{"id":2222403,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2222403/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260411-waveshare-dsi-touch-v2-19-75cdbeac5156@oss.qualcomm.com/","project":{"id":42,"url":"http://patchwork.ozlabs.org/api/1.2/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":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260411-waveshare-dsi-touch-v2-19-75cdbeac5156@oss.qualcomm.com>","list_archive_url":null,"date":"2026-04-11T12:10:39","name":"[v2,19/21] drm/panel: add driver for Waveshare 8.8\" DSI TOUCH-A panel","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"84c862ef15220f64da9f4acdadd3b0ef8428c518","submitter":{"id":90483,"url":"http://patchwork.ozlabs.org/api/1.2/people/90483/?format=json","name":"Dmitry Baryshkov","email":"dmitry.baryshkov@oss.qualcomm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-gpio/patch/20260411-waveshare-dsi-touch-v2-19-75cdbeac5156@oss.qualcomm.com/mbox/","series":[{"id":499552,"url":"http://patchwork.ozlabs.org/api/1.2/series/499552/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-gpio/list/?series=499552","date":"2026-04-11T12:10:21","name":"drm/panel: support Waveshare DSI TOUCH kits","version":2,"mbox":"http://patchwork.ozlabs.org/series/499552/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2222403/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2222403/checks/","tags":{},"related":[],"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=GuYeWTzn;\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=Y2HRxJtd;\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\nuses ota7290b IC as a controller.\n\nReviewed-by: Linus Walleij \nSigned-off-by: Dmitry Baryshkov \n---\n drivers/gpu/drm/panel/Kconfig | 12 ++\n drivers/gpu/drm/panel/Makefile | 1 +\n drivers/gpu/drm/panel/panel-focaltech-ota7290b.c | 208 +++++++++++++++++++++++\n 3 files changed, 221 insertions(+)","diff":"diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig\nindex ba527b4d7737..979109c27b9b 100644\n--- a/drivers/gpu/drm/panel/Kconfig\n+++ b/drivers/gpu/drm/panel/Kconfig\n@@ -144,6 +144,18 @@ config DRM_PANEL_FEIYANG_FY07024DI26A30D\n \t Say Y if you want to enable support for panels based on the\n \t Feiyang FY07024DI26A30-D MIPI-DSI interface.\n \n+config DRM_PANEL_FOCALTECH_OTA7290B\n+\ttristate \"Focaltech OTA7290B\"\n+\tdepends on DRM_MIPI_DSI\n+\tdepends on I2C\n+\tdepends on BACKLIGHT_CLASS_DEVICE\n+\tselect DRM_KMS_HELPER\n+\thelp\n+\t Enable support for panels using OTA7290B as a controller (for\n+\t example, Waveshare 12.3\" DSI TOUCH-A panel). Say Y here if you want\n+\t to enable support for this panel. To compile this driver as a module,\n+\t choose M here.\n+\n config DRM_PANEL_DSI_CM\n \ttristate \"Generic DSI command mode panels\"\n \tdepends on OF\ndiff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile\nindex a4291dc3905b..0d694acbfbb6 100644\n--- a/drivers/gpu/drm/panel/Makefile\n+++ b/drivers/gpu/drm/panel/Makefile\n@@ -17,6 +17,7 @@ obj-$(CONFIG_DRM_PANEL_EBBG_FT8719) += panel-ebbg-ft8719.o\n obj-$(CONFIG_DRM_PANEL_ELIDA_KD35T133) += panel-elida-kd35t133.o\n obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o\n obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o\n+obj-$(CONFIG_DRM_PANEL_FOCALTECH_OTA7290B) += panel-focaltech-ota7290b.o\n obj-$(CONFIG_DRM_PANEL_HIMAX_HX8279) += panel-himax-hx8279.o\n obj-$(CONFIG_DRM_PANEL_HIMAX_HX83102) += panel-himax-hx83102.o\n obj-$(CONFIG_DRM_PANEL_HIMAX_HX83112A) += panel-himax-hx83112a.o\ndiff --git a/drivers/gpu/drm/panel/panel-focaltech-ota7290b.c b/drivers/gpu/drm/panel/panel-focaltech-ota7290b.c\nnew file mode 100644\nindex 000000000000..991d6a4caf17\n--- /dev/null\n+++ b/drivers/gpu/drm/panel/panel-focaltech-ota7290b.c\n@@ -0,0 +1,208 @@\n+// SPDX-License-Identifier: GPL-2.0\n+/*\n+ * Copyright (C) 2024 Waveshare International Limited\n+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.\n+ */\n+\n+#include \n+#include \n+#include \n+#include \n+#include \n+#include \n+#include \n+\n+#include \n+#include \n+\n+#include \n+#include \n+#include \n+#include \n+\n+struct ota7290b {\n+\tstruct drm_panel panel;\n+\tstruct mipi_dsi_device *dsi;\n+\n+\tstruct regulator *power;\n+\tstruct gpio_desc *reset;\n+\tstruct regulator *avdd;\n+\tstruct regulator *iovcc;\n+\n+\tenum drm_panel_orientation orientation;\n+};\n+\n+static inline struct ota7290b *panel_to_ota(struct drm_panel *panel)\n+{\n+\treturn container_of(panel, struct ota7290b, panel);\n+}\n+\n+static int ota7290b_prepare(struct drm_panel *panel)\n+{\n+\tstruct ota7290b *ctx = panel_to_ota(panel);\n+\tstruct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };\n+\tint ret;\n+\n+\tif (ctx->iovcc) {\n+\t\tret = regulator_enable(ctx->iovcc);\n+\t\tif (ret)\n+\t\t\tdev_err(panel->dev, \"failed to enable IO regulator: %d\\n\", ret);\n+\t}\n+\n+\tif (ctx->avdd) {\n+\t\tret = regulator_enable(ctx->avdd);\n+\t\tif (ret)\n+\t\t\tdev_err(panel->dev, \"failed to enable AVDD regulator: %d\\n\", ret);\n+\t}\n+\n+\tif (ctx->reset) {\n+\t\tgpiod_set_value_cansleep(ctx->reset, 0);\n+\t\tmsleep(60);\n+\t\tgpiod_set_value_cansleep(ctx->reset, 1);\n+\t\tmsleep(60);\n+\t\tgpiod_set_value_cansleep(ctx->reset, 0);\n+\t\tmsleep(60);\n+\t}\n+\n+\tmipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);\n+\tmipi_dsi_msleep(&dsi_ctx, 120);\n+\tmipi_dsi_dcs_set_display_on_multi(&dsi_ctx);\n+\tmipi_dsi_msleep(&dsi_ctx, 50);\n+\n+\tif (dsi_ctx.accum_err < 0)\n+\t\tdev_err(panel->dev, \"failed to init panel: %d\\n\", ret);\n+\n+\treturn dsi_ctx.accum_err;\n+}\n+\n+static int ota7290b_unprepare(struct drm_panel *panel)\n+{\n+\tstruct ota7290b *ctx = panel_to_ota(panel);\n+\tstruct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };\n+\n+\tmipi_dsi_dcs_set_display_off_multi(&dsi_ctx);\n+\tmipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);\n+\n+\tif (ctx->reset) {\n+\t\tgpiod_set_value_cansleep(ctx->reset, 1);\n+\t\tmsleep(5);\n+\t}\n+\n+\tif (ctx->avdd)\n+\t\tregulator_disable(ctx->avdd);\n+\n+\tif (ctx->iovcc)\n+\t\tregulator_disable(ctx->iovcc);\n+\n+\treturn 0;\n+}\n+\n+static const struct drm_display_mode waveshare_dsi_touch_8_8_a_mode = {\n+\t.clock = 75000,\n+\n+\t.hdisplay = 480,\n+\t.hsync_start = 480 + 50,\n+\t.hsync_end = 480 + 50 + 50,\n+\t.htotal = 480 + 50 + 50 + 50,\n+\n+\t.vdisplay = 1920,\n+\t.vsync_start = 1920 + 20,\n+\t.vsync_end = 1920 + 20 + 20,\n+\t.vtotal = 1920 + 20 + 20 + 20,\n+\n+\t.width_mm = 68,\n+\t.height_mm = 219,\n+\t.type = DRM_MODE_TYPE_DRIVER,\n+};\n+\n+static int ota7290b_get_modes(struct drm_panel *panel,\n+\t\t\t struct drm_connector *connector)\n+{\n+\treturn drm_connector_helper_get_modes_fixed(connector, &waveshare_dsi_touch_8_8_a_mode);\n+}\n+\n+static enum drm_panel_orientation ota7290b_get_orientation(struct drm_panel *panel)\n+{\n+\tstruct ota7290b *ctx = panel_to_ota(panel);\n+\n+\treturn ctx->orientation;\n+}\n+\n+static const struct drm_panel_funcs ota7290b_funcs = {\n+\t.prepare = ota7290b_prepare,\n+\t.unprepare = ota7290b_unprepare,\n+\t.get_modes = ota7290b_get_modes,\n+\t.get_orientation = ota7290b_get_orientation,\n+};\n+\n+static int ota7290b_probe(struct mipi_dsi_device *dsi)\n+{\n+\tstruct ota7290b *ctx;\n+\tint ret;\n+\n+\tctx = devm_drm_panel_alloc(&dsi->dev, struct ota7290b, panel,\n+\t\t\t\t &ota7290b_funcs,\n+\t\t\t\t DRM_MODE_CONNECTOR_DSI);\n+\tif (!ctx)\n+\t\treturn -ENOMEM;\n+\tmipi_dsi_set_drvdata(dsi, ctx);\n+\tctx->dsi = dsi;\n+\n+\tctx->reset = devm_gpiod_get_optional(&dsi->dev, \"reset\", GPIOD_OUT_HIGH);\n+\tif (IS_ERR(ctx->reset))\n+\t\treturn dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),\n+\t\t\t\t \"Couldn't get our reset GPIO\\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\t\"Couldn't get our iovcc supply\\n\");\n+\n+\tctx->avdd = devm_regulator_get_optional(&dsi->dev, \"avdd\");\n+\tif (IS_ERR(ctx->avdd))\n+\t\treturn dev_err_probe(&dsi->dev, PTR_ERR(ctx->avdd),\n+\t\t\t\t\t\"Couldn't get our avdd supply\\n\");\n+\n+\tret = of_drm_get_panel_orientation(\n+\t\t\tdsi->dev.of_node, &ctx->orientation);\n+\tif (ret) {\n+\t\tdev_err(&dsi->dev, \"%pOF: failed to get orientation: %d\\n\",\n+\t\t\tdsi->dev.of_node, ret);\n+\t\treturn ret;\n+\t}\n+\n+\tret = drm_panel_of_backlight(&ctx->panel);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\tctx->panel.prepare_prev_first = true;\n+\n+\tret = devm_drm_panel_add(&dsi->dev, &ctx->panel);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\tdsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_HSE |\n+\t\tMIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS,\n+\tdsi->format = MIPI_DSI_FMT_RGB888,\n+\tdsi->lanes = 2;\n+\n+\treturn devm_mipi_dsi_attach(&dsi->dev, dsi);\n+}\n+\n+static const struct of_device_id ota7290b_of_match[] = {\n+\t{ .compatible = \"waveshare,8.8-dsi-touch-a\", },\n+\t{}\n+};\n+MODULE_DEVICE_TABLE(of, ota7290b_of_match);\n+\n+static struct mipi_dsi_driver ota7290b_driver = {\n+\t.probe\t\t= ota7290b_probe,\n+\t.driver = {\n+\t\t.name\t\t= \"focaltech-ota7290b\",\n+\t\t.of_match_table\t= ota7290b_of_match,\n+\t},\n+};\n+module_mipi_dsi_driver(ota7290b_driver);\n+\n+MODULE_DESCRIPTION(\"Panel driver for Focaltech OTA7290B panels\");\n+MODULE_LICENSE(\"GPL\");\n","prefixes":["v2","19/21"]}