[PATCH 4/4] drm/panel: ilitek-ili9882t: Add support for Ilitek ILI79600A-based panels
Marek Vasut
marek.vasut+renesas at mailbox.org
Sun Aug 9 12:58:53 PDT 2026
The Ilitek ILI79600A display controller is similar to the ILI9882T and can
be supported within the existing `panel-ilitek-ili9882t.c` driver.
This patch extends the ILI9882T driver to handle ILI79600A-based panels,
such as the 10" Raspberry Pi Touch Display 2. The ILI79600A uses a similar
command sequence and initialization flow, with minor differences in power
supply configuration and timing.
Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
---
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: Dave Stevenson <dave.stevenson at raspberrypi.com>
Cc: David Airlie <airlied at gmail.com>
Cc: Jessica Zhang <jesszhan0024 at gmail.com>
Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: Neil Armstrong <neil.armstrong at linaro.org>
Cc: Rob Herring <robh at kernel.org>
Cc: Simona Vetter <simona at ffwll.ch>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: devicetree at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Cc: linux-renesas-soc at vger.kernel.org
---
drivers/gpu/drm/panel/panel-ilitek-ili9882t.c | 231 ++++++++++++++++++
1 file changed, 231 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
index 24e72ad0d29a1..5581100a1f8a5 100644
--- a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
@@ -133,6 +133,207 @@ static const struct drm_dsc_config tianma_il79900a_dsc = {
.flatness_min_qp = 3,
};
+static int rpi_10inch_init(struct ili9882t *ili)
+{
+ struct mipi_dsi_multi_context ctx = { .dsi = ili->dsi };
+
+ mipi_dsi_usleep_range(&ctx, 5000, 5100);
+
+ il79900a_switch_page(&ctx, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x00, 0x42);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x01, 0x11);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x02, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x03, 0x00);
+
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x04, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x05, 0x11);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x06, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x07, 0x00);
+
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x08, 0x80);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x09, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0a, 0x71);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0c, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0e, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0d, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0f, 0x00);
+
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x30, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x31, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x32, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x33, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x34, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x35, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x36, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x37, 0x28);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x38, 0x29);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x39, 0x11);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x3A, 0x13);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x3B, 0x15);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x3C, 0x17);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x3D, 0x09);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x3E, 0x0D);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x3F, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x40, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x41, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x42, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x43, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x44, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x45, 0x02);
+
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x48, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x49, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x4A, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x4B, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x4C, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x4D, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x4E, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x4F, 0x28);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x50, 0x29);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x51, 0x10);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x52, 0x12);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x53, 0x14);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x54, 0x16);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x55, 0x08);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x56, 0x0C);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x57, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x58, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x59, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x5A, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x5B, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x5C, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x5D, 0x02);
+
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x2C, 0xB0);
+
+ il79900a_switch_page(&ctx, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x07, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x06, 0xD2);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x53, 0x1F);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x5E, 0x40);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x84, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x29, 0x3A);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x2A, 0x3B);
+
+ il79900a_switch_page(&ctx, 0x03);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x20, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x21, 0x3C);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x22, 0xFA);
+
+ il79900a_switch_page(&ctx, 0x12);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x87, 0x2C);
+
+ il79900a_switch_page(&ctx, 0x05);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x61, 0x8F);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x6D, 0xBB);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x5A, 0x7C);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x67, 0x7C);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x54, 0x92);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x55, 0x92);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x40, 0xD2);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x46, 0x70);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x30, 0x47);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x7A, 0x89);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xA4, 0x0B);
+
+ il79900a_switch_page(&ctx, 0x06);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xC0, 0x80);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xC1, 0x7);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xCA, 0x58);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xCB, 0x2);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xCE, 0x58);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xCF, 0x2);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x10, 0x0);
+
+ il79900a_switch_page(&ctx, 0x0b);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x76, 0x55);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x78, 0x68);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x77, 0x0D);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x79, 0x60);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x7A, 0x10);
+
+ il79900a_switch_page(&ctx, 0x08);
+ mipi_dsi_dcs_write_seq_multi(&ctx,
+ 0xE0, 0x00, 0x1E, 0x3F,
+ 0x68, 0x7D, 0x72, 0x86,
+ 0x89, 0x92, 0x8E, 0xA5,
+ 0xA8, 0xAA, 0xBD, 0xB8,
+ 0xBE, 0xC5, 0xD6, 0xCD,
+ 0xC3, 0xDA, 0xEB, 0xED);
+ mipi_dsi_dcs_write_seq_multi(&ctx,
+ 0xE1, 0x00, 0x1E, 0x3F,
+ 0x68, 0x7D, 0x72, 0x86,
+ 0x89, 0x92, 0x8E, 0xA5,
+ 0xA8, 0xAA, 0xBD, 0xB8,
+ 0xBE, 0xC5, 0xD6, 0xCD,
+ 0xC3, 0xDA, 0xEB, 0xED);
+
+ il79900a_switch_page(&ctx, 0x14);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x85, 0xCC);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x87, 0x91);
+
+ il79900a_switch_page(&ctx, 0x10);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x11, 0x3);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x12, 0x34);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x10, 0x1);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x13, 0x4);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x14, 0xBB);
+
+ il79900a_switch_page(&ctx, 0x0b);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x94, 0x88);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x95, 0x23);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x96, 0x0B);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x97, 0x0B);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x98, 0xC6);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x99, 0xC6);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xA6, 0x47);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xA7, 0x77);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xA8, 0x5);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xA9, 0x5);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xAA, 0xBA);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xAB, 0xBA);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xBD, 0x92);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xBE, 0xE0);
+
+ il79900a_switch_page(&ctx, 0x0e);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0, 0x80);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x14, 0x3);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x12, 0x0);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x13, 0x4);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x11, 0x1);
+
+ il79900a_switch_page(&ctx, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x80, 0x11);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x82, 0x11);
+ il79900a_switch_page(&ctx, 0x12);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x82, 0x2C);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x85, 0x2C);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x87, 0x2C);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x88, 0xEC);
+ il79900a_switch_page(&ctx, 0x10);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x4, 0x1);
+ il79900a_switch_page(&ctx, 0x11);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0C, 0x80);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x3C, 0x80);
+
+ il79900a_switch_page(&ctx, 0x06);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0E, 0x0);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x0E, 0x3F);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x10, 0x0);
+
+ il79900a_switch_page(&ctx, 0x00);
+ mipi_dsi_dcs_set_tear_on_multi(&ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+ mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);
+
+ mipi_dsi_msleep(&ctx, 120);
+
+ mipi_dsi_dcs_set_display_on_multi(&ctx);
+
+ mipi_dsi_msleep(&ctx, 20);
+
+ return ctx.accum_err;
+};
+
static int starry_ili9882t_init(struct ili9882t *ili)
{
struct mipi_dsi_multi_context ctx = { .dsi = ili->dsi };
@@ -670,6 +871,19 @@ static int ili9882t_enable(struct drm_panel *panel)
return 0;
}
+static const struct drm_display_mode rpi_10inch_default_mode = {
+ .clock = 166666,
+ .hdisplay = 1200,
+ .hsync_start = 1200 + 28,
+ .hsync_end = 1200 + 28 + 10,
+ .htotal = 1200 + 28 + 10 + 30,
+ .vdisplay = 1920,
+ .vsync_start = 1920 + 238,
+ .vsync_end = 1920 + 238 + 4,
+ .vtotal = 1920 + 238 + 4 + 28,
+ .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+};
+
static const struct drm_display_mode starry_ili9882t_default_mode = {
.clock = 165280,
.hdisplay = 1200,
@@ -696,6 +910,20 @@ static const struct drm_display_mode tianma_il79900a_default_mode = {
.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
};
+static const struct panel_desc rpi_10inch_desc = {
+ .modes = &rpi_10inch_default_mode,
+ .bpc = 8,
+ .size = {
+ .width_mm = 135,
+ .height_mm = 216,
+ },
+ .lanes = 4,
+ .format = MIPI_DSI_FMT_RGB888,
+ .mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_LPM,
+ .init = rpi_10inch_init,
+};
+
static const struct panel_desc starry_ili9882t_desc = {
.modes = &starry_ili9882t_default_mode,
.bpc = 8,
@@ -866,6 +1094,9 @@ static void ili9882t_remove(struct mipi_dsi_device *dsi)
}
static const struct of_device_id ili9882t_of_match[] = {
+ { .compatible = "raspberrypi,dsi-10inch",
+ .data = &rpi_10inch_desc
+ },
{ .compatible = "starry,ili9882t",
.data = &starry_ili9882t_desc
},
--
2.53.0
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