{"id":2222731,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2222731/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260413-waveshare-dsi-touch-v3-17-3aeb53022c32@oss.qualcomm.com/","project":{"id":42,"url":"http://patchwork.ozlabs.org/api/1.1/projects/42/?format=json","name":"Linux GPIO development","link_name":"linux-gpio","list_id":"linux-gpio.vger.kernel.org","list_email":"linux-gpio@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260413-waveshare-dsi-touch-v3-17-3aeb53022c32@oss.qualcomm.com>","date":"2026-04-13T14:05:40","name":"[v3,17/21] drm/panel: ilitek-ili9881c: support Waveshare 7.0\" DSI panel","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"53cc4a558057642000693aa932776317ac18e8e0","submitter":{"id":90483,"url":"http://patchwork.ozlabs.org/api/1.1/people/90483/?format=json","name":"Dmitry Baryshkov","email":"dmitry.baryshkov@oss.qualcomm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260413-waveshare-dsi-touch-v3-17-3aeb53022c32@oss.qualcomm.com/mbox/","series":[{"id":499710,"url":"http://patchwork.ozlabs.org/api/1.1/series/499710/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/list/?series=499710","date":"2026-04-13T14:05:24","name":"drm/panel: support Waveshare DSI TOUCH kits","version":3,"mbox":"http://patchwork.ozlabs.org/series/499710/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2222731/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2222731/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-gpio@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=LG5NY+Pi;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=NFKqQyAB;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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It requires\nadditional voltage regulator, iovcc.\n\nSigned-off-by: Dmitry Baryshkov \n---\n drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 251 +++++++++++++++++++++++++-\n 1 file changed, 249 insertions(+), 2 deletions(-)","diff":"diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c\nindex 947b47841b01..0652cdb57d11 100644\n--- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c\n+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c\n@@ -52,6 +52,7 @@ struct ili9881c {\n \tconst struct ili9881c_desc\t*desc;\n \n \tstruct regulator\t*power;\n+\tstruct regulator\t*iovcc;\n \tstruct gpio_desc\t*reset;\n \n \tenum drm_panel_orientation\torientation;\n@@ -1997,6 +1998,205 @@ static const struct ili9881c_instr bsd1218_a101kl68_init[] = {\n \tILI9881C_COMMAND_INSTR(0xd3, 0x3f),\n };\n \n+static const struct ili9881c_instr waveshare_7inch_a_init[] = {\n+\tILI9881C_SWITCH_PAGE_INSTR(3),\n+\tILI9881C_COMMAND_INSTR(0x01, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x02, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x03, 0x73),\n+\tILI9881C_COMMAND_INSTR(0x04, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x05, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x06, 0x0a),\n+\tILI9881C_COMMAND_INSTR(0x07, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x08, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x09, 0x61),\n+\tILI9881C_COMMAND_INSTR(0x0a, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x0b, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x0c, 0x01),\n+\tILI9881C_COMMAND_INSTR(0x0d, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x0e, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x0f, 0x61),\n+\tILI9881C_COMMAND_INSTR(0x10, 0x61),\n+\tILI9881C_COMMAND_INSTR(0x11, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x12, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x13, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x14, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x15, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x16, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x17, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x18, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x19, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x1a, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x1b, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x1c, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x1d, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x1e, 0x40),\n+\tILI9881C_COMMAND_INSTR(0x1f, 0x80),\n+\tILI9881C_COMMAND_INSTR(0x20, 0x06),\n+\tILI9881C_COMMAND_INSTR(0x21, 0x01),\n+\tILI9881C_COMMAND_INSTR(0x22, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x23, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x24, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x25, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x26, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x27, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x28, 0x33),\n+\tILI9881C_COMMAND_INSTR(0x29, 0x03),\n+\tILI9881C_COMMAND_INSTR(0x2a, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x2b, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x2c, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x2d, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x2e, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x2f, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x30, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x31, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x32, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x33, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x34, 0x04),\n+\tILI9881C_COMMAND_INSTR(0x35, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x36, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x37, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x38, 0x3c),\n+\tILI9881C_COMMAND_INSTR(0x39, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x3a, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x3b, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x3c, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x3d, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x3e, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x3f, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x40, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x41, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x42, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x43, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x44, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x50, 0x10),\n+\tILI9881C_COMMAND_INSTR(0x51, 0x32),\n+\tILI9881C_COMMAND_INSTR(0x52, 0x54),\n+\tILI9881C_COMMAND_INSTR(0x53, 0x76),\n+\tILI9881C_COMMAND_INSTR(0x54, 0x98),\n+\tILI9881C_COMMAND_INSTR(0x55, 0xba),\n+\tILI9881C_COMMAND_INSTR(0x56, 0x10),\n+\tILI9881C_COMMAND_INSTR(0x57, 0x32),\n+\tILI9881C_COMMAND_INSTR(0x58, 0x54),\n+\tILI9881C_COMMAND_INSTR(0x59, 0x76),\n+\tILI9881C_COMMAND_INSTR(0x5a, 0x98),\n+\tILI9881C_COMMAND_INSTR(0x5b, 0xba),\n+\tILI9881C_COMMAND_INSTR(0x5c, 0xdc),\n+\tILI9881C_COMMAND_INSTR(0x5d, 0xfe),\n+\tILI9881C_COMMAND_INSTR(0x5e, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x5f, 0x0e),\n+\tILI9881C_COMMAND_INSTR(0x60, 0x0f),\n+\tILI9881C_COMMAND_INSTR(0x61, 0x0c),\n+\tILI9881C_COMMAND_INSTR(0x62, 0x0d),\n+\tILI9881C_COMMAND_INSTR(0x63, 0x06),\n+\tILI9881C_COMMAND_INSTR(0x64, 0x07),\n+\tILI9881C_COMMAND_INSTR(0x65, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x66, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x67, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x68, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x69, 0x01),\n+\tILI9881C_COMMAND_INSTR(0x6a, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x6b, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x6c, 0x15),\n+\tILI9881C_COMMAND_INSTR(0x6d, 0x14),\n+\tILI9881C_COMMAND_INSTR(0x6e, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x6f, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x70, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x71, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x72, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x73, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x74, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x75, 0x0e),\n+\tILI9881C_COMMAND_INSTR(0x76, 0x0f),\n+\tILI9881C_COMMAND_INSTR(0x77, 0x0c),\n+\tILI9881C_COMMAND_INSTR(0x78, 0x0d),\n+\tILI9881C_COMMAND_INSTR(0x79, 0x06),\n+\tILI9881C_COMMAND_INSTR(0x7a, 0x07),\n+\tILI9881C_COMMAND_INSTR(0x7b, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x7c, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x7d, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x7e, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x7f, 0x01),\n+\tILI9881C_COMMAND_INSTR(0x80, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x81, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x82, 0x14),\n+\tILI9881C_COMMAND_INSTR(0x83, 0x15),\n+\tILI9881C_COMMAND_INSTR(0x84, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x85, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x86, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x87, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x88, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x89, 0x02),\n+\tILI9881C_COMMAND_INSTR(0x8a, 0x02),\n+\n+\tILI9881C_SWITCH_PAGE_INSTR(4),\n+\tILI9881C_COMMAND_INSTR(0x38, 0x01),\n+\tILI9881C_COMMAND_INSTR(0x39, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x6c, 0x15),\n+\tILI9881C_COMMAND_INSTR(0x6e, 0x2a),\n+\tILI9881C_COMMAND_INSTR(0x6f, 0x33),\n+\tILI9881C_COMMAND_INSTR(0x3a, 0x94),\n+\tILI9881C_COMMAND_INSTR(0x8d, 0x14),\n+\tILI9881C_COMMAND_INSTR(0x87, 0xba),\n+\tILI9881C_COMMAND_INSTR(0x26, 0x76),\n+\tILI9881C_COMMAND_INSTR(0xb2, 0xd1),\n+\tILI9881C_COMMAND_INSTR(0xb5, 0x06),\n+\tILI9881C_COMMAND_INSTR(0x3b, 0x98),\n+\n+\tILI9881C_SWITCH_PAGE_INSTR(1),\n+\tILI9881C_COMMAND_INSTR(0x22, 0x0a),\n+\tILI9881C_COMMAND_INSTR(0x31, 0x00),\n+\tILI9881C_COMMAND_INSTR(0x53, 0x71),\n+\tILI9881C_COMMAND_INSTR(0x55, 0x8f),\n+\tILI9881C_COMMAND_INSTR(0x40, 0x33),\n+\tILI9881C_COMMAND_INSTR(0x50, 0x96),\n+\tILI9881C_COMMAND_INSTR(0x51, 0x96),\n+\tILI9881C_COMMAND_INSTR(0x60, 0x23),\n+\tILI9881C_COMMAND_INSTR(0xa0, 0x08),\n+\tILI9881C_COMMAND_INSTR(0xa1, 0x1d),\n+\tILI9881C_COMMAND_INSTR(0xa2, 0x2a),\n+\tILI9881C_COMMAND_INSTR(0xa3, 0x10),\n+\tILI9881C_COMMAND_INSTR(0xa4, 0x15),\n+\tILI9881C_COMMAND_INSTR(0xa5, 0x28),\n+\tILI9881C_COMMAND_INSTR(0xa6, 0x1c),\n+\tILI9881C_COMMAND_INSTR(0xa7, 0x1d),\n+\tILI9881C_COMMAND_INSTR(0xa8, 0x7e),\n+\tILI9881C_COMMAND_INSTR(0xa9, 0x1d),\n+\tILI9881C_COMMAND_INSTR(0xaa, 0x29),\n+\tILI9881C_COMMAND_INSTR(0xab, 0x6b),\n+\tILI9881C_COMMAND_INSTR(0xac, 0x1a),\n+\tILI9881C_COMMAND_INSTR(0xad, 0x18),\n+\tILI9881C_COMMAND_INSTR(0xae, 0x4b),\n+\tILI9881C_COMMAND_INSTR(0xaf, 0x20),\n+\tILI9881C_COMMAND_INSTR(0xb0, 0x27),\n+\tILI9881C_COMMAND_INSTR(0xb1, 0x50),\n+\tILI9881C_COMMAND_INSTR(0xb2, 0x64),\n+\tILI9881C_COMMAND_INSTR(0xb3, 0x39),\n+\tILI9881C_COMMAND_INSTR(0xc0, 0x08),\n+\tILI9881C_COMMAND_INSTR(0xc1, 0x1d),\n+\tILI9881C_COMMAND_INSTR(0xc2, 0x2a),\n+\tILI9881C_COMMAND_INSTR(0xc3, 0x10),\n+\tILI9881C_COMMAND_INSTR(0xc4, 0x15),\n+\tILI9881C_COMMAND_INSTR(0xc5, 0x28),\n+\tILI9881C_COMMAND_INSTR(0xc6, 0x1c),\n+\tILI9881C_COMMAND_INSTR(0xc7, 0x1d),\n+\tILI9881C_COMMAND_INSTR(0xc8, 0x7e),\n+\tILI9881C_COMMAND_INSTR(0xc9, 0x1d),\n+\tILI9881C_COMMAND_INSTR(0xca, 0x29),\n+\tILI9881C_COMMAND_INSTR(0xcb, 0x6b),\n+\tILI9881C_COMMAND_INSTR(0xcc, 0x1a),\n+\tILI9881C_COMMAND_INSTR(0xcd, 0x18),\n+\tILI9881C_COMMAND_INSTR(0xce, 0x4b),\n+\tILI9881C_COMMAND_INSTR(0xcf, 0x20),\n+\tILI9881C_COMMAND_INSTR(0xd0, 0x27),\n+\tILI9881C_COMMAND_INSTR(0xd1, 0x50),\n+\tILI9881C_COMMAND_INSTR(0xd2, 0x64),\n+\tILI9881C_COMMAND_INSTR(0xd3, 0x39),\n+\n+\tILI9881C_SWITCH_PAGE_INSTR(0),\n+\tILI9881C_COMMAND_INSTR(0x3a, 0x77),\n+\tILI9881C_COMMAND_INSTR(0x36, 0x00),\n+};\n+\n static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)\n {\n \treturn container_of(panel, struct ili9881c, panel);\n@@ -2035,9 +2235,19 @@ static int ili9881c_prepare(struct drm_panel *panel)\n \tint ret;\n \n \t/* Power the panel */\n+\tif (ctx->iovcc) {\n+\t\tret = regulator_enable(ctx->iovcc);\n+\t\tif (ret)\n+\t\t\treturn ret;\n+\t}\n+\n+\tmsleep(5);\n \tret = regulator_enable(ctx->power);\n-\tif (ret)\n-\t\treturn ret;\n+\tif (ret) {\n+\t\tmctx.accum_err = ret;\n+\t\tgoto disable_iovcc;\n+\t}\n+\n \tmsleep(5);\n \n \t/* And reset it */\n@@ -2074,6 +2284,9 @@ static int ili9881c_prepare(struct drm_panel *panel)\n \n disable_power:\n \tregulator_disable(ctx->power);\n+disable_iovcc:\n+\tif (ctx->iovcc)\n+\t\tregulator_disable(ctx->iovcc);\n \treturn mctx.accum_err;\n }\n \n@@ -2085,6 +2298,8 @@ static int ili9881c_unprepare(struct drm_panel *panel)\n \tmipi_dsi_dcs_set_display_off_multi(&mctx);\n \tmipi_dsi_dcs_enter_sleep_mode_multi(&mctx);\n \tregulator_disable(ctx->power);\n+\tif (ctx->iovcc)\n+\t\tregulator_disable(ctx->iovcc);\n \tgpiod_set_value_cansleep(ctx->reset, 1);\n \n \treturn 0;\n@@ -2260,6 +2475,23 @@ static const struct drm_display_mode bsd1218_a101kl68_default_mode = {\n \t.height_mm\t= 170,\n };\n \n+static const struct drm_display_mode waveshare_7inch_a_mode = {\n+\t.clock\t\t= 83333,\n+\n+\t.hdisplay\t= 720,\n+\t.hsync_start\t= 720 + 120,\n+\t.hsync_end\t= 720 + 120 + 100,\n+\t.htotal\t\t= 720 + 120 + 100 + 100,\n+\n+\t.vdisplay\t= 1280,\n+\t.vsync_start\t= 1280 + 10,\n+\t.vsync_end\t= 1280 + 10 + 10,\n+\t.vtotal\t\t= 1280 + 10 + 10 + 10,\n+\n+\t.width_mm\t= 85,\n+\t.height_mm\t= 154,\n+};\n+\n static int ili9881c_get_modes(struct drm_panel *panel,\n \t\t\t struct drm_connector *connector)\n {\n@@ -2329,6 +2561,11 @@ static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)\n \t\treturn dev_err_probe(&dsi->dev, PTR_ERR(ctx->power),\n \t\t\t\t \"Couldn't get our power regulator\\n\");\n \n+\tctx->iovcc = devm_regulator_get_optional(&dsi->dev, \"iovcc\");\n+\tif (IS_ERR(ctx->iovcc))\n+\t\treturn dev_err_probe(&dsi->dev, PTR_ERR(ctx->iovcc),\n+\t\t\t\t \"Couldn't get our iovcc regulator\\n\");\n+\n \tctx->reset = devm_gpiod_get_optional(&dsi->dev, \"reset\", GPIOD_OUT_LOW);\n \tif (IS_ERR(ctx->reset))\n \t\treturn dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),\n@@ -2454,6 +2691,15 @@ static const struct ili9881c_desc bsd1218_a101kl68_desc = {\n \t.lanes = 4,\n };\n \n+static const struct ili9881c_desc waveshare_7inch_a_desc = {\n+\t.init = waveshare_7inch_a_init,\n+\t.init_length = ARRAY_SIZE(waveshare_7inch_a_init),\n+\t.mode = &waveshare_7inch_a_mode,\n+\t.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_HSE |\n+\t\t MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS,\n+\t.lanes = 2,\n+};\n+\n static const struct of_device_id ili9881c_of_match[] = {\n \t{ .compatible = \"bananapi,lhr050h41\", .data = &lhr050h41_desc },\n \t{ .compatible = \"bestar,bsd1218-a101kl68\", .data = &bsd1218_a101kl68_desc },\n@@ -2462,6 +2708,7 @@ static const struct of_device_id ili9881c_of_match[] = {\n \t{ .compatible = \"tdo,tl050hdv35\", .data = &tl050hdv35_desc },\n \t{ .compatible = \"wanchanglong,w552946aaa\", .data = &w552946aaa_desc },\n \t{ .compatible = \"wanchanglong,w552946aba\", .data = &w552946aba_desc },\n+\t{ .compatible = \"waveshare,7.0-dsi-touch-a\", .data = &waveshare_7inch_a_desc },\n \t{ .compatible = \"ampire,am8001280g\", .data = &am8001280g_desc },\n \t{ .compatible = \"raspberrypi,dsi-5inch\", &rpi_5inch_desc },\n \t{ .compatible = \"raspberrypi,dsi-7inch\", &rpi_7inch_desc },\n","prefixes":["v3","17/21"]}