C_COMMAND_INSTR(0xa8, 0x8b),
+ ILI9881C_COMMAND_INSTR(0xa9, 0x1d),
+ ILI9881C_COMMAND_INSTR(0xaa, 0x2a),
+ ILI9881C_COMMAND_INSTR(0xab, 0x7b),
+ ILI9881C_COMMAND_INSTR(0xac, 0x1a),
+ ILI9881C_COMMAND_INSTR(0xad, 0x19),
+ ILI9881C_COMMAND_INSTR(0xae, 0x4e),
+ ILI9881C_COMMAND_INSTR(0xaf, 0x24),
+ ILI9881C_COMMAND_INSTR(0xb0, 0x29),
+ ILI9881C_COMMAND_INSTR(0xb1, 0x4f),
+ ILI9881C_COMMAND_INSTR(0xb2, 0x5c),
+ ILI9881C_COMMAND_INSTR(0xb3, 0x3e),
+ ILI9881C_COMMAND_INSTR(0xc0, 0x00),
+ ILI9881C_COMMAND_INSTR(0xc1, 0x17),
+ ILI9881C_COMMAND_INSTR(0xc2, 0x26),
+ ILI9881C_COMMAND_INSTR(0xc3, 0x13),
+ ILI9881C_COMMAND_INSTR(0xc4, 0x16),
+ ILI9881C_COMMAND_INSTR(0xc5, 0x29),
+ ILI9881C_COMMAND_INSTR(0xc6, 0x1e),
+ ILI9881C_COMMAND_INSTR(0xc7, 0x1f),
+ ILI9881C_COMMAND_INSTR(0xc8, 0x8b),
+ ILI9881C_COMMAND_INSTR(0xc9, 0x1d),
+ ILI9881C_COMMAND_INSTR(0xca, 0x2a),
+ ILI9881C_COMMAND_INSTR(0xcb, 0x7b),
+ ILI9881C_COMMAND_INSTR(0xcc, 0x1a),
+ ILI9881C_COMMAND_INSTR(0xcd, 0x19),
+ ILI9881C_COMMAND_INSTR(0xce, 0x4e),
+ ILI9881C_COMMAND_INSTR(0xcf, 0x24),
+ ILI9881C_COMMAND_INSTR(0xd0, 0x29),
+ ILI9881C_COMMAND_INSTR(0xd1, 0x4d),
+ ILI9881C_COMMAND_INSTR(0xd2, 0x5c),
+ ILI9881C_COMMAND_INSTR(0xd3, 0x3e),
+};
+
static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)
{
return container_of(panel, struct ili9881c, panel);
@@ -2699,6 +2894,23 @@ static const struct drm_display_mode dt300249_default_mode = {
.height_mm = 121,
};
+static const struct drm_display_mode mj070bi30ia2_mode = {
+ .clock = 75750,
+
+ .hdisplay = 800,
+ .hsync_start = 800 + 48,
+ .hsync_end = 800 + 48 + 32,
+ .htotal = 800 + 48 + 32 + 80,
+
+ .vdisplay = 1280,
+ .vsync_start = 1280 + 3,
+ .vsync_end = 1280 + 3 + 10,
+ .vtotal = 1280 + 3 + 10 + 24,
+
+ .width_mm = 94,
+ .height_mm = 150,
+};
+
static int ili9881c_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
@@ -2913,6 +3125,15 @@ static const struct ili9881c_desc dt300249_desc = {
.lanes = 4,
};
+static const struct ili9881c_desc mj070bi30ia2_desc = {
+ .init = mj070bi30ia2_init,
+ .init_length = ARRAY_SIZE(mj070bi30ia2_init),
+ .mode = &mj070bi30ia2_mode,
+ .mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+ MIPI_DSI_MODE_LPM,
+ .lanes = 4,
+};
+
static const struct of_device_id ili9881c_of_match[] = {
{ .compatible = "bananapi,lhr050h41", .data = &lhr050h41_desc },
{ .compatible = "bestar,bsd1218-a101kl68", .data = &bsd1218_a101kl68_desc },
@@ -2924,6 +3145,7 @@ static const struct of_device_id ili9881c_of_match[] = {
{ .compatible = "wanchanglong,w552946aba", .data = &w552946aba_desc },
{ .compatible = "waveshare,7.0-dsi-touch-a", .data = &waveshare_7inch_a_desc },
{ .compatible = "ampire,am8001280g", .data = &am8001280g_desc },
+ { .compatible = "mingjun,mj070bi30ia2", .data = &mj070bi30ia2_desc },
{ .compatible = "raspberrypi,dsi-5inch", &rpi_5inch_desc },
{ .compatible = "raspberrypi,dsi-7inch", &rpi_7inch_desc },
{ }
--
2.56.0